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 "GrGpuGL.h"
10 #include "GrGLStencilBuffer.h"
11 #include "GrOptDrawState.h"
12 #include "GrTemplates.h"
13 #include "GrTypes.h"
14 #include "SkStrokeRec.h"
15 #include "SkTemplates.h"
16
17 #define GL_CALL(X) GR_GL_CALL(this->glInterface(), X)
18 #define GL_CALL_RET(RET, X) GR_GL_CALL_RET(this->glInterface(), RET, X)
19
20 #define SKIP_CACHE_CHECK true
21
22 #if GR_GL_CHECK_ALLOC_WITH_GET_ERROR
23 #define CLEAR_ERROR_BEFORE_ALLOC(iface) GrGLClearErr(iface)
24 #define GL_ALLOC_CALL(iface, call) GR_GL_CALL_NOERRCHECK(iface, call)
25 #define CHECK_ALLOC_ERROR(iface) GR_GL_GET_ERROR(iface)
26 #else
27 #define CLEAR_ERROR_BEFORE_ALLOC(iface)
28 #define GL_ALLOC_CALL(iface, call) GR_GL_CALL(iface, call)
29 #define CHECK_ALLOC_ERROR(iface) GR_GL_NO_ERROR
30 #endif
31
32
33 ///////////////////////////////////////////////////////////////////////////////
34
35
36 static const GrGLenum gXfermodeCoeff2Blend[] = {
37 GR_GL_ZERO,
38 GR_GL_ONE,
39 GR_GL_SRC_COLOR,
40 GR_GL_ONE_MINUS_SRC_COLOR,
41 GR_GL_DST_COLOR,
42 GR_GL_ONE_MINUS_DST_COLOR,
43 GR_GL_SRC_ALPHA,
44 GR_GL_ONE_MINUS_SRC_ALPHA,
45 GR_GL_DST_ALPHA,
46 GR_GL_ONE_MINUS_DST_ALPHA,
47 GR_GL_CONSTANT_COLOR,
48 GR_GL_ONE_MINUS_CONSTANT_COLOR,
49 GR_GL_CONSTANT_ALPHA,
50 GR_GL_ONE_MINUS_CONSTANT_ALPHA,
51
52 // extended blend coeffs
53 GR_GL_SRC1_COLOR,
54 GR_GL_ONE_MINUS_SRC1_COLOR,
55 GR_GL_SRC1_ALPHA,
56 GR_GL_ONE_MINUS_SRC1_ALPHA,
57 };
58
BlendCoeffReferencesConstant(GrBlendCoeff coeff)59 bool GrGpuGL::BlendCoeffReferencesConstant(GrBlendCoeff coeff) {
60 static const bool gCoeffReferencesBlendConst[] = {
61 false,
62 false,
63 false,
64 false,
65 false,
66 false,
67 false,
68 false,
69 false,
70 false,
71 true,
72 true,
73 true,
74 true,
75
76 // extended blend coeffs
77 false,
78 false,
79 false,
80 false,
81 };
82 return gCoeffReferencesBlendConst[coeff];
83 GR_STATIC_ASSERT(kTotalGrBlendCoeffCount ==
84 SK_ARRAY_COUNT(gCoeffReferencesBlendConst));
85
86 GR_STATIC_ASSERT(0 == kZero_GrBlendCoeff);
87 GR_STATIC_ASSERT(1 == kOne_GrBlendCoeff);
88 GR_STATIC_ASSERT(2 == kSC_GrBlendCoeff);
89 GR_STATIC_ASSERT(3 == kISC_GrBlendCoeff);
90 GR_STATIC_ASSERT(4 == kDC_GrBlendCoeff);
91 GR_STATIC_ASSERT(5 == kIDC_GrBlendCoeff);
92 GR_STATIC_ASSERT(6 == kSA_GrBlendCoeff);
93 GR_STATIC_ASSERT(7 == kISA_GrBlendCoeff);
94 GR_STATIC_ASSERT(8 == kDA_GrBlendCoeff);
95 GR_STATIC_ASSERT(9 == kIDA_GrBlendCoeff);
96 GR_STATIC_ASSERT(10 == kConstC_GrBlendCoeff);
97 GR_STATIC_ASSERT(11 == kIConstC_GrBlendCoeff);
98 GR_STATIC_ASSERT(12 == kConstA_GrBlendCoeff);
99 GR_STATIC_ASSERT(13 == kIConstA_GrBlendCoeff);
100
101 GR_STATIC_ASSERT(14 == kS2C_GrBlendCoeff);
102 GR_STATIC_ASSERT(15 == kIS2C_GrBlendCoeff);
103 GR_STATIC_ASSERT(16 == kS2A_GrBlendCoeff);
104 GR_STATIC_ASSERT(17 == kIS2A_GrBlendCoeff);
105
106 // assertion for gXfermodeCoeff2Blend have to be in GrGpu scope
107 GR_STATIC_ASSERT(kTotalGrBlendCoeffCount ==
108 SK_ARRAY_COUNT(gXfermodeCoeff2Blend));
109 }
110
111 ///////////////////////////////////////////////////////////////////////////////
112
113 static bool gPrintStartupSpew;
114
GrGpuGL(const GrGLContext & ctx,GrContext * context)115 GrGpuGL::GrGpuGL(const GrGLContext& ctx, GrContext* context)
116 : GrGpu(context)
117 , fGLContext(ctx) {
118
119 SkASSERT(ctx.isInitialized());
120 fCaps.reset(SkRef(ctx.caps()));
121
122 fHWBoundTextureUniqueIDs.reset(this->glCaps().maxFragmentTextureUnits());
123
124 GrGLClearErr(fGLContext.interface());
125 if (gPrintStartupSpew) {
126 const GrGLubyte* vendor;
127 const GrGLubyte* renderer;
128 const GrGLubyte* version;
129 GL_CALL_RET(vendor, GetString(GR_GL_VENDOR));
130 GL_CALL_RET(renderer, GetString(GR_GL_RENDERER));
131 GL_CALL_RET(version, GetString(GR_GL_VERSION));
132 GrPrintf("------------------------- create GrGpuGL %p --------------\n",
133 this);
134 GrPrintf("------ VENDOR %s\n", vendor);
135 GrPrintf("------ RENDERER %s\n", renderer);
136 GrPrintf("------ VERSION %s\n", version);
137 GrPrintf("------ EXTENSIONS\n");
138 ctx.extensions().print();
139 GrPrintf("\n");
140 GrPrintf(this->glCaps().dump().c_str());
141 }
142
143 fProgramCache = SkNEW_ARGS(ProgramCache, (this));
144
145 SkASSERT(this->glCaps().maxVertexAttributes() >= GrDrawState::kMaxVertexAttribCnt);
146
147 fLastSuccessfulStencilFmtIdx = 0;
148 fHWProgramID = 0;
149
150 if (this->glCaps().pathRenderingSupport()) {
151 fPathRendering.reset(new GrGLPathRendering(this));
152 }
153 }
154
~GrGpuGL()155 GrGpuGL::~GrGpuGL() {
156 if (0 != fHWProgramID) {
157 // detach the current program so there is no confusion on OpenGL's part
158 // that we want it to be deleted
159 SkASSERT(fHWProgramID == fCurrentProgram->programID());
160 GL_CALL(UseProgram(0));
161 }
162
163 delete fProgramCache;
164
165 // This must be called by before the GrDrawTarget destructor
166 this->releaseGeometry();
167 }
168
contextAbandoned()169 void GrGpuGL::contextAbandoned() {
170 INHERITED::contextAbandoned();
171 fProgramCache->abandon();
172 fHWProgramID = 0;
173 if (this->glCaps().pathRenderingSupport()) {
174 this->glPathRendering()->abandonGpuResources();
175 }
176 }
177
178 ///////////////////////////////////////////////////////////////////////////////
179
180
preferredReadPixelsConfig(GrPixelConfig readConfig,GrPixelConfig surfaceConfig) const181 GrPixelConfig GrGpuGL::preferredReadPixelsConfig(GrPixelConfig readConfig,
182 GrPixelConfig surfaceConfig) const {
183 if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && kRGBA_8888_GrPixelConfig == readConfig) {
184 return kBGRA_8888_GrPixelConfig;
185 } else if (this->glContext().isMesa() &&
186 GrBytesPerPixel(readConfig) == 4 &&
187 GrPixelConfigSwapRAndB(readConfig) == surfaceConfig) {
188 // Mesa 3D takes a slow path on when reading back BGRA from an RGBA surface and vice-versa.
