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servo/components/script/dom/webglrenderingcontext.rs
Igor Matuszewski e025bbb079 WIP: Accept typed array arguments in codegen
2018-03-14 18:43:26 +01:00

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use byteorder::{NativeEndian, ReadBytesExt, WriteBytesExt};
use canvas_traits::canvas::{byte_swap, multiply_u8_pixel};
use canvas_traits::webgl::{WebGLContextShareMode, WebGLCommand, WebGLError, WebGLVersion, WebGLSLVersion};
use canvas_traits::webgl::{WebGLFramebufferBindingRequest, WebGLMsg, WebGLMsgSender, WebGLParameter, WebVRCommand};
use canvas_traits::webgl::DOMToTextureCommand;
use canvas_traits::webgl::WebGLError::*;
use canvas_traits::webgl::webgl_channel;
use dom::bindings::cell::DomRefCell;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::{self, WebGLContextAttributes};
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextMethods;
use dom::bindings::codegen::UnionTypes::ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement;
use dom::bindings::conversions::{ConversionResult, FromJSValConvertible, ToJSValConvertible};
use dom::bindings::error::{Error, Fallible};
use dom::bindings::inheritance::Castable;
use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
use dom::bindings::root::{Dom, DomRoot, LayoutDom, MutNullableDom};
use dom::bindings::str::DOMString;
use dom::event::{Event, EventBubbles, EventCancelable};
use dom::htmlcanvaselement::HTMLCanvasElement;
use dom::htmlcanvaselement::utils as canvas_utils;
use dom::htmliframeelement::HTMLIFrameElement;
use dom::node::{Node, NodeDamage, window_from_node};
use dom::webgl_extensions::WebGLExtensions;
use dom::webgl_validations::WebGLValidator;
use dom::webgl_validations::tex_image_2d::{CommonTexImage2DValidator, CommonTexImage2DValidatorResult};
use dom::webgl_validations::tex_image_2d::{TexImage2DValidator, TexImage2DValidatorResult};
use dom::webgl_validations::types::{TexDataType, TexFormat, TexImageTarget};
use dom::webglactiveinfo::WebGLActiveInfo;
use dom::webglbuffer::WebGLBuffer;
use dom::webglcontextevent::WebGLContextEvent;
use dom::webglframebuffer::WebGLFramebuffer;
use dom::webglprogram::WebGLProgram;
use dom::webglrenderbuffer::WebGLRenderbuffer;
use dom::webglshader::WebGLShader;
use dom::webglshaderprecisionformat::WebGLShaderPrecisionFormat;
use dom::webgltexture::{TexParameterValue, WebGLTexture};
use dom::webgluniformlocation::WebGLUniformLocation;
use dom::window::Window;
use dom_struct::dom_struct;
use euclid::Size2D;
use fnv::FnvHashMap;
use half::f16;
use js::conversions::ConversionBehavior;
use js::jsapi::{JSContext, JSObject, Type};
use js::jsval::{BooleanValue, DoubleValue, Int32Value, JSVal, NullValue, UndefinedValue};
use js::typedarray::{TypedArray, TypedArrayElement, Float32, Int32};
use net_traits::image::base::PixelFormat;
use net_traits::image_cache::ImageResponse;
use offscreen_gl_context::{GLContextAttributes, GLLimits};
use script_layout_interface::HTMLCanvasDataSource;
use servo_config::prefs::PREFS;
use std::cell::{Cell, Ref};
use std::iter::FromIterator;
use std::ptr::NonNull;
use webrender_api;
type ImagePixelResult = Result<(Vec<u8>, Size2D<i32>, bool), ()>;
pub const MAX_UNIFORM_AND_ATTRIBUTE_LEN: usize = 256;
macro_rules! handle_potential_webgl_error {
($context:ident, $call:expr, $return_on_error:expr) => {
match $call {
Ok(ret) => ret,
Err(error) => {
$context.webgl_error(error);
$return_on_error
}
}
};
($context:ident, $call:expr) => {
handle_potential_webgl_error!($context, $call, ());
};
}
// From the GLES 2.0.25 spec, page 85:
//
// "If a texture that is currently bound to one of the targets
// TEXTURE_2D, or TEXTURE_CUBE_MAP is deleted, it is as though
// BindTexture had been executed with the same target and texture
// zero."
//
// and similar text occurs for other object types.
macro_rules! handle_object_deletion {
($self_:expr, $binding:expr, $object:ident, $unbind_command:expr) => {
if let Some(bound_object) = $binding.get() {
if bound_object.id() == $object.id() {
$binding.set(None);
}
if let Some(command) = $unbind_command {
$self_.send_command(command);
}
}
};
}
macro_rules! object_binding_to_js_or_null {
($cx: expr, $binding:expr) => {
{
rooted!(in($cx) let mut rval = NullValue());
if let Some(bound_object) = $binding.get() {
bound_object.to_jsval($cx, rval.handle_mut());
}
rval.get()
}
};
}
macro_rules! optional_root_object_to_js_or_null {
($cx: expr, $binding:expr) => {
{
rooted!(in($cx) let mut rval = NullValue());
if let Some(object) = $binding {
object.to_jsval($cx, rval.handle_mut());
}
rval.get()
}
};
}
fn has_invalid_blend_constants(arg1: u32, arg2: u32) -> bool {
match (arg1, arg2) {
(constants::CONSTANT_COLOR, constants::CONSTANT_ALPHA) => true,
(constants::ONE_MINUS_CONSTANT_COLOR, constants::ONE_MINUS_CONSTANT_ALPHA) => true,
(constants::ONE_MINUS_CONSTANT_COLOR, constants::CONSTANT_ALPHA) => true,
(constants::CONSTANT_COLOR, constants::ONE_MINUS_CONSTANT_ALPHA) => true,
(_, _) => false
}
}
/// Set of bitflags for texture unpacking (texImage2d, etc...)
bitflags! {
#[derive(JSTraceable, MallocSizeOf)]
struct TextureUnpacking: u8 {
const FLIP_Y_AXIS = 0x01;
const PREMULTIPLY_ALPHA = 0x02;
const CONVERT_COLORSPACE = 0x04;
}
}
/// Information about the bound textures of a WebGL texture unit.
#[must_root]
#[derive(JSTraceable, MallocSizeOf)]
struct TextureUnitBindings {
bound_texture_2d: MutNullableDom<WebGLTexture>,
bound_texture_cube_map: MutNullableDom<WebGLTexture>,
}
impl TextureUnitBindings {
fn new() -> Self {
Self {
bound_texture_2d: MutNullableDom::new(None),
bound_texture_cube_map: MutNullableDom::new(None),
}
}
/// Clears the slot associated to the given texture.
/// Returns the GL target of the cleared slot, if any.
fn clear_slot(&self, texture: &WebGLTexture) -> Option<u32> {
let fields = [(&self.bound_texture_2d, constants::TEXTURE_2D),
(&self.bound_texture_cube_map, constants::TEXTURE_CUBE_MAP)];
fields.iter().find(|field| {
match field.0.get() {
Some(t) => t.id() == texture.id(),
_ => false,
}
}).and_then(|field| {
field.0.set(None);
Some(field.1)
})
}
}
#[dom_struct]
pub struct WebGLRenderingContext {
reflector_: Reflector,
#[ignore_malloc_size_of = "Channels are hard"]
webgl_sender: WebGLMsgSender,
#[ignore_malloc_size_of = "Defined in webrender"]
webrender_image: Cell<Option<webrender_api::ImageKey>>,
share_mode: WebGLContextShareMode,
webgl_version: WebGLVersion,
glsl_version: WebGLSLVersion,
#[ignore_malloc_size_of = "Defined in offscreen_gl_context"]
limits: GLLimits,
canvas: Dom<HTMLCanvasElement>,
#[ignore_malloc_size_of = "Defined in canvas_traits"]
last_error: Cell<Option<WebGLError>>,
texture_unpacking_settings: Cell<TextureUnpacking>,
texture_unpacking_alignment: Cell<u32>,
bound_framebuffer: MutNullableDom<WebGLFramebuffer>,
bound_renderbuffer: MutNullableDom<WebGLRenderbuffer>,
bound_textures: DomRefCell<FnvHashMap<u32, TextureUnitBindings>>,
bound_texture_unit: Cell<u32>,
bound_buffer_array: MutNullableDom<WebGLBuffer>,
bound_buffer_element_array: MutNullableDom<WebGLBuffer>,
bound_attrib_buffers: DomRefCell<FnvHashMap<u32, Dom<WebGLBuffer>>>,
current_program: MutNullableDom<WebGLProgram>,
#[ignore_malloc_size_of = "Because it's small"]
current_vertex_attrib_0: Cell<(f32, f32, f32, f32)>,
#[ignore_malloc_size_of = "Because it's small"]
current_scissor: Cell<(i32, i32, i32, i32)>,
#[ignore_malloc_size_of = "Because it's small"]
current_clear_color: Cell<(f32, f32, f32, f32)>,
extension_manager: WebGLExtensions,
}
impl WebGLRenderingContext {
pub fn new_inherited(
window: &Window,
canvas: &HTMLCanvasElement,
webgl_version: WebGLVersion,
size: Size2D<i32>,
attrs: GLContextAttributes
) -> Result<WebGLRenderingContext, String> {
if let Some(true) = PREFS.get("webgl.testing.context_creation_error").as_boolean() {
return Err("WebGL context creation error forced by pref `webgl.testing.context_creation_error`".into());
}
let webgl_chan = match window.webgl_chan() {
Some(chan) => chan,
None => return Err("WebGL initialization failed early on".into()),
};
let (sender, receiver) = webgl_channel().unwrap();
webgl_chan.send(WebGLMsg::CreateContext(webgl_version, size, attrs, sender))
.unwrap();
let result = receiver.recv().unwrap();
result.map(|ctx_data| {
WebGLRenderingContext {
reflector_: Reflector::new(),
webgl_sender: ctx_data.sender,
webrender_image: Cell::new(None),
share_mode: ctx_data.share_mode,
webgl_version,
glsl_version: ctx_data.glsl_version,
limits: ctx_data.limits,
canvas: Dom::from_ref(canvas),
last_error: Cell::new(None),
texture_unpacking_settings: Cell::new(TextureUnpacking::CONVERT_COLORSPACE),
texture_unpacking_alignment: Cell::new(4),
bound_framebuffer: MutNullableDom::new(None),
bound_textures: DomRefCell::new(Default::default()),
bound_texture_unit: Cell::new(constants::TEXTURE0),
bound_buffer_array: MutNullableDom::new(None),
bound_buffer_element_array: MutNullableDom::new(None),
bound_attrib_buffers: DomRefCell::new(Default::default()),
bound_renderbuffer: MutNullableDom::new(None),
current_program: MutNullableDom::new(None),
current_vertex_attrib_0: Cell::new((0f32, 0f32, 0f32, 1f32)),
current_scissor: Cell::new((0, 0, size.width, size.height)),
current_clear_color: Cell::new((0.0, 0.0, 0.0, 0.0)),
extension_manager: WebGLExtensions::new(webgl_version)
}
})
}
#[allow(unrooted_must_root)]
pub fn new(
window: &Window,
canvas: &HTMLCanvasElement,
webgl_version: WebGLVersion,
size: Size2D<i32>,
attrs: GLContextAttributes
) -> Option<DomRoot<WebGLRenderingContext>> {
match WebGLRenderingContext::new_inherited(window, canvas, webgl_version, size, attrs) {
Ok(ctx) => Some(reflect_dom_object(Box::new(ctx), window, WebGLRenderingContextBinding::Wrap)),
Err(msg) => {
error!("Couldn't create WebGLRenderingContext: {}", msg);
let event = WebGLContextEvent::new(window,
atom!("webglcontextcreationerror"),
EventBubbles::DoesNotBubble,
EventCancelable::Cancelable,
DOMString::from(msg));
event.upcast::<Event>().fire(canvas.upcast());
None
}
}
}
pub fn limits(&self) -> &GLLimits {
&self.limits
}
fn bound_texture(&self, target: u32) -> Option<DomRoot<WebGLTexture>> {
match target {
constants::TEXTURE_2D => {
self.bound_textures.borrow().get(&self.bound_texture_unit.get()).and_then(|t| {
t.bound_texture_2d.get()
})
},
constants::TEXTURE_CUBE_MAP => {
self.bound_textures.borrow().get(&self.bound_texture_unit.get()).and_then(|t| {
t.bound_texture_cube_map.get()
})
},
_ => None,
}
}
pub fn bound_texture_for_target(&self, target: &TexImageTarget) -> Option<DomRoot<WebGLTexture>> {
self.bound_textures.borrow().get(&self.bound_texture_unit.get()).and_then(|binding| {
match *target {
TexImageTarget::Texture2D => binding.bound_texture_2d.get(),
TexImageTarget::CubeMapPositiveX |
TexImageTarget::CubeMapNegativeX |
TexImageTarget::CubeMapPositiveY |
TexImageTarget::CubeMapNegativeY |
TexImageTarget::CubeMapPositiveZ |
TexImageTarget::CubeMapNegativeZ => binding.bound_texture_cube_map.get(),
}
})
}
pub fn borrow_bound_attrib_buffers(&self) -> Ref<FnvHashMap<u32, Dom<WebGLBuffer>>> {
self.bound_attrib_buffers.borrow()
}
pub fn set_bound_attrib_buffers<'a, T>(&self, iter: T) where T: Iterator<Item=(u32, &'a WebGLBuffer)> {
*self.bound_attrib_buffers.borrow_mut() = FnvHashMap::from_iter(iter.map(|(k,v)| (k, Dom::from_ref(v))));
}
pub fn bound_buffer_element_array(&self) -> Option<DomRoot<WebGLBuffer>> {
self.bound_buffer_element_array.get()
}
pub fn set_bound_buffer_element_array(&self, buffer: Option<&WebGLBuffer>) {
self.bound_buffer_element_array.set(buffer);
}
pub fn recreate(&self, size: Size2D<i32>) {
let (sender, receiver) = webgl_channel().unwrap();
self.webgl_sender.send_resize(size, sender).unwrap();
if let Err(msg) = receiver.recv().unwrap() {
error!("Error resizing WebGLContext: {}", msg);
return;
};
// ClearColor needs to be restored because after a resize the GLContext is recreated
// and the framebuffer is cleared using the default black transparent color.
let color = self.current_clear_color.get();
self.send_command(WebGLCommand::ClearColor(color.0, color.1, color.2, color.3));
// WebGL Spec: Scissor rect must not change if the canvas is resized.
