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servo/components/script/dom/webglrenderingcontext.rs
Eric Anholt dba7d5eb51 webgl: Detach RBs and textures from the bound FBO on deletion. 
This is part of general GL behavior: when an object is deleted, look
through the currently bound objects and detach the deleted object from
them.  Detaching an object from an FBO causes it to need to be
re-checked for its status.
2016-10-25 22:19:26 -07:00

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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 canvas_traits::{CanvasCommonMsg, CanvasMsg, byte_swap};
use core::nonzero::NonZero;
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::{ArrayBufferViewContents, ConversionResult, FromJSValConvertible, ToJSValConvertible};
use dom::bindings::conversions::{array_buffer_to_vec, array_buffer_view_data, array_buffer_view_data_checked};
use dom::bindings::conversions::{array_buffer_view_to_vec, array_buffer_view_to_vec_checked};
use dom::bindings::error::{Error, Fallible};
use dom::bindings::inheritance::Castable;
use dom::bindings::js::{JS, LayoutJS, MutNullableHeap, Root};
use dom::bindings::reflector::{Reflectable, Reflector, reflect_dom_object};
use dom::bindings::str::DOMString;
use dom::event::{Event, EventBubbles, EventCancelable};
use dom::globalscope::GlobalScope;
use dom::htmlcanvaselement::HTMLCanvasElement;
use dom::htmlcanvaselement::utils as canvas_utils;
use dom::node::{Node, NodeDamage, window_from_node};
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::webgltexture::{TexParameterValue, WebGLTexture};
use dom::webgluniformlocation::WebGLUniformLocation;
use euclid::size::Size2D;
use ipc_channel::ipc::{self, IpcSender};
use js::conversions::ConversionBehavior;
use js::jsapi::{JSContext, JSObject, JS_GetArrayBufferViewType, Type};
use js::jsval::{BooleanValue, DoubleValue, Int32Value, JSVal, NullValue, UndefinedValue};
use net_traits::image::base::PixelFormat;
use net_traits::image_cache_thread::ImageResponse;
use offscreen_gl_context::{GLContextAttributes, GLLimits};
use script_traits::ScriptMsg as ConstellationMsg;
use std::cell::Cell;
use webrender_traits::{WebGLCommand, WebGLError, WebGLFramebufferBindingRequest, WebGLParameter};
use webrender_traits::WebGLError::*;
type ImagePixelResult = Result<(Vec<u8>, Size2D<i32>), ()>;
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 {
$self_.ipc_renderer
.send(CanvasMsg::WebGL(command))
.unwrap();
}
}
};
}
macro_rules! object_binding_to_js_or_null {
($cx: expr, $binding:expr) => {
{
rooted!(in($cx) let mut rval = NullValue());
if let Some(bound_object) = $binding.get() {
unsafe {
bound_object.to_jsval($cx, rval.handle_mut());
}
}
rval.get()
}
};
}
/// Set of bitflags for texture unpacking (texImage2d, etc...)
