1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/gl/GrGLInterface.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,488 @@
1.4 +/*
1.5 + * Copyright 2011 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +
1.12 +#include "gl/GrGLInterface.h"
1.13 +#include "gl/GrGLExtensions.h"
1.14 +#include "gl/GrGLUtil.h"
1.15 +
1.16 +#include <stdio.h>
1.17 +
1.18 +#if GR_GL_PER_GL_FUNC_CALLBACK
1.19 +namespace {
1.20 +void GrGLDefaultInterfaceCallback(const GrGLInterface*) {}
1.21 +}
1.22 +#endif
1.23 +
1.24 +const GrGLInterface* GrGLInterfaceAddTestDebugMarker(const GrGLInterface* interface,
1.25 + GrGLInsertEventMarkerProc insertEventMarkerFn,
1.26 + GrGLPushGroupMarkerProc pushGroupMarkerFn,
1.27 + GrGLPopGroupMarkerProc popGroupMarkerFn) {
1.28 + GrGLInterface* newInterface = GrGLInterface::NewClone(interface);
1.29 +
1.30 + if (!newInterface->fExtensions.has("GL_EXT_debug_marker")) {
1.31 + newInterface->fExtensions.add("GL_EXT_debug_marker");
1.32 + }
1.33 +
1.34 + newInterface->fFunctions.fInsertEventMarker = insertEventMarkerFn;
1.35 + newInterface->fFunctions.fPushGroupMarker = pushGroupMarkerFn;
1.36 + newInterface->fFunctions.fPopGroupMarker = popGroupMarkerFn;
1.37 +
1.38 + return newInterface;
1.39 +}
1.40 +
1.41 +const GrGLInterface* GrGLInterfaceRemoveNVPR(const GrGLInterface* interface) {
1.42 + GrGLInterface* newInterface = GrGLInterface::NewClone(interface);
1.43 +
1.44 + newInterface->fExtensions.remove("GL_NV_path_rendering");
1.45 +
1.46 + newInterface->fFunctions.fPathCommands = NULL;
1.47 + newInterface->fFunctions.fPathCoords = NULL;
1.48 + newInterface->fFunctions.fPathSubCommands = NULL;
1.49 + newInterface->fFunctions.fPathSubCoords = NULL;
1.50 + newInterface->fFunctions.fPathString = NULL;
1.51 + newInterface->fFunctions.fPathGlyphs = NULL;
1.52 + newInterface->fFunctions.fPathGlyphRange = NULL;
1.53 + newInterface->fFunctions.fWeightPaths = NULL;
1.54 + newInterface->fFunctions.fCopyPath = NULL;
1.55 + newInterface->fFunctions.fInterpolatePaths = NULL;
1.56 + newInterface->fFunctions.fTransformPath = NULL;
1.57 + newInterface->fFunctions.fPathParameteriv = NULL;
1.58 + newInterface->fFunctions.fPathParameteri = NULL;
1.59 + newInterface->fFunctions.fPathParameterfv = NULL;
1.60 + newInterface->fFunctions.fPathParameterf = NULL;
1.61 + newInterface->fFunctions.fPathDashArray = NULL;
1.62 + newInterface->fFunctions.fGenPaths = NULL;
1.63 + newInterface->fFunctions.fDeletePaths = NULL;
1.64 + newInterface->fFunctions.fIsPath = NULL;
1.65 + newInterface->fFunctions.fPathStencilFunc = NULL;
1.66 + newInterface->fFunctions.fPathStencilDepthOffset = NULL;
1.67 + newInterface->fFunctions.fStencilFillPath = NULL;
1.68 + newInterface->fFunctions.fStencilStrokePath = NULL;
1.69 + newInterface->fFunctions.fStencilFillPathInstanced = NULL;
1.70 + newInterface->fFunctions.fStencilStrokePathInstanced = NULL;
1.71 + newInterface->fFunctions.fPathCoverDepthFunc = NULL;
1.72 + newInterface->fFunctions.fPathColorGen = NULL;
1.73 + newInterface->fFunctions.fPathTexGen = NULL;
1.74 + newInterface->fFunctions.fPathFogGen = NULL;
1.75 + newInterface->fFunctions.fCoverFillPath = NULL;
1.76 + newInterface->fFunctions.fCoverStrokePath = NULL;
1.77 + newInterface->fFunctions.fCoverFillPathInstanced = NULL;
1.78 + newInterface->fFunctions.fCoverStrokePathInstanced = NULL;
