| /* |
| Copyright 2011 Google Inc. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| #include "GrGLInterface.h" |
| |
| #include "GL/osmesa.h" |
| #include <GL/glext.h> |
| #include <GL/glu.h> |
| |
| #define GR_GL_GET_PROC(F) gDefaultInterface.f ## F = (GrGL ## F ## Proc) \ |
| OSMesaGetProcAddress("gl" #F); |
| #define GR_GL_GET_PROC_SUFFIX(F, S) gDefaultInterface.f ## F = (GrGL ## F ## Proc) \ |
| OSMesaGetProcAddress("gl" #F #S); |
| |
| void GrGLSetDefaultGLInterface() { |
| static GrGLInterface gDefaultInterface; |
| static bool gDefaultInterfaceInit; |
| if (!gDefaultInterfaceInit && NULL != OSMesaGetCurrentContext()) { |
| int major, minor; |
| const char* versionString = (const char*) glGetString(GL_VERSION); |
| const char* extString = (const char*) glGetString(GL_EXTENSIONS); |
| gl_version_from_string(&major, &minor, versionString); |
| |
| if (major == 1 && minor < 5) { |
| // We must have array and element_array buffer objects. |
| return; |
| } |
| |
| gDefaultInterface.fActiveTexture = glActiveTexture; |
| GR_GL_GET_PROC(AttachShader); |
| GR_GL_GET_PROC(BindAttribLocation); |
| GR_GL_GET_PROC(BindBuffer); |
| gDefaultInterface.fBindTexture = glBindTexture; |
| gDefaultInterface.fBlendColor = glBlendColor; |
| gDefaultInterface.fBlendFunc = glBlendFunc; |
| GR_GL_GET_PROC(BufferData); |
| GR_GL_GET_PROC(BufferSubData); |
| gDefaultInterface.fClear = glClear; |
| gDefaultInterface.fClearColor = glClearColor; |
| gDefaultInterface.fClearStencil = glClearStencil; |
| gDefaultInterface.fClientActiveTexture = glClientActiveTexture; |
| gDefaultInterface.fColorMask = glColorMask; |
| gDefaultInterface.fColorPointer = glColorPointer; |
| gDefaultInterface.fColor4ub = glColor4ub; |
| GR_GL_GET_PROC(CompileShader); |
| gDefaultInterface.fCompressedTexImage2D = glCompressedTexImage2D; |
| GR_GL_GET_PROC(CreateProgram); |
| GR_GL_GET_PROC(CreateShader); |
| gDefaultInterface.fCullFace = glCullFace; |
| GR_GL_GET_PROC(DeleteBuffers); |
| GR_GL_GET_PROC(DeleteProgram); |
| GR_GL_GET_PROC(DeleteShader); |
| gDefaultInterface.fDeleteTextures = glDeleteTextures; |
| gDefaultInterface.fDepthMask = glDepthMask; |
| gDefaultInterface.fDisable = glDisable; |
| gDefaultInterface.fDisableClientState = glDisableClientState; |
| GR_GL_GET_PROC(DisableVertexAttribArray); |
| gDefaultInterface.fDrawArrays = glDrawArrays; |
| gDefaultInterface.fDrawElements = glDrawElements; |
| gDefaultInterface.fEnable = glEnable; |
| gDefaultInterface.fEnableClientState = glEnableClientState; |
| GR_GL_GET_PROC(EnableVertexAttribArray); |
| gDefaultInterface.fFrontFace = glFrontFace; |
| GR_GL_GET_PROC(GenBuffers); |
| GR_GL_GET_PROC(GetBufferParameteriv); |
| gDefaultInterface.fGetError = glGetError; |
| gDefaultInterface.fGetIntegerv = glGetIntegerv; |
| GR_GL_GET_PROC(GetProgramInfoLog); |
| GR_GL_GET_PROC(GetProgramiv); |
| GR_GL_GET_PROC(GetShaderInfoLog); |
| GR_GL_GET_PROC(GetShaderiv); |
| gDefaultInterface.fGetString = glGetString; |
| gDefaultInterface.fGenTextures = glGenTextures; |
| GR_GL_GET_PROC(GetUniformLocation); |
| gDefaultInterface.fLineWidth = glLineWidth; |
| GR_GL_GET_PROC(LinkProgram); |
| gDefaultInterface.fLoadMatrixf = glLoadMatrixf; |
| GR_GL_GET_PROC(MapBuffer); |
| gDefaultInterface.fMatrixMode = glMatrixMode; |
| gDefaultInterface.fPointSize = glPointSize; |
| gDefaultInterface.fPixelStorei = glPixelStorei; |
| gDefaultInterface.fReadPixels = glReadPixels; |
| gDefaultInterface.fScissor = glScissor; |
| gDefaultInterface.fShadeModel = glShadeModel; |
| GR_GL_GET_PROC(ShaderSource); |
