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 #include "GrGLNoOpInterface.h" 13 14 // Functions not declared in GrGLBogusInterface.h (not common with the Debug GL interface). 15 16 namespace { // added to suppress 'no previous prototype' warning 17 18 class GrBufferObj { 19 public: 20 GrBufferObj(GrGLuint id) : fID(id), fDataPtr(NULL), fSize(0), fMapped(false) { 21 } 22 ~GrBufferObj() { SkDELETE_ARRAY(fDataPtr); } 23 24 void allocate(GrGLsizeiptr size, const GrGLchar* dataPtr) { 25 if (NULL != fDataPtr) { 26 GrAssert(0 != fSize); 27 SkDELETE_ARRAY(fDataPtr); 28 } 29 30 fSize = size; 31 fDataPtr = SkNEW_ARRAY(char, size); 32 } 33 34 GrGLuint id() const { return fID; } 35 GrGLchar* dataPtr() { return fDataPtr; } 36 GrGLsizeiptr size() const { return fSize; } 37 38 void setMapped(bool mapped) { fMapped = mapped; } 39 bool mapped() const { return fMapped; } 40 41 private: 42 GrGLuint fID; 43 GrGLchar* fDataPtr; 44 GrGLsizeiptr fSize; // size in bytes 45 bool fMapped; 46 }; 47 48 // In debug builds we do asserts that ensure we agree with GL about when a buffer 49 // is mapped. 50 static SkTDArray<GrBufferObj*> gBuffers; // slot 0 is reserved for head of free list 51 static GrGLuint gCurrArrayBuffer; 52 static GrGLuint gCurrElementArrayBuffer; 53 54 static GrBufferObj* look_up(GrGLuint id) { 55 GrBufferObj* buffer = gBuffers[id]; 56 GrAssert(NULL != buffer && buffer->id() == id); 57 return buffer; 58 } 59 60 static GrBufferObj* create_buffer() { 61 if (0 == gBuffers.count()) { 62 // slot zero is reserved for the head of the free list 63 *gBuffers.append() = NULL; 64 } 65 66 GrGLuint id; 67 GrBufferObj* buffer; 68 69 if (NULL == gBuffers[0]) { 70 // no free slots - create a new one 71 id = gBuffers.count(); 72 buffer = SkNEW_ARGS(GrBufferObj, (id)); 73 gBuffers.append(1, &buffer); 74 } else { 75 // recycle a slot from the free list 76 id = SkTCast<GrGLuint>(gBuffers[0]); 77 gBuffers[0] = gBuffers[id]; 78 79 buffer = SkNEW_ARGS(GrBufferObj, (id)); 80 gBuffers[id] = buffer; 81 } 82 83 return buffer; 84 } 85 86 static void delete_buffer(GrBufferObj* buffer) { 87 GrAssert(gBuffers.count() > 0); 88 89 GrGLuint id = buffer->id(); 90 SkDELETE(buffer); 91 92 // Add this slot to the free list 93 gBuffers[id] = gBuffers[0]; 94 gBuffers[0] = SkTCast<GrBufferObj*>((const void*)(intptr_t)id); 95 } 96 97 GrGLvoid GR_GL_FUNCTION_TYPE nullGLActiveTexture(GrGLenum texture) {} 98 GrGLvoid GR_GL_FUNCTION_TYPE nullGLAttachShader(GrGLuint program, GrGLuint shader) {} 99 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBeginQuery(GrGLenum target, GrGLuint id) {} 100 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindAttribLocation(GrGLuint program, GrGLuint index, const char* name) {} 101 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindTexture(GrGLenum target, GrGLuint texture) {} 102 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindVertexArray(GrGLuint id) {} 103 104 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGenBuffers(GrGLsizei n, GrGLuint* ids) { 105 106 for (int i = 0; i < n; ++i) { 107 GrBufferObj* buffer = create_buffer(); 108 ids[i] = buffer->id(); 109 } 110 } 111 112 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGenerateMipmap(GrGLenum target) {} 113 114 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferData(GrGLenum target, 115 GrGLsizeiptr size, 116 const GrGLvoid* data, 117 GrGLenum usage) { 118 GrGLuint id = 0; 119 120 switch (target) { 121 case GR_GL_ARRAY_BUFFER: 122 id = gCurrArrayBuffer; 123 break; 124 case GR_GL_ELEMENT_ARRAY_BUFFER: 125 id = gCurrElementArrayBuffer; 126 break; 127 default: 128 GrCrash("Unexpected target to nullGLBufferData"); 129 break; 130 } 131 132 if (id > 0) { 133 