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/* 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 {
WebGLExtensionTextureHalfFloat::WebGLExtensionTextureHalfFloat(WebGLContext* webgl)
: WebGLExtensionBase(webgl)
{
auto& fua = webgl->mFormatUsage;
gl::GLContext* gl = webgl->GL();
webgl::PackingInfo pi;
webgl::DriverUnpackInfo dui;
const GLint* swizzle = nullptr;
const auto fnAdd = [&fua, &pi, &dui, &swizzle](webgl::EffectiveFormat effFormat)
{
auto usage = fua->EditUsage(effFormat);
usage->textureSwizzleRGBA = swizzle;
fua->AddTexUnpack(usage, pi, dui);
fua->AllowUnsizedTexFormat(pi, usage);
};
const bool needsSwizzle = gl->IsCoreProfile();
MOZ_ASSERT_IF(needsSwizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
const bool needsSizedFormat = !gl->IsGLES();
GLenum driverUnpackType = LOCAL_GL_HALF_FLOAT;
if (!gl->IsSupported(gl::GLFeature::texture_half_float)) {
MOZ_ASSERT(gl->IsExtensionSupported(gl::GLContext::OES_texture_half_float));
driverUnpackType = LOCAL_GL_HALF_FLOAT_OES;
}
////////////////
pi = {LOCAL_GL_RGBA, LOCAL_GL_HALF_FLOAT_OES};
dui = {pi.format, pi.format, driverUnpackType};
swizzle = nullptr;
if (needsSizedFormat) {
dui.internalFormat = LOCAL_GL_RGBA16F;
}
fnAdd(webgl::EffectiveFormat::RGBA16F);
//////
pi = {LOCAL_GL_RGB, LOCAL_GL_HALF_FLOAT_OES};
dui = {pi.format, pi.format, driverUnpackType};
swizzle = nullptr;
if (needsSizedFormat) {
dui.internalFormat = LOCAL_GL_RGB16F;
}
fnAdd(webgl::EffectiveFormat::RGB16F);
//////
pi = {LOCAL_GL_LUMINANCE, LOCAL_GL_HALF_FLOAT_OES};
dui = {pi.format, pi.format, driverUnpackType};
swizzle = nullptr;
if (needsSwizzle) {
dui = {LOCAL_GL_R16F, LOCAL_GL_RED, driverUnpackType};
swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
} else if (needsSizedFormat) {
dui.internalFormat = LOCAL_GL_LUMINANCE16F_ARB;
}
fnAdd(webgl::EffectiveFormat::Luminance16F);
//////
pi = {LOCAL_GL_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
dui = {pi.format, pi.format, driverUnpackType};
swizzle = nullptr;
if (needsSwizzle) {
dui = {LOCAL_GL_R16F, LOCAL_GL_RED, driverUnpackType};
swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
} else if (needsSizedFormat) {
dui.internalFormat = LOCAL_GL_ALPHA16F_ARB;
}
fnAdd(webgl::EffectiveFormat::Alpha16F);
//////
pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_HALF_FLOAT_OES};
dui = {pi.format, pi.format, driverUnpackType};
swizzle = nullptr;
if (needsSwizzle) {
dui = {LOCAL_GL_RG16F, LOCAL_GL_RG, driverUnpackType};
swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
} else if (needsSizedFormat) {
dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA16F_ARB;
}
fnAdd(webgl::EffectiveFormat::Luminance16FAlpha16F);
}
WebGLExtensionTextureHalfFloat::~WebGLExtensionTextureHalfFloat()
{
}
bool
WebGLExtensionTextureHalfFloat::IsSupported(const WebGLContext* webgl)
{
gl::GLContext* gl = webgl->GL();
if (!gl->IsSupported(gl::GLFeature::texture_half_float) &&
!gl->IsExtensionSupported(gl::GLContext::OES_texture_half_float))
{
return false;
}
const bool needsSwizzle = gl->IsCoreProfile();
const bool hasSwizzle = gl->IsSupported(gl::GLFeature::texture_swizzle);
if (needsSwizzle && !hasSwizzle)
return false;
return true;
}
IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionTextureHalfFloat, OES_texture_half_float)
} // namespace mozilla
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