| gDefaultInterface.fStencilFunc = glStencilFunc; |
| GR_GL_GET_PROC(StencilFuncSeparate); |
| gDefaultInterface.fStencilMask = glStencilMask; |
| GR_GL_GET_PROC(StencilMaskSeparate); |
| gDefaultInterface.fStencilOp = glStencilOp; |
| GR_GL_GET_PROC(StencilOpSeparate); |
| gDefaultInterface.fTexCoordPointer = glTexCoordPointer; |
| gDefaultInterface.fTexEnvi = glTexEnvi; |
| //OSMesa on Mac's glTexImage2D takes a GLenum for internalFormat rather than a GLint. |
| gDefaultInterface.fTexImage2D = reinterpret_cast<GrGLTexImage2DProc>(glTexImage2D); |
| gDefaultInterface.fTexParameteri = glTexParameteri; |
| gDefaultInterface.fTexSubImage2D = glTexSubImage2D; |
| GR_GL_GET_PROC(Uniform1f); |
| GR_GL_GET_PROC(Uniform1i); |
| GR_GL_GET_PROC(Uniform1fv); |
| GR_GL_GET_PROC(Uniform1iv); |
| GR_GL_GET_PROC(Uniform2f); |
| GR_GL_GET_PROC(Uniform2i); |
| GR_GL_GET_PROC(Uniform2fv); |
| GR_GL_GET_PROC(Uniform2iv); |
| GR_GL_GET_PROC(Uniform3f); |
| GR_GL_GET_PROC(Uniform3i); |
| GR_GL_GET_PROC(Uniform3fv); |
| GR_GL_GET_PROC(Uniform3iv); |
| GR_GL_GET_PROC(Uniform4f); |
| GR_GL_GET_PROC(Uniform4i); |
| GR_GL_GET_PROC(Uniform4fv); |
| GR_GL_GET_PROC(Uniform4iv); |
| GR_GL_GET_PROC(UniformMatrix2fv); |
| GR_GL_GET_PROC(UniformMatrix3fv); |
| GR_GL_GET_PROC(UniformMatrix4fv); |
| GR_GL_GET_PROC(UnmapBuffer); |
| GR_GL_GET_PROC(UseProgram); |
| GR_GL_GET_PROC(VertexAttrib4fv); |
| GR_GL_GET_PROC(VertexAttribPointer); |
| gDefaultInterface.fVertexPointer = glVertexPointer; |
| gDefaultInterface.fViewport = glViewport; |
| |
| // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since |
| // GL_ARB_framebuffer_object doesn't use ARB suffix.) |
| if (major >= 3 || has_gl_extension_from_string( |
| "GL_ARB_framebuffer_object", extString)) { |
| GR_GL_GET_PROC(GenFramebuffers); |
| GR_GL_GET_PROC(BindFramebuffer); |
| GR_GL_GET_PROC(FramebufferTexture2D); |
| GR_GL_GET_PROC(CheckFramebufferStatus); |
| GR_GL_GET_PROC(DeleteFramebuffers); |
| GR_GL_GET_PROC(RenderbufferStorage); |
| GR_GL_GET_PROC(GenRenderbuffers); |
| GR_GL_GET_PROC(DeleteRenderbuffers); |
| GR_GL_GET_PROC(FramebufferRenderbuffer); |
| GR_GL_GET_PROC(BindRenderbuffer); |
| GR_GL_GET_PROC(RenderbufferStorageMultisample); |
| GR_GL_GET_PROC(BlitFramebuffer); |
| } else if (has_gl_extension_from_string("GL_EXT_framebuffer_object", |
| extString)) { |
| GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT); |
| GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT); |
| GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT); |
| GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT); |
| GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT); |
| GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT); |
| GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT); |
| GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT); |
| GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT); |
| GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT); |
| if (has_gl_extension_from_string("GL_EXT_framebuffer_multisample", |
| extString)) { |
| GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT); |
| } |
| if (has_gl_extension_from_string("GL_EXT_framebuffer_blit", |
| extString)) { |
| GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT); |
| } |
| } else { |
| // we must have FBOs |
| return; |
| } |
| GR_GL_GET_PROC(BindFragDataLocationIndexed); |
| gDefaultInterface.fBindingsExported = kDesktop_GrGLBinding; |
| |
| gDefaultInterfaceInit = true; |
| } |
| if (gDefaultInterfaceInit) |
| GrGLSetGLInterface(&gDefaultInterface); |
| } |