GrBufferObj* buffer = look_up(id); 134 buffer->allocate(size, (const GrGLchar*) data); 135 } 136 } 137 138 GrGLvoid GR_GL_FUNCTION_TYPE nullGLPixelStorei(GrGLenum pname, GrGLint param) {} 139 GrGLvoid GR_GL_FUNCTION_TYPE nullGLReadPixels(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels) {} 140 GrGLvoid GR_GL_FUNCTION_TYPE nullGLUseProgram(GrGLuint program) {} 141 GrGLvoid GR_GL_FUNCTION_TYPE nullGLViewport(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height) {} 142 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFramebuffer(GrGLenum target, GrGLuint framebuffer) {} 143 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindRenderbuffer(GrGLenum target, GrGLuint renderbuffer) {} 144 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteFramebuffers(GrGLsizei n, const GrGLuint *framebuffers) {} 145 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteRenderbuffers(GrGLsizei n, const GrGLuint *renderbuffers) {} 146 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferRenderbuffer(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer) {} 147 GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferTexture2D(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level) {} 148 149 GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateProgram() { 150 static GrGLuint gCurrID = 0; 151 return ++gCurrID; 152 } 153 154 GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateShader(GrGLenum type) { 155 static GrGLuint gCurrID = 0; 156 return ++gCurrID; 157 } 158 159 // same delete used for shaders and programs 160 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDelete(GrGLuint program) { 161 } 162 163 GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindBuffer(GrGLenum target, GrGLuint buffer) { 164 switch (target) { 165 case GR_GL_ARRAY_BUFFER: 166 gCurrArrayBuffer = buffer; 167 break; 168 case GR_GL_ELEMENT_ARRAY_BUFFER: 169 gCurrElementArrayBuffer = buffer; 170 break; 171 } 172 } 173 174 // deleting a bound buffer has the side effect of binding 0 175 GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteBuffers(GrGLsizei n, const GrGLuint* ids) { 176 for (int i = 0; i < n; ++i) { 177 if (ids[i] == gCurrArrayBuffer) { 178 gCurrArrayBuffer = 0; 179 } 180 if (ids[i] == gCurrElementArrayBuffer) { 181 gCurrElementArrayBuffer = 0; 182 } 183 184 GrBufferObj* buffer = look_up(ids[i]); 185 delete_buffer(buffer); 186 } 187 } 188 189 GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBuffer(GrGLenum target, GrGLenum access) { 190 191 GrGLuint id = 0; 192 switch (target) { 193 case GR_GL_ARRAY_BUFFER: 194 id = gCurrArrayBuffer; 195 break; 196 case GR_GL_ELEMENT_ARRAY_BUFFER: 197 id = gCurrElementArrayBuffer; 198 break; 199 } 200 201 if (id > 0) { 202 GrBufferObj* buffer = look_up(id); 203 GrAssert(!buffer->mapped()); 204 buffer->setMapped(true); 205 return buffer->dataPtr(); 206 } 207 208 GrAssert(false); 209 return NULL; // no buffer bound to target 210 } 211 212 GrGLboolean GR_GL_FUNCTION_TYPE nullGLUnmapBuffer(GrGLenum target) { 213 GrGLuint id = 0; 214 switch (target) { 215 case GR_GL_ARRAY_BUFFER: 216 id = gCurrArrayBuffer; 217 break; 218 case GR_GL_ELEMENT_ARRAY_BUFFER: 219 id = gCurrElementArrayBuffer; 220 break; 221 } 222 if (id > 0) { 223 GrBufferObj* buffer = look_up(id); 224 GrAssert(buffer->mapped()); 225 buffer->setMapped(false); 226 return GR_GL_TRUE; 227 } 228 229 GrAlwaysAssert(false); 230 return GR_GL_FALSE; // GR_GL_INVALID_OPERATION; 231 } 232 233 GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetBufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) { 234 switch (pname) { 235 case GR_GL_BUFFER_MAPPED: { 236 *params = GR_GL_FALSE; 237 GrGLuint id = 0; 238 switch (target) { 239 case GR_GL_ARRAY_BUFFER: 