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 #include "gl/GrGLExtensions.h"
10 #include "gl/GrGLInterface.h"
11 #include "../GrGLUtil.h"
12
13 #define GL_GLEXT_PROTOTYPES
14 #include "osmesa_wrapper.h"
15
16 #define GR_GL_GET_PROC(F) interface->f ## F = (GrGL ## F ## Proc) \
17 OSMesaGetProcAddress("gl" #F);
18 #define GR_GL_GET_PROC_SUFFIX(F, S) interface->f ## F = (GrGL ## F ## Proc) \
19 OSMesaGetProcAddress("gl" #F #S);
20
21 // We use OSMesaGetProcAddress for every gl function to avoid accidentally using
22 // non-Mesa gl functions.
23
GrGLCreateMesaInterface()24 const GrGLInterface* GrGLCreateMesaInterface() {
25 if (NULL != OSMesaGetCurrentContext()) {
26
27 GrGLGetStringProc getString = (GrGLGetStringProc) OSMesaGetProcAddress("glGetString");
28 GrGLGetStringiProc getStringi = (GrGLGetStringiProc) OSMesaGetProcAddress("glGetStringi");
29 GrGLGetIntegervProc getIntegerv =
30 (GrGLGetIntegervProc) OSMesaGetProcAddress("glGetIntegerv");
31
32 GrGLExtensions extensions;
33 if (!extensions.init(kDesktop_GrGLBinding, getString, getStringi, getIntegerv)) {
34 return NULL;
35 }
36
37 const char* versionString = (const char*) getString(GL_VERSION);
38 GrGLVersion glVer = GrGLGetVersionFromString(versionString);
39
40 if (glVer < GR_GL_VER(1,5)) {
41 // We must have array and element_array buffer objects.
42 return NULL;
43 }
44 GrGLInterface* interface = new GrGLInterface();
45
46 GR_GL_GET_PROC(ActiveTexture);
47 GR_GL_GET_PROC(BeginQuery);
48 GR_GL_GET_PROC(AttachShader);
49 GR_GL_GET_PROC(BindAttribLocation);
50 GR_GL_GET_PROC(BindBuffer);
51 GR_GL_GET_PROC(BindFragDataLocation);
52 GR_GL_GET_PROC(BindTexture);
53 GR_GL_GET_PROC(BlendFunc);
54
55 if (glVer >= GR_GL_VER(1,4) ||
56 extensions.has("GL_ARB_imaging") ||
57 extensions.has("GL_EXT_blend_color")) {
58 GR_GL_GET_PROC(BlendColor);
59 }
60
61 GR_GL_GET_PROC(BufferData);
62 GR_GL_GET_PROC(BufferSubData);
63 GR_GL_GET_PROC(Clear);
64 GR_GL_GET_PROC(ClearColor);
65 GR_GL_GET_PROC(ClearStencil);
66 GR_GL_GET_PROC(ClientActiveTexture);
67 GR_GL_GET_PROC(ColorMask);
68 GR_GL_GET_PROC(CompileShader);
69 GR_GL_GET_PROC(CompressedTexImage2D);
70 GR_GL_GET_PROC(CopyTexSubImage2D);
71 GR_GL_GET_PROC(CreateProgram);
72 GR_GL_GET_PROC(CreateShader);
73 GR_GL_GET_PROC(CullFace);
74 GR_GL_GET_PROC(DeleteBuffers);
75 GR_GL_GET_PROC(DeleteProgram);
76 GR_GL_GET_PROC(DeleteQueries);
77 GR_GL_GET_PROC(DeleteShader);
78 GR_GL_GET_PROC(DeleteTextures);
79 GR_GL_GET_PROC(DepthMask);
80 GR_GL_GET_PROC(Disable);
81 GR_GL_GET_PROC(DisableClientState);
82 GR_GL_GET_PROC(DisableVertexAttribArray);
83 GR_GL_GET_PROC(DrawArrays);
84 GR_GL_GET_PROC(DrawBuffer);