189 // Perhaps this should be guarded by some compiletime or runtime check.
190 return surfaceConfig;
191 } else if (readConfig == kBGRA_8888_GrPixelConfig &&
192 !this->glCaps().readPixelsSupported(this->glInterface(),
193 GR_GL_BGRA, GR_GL_UNSIGNED_BYTE)) {
194 return kRGBA_8888_GrPixelConfig;
195 } else {
196 return readConfig;
197 }
198 }
199
preferredWritePixelsConfig(GrPixelConfig writeConfig,GrPixelConfig surfaceConfig) const200 GrPixelConfig GrGpuGL::preferredWritePixelsConfig(GrPixelConfig writeConfig,
201 GrPixelConfig surfaceConfig) const {
202 if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && kRGBA_8888_GrPixelConfig == writeConfig) {
203 return kBGRA_8888_GrPixelConfig;
204 } else {
205 return writeConfig;
206 }
207 }
208
canWriteTexturePixels(const GrTexture * texture,GrPixelConfig srcConfig) const209 bool GrGpuGL::canWriteTexturePixels(const GrTexture* texture, GrPixelConfig srcConfig) const {
210 if (kIndex_8_GrPixelConfig == srcConfig || kIndex_8_GrPixelConfig == texture->config()) {
211 return false;
212 }
213 if (srcConfig != texture->config() && kGLES_GrGLStandard == this->glStandard()) {
214 // In general ES2 requires the internal format of the texture and the format of the src
215 // pixels to match. However, It may or may not be possible to upload BGRA data to a RGBA
216 // texture. It depends upon which extension added BGRA. The Apple extension allows it
217 // (BGRA's internal format is RGBA) while the EXT extension does not (BGRA is its own
218 // internal format).
219 if (this->glCaps().isConfigTexturable(kBGRA_8888_GrPixelConfig) &&
220 !this->glCaps().bgraIsInternalFormat() &&
221 kBGRA_8888_GrPixelConfig == srcConfig &&
222 kRGBA_8888_GrPixelConfig == texture->config()) {
223 return true;
224 } else {
225 return false;
226 }
227 } else {
228 return true;
229 }
230 }
231
fullReadPixelsIsFasterThanPartial() const232 bool GrGpuGL::fullReadPixelsIsFasterThanPartial() const {
233 return SkToBool(GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL);
234 }
235
onResetContext(uint32_t resetBits)236 void GrGpuGL::onResetContext(uint32_t resetBits) {
237 // we don't use the zb at all
238 if (resetBits & kMisc_GrGLBackendState) {
239 GL_CALL(Disable(GR_GL_DEPTH_TEST));
240 GL_CALL(DepthMask(GR_GL_FALSE));
241
242 fHWDrawFace = GrDrawState::kInvalid_DrawFace;
243 fHWDitherEnabled = kUnknown_TriState;
244
245 if (kGL_GrGLStandard == this->glStandard()) {
246 // Desktop-only state that we never change
247 if (!this->glCaps().isCoreProfile()) {
248 GL_CALL(Disable(GR_GL_POINT_SMOOTH));
249 GL_CALL(Disable(GR_GL_LINE_SMOOTH));
250 GL_CALL(Disable(GR_GL_POLYGON_SMOOTH));
251 GL_CALL(Disable(GR_GL_POLYGON_STIPPLE));
252 GL_CALL(Disable(GR_GL_COLOR_LOGIC_OP));
253 GL_CALL(Disable(GR_GL_INDEX_LOGIC_OP));
254 }
255 // The windows NVIDIA driver has GL_ARB_imaging in the extension string when using a
256 // core profile. This seems like a bug since the core spec removes any mention of
257 // GL_ARB_imaging.
258 if (this->glCaps().imagingSupport() && !this->glCaps().isCoreProfile()) {
259 GL_CALL(Disable(GR_GL_COLOR_TABLE));
260 }
261 GL_CALL(Disable(GR_GL_POLYGON_OFFSET_FILL));
262 // Since ES doesn't support glPointSize at all we always use the VS to
263 // set the point size
264 GL_CALL(Enable(GR_GL_VERTEX_PROGRAM_POINT_SIZE));
265
266 // We should set glPolygonMode(FRONT_AND_BACK,FILL) here, too. It isn't
267 // currently part of our gl interface. There are probably others as
268 // well.
269 }
270
271 if (kGLES_GrGLStandard == this->glStandard() &&
272 fGLContext.hasExtension("GL_ARM_shader_framebuffer_fetch")) {
273 // The arm extension requires specifically enabling MSAA fetching per sample.
274 // On some devices this may have a perf hit. Also multiple render targets are disabled
275 GL_CALL(Enable(GR_GL_FETCH_PER_SAMPLE_ARM));
276 }
277 fHWWriteToColor = kUnknown_TriState;
278 // we only ever use lines in hairline mode
279 GL_CALL(LineWidth(1));
280 }
281
282 if (resetBits & kMSAAEnable_GrGLBackendState) {
283 fMSAAEnabled = kUnknown_TriState;
284 }
285
286 fHWActiveTextureUnitIdx = -1; // invalid
287
288 if (resetBits & kTextureBinding_GrGLBackendState) {
289 for (int s = 0; s < fHWBoundTextureUniqueIDs.count(); ++s) {
290 fHWBoundTextureUniqueIDs[s] = SK_InvalidUniqueID;
291 }
292 }
293
294 if (resetBits & kBlend_GrGLBackendState) {
295 fHWBlendState.invalidate();
296 }
297
298 if (resetBits & kView_GrGLBackendState) {
299 fHWScissorSettings.invalidate();
300 fHWViewport.invalidate();
301 }
302
303 if (resetBits & kStencil_GrGLBackendState) {
304 fHWStencilSettings.invalidate();
305 fHWStencilTestEnabled = kUnknown_TriState;
306 }
307
308 // Vertex
309 if (resetBits & kVertex_GrGLBackendState) {
310 fHWGeometryState.invalidate();
311 }
312
313 if (resetBits & kRenderTarget_GrGLBackendState) {
314 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
315 }
316
317 if (resetBits & kPathRendering_GrGLBackendState) {
318 if (this->caps()->pathRenderingSupport()) {
319 this->glPathRendering()->resetContext();
320 }
321 }
322
323 // we assume these values
324 if (resetBits & kPixelStore_GrGLBackendState) {
325 if (this->glCaps().unpackRowLengthSupport()) {
326 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
327 }
328 if (this->glCaps().packRowLengthSupport()) {
329 GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
330 }
331 if (this->glCaps().unpackFlipYSupport()) {
332 GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
333 }
334 if (this->glCaps().packFlipYSupport()) {
335 GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, GR_GL_FALSE));
336 }
337 }
338
339 if (resetBits & kProgram_GrGLBackendState) {
340 fHWProgramID = 0;
341 fSharedGLProgramState.invalidate();
342 }
343 }
344
345 namespace {
346
resolve_origin(GrSurfaceOrigin origin,bool renderTarget)347 GrSurfaceOrigin resolve_origin(GrSurfaceOrigin origin, bool renderTarget) {
348 // By default, GrRenderTargets are GL's normal orientation so that they
349 // can be drawn to by the outside world without the client having
350 // to render upside down.