bitflags! {
#[derive(HeapSizeOf, JSTraceable)]
flags TextureUnpacking: u8 {
const FLIP_Y_AXIS = 0x01,
const PREMULTIPLY_ALPHA = 0x02,
const CONVERT_COLORSPACE = 0x04,
}
}
#[dom_struct]
pub struct WebGLRenderingContext {
reflector_: Reflector,
#[ignore_heap_size_of = "Defined in ipc-channel"]
ipc_renderer: IpcSender<CanvasMsg>,
#[ignore_heap_size_of = "Defined in offscreen_gl_context"]
limits: GLLimits,
canvas: JS<HTMLCanvasElement>,
#[ignore_heap_size_of = "Defined in webrender_traits"]
last_error: Cell<Option<WebGLError>>,
texture_unpacking_settings: Cell<TextureUnpacking>,
bound_framebuffer: MutNullableHeap<JS<WebGLFramebuffer>>,
bound_renderbuffer: MutNullableHeap<JS<WebGLRenderbuffer>>,
bound_texture_2d: MutNullableHeap<JS<WebGLTexture>>,
bound_texture_cube_map: MutNullableHeap<JS<WebGLTexture>>,
bound_buffer_array: MutNullableHeap<JS<WebGLBuffer>>,
bound_buffer_element_array: MutNullableHeap<JS<WebGLBuffer>>,
current_program: MutNullableHeap<JS<WebGLProgram>>,
#[ignore_heap_size_of = "Because it's small"]
current_vertex_attrib_0: Cell<(f32, f32, f32, f32)>,
}
impl WebGLRenderingContext {
fn new_inherited(global: &GlobalScope,
canvas: &HTMLCanvasElement,
size: Size2D<i32>,
attrs: GLContextAttributes)
-> Result<WebGLRenderingContext, String> {
let (sender, receiver) = ipc::channel().unwrap();
let constellation_chan = global.constellation_chan();
constellation_chan.send(ConstellationMsg::CreateWebGLPaintThread(size, attrs, sender))
.unwrap();
let result = receiver.recv().unwrap();
result.map(|(ipc_renderer, context_limits)| {
WebGLRenderingContext {
reflector_: Reflector::new(),
ipc_renderer: ipc_renderer,
limits: context_limits,
canvas: JS::from_ref(canvas),
last_error: Cell::new(None),
texture_unpacking_settings: Cell::new(CONVERT_COLORSPACE),
bound_framebuffer: MutNullableHeap::new(None),
bound_texture_2d: MutNullableHeap::new(None),
bound_texture_cube_map: MutNullableHeap::new(None),
bound_buffer_array: MutNullableHeap::new(None),
bound_buffer_element_array: MutNullableHeap::new(None),
bound_renderbuffer: MutNullableHeap::new(None),
current_program: MutNullableHeap::new(None),
current_vertex_attrib_0: Cell::new((0f32, 0f32, 0f32, 1f32)),
}
})
}
#[allow(unrooted_must_root)]
pub fn new(global: &GlobalScope, canvas: &HTMLCanvasElement, size: Size2D<i32>, attrs: GLContextAttributes)
-> Option<Root<WebGLRenderingContext>> {
match WebGLRenderingContext::new_inherited(global, canvas, size, attrs) {
Ok(ctx) => Some(reflect_dom_object(box ctx, global, WebGLRenderingContextBinding::Wrap)),
Err(msg) => {
error!("Couldn't create WebGLRenderingContext: {}", msg);
let event = WebGLContextEvent::new(global,
atom!("webglcontextcreationerror"),
EventBubbles::DoesNotBubble,
EventCancelable::Cancelable,
DOMString::from(msg));
event.upcast::<Event>().fire(canvas.upcast());
None
}
}
}
pub fn limits(&self) -> &GLLimits {
&self.limits
}
pub fn bound_texture_for_target(&self, target: &TexImageTarget) -> Option<Root<WebGLTexture>> {
match *target {
TexImageTarget::Texture2D => self.bound_texture_2d.get(),
TexImageTarget::CubeMapPositiveX |
TexImageTarget::CubeMapNegativeX |
TexImageTarget::CubeMapPositiveY |
TexImageTarget::CubeMapNegativeY |
TexImageTarget::CubeMapPositiveZ |
TexImageTarget::CubeMapNegativeZ => self.bound_texture_cube_map.get(),
}
}
pub fn recreate(&self, size: Size2D<i32>) {
self.ipc_renderer.send(CanvasMsg::Common(CanvasCommonMsg::Recreate(size))).unwrap();
}
pub fn ipc_renderer(&self) -> IpcSender<CanvasMsg> {
self.ipc_renderer.clone()
}
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 => self.bound_texture_2d.get(),
constants::TEXTURE_CUBE_MAP => self.bound_texture_cube_map.get(),
_ => return self.webgl_error(InvalidEnum),
};
if let Some(texture) = texture {
handle_potential_webgl_error!(self, texture.tex_parameter(target, name, value));
} 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::VertexAttrib(indx, x, y, z, w)))
.unwrap();
}
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
}
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) = match source {
ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement::ImageData(image_data) => {
(image_data.get_data_array(), image_data.get_size())
},
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);
// TODO(emilio): Validate that the format argument
// is coherent with the image.
