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WebGLRenderingContext getters and getParameter

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This implements the `canvas`, `drawingBufferHeight` and
`drawingBufferWidth` getters to `WebGLRenderingContext`, and an initial
version of `getParameter`.
This commit is contained in:
ecoal95 2015-06-01 13:34:28 +02:00
parent 0de09b936e
commit eff2bb4310
6 changed files with 89 additions and 13 deletions
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27
components/canvas/webgl_paint_task.rs
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@ -32,9 +32,15 @@ impl WebGLPaintTask {
let context = try!(
GLContext::create_offscreen_with_color_attachment(
size, attrs, ColorAttachmentType::TextureWithSurface));
// NOTE: As of right now this is always equal to the size parameter,
// but this doesn't have to be true. Firefox after failing with
// the requested size, tries with the nearest powers of two, for example.
let real_size = context.borrow_draw_buffer().unwrap().size();
Ok(WebGLPaintTask {
size: size,
original_context_size: size,
size: real_size,
original_context_size: real_size,
gl_context: context
})
}
@ -64,10 +70,11 @@ impl WebGLPaintTask {
CanvasWebGLMsg::ShaderSource(shader_id, source) => self.shader_source(shader_id, source),
CanvasWebGLMsg::Uniform4fv(uniform_id, data) => self.uniform_4fv(uniform_id, data),
CanvasWebGLMsg::UseProgram(program_id) => self.use_program(program_id),
CanvasWebGLMsg::VertexAttribPointer2f(attrib_id, size, normalized, stride, offset) => {
self.vertex_attrib_pointer_f32(attrib_id, size, normalized, stride, offset);
},
CanvasWebGLMsg::VertexAttribPointer2f(attrib_id, size, normalized, stride, offset) =>
self.vertex_attrib_pointer_f32(attrib_id, size, normalized, stride, offset),
CanvasWebGLMsg::Viewport(x, y, width, height) => self.viewport(x, y, width, height),
CanvasWebGLMsg::DrawingBufferWidth(sender) => self.send_drawing_buffer_width(sender),
CanvasWebGLMsg::DrawingBufferHeight(sender) => self.send_drawing_buffer_height(sender),
}
}
@ -102,6 +109,14 @@ impl WebGLPaintTask {
sender.send(*self.gl_context.borrow_attributes()).unwrap()
}
fn send_drawing_buffer_width(&self, sender: Sender<i32>) {
sender.send(self.size.width).unwrap()
}
fn send_drawing_buffer_height(&self, sender: Sender<i32>) {
sender.send(self.size.height).unwrap()
}
fn attach_shader(&self, program_id: u32, shader_id: u32) {
gl::attach_shader(program_id, shader_id);
}
@ -229,7 +244,7 @@ impl WebGLPaintTask {
if size.width > self.original_context_size.width ||
size.height > self.original_context_size.height {
try!(self.gl_context.resize(size));
self.size = size;
self.size = self.gl_context.borrow_draw_buffer().unwrap().size();
} else {
self.size = size;
unsafe { gl::Scissor(0, 0, size.width, size.height); }