351 if (kDefault_GrSurfaceOrigin == origin) {
352 return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
353 } else {
354 return origin;
355 }
356 }
357
358 }
359
onWrapBackendTexture(const GrBackendTextureDesc & desc)360 GrTexture* GrGpuGL::onWrapBackendTexture(const GrBackendTextureDesc& desc) {
361 if (!this->configToGLFormats(desc.fConfig, false, NULL, NULL, NULL)) {
362 return NULL;
363 }
364
365 if (0 == desc.fTextureHandle) {
366 return NULL;
367 }
368
369 int maxSize = this->caps()->maxTextureSize();
370 if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
371 return NULL;
372 }
373
374 GrGLTexture::Desc glTexDesc;
375 // next line relies on GrBackendTextureDesc's flags matching GrTexture's
376 glTexDesc.fFlags = (GrTextureFlags) desc.fFlags;
377 glTexDesc.fWidth = desc.fWidth;
378 glTexDesc.fHeight = desc.fHeight;
379 glTexDesc.fConfig = desc.fConfig;
380 glTexDesc.fSampleCnt = desc.fSampleCnt;
381 glTexDesc.fTextureID = static_cast<GrGLuint>(desc.fTextureHandle);
382 glTexDesc.fIsWrapped = true;
383 bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrBackendTextureFlag);
384 // FIXME: this should be calling resolve_origin(), but Chrome code is currently
385 // assuming the old behaviour, which is that backend textures are always
386 // BottomLeft, even for non-RT's. Once Chrome is fixed, change this to:
387 // glTexDesc.fOrigin = resolve_origin(desc.fOrigin, renderTarget);
388 if (kDefault_GrSurfaceOrigin == desc.fOrigin) {
389 glTexDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
390 } else {
391 glTexDesc.fOrigin = desc.fOrigin;
392 }
393
394 GrGLTexture* texture = NULL;
395 if (renderTarget) {
396 GrGLRenderTarget::Desc glRTDesc;
397 glRTDesc.fRTFBOID = 0;
398 glRTDesc.fTexFBOID = 0;
399 glRTDesc.fMSColorRenderbufferID = 0;
400 glRTDesc.fConfig = desc.fConfig;
401 glRTDesc.fSampleCnt = desc.fSampleCnt;
402 glRTDesc.fOrigin = glTexDesc.fOrigin;
403 glRTDesc.fCheckAllocation = false;
404 if (!this->createRenderTargetObjects(glTexDesc.fWidth,
405 glTexDesc.fHeight,
406 glTexDesc.fTextureID,
407 &glRTDesc)) {
408 return NULL;
409 }
410 texture = SkNEW_ARGS(GrGLTexture, (this, glTexDesc, glRTDesc));
411 } else {
412 texture = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
413 }
414 if (NULL == texture) {
415 return NULL;
416 }
417
418 return texture;
419 }
420
onWrapBackendRenderTarget(const GrBackendRenderTargetDesc & desc)421 GrRenderTarget* GrGpuGL::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
422 GrGLRenderTarget::Desc glDesc;
423 glDesc.fConfig = desc.fConfig;
424 glDesc.fRTFBOID = static_cast<GrGLuint>(desc.fRenderTargetHandle);
425 glDesc.fMSColorRenderbufferID = 0;
426 glDesc.fTexFBOID = GrGLRenderTarget::kUnresolvableFBOID;
427 glDesc.fSampleCnt = desc.fSampleCnt;
428 glDesc.fIsWrapped = true;
429 glDesc.fCheckAllocation = false;
430
431 glDesc.fOrigin = resolve_origin(desc.fOrigin, true);
432 GrGLIRect viewport;
433 viewport.fLeft = 0;
434 viewport.fBottom = 0;
435 viewport.fWidth = desc.fWidth;
436 viewport.fHeight = desc.fHeight;
437
438 GrRenderTarget* tgt = SkNEW_ARGS(GrGLRenderTarget,
439 (this, glDesc, viewport));
440 if (desc.fStencilBits) {
441 GrGLStencilBuffer::Format format;
442 format.fInternalFormat = GrGLStencilBuffer::kUnknownInternalFormat;
443 format.fPacked = false;
444 format.fStencilBits = desc.fStencilBits;
445 format.fTotalBits = desc.fStencilBits;
446 static const bool kIsSBWrapped = false;
447 GrGLStencilBuffer* sb = SkNEW_ARGS(GrGLStencilBuffer,
448 (this,
449 kIsSBWrapped,
450 0,
451 desc.fWidth,
452 desc.fHeight,
453 desc.fSampleCnt,
454 format));
455 tgt->setStencilBuffer(sb);
456 sb->unref();
457 }
458 return tgt;
459 }
460
461 ////////////////////////////////////////////////////////////////////////////////
462
onWriteTexturePixels(GrTexture * texture,int left,int top,int width,int height,GrPixelConfig config,const void * buffer,size_t rowBytes)463 bool GrGpuGL::onWriteTexturePixels(GrTexture* texture,
464 int left, int top, int width, int height,
465 GrPixelConfig config, const void* buffer,
466 size_t rowBytes) {
467 if (NULL == buffer) {
468 return false;
469 }
470 GrGLTexture* glTex = static_cast<GrGLTexture*>(texture);
471
472 this->setScratchTextureUnit();
473 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTex->textureID()));
474 GrGLTexture::Desc desc;
475 desc.fFlags = glTex->desc().fFlags;
476 desc.fWidth = glTex->width();
477 desc.fHeight = glTex->height();
478 desc.fConfig = glTex->config();
479 desc.fSampleCnt = glTex->desc().fSampleCnt;
480 desc.fTextureID = glTex->textureID();
481 desc.fOrigin = glTex->origin();
482
483 bool success = false;
484 if (GrPixelConfigIsCompressed(desc.fConfig)) {
485 // We check that config == desc.fConfig in GrGpuGL::canWriteTexturePixels()
486 SkASSERT(config == desc.fConfig);
487 success = this->uploadCompressedTexData(desc, buffer, false,
488 left, top, width, height);
489 } else {
490 success = this->uploadTexData(desc, false,
491 left, top, width, height,
492 config, buffer, rowBytes);
493 }
494
495 if (success) {
496 texture->impl()->dirtyMipMaps(true);
497 return true;
498 }
499
500 return false;
501 }
502
503 namespace {
adjust_pixel_ops_params(int surfaceWidth,int surfaceHeight,size_t bpp,int * left,int * top,int * width,int * height,const void ** data,size_t * rowBytes)504 bool adjust_pixel_ops_params(int surfaceWidth,
505 int surfaceHeight,
506 size_t bpp,
507 int* left, int* top, int* width, int* height,
508 const void** data,
509 size_t* rowBytes) {
510 if (!*rowBytes) {
511 *rowBytes = *width * bpp;
512 }
513
514 SkIRect subRect = SkIRect::MakeXYWH(*left, *top, *width, *height);
515 SkIRect bounds = SkIRect::MakeWH(surfaceWidth, surfaceHeight);
516
517 if (!subRect.intersect(bounds)) {
518 return false;
519 }
520 *data = reinterpret_cast<const void*>(reinterpret_cast<intptr_t>(*data) +
