mirror of
https://github.com/servo/servo.git
synced 2025-08-03 04:30:10 +01:00
It implements enough WebGL spec to draw a triangle
This commit is contained in:
Diego Marcos
parent
a346f95e68
commit
79b8e7aa34
17 changed files with 741 additions and 70 deletions
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@ -5,13 +5,23 @@
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use canvas::webgl_paint_task::WebGLPaintTask;
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use canvas::canvas_msg::{CanvasMsg, CanvasWebGLMsg, CanvasCommonMsg};
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use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding;
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use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextMethods;
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use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::{ WebGLRenderingContextMethods, WebGLRenderingContextConstants};
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use dom::bindings::global::{GlobalRef, GlobalField};
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use dom::bindings::js::{JS, JSRef, LayoutJS, Temporary};
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use dom::bindings::utils::{Reflector, reflect_dom_object};
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use dom::htmlcanvaselement::{HTMLCanvasElement};
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use dom::webglbuffer::{WebGLBuffer, WebGLBufferHelpers};
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use dom::webglshader::{WebGLShader, WebGLShaderHelpers};
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use dom::webglprogram::{WebGLProgram, WebGLProgramHelpers};
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use dom::webgluniformlocation::{WebGLUniformLocation, WebGLUniformLocationHelpers};
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use geom::size::Size2D;
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use std::sync::mpsc::{Sender};
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use js::jsapi::{JSContext, JSObject};
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use js::jsfriendapi::bindgen::{JS_GetFloat32ArrayData, JS_GetObjectAsArrayBufferView};
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use js::jsval::{JSVal, NullValue, Int32Value};
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use std::mem;
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use std::ptr;
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use std::sync::mpsc::{channel, Sender};
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use util::str::DOMString;
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#[dom_struct]
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pub struct WebGLRenderingContext {
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@ -59,13 +69,212 @@ impl Drop for WebGLRenderingContext {
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}
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impl<'a> WebGLRenderingContextMethods for JSRef<'a, WebGLRenderingContext> {
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fn Clear(self, mask: u32) -> () {
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn AttachShader(self, program: Option<JSRef<WebGLProgram>>, shader: Option<JSRef<WebGLShader>>) {
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let program_id = match program {
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Some(program) => program.get_id(),
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None => return,
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};
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let shader_id = match shader {
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Some(shader) => shader.get_id(),
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None => return,
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};
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::AttachShader(program_id, shader_id))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
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fn BindBuffer(self, buffer_type: u32, buffer: Option<JSRef<WebGLBuffer>>) {
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let buffer_id = match buffer {
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Some(buffer) => buffer.get_id(),
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None => return,
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};
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::BindBuffer(buffer_type, buffer_id))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
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#[allow(unsafe_code)]
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fn BufferData(self, cx: *mut JSContext, target: u32, data: Option<*mut JSObject>, usage: u32) {
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let data = match data {
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Some(data) => data,
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None => return,
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};
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let data_vec;
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unsafe {
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let mut length = 0;
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let mut ptr = ptr::null_mut();
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let buffer_data = JS_GetObjectAsArrayBufferView(cx, data, &mut length, &mut ptr);
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if buffer_data.is_null() {
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panic!("Argument data to WebGLRenderingContext.bufferdata is not a Float32Array")
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}
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let data_f32 = JS_GetFloat32ArrayData(buffer_data, cx);
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let data_vec_length = length / mem::size_of::<f32>() as u32;
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data_vec = Vec::from_raw_buf(data_f32, data_vec_length as usize);
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}
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::BufferData(target, data_vec, usage))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
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fn Clear(self, mask: u32) {
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::Clear(mask))).unwrap()
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}
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fn ClearColor(self, red: f32, green: f32, blue: f32, alpha: f32) -> (){
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
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fn ClearColor(self, red: f32, green: f32, blue: f32, alpha: f32) {
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::ClearColor(red, green, blue, alpha))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn CompileShader(self, shader: Option<JSRef<WebGLShader>>) {
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let shader_id = match shader {
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Some(shader) => shader.get_id(),
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None => return,
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};
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CompileShader(shader_id))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.5
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fn CreateBuffer(self) -> Option<Temporary<WebGLBuffer>> {
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let (sender, receiver) = channel::<u32>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CreateBuffer(sender))).unwrap();
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Some(WebGLBuffer::new(self.global.root().r(), receiver.recv().unwrap()))
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn CreateProgram(self) -> Option<Temporary<WebGLProgram>> {
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let (sender, receiver) = channel::<u32>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CreateProgram(sender))).unwrap();
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Some(WebGLProgram::new(self.global.root().r(), receiver.recv().unwrap()))
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn CreateShader(self, shader_type: u32) -> Option<Temporary<WebGLShader>> {
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let (sender, receiver) = channel::<u32>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CreateShader(shader_type, sender))).unwrap();
