1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10 #include "gl/GrGLInterface.h"
11
12 #include <GL/glx.h>
13 #include <GL/gl.h>
14 #include <GL/glext.h>
15 #include <GL/glu.h>
16
17 #define GR_GL_GET_PROC(F) interface->f ## F = (GrGL ## F ## Proc) \
18 glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F));
19 #define GR_GL_GET_PROC_SUFFIX(F, S) interface->f ## F = (GrGL ## F ## Proc) \
20 glXGetProcAddress(reinterpret_cast<const GLubyte*>("gl" #F #S));
21
GrGLCreateNativeInterface()22 const GrGLInterface* GrGLCreateNativeInterface() {
23 if (NULL != glXGetCurrentContext()) {
24 const char* versionString = (const char*) glGetString(GL_VERSION);
25 const char* extString = (const char*) glGetString(GL_EXTENSIONS);
26 GrGLVersion glVer = GrGLGetVersionFromString(versionString);
27
28 if (glVer < GR_GL_VER(1,5)) {
29 // We must have array and element_array buffer objects.
30 return NULL;
31 }
32
33 GrGLInterface* interface = new GrGLInterface();
34
35 interface->fActiveTexture = glActiveTexture;
36 GR_GL_GET_PROC(AttachShader);
37 GR_GL_GET_PROC(BindAttribLocation);
38 GR_GL_GET_PROC(BindBuffer);
39 GR_GL_GET_PROC(BindFragDataLocation);
40 GR_GL_GET_PROC(BeginQuery);
41 interface->fBindTexture = glBindTexture;
42 interface->fBlendColor = glBlendColor;
43 interface->fBlendFunc = glBlendFunc;
44 GR_GL_GET_PROC(BufferData);
45 GR_GL_GET_PROC(BufferSubData);
46 interface->fClear = glClear;
47 interface->fClearColor = glClearColor;
48 interface->fClearStencil = glClearStencil;
49 interface->fColorMask = glColorMask;
50 interface->fColorPointer = glColorPointer;
51 GR_GL_GET_PROC(CompileShader);
52 interface->fCompressedTexImage2D = glCompressedTexImage2D;
53 GR_GL_GET_PROC(CreateProgram);
54 GR_GL_GET_PROC(CreateShader);
55 interface->fCullFace = glCullFace;
56 GR_GL_GET_PROC(DeleteBuffers);
57 GR_GL_GET_PROC(DeleteProgram);
58 GR_GL_GET_PROC(DeleteQueries);
59 GR_GL_GET_PROC(DeleteShader);
60 interface->fDeleteTextures = glDeleteTextures;
61 interface->fDepthMask = glDepthMask;
62 interface->fDisable = glDisable;
63 GR_GL_GET_PROC(DisableVertexAttribArray);
64 interface->fDrawArrays = glDrawArrays;
65 interface->fDrawBuffer = glDrawBuffer;
66 GR_GL_GET_PROC(DrawBuffers);
67 interface->fDrawElements = glDrawElements;
68 interface->fEnable = glEnable;
69 GR_GL_GET_PROC(EnableVertexAttribArray);
70 GR_GL_GET_PROC(EndQuery);
71 interface->fFinish = glFinish;
72 interface->fFlush = glFlush;
73 interface->fFrontFace = glFrontFace;
74 GR_GL_GET_PROC(GenBuffers);
75 GR_GL_GET_PROC(GetBufferParameteriv);
76 interface->fGetError = glGetError;
77 interface->fGetIntegerv = glGetIntegerv;
78 GR_GL_GET_PROC(GetQueryObjectiv);
79 GR_GL_GET_PROC(GetQueryObjectuiv);
80 if (glVer >= GR_GL_VER(3,3) ||
81 GrGLHasExtensionFromString("GL_ARB_timer_query", extString)) {
82 GR_GL_GET_PROC(GetQueryObjecti64v);
83 GR_GL_GET_PROC(GetQueryObjectui64v);
84 GR_GL_GET_PROC(QueryCounter);
85 } else if (GrGLHasExtensionFromString("GL_EXT_timer_query", extString)) {
86 GR_GL_GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
87 GR_GL_GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
88 }
89 GR_GL_GET_PROC(GetQueryiv);
90 GR_GL_GET_PROC(GetProgramInfoLog);
91 GR_GL_GET_PROC(GetProgramiv);
92 GR_GL_GET_PROC(GetShaderInfoLog);
93 GR_GL_GET_PROC(GetShaderiv);
94 interface->fGetString = glGetString;
95 interface->fGetTexLevelParameteriv = glGetTexLevelParameteriv;
96 GR_GL_GET_PROC(GenQueries);
97 interface->fGenTextures = glGenTextures;
98 GR_GL_GET_PROC(GetUniformLocation);
99 interface->fLineWidth = glLineWidth;
100 GR_GL_GET_PROC(LinkProgram);
101 GR_GL_GET_PROC(MapBuffer);
102 interface->fPixelStorei = glPixelStorei;
103 interface->fReadBuffer = glReadBuffer;
104 interface->fReadPixels = glReadPixels;
