1 /* 2 * Copyright 2011 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 8 9 #include "gl/GrGLInterface.h" 10 #include "GrGLDefines.h" 11 #include "SkTDArray.h" 12 13 namespace { // added to suppress 'no previous prototype' warning 14 15 GrGLvoid GR_GL_FUNCTION_TYPE nullGLActiveTexture(GrGLenum texture) {} 16 GrGLvoid GR_GL_FUNCTION_TYPE nullGLAttachShader(GrGLuint program, GrGLuint shader) {} 17 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBeginQuery(GrGLenum target, GrGLuint id) {} 18 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindAttribLocation(GrGLuint program, GrGLuint index, const char* name) {} 19 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindTexture(GrGLenum target, GrGLuint texture) {} 20 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendColor(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha) {} 21 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFragDataLocation(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name) {} 22 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendFunc(GrGLenum sfactor, GrGLenum dfactor) {} 23 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferData(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage) {} 24 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferSubData(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data) {} 25 GrGLvoid GR_GL_FUNCTION_TYPE nullGLClear(GrGLbitfield mask) {} 26 GrGLvoid GR_GL_FUNCTION_TYPE nullGLClearColor(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha) {} 27 GrGLvoid GR_GL_FUNCTION_TYPE nullGLClearStencil(GrGLint s) {} 28 GrGLvoid GR_GL_FUNCTION_TYPE nullGLColorMask(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha) {} 29 GrGLvoid GR_GL_FUNCTION_TYPE nullGLCompileShader(GrGLuint shader) {} 30 GrGLvoid GR_GL_FUNCTION_TYPE nullGLCompressedTexImage2D(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data) {} 31 GrGLvoid GR_GL_FUNCTION_TYPE nullGLCullFace(GrGLenum mode) {} 32 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDepthMask(GrGLboolean flag) {} 33 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDisable(GrGLenum cap) {} 34 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDisableVertexAttribArray(GrGLuint index) {} 35 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawArrays(GrGLenum mode, GrGLint first, GrGLsizei count) {} 36 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawBuffer(GrGLenum mode) {} 37 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawBuffers(GrGLsizei n, const GrGLenum* bufs) {} 38 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawElements(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices) {} 39 GrGLvoid GR_GL_FUNCTION_TYPE nullGLEnable(GrGLenum cap) {} 40 GrGLvoid GR_GL_FUNCTION_TYPE nullGLEnableVertexAttribArray(GrGLuint index) {} 41 GrGLvoid GR_GL_FUNCTION_TYPE nullGLEndQuery(GrGLenum target) {} 42 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFinish() {} 43 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFlush() {} 44 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFrontFace(GrGLenum mode) {} 45 GrGLvoid GR_GL_FUNCTION_TYPE nullGLLineWidth(GrGLfloat width) {} 46 GrGLvoid GR_GL_FUNCTION_TYPE nullGLLinkProgram(GrGLuint program) {} 47 GrGLvoid GR_GL_FUNCTION_TYPE nullGLPixelStorei(GrGLenum pname, GrGLint param) {} 48 GrGLvoid GR_GL_FUNCTION_TYPE nullGLQueryCounter(GrGLuint id, GrGLenum target) {} 49 GrGLvoid GR_GL_FUNCTION_TYPE nullGLReadBuffer(GrGLenum src) {} 50 GrGLvoid GR_GL_FUNCTION_TYPE nullGLReadPixels(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels) {} 51 GrGLvoid GR_GL_FUNCTION_TYPE nullGLScissor(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height) {} 52 #if GR_USE_NEW_GL_SHADER_SOURCE_SIGNATURE 53 GrGLvoid GR_GL_FUNCTION_TYPE nullGLShaderSource(GrGLuint shader, GrGLsizei count, const char* const * str, const GrGLint* length) {} 54 #else 55 GrGLvoid GR_GL_FUNCTION_TYPE nullGLShaderSource(GrGLuint shader, GrGLsizei count, const char** str, const GrGLint* length) {} 56 #endif 57 GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilFunc(GrGLenum func, GrGLint