michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #include "gl/GrGLInterface.h"
michael@0: #include "gl/GrGLUtil.h"
michael@0: #define WIN32_LEAN_AND_MEAN
michael@0: #include <windows.h>
michael@0: 
michael@0: /*
michael@0:  * Windows makes the GL funcs all be __stdcall instead of __cdecl :(
michael@0:  * This implementation will only work if GR_GL_FUNCTION_TYPE is __stdcall.
michael@0:  * Otherwise, a springboard would be needed that hides the calling convention.
michael@0:  */
michael@0: 
michael@0: #define SET_PROC(F) interface->fFunctions.f ## F = (GrGL ## F ## Proc) GetProcAddress(alu.get(), "gl" #F);
michael@0: #define WGL_SET_PROC(F) interface->fFunctions.f ## F = (GrGL ## F ## Proc) wglGetProcAddress("gl" #F);
michael@0: #define WGL_SET_PROC_SUFFIX(F, S) interface->fFunctions.f ## F = (GrGL ## F ## Proc) wglGetProcAddress("gl" #F #S);
michael@0: 
michael@0: class AutoLibraryUnload {
michael@0: public:
michael@0:     AutoLibraryUnload(const char* moduleName) {
michael@0:         fModule = LoadLibrary(moduleName);
michael@0:     }
michael@0:     ~AutoLibraryUnload() {
michael@0:         if (NULL != fModule) {
michael@0:             FreeLibrary(fModule);
michael@0:         }
michael@0:     }
michael@0:     HMODULE get() const { return fModule; }
michael@0: 
michael@0: private:
michael@0:     HMODULE fModule;
michael@0: };
michael@0: 
michael@0: const GrGLInterface* GrGLCreateNativeInterface() {
michael@0:     AutoLibraryUnload alu("opengl32.dll");
michael@0:     if (NULL == alu.get()) {
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     if (NULL != wglGetCurrentContext()) {
michael@0: 
michael@0:         // These should always be present and don't require wglGetProcAddress
michael@0:         GrGLGetStringProc glGetString =
michael@0:             (GrGLGetStringProc) GetProcAddress(alu.get(), "glGetString");
michael@0:         GrGLGetIntegervProc glGetIntegerv =
michael@0:             (GrGLGetIntegervProc) GetProcAddress(alu.get(), "glGetIntegerv");
michael@0:         if (NULL == glGetString || NULL == glGetIntegerv) {
michael@0:             return NULL;
michael@0:         }
michael@0: 
michael@0:         // This may or may not succeed depending on the gl version.
michael@0:         GrGLGetStringiProc glGetStringi = (GrGLGetStringiProc)  wglGetProcAddress("glGetStringi");
michael@0: 
michael@0:         GrGLExtensions extensions;
michael@0:         if (!extensions.init(kGL_GrGLStandard, glGetString, glGetStringi, glGetIntegerv)) {
michael@0:             return NULL;
michael@0:         }
michael@0:         const char* versionString = (const char*) glGetString(GR_GL_VERSION);
michael@0:         GrGLVersion glVer = GrGLGetVersionFromString(versionString);
michael@0: 
michael@0:         if (glVer < GR_GL_VER(1,5)) {
michael@0:             // We must have array and element_array buffer objects.