521 (subRect.fTop - *top) * *rowBytes + (subRect.fLeft - *left) * bpp);
522
523 *left = subRect.fLeft;
524 *top = subRect.fTop;
525 *width = subRect.width();
526 *height = subRect.height();
527 return true;
528 }
529
check_alloc_error(const GrTextureDesc & desc,const GrGLInterface * interface)530 GrGLenum check_alloc_error(const GrTextureDesc& desc, const GrGLInterface* interface) {
531 if (SkToBool(desc.fFlags & kCheckAllocation_GrTextureFlagBit)) {
532 return GR_GL_GET_ERROR(interface);
533 } else {
534 return CHECK_ALLOC_ERROR(interface);
535 }
536 }
537
538 }
539
uploadTexData(const GrGLTexture::Desc & desc,bool isNewTexture,int left,int top,int width,int height,GrPixelConfig dataConfig,const void * data,size_t rowBytes)540 bool GrGpuGL::uploadTexData(const GrGLTexture::Desc& desc,
541 bool isNewTexture,
542 int left, int top, int width, int height,
543 GrPixelConfig dataConfig,
544 const void* data,
545 size_t rowBytes) {
546 SkASSERT(data || isNewTexture);
547
548 // If we're uploading compressed data then we should be using uploadCompressedTexData
549 SkASSERT(!GrPixelConfigIsCompressed(dataConfig));
550
551 size_t bpp = GrBytesPerPixel(dataConfig);
552 if (!adjust_pixel_ops_params(desc.fWidth, desc.fHeight, bpp, &left, &top,
553 &width, &height, &data, &rowBytes)) {
554 return false;
555 }
556 size_t trimRowBytes = width * bpp;
557
558 // in case we need a temporary, trimmed copy of the src pixels
559 GrAutoMalloc<128 * 128> tempStorage;
560
561 // We currently lazily create MIPMAPs when the we see a draw with
562 // GrTextureParams::kMipMap_FilterMode. Using texture storage requires that the
563 // MIP levels are all created when the texture is created. So for now we don't use
564 // texture storage.
565 bool useTexStorage = false &&
566 isNewTexture &&
567 this->glCaps().texStorageSupport();
568
569 if (useTexStorage && kGL_GrGLStandard == this->glStandard()) {
570 // 565 is not a sized internal format on desktop GL. So on desktop with
571 // 565 we always use an unsized internal format to let the system pick
572 // the best sized format to convert the 565 data to. Since TexStorage
573 // only allows sized internal formats we will instead use TexImage2D.
574 useTexStorage = desc.fConfig != kRGB_565_GrPixelConfig;
575 }
576
577 GrGLenum internalFormat;
578 GrGLenum externalFormat = 0x0; // suprress warning
579 GrGLenum externalType = 0x0;// suprress warning
580
581 // glTexStorage requires sized internal formats on both desktop and ES. ES2 requires an unsized
582 // format for glTexImage, unlike ES3 and desktop. However, we allow the driver to decide the
583 // size of the internal format whenever possible and so only use a sized internal format when
584 // using texture storage.
585 bool useSizedFormat = useTexStorage;
586 // At least some versions of the desktop ES3 drivers for NVIDIA won't accept GL_RED in
587 // glTexImage2D for the internal format but will accept GL_R8.
588 if (!useSizedFormat && kNVIDIA_GrGLVendor == this->glContext().vendor() &&
589 kGLES_GrGLStandard == this->glStandard() && this->glVersion() >= GR_GL_VER(3, 0)) {
590 useSizedFormat = true;
591 }
592 if (!this->configToGLFormats(dataConfig, useSizedFormat, &internalFormat,
593 &externalFormat, &externalType)) {
594 return false;
595 }
596
597 /*
598 * check whether to allocate a temporary buffer for flipping y or
599 * because our srcData has extra bytes past each row. If so, we need
600 * to trim those off here, since GL ES may not let us specify
601 * GL_UNPACK_ROW_LENGTH.
602 */
603 bool restoreGLRowLength = false;
604 bool swFlipY = false;
605 bool glFlipY = false;
606 if (data) {
607 if (kBottomLeft_GrSurfaceOrigin == desc.fOrigin) {
608 if (this->glCaps().unpackFlipYSupport()) {
609 glFlipY = true;
610 } else {
611 swFlipY = true;
612 }
613 }
614 if (this->glCaps().unpackRowLengthSupport() && !swFlipY) {
615 // can't use this for flipping, only non-neg values allowed. :(
616 if (rowBytes != trimRowBytes) {
617 GrGLint rowLength = static_cast<GrGLint>(rowBytes / bpp);
618 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, rowLength));
619 restoreGLRowLength = true;
620 }
621 } else {
622 if (trimRowBytes != rowBytes || swFlipY) {
623 // copy data into our new storage, skipping the trailing bytes
624 size_t trimSize = height * trimRowBytes;
625 const char* src = (const char*)data;
626 if (swFlipY) {
627 src += (height - 1) * rowBytes;
628 }
629 char* dst = (char*)tempStorage.reset(trimSize);
630 for (int y = 0; y < height; y++) {
631 memcpy(dst, src, trimRowBytes);
632 if (swFlipY) {
633 src -= rowBytes;
634 } else {
635 src += rowBytes;
636 }
637 dst += trimRowBytes;
638 }
639 // now point data to our copied version
640 data = tempStorage.get();
641 }
642 }
643 if (glFlipY) {
644 GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_TRUE));
645 }
646 GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT,
647 static_cast<GrGLint>(GrUnpackAlignment(dataConfig))));
648 }
649 bool succeeded = true;
650 if (isNewTexture &&
651 0 == left && 0 == top &&
652 desc.fWidth == width && desc.fHeight == height) {
653 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
654 if (useTexStorage) {
655 // We never resize or change formats of textures.
656 GL_ALLOC_CALL(this->glInterface(),
657 TexStorage2D(GR_GL_TEXTURE_2D,
658 1, // levels
659 internalFormat,
660 desc.fWidth, desc.fHeight));
661 } else {
662 GL_ALLOC_CALL(this->glInterface(),
663 TexImage2D(GR_GL_TEXTURE_2D,
664 0, // level
665 internalFormat,
666 desc.fWidth, desc.fHeight,
667 0, // border
668 externalFormat, externalType,
669 data));
670 }
671 GrGLenum error = check_alloc_error(desc, this->glInterface());
672 if (error != GR_GL_NO_ERROR) {
673 succeeded = false;
674 } else {
675 // if we have data and we used TexStorage to create the texture, we
676 // now upload with TexSubImage.