// See: webgl/conformance-1.0.3/conformance/rendering/gl-scissor-canvas-dimensions.html
// NativeContext handling library changes the scissor after a resize, so we need to reset the
// default scissor when the canvas was created or the last scissor that the user set.
let rect = self.current_scissor.get();
self.send_command(WebGLCommand::Scissor(rect.0, rect.1, rect.2, rect.3));
// Bound texture must not change when the canvas is resized.
// Right now offscreen_gl_context generates a new FBO and the bound texture is changed
// in order to create a new render to texture attachment.
// Send a command to re-bind the TEXTURE_2D, if any.
if let Some(texture) = self.bound_texture(constants::TEXTURE_2D) {
self.send_command(WebGLCommand::BindTexture(constants::TEXTURE_2D, Some(texture.id())));
}
// Bound framebuffer must not change when the canvas is resized.
// Right now offscreen_gl_context generates a new FBO on resize.
// Send a command to re-bind the framebuffer, if any.
if let Some(fbo) = self.bound_framebuffer.get() {
let id = WebGLFramebufferBindingRequest::Explicit(fbo.id());
self.send_command(WebGLCommand::BindFramebuffer(constants::FRAMEBUFFER, id));
}
}
pub fn webgl_sender(&self) -> WebGLMsgSender {
self.webgl_sender.clone()
}
#[inline]
pub fn send_command(&self, command: WebGLCommand) {
self.webgl_sender.send(command).unwrap();
}
#[inline]
pub fn send_vr_command(&self, command: WebVRCommand) {
self.webgl_sender.send_vr(command).unwrap();
}
pub fn get_extension_manager<'a>(&'a self) -> &'a WebGLExtensions {
&self.extension_manager
}
pub fn webgl_error(&self, err: WebGLError) {
// TODO(emilio): Add useful debug messages to this
warn!("WebGL error: {:?}, previous error was {:?}", err, self.last_error.get());
// If an error has been detected no further errors must be
// recorded until `getError` has been called
if self.last_error.get().is_none() {
self.last_error.set(Some(err));
}
}
// Helper function for validating framebuffer completeness in
// calls touching the framebuffer. From the GLES 2.0.25 spec,
// page 119:
//
// "Effects of Framebuffer Completeness on Framebuffer
// Operations
//
// If the currently bound framebuffer is not framebuffer
// complete, then it is an error to attempt to use the
// framebuffer for writing or reading. This means that
// rendering commands such as DrawArrays and DrawElements, as
// well as commands that read the framebuffer such as
// ReadPixels and CopyTexSubImage, will generate the error
// INVALID_FRAMEBUFFER_OPERATION if called while the
// framebuffer is not framebuffer complete."
//
// The WebGL spec mentions a couple more operations that trigger
// this: clear() and getParameter(IMPLEMENTATION_COLOR_READ_*).
fn validate_framebuffer_complete(&self) -> bool {
match self.bound_framebuffer.get() {
Some(fb) => match fb.check_status() {
constants::FRAMEBUFFER_COMPLETE => return true,
_ => {
self.webgl_error(InvalidFramebufferOperation);
return false;
}
},
// The default framebuffer is always complete.
None => return true,
}
}
fn tex_parameter(&self, target: u32, name: u32, value: TexParameterValue) {
let texture = match target {
constants::TEXTURE_2D |
constants::TEXTURE_CUBE_MAP => self.bound_texture(target),
_ => return self.webgl_error(InvalidEnum),
};
if let Some(texture) = texture {
handle_potential_webgl_error!(self, texture.tex_parameter(target, name, value));
// Validate non filterable TEXTURE_2D data_types
if target != constants::TEXTURE_2D {
return;
}
let target = TexImageTarget::Texture2D;
let info = texture.image_info_for_target(&target, 0);
if info.is_initialized() {
self.validate_filterable_texture(&texture,
target,
0,
info.internal_format().unwrap_or(TexFormat::RGBA),
info.width(),
info.height(),
info.data_type().unwrap_or(TexDataType::UnsignedByte));
}
} else {
self.webgl_error(InvalidOperation)
}
}
fn mark_as_dirty(&self) {
self.canvas.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
}
fn vertex_attrib(&self, indx: u32, x: f32, y: f32, z: f32, w: f32) {
if indx > self.limits.max_vertex_attribs {
return self.webgl_error(InvalidValue);
}
if indx == 0 {
self.current_vertex_attrib_0.set((x, y, z, w))
}
self.send_command(WebGLCommand::VertexAttrib(indx, x, y, z, w));
}
fn get_current_framebuffer_size(&self) -> Option<(i32, i32)> {
match self.bound_framebuffer.get() {
Some(fb) => return fb.size(),
// The window system framebuffer is bound
None => return Some((self.DrawingBufferWidth(),
self.DrawingBufferHeight())),
}
}
// LINEAR filtering may be forbidden when using WebGL extensions.
// https://www.khronos.org/registry/webgl/extensions/OES_texture_float_linear/
fn validate_filterable_texture(&self,
texture: &WebGLTexture,
target: TexImageTarget,
level: u32,
format: TexFormat,
width: u32,
height: u32,
data_type: TexDataType)
-> bool
{
if self.extension_manager.is_filterable(data_type.as_gl_constant()) || !texture.is_using_linear_filtering() {
return true;
}
// Handle validation failed: LINEAR filtering not valid for this texture
// WebGL Conformance tests expect to fallback to [0, 0, 0, 255] RGBA UNSIGNED_BYTE
let data_type = TexDataType::UnsignedByte;
let expected_byte_length = width * height * 4;
let mut pixels = vec![0u8; expected_byte_length as usize];
for rgba8 in pixels.chunks_mut(4) {
rgba8[3] = 255u8;
}
let pixels = self.prepare_pixels(format, data_type, width, height, 1, true, true, pixels);
self.tex_image_2d(texture, target, data_type, format, level, width, height, 0, 1, pixels);
false
}
fn validate_stencil_actions(&self, action: u32) -> bool {
match action {
0 | constants::KEEP | constants::REPLACE | constants::INCR | constants::DECR |
constants::INVERT | constants::INCR_WRAP | constants::DECR_WRAP => true,
_ => false,
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
// https://www.khronos.org/opengles/sdk/docs/man/xhtml/glUniform.xml
// https://www.khronos.org/registry/gles/specs/2.0/es_full_spec_2.0.25.pdf#nameddest=section-2.10.4
fn validate_uniform_parameters<T>(&self,
uniform: Option<&WebGLUniformLocation>,
uniform_type: UniformSetterType,
data: &[T]) -> bool {
let uniform = match uniform {
Some(uniform) => uniform,
None => return false,
};
let program = self.current_program.get();
match program {
Some(ref program) if program.id() == uniform.program_id() => {},
_ => {
self.webgl_error(InvalidOperation);
return false;
},
};
// TODO(emilio): Get more complex uniform info from ANGLE, and use it to
// properly validate that the uniform setter type is compatible with the
// uniform type, and that the uniform size matches.
if data.len() % uniform_type.element_count() != 0 {
self.webgl_error(InvalidOperation);
return false;
}
true
}
// https://en.wikipedia.org/wiki/Relative_luminance
#[inline]
fn luminance(r: u8, g: u8, b: u8) -> u8 {
(0.2126 * (r as f32) +
0.7152 * (g as f32) +
0.0722 * (b as f32)) as u8
}
/// Translates an image in rgba8 (red in the first byte) format to
/// the format that was requested of TexImage.
///
/// From the WebGL 1.0 spec, 5.14.8:
///
/// "The source image data is conceptually first converted to
/// the data type and format specified by the format and type
/// arguments, and then transferred to the WebGL
/// implementation. If a packed pixel format is specified
/// which would imply loss of bits of precision from the image
/// data, this loss of precision must occur."
fn rgba8_image_to_tex_image_data(&self,
format: TexFormat,
data_type: TexDataType,
pixels: Vec<u8>) -> Vec<u8> {
// hint for vector allocation sizing.
let pixel_count = pixels.len() / 4;
match (format, data_type) {
(TexFormat::RGBA, TexDataType::UnsignedByte) => pixels,
(TexFormat::RGB, TexDataType::UnsignedByte) => {
// Remove alpha channel
let mut rgb8 = Vec::<u8>::with_capacity(pixel_count * 3);
for rgba8 in pixels.chunks(4) {
rgb8.push(rgba8[0]);
rgb8.push(rgba8[1]);
rgb8.push(rgba8[2]);
}
rgb8
},
(TexFormat::Alpha, TexDataType::UnsignedByte) => {
let mut alpha = Vec::<u8>::with_capacity(pixel_count);
for rgba8 in pixels.chunks(4) {
alpha.push(rgba8[3]);
}
alpha
},
(TexFormat::Luminance, TexDataType::UnsignedByte) => {
let mut luminance = Vec::<u8>::with_capacity(pixel_count);
for rgba8 in pixels.chunks(4) {
luminance.push(Self::luminance(rgba8[0], rgba8[1], rgba8[2]));
}
luminance
},
(TexFormat::LuminanceAlpha, TexDataType::UnsignedByte) => {
let mut data = Vec::<u8>::with_capacity(pixel_count * 2);
for rgba8 in pixels.chunks(4) {
data.push(Self::luminance(rgba8[0], rgba8[1], rgba8[2]));
data.push(rgba8[3]);
}
data
},
(TexFormat::RGBA, TexDataType::UnsignedShort4444) => {
let mut rgba4 = Vec::<u8>::with_capacity(pixel_count * 2);
for rgba8 in pixels.chunks(4) {
rgba4.write_u16::<NativeEndian>((rgba8[0] as u16 & 0xf0) << 8 |
(rgba8[1] as u16 & 0xf0) << 4 |
(rgba8[2] as u16 & 0xf0) |
(rgba8[3] as u16 & 0xf0) >> 4).unwrap();
}
rgba4
}
(TexFormat::RGBA, TexDataType::UnsignedShort5551) => {
let mut rgba5551 = Vec::<u8>::with_capacity(pixel_count * 2);
for rgba8 in pixels.chunks(4) {
rgba5551.write_u16::<NativeEndian>((rgba8[0] as u16 & 0xf8) << 8 |
(rgba8[1] as u16 & 0xf8) << 3 |
(rgba8[2] as u16 & 0xf8) >> 2 |
(rgba8[3] as u16) >> 7).unwrap();
}
rgba5551
}
(TexFormat::RGB, TexDataType::UnsignedShort565) => {
let mut rgb565 = Vec::<u8>::with_capacity(pixel_count * 2);
for rgba8 in pixels.chunks(4) {
rgb565.write_u16::<NativeEndian>((rgba8[0] as u16 & 0xf8) << 8 |
(rgba8[1] as u16 & 0xfc) << 3 |
(rgba8[2] as u16 & 0xf8) >> 3).unwrap();
}
rgb565
}
(TexFormat::RGBA, TexDataType::Float) => {
let mut rgbaf32 = Vec::<u8>::with_capacity(pixel_count * 16);
for rgba8 in pixels.chunks(4) {
rgbaf32.write_f32::<NativeEndian>(rgba8[0] as f32).unwrap();
rgbaf32.write_f32::<NativeEndian>(rgba8[1] as f32).unwrap();
rgbaf32.write_f32::<NativeEndian>(rgba8[2] as f32).unwrap();
rgbaf32.write_f32::<NativeEndian>(rgba8[3] as f32).unwrap();
}
rgbaf32
}
(TexFormat::RGB, TexDataType::Float) => {
let mut rgbf32 = Vec::<u8>::with_capacity(pixel_count * 12);
for rgba8 in pixels.chunks(4) {
rgbf32.write_f32::<NativeEndian>(rgba8[0] as f32).unwrap();
rgbf32.write_f32::<NativeEndian>(rgba8[1] as f32).unwrap();
rgbf32.write_f32::<NativeEndian>(rgba8[2] as f32).unwrap();
}
rgbf32
}
(TexFormat::Alpha, TexDataType::Float) => {
let mut alpha = Vec::<u8>::with_capacity(pixel_count * 4);
for rgba8 in pixels.chunks(4) {
alpha.write_f32::<NativeEndian>(rgba8[0] as f32).unwrap();
}
alpha
},
(TexFormat::Luminance, TexDataType::Float) => {
let mut luminance = Vec::<u8>::with_capacity(pixel_count * 4);
for rgba8 in pixels.chunks(4) {
let p = Self::luminance(rgba8[0], rgba8[1], rgba8[2]);
luminance.write_f32::<NativeEndian>(p as f32).unwrap();
}
luminance
},
(TexFormat::LuminanceAlpha, TexDataType::Float) => {
let mut data = Vec::<u8>::with_capacity(pixel_count * 8);
for rgba8 in pixels.chunks(4) {
let p = Self::luminance(rgba8[0], rgba8[1], rgba8[2]);
data.write_f32::<NativeEndian>(p as f32).unwrap();
data.write_f32::<NativeEndian>(rgba8[3] as f32).unwrap();
}
data
},
(TexFormat::RGBA, TexDataType::HalfFloat) => {
let mut rgbaf16 = Vec::<u8>::with_capacity(pixel_count * 8);
for rgba8 in pixels.chunks(4) {
rgbaf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[0] as f32).as_bits()).unwrap();
rgbaf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[1] as f32).as_bits()).unwrap();
rgbaf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[2] as f32).as_bits()).unwrap();
rgbaf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[3] as f32).as_bits()).unwrap();
}
rgbaf16
},
(TexFormat::RGB, TexDataType::HalfFloat) => {
let mut rgbf16 = Vec::<u8>::with_capacity(pixel_count * 6);
for rgba8 in pixels.chunks(4) {
rgbf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[0] as f32).as_bits()).unwrap();
rgbf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[1] as f32).as_bits()).unwrap();
rgbf16.write_u16::<NativeEndian>(f16::from_f32(rgba8[2] as f32).as_bits()).unwrap();
}
rgbf16
},
(TexFormat::Alpha, TexDataType::HalfFloat) => {
let mut alpha = Vec::<u8>::with_capacity(pixel_count * 2);
for rgba8 in pixels.chunks(4) {
alpha.write_u16::<NativeEndian>(f16::from_f32(rgba8[3] as f32).as_bits()).unwrap();
}
alpha
},
(TexFormat::Luminance, TexDataType::HalfFloat) => {
let mut luminance = Vec::<u8>::with_capacity(pixel_count * 4);
for rgba8 in pixels.chunks(4) {
let p = Self::luminance(rgba8[0], rgba8[1], rgba8[2]);
luminance.write_u16::<NativeEndian>(f16::from_f32(p as f32).as_bits()).unwrap();
}
luminance
},
(TexFormat::LuminanceAlpha, TexDataType::HalfFloat) => {
let mut data = Vec::<u8>::with_capacity(pixel_count * 8);
for rgba8 in pixels.chunks(4) {
let p = Self::luminance(rgba8[0], rgba8[1], rgba8[2]);
data.write_u16::<NativeEndian>(f16::from_f32(p as f32).as_bits()).unwrap();
data.write_u16::<NativeEndian>(f16::from_f32(rgba8[3] as f32).as_bits()).unwrap();
}
data
},
// Validation should have ensured that we only hit the
// above cases, but we haven't turned the (format, type)
// into an enum yet so there's a default case here.