240 id = gCurrArrayBuffer; 241 break; 242 case GR_GL_ELEMENT_ARRAY_BUFFER: 243 id = gCurrElementArrayBuffer; 244 break; 245 } 246 if (id > 0) { 247 GrBufferObj* buffer = look_up(id); 248 if (buffer->mapped()) { 249 *params = GR_GL_TRUE; 250 } 251 } 252 break; } 253 default: 254 GrCrash("Unexpected pname to GetBufferParamateriv"); 255 break; 256 } 257 }; 258 259 } // end anonymous namespace 260 261 const GrGLInterface* GrGLCreateNullInterface() { 262 // The gl functions are not context-specific so we create one global 263 // interface 264 static SkAutoTUnref<GrGLInterface> glInterface; 265 if (!glInterface.get()) { 266 GrGLInterface* interface = SkNEW(GrGLInterface); 267 glInterface.reset(interface); 268 interface->fBindingsExported = kDesktop_GrGLBinding; 269 interface->fActiveTexture = nullGLActiveTexture; 270 interface->fAttachShader = nullGLAttachShader; 271 interface->fBeginQuery = nullGLBeginQuery; 272 interface->fBindAttribLocation = nullGLBindAttribLocation; 273 interface->fBindBuffer = nullGLBindBuffer; 274 interface->fBindFragDataLocation = noOpGLBindFragDataLocation; 275 interface->fBindTexture = nullGLBindTexture; 276 interface->fBindVertexArray = nullGLBindVertexArray; 277 interface->fBlendColor = noOpGLBlendColor; 278 interface->fBlendFunc = noOpGLBlendFunc; 279 interface->fBufferData = nullGLBufferData; 280 interface->fBufferSubData = noOpGLBufferSubData; 281 interface->fClear = noOpGLClear; 282 interface->fClearColor = noOpGLClearColor; 283 interface->fClearStencil = noOpGLClearStencil; 284 interface->fColorMask = noOpGLColorMask; 285 interface->fCompileShader = noOpGLCompileShader; 286 interface->fCompressedTexImage2D = noOpGLCompressedTexImage2D; 287 interface->fCopyTexSubImage2D = noOpGLCopyTexSubImage2D; 288 interface->fCreateProgram = nullGLCreateProgram; 289 interface->fCreateShader = nullGLCreateShader; 290 interface->fCullFace = noOpGLCullFace; 291 interface->fDeleteBuffers = nullGLDeleteBuffers; 292 interface->fDeleteProgram = nullGLDelete; 293 interface->fDeleteQueries = noOpGLDeleteIds; 294 interface->fDeleteShader = nullGLDelete; 295 interface->fDeleteTextures = noOpGLDeleteIds; 296 interface->fDeleteVertexArrays = noOpGLDeleteIds; 297 interface->fDepthMask = noOpGLDepthMask; 298 interface->fDisable = noOpGLDisable; 299 interface->fDisableVertexAttribArray = noOpGLDisableVertexAttribArray; 300 interface->fDrawArrays = noOpGLDrawArrays; 301 interface->fDrawBuffer = noOpGLDrawBuffer; 302 interface->fDrawBuffers = noOpGLDrawBuffers; 303 interface->fDrawElements = noOpGLDrawElements; 304 interface->fEnable = noOpGLEnable; 305 interface->fEnableVertexAttribArray = noOpGLEnableVertexAttribArray; 306 interface->fEndQuery = noOpGLEndQuery; 307 interface->fFinish = noOpGLFinish; 308 interface->fFlush = noOpGLFlush; 309 interface->fFrontFace = noOpGLFrontFace; 310 interface->fGenBuffers = nullGLGenBuffers; 311 interface->fGenerateMipmap = nullGLGenerateMipmap; 312 interface->fGenQueries = noOpGLGenIds; 313 interface->fGenTextures = noOpGLGenIds; 314 interface->fGenVertexArrays = noOpGLGenIds; 315 interface->fGetBufferParameteriv = nullGLGetBufferParameteriv; 316 interface->fGetError = noOpGLGetError; 317 interface->fGetIntegerv = noOpGLGetIntegerv; 318 interface->fGetQueryObjecti64v = noOpGLGetQueryObjecti64v; 319 interface->fGetQueryObjectiv = noOpGLGetQueryObjectiv; 320 interface->fGetQueryObjectui64v = noOpGLGetQueryObjectui64v; 321 interface->fGetQueryObjectuiv = noOpGLGetQueryObjectuiv; 322 interface->fGetQueryiv = noOpGLGetQueryiv; 323 interface->fGetProgramInfoLog = noOpGLGetInfoLog; 324 interface->fGetProgramiv = noOpGLGetShaderOrProgramiv; 325 interface->fGetShaderInfoLog = noOpGLGetInfoLog; 326 