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Some(WebGLShader::new(self.global.root().r(), receiver.recv().unwrap()))
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
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fn DrawArrays(self, mode: u32, first: i32, count: i32) {
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::DrawArrays(mode, first, count))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
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fn EnableVertexAttribArray(self, attrib_id: u32) {
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::EnableVertexAttribArray(attrib_id))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
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fn GetAttribLocation(self, program: Option<JSRef<WebGLProgram>>, name: DOMString) -> i32 {
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let program_id = match program {
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Some(program) => program.get_id(),
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None => return -1,
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};
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let (sender, receiver) = channel::<i32>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetAttribLocation(program_id, name, sender))).unwrap();
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receiver.recv().unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn GetShaderInfoLog(self, shader: Option<JSRef<WebGLShader>>) -> Option<DOMString> {
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let shader_id = match shader {
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Some(shader) => shader.get_id(),
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None => return None,
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};
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let (sender, receiver) = channel::<String>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetShaderInfoLog(shader_id, sender))).unwrap();
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let info = receiver.recv().unwrap();
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Some(info)
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn GetShaderParameter(self, _: *mut JSContext, shader: Option<JSRef<WebGLShader>>, param_id: u32) -> JSVal {
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let shader_id = match shader {
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Some(shader) => shader.get_id(),
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None => return NullValue(),
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};
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let (sender, receiver) = channel::<i32>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetShaderParameter(shader_id, param_id, sender))).unwrap();
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Int32Value(receiver.recv().unwrap())
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
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fn GetUniformLocation(self, program: Option<JSRef<WebGLProgram>>, name: DOMString) -> Option<Temporary<WebGLUniformLocation>> {
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let program_id = match program {
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Some(program) => program.get_id(),
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None => return None,
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};
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let (sender, receiver) = channel::<u32>();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetUniformLocation(program_id, name, sender))).unwrap();
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Some(WebGLUniformLocation::new(self.global.root().r(), receiver.recv().unwrap()))
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn LinkProgram(self, program: Option<JSRef<WebGLProgram>>) {
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let program_id = match program {
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Some(program) => program.get_id(),
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None => return,
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};
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::LinkProgram(program_id))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn ShaderSource(self, shader: Option<JSRef<WebGLShader>>, source: DOMString) {
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let shader_id = match shader {
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Some(shader) => shader.get_id(),
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None => return,
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};
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let source_lines: Vec<String> = source.trim()
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.split(|c: char| c == '\n')
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.map(|line: &str| String::from_str(line) + "\n")
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.collect();
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::ShaderSource(shader_id, source_lines))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
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#[allow(unsafe_code)]
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fn Uniform4fv(self, cx: *mut JSContext, uniform: Option<JSRef<WebGLUniformLocation>>, data: Option<*mut JSObject>) {
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let uniform_id = match uniform {
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Some(uniform) => uniform.get_id(),
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None => return,
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};
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let data = match data {
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Some(data) => data,
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None => return,
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};
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let data_vec: Vec<f32>;
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unsafe {
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let data_f32 = JS_GetFloat32ArrayData(data, cx);
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data_vec = Vec::from_raw_buf(data_f32, 4);
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}
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::Uniform4fv(uniform_id, data_vec))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.9
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fn UseProgram(self, program: Option<JSRef<WebGLProgram>>) {
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let program_id = match program {
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Some(program) => program.get_id(),
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None => return,
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};
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::UseProgram(program_id as u32))).unwrap()
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10
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fn VertexAttribPointer(self, attrib_id: u32, size: i32, data_type: u32,
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normalized: bool, stride: i32, offset: i64) {
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match data_type {
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WebGLRenderingContextConstants::FLOAT => {
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self.renderer.send(
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CanvasMsg::WebGL(CanvasWebGLMsg::VertexAttribPointer2f(attrib_id, size, normalized, stride, offset))).unwrap()
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}
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_ => panic!("VertexAttribPointer: Data Type not supported")
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}
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}
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// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.4
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fn Viewport(self, x: i32, y: i32, width: i32, height: i32) {
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::Viewport(x, y, width, height))).unwrap()
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}
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}
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pub trait LayoutCanvasWebGLRenderingContextHelpers {
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