677 if (data && useTexStorage) {
678 GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
679 0, // level
680 left, top,
681 width, height,
682 externalFormat, externalType,
683 data));
684 }
685 }
686 } else {
687 if (swFlipY || glFlipY) {
688 top = desc.fHeight - (top + height);
689 }
690 GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
691 0, // level
692 left, top,
693 width, height,
694 externalFormat, externalType, data));
695 }
696
697 if (restoreGLRowLength) {
698 SkASSERT(this->glCaps().unpackRowLengthSupport());
699 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
700 }
701 if (glFlipY) {
702 GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
703 }
704 return succeeded;
705 }
706
707 // TODO: This function is using a lot of wonky semantics like, if width == -1
708 // then set width = desc.fWdith ... blah. A better way to do it might be to
709 // create a CompressedTexData struct that takes a desc/ptr and figures out
710 // the proper upload semantics. Then users can construct this function how they
711 // see fit if they want to go against the "standard" way to do it.
uploadCompressedTexData(const GrGLTexture::Desc & desc,const void * data,bool isNewTexture,int left,int top,int width,int height)712 bool GrGpuGL::uploadCompressedTexData(const GrGLTexture::Desc& desc,
713 const void* data,
714 bool isNewTexture,
715 int left, int top, int width, int height) {
716 SkASSERT(data || isNewTexture);
717
718 // No support for software flip y, yet...
719 SkASSERT(kBottomLeft_GrSurfaceOrigin != desc.fOrigin);
720
721 if (-1 == width) {
722 width = desc.fWidth;
723 }
724 #ifdef SK_DEBUG
725 else {
726 SkASSERT(width <= desc.fWidth);
727 }
728 #endif
729
730 if (-1 == height) {
731 height = desc.fHeight;
732 }
733 #ifdef SK_DEBUG
734 else {
735 SkASSERT(height <= desc.fHeight);
736 }
737 #endif
738
739 // Make sure that the width and height that we pass to OpenGL
740 // is a multiple of the block size.
741 int dataSize = GrCompressedFormatDataSize(desc.fConfig, width, height);
742
743 // We only need the internal format for compressed 2D textures.
744 GrGLenum internalFormat = 0;
745 if (!this->configToGLFormats(desc.fConfig, false, &internalFormat, NULL, NULL)) {
746 return false;
747 }
748
749 if (isNewTexture) {
750 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
751 GL_ALLOC_CALL(this->glInterface(),
752 CompressedTexImage2D(GR_GL_TEXTURE_2D,
753 0, // level
754 internalFormat,
755 width, height,
756 0, // border
757 dataSize,
758 data));
759 GrGLenum error = check_alloc_error(desc, this->glInterface());
760 if (error != GR_GL_NO_ERROR) {
761 return false;
762 }
763 } else {
764 // Paletted textures can't be updated.
765 if (GR_GL_PALETTE8_RGBA8 == internalFormat) {
766 return false;
767 }
768 GL_CALL(CompressedTexSubImage2D(GR_GL_TEXTURE_2D,
769 0, // level
770 left, top,
771 width, height,
772 internalFormat,
773 dataSize,
774 data));
775 }
776
777 return true;
778 }
779
renderbuffer_storage_msaa(GrGLContext & ctx,int sampleCount,GrGLenum format,int width,int height)780 static bool renderbuffer_storage_msaa(GrGLContext& ctx,
781 int sampleCount,
782 GrGLenum format,
783 int width, int height) {
784 CLEAR_ERROR_BEFORE_ALLOC(ctx.interface());
785 SkASSERT(GrGLCaps::kNone_MSFBOType != ctx.caps()->msFBOType());
786 switch (ctx.caps()->msFBOType()) {
787 case GrGLCaps::kDesktop_ARB_MSFBOType:
788 case GrGLCaps::kDesktop_EXT_MSFBOType:
789 case GrGLCaps::kES_3_0_MSFBOType:
790 GL_ALLOC_CALL(ctx.interface(),
791 RenderbufferStorageMultisample(GR_GL_RENDERBUFFER,
792 sampleCount,
793 format,
794 width, height));
795 break;
796 case GrGLCaps::kES_Apple_MSFBOType:
797 GL_ALLOC_CALL(ctx.interface(),
798 RenderbufferStorageMultisampleES2APPLE(GR_GL_RENDERBUFFER,
799 sampleCount,
800 format,
801 width, height));
802 break;
803 case GrGLCaps::kES_EXT_MsToTexture_MSFBOType:
804 case GrGLCaps::kES_IMG_MsToTexture_MSFBOType:
805 GL_ALLOC_CALL(ctx.interface(),
806 RenderbufferStorageMultisampleES2EXT(GR_GL_RENDERBUFFER,
807 sampleCount,
808 format,
809 width, height));
810 break;
811 case GrGLCaps::kNone_MSFBOType:
812 SkFAIL("Shouldn't be here if we don't support multisampled renderbuffers.");
813 break;
814 }
815 return (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctx.interface()));;
816 }
817
createRenderTargetObjects(int width,int height,GrGLuint texID,GrGLRenderTarget::Desc * desc)818 bool GrGpuGL::createRenderTargetObjects(int width, int height,
819 GrGLuint texID,
820 GrGLRenderTarget::Desc* desc) {
821 desc->fMSColorRenderbufferID = 0;
822 desc->fRTFBOID = 0;
823 desc->fTexFBOID = 0;
824 desc->fIsWrapped = false;
825
826 GrGLenum status;
827
828 GrGLenum msColorFormat = 0; // suppress warning
829
830 if (desc->fSampleCnt > 0 && GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType()) {
831 goto FAILED;
832 }
833
834 GL_CALL(GenFramebuffers(1, &desc->fTexFBOID));
835 if (!desc->fTexFBOID) {
836 goto FAILED;
837 }
838
839
840 // If we are using multisampling we will create two FBOS. We render to one and then resolve to
841 // the texture bound to the other. The exception is the IMG multisample extension. With this
842 // extension the texture is multisampled when rendered to and then auto-resolves it when it is
843 // rendered from.
844 if (desc->fSampleCnt > 0 && this->glCaps().usesMSAARenderBuffers()) {
845 GL_CALL(GenFramebuffers(1, &desc->fRTFBOID));
846 GL_CALL(GenRenderbuffers(1, &desc->fMSColorRenderbufferID));
847 if (!desc->fRTFBOID ||
848 !desc->fMSColorRenderbufferID ||
849 !this->configToGLFormats(desc->fConfig,
850 // ES2 and ES3 require sized internal formats for rb storage.