_ => unreachable!("Unsupported formats {:?} {:?}", format, data_type)
}
}
fn get_image_pixels(&self,
source: Option<ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement>)
-> ImagePixelResult {
let source = match source {
Some(s) => s,
None => return Err(()),
};
// NOTE: Getting the pixels probably can be short-circuited if some
// parameter is invalid.
//
// Nontheless, since it's the error case, I'm not totally sure the
// complexity is worth it.
let (pixels, size, premultiplied) = match source {
ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement::ImageData(image_data) => {
(image_data.get_data_array(), image_data.get_size(), false)
},
ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement::HTMLImageElement(image) => {
let img_url = match image.get_url() {
Some(url) => url,
None => return Err(()),
};
let window = window_from_node(&*self.canvas);
let img = match canvas_utils::request_image_from_cache(&window, img_url) {
ImageResponse::Loaded(img, _) => img,
ImageResponse::PlaceholderLoaded(_, _) | ImageResponse::None |
ImageResponse::MetadataLoaded(_)
=> return Err(()),
};
let size = Size2D::new(img.width as i32, img.height as i32);
// For now Servo's images are all stored as BGRA8 internally.
let mut data = match img.format {
PixelFormat::BGRA8 => img.bytes.to_vec(),
_ => unimplemented!(),
};
byte_swap(&mut data);
(data, size, false)
},
// TODO(emilio): Getting canvas data is implemented in CanvasRenderingContext2D,
// but we need to refactor it moving it to `HTMLCanvasElement` and support
// WebGLContext (probably via GetPixels()).
ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement::HTMLCanvasElement(canvas) => {
if let Some((mut data, size)) = canvas.fetch_all_data() {
// Pixels got from Canvas have already alpha premultiplied
byte_swap(&mut data);
(data, size, true)
} else {
return Err(());
}
},
ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement::HTMLVideoElement(_rooted_video)
=> unimplemented!(),
};
return Ok((pixels, size, premultiplied));
}
// TODO(emilio): Move this logic to a validator.
#[allow(unsafe_code)]
unsafe fn validate_tex_image_2d_data(&self,
width: u32,
height: u32,
format: TexFormat,
data_type: TexDataType,
unpacking_alignment: u32,
data: *mut JSObject,
cx: *mut JSContext)
-> Result<u32, ()> {
let element_size = data_type.element_size();
let components_per_element = data_type.components_per_element();
let components = format.components();
// If data is non-null, the type of pixels must match the type of the
// data to be read.
// If it is UNSIGNED_BYTE, a Uint8Array must be supplied;
// if it is UNSIGNED_SHORT_5_6_5, UNSIGNED_SHORT_4_4_4_4,
// or UNSIGNED_SHORT_5_5_5_1, a Uint16Array must be supplied.
// or FLOAT, a Float32Array must be supplied.
// If the types do not match, an INVALID_OPERATION error is generated.
typedarray!(in(cx) let typedarray_u8: Uint8Array = data);
typedarray!(in(cx) let typedarray_u16: Uint16Array = data);
typedarray!(in(cx) let typedarray_f32: Float32Array = data);
let received_size = if data.is_null() {
element_size
} else {
if typedarray_u16.is_ok() {
2
} else if typedarray_u8.is_ok() {
1
} else if typedarray_f32.is_ok() {
4
} else {
self.webgl_error(InvalidOperation);
return Err(());
}
};
if received_size != element_size {
self.webgl_error(InvalidOperation);
return Err(());
}
// NOTE: width and height are positive or zero due to validate()
if height == 0 {
return Ok(0);
} else {
// We need to be careful here to not count unpack
// alignment at the end of the image, otherwise (for
// example) passing a single byte for uploading a 1x1
// GL_ALPHA/GL_UNSIGNED_BYTE texture would throw an error.
let cpp = element_size * components / components_per_element;
let stride = (width * cpp + unpacking_alignment - 1) & !(unpacking_alignment - 1);
return Ok(stride * (height - 1) + width * cpp);
}
}
/// Flips the pixels in the Vec on the Y axis if
/// UNPACK_FLIP_Y_WEBGL is currently enabled.
fn flip_teximage_y(&self,
pixels: Vec<u8>,
internal_format: TexFormat,
data_type: TexDataType,
width: usize,
height: usize,
unpacking_alignment: usize) -> Vec<u8> {
if !self.texture_unpacking_settings.get().contains(TextureUnpacking::FLIP_Y_AXIS) {
return pixels;
}
let cpp = (data_type.element_size() *
internal_format.components() / data_type.components_per_element()) as usize;
let stride = (width * cpp + unpacking_alignment - 1) & !(unpacking_alignment - 1);
let mut flipped = Vec::<u8>::with_capacity(pixels.len());
for y in 0..height {
let flipped_y = height - 1 - y;
let start = flipped_y * stride;
flipped.extend_from_slice(&pixels[start..(start + width * cpp)]);
flipped.extend(vec![0u8; stride - width * cpp]);
}
flipped
}
/// Performs premultiplication of the pixels if
/// UNPACK_PREMULTIPLY_ALPHA_WEBGL is currently enabled.
fn premultiply_pixels(&self,
format: TexFormat,
data_type: TexDataType,
pixels: Vec<u8>) -> Vec<u8> {
if !self.texture_unpacking_settings.get().contains(TextureUnpacking::PREMULTIPLY_ALPHA) {
return pixels;
}
match (format, data_type) {
(TexFormat::RGBA, TexDataType::UnsignedByte) => {
let mut premul = Vec::<u8>::with_capacity(pixels.len());
for rgba in pixels.chunks(4) {
premul.push(multiply_u8_pixel(rgba[0], rgba[3]));
premul.push(multiply_u8_pixel(rgba[1], rgba[3]));
premul.push(multiply_u8_pixel(rgba[2], rgba[3]));
premul.push(rgba[3]);
}
premul
}
(TexFormat::LuminanceAlpha, TexDataType::UnsignedByte) => {
let mut premul = Vec::<u8>::with_capacity(pixels.len());
for la in pixels.chunks(2) {
premul.push(multiply_u8_pixel(la[0], la[1]));
premul.push(la[1]);
}
premul
}
(TexFormat::RGBA, TexDataType::UnsignedShort5551) => {
let mut premul = Vec::<u8>::with_capacity(pixels.len());
for mut rgba in pixels.chunks(2) {
let pix = rgba.read_u16::<NativeEndian>().unwrap();
if pix & (1 << 15) != 0 {
premul.write_u16::<NativeEndian>(pix).unwrap();
} else {
premul.write_u16::<NativeEndian>(0).unwrap();
}
}
premul
}
(TexFormat::RGBA, TexDataType::UnsignedShort4444) => {
let mut premul = Vec::<u8>::with_capacity(pixels.len());
for mut rgba in pixels.chunks(2) {
let pix = rgba.read_u16::<NativeEndian>().unwrap();
let extend_to_8_bits = |val| { (val | val << 4) as u8 };
let r = extend_to_8_bits(pix & 0x000f);
let g = extend_to_8_bits((pix & 0x00f0) >> 4);
let b = extend_to_8_bits((pix & 0x0f00) >> 8);
let a = extend_to_8_bits((pix & 0xf000) >> 12);
premul.write_u16::<NativeEndian>((multiply_u8_pixel(r, a) & 0xf0) as u16 >> 4 |
(multiply_u8_pixel(g, a) & 0xf0) as u16 |
((multiply_u8_pixel(b, a) & 0xf0) as u16) << 4 |
pix & 0xf000).unwrap();
}
premul
}
// Other formats don't have alpha, so return their data untouched.
_ => pixels
}
}
// Remove premultiplied alpha.
// This is only called when texImage2D is called using a canvas2d source and
// UNPACK_PREMULTIPLY_ALPHA_WEBGL is disabled. Pixels got from a canvas2D source
// are always RGBA8 with premultiplied alpha, so we don't have to worry about
// additional formats as happens in the premultiply_pixels method.
fn remove_premultiplied_alpha(&self, mut pixels: Vec<u8>) -> Vec<u8> {
for rgba in pixels.chunks_mut(4) {
let a = (rgba[3] as f32) / 255.0;
rgba[0] = (rgba[0] as f32 / a) as u8;
rgba[1] = (rgba[1] as f32 / a) as u8;
rgba[2] = (rgba[2] as f32 / a) as u8;
}
pixels
}
fn prepare_pixels(&self,
internal_format: TexFormat,
data_type: TexDataType,
width: u32,
height: u32,
unpacking_alignment: u32,
source_premultiplied: bool,
source_from_image_or_canvas: bool,
mut pixels: Vec<u8>) -> Vec<u8> {
let dest_premultiply = self.texture_unpacking_settings.get().contains(TextureUnpacking::PREMULTIPLY_ALPHA);
if !source_premultiplied && dest_premultiply {
if source_from_image_or_canvas {
// When the pixels come from image or canvas or imagedata, use RGBA8 format
pixels = self.premultiply_pixels(TexFormat::RGBA, TexDataType::UnsignedByte, pixels);
} else {
pixels = self.premultiply_pixels(internal_format, data_type, pixels);
}
} else if source_premultiplied && !dest_premultiply {
pixels = self.remove_premultiplied_alpha(pixels);
}
if source_from_image_or_canvas {
pixels = self.rgba8_image_to_tex_image_data(internal_format, data_type, pixels);
}
// FINISHME: Consider doing premultiply and flip in a single mutable Vec.
self.flip_teximage_y(pixels, internal_format, data_type,
width as usize, height as usize, unpacking_alignment as usize)
}
fn tex_image_2d(&self,
texture: &WebGLTexture,
target: TexImageTarget,
data_type: TexDataType,
internal_format: TexFormat,
level: u32,
width: u32,
height: u32,
_border: u32,
unpacking_alignment: u32,
pixels: Vec<u8>) { // NB: pixels should NOT be premultipied
// TexImage2D depth is always equal to 1
handle_potential_webgl_error!(self, texture.initialize(target,
width,
height, 1,
internal_format,
level,
Some(data_type)));
// Set the unpack alignment. For textures coming from arrays,
// this will be the current value of the context's
// GL_UNPACK_ALIGNMENT, while for textures from images or
// canvas (produced by rgba8_image_to_tex_image_data()), it
// will be 1.
self.send_command(WebGLCommand::PixelStorei(constants::UNPACK_ALIGNMENT, unpacking_alignment as i32));
let format = internal_format.as_gl_constant();
let data_type = data_type.as_gl_constant();
let internal_format = self.extension_manager.get_effective_tex_internal_format(format, data_type);
// TODO(emilio): convert colorspace if requested
let msg = WebGLCommand::TexImage2D(target.as_gl_constant(), level as i32,
internal_format as i32,
width as i32, height as i32,
format,
data_type,
pixels);
self.send_command(msg);
if let Some(fb) = self.bound_framebuffer.get() {
fb.invalidate_texture(&*texture);
}
}
fn tex_sub_image_2d(&self,
texture: DomRoot<WebGLTexture>,
target: TexImageTarget,
level: u32,
xoffset: i32,
yoffset: i32,
width: u32,
height: u32,
format: TexFormat,
data_type: TexDataType,
unpacking_alignment: u32,
pixels: Vec<u8>) {
// We have already validated level
let image_info = texture.image_info_for_target(&target, level);
// GL_INVALID_VALUE is generated if:
// - xoffset or yoffset is less than 0
// - x offset plus the width is greater than the texture width
// - y offset plus the height is greater than the texture height
if xoffset < 0 || (xoffset as u32 + width) > image_info.width() ||
yoffset < 0 || (yoffset as u32 + height) > image_info.height() {
return self.webgl_error(InvalidValue);
}
// NB: format and internal_format must match.
if format != image_info.internal_format().unwrap() ||
data_type != image_info.data_type().unwrap() {
return self.webgl_error(InvalidOperation);
}
// Set the unpack alignment. For textures coming from arrays,
// this will be the current value of the context's
// GL_UNPACK_ALIGNMENT, while for textures from images or
// canvas (produced by rgba8_image_to_tex_image_data()), it
// will be 1.
self.send_command(WebGLCommand::PixelStorei(constants::UNPACK_ALIGNMENT, unpacking_alignment as i32));
// TODO(emilio): convert colorspace if requested
let msg = WebGLCommand::TexSubImage2D(target.as_gl_constant(),
level as i32, xoffset, yoffset,
width as i32, height as i32,
format.as_gl_constant(),
data_type.as_gl_constant(), pixels);
self.send_command(msg);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14
fn validate_feature_enum(&self, cap: u32) -> bool {
match cap {
constants::BLEND | constants::CULL_FACE | constants::DEPTH_TEST | constants::DITHER |
constants::POLYGON_OFFSET_FILL | constants::SAMPLE_ALPHA_TO_COVERAGE | constants::SAMPLE_COVERAGE |
constants::SAMPLE_COVERAGE_INVERT | constants::SCISSOR_TEST | constants::STENCIL_TEST => true,
_ => {
self.webgl_error(InvalidEnum);
false
},
}
}
fn get_gl_extensions(&self) -> String {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetExtensions(sender));
receiver.recv().unwrap()
}
pub fn layout_handle(&self) -> webrender_api::ImageKey {
match self.share_mode {
WebGLContextShareMode::SharedTexture => {
// WR using ExternalTexture requires a single update message.
self.webrender_image.get().unwrap_or_else(|| {
let (sender, receiver) = webgl_channel().unwrap();
self.webgl_sender.send_update_wr_image(sender).unwrap();
let image_key = receiver.recv().unwrap();
self.webrender_image.set(Some(image_key));
image_key
})
},
WebGLContextShareMode::Readback => {
// WR using Readback requires to update WR image every frame
// in order to send the new raw pixels.
let (sender, receiver) = webgl_channel().unwrap();
self.webgl_sender.send_update_wr_image(sender).unwrap();
receiver.recv().unwrap()
}
}
}
}
impl Drop for WebGLRenderingContext {
fn drop(&mut self) {
self.webgl_sender.send_remove().unwrap();
}
}
// FIXME: After [1] lands and the relevant Servo and codegen PR too, we should
// convert all our raw JSObject pointers to proper types.
