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Implement WebGL extensions.
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40 changed files with 1346 additions and 86 deletions
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::OESTextureHalfFloatBinding::{self, OESTextureHalfFloatConstants};
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use dom::bindings::js::Root;
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use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
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use dom::webglrenderingcontext::WebGLRenderingContext;
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use dom_struct::dom_struct;
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use super::{constants as webgl, ext_constants as gl, WebGLExtension, WebGLExtensions};
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#[dom_struct]
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pub struct OESTextureHalfFloat {
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reflector_: Reflector,
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}
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impl OESTextureHalfFloat {
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fn new_inherited() -> OESTextureHalfFloat {
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Self {
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reflector_: Reflector::new(),
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}
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}
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}
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impl WebGLExtension for OESTextureHalfFloat {
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type Extension = OESTextureHalfFloat;
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fn new(ctx: &WebGLRenderingContext) -> Root<OESTextureHalfFloat> {
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reflect_dom_object(box OESTextureHalfFloat::new_inherited(),
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&*ctx.global(),
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OESTextureHalfFloatBinding::Wrap)
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}
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fn is_supported(ext: &WebGLExtensions) -> bool {
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ext.supports_any_gl_extension(&["GL_OES_texture_half_float",
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"GL_ARB_half_float_pixel",
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"GL_NV_half_float"])
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}
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fn enable(ext: &WebGLExtensions) {
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// Enable FLOAT text data type
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let hf = OESTextureHalfFloatConstants::HALF_FLOAT_OES;
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ext.enable_tex_type(hf);
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let needs_replace = !ext.supports_gl_extension("GL_OES_texture_float");
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if needs_replace {
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// Special internal formats must be used to avoid clamped float values
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ext.add_effective_tex_internal_format(webgl::RGBA, hf, gl::RGBA16F);
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ext.add_effective_tex_internal_format(webgl::RGB, hf, gl::RGB16F);
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ext.add_effective_tex_internal_format(webgl::LUMINANCE, hf, gl::LUMINANCE16F_ARB);
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ext.add_effective_tex_internal_format(webgl::ALPHA, hf, gl::ALPHA16F_ARB);
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ext.add_effective_tex_internal_format(webgl::LUMINANCE_ALPHA, hf, gl::LUMINANCE_ALPHA16F_ARB);
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}
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}
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fn name() -> &'static str {
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"OES_texture_half_float"
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}
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}
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