michael@0:             return NULL;
michael@0:         }
michael@0:         GrGLInterface* interface = SkNEW(GrGLInterface);
michael@0: 
michael@0:         // Functions that are part of GL 1.1 will return NULL in
michael@0:         // wglGetProcAddress
michael@0:         SET_PROC(BindTexture)
michael@0:         SET_PROC(BlendFunc)
michael@0: 
michael@0:         if (glVer >= GR_GL_VER(1,4) ||
michael@0:             extensions.has("GL_ARB_imaging") ||
michael@0:             extensions.has("GL_EXT_blend_color")) {
michael@0:             WGL_SET_PROC(BlendColor);
michael@0:         }
michael@0: 
michael@0:         SET_PROC(Clear)
michael@0:         SET_PROC(ClearColor)
michael@0:         SET_PROC(ClearStencil)
michael@0:         SET_PROC(ColorMask)
michael@0:         SET_PROC(CopyTexSubImage2D)
michael@0:         SET_PROC(CullFace)
michael@0:         SET_PROC(DeleteTextures)
michael@0:         SET_PROC(DepthMask)
michael@0:         SET_PROC(Disable)
michael@0:         SET_PROC(DrawArrays)
michael@0:         SET_PROC(DrawElements)
michael@0:         SET_PROC(DrawBuffer)
michael@0:         SET_PROC(Enable)
michael@0:         SET_PROC(FrontFace)
michael@0:         SET_PROC(Finish)
michael@0:         SET_PROC(Flush)
michael@0:         SET_PROC(GenTextures)
michael@0:         SET_PROC(GetError)
michael@0:         SET_PROC(GetIntegerv)
michael@0:         SET_PROC(GetString)
michael@0:         SET_PROC(GetTexLevelParameteriv)
michael@0:         SET_PROC(LineWidth)
michael@0:         SET_PROC(LoadIdentity)
michael@0:         SET_PROC(LoadMatrixf)
michael@0:         SET_PROC(MatrixMode)
michael@0:         SET_PROC(PixelStorei)
michael@0:         SET_PROC(ReadBuffer)
michael@0:         SET_PROC(ReadPixels)
michael@0:         SET_PROC(Scissor)
michael@0:         SET_PROC(StencilFunc)
michael@0:         SET_PROC(StencilMask)
michael@0:         SET_PROC(StencilOp)
michael@0:         SET_PROC(TexGenfv)
michael@0:         SET_PROC(TexGeni)
michael@0:         SET_PROC(TexImage2D)
michael@0:         SET_PROC(TexParameteri)
michael@0:         SET_PROC(TexParameteriv)
michael@0:         if (glVer >= GR_GL_VER(4,2) || extensions.has("GL_ARB_texture_storage")) {
michael@0:             WGL_SET_PROC(TexStorage2D);
michael@0:         } else if (extensions.has("GL_EXT_texture_storage")) {
michael@0:             WGL_SET_PROC_SUFFIX(TexStorage2D, EXT);
michael@0:         }
michael@0:         SET_PROC(TexSubImage2D)
michael@0:         SET_PROC(Viewport)
michael@0: 
michael@0:         WGL_SET_PROC(ActiveTexture);
michael@0:         WGL_SET_PROC(AttachShader);
michael@0:         WGL_SET_PROC(BeginQuery);
michael@0:         WGL_SET_PROC(BindAttribLocation);
michael@0:         WGL_SET_PROC(BindBuffer);
michael@0:         WGL_SET_PROC(BindFragDataLocation);
michael@0:         WGL_SET_PROC(BufferData);
michael@0:         WGL_SET_PROC(BufferSubData);
michael@0:         WGL_SET_PROC(CompileShader);
michael@0:         WGL_SET_PROC(CompressedTexImage2D);
michael@0:         WGL_SET_PROC(CreateProgram);
michael@0:         WGL_SET_PROC(CreateShader);
michael@0:         WGL_SET_PROC(DeleteBuffers);
michael@0:         WGL_SET_PROC(DeleteQueries);