//
// [1]: https://github.com/servo/rust-mozjs/pull/304
#[allow(unsafe_code)]
unsafe fn typed_array_or_sequence_to_vec<T>(cx: *mut JSContext,
sequence_or_abv: *mut JSObject,
config: <T::Element as FromJSValConvertible>::Config)
-> Result<Vec<T::Element>, Error>
where T: TypedArrayElement,
T::Element: FromJSValConvertible + Clone,
<T::Element as FromJSValConvertible>::Config: Clone,
{
// TODO(servo/rust-mozjs#330): replace this with a macro that supports generic types.
let typed_array: Option<TypedArray<T, *mut JSObject>> =
TypedArray::from(sequence_or_abv).ok();
if let Some(mut typed_array) = typed_array {
return Ok(typed_array.as_slice().to_vec());
}
assert!(!sequence_or_abv.is_null());
rooted!(in(cx) let mut val = UndefinedValue());
sequence_or_abv.to_jsval(cx, val.handle_mut());
match Vec::<T::Element>::from_jsval(cx, val.handle(), config) {
Ok(ConversionResult::Success(v)) => Ok(v),
Ok(ConversionResult::Failure(error)) => Err(Error::Type(error.into_owned())),
// FIXME: What to do here? Generated code only aborts the execution of
// the script.
Err(err) => panic!("unexpected conversion error: {:?}", err),
}
}
#[allow(unsafe_code)]
unsafe fn fallible_array_buffer_view_to_vec(cx: *mut JSContext, abv: *mut JSObject) -> Result<Vec<u8>, Error>
{
assert!(!abv.is_null());
typedarray!(in(cx) let array_buffer_view: ArrayBufferView = abv);
match array_buffer_view {
Ok(mut v) => Ok(v.as_slice().to_vec()),
Err(_) => Err(Error::Type("Not an ArrayBufferView".to_owned())),
}
}
impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.1
fn Canvas(&self) -> DomRoot<HTMLCanvasElement> {
DomRoot::from_ref(&*self.canvas)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn Flush(&self) {
self.send_command(WebGLCommand::Flush);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn Finish(&self) {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::Finish(sender));
receiver.recv().unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.1
fn DrawingBufferWidth(&self) -> i32 {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::DrawingBufferWidth(sender));
receiver.recv().unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.1
fn DrawingBufferHeight(&self) -> i32 {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::DrawingBufferHeight(sender));
receiver.recv().unwrap()
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
unsafe fn GetBufferParameter(&self, _cx: *mut JSContext, target: u32, parameter: u32) -> JSVal {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetBufferParameter(target, parameter, sender));
match handle_potential_webgl_error!(self, receiver.recv().unwrap(), WebGLParameter::Invalid) {
WebGLParameter::Int(val) => Int32Value(val),
WebGLParameter::Bool(_) => panic!("Buffer parameter should not be bool"),
WebGLParameter::Float(_) => panic!("Buffer parameter should not be float"),
WebGLParameter::FloatArray(_) => panic!("Buffer parameter should not be float array"),
WebGLParameter::String(_) => panic!("Buffer parameter should not be string"),
WebGLParameter::Invalid => NullValue(),
}
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
unsafe fn GetParameter(&self, cx: *mut JSContext, parameter: u32) -> JSVal {
// Handle the GL_*_BINDING without going all the way
// to the GL, since we would just need to map back from GL's
// returned ID to the WebGL* object we're tracking.
match parameter {
constants::ARRAY_BUFFER_BINDING =>
return object_binding_to_js_or_null!(cx, &self.bound_buffer_array),
constants::ELEMENT_ARRAY_BUFFER_BINDING =>
return object_binding_to_js_or_null!(cx, &self.bound_buffer_element_array),
constants::FRAMEBUFFER_BINDING =>
return object_binding_to_js_or_null!(cx, &self.bound_framebuffer),
constants::RENDERBUFFER_BINDING =>
return object_binding_to_js_or_null!(cx, &self.bound_renderbuffer),
constants::TEXTURE_BINDING_2D => {
let texture = self.bound_texture(constants::TEXTURE_2D);
return optional_root_object_to_js_or_null!(cx, texture)
},
constants::TEXTURE_BINDING_CUBE_MAP => {
let texture = self.bound_texture(constants::TEXTURE_CUBE_MAP);
return optional_root_object_to_js_or_null!(cx, texture)
},
// In readPixels we currently support RGBA/UBYTE only. If
// we wanted to support other formats, we could ask the
// driver, but we would need to check for
// GL_OES_read_format support (assuming an underlying GLES
// driver. Desktop is happy to format convert for us).
constants::IMPLEMENTATION_COLOR_READ_FORMAT => {
if !self.validate_framebuffer_complete() {
return NullValue();
} else {
return Int32Value(constants::RGBA as i32);
}
}
constants::IMPLEMENTATION_COLOR_READ_TYPE => {
if !self.validate_framebuffer_complete() {
return NullValue();
} else {
return Int32Value(constants::UNSIGNED_BYTE as i32);
}
}
_ => {
if !self.extension_manager.is_get_parameter_name_enabled(parameter) {
self.webgl_error(WebGLError::InvalidEnum);
return NullValue();
}
}
}
// Handle GetParameter getters injected via WebGL extensions
if let Some(query_handler) = self.extension_manager.get_query_parameter_handler(parameter) {
match query_handler(cx, &self) {
Ok(value) => {
return value;
},
Err(error) => {
self.webgl_error(error);
return NullValue();
}
}
}
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetParameter(parameter, sender));
match handle_potential_webgl_error!(self, receiver.recv().unwrap(), WebGLParameter::Invalid) {
WebGLParameter::Int(val) => Int32Value(val),
WebGLParameter::Bool(val) => BooleanValue(val),
WebGLParameter::Float(val) => DoubleValue(val as f64),
WebGLParameter::FloatArray(_) => panic!("Parameter should not be float array"),
WebGLParameter::String(val) => {
rooted!(in(cx) let mut rval = UndefinedValue());
val.to_jsval(cx, rval.handle_mut());
rval.get()
}
WebGLParameter::Invalid => NullValue(),
}
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
unsafe fn GetTexParameter(&self, _cx: *mut JSContext, target: u32, pname: u32) -> JSVal {
let texture = match target {
constants::TEXTURE_2D |
constants::TEXTURE_CUBE_MAP => self.bound_texture(target),
_ => {
self.webgl_error(InvalidEnum);
return NullValue();
}
};
if texture.is_some() {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetTexParameter(target, pname, sender));
match handle_potential_webgl_error!(self, receiver.recv().unwrap(), WebGLParameter::Invalid) {
WebGLParameter::Int(val) => Int32Value(val),
WebGLParameter::Bool(_) => panic!("Texture parameter should not be bool"),
WebGLParameter::Float(_) => panic!("Texture parameter should not be float"),
WebGLParameter::FloatArray(_) => panic!("Texture parameter should not be float array"),
WebGLParameter::String(_) => panic!("Texture parameter should not be string"),
WebGLParameter::Invalid => {
self.webgl_error(InvalidEnum);
NullValue()
}
}
} else {
self.webgl_error(InvalidOperation);
NullValue()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn GetError(&self) -> u32 {
let error_code = if let Some(error) = self.last_error.get() {
match error {
WebGLError::InvalidEnum => constants::INVALID_ENUM,
WebGLError::InvalidFramebufferOperation => constants::INVALID_FRAMEBUFFER_OPERATION,
WebGLError::InvalidValue => constants::INVALID_VALUE,
WebGLError::InvalidOperation => constants::INVALID_OPERATION,
WebGLError::OutOfMemory => constants::OUT_OF_MEMORY,
WebGLError::ContextLost => constants::CONTEXT_LOST_WEBGL,
}
} else {
constants::NO_ERROR
};
self.last_error.set(None);
error_code
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.2
fn GetContextAttributes(&self) -> Option<WebGLContextAttributes> {
let (sender, receiver) = webgl_channel().unwrap();
// If the send does not succeed, assume context lost
if self.webgl_sender.send(WebGLCommand::GetContextAttributes(sender)).is_err() {
return None;
}
let attrs = receiver.recv().unwrap();
Some(WebGLContextAttributes {
alpha: attrs.alpha,
antialias: attrs.antialias,
depth: attrs.depth,
failIfMajorPerformanceCaveat: false,
preferLowPowerToHighPerformance: false,
premultipliedAlpha: attrs.premultiplied_alpha,
preserveDrawingBuffer: attrs.preserve_drawing_buffer,
stencil: attrs.stencil
})
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.14
fn GetSupportedExtensions(&self) -> Option<Vec<DOMString>> {
self.extension_manager.init_once(|| {
self.get_gl_extensions()
});
let extensions = self.extension_manager.get_suported_extensions();
Some(extensions.iter().map(|name| DOMString::from(*name)).collect())
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.14
unsafe fn GetExtension(&self, _cx: *mut JSContext, name: DOMString)
-> Option<NonNull<JSObject>> {
self.extension_manager.init_once(|| {
self.get_gl_extensions()
});
self.extension_manager.get_or_init_extension(&name, self)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ActiveTexture(&self, texture: u32) {
self.bound_texture_unit.set(texture);
self.send_command(WebGLCommand::ActiveTexture(texture));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendColor(&self, r: f32, g: f32, b: f32, a: f32) {
self.send_command(WebGLCommand::BlendColor(r, g, b, a));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendEquation(&self, mode: u32) {
if mode != constants::FUNC_ADD {
return self.webgl_error(InvalidEnum);
}
self.send_command(WebGLCommand::BlendEquation(mode));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendEquationSeparate(&self, mode_rgb: u32, mode_alpha: u32) {
if mode_rgb != constants::FUNC_ADD || mode_alpha != constants::FUNC_ADD {
return self.webgl_error(InvalidEnum);
}
self.send_command(WebGLCommand::BlendEquationSeparate(mode_rgb, mode_alpha));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendFunc(&self, src_factor: u32, dest_factor: u32) {
// From the WebGL 1.0 spec, 6.13: Viewport Depth Range:
//
// A call to blendFunc will generate an INVALID_OPERATION error if one of the two
// factors is set to CONSTANT_COLOR or ONE_MINUS_CONSTANT_COLOR and the other to
// CONSTANT_ALPHA or ONE_MINUS_CONSTANT_ALPHA.
if has_invalid_blend_constants(src_factor, dest_factor) {
return self.webgl_error(InvalidOperation);
}
if has_invalid_blend_constants(dest_factor, src_factor) {
return self.webgl_error(InvalidOperation);
}
self.send_command(WebGLCommand::BlendFunc(src_factor, dest_factor));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendFuncSeparate(&self, src_rgb: u32, dest_rgb: u32, src_alpha: u32, dest_alpha: u32) {
// From the WebGL 1.0 spec, 6.13: Viewport Depth Range:
//
// A call to blendFuncSeparate will generate an INVALID_OPERATION error if srcRGB is
// set to CONSTANT_COLOR or ONE_MINUS_CONSTANT_COLOR and dstRGB is set to
// CONSTANT_ALPHA or ONE_MINUS_CONSTANT_ALPHA or vice versa.
if has_invalid_blend_constants(src_rgb, dest_rgb) {
return self.webgl_error(InvalidOperation);
}
if has_invalid_blend_constants(dest_rgb, src_rgb) {
return self.webgl_error(InvalidOperation);
}
self.send_command(WebGLCommand::BlendFuncSeparate(src_rgb, dest_rgb, src_alpha, dest_alpha));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn AttachShader(&self, program: Option<&WebGLProgram>, shader: Option<&WebGLShader>) {
if let Some(program) = program {
if let Some(shader) = shader {
handle_potential_webgl_error!(self, program.attach_shader(shader));
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn DetachShader(&self, program: Option<&WebGLProgram>, shader: Option<&WebGLShader>) {
if let Some(program) = program {
if let Some(shader) = shader {
handle_potential_webgl_error!(self, program.detach_shader(shader));
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn BindAttribLocation(&self, program: Option<&WebGLProgram>,
index: u32, name: DOMString) {
if let Some(program) = program {
handle_potential_webgl_error!(self, program.bind_attrib_location(index, name));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn BindBuffer(&self, target: u32, buffer: Option<&WebGLBuffer>) {
let slot = match target {
constants::ARRAY_BUFFER => &self.bound_buffer_array,
constants::ELEMENT_ARRAY_BUFFER => &self.bound_buffer_element_array,
_ => return self.webgl_error(InvalidEnum),
};
if let Some(buffer) = buffer {
match buffer.bind(target) {
Ok(_) => slot.set(Some(buffer)),
Err(e) => return self.webgl_error(e),
}
} else {
slot.set(None);
// Unbind the current buffer
self.send_command(WebGLCommand::BindBuffer(target, None));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn BindFramebuffer(&self, target: u32, framebuffer: Option<&WebGLFramebuffer>) {
if target != constants::FRAMEBUFFER {
return self.webgl_error(InvalidOperation);
}
if let Some(framebuffer) = framebuffer {
if framebuffer.is_deleted() {
// From the WebGL spec:
//
// "An attempt to bind a deleted framebuffer will
// generate an INVALID_OPERATION error, and the
// current binding will remain untouched."
return self.webgl_error(InvalidOperation);
} else {
framebuffer.bind(target);
self.bound_framebuffer.set(Some(framebuffer));
}
} else {
// Bind the default framebuffer
let cmd = WebGLCommand::BindFramebuffer(target, WebGLFramebufferBindingRequest::Default);
self.send_command(cmd);
self.bound_framebuffer.set(framebuffer);
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
fn BindRenderbuffer(&self, target: u32, renderbuffer: Option<&WebGLRenderbuffer>) {
if target != constants::RENDERBUFFER {
return self.webgl_error(InvalidEnum);
}
match renderbuffer {
// Implementations differ on what to do in the deleted
// case: Chromium currently unbinds, and Gecko silently
// returns. The conformance tests don't cover this case.
