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Implement various WebGL functions

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This commit is contained in:
David Zbarsky 2015-11-28 18:38:14 -08:00
parent a1fb12616a
commit 0f4d6d58aa
15 changed files with 530 additions and 190 deletions
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279
components/script/dom/webglrenderingcontext.rs
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@ -4,7 +4,7 @@
use canvas_traits::WebGLError::*;
use canvas_traits::{CanvasCommonMsg, CanvasMsg, CanvasWebGLMsg, WebGLError};
use canvas_traits::{WebGLFramebufferBindingRequest, WebGLShaderParameter};
use canvas_traits::{WebGLFramebufferBindingRequest, WebGLParameter};
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::{WebGLRenderingContextMethods};
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::{self, WebGLContextAttributes};
@ -30,7 +30,7 @@ use euclid::size::Size2D;
use ipc_channel::ipc::{self, IpcSender};
use js::jsapi::{JSContext, JSObject, RootedValue};
use js::jsapi::{JS_GetFloat32ArrayData, JS_GetObjectAsArrayBufferView};
use js::jsval::{BooleanValue, Int32Value, JSVal, NullValue, UndefinedValue};
use js::jsval::{BooleanValue, DoubleValue, Int32Value, JSVal, NullValue, UndefinedValue};
use net_traits::image::base::PixelFormat;
use net_traits::image_cache_task::ImageResponse;
use offscreen_gl_context::GLContextAttributes;
@ -145,18 +145,43 @@ impl WebGLRenderingContext {
}
}
pub fn bound_texture_for(&self, target: u32) -> Option<Root<WebGLTexture>> {
match target {
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(),
_ => unreachable!(),
_ => return self.webgl_error(InvalidEnum),
};
if let Some(texture) = texture {
handle_potential_webgl_error!(self, texture.tex_parameter(target, name, value));
} else {
return self.webgl_error(InvalidOperation);
}
}
fn mark_as_dirty(&self) {
self.canvas.upcast::<Node>().dirty(NodeDamage::OtherNodeDamage);
}
#[allow(unsafe_code)]
fn float32_array_to_slice(&self, data: *mut JSObject) -> Option<Vec<f32>> {
unsafe {
let mut length = 0;
let mut ptr = ptr::null_mut();
let buffer_data = JS_GetObjectAsArrayBufferView(data, &mut length, &mut ptr);
if buffer_data.is_null() {
self.webgl_error(InvalidValue); // https://github.com/servo/servo/issues/5014
return None;
}
let data_f32 = JS_GetFloat32ArrayData(data, ptr::null());
Some(slice::from_raw_parts(data_f32, length as usize).to_vec())
}
}
fn vertex_attrib(&self, indx: u32, x: f32, y: f32, z: f32, w: f32) {
self.ipc_renderer
.send(CanvasMsg::WebGL(CanvasWebGLMsg::VertexAttrib(indx, x, y, z, w)))
.unwrap();
}
}
impl Drop for WebGLRenderingContext {
@ -189,21 +214,41 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
receiver.recv().unwrap()
}
#[allow(unsafe_code)]
// 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(CanvasWebGLMsg::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::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 {
// TODO(ecoal95): Implement the missing parameters from the spec
unsafe {
let mut rval = RootedValue::new(cx, UndefinedValue());
match parameter {
constants::VERSION =>
"WebGL 1.0".to_jsval(cx, rval.handle_mut()),
constants::RENDERER |
constants::VENDOR =>
"Mozilla/Servo".to_jsval(cx, rval.handle_mut()),
_ => rval.ptr = NullValue(),
let (sender, receiver) = ipc::channel().unwrap();
self.ipc_renderer
.send(CanvasMsg::WebGL(CanvasWebGLMsg::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::String(val) => {
let mut rval = RootedValue::new(cx, UndefinedValue());
unsafe {
val.to_jsval(cx, rval.handle_mut());
}
rval.ptr
}
rval.ptr
WebGLParameter::Invalid => NullValue(),
}
}
@ -303,6 +348,14 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
}
}
// 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>) {
match target {
@ -393,18 +446,11 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
Some(data) => data,
None => return self.webgl_error(InvalidValue),
};
let data_vec = unsafe {
let mut length = 0;
let mut ptr = ptr::null_mut();
let buffer_data = JS_GetObjectAsArrayBufferView(data, &mut length, &mut ptr);
if buffer_data.is_null() {
return self.webgl_error(InvalidValue) // https://github.com/servo/servo/issues/5014
}
slice::from_raw_parts(ptr, length as usize).to_vec()
};
self.ipc_renderer
.send(CanvasMsg::WebGL(CanvasWebGLMsg::BufferData(target, data_vec, usage)))
.unwrap()
if let Some(data_vec) = self.float32_array_to_slice(data) {
self.ipc_renderer
.send(CanvasMsg::WebGL(CanvasWebGLMsg::BufferData(target, data_vec, usage)))
.unwrap()
}
}
#[allow(unsafe_code)]
@ -669,6 +715,44 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn DrawElements(&self, mode: u32, count: i32, type_: u32, offset: i64) {
