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Add a check to BlendFunc for invalid constant

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This commit is contained in:
ioctaptceb 2017-01-08 13:39:49 +01:00
parent d1bc1a4f1b
commit f3d65505e9
2 changed files with 33 additions and 48 deletions
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33
components/script/dom/webglrenderingcontext.rs
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@ -103,6 +103,15 @@ macro_rules! object_binding_to_js_or_null {
};
}
fn has_invalid_blend_constants(arg1: u32, arg2: u32) -> bool {
match (arg1, arg2) {
(constants::CONSTANT_COLOR, constants::CONSTANT_ALPHA) => true,
(constants::ONE_MINUS_CONSTANT_COLOR, constants::ONE_MINUS_CONSTANT_ALPHA) => true,
(constants::ONE_MINUS_CONSTANT_COLOR, constants::CONSTANT_ALPHA) => true,
(constants::CONSTANT_COLOR, constants::ONE_MINUS_CONSTANT_ALPHA) => true,
(_, _) => false
}
}
/// Set of bitflags for texture unpacking (texImage2d, etc...)
bitflags! {
#[derive(HeapSizeOf, JSTraceable)]
@ -808,6 +817,18 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendFunc(&self, src_factor: u32, dest_factor: u32) {
// From the WebGL 1.0 spec, 6.13: Viewport Depth Range:
//
// A call to blendFunc will generate an INVALID_OPERATION error if one of the two
// factors is set to CONSTANT_COLOR or ONE_MINUS_CONSTANT_COLOR and the other to
// CONSTANT_ALPHA or ONE_MINUS_CONSTANT_ALPHA.
if has_invalid_blend_constants(src_factor, dest_factor) {
return self.webgl_error(InvalidOperation);
}
if has_invalid_blend_constants(dest_factor, src_factor) {
return self.webgl_error(InvalidOperation);
}
self.ipc_renderer
.send(CanvasMsg::WebGL(WebGLCommand::BlendFunc(src_factor, dest_factor)))
.unwrap();
@ -815,6 +836,18 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendFuncSeparate(&self, src_rgb: u32, dest_rgb: u32, src_alpha: u32, dest_alpha: u32) {
// From the WebGL 1.0 spec, 6.13: Viewport Depth Range:
//
// A call to blendFuncSeparate will generate an INVALID_OPERATION error if srcRGB is
// set to CONSTANT_COLOR or ONE_MINUS_CONSTANT_COLOR and dstRGB is set to
// CONSTANT_ALPHA or ONE_MINUS_CONSTANT_ALPHA or vice versa.
if has_invalid_blend_constants(src_rgb, dest_rgb) {
return self.webgl_error(InvalidOperation);
}
if has_invalid_blend_constants(dest_rgb, src_rgb) {
return self.webgl_error(InvalidOperation);
}
self.ipc_renderer.send(
CanvasMsg::WebGL(WebGLCommand::BlendFuncSeparate(src_rgb, dest_rgb, src_alpha, dest_alpha))).unwrap();
}