1.79 + newInterface->fFunctions.fGetPathParameteriv = NULL;
1.80 + newInterface->fFunctions.fGetPathParameterfv = NULL;
1.81 + newInterface->fFunctions.fGetPathCommands = NULL;
1.82 + newInterface->fFunctions.fGetPathCoords = NULL;
1.83 + newInterface->fFunctions.fGetPathDashArray = NULL;
1.84 + newInterface->fFunctions.fGetPathMetrics = NULL;
1.85 + newInterface->fFunctions.fGetPathMetricRange = NULL;
1.86 + newInterface->fFunctions.fGetPathSpacing = NULL;
1.87 + newInterface->fFunctions.fGetPathColorGeniv = NULL;
1.88 + newInterface->fFunctions.fGetPathColorGenfv = NULL;
1.89 + newInterface->fFunctions.fGetPathTexGeniv = NULL;
1.90 + newInterface->fFunctions.fGetPathTexGenfv = NULL;
1.91 + newInterface->fFunctions.fIsPointInFillPath = NULL;
1.92 + newInterface->fFunctions.fIsPointInStrokePath = NULL;
1.93 + newInterface->fFunctions.fGetPathLength = NULL;
1.94 + newInterface->fFunctions.fPointAlongPath = NULL;
1.95 +
1.96 + return newInterface;
1.97 +}
1.98 +
1.99 +GrGLInterface::GrGLInterface() {
1.100 + fStandard = kNone_GrGLStandard;
1.101 +
1.102 +#if GR_GL_PER_GL_FUNC_CALLBACK
1.103 + fCallback = GrGLDefaultInterfaceCallback;
1.104 + fCallbackData = 0;
1.105 +#endif
1.106 +}
1.107 +
1.108 +GrGLInterface* GrGLInterface::NewClone(const GrGLInterface* interface) {
1.109 + SkASSERT(NULL != interface);
1.110 +
1.111 + GrGLInterface* clone = SkNEW(GrGLInterface);
1.112 + clone->fStandard = interface->fStandard;
1.113 + clone->fExtensions = interface->fExtensions;
1.114 + clone->fFunctions = interface->fFunctions;
1.115 +#if GR_GL_PER_GL_FUNC_CALLBACK
1.116 + clone->fCallback = interface->fCallback;
1.117 + clone->fCallbackData = interface->fCallbackData;
1.118 +#endif
1.119 + return clone;
1.120 +}
1.121 +
1.122 +bool GrGLInterface::validate() const {
1.123 +
1.124 + if (kNone_GrGLStandard == fStandard) {
1.125 + return false;
1.126 + }
1.127 +
1.128 + if (!fExtensions.isInitialized()) {
1.129 + return false;
1.130 + }
1.131 +
1.132 + // functions that are always required
1.133 + if (NULL == fFunctions.fActiveTexture ||
1.134 + NULL == fFunctions.fAttachShader ||
1.135 + NULL == fFunctions.fBindAttribLocation ||
1.136 + NULL == fFunctions.fBindBuffer ||
1.137 + NULL == fFunctions.fBindTexture ||
1.138 + NULL == fFunctions.fBlendFunc ||
1.139 + NULL == fFunctions.fBlendColor || // -> GL >= 1.4, ES >= 2.0 or extension
1.140 + NULL == fFunctions.fBufferData ||
1.141 + NULL == fFunctions.fBufferSubData ||
1.142 + NULL == fFunctions.fClear ||
1.143 + NULL == fFunctions.fClearColor ||
1.144 + NULL == fFunctions.fClearStencil ||
1.145 + NULL == fFunctions.fColorMask ||
1.146 + NULL == fFunctions.fCompileShader ||
1.147 + NULL == fFunctions.fCopyTexSubImage2D ||
1.148 + NULL == fFunctions.fCreateProgram ||
1.149 + NULL == fFunctions.fCreateShader ||
1.150 + NULL == fFunctions.fCullFace ||
1.151 + NULL == fFunctions.fDeleteBuffers ||
1.152 + NULL == fFunctions.fDeleteProgram ||
1.153 + NULL == fFunctions.fDeleteShader ||
1.154 + NULL == fFunctions.fDeleteTextures ||
1.155 + NULL == fFunctions.fDepthMask ||
1.156 + NULL == fFunctions.fDisable ||
1.157 + NULL == fFunctions.fDisableVertexAttribArray ||
1.158 + NULL == fFunctions.fDrawArrays ||
1.159 + NULL == fFunctions.fDrawElements ||
1.160 + NULL == fFunctions.fEnable ||
1.161 + NULL == fFunctions.fEnableVertexAttribArray ||
1.162 + NULL == fFunctions.fFrontFace ||
