1 /* 2 * Copyright 2024 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 #include "include/core/SkTypes.h" 8 #include "src/base/SkLeanWindows.h" 9 #include "include/gpu/ganesh/gl/GrGLAssembleInterface.h" 10 #include "include/gpu/ganesh/gl/GrGLInterface.h" 11 #include "src/gpu/ganesh/gl/GrGLUtil.h" 12 13 #include <memory> 14 #include <type_traits> 15 16 namespace GrGLInterfaces { MakeWin()17sk_sp<const GrGLInterface> MakeWin() { 18 if (nullptr == wglGetCurrentContext()) { 19 return nullptr; 20 } 21 22 struct FreeModule { void operator()(HMODULE m) { (void)FreeLibrary(m); } }; 23 std::unique_ptr<typename std::remove_pointer<HMODULE>::type, FreeModule> module( 24 LoadLibraryExA("opengl32.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32)); 25 if (!module) { 26 return nullptr; 27 } 28 const GrGLGetProc win_get_gl_proc = [](void* ctx, const char* name) { 29 SkASSERT(wglGetCurrentContext()); 30 if (GrGLFuncPtr p = (GrGLFuncPtr)GetProcAddress((HMODULE)ctx, name)) { 31 return p; 32 } 33 if (GrGLFuncPtr p = (GrGLFuncPtr)wglGetProcAddress(name)) { 34 return p; 35 } 36 return (GrGLFuncPtr)nullptr; 37 }; 38 39 GrGLGetStringFn* getString = 40 (GrGLGetStringFn*)win_get_gl_proc((void*)module.get(), "glGetString"); 41 if (!getString) { 42 return nullptr; 43 } 44 const char* verStr = reinterpret_cast<const char*>(getString(GR_GL_VERSION)); 45 GrGLStandard standard = GrGLGetStandardInUseFromString(verStr); 46 47 if (GR_IS_GR_GL_ES(standard)) { 48 return GrGLMakeAssembledGLESInterface((void*)module.get(), win_get_gl_proc); 49 } else if (GR_IS_GR_GL(standard)) { 50 return GrGLMakeAssembledGLInterface((void*)module.get(), win_get_gl_proc); 51 } 52 return nullptr; 53 } 54 } // namespace GrGLInterfaces 55