Some(renderbuffer) if !renderbuffer.is_deleted() => {
self.bound_renderbuffer.set(Some(renderbuffer));
renderbuffer.bind(target);
}
_ => {
self.bound_renderbuffer.set(None);
// Unbind the currently bound renderbuffer
self.send_command(WebGLCommand::BindRenderbuffer(target, None));
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn BindTexture(&self, target: u32, texture: Option<&WebGLTexture>) {
let mut bound_textures = self.bound_textures.borrow_mut();
let binding = bound_textures.entry(self.bound_texture_unit.get())
.or_insert(TextureUnitBindings::new());
let slot = match target {
constants::TEXTURE_2D => &binding.bound_texture_2d,
constants::TEXTURE_CUBE_MAP => &binding.bound_texture_cube_map,
_ => return self.webgl_error(InvalidEnum),
};
if let Some(texture) = texture {
match texture.bind(target) {
Ok(_) => slot.set(Some(texture)),
Err(err) => return self.webgl_error(err),
}
} else {
slot.set(None);
// Unbind the currently bound texture
self.send_command(WebGLCommand::BindTexture(target, None));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn GenerateMipmap(&self, target: u32) {
let texture = match target {
constants::TEXTURE_2D |
constants::TEXTURE_CUBE_MAP => self.bound_texture(target),
_ => return self.webgl_error(InvalidEnum),
};
match texture {
Some(texture) => handle_potential_webgl_error!(self, texture.generate_mipmap()),
None => self.webgl_error(InvalidOperation)
}
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
unsafe fn BufferData(&self, cx: *mut JSContext, target: u32, data: *mut JSObject, usage: u32) -> Fallible<()> {
if data.is_null() {
return Ok(self.webgl_error(InvalidValue));
}
typedarray!(in(cx) let array_buffer: ArrayBuffer = data);
let data_vec = match array_buffer {
Ok(mut data) => data.as_slice().to_vec(),
Err(_) => fallible_array_buffer_view_to_vec(cx, data)?,
};
let bound_buffer = match target {
constants::ARRAY_BUFFER => self.bound_buffer_array.get(),
constants::ELEMENT_ARRAY_BUFFER => self.bound_buffer_element_array.get(),
_ => return Ok(self.webgl_error(InvalidEnum)),
};
let bound_buffer = match bound_buffer {
Some(bound_buffer) => bound_buffer,
None => return Ok(self.webgl_error(InvalidValue)),
};
match usage {
constants::STREAM_DRAW |
constants::STATIC_DRAW |
constants::DYNAMIC_DRAW => (),
_ => return Ok(self.webgl_error(InvalidEnum)),
}
handle_potential_webgl_error!(self, bound_buffer.buffer_data(target, &data_vec, usage));
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn BufferData_(&self, target: u32, size: i64, usage: u32) -> Fallible<()> {
let bound_buffer = match target {
constants::ARRAY_BUFFER => self.bound_buffer_array.get(),
constants::ELEMENT_ARRAY_BUFFER => self.bound_buffer_element_array.get(),
_ => return Ok(self.webgl_error(InvalidEnum)),
};
let bound_buffer = match bound_buffer {
Some(bound_buffer) => bound_buffer,
None => return Ok(self.webgl_error(InvalidValue)),
};
if size < 0 {
return Ok(self.webgl_error(InvalidValue));
}
match usage {
constants::STREAM_DRAW |
constants::STATIC_DRAW |
constants::DYNAMIC_DRAW => (),
_ => return Ok(self.webgl_error(InvalidEnum)),
}
// FIXME: Allocating a buffer based on user-requested size is
// not great, but we don't have a fallible allocation to try.
let data = vec![0u8; size as usize];
handle_potential_webgl_error!(self, bound_buffer.buffer_data(target, &data, usage));
Ok(())
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
unsafe fn BufferSubData(&self, cx: *mut JSContext, target: u32, offset: i64, data: *mut JSObject) -> Fallible<()> {
if data.is_null() {
return Ok(self.webgl_error(InvalidValue));
}
typedarray!(in(cx) let array_buffer: ArrayBuffer = data);
let data_vec = match array_buffer {
Ok(mut data) => data.as_slice().to_vec(),
Err(_) => fallible_array_buffer_view_to_vec(cx, data)?,
};
let bound_buffer = match target {
constants::ARRAY_BUFFER => self.bound_buffer_array.get(),
constants::ELEMENT_ARRAY_BUFFER => self.bound_buffer_element_array.get(),
_ => return Ok(self.webgl_error(InvalidEnum)),
};
let bound_buffer = match bound_buffer {
Some(bound_buffer) => bound_buffer,
None => return Ok(self.webgl_error(InvalidOperation)),
};
if offset < 0 {
return Ok(self.webgl_error(InvalidValue));
}
if (offset as usize) + data_vec.len() > bound_buffer.capacity() {
return Ok(self.webgl_error(InvalidValue));
}
self.send_command(WebGLCommand::BufferSubData(target, offset as isize, data_vec));
Ok(())
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
unsafe fn CompressedTexImage2D(&self, cx: *mut JSContext, _target: u32, _level: i32, _internal_format: u32,
_width: i32, _height: i32, _border: i32, pixels: *mut JSObject) -> Fallible<()> {
let _data = fallible_array_buffer_view_to_vec(cx, pixels)?;
// FIXME: No compressed texture format is currently supported, so error out as per
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#COMPRESSED_TEXTURE_SUPPORT
self.webgl_error(InvalidEnum);
Ok(())
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
unsafe fn CompressedTexSubImage2D(&self, cx: *mut JSContext, _target: u32, _level: i32,
_xoffset: i32, _yoffset: i32, _width: i32, _height: i32,
_format: u32, pixels: *mut JSObject) -> Fallible<()> {
let _data = fallible_array_buffer_view_to_vec(cx, pixels)?;
// FIXME: No compressed texture format is currently supported, so error out as per
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#COMPRESSED_TEXTURE_SUPPORT
self.webgl_error(InvalidEnum);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn CopyTexImage2D(&self, target: u32, level: i32, internal_format: u32,
x: i32, y: i32, width: i32, height: i32, border: i32) {
if !self.validate_framebuffer_complete() {
return;
}
let validator = CommonTexImage2DValidator::new(self, target, level,
internal_format, width,
height, border);
let CommonTexImage2DValidatorResult {
texture,
target,
level,
internal_format,
width,
height,
border,
} = match validator.validate() {
Ok(result) => result,
Err(_) => return,
};
let image_info = texture.image_info_for_target(&target, level);
// The color buffer components can be dropped during the conversion to
// the internal_format, but new components cannot be added.
//
// Note that this only applies if we're copying to an already
// initialized texture.
//
// GL_INVALID_OPERATION is generated if the color buffer cannot be
// converted to the internal_format.
if let Some(old_internal_format) = image_info.internal_format() {
if old_internal_format.components() > internal_format.components() {
return self.webgl_error(InvalidOperation);
}
}
// NB: TexImage2D depth is always equal to 1
handle_potential_webgl_error!(self, texture.initialize(target,
width as u32,
height as u32, 1,
internal_format,
level as u32,
None));
let msg = WebGLCommand::CopyTexImage2D(target.as_gl_constant(),
level as i32,
internal_format.as_gl_constant(),
x, y,
width as i32, height as i32,
border as i32);
self.send_command(msg);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn CopyTexSubImage2D(&self, target: u32, level: i32, xoffset: i32, yoffset: i32,
x: i32, y: i32, width: i32, height: i32) {
if !self.validate_framebuffer_complete() {
return;
}
// NB: We use a dummy (valid) format and border in order to reuse the
// common validations, but this should have its own validator.
let validator = CommonTexImage2DValidator::new(self, target, level,
TexFormat::RGBA.as_gl_constant(),
width, height, 0);
let CommonTexImage2DValidatorResult {
texture,
target,
level,
width,
height,
..
} = match validator.validate() {
Ok(result) => result,
Err(_) => return,
};
let image_info = texture.image_info_for_target(&target, level);
// GL_INVALID_VALUE is generated if:
// - xoffset or yoffset is less than 0
// - x offset plus the width is greater than the texture width
// - y offset plus the height is greater than the texture height
if xoffset < 0 || (xoffset as u32 + width) > image_info.width() ||
yoffset < 0 || (yoffset as u32 + height) > image_info.height() {
self.webgl_error(InvalidValue);
return;
}
let msg = WebGLCommand::CopyTexSubImage2D(target.as_gl_constant(),
level as i32, xoffset, yoffset,
x, y,
width as i32, height as i32);
self.send_command(msg);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn Clear(&self, mask: u32) {
if !self.validate_framebuffer_complete() {
return;
}
self.send_command(WebGLCommand::Clear(mask));
self.mark_as_dirty();
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ClearColor(&self, red: f32, green: f32, blue: f32, alpha: f32) {
self.current_clear_color.set((red, green, blue, alpha));
self.send_command(WebGLCommand::ClearColor(red, green, blue, alpha));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ClearDepth(&self, depth: f32) {
self.send_command(WebGLCommand::ClearDepth(depth as f64))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ClearStencil(&self, stencil: i32) {
self.send_command(WebGLCommand::ClearStencil(stencil))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ColorMask(&self, r: bool, g: bool, b: bool, a: bool) {
self.send_command(WebGLCommand::ColorMask(r, g, b, a))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn CullFace(&self, mode: u32) {
match mode {
constants::FRONT | constants::BACK | constants::FRONT_AND_BACK =>
self.send_command(WebGLCommand::CullFace(mode)),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn FrontFace(&self, mode: u32) {
match mode {
constants::CW | constants::CCW =>
self.send_command(WebGLCommand::FrontFace(mode)),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn DepthFunc(&self, func: u32) {
match func {
constants::NEVER | constants::LESS |
constants::EQUAL | constants::LEQUAL |
constants::GREATER | constants::NOTEQUAL |
constants::GEQUAL | constants::ALWAYS =>
self.send_command(WebGLCommand::DepthFunc(func)),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn DepthMask(&self, flag: bool) {
self.send_command(WebGLCommand::DepthMask(flag))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn DepthRange(&self, near: f32, far: f32) {
// From the WebGL 1.0 spec, 6.12: Viewport Depth Range:
//
// "A call to depthRange will generate an
// INVALID_OPERATION error if zNear is greater than
// zFar."
if near > far {
return self.webgl_error(InvalidOperation);
}
self.send_command(WebGLCommand::DepthRange(near as f64, far as f64))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn Enable(&self, cap: u32) {
if self.validate_feature_enum(cap) {
self.send_command(WebGLCommand::Enable(cap));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn Disable(&self, cap: u32) {
if self.validate_feature_enum(cap) {
self.send_command(WebGLCommand::Disable(cap));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn CompileShader(&self, shader: Option<&WebGLShader>) {
if let Some(shader) = shader {
shader.compile(self.webgl_version, self.glsl_version, &self.extension_manager)
}
}
// TODO(emilio): Probably in the future we should keep track of the
// generated objects, either here or in the webgl thread
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn CreateBuffer(&self) -> Option<DomRoot<WebGLBuffer>> {
WebGLBuffer::maybe_new(self.global().as_window(), self.webgl_sender.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn CreateFramebuffer(&self) -> Option<DomRoot<WebGLFramebuffer>> {
WebGLFramebuffer::maybe_new(self.global().as_window(), self.webgl_sender.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
fn CreateRenderbuffer(&self) -> Option<DomRoot<WebGLRenderbuffer>> {
WebGLRenderbuffer::maybe_new(self.global().as_window(), self.webgl_sender.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn CreateTexture(&self) -> Option<DomRoot<WebGLTexture>> {
WebGLTexture::maybe_new(self.global().as_window(), self.webgl_sender.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn CreateProgram(&self) -> Option<DomRoot<WebGLProgram>> {
WebGLProgram::maybe_new(self.global().as_window(), self.webgl_sender.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn CreateShader(&self, shader_type: u32) -> Option<DomRoot<WebGLShader>> {
match shader_type {
constants::VERTEX_SHADER | constants::FRAGMENT_SHADER => {},
_ => {
self.webgl_error(InvalidEnum);
return None;
}
}
WebGLShader::maybe_new(self.global().as_window(), self.webgl_sender.clone(), shader_type)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn DeleteBuffer(&self, buffer: Option<&WebGLBuffer>) {
if let Some(buffer) = buffer {
if buffer.is_attached_to_vao() {
// WebGL spec: The buffers attached to VAOs should still not be deleted.