1.163 + NULL == fFunctions.fGenBuffers ||
1.164 + NULL == fFunctions.fGenTextures ||
1.165 + NULL == fFunctions.fGetBufferParameteriv ||
1.166 + NULL == fFunctions.fGenerateMipmap ||
1.167 + NULL == fFunctions.fGetError ||
1.168 + NULL == fFunctions.fGetIntegerv ||
1.169 + NULL == fFunctions.fGetProgramInfoLog ||
1.170 + NULL == fFunctions.fGetProgramiv ||
1.171 + NULL == fFunctions.fGetShaderInfoLog ||
1.172 + NULL == fFunctions.fGetShaderiv ||
1.173 + NULL == fFunctions.fGetString ||
1.174 + NULL == fFunctions.fGetUniformLocation ||
1.175 + NULL == fFunctions.fLinkProgram ||
1.176 + NULL == fFunctions.fLineWidth ||
1.177 + NULL == fFunctions.fPixelStorei ||
1.178 + NULL == fFunctions.fReadPixels ||
1.179 + NULL == fFunctions.fScissor ||
1.180 + NULL == fFunctions.fShaderSource ||
1.181 + NULL == fFunctions.fStencilFunc ||
1.182 + NULL == fFunctions.fStencilMask ||
1.183 + NULL == fFunctions.fStencilOp ||
1.184 + NULL == fFunctions.fTexImage2D ||
1.185 + NULL == fFunctions.fTexParameteri ||
1.186 + NULL == fFunctions.fTexParameteriv ||
1.187 + NULL == fFunctions.fTexSubImage2D ||
1.188 + NULL == fFunctions.fUniform1f ||
1.189 + NULL == fFunctions.fUniform1i ||
1.190 + NULL == fFunctions.fUniform1fv ||
1.191 + NULL == fFunctions.fUniform1iv ||
1.192 + NULL == fFunctions.fUniform2f ||
1.193 + NULL == fFunctions.fUniform2i ||
1.194 + NULL == fFunctions.fUniform2fv ||
1.195 + NULL == fFunctions.fUniform2iv ||
1.196 + NULL == fFunctions.fUniform3f ||
1.197 + NULL == fFunctions.fUniform3i ||
1.198 + NULL == fFunctions.fUniform3fv ||
1.199 + NULL == fFunctions.fUniform3iv ||
1.200 + NULL == fFunctions.fUniform4f ||
1.201 + NULL == fFunctions.fUniform4i ||
1.202 + NULL == fFunctions.fUniform4fv ||
1.203 + NULL == fFunctions.fUniform4iv ||
1.204 + NULL == fFunctions.fUniformMatrix2fv ||
1.205 + NULL == fFunctions.fUniformMatrix3fv ||
1.206 + NULL == fFunctions.fUniformMatrix4fv ||
1.207 + NULL == fFunctions.fUseProgram ||
1.208 + NULL == fFunctions.fVertexAttrib4fv ||
1.209 + NULL == fFunctions.fVertexAttribPointer ||
1.210 + NULL == fFunctions.fViewport ||
1.211 + NULL == fFunctions.fBindFramebuffer ||
1.212 + NULL == fFunctions.fBindRenderbuffer ||
1.213 + NULL == fFunctions.fCheckFramebufferStatus ||
1.214 + NULL == fFunctions.fDeleteFramebuffers ||
1.215 + NULL == fFunctions.fDeleteRenderbuffers ||
1.216 + NULL == fFunctions.fFinish ||
1.217 + NULL == fFunctions.fFlush ||
1.218 + NULL == fFunctions.fFramebufferRenderbuffer ||
1.219 + NULL == fFunctions.fFramebufferTexture2D ||
1.220 + NULL == fFunctions.fGetFramebufferAttachmentParameteriv ||
1.221 + NULL == fFunctions.fGetRenderbufferParameteriv ||
1.222 + NULL == fFunctions.fGenFramebuffers ||
1.223 + NULL == fFunctions.fGenRenderbuffers ||
1.224 + NULL == fFunctions.fRenderbufferStorage) {
1.225 + return false;
1.226 + }
1.227 +
1.228 + GrGLVersion glVer = GrGLGetVersion(this);
1.229 +
1.230 + bool isCoreProfile = false;
1.231 + if (kGL_GrGLStandard == fStandard && glVer >= GR_GL_VER(3,2)) {
1.232 + GrGLint profileMask;
1.233 + GR_GL_GetIntegerv(this, GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
1.234 + isCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
1.235 + }
1.236 +
1.237 + // Now check that baseline ES/Desktop fns not covered above are present
1.238 + // and that we have fn pointers for any advertised fExtensions that we will
1.239 + // try to use.