//
// RGB8 should be easy to support too
let mut data = match img.format {
PixelFormat::RGBA8 => img.bytes.to_vec(),
_ => unimplemented!(),
};
byte_swap(&mut data);
(data, size)
},
// 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() {
byte_swap(&mut data);
(data, size)
} else {
return Err(());
}
},
ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement::HTMLVideoElement(_rooted_video)
=> unimplemented!(),
};
return Ok((pixels, size));
}
// 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,
data: *mut JSObject)
-> 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.
// If the types do not match, an INVALID_OPERATION error is generated.
let received_size = if data.is_null() {
element_size
} else {
if array_buffer_view_data_checked::<u16>(data).is_some() {
2
} else if array_buffer_view_data_checked::<u8>(data).is_some() {
1
} 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()
let expected_byte_length = width * height * element_size * components / components_per_element;
return Ok(expected_byte_length);
}
fn tex_image_2d(&self,
texture: Root<WebGLTexture>,
target: TexImageTarget,
data_type: TexDataType,
internal_format: TexFormat,
level: u32,
width: u32,
height: u32,
_border: u32,
pixels: Vec<u8>) { // NB: pixels should NOT be premultipied
if internal_format == TexFormat::RGBA &&
data_type == TexDataType::UnsignedByte &&
self.texture_unpacking_settings.get().contains(PREMULTIPLY_ALPHA) {
// TODO(emilio): premultiply here.
}
// TODO(emilio): Flip Y axis if necessary here
// TexImage2D depth is always equal to 1
handle_potential_webgl_error!(self, texture.initialize(target,
width,
height, 1,
internal_format,
level,
Some(data_type)));
// TODO(emilio): Invert axis, convert colorspace, premultiply alpha if requested
let msg = WebGLCommand::TexImage2D(target.as_gl_constant(), level as i32,
internal_format.as_gl_constant() as i32,
width as i32, height as i32,
internal_format.as_gl_constant(),
data_type.as_gl_constant(), pixels);
self.ipc_renderer
.send(CanvasMsg::WebGL(msg))
.unwrap()
}
fn tex_sub_image_2d(&self,
texture: Root<WebGLTexture>,
target: TexImageTarget,
level: u32,
xoffset: i32,
yoffset: i32,
width: u32,
height: u32,
format: TexFormat,
data_type: TexDataType,
pixels: Vec<u8>) { // NB: pixels should NOT be premultipied
// 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);
}
// TODO(emilio): Flip Y axis if necessary here
// TODO(emilio): Invert axis, convert colorspace, premultiply alpha 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.ipc_renderer
.send(CanvasMsg::WebGL(msg))
.unwrap()
}
// 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 => true,
_ => {
self.webgl_error(InvalidEnum);
false
},
}
}
}
impl Drop for WebGLRenderingContext {
fn drop(&mut self) {
self.ipc_renderer.send(CanvasMsg::Common(CanvasCommonMsg::Close)).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 as FromJSValConvertible>::Config) -> Result<Vec<T>, Error>
where T: ArrayBufferViewContents + FromJSValConvertible,
<T as FromJSValConvertible>::Config: Clone,
{
assert!(!sequence_or_abv.is_null());
if let Some(v) = array_buffer_view_to_vec_checked::<T>(sequence_or_abv) {
return Ok(v);
}
rooted!(in(cx) let mut val = UndefinedValue());
sequence_or_abv.to_jsval(cx, val.handle_mut());
match Vec::<T>::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<T>(abv: *mut JSObject) -> Result<Vec<T>, Error>
where T: ArrayBufferViewContents
{
assert!(!abv.is_null());
match array_buffer_view_to_vec::<T>(abv) {
Some(v) => Ok(v),
None => 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) -> Root<HTMLCanvasElement> {
Root::from_ref(&*self.canvas)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn Flush(&self) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Flush))
.unwrap();
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn Finish(&self) {
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Finish(sender)))
.unwrap();
receiver.recv().unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.1
fn DrawingBufferWidth(&self) -> i32 {
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DrawingBufferWidth(sender)))
.unwrap();
receiver.recv().unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.1
fn DrawingBufferHeight(&self) -> i32 {