interface->fGetShaderiv = noOpGLGetShaderOrProgramiv; 327 interface->fGetString = noOpGLGetString; 328 interface->fGetStringi = noOpGLGetStringi; 329 interface->fGetTexLevelParameteriv = noOpGLGetTexLevelParameteriv; 330 interface->fGetUniformLocation = noOpGLGetUniformLocation; 331 interface->fLineWidth = noOpGLLineWidth; 332 interface->fLinkProgram = noOpGLLinkProgram; 333 interface->fPixelStorei = nullGLPixelStorei; 334 interface->fQueryCounter = noOpGLQueryCounter; 335 interface->fReadBuffer = noOpGLReadBuffer; 336 interface->fReadPixels = nullGLReadPixels; 337 interface->fScissor = noOpGLScissor; 338 interface->fShaderSource = noOpGLShaderSource; 339 interface->fStencilFunc = noOpGLStencilFunc; 340 interface->fStencilFuncSeparate = noOpGLStencilFuncSeparate; 341 interface->fStencilMask = noOpGLStencilMask; 342 interface->fStencilMaskSeparate = noOpGLStencilMaskSeparate; 343 interface->fStencilOp = noOpGLStencilOp; 344 interface->fStencilOpSeparate = noOpGLStencilOpSeparate; 345 interface->fTexImage2D = noOpGLTexImage2D; 346 interface->fTexParameteri = noOpGLTexParameteri; 347 interface->fTexParameteriv = noOpGLTexParameteriv; 348 interface->fTexSubImage2D = noOpGLTexSubImage2D; 349 interface->fTexStorage2D = noOpGLTexStorage2D; 350 interface->fDiscardFramebuffer = noOpGLDiscardFramebuffer; 351 interface->fUniform1f = noOpGLUniform1f; 352 interface->fUniform1i = noOpGLUniform1i; 353 interface->fUniform1fv = noOpGLUniform1fv; 354 interface->fUniform1iv = noOpGLUniform1iv; 355 interface->fUniform2f = noOpGLUniform2f; 356 interface->fUniform2i = noOpGLUniform2i; 357 interface->fUniform2fv = noOpGLUniform2fv; 358 interface->fUniform2iv = noOpGLUniform2iv; 359 interface->fUniform3f = noOpGLUniform3f; 360 interface->fUniform3i = noOpGLUniform3i; 361 interface->fUniform3fv = noOpGLUniform3fv; 362 interface->fUniform3iv = noOpGLUniform3iv; 363 interface->fUniform4f = noOpGLUniform4f; 364 interface->fUniform4i = noOpGLUniform4i; 365 interface->fUniform4fv = noOpGLUniform4fv; 366 interface->fUniform4iv = noOpGLUniform4iv; 367 interface->fUniformMatrix2fv = noOpGLUniformMatrix2fv; 368 interface->fUniformMatrix3fv = noOpGLUniformMatrix3fv; 369 interface->fUniformMatrix4fv = noOpGLUniformMatrix4fv; 370 interface->fUseProgram = nullGLUseProgram; 371 interface->fVertexAttrib4fv = noOpGLVertexAttrib4fv; 372 interface->fVertexAttribPointer = noOpGLVertexAttribPointer; 373 interface->fViewport = nullGLViewport; 374 interface->fBindFramebuffer = nullGLBindFramebuffer; 375 interface->fBindRenderbuffer = nullGLBindRenderbuffer; 376 interface->fCheckFramebufferStatus = noOpGLCheckFramebufferStatus; 377 interface->fDeleteFramebuffers = nullGLDeleteFramebuffers; 378 interface->fDeleteRenderbuffers = nullGLDeleteRenderbuffers; 379 interface->fFramebufferRenderbuffer = nullGLFramebufferRenderbuffer; 380 interface->fFramebufferTexture2D = nullGLFramebufferTexture2D; 381 interface->fGenFramebuffers = noOpGLGenIds; 382 interface->fGenRenderbuffers = noOpGLGenIds; 383 interface->fGetFramebufferAttachmentParameteriv = noOpGLGetFramebufferAttachmentParameteriv; 384 interface->fGetRenderbufferParameteriv = noOpGLGetRenderbufferParameteriv; 385 interface->fRenderbufferStorage = noOpGLRenderbufferStorage; 386 interface->fRenderbufferStorageMultisample = noOpGLRenderbufferStorageMultisample; 387 interface->fBlitFramebuffer = noOpGLBlitFramebuffer; 388 interface->fResolveMultisampleFramebuffer = noOpGLResolveMultisampleFramebuffer; 389 interface->fMapBuffer = nullGLMapBuffer; 390 interface->fUnmapBuffer = nullGLUnmapBuffer; 391 interface->fBindFragDataLocationIndexed = noOpGLBindFragDataLocationIndexed; 392 } 393 glInterface.get()->ref(); 394 return glInterface.get(); 395 } 396