1.240 +
1.241 + // these functions are part of ES2, we assume they are available
1.242 + // On the desktop we assume they are available if the extension
1.243 + // is present or GL version is high enough.
1.244 + if (kGLES_GrGLStandard == fStandard) {
1.245 + if (NULL == fFunctions.fStencilFuncSeparate ||
1.246 + NULL == fFunctions.fStencilMaskSeparate ||
1.247 + NULL == fFunctions.fStencilOpSeparate) {
1.248 + return false;
1.249 + }
1.250 + } else if (kGL_GrGLStandard == fStandard) {
1.251 +
1.252 + if (glVer >= GR_GL_VER(2,0)) {
1.253 + if (NULL == fFunctions.fStencilFuncSeparate ||
1.254 + NULL == fFunctions.fStencilMaskSeparate ||
1.255 + NULL == fFunctions.fStencilOpSeparate) {
1.256 + return false;
1.257 + }
1.258 + }
1.259 + if (glVer >= GR_GL_VER(3,0) && NULL == fFunctions.fBindFragDataLocation) {
1.260 + return false;
1.261 + }
1.262 + if (glVer >= GR_GL_VER(2,0) || fExtensions.has("GL_ARB_draw_buffers")) {
1.263 + if (NULL == fFunctions.fDrawBuffers) {
1.264 + return false;
1.265 + }
1.266 + }
1.267 +
1.268 + if (glVer >= GR_GL_VER(1,5) || fExtensions.has("GL_ARB_occlusion_query")) {
1.269 + if (NULL == fFunctions.fGenQueries ||
1.270 + NULL == fFunctions.fDeleteQueries ||
1.271 + NULL == fFunctions.fBeginQuery ||
1.272 + NULL == fFunctions.fEndQuery ||
1.273 + NULL == fFunctions.fGetQueryiv ||
1.274 + NULL == fFunctions.fGetQueryObjectiv ||
1.275 + NULL == fFunctions.fGetQueryObjectuiv) {
1.276 + return false;
1.277 + }
1.278 + }
1.279 + if (glVer >= GR_GL_VER(3,3) ||
1.280 + fExtensions.has("GL_ARB_timer_query") ||
1.281 + fExtensions.has("GL_EXT_timer_query")) {
1.282 + if (NULL == fFunctions.fGetQueryObjecti64v ||
1.283 + NULL == fFunctions.fGetQueryObjectui64v) {
1.284 + return false;
1.285 + }
1.286 + }
1.287 + if (glVer >= GR_GL_VER(3,3) || fExtensions.has("GL_ARB_timer_query")) {
1.288 + if (NULL == fFunctions.fQueryCounter) {
1.289 + return false;
1.290 + }
1.291 + }
1.292 + if (!isCoreProfile) {
1.293 + if (NULL == fFunctions.fLoadIdentity ||
1.294 + NULL == fFunctions.fLoadMatrixf ||
1.295 + NULL == fFunctions.fMatrixMode ||
1.296 + NULL == fFunctions.fTexGenfv ||
1.297 + NULL == fFunctions.fTexGeni) {
1.298 + return false;
1.299 + }
1.300 + }
1.301 + if (fExtensions.has("GL_NV_path_rendering")) {
1.302 + if (NULL == fFunctions.fPathCommands ||
1.303 + NULL == fFunctions.fPathCoords ||
1.304 + NULL == fFunctions.fPathSubCommands ||
1.305 + NULL == fFunctions.fPathSubCoords ||
1.306 + NULL == fFunctions.fPathString ||
1.307 + NULL == fFunctions.fPathGlyphs ||
1.308 + NULL == fFunctions.fPathGlyphRange ||
1.309 + NULL == fFunctions.fWeightPaths ||
1.310 + NULL == fFunctions.fCopyPath ||
1.311 + NULL == fFunctions.fInterpolatePaths ||
1.312 + NULL == fFunctions.fTransformPath ||
1.313 + NULL == fFunctions.fPathParameteriv ||
1.314 + NULL == fFunctions.fPathParameteri ||
1.315 + NULL == fFunctions.fPathParameterfv ||
1.316 + NULL == fFunctions.fPathParameterf ||
1.317 + NULL == fFunctions.fPathDashArray ||
1.318 + NULL == fFunctions.fGenPaths ||
1.319 + NULL == fFunctions.fDeletePaths ||
1.320 + NULL == fFunctions.fIsPath ||
1.321 + NULL == fFunctions.fPathStencilFunc ||
