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Add support for WebGL2 ReadPixels functions
Adds support for the new ReadPixels functions introduced with WebGL2 and the relevant PixelStorei parameters. Reference: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.10
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9 changed files with 385 additions and 404 deletions
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@ -380,7 +380,7 @@ impl WebGLRenderingContext {
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//
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// The WebGL spec mentions a couple more operations that trigger
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// this: clear() and getParameter(IMPLEMENTATION_COLOR_READ_*).
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fn validate_framebuffer(&self) -> WebGLResult<()> {
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pub fn validate_framebuffer(&self) -> WebGLResult<()> {
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match self.bound_framebuffer.get() {
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Some(fb) => match fb.check_status_for_rendering() {
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CompleteForRendering::Complete => Ok(()),
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@ -481,7 +481,7 @@ impl WebGLRenderingContext {
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self.send_command(WebGLCommand::VertexAttrib(indx, x, y, z, w));
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}
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fn get_current_framebuffer_size(&self) -> Option<(i32, i32)> {
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pub fn get_current_framebuffer_size(&self) -> Option<(i32, i32)> {
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match self.bound_framebuffer.get() {
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Some(fb) => return fb.size(),
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@ -490,6 +490,10 @@ impl WebGLRenderingContext {
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}
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}
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pub fn get_texture_packing_alignment(&self) -> u8 {
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self.texture_packing_alignment.get()
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}
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// LINEAR filtering may be forbidden when using WebGL extensions.
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// https://www.khronos.org/registry/webgl/extensions/OES_texture_float_linear/
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fn validate_filterable_texture(
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