michael@0:         WGL_SET_PROC(DeleteProgram);
michael@0:         WGL_SET_PROC(DeleteShader);
michael@0:         WGL_SET_PROC(DisableVertexAttribArray);
michael@0:         WGL_SET_PROC(DrawBuffers);
michael@0:         WGL_SET_PROC(EnableVertexAttribArray);
michael@0:         WGL_SET_PROC(EndQuery);
michael@0:         WGL_SET_PROC(GenBuffers);
michael@0:         WGL_SET_PROC(GenerateMipmap);
michael@0:         WGL_SET_PROC(GenQueries);
michael@0:         WGL_SET_PROC(GetBufferParameteriv);
michael@0:         WGL_SET_PROC(GetQueryiv);
michael@0:         WGL_SET_PROC(GetQueryObjectiv);
michael@0:         WGL_SET_PROC(GetQueryObjectuiv);
michael@0:         if (glVer > GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) {
michael@0:             WGL_SET_PROC(GetQueryObjecti64v);
michael@0:             WGL_SET_PROC(GetQueryObjectui64v);
michael@0:             WGL_SET_PROC(QueryCounter);
michael@0:         } else if (extensions.has("GL_EXT_timer_query")) {
michael@0:             WGL_SET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
michael@0:         }
michael@0:         WGL_SET_PROC(GetProgramInfoLog);
michael@0:         WGL_SET_PROC(GetProgramiv);
michael@0:         WGL_SET_PROC(GetShaderInfoLog);
michael@0:         WGL_SET_PROC(GetShaderiv);
michael@0:         WGL_SET_PROC(GetStringi)
michael@0:         WGL_SET_PROC(GetUniformLocation);
michael@0:         WGL_SET_PROC(LinkProgram);
michael@0:         WGL_SET_PROC(ShaderSource);
michael@0:         WGL_SET_PROC(StencilFuncSeparate);
michael@0:         WGL_SET_PROC(StencilMaskSeparate);
michael@0:         WGL_SET_PROC(StencilOpSeparate);
michael@0:         WGL_SET_PROC(Uniform1f);
michael@0:         WGL_SET_PROC(Uniform1i);
michael@0:         WGL_SET_PROC(Uniform1fv);
michael@0:         WGL_SET_PROC(Uniform1iv);
michael@0:         WGL_SET_PROC(Uniform2f);
michael@0:         WGL_SET_PROC(Uniform2i);
michael@0:         WGL_SET_PROC(Uniform2fv);
michael@0:         WGL_SET_PROC(Uniform2iv);
michael@0:         WGL_SET_PROC(Uniform3f);
michael@0:         WGL_SET_PROC(Uniform3i);
michael@0:         WGL_SET_PROC(Uniform3fv);
michael@0:         WGL_SET_PROC(Uniform3iv);
michael@0:         WGL_SET_PROC(Uniform4f);
michael@0:         WGL_SET_PROC(Uniform4i);
michael@0:         WGL_SET_PROC(Uniform4fv);
michael@0:         WGL_SET_PROC(Uniform4iv);
michael@0:         WGL_SET_PROC(UniformMatrix2fv);
michael@0:         WGL_SET_PROC(UniformMatrix3fv);
michael@0:         WGL_SET_PROC(UniformMatrix4fv);
michael@0:         WGL_SET_PROC(UseProgram);
michael@0:         WGL_SET_PROC(VertexAttrib4fv);
michael@0:         WGL_SET_PROC(VertexAttribPointer);
michael@0:         WGL_SET_PROC(BindFragDataLocationIndexed);
michael@0: 
michael@0:         if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
michael@0:             // no ARB suffix for GL_ARB_vertex_array_object
michael@0:             WGL_SET_PROC(BindVertexArray);
michael@0:             WGL_SET_PROC(DeleteVertexArrays);
michael@0:             WGL_SET_PROC(GenVertexArrays);
michael@0:         }
michael@0: 
michael@0:         // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since
michael@0:         // GL_ARB_framebuffer_object doesn't use ARB suffix.)