1.322 + NULL == fFunctions.fPathStencilDepthOffset ||
1.323 + NULL == fFunctions.fStencilFillPath ||
1.324 + NULL == fFunctions.fStencilStrokePath ||
1.325 + NULL == fFunctions.fStencilFillPathInstanced ||
1.326 + NULL == fFunctions.fStencilStrokePathInstanced ||
1.327 + NULL == fFunctions.fPathCoverDepthFunc ||
1.328 + NULL == fFunctions.fPathColorGen ||
1.329 + NULL == fFunctions.fPathTexGen ||
1.330 + NULL == fFunctions.fPathFogGen ||
1.331 + NULL == fFunctions.fCoverFillPath ||
1.332 + NULL == fFunctions.fCoverStrokePath ||
1.333 + NULL == fFunctions.fCoverFillPathInstanced ||
1.334 + NULL == fFunctions.fCoverStrokePathInstanced ||
1.335 + NULL == fFunctions.fGetPathParameteriv ||
1.336 + NULL == fFunctions.fGetPathParameterfv ||
1.337 + NULL == fFunctions.fGetPathCommands ||
1.338 + NULL == fFunctions.fGetPathCoords ||
1.339 + NULL == fFunctions.fGetPathDashArray ||
1.340 + NULL == fFunctions.fGetPathMetrics ||
1.341 + NULL == fFunctions.fGetPathMetricRange ||
1.342 + NULL == fFunctions.fGetPathSpacing ||
1.343 + NULL == fFunctions.fGetPathColorGeniv ||
1.344 + NULL == fFunctions.fGetPathColorGenfv ||
1.345 + NULL == fFunctions.fGetPathTexGeniv ||
1.346 + NULL == fFunctions.fGetPathTexGenfv ||
1.347 + NULL == fFunctions.fIsPointInFillPath ||
1.348 + NULL == fFunctions.fIsPointInStrokePath ||
1.349 + NULL == fFunctions.fGetPathLength ||
1.350 + NULL == fFunctions.fPointAlongPath) {
1.351 + return false;
1.352 + }
1.353 + }
1.354 + }
1.355 +
1.356 + // optional function on desktop before 1.3
1.357 + if (kGL_GrGLStandard != fStandard ||
1.358 + (glVer >= GR_GL_VER(1,3)) ||
1.359 + fExtensions.has("GL_ARB_texture_compression")) {
1.360 + if (NULL == fFunctions.fCompressedTexImage2D) {
1.361 + return false;
1.362 + }
1.363 + }
1.364 +
1.365 + // part of desktop GL, but not ES
1.366 + if (kGL_GrGLStandard == fStandard &&
1.367 + (NULL == fFunctions.fGetTexLevelParameteriv ||
1.368 + NULL == fFunctions.fDrawBuffer ||
1.369 + NULL == fFunctions.fReadBuffer)) {
1.370 + return false;
1.371 + }
1.372 +
1.373 + // GL_EXT_texture_storage is part of desktop 4.2
1.374 + // There is a desktop ARB extension and an ES+desktop EXT extension
1.375 + if (kGL_GrGLStandard == fStandard) {
1.376 + if (glVer >= GR_GL_VER(4,2) ||
1.377 + fExtensions.has("GL_ARB_texture_storage") ||
1.378 + fExtensions.has("GL_EXT_texture_storage")) {
1.379 + if (NULL == fFunctions.fTexStorage2D) {
1.380 + return false;
1.381 + }
1.382 + }
1.383 + } else if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_EXT_texture_storage")) {
1.384 + if (NULL == fFunctions.fTexStorage2D) {
1.385 + return false;
1.386 + }
1.387 + }
1.388 +
1.389 + if (fExtensions.has("GL_EXT_discard_framebuffer")) {
1.390 +// FIXME: Remove this once Chromium is updated to provide this function
1.391 +#if 0
1.392 + if (NULL == fFunctions.fDiscardFramebuffer) {
1.393 + return false;
1.394 + }
1.395 +#endif
1.396 + }
1.397 +
1.398 + // FBO MSAA
1.399 + if (kGL_GrGLStandard == fStandard) {
1.400 + // GL 3.0 and the ARB extension have multisample + blit
1.401 + if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_ARB_framebuffer_object")) {
