зеркало из https://github.com/mozilla/gecko-dev.git
119 строки
3.4 KiB
C++
119 строки
3.4 KiB
C++
/* 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebGLExtensions.h"
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#include "GLContext.h"
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#include "mozilla/dom/WebGLRenderingContextBinding.h"
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#include "WebGLContext.h"
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#include "WebGLFormats.h"
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namespace mozilla {
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WebGLExtensionTextureFloat::WebGLExtensionTextureFloat(WebGLContext* webgl)
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: WebGLExtensionBase(webgl) {
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MOZ_ASSERT(IsSupported(webgl));
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auto& fua = webgl->mFormatUsage;
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gl::GLContext* gl = webgl->GL();
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webgl::PackingInfo pi;
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webgl::DriverUnpackInfo dui;
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const GLint* swizzle = nullptr;
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const auto fnAdd = [&fua, &pi, &dui,
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&swizzle](webgl::EffectiveFormat effFormat) {
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auto usage = fua->EditUsage(effFormat);
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usage->textureSwizzleRGBA = swizzle;
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fua->AddTexUnpack(usage, pi, dui);
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fua->AllowUnsizedTexFormat(pi, usage);
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};
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const bool needsSwizzle = gl->IsCoreProfile();
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MOZ_ASSERT_IF(needsSwizzle, gl->IsSupported(gl::GLFeature::texture_swizzle));
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const bool needsSizedFormat = !gl->IsGLES();
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////////////////
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pi = {LOCAL_GL_RGBA, LOCAL_GL_FLOAT};
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dui = {pi.format, pi.format, pi.type};
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swizzle = nullptr;
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if (needsSizedFormat ||
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gl->IsExtensionSupported(
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gl::GLContext::CHROMIUM_color_buffer_float_rgba)) {
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dui.internalFormat = LOCAL_GL_RGBA32F;
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}
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fnAdd(webgl::EffectiveFormat::RGBA32F);
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//////
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pi = {LOCAL_GL_RGB, LOCAL_GL_FLOAT};
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dui = {pi.format, pi.format, pi.type};
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swizzle = nullptr;
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if (needsSizedFormat) {
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dui.internalFormat = LOCAL_GL_RGB32F;
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}
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fnAdd(webgl::EffectiveFormat::RGB32F);
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//////
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pi = {LOCAL_GL_LUMINANCE, LOCAL_GL_FLOAT};
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dui = {pi.format, pi.format, pi.type};
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swizzle = nullptr;
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if (needsSwizzle) {
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dui = {LOCAL_GL_R32F, LOCAL_GL_RED, LOCAL_GL_FLOAT};
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swizzle = webgl::FormatUsageInfo::kLuminanceSwizzleRGBA;
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} else if (needsSizedFormat) {
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dui.internalFormat = LOCAL_GL_LUMINANCE32F_ARB;
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}
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fnAdd(webgl::EffectiveFormat::Luminance32F);
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//////
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pi = {LOCAL_GL_ALPHA, LOCAL_GL_FLOAT};
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dui = {pi.format, pi.format, pi.type};
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swizzle = nullptr;
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if (needsSwizzle) {
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dui = {LOCAL_GL_R32F, LOCAL_GL_RED, LOCAL_GL_FLOAT};
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swizzle = webgl::FormatUsageInfo::kAlphaSwizzleRGBA;
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} else if (needsSizedFormat) {
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dui.internalFormat = LOCAL_GL_ALPHA32F_ARB;
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}
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fnAdd(webgl::EffectiveFormat::Alpha32F);
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//////
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pi = {LOCAL_GL_LUMINANCE_ALPHA, LOCAL_GL_FLOAT};
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dui = {pi.format, pi.format, pi.type};
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swizzle = nullptr;
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if (needsSwizzle) {
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dui = {LOCAL_GL_RG32F, LOCAL_GL_RG, LOCAL_GL_FLOAT};
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swizzle = webgl::FormatUsageInfo::kLumAlphaSwizzleRGBA;
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} else if (needsSizedFormat) {
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dui.internalFormat = LOCAL_GL_LUMINANCE_ALPHA32F_ARB;
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}
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fnAdd(webgl::EffectiveFormat::Luminance32FAlpha32F);
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}
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WebGLExtensionTextureFloat::~WebGLExtensionTextureFloat() {}
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bool WebGLExtensionTextureFloat::IsSupported(const WebGLContext* webgl) {
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if (webgl->IsWebGL2()) return false;
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gl::GLContext* gl = webgl->GL();
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if (!gl->IsSupported(gl::GLFeature::texture_float)) return false;
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const bool needsSwizzle = gl->IsCoreProfile();
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const bool hasSwizzle = gl->IsSupported(gl::GLFeature::texture_swizzle);
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if (needsSwizzle && !hasSwizzle) return false;
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return true;
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}
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IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionTextureFloat, OES_texture_float)
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} // namespace mozilla
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