ref, GrGLuint mask) {} 58 GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilFuncSeparate(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask) {} 59 GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilMask(GrGLuint mask) {} 60 GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilMaskSeparate(GrGLenum face, GrGLuint mask) {} 61 GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilOp(GrGLenum fail, GrGLenum zfail, GrGLenum zpass) {} 62 GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilOpSeparate(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass) {} 63 GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexImage2D(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels) {} 64 GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexParameteri(GrGLenum target, GrGLenum pname, GrGLint param) {} 65 GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexParameteriv(GrGLenum target, GrGLenum pname, const GrGLint* params) {} 66 GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexStorage2D(GrGLenum target, GrGLsizei levels, GrGLenum internalformat, GrGLsizei width, GrGLsizei height) {} 67 GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexSubImage2D(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels) {} 68 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1f(GrGLint location, GrGLfloat v0) {} 69 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1i(GrGLint location, GrGLint v0) {} 70 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {} 71 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1iv(GrGLint location, GrGLsizei count, const GrGLint* v) {} 72 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2f(GrGLint location, GrGLfloat v0, GrGLfloat v1) {} 73 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2i(GrGLint location, GrGLint v0, GrGLint v1) {} 74 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {} 75 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2iv(GrGLint location, GrGLsizei count, const GrGLint* v) {} 76 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3f(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2) {} 77 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3i(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2) {} 78 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {} 79 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3iv(GrGLint location, GrGLsizei count, const GrGLint* v) {} 80 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4f(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3) {} 81 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4i(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3) {} 82 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {} 83 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4iv(GrGLint location, GrGLsizei count, const GrGLint* v) {} 84 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniformMatrix2fv(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value) {} 85 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniformMatrix3fv(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value) {} 86 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniformMatrix4fv(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value) {} 87 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUseProgram(GrGLuint program) {} 88 GrGLvoid GR_GL_FUNCTION_TYPE nullGLVertexAttrib4fv(GrGLuint indx, const GrGLfloat* values) {} 89 GrGLvoid GR_GL_FUNCTION_TYPE nullGLVertexAttribPointer(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr) {} 90 GrGLvoid GR_GL_FUNCTION_TYPE nullGLViewport(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height) {} 91 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFramebuffer(GrGLenum target, GrGLuint framebuffer) {} 92 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindRenderbuffer(GrGLenum target, GrGLuint renderbuffer) {} 93 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteFramebuffers(GrGLsizei n, const GrGLuint *framebuffers) {} 94 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteRenderbuffers(GrGLsizei n, const GrGLuint *renderbuffers) {} 95 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferRenderbuffer(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer) {} 96 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferTexture2D(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level) {} 97 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetFramebufferAttachmentParameteriv(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params) {} 98 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetRenderbufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) {} 99 GrGLvoid GR_GL_FUNCTION_TYPE nullGLRenderbufferStorage(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height) {} 100 GrGLvoid GR_GL_FUNCTION_TYPE nullGLRenderbufferStorageMultisample(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height) {} 101 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlitFramebuffer(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter) {} 102 GrGLvoid GR_GL_FUNCTION_TYPE nullGLResolveMultisampleFramebuffer() {} 103 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFragDataLocationIndexed(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar * name) {} 104 105 GrGLenum GR_GL_FUNCTION_TYPE nullGLCheckFramebufferStatus(GrGLenum target) { 106 return GR_GL_FRAMEBUFFER_COMPLETE; 107 } 108 109 GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateProgram() { 110 static int gCurrID = 0; 111 return ++gCurrID; 112 } 113 114 GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateShader(GrGLenum type) { 115 static int gCurrID = 0; 116 return ++gCurrID; 117 } 118 119 // same delete used for shaders and programs 120 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDelete(GrGLuint program) { 121 } 122 123 // same function used for all glGen*(GLsize i, GLuint*) functions 124 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGenIds(GrGLsizei n, GrGLuint* ids) { 125 static int gCurrID = 0; 126 for (int i = 0; i < n; ++i) { 127 ids[i] = ++gCurrID; 128 } 129 } 130 // same delete function for all glDelete*(GLsize i, const GLuint*) except buffers 131 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteIds(GrGLsizei n, const GrGLuint* ids) {} 132 133 // In debug builds we do asserts that ensure we agree with GL about when a buffer 134 // is mapped. 135 static SkTDArray<GrGLuint> gMappedBuffers; 136 static GrGLuint gCurrArrayBuffer; 137 static GrGLuint gCurrElementArrayBuffer; 138 139 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindBuffer(GrGLenum target, GrGLuint buffer) { 140 switch (target) { 141 case GR_GL_ARRAY_BUFFER: 142 gCurrArrayBuffer = buffer; 143 break; 144 case GR_GL_ELEMENT_ARRAY_BUFFER: 145 gCurrElementArrayBuffer = buffer; 146 break; 147 } 148 } 149 150 // deleting a bound buffer has the side effect of binding 0 151 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteBuffers(GrGLsizei n, const GrGLuint* ids) { 152 for (int i = 0; i < n; ++i) { 153 if (ids[i] == gCurrArrayBuffer) { 154 gCurrArrayBuffer = 0; 155 } 156 if (ids[i] == gCurrElementArrayBuffer) { 157 gCurrElementArrayBuffer = 0; 158 } 159 for (int j = 0; j < gMappedBuffers.count(); ++j) { 160 if (gMappedBuffers[j] == ids[i]) { 161 gMappedBuffers.remove(j); 162 // don't break b/c we didn't check for dupes on insert 163 --j; 164 } 165 } 166 } 167 } 168 169 GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBuffer(GrGLenum target, GrGLenum access) { 170 // We just reserve 32MB of RAM for all locks and hope its big enough 171 static SkAutoMalloc gBufferData(32 * (1 << 20)); 172 GrGLuint buf = 0; 173 switch (target) { 174 case GR_GL_ARRAY_BUFFER: 175 buf = gCurrArrayBuffer; 176 break; 177 case GR_GL_ELEMENT_ARRAY_BUFFER: 178 buf = gCurrElementArrayBuffer; 179 break; 180 } 181 if (buf) { 182 *gMappedBuffers.append() = buf; 183 } 184 return gBufferData.get(); 185 } 186 187 GrGLboolean GR_GL_FUNCTION_TYPE nullGLUnmapBuffer(GrGLenum target) { 188 GrGLuint buf = 0; 189 switch (target) { 190 case GR_GL_ARRAY_BUFFER: 191 buf = gCurrArrayBuffer; 192 break; 193 case GR_GL_ELEMENT_ARRAY_BUFFER: 194 buf = gCurrElementArrayBuffer; 195 break; 196 } 