1.402 + if (NULL == fFunctions.fRenderbufferStorageMultisample ||
1.403 + NULL == fFunctions.fBlitFramebuffer) {
1.404 + return false;
1.405 + }
1.406 + } else {
1.407 + if (fExtensions.has("GL_EXT_framebuffer_blit") &&
1.408 + NULL == fFunctions.fBlitFramebuffer) {
1.409 + return false;
1.410 + }
1.411 + if (fExtensions.has("GL_EXT_framebuffer_multisample") &&
1.412 + NULL == fFunctions.fRenderbufferStorageMultisample) {
1.413 + return false;
1.414 + }
1.415 + }
1.416 + } else {
1.417 + if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_CHROMIUM_framebuffer_multisample")) {
1.418 + if (NULL == fFunctions.fRenderbufferStorageMultisample ||
1.419 + NULL == fFunctions.fBlitFramebuffer) {
1.420 + return false;
1.421 + }
1.422 + }
1.423 + if (fExtensions.has("GL_APPLE_framebuffer_multisample")) {
1.424 + if (NULL == fFunctions.fRenderbufferStorageMultisampleES2APPLE ||
1.425 + NULL == fFunctions.fResolveMultisampleFramebuffer) {
1.426 + return false;
1.427 + }
1.428 + }
1.429 + if (fExtensions.has("GL_IMG_multisampled_render_to_texture") ||
1.430 + fExtensions.has("GL_EXT_multisampled_render_to_texture")) {
1.431 + if (NULL == fFunctions.fRenderbufferStorageMultisampleES2EXT ||
1.432 + NULL == fFunctions.fFramebufferTexture2DMultisample) {
1.433 + return false;
1.434 + }
1.435 + }
1.436 + }
1.437 +
1.438 + // On ES buffer mapping is an extension. On Desktop
1.439 + // buffer mapping was part of original VBO extension
1.440 + // which we require.
1.441 + if (kGL_GrGLStandard == fStandard || fExtensions.has("GL_OES_mapbuffer")) {
1.442 + if (NULL == fFunctions.fMapBuffer ||
1.443 + NULL == fFunctions.fUnmapBuffer) {
1.444 + return false;
1.445 + }
1.446 + }
1.447 +
1.448 + // Dual source blending
1.449 + if (kGL_GrGLStandard == fStandard &&
1.450 + (glVer >= GR_GL_VER(3,3) || fExtensions.has("GL_ARB_blend_func_extended"))) {
1.451 + if (NULL == fFunctions.fBindFragDataLocationIndexed) {
1.452 + return false;
1.453 + }
1.454 + }
1.455 +
1.456 + // glGetStringi was added in version 3.0 of both desktop and ES.
1.457 + if (glVer >= GR_GL_VER(3, 0)) {
1.458 + if (NULL == fFunctions.fGetStringi) {
1.459 + return false;
1.460 + }
1.461 + }
1.462 +
1.463 + if (kGL_GrGLStandard == fStandard) {
1.464 + if (glVer >= GR_GL_VER(3, 0) || fExtensions.has("GL_ARB_vertex_array_object")) {
1.465 + if (NULL == fFunctions.fBindVertexArray ||
1.466 + NULL == fFunctions.fDeleteVertexArrays ||
1.467 + NULL == fFunctions.fGenVertexArrays) {
1.468 + return false;
1.469 + }
1.470 + }
1.471 + } else {
1.472 + if (glVer >= GR_GL_VER(3,0) || fExtensions.has("GL_OES_vertex_array_object")) {
1.473 + if (NULL == fFunctions.fBindVertexArray ||
1.474 + NULL == fFunctions.fDeleteVertexArrays ||
1.475 + NULL == fFunctions.fGenVertexArrays) {
1.476 + return false;
1.477 + }
1.478 + }
1.479 + }
1.480 +
1.481 +#if 0
1.482 + if (fExtensions.has("GL_EXT_debug_marker")) {
1.483 + if (NULL == fFunctions.fInsertEventMarker ||
1.484 + NULL == fFunctions.fPushGroupMarker ||
1.485 + NULL == fFunctions.fPopGroupMarker) {
1.486 + return false;
1.487 + }
1.488 + }
1.489 +#endif
1.490 + return true;
1.491 +}