105 interface->fScissor = glScissor;
106 GR_GL_GET_PROC(ShaderSource);
107 interface->fStencilFunc = glStencilFunc;
108 GR_GL_GET_PROC(StencilFuncSeparate);
109 interface->fStencilMask = glStencilMask;
110 GR_GL_GET_PROC(StencilMaskSeparate);
111 interface->fStencilOp = glStencilOp;
112 GR_GL_GET_PROC(StencilOpSeparate);
113 interface->fTexImage2D = glTexImage2D;
114 interface->fTexParameteri = glTexParameteri;
115 if (glVer >= GR_GL_VER(4,2) ||
116 GrGLHasExtensionFromString("GL_ARB_texture_storage", extString)) {
117 GR_GL_GET_PROC(TexStorage2D);
118 } else if (GrGLHasExtensionFromString("GL_EXT_texture_storage", extString)) {
119 GR_GL_GET_PROC_SUFFIX(TexStorage2D, EXT);
120 }
121 interface->fTexSubImage2D = glTexSubImage2D;
122 GR_GL_GET_PROC(Uniform1f);
123 GR_GL_GET_PROC(Uniform1i);
124 GR_GL_GET_PROC(Uniform1fv);
125 GR_GL_GET_PROC(Uniform1iv);
126 GR_GL_GET_PROC(Uniform2f);
127 GR_GL_GET_PROC(Uniform2i);
128 GR_GL_GET_PROC(Uniform2fv);
129 GR_GL_GET_PROC(Uniform2iv);
130 GR_GL_GET_PROC(Uniform3f);
131 GR_GL_GET_PROC(Uniform3i);
132 GR_GL_GET_PROC(Uniform3fv);
133 GR_GL_GET_PROC(Uniform3iv);
134 GR_GL_GET_PROC(Uniform4f);
135 GR_GL_GET_PROC(Uniform4i);
136 GR_GL_GET_PROC(Uniform4fv);
137 GR_GL_GET_PROC(Uniform4iv);
138 GR_GL_GET_PROC(UniformMatrix2fv);
139 GR_GL_GET_PROC(UniformMatrix3fv);
140 GR_GL_GET_PROC(UniformMatrix4fv);
141 GR_GL_GET_PROC(UnmapBuffer);
142 GR_GL_GET_PROC(UseProgram);
143 GR_GL_GET_PROC(VertexAttrib4fv);
144 GR_GL_GET_PROC(VertexAttribPointer);
145 interface->fViewport = glViewport;
146 GR_GL_GET_PROC(BindFragDataLocationIndexed);
147
148 // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since
149 // GL_ARB_framebuffer_object doesn't use ARB suffix.)
150 if (glVer >= GR_GL_VER(3,0) ||
151 GrGLHasExtensionFromString("GL_ARB_framebuffer_object",
152 extString)) {
153 GR_GL_GET_PROC(GenFramebuffers);
154 GR_GL_GET_PROC(GetFramebufferAttachmentParameteriv);
155 GR_GL_GET_PROC(GetRenderbufferParameteriv);
156 GR_GL_GET_PROC(BindFramebuffer);
157 GR_GL_GET_PROC(FramebufferTexture2D);
158 GR_GL_GET_PROC(CheckFramebufferStatus);
159 GR_GL_GET_PROC(DeleteFramebuffers);
160 GR_GL_GET_PROC(RenderbufferStorage);
161 GR_GL_GET_PROC(GenRenderbuffers);
162 GR_GL_GET_PROC(DeleteRenderbuffers);
163 GR_GL_GET_PROC(FramebufferRenderbuffer);
164 GR_GL_GET_PROC(BindRenderbuffer);
165 GR_GL_GET_PROC(RenderbufferStorageMultisample);
166 GR_GL_GET_PROC(BlitFramebuffer);
167 } else if (GrGLHasExtensionFromString("GL_EXT_framebuffer_object",
168 extString)) {
169 GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT);
170 GR_GL_GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT);
171 GR_GL_GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT);
172 GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT);
173 GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT);
174 GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
175 GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT);
176 GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT);
177 GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT);
178 GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
179 GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
180 GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT);
181 if (GrGLHasExtensionFromString("GL_EXT_framebuffer_multisample",
182 extString)) {
183 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
184 }
185 if (GrGLHasExtensionFromString("GL_EXT_framebuffer_blit",
186 extString)) {
187 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT);
188 }
189 } else {
190 // we must have FBOs
191 delete interface;
192 return NULL;
193 }
194 interface->fBindingsExported = kDesktop_GrGLBinding;
195
196 return interface;
197 } else {
198 return NULL;
199 }
200 }
201