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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 {
WebGLExtensionTextureFloat::WebGLExtensionTextureFloat(WebGLContext* webgl)
: WebGLExtensionBase(webgl) {
MOZ_ASSERT(IsSupported(webgl));
auto& fua = webgl->mFormatUsage;
gl::GLContext* gl = webgl->GL();
webgl::PackingInfo pi;
webgl::DriverUnpackInfo dui;
const GLint* swizzle = nullptr;
const auto fnAdd = [&](webgl::EffectiveFormat effFormat) {
MOZ_ASSERT_IF(swizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
auto usage = fua->EditUsage(effFormat);
usage->textureSwizzleRGBA = swizzle;
fua->AddTexUnpack(usage, pi, dui);
fua->AllowUnsizedTexFormat(pi, usage);
};
bool useSizedFormats = true;
const bool hasSizedLegacyFormats = gl->IsCompatibilityProfile();
if (gl->IsGLES() && gl->Version() < 300) {
useSizedFormats = false;
}
////////////////
pi = {LOCAL_GL_RGBA, LOCAL_GL_FLOAT};
dui = {pi.format, pi.format, pi.type};
swizzle = nullptr;
if (useSizedFormats || gl->IsExtensionSupported(
gl::GLContext::CHROMIUM_color_buffer_float_rgba)) {
// ANGLE only exposes renderable RGBA32F via
// CHROMIUM_color_buffer_float_rgba, which uses sized formats.
dui.internalFormat = LOCAL_GL_RGBA32F;
}
fnAdd(webgl::EffectiveFormat::RGBA32F);
//////
pi = {LOCAL_GL_RGB, LOCAL_GL_FLOAT};
dui = {pi.format, pi.format, pi.type};
swizzle = nullptr;
if (useSizedFormats) {
dui.internalFormat = LOCAL_GL_RGB32F;
}
fnAdd(webgl::EffectiveFormat::RGB32F);
//////
pi = {LOCAL_GL_LUMINANCE, LOCAL_GL_FLOAT};
dui = {pi.format, pi.format, pi.type};
swizzle = nullptr;
if (useSizedFormats) {
if (hasSizedLegacyFormats) {
dui.internalFormat = LOCAL_GL_LUMINANCE32F_ARB;
} else {
dui.internalFormat = LOCAL_GL_R32F;
dui.unpackFormat = LOCAL_GL_RED;
swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
}
}
fnAdd(webgl::EffectiveFormat::Luminance32F);
//////
pi = {LOCAL_GL_ALPHA, LOCAL_GL_FLOAT};
dui = {pi.format, pi.format, pi.type};
swizzle = nullptr;
if (useSizedFormats) {
if (hasSizedLegacyFormats) {
dui.internalFormat = LOCAL_GL_ALPHA32F_ARB;
} else {
dui.internalFormat = LOCAL_GL_R32F;
dui.unpackFormat = LOCAL_GL_RED;
swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
}
}
fnAdd(webgl::EffectiveFormat::Alpha32F);
//////
pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_FLOAT};
dui = {pi.format, pi.format, pi.type};
swizzle = nullptr;
if (useSizedFormats) {
if (hasSizedLegacyFormats) {
dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA32F_ARB;
} else {
dui.internalFormat = LOCAL_GL_RG32F;
dui.unpackFormat = LOCAL_GL_RG;
swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
}
}
fnAdd(webgl::EffectiveFormat::Luminance32FAlpha32F);
}
bool WebGLExtensionTextureFloat::IsSupported(const WebGLContext* webgl) {
if (webgl->IsWebGL2()) return false;
gl::GLContext* gl = webgl->GL();
if (!gl->IsSupported(gl::GLFeature::texture_float)) return false;
const bool needsSwizzle = gl->IsCoreProfile();
const bool hasSwizzle = gl->IsSupported(gl::GLFeature::texture_swizzle);
if (needsSwizzle && !hasSwizzle) return false;
return true;
}
} // namespace mozilla
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