Implement EXT_blend_minmax

This commit is contained in:
Anthony Ramine 2018-06-22 11:30:10 +02:00
parent 6a4bd8d3fa
commit 02b8766e75
6 changed files with 99 additions and 65 deletions

View file

@ -12,6 +12,7 @@ use canvas_traits::webgl::{WebGLResult, WebGLSLVersion, WebGLVersion};
use canvas_traits::webgl::{WebVRCommand, webgl_channel};
use canvas_traits::webgl::WebGLError::*;
use dom::bindings::cell::DomRefCell;
use dom::bindings::codegen::Bindings::EXTBlendMinmaxBinding::EXTBlendMinmaxConstants;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::{self, WebGLContextAttributes};
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextMethods;
@ -1193,6 +1194,21 @@ impl WebGLRenderingContext {
_ => Err(WebGLError::InvalidEnum),
}
}
fn validate_blend_mode(&self, mode: u32) -> WebGLResult<()> {
match mode {
constants::FUNC_ADD |
constants::FUNC_SUBTRACT |
constants::FUNC_REVERSE_SUBTRACT => {
Ok(())
}
EXTBlendMinmaxConstants::MIN_EXT |
EXTBlendMinmaxConstants::MAX_EXT if self.extension_manager.is_blend_minmax_enabled() => {
Ok(())
}
_ => Err(InvalidEnum),
}
}
}
impl Drop for WebGLRenderingContext {
@ -1547,30 +1563,14 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendEquation(&self, mode: u32) {
match mode {
constants::FUNC_ADD |
constants::FUNC_SUBTRACT |
constants::FUNC_REVERSE_SUBTRACT => {
self.send_command(WebGLCommand::BlendEquation(mode))
}
_ => self.webgl_error(InvalidEnum),
}
handle_potential_webgl_error!(self, self.validate_blend_mode(mode), return);
self.send_command(WebGLCommand::BlendEquation(mode))
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
fn BlendEquationSeparate(&self, mode_rgb: u32, mode_alpha: u32) {
match mode_rgb {
constants::FUNC_ADD |
constants::FUNC_SUBTRACT |
constants::FUNC_REVERSE_SUBTRACT => {},
_ => return self.webgl_error(InvalidEnum),
}
match mode_alpha {
constants::FUNC_ADD |
constants::FUNC_SUBTRACT |
constants::FUNC_REVERSE_SUBTRACT => {},
_ => return self.webgl_error(InvalidEnum),
}
handle_potential_webgl_error!(self, self.validate_blend_mode(mode_rgb), return);
handle_potential_webgl_error!(self, self.validate_blend_mode(mode_alpha), return);
self.send_command(WebGLCommand::BlendEquationSeparate(mode_rgb, mode_alpha));
}