85 GR_GL_GET_PROC(DrawBuffers);
86 GR_GL_GET_PROC(DrawElements);
87 GR_GL_GET_PROC(Enable);
88 GR_GL_GET_PROC(EnableClientState);
89 GR_GL_GET_PROC(EnableVertexAttribArray);
90 GR_GL_GET_PROC(EndQuery);
91 GR_GL_GET_PROC(Finish);
92 GR_GL_GET_PROC(Flush);
93 GR_GL_GET_PROC(FrontFace);
94 GR_GL_GET_PROC(GenBuffers);
95 GR_GL_GET_PROC(GenerateMipmap);
96 GR_GL_GET_PROC(GenQueries);
97 GR_GL_GET_PROC(GetBufferParameteriv);
98 GR_GL_GET_PROC(GetError);
99 GR_GL_GET_PROC(GetIntegerv);
100 GR_GL_GET_PROC(GetProgramInfoLog);
101 GR_GL_GET_PROC(GetProgramiv);
102 if (glVer >= GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) {
103 GR_GL_GET_PROC(GetQueryObjecti64v);
104 GR_GL_GET_PROC(GetQueryObjectui64v)
105 GR_GL_GET_PROC(QueryCounter);
106 } else if (extensions.has("GL_EXT_timer_query")) {
107 GR_GL_GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
108 GR_GL_GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
109 }
110 GR_GL_GET_PROC(GetQueryObjectiv);
111 GR_GL_GET_PROC(GetQueryObjectuiv);
112 GR_GL_GET_PROC(GetQueryiv);
113 GR_GL_GET_PROC(GetShaderInfoLog);
114 GR_GL_GET_PROC(GetShaderiv);
115 GR_GL_GET_PROC(GetString);
116 GR_GL_GET_PROC(GetStringi);
117 GR_GL_GET_PROC(GetTexLevelParameteriv);
118 GR_GL_GET_PROC(GenTextures);
119 GR_GL_GET_PROC(GetUniformLocation);
120 GR_GL_GET_PROC(LineWidth);
121 GR_GL_GET_PROC(LinkProgram);
122 GR_GL_GET_PROC(LoadIdentity);
123 GR_GL_GET_PROC(LoadMatrixf);
124 GR_GL_GET_PROC(MatrixMode);
125 GR_GL_GET_PROC(MapBuffer);
126 GR_GL_GET_PROC(PixelStorei);
127 GR_GL_GET_PROC(ReadBuffer);
128 GR_GL_GET_PROC(ReadPixels);
129 GR_GL_GET_PROC(Scissor);
130 GR_GL_GET_PROC(ShaderSource);
131 GR_GL_GET_PROC(StencilFunc);
132 GR_GL_GET_PROC(StencilFuncSeparate);
133 GR_GL_GET_PROC(StencilMask);
134 GR_GL_GET_PROC(StencilMaskSeparate);
135 GR_GL_GET_PROC(StencilOp);
136 GR_GL_GET_PROC(StencilOpSeparate);
137 GR_GL_GET_PROC(TexGenf);
138 GR_GL_GET_PROC(TexGenfv);
139 GR_GL_GET_PROC(TexGeni);
140 GR_GL_GET_PROC(TexImage2D)
141 GR_GL_GET_PROC(TexParameteri);
142 GR_GL_GET_PROC(TexParameteriv);
143 GR_GL_GET_PROC(TexStorage2D);
144 if (NULL == interface->fTexStorage2D) {
145 GR_GL_GET_PROC_SUFFIX(TexStorage2D, EXT);
146 }
147 GR_GL_GET_PROC(TexSubImage2D);
148 GR_GL_GET_PROC(Uniform1f);
149 GR_GL_GET_PROC(Uniform1i);
150 GR_GL_GET_PROC(Uniform1fv);
151 GR_GL_GET_PROC(Uniform1iv);
152 GR_GL_GET_PROC(Uniform2f);
153 GR_GL_GET_PROC(Uniform2i);
154 GR_GL_GET_PROC(Uniform2fv);
155 GR_GL_GET_PROC(Uniform2iv);
156 GR_GL_GET_PROC(Uniform3f);
157 GR_GL_GET_PROC(Uniform3i);
158 GR_GL_GET_PROC(Uniform3fv);
159 GR_GL_GET_PROC(Uniform3iv);
160 GR_GL_GET_PROC(Uniform4f);
161 GR_GL_GET_PROC(Uniform4i);