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DrawingBufferHeight(sender)))
.unwrap();
receiver.recv().unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn GetBufferParameter(&self, _cx: *mut JSContext, target: u32, parameter: u32) -> JSVal {
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::GetBufferParameter(target, parameter, sender)))
.unwrap();
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
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 =>
return object_binding_to_js_or_null!(cx, &self.bound_texture_2d),
constants::TEXTURE_BINDING_CUBE_MAP =>
return object_binding_to_js_or_null!(cx, &self.bound_texture_cube_map),
_ => {}
}
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::GetParameter(parameter, sender)))
.unwrap();
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());
unsafe {
val.to_jsval(cx, rval.handle_mut());
}
rval.get()
}
WebGLParameter::Invalid => 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) = ipc::channel().unwrap();
// If the send does not succeed, assume context lost
if let Err(_) = self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::GetContextAttributes(sender))) {
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>> {
Some(vec![])
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.14
fn GetExtension(&self, _cx: *mut JSContext, _name: DOMString)
-> Option<NonZero<*mut JSObject>> {
None
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ActiveTexture(&self, texture: u32) {
self.ipc_renderer.send(CanvasMsg::WebGL(WebGLCommand::ActiveTexture(texture))).unwrap();
}
// 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.ipc_renderer.send(CanvasMsg::WebGL(WebGLCommand::BlendColor(r, g, b, a))).unwrap();
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendEquation(&self, mode: u32) {
self.ipc_renderer.send(CanvasMsg::WebGL(WebGLCommand::BlendEquation(mode))).unwrap();
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendEquationSeparate(&self, mode_rgb: u32, mode_alpha: u32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BlendEquationSeparate(mode_rgb, mode_alpha)))
.unwrap();
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendFunc(&self, src_factor: u32, dest_factor: u32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BlendFunc(src_factor, dest_factor)))
.unwrap();
}
// 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) {
self.ipc_renderer.send(
CanvasMsg::WebGL(WebGLCommand::BlendFuncSeparate(src_rgb, dest_rgb, src_alpha, dest_alpha))).unwrap();
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BindBuffer(target, None)))
.unwrap()
}
}
// 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.ipc_renderer.send(CanvasMsg::WebGL(cmd)).unwrap();
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BindRenderbuffer(target, None)))
.unwrap()
}
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn BindTexture(&self, target: u32, texture: Option<&WebGLTexture>) {
let slot = match target {
constants::TEXTURE_2D => &self.bound_texture_2d,
constants::TEXTURE_CUBE_MAP => &self.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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BindTexture(target, None)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn GenerateMipmap(&self, target: u32) {
let slot = match target {
constants::TEXTURE_2D => &self.bound_texture_2d,
constants::TEXTURE_CUBE_MAP => &self.bound_texture_cube_map,
_ => return self.webgl_error(InvalidEnum),
};
match slot.get() {
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
fn BufferData(&self, _cx: *mut JSContext, target: u32, data: *mut JSObject, usage: u32) -> Fallible<()> {
if data.is_null() {
return Ok(self.webgl_error(InvalidValue));
}
let data_vec = unsafe {
match array_buffer_to_vec::<u8>(data) {
Some(data) => data,
// Not an ArrayBuffer object, maybe an ArrayBufferView?
None => try!(fallible_array_buffer_view_to_vec::<u8>(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(())
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
fn BufferSubData(&self, _cx: *mut JSContext, target: u32, offset: i64, data: *mut JSObject) -> Fallible<()> {
if data.is_null() {
return Ok(self.webgl_error(InvalidValue));
}
let data_vec = unsafe {
match array_buffer_to_vec::<u8>(data) {
Some(data) => data,
// Not an ArrayBuffer object, maybe an ArrayBufferView?
