/* 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