162 GR_GL_GET_PROC(Uniform4fv);
163 GR_GL_GET_PROC(Uniform4iv);
164 GR_GL_GET_PROC(UniformMatrix2fv);
165 GR_GL_GET_PROC(UniformMatrix3fv);
166 GR_GL_GET_PROC(UniformMatrix4fv);
167 GR_GL_GET_PROC(UnmapBuffer);
168 GR_GL_GET_PROC(UseProgram);
169 GR_GL_GET_PROC(VertexAttrib4fv);
170 GR_GL_GET_PROC(VertexAttribPointer);
171 GR_GL_GET_PROC(VertexPointer);
172 GR_GL_GET_PROC(Viewport);
173
174 if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
175 // no ARB suffix for GL_ARB_vertex_array_object
176 GR_GL_GET_PROC(BindVertexArray);
177 GR_GL_GET_PROC(DeleteVertexArrays);
178 GR_GL_GET_PROC(GenVertexArrays);
179 }
180
181 // First look for GL3.0 FBO or GL_ARB_framebuffer_object (same since
182 // GL_ARB_framebuffer_object doesn't use ARB suffix.)
183 if (glVer >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) {
184 GR_GL_GET_PROC(GenFramebuffers);
185 GR_GL_GET_PROC(GetFramebufferAttachmentParameteriv);
186 GR_GL_GET_PROC(GetRenderbufferParameteriv);
187 GR_GL_GET_PROC(BindFramebuffer);
188 GR_GL_GET_PROC(FramebufferTexture2D);
189 GR_GL_GET_PROC(CheckFramebufferStatus);
190 GR_GL_GET_PROC(DeleteFramebuffers);
191 GR_GL_GET_PROC(RenderbufferStorage);
192 GR_GL_GET_PROC(GenRenderbuffers);
193 GR_GL_GET_PROC(DeleteRenderbuffers);
194 GR_GL_GET_PROC(FramebufferRenderbuffer);
195 GR_GL_GET_PROC(BindRenderbuffer);
196 GR_GL_GET_PROC(RenderbufferStorageMultisample);
197 GR_GL_GET_PROC(BlitFramebuffer);
198 } else if (extensions.has("GL_EXT_framebuffer_object")) {
199 GR_GL_GET_PROC_SUFFIX(GenFramebuffers, EXT);
200 GR_GL_GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT);
201 GR_GL_GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT);
202 GR_GL_GET_PROC_SUFFIX(BindFramebuffer, EXT);
203 GR_GL_GET_PROC_SUFFIX(FramebufferTexture2D, EXT);
204 GR_GL_GET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
205 GR_GL_GET_PROC_SUFFIX(DeleteFramebuffers, EXT);
206 GR_GL_GET_PROC_SUFFIX(RenderbufferStorage, EXT);
207 GR_GL_GET_PROC_SUFFIX(GenRenderbuffers, EXT);
208 GR_GL_GET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
209 GR_GL_GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
210 GR_GL_GET_PROC_SUFFIX(BindRenderbuffer, EXT);
211 if (extensions.has("GL_EXT_framebuffer_multisample")) {
212 GR_GL_GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
213 }
214 if (extensions.has("GL_EXT_framebuffer_blit")) {
215 GR_GL_GET_PROC_SUFFIX(BlitFramebuffer, EXT);
216 }
217 } else {
218 // we must have FBOs
219 delete interface;
220 return NULL;
221 }
222 GR_GL_GET_PROC(BindFragDataLocationIndexed);
223 interface->fBindingsExported = kDesktop_GrGLBinding;
224 return interface;
225 } else {
226 return NULL;
227 }
228 }
229