None => try!(fallible_array_buffer_view_to_vec::<u8>(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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BufferSubData(target, offset as isize, data_vec)))
.unwrap();
Ok(())
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
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 = try!(unsafe { fallible_array_buffer_view_to_vec::<u8>(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
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 = try!(unsafe { fallible_array_buffer_view_to_vec::<u8>(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.ipc_renderer.send(CanvasMsg::WebGL(msg)).unwrap()
}
// 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.ipc_renderer.send(CanvasMsg::WebGL(msg)).unwrap();
}
// 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.ipc_renderer.send(CanvasMsg::WebGL(WebGLCommand::Clear(mask))).unwrap();
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::ClearColor(red, green, blue, alpha)))
.unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ClearDepth(&self, depth: f32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::ClearDepth(depth as f64)))
.unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn ClearStencil(&self, stencil: i32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::ClearStencil(stencil)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::ColorMask(r, g, b, a)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::CullFace(mode)))
.unwrap(),
_ => 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::FrontFace(mode)))
.unwrap(),
_ => 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DepthFunc(func)))
.unwrap(),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn DepthMask(&self, flag: bool) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DepthMask(flag)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DepthRange(near as f64, far as f64)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Enable(cap)))
.unwrap();
}
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Disable(cap)))
.unwrap()
}
}
// 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()
}
}
// 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<Root<WebGLBuffer>> {
WebGLBuffer::maybe_new(&self.global(), self.ipc_renderer.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.6
fn CreateFramebuffer(&self) -> Option<Root<WebGLFramebuffer>> {
WebGLFramebuffer::maybe_new(&self.global(), self.ipc_renderer.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.7
fn CreateRenderbuffer(&self) -> Option<Root<WebGLRenderbuffer>> {
WebGLRenderbuffer::maybe_new(&self.global(), self.ipc_renderer.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn CreateTexture(&self) -> Option<Root<WebGLTexture>> {
WebGLTexture::maybe_new(&self.global(), self.ipc_renderer.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn CreateProgram(&self) -> Option<Root<WebGLProgram>> {
WebGLProgram::maybe_new(&self.global(), self.ipc_renderer.clone())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn CreateShader(&self, shader_type: u32) -> Option<Root<WebGLShader>> {
match shader_type {
constants::VERTEX_SHADER | constants::FRAGMENT_SHADER => {},
_ => {
self.webgl_error(InvalidEnum);
return None;
}
}
WebGLShader::maybe_new(&self.global(), self.ipc_renderer.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 {
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 {
handle_object_deletion!(self, self.bound_texture_2d, texture,
Some(WebGLCommand::BindTexture(constants::TEXTURE_2D, None)));
handle_object_deletion!(self, self.bound_texture_cube_map, texture,
Some(WebGLCommand::BindTexture(constants::TEXTURE_CUBE_MAP, None)));
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DrawArrays(mode, first, count)))
.unwrap();
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DrawElements(mode, count, type_, offset)))
.unwrap();
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::EnableVertexAttribArray(attrib_id)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::DisableVertexAttribArray(attrib_id)))
.unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn GetActiveUniform(&self, program: Option<&WebGLProgram>, index: u32) -> Option<Root<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<Root<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
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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/#5.14.10
fn GetUniformLocation(&self,
program: Option<&WebGLProgram>,
name: DOMString) -> Option<Root<WebGLUniformLocation>> {
program.and_then(|p| {
handle_potential_webgl_error!(self, p.get_uniform_location(name), None)
.map(|location| WebGLUniformLocation::new(&self.global(), location, p.id()))
})
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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];
unsafe {
attrib.to_jsval(cx, result.handle_mut());
}
return result.get()
}
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer.send(CanvasMsg::WebGL(WebGLCommand::GetVertexAttrib(index, pname, sender))).unwrap();
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());
unsafe {
val.to_jsval(cx, result.handle_mut());
}
result.get()
}
WebGLParameter::Invalid => NullValue(),
}
}
// 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 {
return self.webgl_error(InvalidEnum);
}
match mode {
constants::FASTEST |
constants::NICEST |
constants::DONT_CARE => (),
_ => return self.webgl_error(InvalidEnum),
}
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Hint(target, mode)))
.unwrap()
}
// 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) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::IsEnabled(cap, sender)))
.unwrap();
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::LineWidth(width)))
.unwrap()
}
// 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(FLIP_Y_AXIS)
} else {
texture_settings.remove(FLIP_Y_AXIS)
}
self.texture_unpacking_settings.set(texture_settings);
return;
},
constants::UNPACK_PREMULTIPLY_ALPHA_WEBGL => {
if param_value != 0 {
texture_settings.insert(PREMULTIPLY_ALPHA)
} else {
texture_settings.remove(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(CONVERT_COLORSPACE),
constants::NONE
=> texture_settings.remove(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),
}
},
_ => return self.webgl_error(InvalidEnum),
}
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::PixelStorei(param_name, param_value)))
.unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn PolygonOffset(&self, factor: f32, units: f32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::PolygonOffset(factor, units)))
.unwrap()
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.12
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));
}
let mut data = match unsafe { array_buffer_view_data::<u8>(pixels) } {
Some(data) => data,
None => return Err(Error::Type("Not an ArrayBufferView".to_owned())),
};
if !self.validate_framebuffer_complete() {
return Ok(());
}
match unsafe { JS_GetArrayBufferViewType(pixels) } {
Type::Uint8 => (),