197 if (buf) { 198 for (int i = 0; i < gMappedBuffers.count(); ++i) { 199 if (gMappedBuffers[i] == buf) { 200 gMappedBuffers.remove(i); 201 // don't break b/c we didn't check for dupes on insert 202 --i; 203 } 204 } 205 } 206 return GR_GL_TRUE; 207 } 208 209 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetBufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) { 210 switch (pname) { 211 case GR_GL_BUFFER_MAPPED: { 212 *params = GR_GL_FALSE; 213 GrGLuint buf = 0; 214 switch (target) { 215 case GR_GL_ARRAY_BUFFER: 216 buf = gCurrArrayBuffer; 217 break; 218 case GR_GL_ELEMENT_ARRAY_BUFFER: 219 buf = gCurrElementArrayBuffer; 220 break; 221 } 222 if (buf) { 223 for (int i = 0; i < gMappedBuffers.count(); ++i) { 224 if (gMappedBuffers[i] == buf) { 225 *params = GR_GL_TRUE; 226 break; 227 } 228 } 229 } 230 break; } 231 default: 232 GrCrash("Unexpected pname to GetBufferParamateriv"); 233 break; 234 } 235 }; 236 237 GrGLenum GR_GL_FUNCTION_TYPE nullGLGetError() { 238 return GR_GL_NO_ERROR; 239 } 240 241 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetIntegerv(GrGLenum pname, GrGLint* params) { 242 switch (pname) { 243 case GR_GL_STENCIL_BITS: 244 *params = 8; 245 break; 246 case GR_GL_SAMPLES: 247 *params = 1; 248 break; 249 case GR_GL_FRAMEBUFFER_BINDING: 250 *params = 0; 251 break; 252 case GR_GL_VIEWPORT: 253 params[0] = 0; 254 params[1] = 0; 255 params[2] = 800; 256 params[3] = 600; 257 break; 258 case GR_GL_MAX_TEXTURE_IMAGE_UNITS: 259 *params = 8; 260 break; 261 case GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS: 262 *params = 16; 263 break; 264 case GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS: 265 *params = 16 * 4; 266 break; 267 case GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS: 268 *params = 0; 269 break; 270 case GR_GL_COMPRESSED_TEXTURE_FORMATS: 271 break; 272 case GR_GL_MAX_TEXTURE_SIZE: 273 *params = 8192; 274 break; 275 case GR_GL_MAX_RENDERBUFFER_SIZE: 276 *params = 8192; 277 break; 278 case GR_GL_MAX_SAMPLES: 279 *params = 32; 280 break; 281 case GR_GL_MAX_VERTEX_ATTRIBS: 282 *params = 16; 283 break; 284 default: 285 GrCrash("Unexpected pname to GetIntegerv"); 286 } 287 } 288 // used for both the program and shader info logs 289 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetInfoLog(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog) { 290 if (length) { 291 *length = 0; 292 } 293 if (bufsize > 0) { 294 *infolog = 0; 295 } 296 } 297 298 // used for both the program and shader params 299 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetShaderOrProgramiv(GrGLuint program, GrGLenum pname, GrGLint* params) { 300 switch (pname) { 301 case GR_GL_LINK_STATUS: // fallthru 302 case GR_GL_COMPILE_STATUS: 303 *params = GR_GL_TRUE; 304 break; 305 case GR_GL_INFO_LOG_LENGTH: 306 *params = 0; 307 break; 308 // we don't expect any other pnames 309 default: 310 GrCrash("Unexpected pname to GetProgramiv"); 311 break; 312 } 313 } 314 315 namespace { 316 template <typename T> 317 void query_result(GrGLenum GLtarget, GrGLenum pname, T *params) { 318 switch (pname) { 319 case GR_GL_QUERY_RESULT_AVAILABLE: 320 *params = GR_GL_TRUE; 321 break; 322 case GR_GL_QUERY_RESULT: 323 *params = 0; 324 break; 325 default: 326 GrCrash("Unexpected pname passed to GetQueryObject."); 327 break; 328 } 329 } 330 } 331 332 // Queries on the null GL just don't do anything at all. We could potentially make 333 // the timers work. 334 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryiv(GrGLenum GLtarget, GrGLenum pname, GrGLint *params) { 335 switch (pname) { 336 case GR_GL_CURRENT_QUERY: 337 *params = 0; 338 break; 339 case GR_GL_QUERY_COUNTER_BITS: 340 *params = 32; 341 break; 342 default: 343 GrCrash("Unexpected pname passed GetQueryiv."); 344 } 345 } 346 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjecti64v(GrGLuint id, GrGLenum pname, GrGLint64 *params) { 347 query_result(id, pname, params); 348 } 349 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjectiv(GrGLuint id, GrGLenum pname, GrGLint *params) { 350 query_result(id, pname, params); 351 } 352 