// They are deleted after the VAO is deleted.
buffer.set_pending_delete();
return;
}
// Remove deleted buffer from bound attrib buffers.
let attrib_ids: Vec<_> = self.bound_attrib_buffers.borrow().iter()
.filter(|&(_, v)| v.id() == buffer.id())
.map(|(&k, _)| k)
.collect();
for id in attrib_ids {
self.bound_attrib_buffers.borrow_mut().remove(&id);
}
// Delete buffer.
handle_object_deletion!(self, self.bound_buffer_array, buffer,
Some(WebGLCommand::BindBuffer(constants::ARRAY_BUFFER, None)));
handle_object_deletion!(self, self.bound_buffer_element_array, buffer,
Some(WebGLCommand::BindBuffer(constants::ELEMENT_ARRAY_BUFFER, None)));
buffer.delete()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn DeleteFramebuffer(&self, framebuffer: Option<&WebGLFramebuffer>) {
if let Some(framebuffer) = framebuffer {
handle_object_deletion!(self, self.bound_framebuffer, framebuffer,
Some(WebGLCommand::BindFramebuffer(constants::FRAMEBUFFER,
WebGLFramebufferBindingRequest::Default)));
framebuffer.delete()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
fn DeleteRenderbuffer(&self, renderbuffer: Option<&WebGLRenderbuffer>) {
if let Some(renderbuffer) = renderbuffer {
handle_object_deletion!(self, self.bound_renderbuffer, renderbuffer,
Some(WebGLCommand::BindRenderbuffer(constants::RENDERBUFFER, None)));
// From the GLES 2.0.25 spec, page 113:
//
// "If a renderbuffer object is deleted while its
// image is attached to the currently bound
// framebuffer, then it is as if
// FramebufferRenderbuffer had been called, with a
// renderbuffer of 0, for each attachment point to
// which this image was attached in the currently
// bound framebuffer."
//
if let Some(fb) = self.bound_framebuffer.get() {
fb.detach_renderbuffer(renderbuffer);
}
renderbuffer.delete()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn DeleteTexture(&self, texture: Option<&WebGLTexture>) {
if let Some(texture) = texture {
// From the GLES 2.0.25 spec, page 85:
//
// "If a texture that is currently bound to one of the targets
// TEXTURE_2D, or TEXTURE_CUBE_MAP is deleted, it is as though
// BindTexture had been executed with the same target and texture
// zero."
//
// The same texture may be bound to multiple texture units.
let mut bound_unit = self.bound_texture_unit.get();
for (texture_unit, binding) in self.bound_textures.borrow().iter() {
if let Some(target) = binding.clear_slot(texture) {
if *texture_unit != bound_unit {
self.send_command(WebGLCommand::ActiveTexture(*texture_unit));
bound_unit = *texture_unit;
}
self.send_command(WebGLCommand::BindTexture(target, None));
}
}
// Restore bound texture unit if it has been changed.
if self.bound_texture_unit.get() != bound_unit {
self.send_command(WebGLCommand::ActiveTexture(self.bound_texture_unit.get()));
}
// From the GLES 2.0.25 spec, page 113:
//
// "If a texture object is deleted while its image is
// attached to the currently bound framebuffer, then
// it is as if FramebufferTexture2D had been called,
// with a texture of 0, for each attachment point to
// which this image was attached in the currently
// bound framebuffer."
if let Some(fb) = self.bound_framebuffer.get() {
fb.detach_texture(texture);
}
texture.delete()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn DeleteProgram(&self, program: Option<&WebGLProgram>) {
if let Some(program) = program {
// FIXME: We should call glUseProgram(0), but
// WebGLCommand::UseProgram() doesn't take an Option
// currently. This is also a problem for useProgram(null)
handle_object_deletion!(self, self.current_program, program, None);
program.delete()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn DeleteShader(&self, shader: Option<&WebGLShader>) {
if let Some(shader) = shader {
shader.delete()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn DrawArrays(&self, mode: u32, first: i32, count: i32) {
match mode {
constants::POINTS | constants::LINE_STRIP |
constants::LINE_LOOP | constants::LINES |
constants::TRIANGLE_STRIP | constants::TRIANGLE_FAN |
constants::TRIANGLES => {
if self.current_program.get().is_none() {
return self.webgl_error(InvalidOperation);
}
if first < 0 || count < 0 {
return self.webgl_error(InvalidValue);
}
if !self.validate_framebuffer_complete() {
return;
}
self.send_command(WebGLCommand::DrawArrays(mode, first, count));
self.mark_as_dirty();
},
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn DrawElements(&self, mode: u32, count: i32, type_: u32, offset: i64) {
// From the GLES 2.0.25 spec, page 21:
//
// "type must be one of UNSIGNED_BYTE or UNSIGNED_SHORT"
let type_size = match type_ {
constants::UNSIGNED_BYTE => 1,
constants::UNSIGNED_SHORT => 2,
_ => return self.webgl_error(InvalidEnum),
};
if offset % type_size != 0 {
return self.webgl_error(InvalidOperation);
}
if count < 0 {
return self.webgl_error(InvalidValue);
}
if offset < 0 {
return self.webgl_error(InvalidValue);
}
if self.current_program.get().is_none() {
// From the WebGL spec
//
// If the CURRENT_PROGRAM is null, an INVALID_OPERATION error will be generated.
// WebGL performs additional error checking beyond that specified
// in OpenGL ES 2.0 during calls to drawArrays and drawElements.
//
return self.webgl_error(InvalidOperation);
}
if let Some(array_buffer) = self.bound_buffer_element_array.get() {
// WebGL Spec: check buffer overflows, must be a valid multiple of the size.
let val = offset as u64 + (count as u64 * type_size as u64);
if val > array_buffer.capacity() as u64 {
return self.webgl_error(InvalidOperation);
}
} else {
// From the WebGL spec
//
// a non-null WebGLBuffer must be bound to the ELEMENT_ARRAY_BUFFER binding point
// or an INVALID_OPERATION error will be generated.
//
return self.webgl_error(InvalidOperation);
}
if !self.validate_framebuffer_complete() {
return;
}
match mode {
constants::POINTS | constants::LINE_STRIP |
constants::LINE_LOOP | constants::LINES |
constants::TRIANGLE_STRIP | constants::TRIANGLE_FAN |
constants::TRIANGLES => {
self.send_command(WebGLCommand::DrawElements(mode, count, type_, offset));
self.mark_as_dirty();
},
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn EnableVertexAttribArray(&self, attrib_id: u32) {
if attrib_id > self.limits.max_vertex_attribs {
return self.webgl_error(InvalidValue);
}
self.send_command(WebGLCommand::EnableVertexAttribArray(attrib_id));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn DisableVertexAttribArray(&self, attrib_id: u32) {
if attrib_id > self.limits.max_vertex_attribs {
return self.webgl_error(InvalidValue);
}
self.send_command(WebGLCommand::DisableVertexAttribArray(attrib_id));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn GetActiveUniform(&self, program: Option<&WebGLProgram>, index: u32) -> Option<DomRoot<WebGLActiveInfo>> {
let program = match program {
Some(program) => program,
None => {
// Reasons to generate InvalidValue error
// From the GLES 2.0 spec
//
// "INVALID_VALUE is generated if index is greater than or equal
// to the number of active uniform variables in program"
//
// A null program has no uniforms so any index is always greater than the active uniforms
// WebGl conformance expects error with null programs. Check tests in get-active-test.html
self.webgl_error(InvalidValue);
return None;
}
};
match program.get_active_uniform(index) {
Ok(ret) => Some(ret),
Err(e) => {
self.webgl_error(e);
return None;
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn GetActiveAttrib(&self, program: Option<&WebGLProgram>, index: u32) -> Option<DomRoot<WebGLActiveInfo>> {
let program = match program {
Some(program) => program,
None => {
// Reasons to generate InvalidValue error
// From the GLES 2.0 spec
//
// "INVALID_VALUE is generated if index is greater than or equal
// to the number of active attribute variables in program"
//
// A null program has no attributes so any index is always greater than the active uniforms
// WebGl conformance expects error with null programs. Check tests in get-active-test.html
self.webgl_error(InvalidValue);
return None;
}
};
match program.get_active_attrib(index) {
Ok(ret) => Some(ret),
Err(e) => {
self.webgl_error(e);
return None;
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn GetAttribLocation(&self, program: Option<&WebGLProgram>, name: DOMString) -> i32 {
if let Some(program) = program {
handle_potential_webgl_error!(self, program.get_attrib_location(name), None).unwrap_or(-1)
} else {
-1
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn GetProgramInfoLog(&self, program: Option<&WebGLProgram>) -> Option<DOMString> {
if let Some(program) = program {
match program.get_info_log() {
Ok(value) => Some(DOMString::from(value)),
Err(e) => {
self.webgl_error(e);
None
}
}
} else {
self.webgl_error(WebGLError::InvalidValue);
None
}
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
unsafe fn GetProgramParameter(&self, _: *mut JSContext, program: Option<&WebGLProgram>, param_id: u32) -> JSVal {
if let Some(program) = program {
match handle_potential_webgl_error!(self, program.parameter(param_id), WebGLParameter::Invalid) {
WebGLParameter::Int(val) => Int32Value(val),
WebGLParameter::Bool(val) => BooleanValue(val),
WebGLParameter::String(_) => panic!("Program parameter should not be string"),
WebGLParameter::Float(_) => panic!("Program parameter should not be float"),
WebGLParameter::FloatArray(_) => {
panic!("Program paramenter should not be float array")
}
WebGLParameter::Invalid => NullValue(),
}
} else {
NullValue()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn GetShaderInfoLog(&self, shader: Option<&WebGLShader>) -> Option<DOMString> {
shader.and_then(|s| s.info_log()).map(DOMString::from)
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
unsafe fn GetShaderParameter(&self, _: *mut JSContext, shader: Option<&WebGLShader>, param_id: u32) -> JSVal {
if let Some(shader) = shader {
match handle_potential_webgl_error!(self, shader.parameter(param_id), WebGLParameter::Invalid) {
WebGLParameter::Int(val) => Int32Value(val),
WebGLParameter::Bool(val) => BooleanValue(val),
WebGLParameter::String(_) => panic!("Shader parameter should not be string"),
WebGLParameter::Float(_) => panic!("Shader parameter should not be float"),
WebGLParameter::FloatArray(_) => {
panic!("Shader paramenter should not be float array")
}
WebGLParameter::Invalid => NullValue(),
}
} else {
NullValue()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn GetShaderPrecisionFormat(&self,
shader_type: u32,
precision_type: u32)
-> Option<DomRoot<WebGLShaderPrecisionFormat>> {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetShaderPrecisionFormat(shader_type,
precision_type,
sender));
match receiver.recv().unwrap() {
Ok((range_min, range_max, precision)) => {
Some(WebGLShaderPrecisionFormat::new(self.global().as_window(), range_min, range_max, precision))
},
Err(error) => {
self.webgl_error(error);
None
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn GetUniformLocation(&self,
program: Option<&WebGLProgram>,
name: DOMString) -> Option<DomRoot<WebGLUniformLocation>> {
program.and_then(|p| {
handle_potential_webgl_error!(self, p.get_uniform_location(name), None)
.map(|location| WebGLUniformLocation::new(self.global().as_window(), location, p.id()))
})
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
unsafe fn GetVertexAttrib(&self, cx: *mut JSContext, index: u32, pname: u32) -> JSVal {
if index == 0 && pname == constants::CURRENT_VERTEX_ATTRIB {
rooted!(in(cx) let mut result = UndefinedValue());
let (x, y, z, w) = self.current_vertex_attrib_0.get();
let attrib = vec![x, y, z, w];
attrib.to_jsval(cx, result.handle_mut());
return result.get()
}
if pname == constants::VERTEX_ATTRIB_ARRAY_BUFFER_BINDING {
rooted!(in(cx) let mut jsval = NullValue());
if let Some(buffer) = self.bound_attrib_buffers.borrow().get(&index) {
buffer.to_jsval(cx, jsval.handle_mut());
}
return jsval.get();
}
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetVertexAttrib(index, pname, sender));
match handle_potential_webgl_error!(self, receiver.recv().unwrap(), WebGLParameter::Invalid) {
WebGLParameter::Int(val) => Int32Value(val),
WebGLParameter::Bool(val) => BooleanValue(val),
WebGLParameter::String(_) => panic!("Vertex attrib should not be string"),
WebGLParameter::Float(_) => panic!("Vertex attrib should not be float"),
WebGLParameter::FloatArray(val) => {
rooted!(in(cx) let mut result = UndefinedValue());
val.to_jsval(cx, result.handle_mut());
result.get()
}
WebGLParameter::Invalid => NullValue(),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn GetVertexAttribOffset(&self, index: u32, pname: u32) -> i64 {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::GetVertexAttribOffset(index, pname, sender));
handle_potential_webgl_error!(self, receiver.recv().unwrap(), 0) as i64
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn Hint(&self, target: u32, mode: u32) {
if target != constants::GENERATE_MIPMAP_HINT && !self.extension_manager.is_hint_target_enabled(target) {
return self.webgl_error(InvalidEnum);
}
match mode {
constants::FASTEST |
constants::NICEST |
constants::DONT_CARE => (),
_ => return self.webgl_error(InvalidEnum),
}
self.send_command(WebGLCommand::Hint(target, mode));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn IsBuffer(&self, buffer: Option<&WebGLBuffer>) -> bool {
buffer.map_or(false, |buf| buf.target().is_some() && !buf.is_deleted())
}
// TODO: We could write this without IPC, recording the calls to `enable` and `disable`.