michael@0:         if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) {
michael@0:             WGL_SET_PROC(GenFramebuffers);
michael@0:             WGL_SET_PROC(GetFramebufferAttachmentParameteriv);
michael@0:             WGL_SET_PROC(GetRenderbufferParameteriv);
michael@0:             WGL_SET_PROC(BindFramebuffer);
michael@0:             WGL_SET_PROC(FramebufferTexture2D);
michael@0:             WGL_SET_PROC(CheckFramebufferStatus);
michael@0:             WGL_SET_PROC(DeleteFramebuffers);
michael@0:             WGL_SET_PROC(RenderbufferStorage);
michael@0:             WGL_SET_PROC(GenRenderbuffers);
michael@0:             WGL_SET_PROC(DeleteRenderbuffers);
michael@0:             WGL_SET_PROC(FramebufferRenderbuffer);
michael@0:             WGL_SET_PROC(BindRenderbuffer);
michael@0:             WGL_SET_PROC(RenderbufferStorageMultisample);
michael@0:             WGL_SET_PROC(BlitFramebuffer);
michael@0:         } else if (extensions.has("GL_EXT_framebuffer_object")) {
michael@0:             WGL_SET_PROC_SUFFIX(GenFramebuffers, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(BindFramebuffer, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(FramebufferTexture2D, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(DeleteFramebuffers, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(RenderbufferStorage, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(GenRenderbuffers, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(BindRenderbuffer, EXT);
michael@0:             if (extensions.has("GL_EXT_framebuffer_multisample")) {
michael@0:                 WGL_SET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
michael@0:             }
michael@0:             if (extensions.has("GL_EXT_framebuffer_blit")) {
michael@0:                 WGL_SET_PROC_SUFFIX(BlitFramebuffer, EXT);
michael@0:             }
michael@0:         } else {
michael@0:             // we must have FBOs
michael@0:             delete interface;
michael@0:             return NULL;
michael@0:         }
michael@0:         WGL_SET_PROC(MapBuffer);
michael@0:         WGL_SET_PROC(UnmapBuffer);
michael@0: 
michael@0:         if (extensions.has("GL_NV_path_rendering")) {
michael@0:             WGL_SET_PROC_SUFFIX(PathCommands, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathCoords, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathSubCommands, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathSubCoords, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathString, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathGlyphs, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathGlyphRange, NV);
michael@0:             WGL_SET_PROC_SUFFIX(WeightPaths, NV);
michael@0:             WGL_SET_PROC_SUFFIX(CopyPath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(InterpolatePaths, NV);
michael@0:             WGL_SET_PROC_SUFFIX(TransformPath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathParameteriv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathParameteri, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathParameterfv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathParameterf, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathDashArray, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GenPaths, NV);
michael@0:             WGL_SET_PROC_SUFFIX(DeletePaths, NV);
michael@0:             WGL_SET_PROC_SUFFIX(IsPath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathStencilFunc, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathStencilDepthOffset, NV);
michael@0:             WGL_SET_PROC_SUFFIX(StencilFillPath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(StencilStrokePath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(StencilFillPathInstanced, NV);
michael@0:             WGL_SET_PROC_SUFFIX(StencilStrokePathInstanced, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathCoverDepthFunc, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathColorGen, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathTexGen, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PathFogGen, NV);
michael@0:             WGL_SET_PROC_SUFFIX(CoverFillPath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(CoverStrokePath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(CoverFillPathInstanced, NV);
michael@0:             WGL_SET_PROC_SUFFIX(CoverStrokePathInstanced, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathParameteriv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathParameterfv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathCommands, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathCoords, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathDashArray, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathMetrics, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathMetricRange, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathSpacing, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathColorGeniv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathColorGenfv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathTexGeniv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathTexGenfv, NV);
michael@0:             WGL_SET_PROC_SUFFIX(IsPointInFillPath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(IsPointInStrokePath, NV);
michael@0:             WGL_SET_PROC_SUFFIX(GetPathLength, NV);
michael@0:             WGL_SET_PROC_SUFFIX(PointAlongPath, NV);
michael@0:         }
michael@0: 
michael@0:         if (extensions.has("GL_EXT_debug_marker")) {
michael@0:             WGL_SET_PROC_SUFFIX(InsertEventMarker, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(PushGroupMarker, EXT);
michael@0:             WGL_SET_PROC_SUFFIX(PopGroupMarker, EXT);
michael@0:         }
michael@0: 
michael@0:         interface->fStandard = kGL_GrGLStandard;
michael@0:         interface->fExtensions.swap(&extensions);
michael@0: 
michael@0:         return interface;
michael@0:     } else {
michael@0:         return NULL;
michael@0:     }
michael@0: }