851 kGLES_GrGLStandard == this->glStandard(),
852 &msColorFormat,
853 NULL,
854 NULL)) {
855 goto FAILED;
856 }
857 } else {
858 desc->fRTFBOID = desc->fTexFBOID;
859 }
860
861 // below here we may bind the FBO
862 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
863 if (desc->fRTFBOID != desc->fTexFBOID) {
864 SkASSERT(desc->fSampleCnt > 0);
865 GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER,
866 desc->fMSColorRenderbufferID));
867 if (!renderbuffer_storage_msaa(fGLContext,
868 desc->fSampleCnt,
869 msColorFormat,
870 width, height)) {
871 goto FAILED;
872 }
873 fGPUStats.incRenderTargetBinds();
874 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, desc->fRTFBOID));
875 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
876 GR_GL_COLOR_ATTACHMENT0,
877 GR_GL_RENDERBUFFER,
878 desc->fMSColorRenderbufferID));
879 if (desc->fCheckAllocation ||
880 !this->glCaps().isConfigVerifiedColorAttachment(desc->fConfig)) {
881 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
882 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
883 goto FAILED;
884 }
885 fGLContext.caps()->markConfigAsValidColorAttachment(desc->fConfig);
886 }
887 }
888 fGPUStats.incRenderTargetBinds();
889 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, desc->fTexFBOID));
890
891 if (this->glCaps().usesImplicitMSAAResolve() && desc->fSampleCnt > 0) {
892 GL_CALL(FramebufferTexture2DMultisample(GR_GL_FRAMEBUFFER,
893 GR_GL_COLOR_ATTACHMENT0,
894 GR_GL_TEXTURE_2D,
895 texID, 0, desc->fSampleCnt));
896 } else {
897 GL_CALL(FramebufferTexture2D(GR_GL_FRAMEBUFFER,
898 GR_GL_COLOR_ATTACHMENT0,
899 GR_GL_TEXTURE_2D,
900 texID, 0));
901 }
902 if (desc->fCheckAllocation ||
903 !this->glCaps().isConfigVerifiedColorAttachment(desc->fConfig)) {
904 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
905 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
906 goto FAILED;
907 }
908 fGLContext.caps()->markConfigAsValidColorAttachment(desc->fConfig);
909 }
910
911 return true;
912
913 FAILED:
914 if (desc->fMSColorRenderbufferID) {
915 GL_CALL(DeleteRenderbuffers(1, &desc->fMSColorRenderbufferID));
916 }
917 if (desc->fRTFBOID != desc->fTexFBOID) {
918 GL_CALL(DeleteFramebuffers(1, &desc->fRTFBOID));
919 }
920 if (desc->fTexFBOID) {
921 GL_CALL(DeleteFramebuffers(1, &desc->fTexFBOID));
922 }
923 return false;
924 }
925
926 // good to set a break-point here to know when createTexture fails
return_null_texture()927 static GrTexture* return_null_texture() {
928 // SkDEBUGFAIL("null texture");
929 return NULL;
930 }
931
932 #if 0 && defined(SK_DEBUG)
933 static size_t as_size_t(int x) {
934 return x;
935 }
936 #endif
937
onCreateTexture(const GrTextureDesc & desc,const void * srcData,size_t rowBytes)938 GrTexture* GrGpuGL::onCreateTexture(const GrTextureDesc& desc,
939 const void* srcData,
940 size_t rowBytes) {
941
942 GrGLTexture::Desc glTexDesc;
943 GrGLRenderTarget::Desc glRTDesc;
944
945 // Attempt to catch un- or wrongly initialized sample counts;
946 SkASSERT(desc.fSampleCnt >= 0 && desc.fSampleCnt <= 64);
947 // We fail if the MSAA was requested and is not available.
948 if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType() && desc.fSampleCnt) {
949 //GrPrintf("MSAA RT requested but not supported on this platform.");
950 return return_null_texture();
951 }
952 // If the sample count exceeds the max then we clamp it.
953 glTexDesc.fSampleCnt = SkTMin(desc.fSampleCnt, this->caps()->maxSampleCount());
954
955 glTexDesc.fFlags = desc.fFlags;
956 glTexDesc.fWidth = desc.fWidth;
957 glTexDesc.fHeight = desc.fHeight;
958 glTexDesc.fConfig = desc.fConfig;
959 glTexDesc.fIsWrapped = false;
960
961 glRTDesc.fMSColorRenderbufferID = 0;
962 glRTDesc.fRTFBOID = 0;
963 glRTDesc.fTexFBOID = 0;
964 glRTDesc.fIsWrapped = false;
965 glRTDesc.fConfig = glTexDesc.fConfig;
966 glRTDesc.fCheckAllocation = SkToBool(desc.fFlags & kCheckAllocation_GrTextureFlagBit);
967
968 bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrTextureFlagBit);
969
970 glTexDesc.fOrigin = resolve_origin(desc.fOrigin, renderTarget);
971 glRTDesc.fOrigin = glTexDesc.fOrigin;
972
973 glRTDesc.fSampleCnt = glTexDesc.fSampleCnt;
974 if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType() &&
975 desc.fSampleCnt) {
976 //GrPrintf("MSAA RT requested but not supported on this platform.");
977 return return_null_texture();
978 }
979
980 if (renderTarget) {
981 int maxRTSize = this->caps()->maxRenderTargetSize();
982 if (glTexDesc.fWidth > maxRTSize || glTexDesc.fHeight > maxRTSize) {
983 return return_null_texture();
984 }
985 } else {
986 int maxSize = this->caps()->maxTextureSize();
987 if (glTexDesc.fWidth > maxSize || glTexDesc.fHeight > maxSize) {
988 return return_null_texture();
989 }
990 }
991
992 GL_CALL(GenTextures(1, &glTexDesc.fTextureID));
993
994 if (!glTexDesc.fTextureID) {
995 return return_null_texture();
996 }
997
998 this->setScratchTextureUnit();
999 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTexDesc.fTextureID));
1000
1001 if (renderTarget && this->glCaps().textureUsageSupport()) {
1002 // provides a hint about how this texture will be used
1003 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1004 GR_GL_TEXTURE_USAGE,
1005 GR_GL_FRAMEBUFFER_ATTACHMENT));
1006 }
1007
1008 // Some drivers like to know filter/wrap before seeing glTexImage2D. Some
1009 // drivers have a bug where an FBO won't be complete if it includes a
1010 // texture that is not mipmap complete (considering the filter in use).
1011 GrGLTexture::TexParams initialTexParams;
1012 // we only set a subset here so invalidate first
1013 initialTexParams.invalidate();
1014 initialTexParams.fMinFilter = GR_GL_NEAREST;
1015 initialTexParams.fMagFilter = GR_GL_NEAREST;
1016 initialTexParams.fWrapS = GR_GL_CLAMP_TO_EDGE;
1017 initialTexParams.fWrapT = GR_GL_CLAMP_TO_EDGE;
1018 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1019 GR_GL_TEXTURE_MAG_FILTER,
1020 initialTexParams.fMagFilter));
1021 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1022 GR_GL_TEXTURE_MIN_FILTER,
1023 initialTexParams.fMinFilter));
1024 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1025 GR_GL_TEXTURE_WRAP_S,
1026 initialTexParams.fWrapS));
1027 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1028 GR_GL_TEXTURE_WRAP_T,
1029 initialTexParams.fWrapT));
1030 if (!this->uploadTexData(glTexDesc, true, 0, 0,
1031 glTexDesc.fWidth, glTexDesc.fHeight,
1032 desc.fConfig, srcData, rowBytes)) {
1033 GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
1034 return return_null_texture();
1035 }
1036
1037 GrGLTexture* tex;
1038 if (renderTarget) {
1039 // unbind the texture from the texture unit before binding it to the frame buffer
1040 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, 0));
1041
1042 if (!this->createRenderTargetObjects(glTexDesc.fWidth,
1043 glTexDesc.fHeight,
1044 glTexDesc.fTextureID,
1045 &glRTDesc)) {
1046 GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
1047 return return_null_texture();
1048 }
1049 tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc, glRTDesc));
1050 } else {
1051 tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
1052 }
1053 tex->setCachedTexParams(initialTexParams, this->getResetTimestamp());
1054 #ifdef TRACE_TEXTURE_CREATION
1055 GrPrintf("--- new texture [%d] size=(%d %d) config=%d\n",
1056 glTexDesc.fTextureID, desc.fWidth, desc.fHeight, desc.fConfig);
1057 #endif
1058 return tex;
1059 }
1060
onCreateCompressedTexture(const GrTextureDesc & desc,const void * srcData)1061 GrTexture* GrGpuGL::onCreateCompressedTexture(const GrTextureDesc& desc,
1062 const void* srcData) {
1063
1064 if(SkToBool(desc.fFlags & kRenderTarget_GrTextureFlagBit)) {
1065 return return_null_texture();
1066 }
1067
1068 // Make sure that we're not flipping Y.