let type_size = match type_ {
constants::BYTE | constants::UNSIGNED_BYTE => 1,
constants::SHORT | constants::UNSIGNED_SHORT => 2,
constants::INT | constants::UNSIGNED_INT | constants::FLOAT => 4,
_ => return self.webgl_error(InvalidEnum),
};
if offset % type_size != 0 {
return self.webgl_error(InvalidOperation);
}
if count <= 0 {
return self.webgl_error(InvalidOperation);
}
if offset < 0 {
return self.webgl_error(InvalidValue);
}
// TODO ensure a non-null WebGLBuffer must be bound to the ELEMENT_ARRAY_BUFFER
// TODO(ecoal95): Check the CURRENT_PROGRAM when we keep track of it, and if it's
// null generate an InvalidOperation error
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(CanvasWebGLMsg::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) {
self.ipc_renderer
@ -686,21 +770,34 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
fn GetShaderInfoLog(&self, shader: Option<&WebGLShader>) -> Option<DOMString> {
if let Some(shader) = shader {
shader.info_log().map(DOMString::from)
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::Invalid => NullValue(),
}
} else {
None
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), WebGLShaderParameter::Invalid) {
WebGLShaderParameter::Int(val) => Int32Value(val),
WebGLShaderParameter::Bool(val) => BooleanValue(val),
WebGLShaderParameter::Invalid => NullValue(),
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::Invalid => NullValue(),
}
} else {
NullValue()
@ -848,13 +945,15 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
None => return,
};
let data_vec = unsafe {
let data_f32 = JS_GetFloat32ArrayData(data, ptr::null());
slice::from_raw_parts(data_f32, 4).to_vec()
};
self.ipc_renderer
.send(CanvasMsg::WebGL(CanvasWebGLMsg::Uniform4fv(uniform_id, data_vec)))
.unwrap()
if let Some(data_vec) = self.float32_array_to_slice(data) {
if data_vec.len() < 4 {
return self.webgl_error(InvalidOperation);
}
self.ipc_renderer
.send(CanvasMsg::WebGL(CanvasWebGLMsg::Uniform4fv(uniform_id, data_vec)))
.unwrap()
}
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
@ -864,6 +963,70 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
}
}
// 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)
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib1fv(&self, _cx: *mut JSContext, indx: u32, data: *mut JSObject) {
if let Some(data_vec) = self.float32_array_to_slice(data) {
if data_vec.len() < 4 {
return self.webgl_error(InvalidOperation);
}
self.vertex_attrib(indx, data_vec[0], 0f32, 0f32, 1f32)
}
}
// 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)
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib2fv(&self, _cx: *mut JSContext, indx: u32, data: *mut JSObject) {
if let Some(data_vec) = self.float32_array_to_slice(data) {
if data_vec.len() < 2 {
return self.webgl_error(InvalidOperation);
}
self.vertex_attrib(indx, data_vec[0], data_vec[1], 0f32, 1f32)
}
}
// 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)
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib3fv(&self, _cx: *mut JSContext, indx: u32, data: *mut JSObject) {
if let Some(data_vec) = self.float32_array_to_slice(data) {
if data_vec.len() < 3 {
return self.webgl_error(InvalidOperation);
}
self.vertex_attrib(indx, data_vec[0], data_vec[1], data_vec[2], 1f32)
}
}
// 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)
}
#[allow(unsafe_code)]
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
fn VertexAttrib4fv(&self, _cx: *mut JSContext, indx: u32, data: *mut JSObject) {
if let Some(data_vec) = self.float32_array_to_slice(data) {
if data_vec.len() < 4 {
return self.webgl_error(InvalidOperation);
}
self.vertex_attrib(indx, data_vec[0], data_vec[1], data_vec[2], data_vec[3])
}
}
// 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) {
@ -962,36 +1125,12 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn TexParameterf(&self, target: u32, name: u32, value: f32) {
match target {
constants::TEXTURE_2D |
constants::TEXTURE_CUBE_MAP => {
if let Some(texture) = self.bound_texture_for(target) {
let result = texture.tex_parameter(target, name, TexParameterValue::Float(value));
handle_potential_webgl_error!(self, result);
} else {
return self.webgl_error(InvalidOperation);
}
},
_ => self.webgl_error(InvalidEnum),
}
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) {
match target {
constants::TEXTURE_2D |
constants::TEXTURE_CUBE_MAP => {
if let Some(texture) = self.bound_texture_for(target) {
let result = texture.tex_parameter(target, name, TexParameterValue::Int(value));
handle_potential_webgl_error!(self, result);
} else {
return self.webgl_error(InvalidOperation);
}
},
_ => self.webgl_error(InvalidEnum),
}
self.tex_parameter(target, name, TexParameterValue::Int(value))
}
}