gecko-dev/dom/canvas/WebGLExtensionColorBufferHa...

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C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLExtensions.h"
#include "GLContext.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "WebGLContext.h"
#include "WebGLFormats.h"
namespace mozilla {
using mozilla::webgl::EffectiveFormat;
WebGLExtensionColorBufferHalfFloat::WebGLExtensionColorBufferHalfFloat(WebGLContext* webgl)
: WebGLExtensionBase(webgl)
{
MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
webgl::FormatUsageAuthority* authority = webgl->mFormatUsage.get();
auto updateUsage = [authority](EffectiveFormat effectiveFormat) {
webgl::FormatUsageInfo* usage = authority->GetUsage(effectiveFormat);
MOZ_ASSERT(usage);
usage->asRenderbuffer = usage->isRenderable = true;
};
// Ensure require formats are initialized.
WebGLExtensionTextureHalfFloat::InitWebGLFormats(authority);
// Update usage to allow asRenderbuffer and isRenderable
updateUsage(EffectiveFormat::RGBA16F);
updateUsage(EffectiveFormat::RGB16F);
updateUsage(EffectiveFormat::Luminance16FAlpha16F);
updateUsage(EffectiveFormat::Luminance16F);
updateUsage(EffectiveFormat::Alpha16F);
}
WebGLExtensionColorBufferHalfFloat::~WebGLExtensionColorBufferHalfFloat()
{
}
bool
WebGLExtensionColorBufferHalfFloat::IsSupported(const WebGLContext* webgl)
{
gl::GLContext* gl = webgl->GL();
// ANGLE doesn't support ReadPixels from a RGBA16F with RGBA/FLOAT.
return gl->IsSupported(gl::GLFeature::renderbuffer_color_half_float) ||
gl->IsANGLE();
}
IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionColorBufferHalfFloat, EXT_color_buffer_half_float)
} // namespace mozilla