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjectui64v(GrGLuint id, GrGLenum pname, GrGLuint64 *params) { 353 query_result(id, pname, params); 354 } 355 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjectuiv(GrGLuint id, GrGLenum pname, GrGLuint *params) { 356 query_result(id, pname, params); 357 } 358 359 const GrGLubyte* GR_GL_FUNCTION_TYPE nullGLGetString(GrGLenum name) { 360 switch (name) { 361 case GR_GL_EXTENSIONS: 362 return (const GrGLubyte*)"GL_ARB_framebuffer_object GL_ARB_blend_func_extended GL_ARB_timer_query GL_ARB_draw_buffers GL_ARB_occlusion_query GL_EXT_blend_color GL_EXT_stencil_wrap"; 363 case GR_GL_VERSION: 364 return (const GrGLubyte*)"4.0 Null GL"; 365 case GR_GL_SHADING_LANGUAGE_VERSION: 366 return (const GrGLubyte*)"4.20.8 Null GLSL"; 367 case GR_GL_VENDOR: 368 return (const GrGLubyte*)"Null Vendor"; 369 case GR_GL_RENDERER: 370 return (const GrGLubyte*)"The Null (Non-)Renderer"; 371 default: 372 GrCrash("Unexpected name to GetString"); 373 return NULL; 374 } 375 } 376 377 // we used to use this to query stuff about externally created textures, now we just 378 // require clients to tell us everything about the texture. 379 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetTexLevelParameteriv(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params) { 380 GrCrash("Should never query texture parameters."); 381 } 382 383 GrGLint GR_GL_FUNCTION_TYPE nullGLGetUniformLocation(GrGLuint program, const char* name) { 384 static int gUniLocation = 0; 385 return ++gUniLocation; 386 } 387 388 } // end anonymous namespace 389 390 const GrGLInterface* GrGLCreateNullInterface() { 391 // The gl functions are not context-specific so we create one global 392 // interface 393 static SkAutoTUnref<GrGLInterface> glInterface; 394 if (!glInterface.get()) { 395 GrGLInterface* interface = SkNEW(GrGLInterface); 396 glInterface.reset(interface); 397 interface->fBindingsExported = kDesktop_GrGLBinding; 398 interface->fActiveTexture = nullGLActiveTexture; 399 interface->fAttachShader = nullGLAttachShader; 400 interface->fBeginQuery = nullGLBeginQuery; 401 interface->fBindAttribLocation = nullGLBindAttribLocation; 402 interface->fBindBuffer = nullGLBindBuffer; 403 interface->fBindFragDataLocation = nullGLBindFragDataLocation; 404 interface->fBindTexture = nullGLBindTexture; 405 interface->fBlendColor = nullGLBlendColor; 406 interface->fBlendFunc = nullGLBlendFunc; 407 interface->fBufferData = nullGLBufferData; 408 interface->fBufferSubData = nullGLBufferSubData; 409 interface->fClear = nullGLClear; 410 interface->fClearColor = nullGLClearColor; 411 interface->fClearStencil = nullGLClearStencil; 412 interface->fColorMask = nullGLColorMask; 413 interface->fCompileShader = nullGLCompileShader; 414 interface->fCompressedTexImage2D = nullGLCompressedTexImage2D; 415 interface->fCreateProgram = nullGLCreateProgram; 416 interface->fCreateShader = nullGLCreateShader; 417 interface->fCullFace = nullGLCullFace; 418 interface->fDeleteBuffers = nullGLDeleteBuffers; 419 interface->fDeleteProgram = nullGLDelete; 420 interface->fDeleteQueries = nullGLDeleteIds; 421 interface->fDeleteShader = nullGLDelete; 422 interface->fDeleteTextures = nullGLDeleteIds; 423 interface->fDepthMask = nullGLDepthMask; 424 interface->fDisable = nullGLDisable; 425 interface->fDisableVertexAttribArray = nullGLDisableVertexAttribArray; 426 interface->fDrawArrays = nullGLDrawArrays; 427 interface->fDrawBuffer = nullGLDrawBuffer; 428 interface->fDrawBuffers = nullGLDrawBuffers; 429 interface->fDrawElements = nullGLDrawElements; 430 interface->fEnable = nullGLEnable; 431 interface->fEnableVertexAttribArray = nullGLEnableVertexAttribArray; 432 interface->fEndQuery = nullGLEndQuery; 433 interface->fFinish = nullGLFinish; 434 interface->fFlush = nullGLFlush; 435 interface->fFrontFace = nullGLFrontFace; 436 interface->fGenBuffers = nullGLGenIds; 437 interface->fGenQueries = nullGLGenIds; 438 interface->fGenTextures = nullGLGenIds; 439 interface->fGetBufferParameteriv = nullGLGetBufferParameteriv; 440 interface->fGetError = nullGLGetError; 441 interface->fGetIntegerv = nullGLGetIntegerv; 442 interface->fGetQueryObjecti64v = nullGLGetQueryObjecti64v; 443 interface->fGetQueryObjectiv = nullGLGetQueryObjectiv; 444 interface->fGetQueryObjectui64v = nullGLGetQueryObjectui64v; 445 interface->fGetQueryObjectuiv = nullGLGetQueryObjectuiv; 446 interface->fGetQueryiv = nullGLGetQueryiv; 447 interface->fGetProgramInfoLog = nullGLGetInfoLog; 448 interface->fGetProgramiv = nullGLGetShaderOrProgramiv; 449 interface->fGetShaderInfoLog = nullGLGetInfoLog; 450 interface->fGetShaderiv = nullGLGetShaderOrProgramiv; 451 interface->fGetString = nullGLGetString; 452 interface->fGetTexLevelParameteriv = nullGLGetTexLevelParameteriv; 453 interface->fGetUniformLocation = nullGLGetUniformLocation; 454 interface->fLineWidth = nullGLLineWidth; 455 interface->fLinkProgram = nullGLLinkProgram; 456 interface->fPixelStorei = nullGLPixelStorei; 457 interface->fQueryCounter = nullGLQueryCounter; 458 interface->fReadBuffer = nullGLReadBuffer; 459 interface->fReadPixels = nullGLReadPixels; 460 interface->fScissor = nullGLScissor; 461 interface->fShaderSource = nullGLShaderSource; 462 interface->fStencilFunc = nullGLStencilFunc; 463 interface->fStencilFuncSeparate = nullGLStencilFuncSeparate; 464 interface->fStencilMask = nullGLStencilMask; 465 interface->fStencilMaskSeparate = nullGLStencilMaskSeparate; 466 interface->fStencilOp = nullGLStencilOp; 467 interface->fStencilOpSeparate = nullGLStencilOpSeparate; 468 interface->fTexImage2D = nullGLTexImage2D; 469 interface->fTexParameteri = nullGLTexParameteri; 470 interface->fTexParameteriv = nullGLTexParameteriv; 471 interface->fTexSubImage2D = nullGLTexSubImage2D; 472 interface->fTexStorage2D = nullGLTexStorage2D; 473 interface->fUniform1f = nullGLUniform1f; 474 interface->fUniform1i = nullGLUniform1i; 475 interface->fUniform1fv = nullGLUniform1fv; 476 interface->fUniform1iv = nullGLUniform1iv; 477 interface->fUniform2f = nullGLUniform2f; 478 interface->fUniform2i = nullGLUniform2i; 479 interface->fUniform2fv = nullGLUniform2fv; 480 interface->fUniform2iv = nullGLUniform2iv; 481 interface->fUniform3f = nullGLUniform3f; 482 interface->fUniform3i = nullGLUniform3i; 483 interface->fUniform3fv = nullGLUniform3fv; 484 interface->fUniform3iv = nullGLUniform3iv; 485 interface->fUniform4f = nullGLUniform4f; 486 interface->fUniform4i = nullGLUniform4i; 487 interface->fUniform4fv = nullGLUniform4fv; 488 interface->fUniform4iv = nullGLUniform4iv; 489 interface->fUniformMatrix2fv = nullGLUniformMatrix2fv; 490 interface->fUniformMatrix3fv = nullGLUniformMatrix3fv; 491 interface->fUniformMatrix4fv = nullGLUniformMatrix4fv; 492 interface->fUseProgram = nullGLUseProgram; 493 interface->fVertexAttrib4fv = nullGLVertexAttrib4fv; 494 interface->fVertexAttribPointer = nullGLVertexAttribPointer; 495 interface->fViewport = nullGLViewport; 496 interface->fBindFramebuffer = nullGLBindFramebuffer; 497 interface->fBindRenderbuffer = nullGLBindRenderbuffer; 498 interface->fCheckFramebufferStatus = nullGLCheckFramebufferStatus; 499 interface->fDeleteFramebuffers = nullGLDeleteFramebuffers; 500 interface->fDeleteRenderbuffers = nullGLDeleteRenderbuffers; 501 interface->fFramebufferRenderbuffer = nullGLFramebufferRenderbuffer; 502 interface->fFramebufferTexture2D = nullGLFramebufferTexture2D; 503 interface->fGenFramebuffers = nullGLGenIds; 504 interface->fGenRenderbuffers = nullGLGenIds; 505 interface->fGetFramebufferAttachmentParameteriv = nullGLGetFramebufferAttachmentParameteriv; 506 interface->fGetRenderbufferParameteriv = nullGLGetRenderbufferParameteriv; 507 interface->fRenderbufferStorage = nullGLRenderbufferStorage; 508 interface->fRenderbufferStorageMultisample = nullGLRenderbufferStorageMultisample; 509 interface->fBlitFramebuffer = nullGLBlitFramebuffer; 510 interface->fResolveMultisampleFramebuffer = nullGLResolveMultisampleFramebuffer; 511 interface->fMapBuffer = nullGLMapBuffer; 512 interface->fUnmapBuffer = nullGLUnmapBuffer; 513 interface->fBindFragDataLocationIndexed = nullGLBindFragDataLocationIndexed; 514 } 515 glInterface.get()->ref(); 516 return glInterface.get(); 517 } 518