1069 GrSurfaceOrigin texOrigin = resolve_origin(desc.fOrigin, false);
1070 if (kBottomLeft_GrSurfaceOrigin == texOrigin) {
1071 return return_null_texture();
1072 }
1073
1074 GrGLTexture::Desc glTexDesc;
1075
1076 glTexDesc.fFlags = desc.fFlags;
1077 glTexDesc.fWidth = desc.fWidth;
1078 glTexDesc.fHeight = desc.fHeight;
1079 glTexDesc.fConfig = desc.fConfig;
1080 glTexDesc.fIsWrapped = false;
1081 glTexDesc.fOrigin = texOrigin;
1082
1083 int maxSize = this->caps()->maxTextureSize();
1084 if (glTexDesc.fWidth > maxSize || glTexDesc.fHeight > maxSize) {
1085 return return_null_texture();
1086 }
1087
1088 GL_CALL(GenTextures(1, &glTexDesc.fTextureID));
1089
1090 if (!glTexDesc.fTextureID) {
1091 return return_null_texture();
1092 }
1093
1094 this->setScratchTextureUnit();
1095 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTexDesc.fTextureID));
1096
1097 // Some drivers like to know filter/wrap before seeing glTexImage2D. Some
1098 // drivers have a bug where an FBO won't be complete if it includes a
1099 // texture that is not mipmap complete (considering the filter in use).
1100 GrGLTexture::TexParams initialTexParams;
1101 // we only set a subset here so invalidate first
1102 initialTexParams.invalidate();
1103 initialTexParams.fMinFilter = GR_GL_NEAREST;
1104 initialTexParams.fMagFilter = GR_GL_NEAREST;
1105 initialTexParams.fWrapS = GR_GL_CLAMP_TO_EDGE;
1106 initialTexParams.fWrapT = GR_GL_CLAMP_TO_EDGE;
1107 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1108 GR_GL_TEXTURE_MAG_FILTER,
1109 initialTexParams.fMagFilter));
1110 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1111 GR_GL_TEXTURE_MIN_FILTER,
1112 initialTexParams.fMinFilter));
1113 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1114 GR_GL_TEXTURE_WRAP_S,
1115 initialTexParams.fWrapS));
1116 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1117 GR_GL_TEXTURE_WRAP_T,
1118 initialTexParams.fWrapT));
1119
1120 if (!this->uploadCompressedTexData(glTexDesc, srcData)) {
1121 GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
1122 return return_null_texture();
1123 }
1124
1125 GrGLTexture* tex;
1126 tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
1127 tex->setCachedTexParams(initialTexParams, this->getResetTimestamp());
1128 #ifdef TRACE_TEXTURE_CREATION
1129 GrPrintf("--- new compressed texture [%d] size=(%d %d) config=%d\n",
1130 glTexDesc.fTextureID, desc.fWidth, desc.fHeight, desc.fConfig);
1131 #endif
1132 return tex;
1133 }
1134
1135 namespace {
1136
1137 const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
1138
get_stencil_rb_sizes(const GrGLInterface * gl,GrGLStencilBuffer::Format * format)1139 void inline get_stencil_rb_sizes(const GrGLInterface* gl,
1140 GrGLStencilBuffer::Format* format) {
1141
1142 // we shouldn't ever know one size and not the other
1143 SkASSERT((kUnknownBitCount == format->fStencilBits) ==
1144 (kUnknownBitCount == format->fTotalBits));
1145 if (kUnknownBitCount == format->fStencilBits) {
1146 GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
1147 GR_GL_RENDERBUFFER_STENCIL_SIZE,
1148 (GrGLint*)&format->fStencilBits);
1149 if (format->fPacked) {
1150 GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
1151 GR_GL_RENDERBUFFER_DEPTH_SIZE,
1152 (GrGLint*)&format->fTotalBits);
1153 format->fTotalBits += format->fStencilBits;
1154 } else {
1155 format->fTotalBits = format->fStencilBits;
1156 }
1157 }
1158 }
1159 }
1160
createStencilBufferForRenderTarget(GrRenderTarget * rt,int width,int height)1161 bool GrGpuGL::createStencilBufferForRenderTarget(GrRenderTarget* rt,
1162 int width, int height) {
1163
1164 // All internally created RTs are also textures. We don't create
1165 // SBs for a client's standalone RT (that is a RT that isn't also a texture).
1166 SkASSERT(rt->asTexture());
1167 SkASSERT(width >= rt->width());
1168 SkASSERT(height >= rt->height());
1169
1170 int samples = rt->numSamples();
1171 GrGLuint sbID;
1172 GL_CALL(GenRenderbuffers(1, &sbID));
1173 if (!sbID) {
1174 return false;
1175 }
1176
1177 int stencilFmtCnt = this->glCaps().stencilFormats().count();
1178 for (int i = 0; i < stencilFmtCnt; ++i) {
1179 GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, sbID));
1180 // we start with the last stencil format that succeeded in hopes
1181 // that we won't go through this loop more than once after the
1182 // first (painful) stencil creation.
1183 int sIdx = (i + fLastSuccessfulStencilFmtIdx) % stencilFmtCnt;
1184 const GrGLCaps::StencilFormat& sFmt =
1185 this->glCaps().stencilFormats()[sIdx];
1186 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
1187 // we do this "if" so that we don't call the multisample
1188 // version on a GL that doesn't have an MSAA extension.
1189 bool created;
1190 if (samples > 0) {
1191 created = renderbuffer_storage_msaa(fGLContext,
1192 samples,
1193 sFmt.fInternalFormat,
1194 width, height);
1195 } else {
1196 GL_ALLOC_CALL(this->glInterface(),
1197 RenderbufferStorage(GR_GL_RENDERBUFFER,
1198 sFmt.fInternalFormat,
1199 width, height));
1200 created =
1201 (GR_GL_NO_ERROR == check_alloc_error(rt->desc(), this->glInterface()));
1202 }
1203 if (created) {
1204 // After sized formats we attempt an unsized format and take
1205 // whatever sizes GL gives us. In that case we query for the size.
