1 // Copyright 2019 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "dawn_native/opengl/OpenGLFunctions.h" 16 17 #include <cctype> 18 19 namespace dawn_native { namespace opengl { 20 Initialize(GetProcAddress getProc)21 MaybeError OpenGLFunctions::Initialize(GetProcAddress getProc) { 22 DAWN_TRY(mVersion.Initialize(getProc)); 23 if (mVersion.IsES()) { 24 DAWN_TRY(LoadOpenGLESProcs(getProc, mVersion.GetMajor(), mVersion.GetMinor())); 25 } else { 26 DAWN_TRY(LoadDesktopGLProcs(getProc, mVersion.GetMajor(), mVersion.GetMinor())); 27 } 28 29 InitializeSupportedGLExtensions(); 30 31 return {}; 32 } 33 InitializeSupportedGLExtensions()34 void OpenGLFunctions::InitializeSupportedGLExtensions() { 35 int32_t numExtensions; 36 GetIntegerv(GL_NUM_EXTENSIONS, &numExtensions); 37 38 for (int32_t i = 0; i < numExtensions; ++i) { 39 const char* extensionName = reinterpret_cast<const char*>(GetStringi(GL_EXTENSIONS, i)); 40 mSupportedGLExtensionsSet.insert(extensionName); 41 } 42 } 43 IsGLExtensionSupported(const char * extension) const44 bool OpenGLFunctions::IsGLExtensionSupported(const char* extension) const { 45 ASSERT(extension != nullptr); 46 return mSupportedGLExtensionsSet.count(extension) != 0; 47 } 48 GetVersion() const49 const OpenGLVersion& OpenGLFunctions::GetVersion() const { 50 return mVersion; 51 } 52 IsAtLeastGL(uint32_t majorVersion,uint32_t minorVersion) const53 bool OpenGLFunctions::IsAtLeastGL(uint32_t majorVersion, uint32_t minorVersion) const { 54 return mVersion.IsDesktop() && mVersion.IsAtLeast(majorVersion, minorVersion); 55 } 56 IsAtLeastGLES(uint32_t majorVersion,uint32_t minorVersion) const57 bool OpenGLFunctions::IsAtLeastGLES(uint32_t majorVersion, uint32_t minorVersion) const { 58 return mVersion.IsES() && mVersion.IsAtLeast(majorVersion, minorVersion); 59 } 60 61 }} // namespace dawn_native::opengl 62