_ => return Ok(self.webgl_error(InvalidOperation)),
}
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::ReadPixels(x, y, width, height, format, pixel_type, sender)))
.unwrap();
let result = receiver.recv().unwrap();
if result.len() > data.len() {
return Ok(self.webgl_error(InvalidOperation));
}
for i in 0..result.len() {
data[i] = result[i]
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn SampleCoverage(&self, value: f32, invert: bool) {
self.ipc_renderer.send(CanvasMsg::WebGL(WebGLCommand::SampleCoverage(value, invert))).unwrap();
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Scissor(x, y, width, height)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::StencilFunc(func, ref_, mask)))
.unwrap(),
_ => 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::StencilFuncSeparate(face, func, ref_, mask)))
.unwrap(),
_ => self.webgl_error(InvalidEnum),
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn StencilMask(&self, mask: u32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::StencilMask(mask)))
.unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::StencilMaskSeparate(face, mask)))
.unwrap(),
_ => 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::StencilOp(fail, zfail, zpass)))
.unwrap()
} 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::StencilOpSeparate(face, fail, zfail, zpass)))
.unwrap()
} 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform1f(uniform.unwrap().id(), val)))
.unwrap()
}
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform1i(uniform.unwrap().id(), val)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform1iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<i32>(cx, data, ConversionBehavior::Default) });
if self.validate_uniform_parameters(uniform, UniformSetterType::Int, &data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform1iv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform1fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform, UniformSetterType::Float, &data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform1fv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform2f(uniform.unwrap().id(), x, y)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform2fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec2,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform2fv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform2i(uniform.unwrap().id(), x, y)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform2iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<i32>(cx, data, ConversionBehavior::Default) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec2,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform2iv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform3f(uniform.unwrap().id(), x, y, z)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform3fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec3,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform3fv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform3i(uniform.unwrap().id(), x, y, z)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform3iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<i32>(cx, data, ConversionBehavior::Default) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec3,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform3iv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform4i(uniform.unwrap().id(), x, y, z, w)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform4iv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<i32>(cx, data, ConversionBehavior::Default) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::IntVec4,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform4iv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform4f(uniform.unwrap().id(), x, y, z, w)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn Uniform4fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatVec4,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Uniform4fv(uniform.unwrap().id(), data_vec)))
.unwrap()
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn UniformMatrix2fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
transpose: bool,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatMat2,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::UniformMatrix2fv(uniform.unwrap().id(), transpose, data_vec)))
.unwrap()
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn UniformMatrix3fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
transpose: bool,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatMat3,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::UniformMatrix3fv(uniform.unwrap().id(), transpose, data_vec)))
.unwrap()
}
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
#[allow(unsafe_code)]
fn UniformMatrix4fv(&self,
cx: *mut JSContext,
uniform: Option<&WebGLUniformLocation>,
transpose: bool,
data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(cx, data, ()) });
if self.validate_uniform_parameters(uniform,
UniformSetterType::FloatMat4,
&data_vec) {
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::UniformMatrix4fv(uniform.unwrap().id(), transpose, data_vec)))
.unwrap()
}
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)]
fn VertexAttrib1fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(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)]
fn VertexAttrib2fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(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)]
fn VertexAttrib3fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(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)]
fn VertexAttrib4fv(&self, cx: *mut JSContext, indx: u32, data: *mut JSObject) -> Fallible<()> {
assert!(!data.is_null());
let data_vec = try!(unsafe { typed_array_or_sequence_to_vec::<f32>(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);
}
if self.bound_buffer_array.get().is_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),
}
let msg = CanvasMsg::WebGL(
WebGLCommand::VertexAttribPointer(attrib_id, size, data_type, normalized, stride, offset as u32));
self.ipc_renderer.send(msg).unwrap()
}
// 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.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::Viewport(x, y, width, height)))
.unwrap()
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
#[allow(unsafe_code)]
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<()> {
let data = if data_ptr.is_null() {
None
} else {
Some(try!(unsafe { fallible_array_buffer_view_to_vec::<u8>(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 expected_byte_length =
match unsafe { self.validate_tex_image_2d_data(width, height,
format, data_type,
data_ptr) } {
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));
}
self.tex_image_2d(texture, target, data_type, format,
level, width, height, border, buff);
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<()> {
// Get pixels from image source
let (pixels, size) = match self.get_image_pixels(source) {
Ok((pixels, size)) => (pixels, size),
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.