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn IsEnabled(&self, cap: u32) -> bool {
if self.validate_feature_enum(cap) {
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::IsEnabled(cap, sender));
return receiver.recv().unwrap();
}
false
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn IsFramebuffer(&self, frame_buffer: Option<&WebGLFramebuffer>) -> bool {
frame_buffer.map_or(false, |buf| buf.target().is_some() && !buf.is_deleted())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn IsProgram(&self, program: Option<&WebGLProgram>) -> bool {
program.map_or(false, |p| !p.is_deleted())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
fn IsRenderbuffer(&self, render_buffer: Option<&WebGLRenderbuffer>) -> bool {
render_buffer.map_or(false, |buf| buf.ever_bound() && !buf.is_deleted())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn IsShader(&self, shader: Option<&WebGLShader>) -> bool {
shader.map_or(false, |s| !s.is_deleted() || s.is_attached())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn IsTexture(&self, texture: Option<&WebGLTexture>) -> bool {
texture.map_or(false, |tex| tex.target().is_some() && !tex.is_deleted())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn LineWidth(&self, width: f32) {
if width.is_nan() || width <= 0f32 {
return self.webgl_error(InvalidValue);
}
self.send_command(WebGLCommand::LineWidth(width))
}
// NOTE: Usage of this function could affect rendering while we keep using
// readback to render to the page.
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn PixelStorei(&self, param_name: u32, param_value: i32) {
let mut texture_settings = self.texture_unpacking_settings.get();
match param_name {
constants::UNPACK_FLIP_Y_WEBGL => {
if param_value != 0 {
texture_settings.insert(TextureUnpacking::FLIP_Y_AXIS)
} else {
texture_settings.remove(TextureUnpacking::FLIP_Y_AXIS)
}
self.texture_unpacking_settings.set(texture_settings);
return;
},
constants::UNPACK_PREMULTIPLY_ALPHA_WEBGL => {
if param_value != 0 {
texture_settings.insert(TextureUnpacking::PREMULTIPLY_ALPHA)
} else {
texture_settings.remove(TextureUnpacking::PREMULTIPLY_ALPHA)
}
self.texture_unpacking_settings.set(texture_settings);
return;
},
constants::UNPACK_COLORSPACE_CONVERSION_WEBGL => {
match param_value as u32 {
constants::BROWSER_DEFAULT_WEBGL
=> texture_settings.insert(TextureUnpacking::CONVERT_COLORSPACE),
constants::NONE
=> texture_settings.remove(TextureUnpacking::CONVERT_COLORSPACE),
_ => return self.webgl_error(InvalidEnum),
}
self.texture_unpacking_settings.set(texture_settings);
return;
},
constants::UNPACK_ALIGNMENT |
constants::PACK_ALIGNMENT => {
match param_value {
1 | 2 | 4 | 8 => (),
_ => return self.webgl_error(InvalidValue),
}
self.texture_unpacking_alignment.set(param_value as u32);
return;
},
_ => return self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn PolygonOffset(&self, factor: f32, units: f32) {
self.send_command(WebGLCommand::PolygonOffset(factor, units))
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.12
unsafe fn ReadPixels(&self, cx: *mut JSContext, x: i32, y: i32, width: i32, height: i32,
format: u32, pixel_type: u32, pixels: *mut JSObject) -> Fallible<()> {
if pixels.is_null() {
return Ok(self.webgl_error(InvalidValue));
}
typedarray!(in(cx) let mut pixels_data: ArrayBufferView = pixels);
let (array_type, data) = match { pixels_data.as_mut() } {
Ok(data) => (data.get_array_type(), data.as_mut_slice()),
Err(_) => return Err(Error::Type("Not an ArrayBufferView".to_owned())),
};
if !self.validate_framebuffer_complete() {
return Ok(());
}
match array_type {
Type::Uint8 => (),
_ => return Ok(self.webgl_error(InvalidOperation)),
}
// From the WebGL specification, 5.14.12 Reading back pixels
//
// "Only two combinations of format and type are
// accepted. The first is format RGBA and type
// UNSIGNED_BYTE. The second is an implementation-chosen
// format. The values of format and type for this format
// may be determined by calling getParameter with the
// symbolic constants IMPLEMENTATION_COLOR_READ_FORMAT
// and IMPLEMENTATION_COLOR_READ_TYPE, respectively. The
// implementation-chosen format may vary depending on the
// format of the currently bound rendering
// surface. Unsupported combinations of format and type
// will generate an INVALID_OPERATION error."
//
// To avoid having to support general format packing math, we
// always report RGBA/UNSIGNED_BYTE as our only supported
// format.
if format != constants::RGBA || pixel_type != constants::UNSIGNED_BYTE {
return Ok(self.webgl_error(InvalidOperation));
}
let cpp = 4;
// "If pixels is non-null, but is not large enough to
// retrieve all of the pixels in the specified rectangle
// taking into account pixel store modes, an
// INVALID_OPERATION error is generated."
let stride = match width.checked_mul(cpp) {
Some(stride) => stride,
_ => return Ok(self.webgl_error(InvalidOperation)),
};
match height.checked_mul(stride) {
Some(size) if size <= data.len() as i32 => {}
_ => return Ok(self.webgl_error(InvalidOperation)),
}
// "For any pixel lying outside the frame buffer, the
// corresponding destination buffer range remains
// untouched; see Reading Pixels Outside the
// Framebuffer."
let mut x = x;
let mut y = y;
let mut width = width;
let mut height = height;
let mut dst_offset = 0;
if x < 0 {
dst_offset += cpp * -x;
width += x;
x = 0;
}
if y < 0 {
dst_offset += stride * -y;
height += y;
y = 0;
}
if width < 0 || height < 0 {
return Ok(self.webgl_error(InvalidValue));
}
match self.get_current_framebuffer_size() {
Some((fb_width, fb_height)) => {
if x + width > fb_width {
width = fb_width - x;
}
if y + height > fb_height {
height = fb_height - y;
}
}
_ => return Ok(self.webgl_error(InvalidOperation)),
};
let (sender, receiver) = webgl_channel().unwrap();
self.send_command(WebGLCommand::ReadPixels(x, y, width, height, format, pixel_type, sender));
let result = receiver.recv().unwrap();
for i in 0..height {
for j in 0..(width * cpp) {
data[(dst_offset + i * stride + j) as usize] =
result[(i * width * cpp + j) as usize];
}
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn SampleCoverage(&self, value: f32, invert: bool) {
self.send_command(WebGLCommand::SampleCoverage(value, invert));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.4
fn Scissor(&self, x: i32, y: i32, width: i32, height: i32) {
if width < 0 || height < 0 {
return self.webgl_error(InvalidValue)
}
self.current_scissor.set((x, y, width, height));
self.send_command(WebGLCommand::Scissor(x, y, width, height));
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilFunc(&self, func: u32, ref_: i32, mask: u32) {
match func {
constants::NEVER | constants::LESS | constants::EQUAL | constants::LEQUAL |
constants::GREATER | constants::NOTEQUAL | constants::GEQUAL | constants::ALWAYS =>
self.send_command(WebGLCommand::StencilFunc(func, ref_, mask)),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilFuncSeparate(&self, face: u32, func: u32, ref_: i32, mask: u32) {
match face {
constants::FRONT | constants::BACK | constants::FRONT_AND_BACK => (),
_ => return self.webgl_error(InvalidEnum),
}
match func {
constants::NEVER | constants::LESS | constants::EQUAL | constants::LEQUAL |
constants::GREATER | constants::NOTEQUAL | constants::GEQUAL | constants::ALWAYS =>
self.send_command(WebGLCommand::StencilFuncSeparate(face, func, ref_, mask)),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilMask(&self, mask: u32) {
self.send_command(WebGLCommand::StencilMask(mask))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilMaskSeparate(&self, face: u32, mask: u32) {
match face {
constants::FRONT | constants::BACK | constants::FRONT_AND_BACK =>
self.send_command(WebGLCommand::StencilMaskSeparate(face, mask)),
_ => return self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilOp(&self, fail: u32, zfail: u32, zpass: u32) {
if self.validate_stencil_actions(fail) && self.validate_stencil_actions(zfail) &&
self.validate_stencil_actions(zpass) {
self.send_command(WebGLCommand::StencilOp(fail, zfail, zpass));
} else {
self.webgl_error(InvalidEnum)
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilOpSeparate(&self, face: u32, fail: u32, zfail: u32, zpass: u32) {
match face {
constants::FRONT | constants::BACK | constants::FRONT_AND_BACK => (),
_ => return self.webgl_error(InvalidEnum),
}
if self.validate_stencil_actions(fail) && self.validate_stencil_actions(zfail) &&
self.validate_stencil_actions(zpass) {
self.send_command(WebGLCommand::StencilOpSeparate(face, fail, zfail, zpass))
} else {
self.webgl_error(InvalidEnum)
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn LinkProgram(&self, program: Option<&WebGLProgram>) {
if let Some(program) = program {
if let Err(e) = program.link() {
self.webgl_error(e);
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn ShaderSource(&self, shader: Option<&WebGLShader>, source: DOMString) {
if let Some(shader) = shader {
shader.set_source(source)
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn GetShaderSource(&self, shader: Option<&WebGLShader>) -> Option<DOMString> {
shader.and_then(|s| s.source())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform1f(&self,
uniform: Option<&WebGLUniformLocation>,
val: f32) {
if self.validate_uniform_parameters(uniform, UniformSetterType::Float, &[val]) {
self.send_command(WebGLCommand::Uniform1f(uniform.unwrap().id(), val))
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform1i(&self,
uniform: Option<&WebGLUniformLocation>,
val: i32) {
if self.validate_uniform_parameters(uniform, UniformSetterType::Int, &[val]) {
self.send_command(WebGLCommand::Uniform1i(uniform.unwrap().id(), val))
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform1iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Int32>(cx, data, ConversionBehavior::Default)?;
if self.validate_uniform_parameters(uniform, UniformSetterType::Int, &data_vec) {
self.send_command(WebGLCommand::Uniform1iv(uniform.unwrap().id(), data_vec))
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform1fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform, UniformSetterType::Float, &data_vec) {
self.send_command(WebGLCommand::Uniform1fv(uniform.unwrap().id(), data_vec));
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform2f(&self,
uniform: Option<&WebGLUniformLocation>,
x: f32, y: f32) {
if self.validate_uniform_parameters(uniform, UniformSetterType::FloatVec2, &[x, y]) {
self.send_command(WebGLCommand::Uniform2f(uniform.unwrap().id(), x, y));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform2fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec2,
&data_vec) {
self.send_command(WebGLCommand::Uniform2fv(uniform.unwrap().id(), data_vec));
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform2i(&self,
uniform: Option<&WebGLUniformLocation>,
x: i32, y: i32) {
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec2,
&[x, y]) {
self.send_command(WebGLCommand::Uniform2i(uniform.unwrap().id(), x, y));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform2iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Int32>(cx, data, ConversionBehavior::Default)?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec2,
&data_vec) {
self.send_command(WebGLCommand::Uniform2iv(uniform.unwrap().id(), data_vec));
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform3f(&self,
uniform: Option<&WebGLUniformLocation>,
x: f32, y: f32, z: f32) {
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec3,
&[x, y, z]) {
self.send_command(WebGLCommand::Uniform3f(uniform.unwrap().id(), x, y, z));
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform3fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec3,
&data_vec) {
self.send_command(WebGLCommand::Uniform3fv(uniform.unwrap().id(), data_vec))
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform3i(&self,
uniform: Option<&WebGLUniformLocation>,
x: i32, y: i32, z: i32) {
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec3,
&[x, y, z]) {
self.send_command(WebGLCommand::Uniform3i(uniform.unwrap().id(), x, y, z))
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform3iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Int32>(cx, data, ConversionBehavior::Default)?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec3,
&data_vec) {
self.send_command(WebGLCommand::Uniform3iv(uniform.unwrap().id(), data_vec))
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform4i(&self,
uniform: Option<&WebGLUniformLocation>,
x: i32, y: i32, z: i32, w: i32) {
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec4,
&[x, y, z, w]) {
self.send_command(WebGLCommand::Uniform4i(uniform.unwrap().id(), x, y, z, w))
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform4iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Int32>(cx, data, ConversionBehavior::Default)?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec4,
&data_vec) {
self.send_command(WebGLCommand::Uniform4iv(uniform.unwrap().id(), data_vec))
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn Uniform4f(&self,
uniform: Option<&WebGLUniformLocation>,
x: f32, y: f32, z: f32, w: f32) {
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec4,
&[x, y, z, w]) {
self.send_command(WebGLCommand::Uniform4f(uniform.unwrap().id(), x, y, z, w))
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn Uniform4fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec4,
&data_vec) {
self.send_command(WebGLCommand::Uniform4fv(uniform.unwrap().id(), data_vec))
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn UniformMatrix2fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
transpose: bool,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatMat2,
&data_vec) {
self.send_command(WebGLCommand::UniformMatrix2fv(uniform.unwrap().id(), transpose, data_vec));
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn UniformMatrix3fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
transpose: bool,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatMat3,
&data_vec) {
self.send_command(WebGLCommand::UniformMatrix3fv(uniform.unwrap().id(), transpose, data_vec));
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn UniformMatrix4fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
transpose: bool,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatMat4,
&data_vec) {
self.send_command(WebGLCommand::UniformMatrix4fv(uniform.unwrap().id(), transpose, data_vec));
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn UseProgram(&self, program: Option<&WebGLProgram>) {
if let Some(program) = program {
match program.use_program() {
Ok(()) => self.current_program.set(Some(program)),
Err(e) => self.webgl_error(e),
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn ValidateProgram(&self, program: Option<&WebGLProgram>) {
if let Some(program) = program {
if let Err(e) = program.validate() {
self.webgl_error(e);
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib1f(&self, indx: u32, x: f32) {
self.vertex_attrib(indx, x, 0f32, 0f32, 1f32)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn VertexAttrib1fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if data_vec.len() < 1 {
return Ok(self.webgl_error(InvalidOperation));
}
self.vertex_attrib(indx, data_vec[0], 0f32, 0f32, 1f32);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib2f(&self, indx: u32, x: f32, y: f32) {
self.vertex_attrib(indx, x, y, 0f32, 1f32)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn VertexAttrib2fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if data_vec.len() < 2 {
return Ok(self.webgl_error(InvalidOperation));
}
self.vertex_attrib(indx, data_vec[0], data_vec[1], 0f32, 1f32);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib3f(&self, indx: u32, x: f32, y: f32, z: f32) {
self.vertex_attrib(indx, x, y, z, 1f32)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn VertexAttrib3fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if data_vec.len() < 3 {
return Ok(self.webgl_error(InvalidOperation));
}
self.vertex_attrib(indx, data_vec[0], data_vec[1], data_vec[2], 1f32);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib4f(&self, indx: u32, x: f32, y: f32, z: f32, w: f32) {
self.vertex_attrib(indx, x, y, z, w)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
unsafe fn VertexAttrib4fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = typed_array_or_sequence_to_vec::<Float32>(cx, data, ())?;
if data_vec.len() < 4 {
return Ok(self.webgl_error(InvalidOperation));
}
self.vertex_attrib(indx, data_vec[0], data_vec[1], data_vec[2], data_vec[3]);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttribPointer(&self, attrib_id: u32, size: i32, data_type: u32,
normalized: bool, stride: i32, offset: i64) {
if attrib_id > self.limits.max_vertex_attribs {
return self.webgl_error(InvalidValue);
}
// GLES spec: If offset or stride is negative, an INVALID_VALUE error will be generated
// WebGL spec: the maximum supported stride is 255
if stride < 0 || stride > 255 || offset < 0 {
return self.webgl_error(InvalidValue);
}
if size < 1 || size > 4 {
return self.webgl_error(InvalidValue);
}
let buffer_array = match self.bound_buffer_array.get() {
Some(buffer) => buffer,
None => {
return self.webgl_error(InvalidOperation);
}
};
// stride and offset must be multiple of data_type
match data_type {
constants::BYTE | constants::UNSIGNED_BYTE => {},
constants::SHORT | constants::UNSIGNED_SHORT => {
if offset % 2 > 0 || stride % 2 > 0 {
return self.webgl_error(InvalidOperation);
}
},
constants::FLOAT => {
if offset % 4 > 0 || stride % 4 > 0 {
return self.webgl_error(InvalidOperation);
}
},
_ => return self.webgl_error(InvalidEnum),
}
self.bound_attrib_buffers.borrow_mut().insert(attrib_id, Dom::from_ref(&*buffer_array));
let msg = WebGLCommand::VertexAttribPointer(attrib_id, size, data_type, normalized, stride, offset as u32);
self.send_command(msg);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.4
fn Viewport(&self, x: i32, y: i32, width: i32, height: i32) {
if width < 0 || height < 0 {
return self.webgl_error(InvalidValue)
}
self.send_command(WebGLCommand::Viewport(x, y, width, height))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
#[allow(unsafe_code)]
unsafe fn TexImage2D(&self,
cx: *mut JSContext,
target: u32,
level: i32,
internal_format: u32,
width: i32,
height: i32,
border: i32,
format: u32,
data_type: u32,
data_ptr: *mut JSObject) -> Fallible<()> {
if !self.extension_manager.is_tex_type_enabled(data_type) {
return Ok(self.webgl_error(InvalidEnum));
}
let data = if data_ptr.is_null() {
None
} else {
Some(fallible_array_buffer_view_to_vec(cx, data_ptr)?)
