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webgl: Lazily clear the canvas right before the first webgl command of the next frame.

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This commit is contained in:
Josh Matthews 2019-10-08 13:19:21 -04:00
parent 4d7110aca5
commit c53680b282
8 changed files with 138 additions and 124 deletions
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12
components/canvas_traits/webgl.rs
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@ -64,10 +64,10 @@ pub enum WebGLMsg {
/// The WR unlocks a context when it finished reading the shared texture contents.
/// Unlock messages are always sent after a Lock message.
Unlock(WebGLContextId),
/// Creates or updates the image keys required for WebRender.
UpdateWebRenderImage(WebGLContextId, WebGLSender<ImageKey>),
/// Commands used for the DOMToTexture feature.
DOMToTextureCommand(DOMToTextureCommand),
/// Performs a buffer swap.
SwapBuffers(Vec<WebGLContextId>, WebGLSender<()>),
/// Frees all resources and closes the thread.
Exit,
}
@ -93,6 +93,8 @@ pub struct WebGLCreateContextResult {
pub api_type: GlType,
/// The format for creating new offscreen framebuffers for this context.
pub framebuffer_format: GLFormats,
/// The WebRender image key.
pub image_key: ImageKey,
}
#[derive(Clone, Copy, Debug, Deserialize, MallocSizeOf, Serialize)]
@ -174,12 +176,6 @@ impl WebGLMsgSender {
self.sender.send(WebGLMsg::RemoveContext(self.ctx_id))
}
#[inline]
pub fn send_update_wr_image(&self, sender: WebGLSender<ImageKey>) -> WebGLSendResult {
self.sender
.send(WebGLMsg::UpdateWebRenderImage(self.ctx_id, sender))
}
pub fn send_dom_to_texture(&self, command: DOMToTextureCommand) -> WebGLSendResult {
self.sender.send(WebGLMsg::DOMToTextureCommand(command))
}