};
self.tex_image_2d(texture, target, data_type, format,
level, width, height, border, pixels);
Ok(())
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
#[allow(unsafe_code)]
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(try!(unsafe { fallible_array_buffer_view_to_vec::<u8>(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 expected_byte_length =
match unsafe { self.validate_tex_image_2d_data(width, height,
format, data_type,
data_ptr) } {
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));
}
self.tex_sub_image_2d(texture, target, level, xoffset, yoffset,
width, height, format, data_type, buff);
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) = match self.get_image_pixels(source) {
Ok((pixels, size)) => (pixels, size),
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.
};
self.tex_sub_image_2d(texture, target, level, xoffset, yoffset,
width, height, format, data_type, 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))
}
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,
}
}
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)),
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
}
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),
};
}
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 get_ipc_renderer(&self) -> IpcSender<CanvasMsg>;
}
impl LayoutCanvasWebGLRenderingContextHelpers for LayoutJS<WebGLRenderingContext> {
#[allow(unsafe_code)]
unsafe fn get_ipc_renderer(&self) -> IpcSender<CanvasMsg> {
(*self.unsafe_get()).ipc_renderer.clone()
}
}
#[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,
}
}
pub fn is_compatible_with(&self, gl_type: u32) -> bool {
gl_type == self.as_gl_constant() || match *self {
// Sampler uniform variables have an index value (the index of the
// texture), and as such they have to be set as ints
UniformSetterType::Int => gl_type == constants::SAMPLER_2D ||
gl_type == constants::SAMPLER_CUBE,
// Don't ask me why, but it seems we must allow setting bool
// uniforms with uniform1f.
//
// See the WebGL conformance test
// conformance/uniforms/gl-uniform-bool.html
UniformSetterType::Float => gl_type == constants::BOOL,
UniformSetterType::FloatVec2 => gl_type == constants::BOOL_VEC2,
UniformSetterType::FloatVec3 => gl_type == constants::BOOL_VEC3,
UniformSetterType::FloatVec4 => gl_type == constants::BOOL_VEC4,
_ => false,
}
}
fn as_gl_constant(&self) -> u32 {
match *self {
UniformSetterType::Int => constants::INT,
UniformSetterType::IntVec2 => constants::INT_VEC2,
UniformSetterType::IntVec3 => constants::INT_VEC3,
UniformSetterType::IntVec4 => constants::INT_VEC4,
UniformSetterType::Float => constants::FLOAT,
UniformSetterType::FloatVec2 => constants::FLOAT_VEC2,
UniformSetterType::FloatVec3 => constants::FLOAT_VEC3,
UniformSetterType::FloatVec4 => constants::FLOAT_VEC4,
UniformSetterType::FloatMat2 => constants::FLOAT_MAT2,
UniformSetterType::FloatMat3 => constants::FLOAT_MAT3,
UniformSetterType::FloatMat4 => constants::FLOAT_MAT4,
}
}
}
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