};
let validator = TexImage2DValidator::new(self, target, level,
internal_format, width, height,
border, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
border,
format,
data_type,
} = match validator.validate() {
Ok(result) => result,
Err(_) => return Ok(()), // NB: The validator sets the correct error for us.
};
let unpacking_alignment = self.texture_unpacking_alignment.get();
let expected_byte_length =
match { self.validate_tex_image_2d_data(width, height,
format, data_type,
unpacking_alignment, data_ptr, cx) } {
Ok(byte_length) => byte_length,
Err(()) => return Ok(()),
};
// If data is null, a buffer of sufficient size
// initialized to 0 is passed.
let buff = match data {
None => vec![0u8; expected_byte_length as usize],
Some(data) => data,
};
// From the WebGL spec:
//
// "If pixels is non-null but its size is less than what
// is required by the specified width, height, format,
// type, and pixel storage parameters, generates an
// INVALID_OPERATION error."
if buff.len() < expected_byte_length as usize {
return Ok(self.webgl_error(InvalidOperation));
}
if !self.validate_filterable_texture(&texture, target, level, format, width, height, data_type) {
return Ok(()); // The validator sets the correct error for use
}
let pixels = self.prepare_pixels(format, data_type, width, height,
unpacking_alignment, false, false, buff);
self.tex_image_2d(&texture, target, data_type, format,
level, width, height, border, unpacking_alignment, pixels);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn TexImage2D_(&self,
target: u32,
level: i32,
internal_format: u32,
format: u32,
data_type: u32,
source: Option<ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement>) -> Fallible<()> {
if !self.extension_manager.is_tex_type_enabled(data_type) {
return Ok(self.webgl_error(InvalidEnum));
}
// Get pixels from image source
let (pixels, size, premultiplied) = match self.get_image_pixels(source) {
Ok((pixels, size, premultiplied)) => (pixels, size, premultiplied),
Err(_) => return Ok(()),
};
let validator = TexImage2DValidator::new(self,
target, level, internal_format,
size.width, size.height,
0, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
border,
format,
data_type,
} = match validator.validate() {
Ok(result) => result,
Err(_) => return Ok(()), // NB: The validator sets the correct error for us.
};
if !self.validate_filterable_texture(&texture, target, level, format, width, height, data_type) {
return Ok(()); // The validator sets the correct error for use
}
let unpacking_alignment = 1;
let pixels = self.prepare_pixels(format, data_type, width, height,
unpacking_alignment, premultiplied, true, pixels);
self.tex_image_2d(&texture, target, data_type, format,
level, width, height, border, 1, pixels);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn TexImageDOM(&self,
target: u32,
level: i32,
internal_format: u32,
width: i32,
height: i32,
format: u32,
data_type: u32,
source: &HTMLIFrameElement) -> Fallible<()> {
// Currently DOMToTexture only supports TEXTURE_2D, RGBA, UNSIGNED_BYTE and no levels.
if target != constants::TEXTURE_2D || level != 0 || internal_format != constants::RGBA ||
format != constants::RGBA || data_type != constants::UNSIGNED_BYTE {
return Ok(self.webgl_error(InvalidValue));
}
// Get bound texture
let texture = match self.bound_texture(constants::TEXTURE_2D) {
Some(texture) => texture,
None => {
return Ok(self.webgl_error(InvalidOperation));
}
};
let pipeline_id = source.pipeline_id().ok_or(Error::InvalidState)?;
let document_id = self.global().downcast::<Window>().ok_or(Error::InvalidState)?.webrender_document();
texture.set_attached_to_dom();
let command = DOMToTextureCommand::Attach(self.webgl_sender.context_id(),
texture.id(),
document_id,
pipeline_id.to_webrender(),
Size2D::new(width, height));
self.webgl_sender.send_dom_to_texture(command).unwrap();
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
#[allow(unsafe_code)]
unsafe fn TexSubImage2D(&self,
cx: *mut JSContext,
target: u32,
level: i32,
xoffset: i32,
yoffset: i32,
width: i32,
height: i32,
format: u32,
data_type: u32,
data_ptr: *mut JSObject) -> Fallible<()> {
let data = if data_ptr.is_null() {
None
} else {
Some(fallible_array_buffer_view_to_vec(cx, data_ptr)?)
};
let validator = TexImage2DValidator::new(self, target, level,
format, width, height,
0, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
format,
data_type,
..
} = match validator.validate() {
Ok(result) => result,
Err(_) => return Ok(()), // NB: The validator sets the correct error for us.
};
let unpacking_alignment = self.texture_unpacking_alignment.get();
let expected_byte_length =
match { self.validate_tex_image_2d_data(width, height,
format, data_type,
unpacking_alignment, data_ptr, cx) } {
Ok(byte_length) => byte_length,
Err(()) => return Ok(()),
};
// If data is null, a buffer of sufficient size
// initialized to 0 is passed.
let buff = match data {
None => vec![0u8; expected_byte_length as usize],
Some(data) => data,
};
// From the WebGL spec:
//
// "If pixels is non-null but its size is less than what
// is required by the specified width, height, format,
// type, and pixel storage parameters, generates an
// INVALID_OPERATION error."
if buff.len() < expected_byte_length as usize {
return Ok(self.webgl_error(InvalidOperation));
}
let unpacking_alignment = self.texture_unpacking_alignment.get();
let pixels = self.prepare_pixels(format, data_type, width, height,
unpacking_alignment, false, false, buff);
self.tex_sub_image_2d(texture, target, level, xoffset, yoffset,
width, height, format, data_type, unpacking_alignment, pixels);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn TexSubImage2D_(&self,
target: u32,
level: i32,
xoffset: i32,
yoffset: i32,
format: u32,
data_type: u32,
source: Option<ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement>)
-> Fallible<()> {
let (pixels, size, premultiplied) = match self.get_image_pixels(source) {
Ok((pixels, size, premultiplied)) => (pixels, size, premultiplied),
Err(_) => return Ok(()),
};
let validator = TexImage2DValidator::new(self, target, level, format,
size.width, size.height,
0, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
format,
data_type,
..
} = match validator.validate() {
Ok(result) => result,
Err(_) => return Ok(()), // NB: The validator sets the correct error for us.
};
let unpacking_alignment = 1;
let pixels = self.prepare_pixels(format, data_type, width, height,
unpacking_alignment, premultiplied, true, pixels);
self.tex_sub_image_2d(texture, target, level, xoffset, yoffset,
width, height, format, data_type, 1, pixels);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn TexParameterf(&self, target: u32, name: u32, value: f32) {
self.tex_parameter(target, name, TexParameterValue::Float(value))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn TexParameteri(&self, target: u32, name: u32, value: i32) {
self.tex_parameter(target, name, TexParameterValue::Int(value))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn CheckFramebufferStatus(&self, target: u32) -> u32 {
// From the GLES 2.0.25 spec, 4.4 ("Framebuffer Objects"):
//
// "If target is not FRAMEBUFFER, INVALID_ENUM is
// generated. If CheckFramebufferStatus generates an
// error, 0 is returned."
if target != constants::FRAMEBUFFER {
self.webgl_error(InvalidEnum);
return 0;
}
match self.bound_framebuffer.get() {
Some(fb) => return fb.check_status(),
None => return constants::FRAMEBUFFER_COMPLETE,
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
fn RenderbufferStorage(&self, target: u32, internal_format: u32,
width: i32, height: i32) {
// From the GLES 2.0.25 spec:
//
// "target must be RENDERBUFFER."
if target != constants::RENDERBUFFER {
return self.webgl_error(InvalidOperation)
}
// From the GLES 2.0.25 spec:
//
// "If either width or height is greater than the value of
// MAX_RENDERBUFFER_SIZE , the error INVALID_VALUE is
// generated."
//
// and we have to throw out negative-size values as well just
// like for TexImage.
//
// FIXME: Handle max_renderbuffer_size, which doesn't seem to
// be in limits.
if width < 0 || height < 0 {
return self.webgl_error(InvalidValue);
}
match self.bound_renderbuffer.get() {
Some(rb) => {
handle_potential_webgl_error!(self, rb.storage(internal_format, width, height));
if let Some(fb) = self.bound_framebuffer.get() {
fb.invalidate_renderbuffer(&*rb);
}
}
None => self.webgl_error(InvalidOperation),
};
// FIXME: We need to clear the renderbuffer before it can be
// accessed. See https://github.com/servo/servo/issues/13710
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn FramebufferRenderbuffer(&self, target: u32, attachment: u32,
renderbuffertarget: u32,
rb: Option<&WebGLRenderbuffer>) {
if target != constants::FRAMEBUFFER || renderbuffertarget != constants::RENDERBUFFER {
return self.webgl_error(InvalidEnum);
}
match self.bound_framebuffer.get() {
Some(fb) => handle_potential_webgl_error!(self, fb.renderbuffer(attachment, rb)),
None => self.webgl_error(InvalidOperation),
};
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn FramebufferTexture2D(&self, target: u32, attachment: u32,
textarget: u32, texture: Option<&WebGLTexture>,
level: i32) {
if target != constants::FRAMEBUFFER {
return self.webgl_error(InvalidEnum);
}
match self.bound_framebuffer.get() {
Some(fb) => handle_potential_webgl_error!(self, fb.texture2d(attachment, textarget, texture, level)),
None => self.webgl_error(InvalidOperation),
};
}
}
pub trait LayoutCanvasWebGLRenderingContextHelpers {
#[allow(unsafe_code)]
unsafe fn canvas_data_source(&self) -> HTMLCanvasDataSource;
}
impl LayoutCanvasWebGLRenderingContextHelpers for LayoutDom<WebGLRenderingContext> {
#[allow(unsafe_code)]
unsafe fn canvas_data_source(&self) -> HTMLCanvasDataSource {
HTMLCanvasDataSource::WebGL((*self.unsafe_get()).layout_handle())
}
}
#[derive(Debug, PartialEq)]
pub enum UniformSetterType {
Int,
IntVec2,
IntVec3,
IntVec4,
Float,
FloatVec2,
FloatVec3,
FloatVec4,
FloatMat2,
FloatMat3,
FloatMat4,
}
impl UniformSetterType {
pub fn element_count(&self) -> usize {
match *self {
UniformSetterType::Int => 1,
UniformSetterType::IntVec2 => 2,
UniformSetterType::IntVec3 => 3,
UniformSetterType::IntVec4 => 4,
UniformSetterType::Float => 1,
UniformSetterType::FloatVec2 => 2,
UniformSetterType::FloatVec3 => 3,
UniformSetterType::FloatVec4 => 4,
UniformSetterType::FloatMat2 => 4,
UniformSetterType::FloatMat3 => 9,
UniformSetterType::FloatMat4 => 16,
}
}
}
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