1206 GrGLStencilBuffer::Format format = sFmt;
1207 get_stencil_rb_sizes(this->glInterface(), &format);
1208 static const bool kIsWrapped = false;
1209 SkAutoTUnref<GrStencilBuffer> sb(SkNEW_ARGS(GrGLStencilBuffer,
1210 (this, kIsWrapped, sbID, width, height,
1211 samples, format)));
1212 if (this->attachStencilBufferToRenderTarget(sb, rt)) {
1213 fLastSuccessfulStencilFmtIdx = sIdx;
1214 sb->transferToCache();
1215 rt->setStencilBuffer(sb);
1216 return true;
1217 }
1218 sb->abandon(); // otherwise we lose sbID
1219 }
1220 }
1221 GL_CALL(DeleteRenderbuffers(1, &sbID));
1222 return false;
1223 }
1224
attachStencilBufferToRenderTarget(GrStencilBuffer * sb,GrRenderTarget * rt)1225 bool GrGpuGL::attachStencilBufferToRenderTarget(GrStencilBuffer* sb, GrRenderTarget* rt) {
1226 GrGLRenderTarget* glrt = (GrGLRenderTarget*) rt;
1227
1228 GrGLuint fbo = glrt->renderFBOID();
1229
1230 if (NULL == sb) {
1231 if (rt->getStencilBuffer()) {
1232 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1233 GR_GL_STENCIL_ATTACHMENT,
1234 GR_GL_RENDERBUFFER, 0));
1235 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1236 GR_GL_DEPTH_ATTACHMENT,
1237 GR_GL_RENDERBUFFER, 0));
1238 #ifdef SK_DEBUG
1239 GrGLenum status;
1240 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
1241 SkASSERT(GR_GL_FRAMEBUFFER_COMPLETE == status);
1242 #endif
1243 }
1244 return true;
1245 } else {
1246 GrGLStencilBuffer* glsb = static_cast<GrGLStencilBuffer*>(sb);
1247 GrGLuint rb = glsb->renderbufferID();
1248
1249 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1250 fGPUStats.incRenderTargetBinds();
1251 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, fbo));
1252 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1253 GR_GL_STENCIL_ATTACHMENT,
1254 GR_GL_RENDERBUFFER, rb));
1255 if (glsb->format().fPacked) {
1256 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1257 GR_GL_DEPTH_ATTACHMENT,
1258 GR_GL_RENDERBUFFER, rb));
1259 } else {
1260 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1261 GR_GL_DEPTH_ATTACHMENT,
1262 GR_GL_RENDERBUFFER, 0));
1263 }
1264
1265 GrGLenum status;
1266 if (!this->glCaps().isColorConfigAndStencilFormatVerified(rt->config(), glsb->format())) {
1267 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
1268 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
1269 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1270 GR_GL_STENCIL_ATTACHMENT,
1271 GR_GL_RENDERBUFFER, 0));
1272 if (glsb->format().fPacked) {
1273 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1274 GR_GL_DEPTH_ATTACHMENT,
1275 GR_GL_RENDERBUFFER, 0));
1276 }
1277 return false;
1278 } else {
1279 fGLContext.caps()->markColorConfigAndStencilFormatAsVerified(
1280 rt->config(),
1281 glsb->format());
1282 }
1283 }
1284 return true;
1285 }
1286 }
1287
1288 ////////////////////////////////////////////////////////////////////////////////
1289
onCreateVertexBuffer(size_t size,bool dynamic)1290 GrVertexBuffer* GrGpuGL::onCreateVertexBuffer(size_t size, bool dynamic) {
1291 GrGLVertexBuffer::Desc desc;
1292 desc.fDynamic = dynamic;
1293 desc.fSizeInBytes = size;
1294 desc.fIsWrapped = false;
1295
1296 if (this->glCaps().useNonVBOVertexAndIndexDynamicData() && desc.fDynamic) {
1297 desc.fID = 0;
1298 GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer, (this, desc));
1299 return vertexBuffer;
1300 } else {
1301 GL_CALL(GenBuffers(1, &desc.fID));
1302 if (desc.fID) {
1303 fHWGeometryState.setVertexBufferID(this, desc.fID);
1304 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
1305 // make sure driver can allocate memory for this buffer
1306 GL_ALLOC_CALL(this->glInterface(),
1307 BufferData(GR_GL_ARRAY_BUFFER,
1308 (GrGLsizeiptr) desc.fSizeInBytes,
1309 NULL, // data ptr
1310 desc.fDynamic ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
1311 if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
1312 GL_CALL(DeleteBuffers(1, &desc.fID));
1313 this->notifyVertexBufferDelete(desc.fID);
1314 return NULL;
1315 }
1316 GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer, (this, desc));
1317 return vertexBuffer;
1318 }
1319 return NULL;
1320 }
1321 }
1322
onCreateIndexBuffer(size_t size,bool dynamic)1323 GrIndexBuffer* GrGpuGL::onCreateIndexBuffer(size_t size, bool dynamic) {
1324 GrGLIndexBuffer::Desc desc;
1325 desc.fDynamic = dynamic;
1326 desc.fSizeInBytes = size;
1327 desc.fIsWrapped = false;
1328
1329 if (this->glCaps().useNonVBOVertexAndIndexDynamicData() && desc.fDynamic) {
1330 desc.fID = 0;
1331 GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer, (this, desc));
1332 return indexBuffer;
1333 } else {
1334 GL_CALL(GenBuffers(1, &desc.fID));
1335 if (desc.fID) {
1336 fHWGeometryState.setIndexBufferIDOnDefaultVertexArray(this, desc.fID);
1337 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
1338 // make sure driver can allocate memory for this buffer
1339 GL_ALLOC_CALL(this->glInterface(),
1340 BufferData(GR_GL_ELEMENT_ARRAY_BUFFER,
1341 (GrGLsizeiptr) desc.fSizeInBytes,
1342 NULL, // data ptr
1343 desc.fDynamic ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
1344 if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
1345 GL_CALL(DeleteBuffers(1, &desc.fID));
1346 this->notifyIndexBufferDelete(desc.fID);
1347 return NULL;
1348 }
1349 GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer, (this, desc));
1350 return indexBuffer;
1351 }
1352 return NULL;
1353 }
1354 }
1355
flushScissor(const GrGLIRect & rtViewport,GrSurfaceOrigin rtOrigin)1356 void GrGpuGL::flushScissor(const GrGLIRect& rtViewport, GrSurfaceOrigin rtOrigin) {
1357 if (fScissorState.fEnabled) {
1358 GrGLIRect scissor;
1359 scissor.setRelativeTo(rtViewport,
1360 fScissorState.fRect.fLeft,
1361 fScissorState.fRect.fTop,
1362 fScissorState.fRect.width(),
1363 fScissorState.fRect.height(),
1364 rtOrigin);
1365 // if the scissor fully contains the viewport then we fall through and
1366 // disable the scissor test.
1367 if (!scissor.contains(rtViewport)) {
1368 if (fHWScissorSettings.fRect != scissor) {
1369 scissor.pushToGLScissor(this->glInterface());
1370 fHWScissorSettings.fRect = scissor;
1371 }
1372 if (kYes_TriState != fHWScissorSettings.fEnabled) {
1373 GL_CALL(Enable(GR_GL_SCISSOR_TEST));
1374 fHWScissorSettings.fEnabled = kYes_TriState;
1375 }
1376 return;
1377 }
1378 }
1379 if (kNo_TriState != fHWScissorSettings.fEnabled) {
1380 GL_CALL(Disable(GR_GL_SCISSOR_TEST));
1381 fHWScissorSettings.fEnabled = kNo_TriState;
1382 return;
1383 }
1384 }
1385
onClear(GrRenderTarget * target,const SkIRect * rect,GrColor color,bool canIgnoreRect)1386 void GrGpuGL::onClear(GrRenderTarget* target, const SkIRect* rect, GrColor color,
1387 bool canIgnoreRect) {
1388 // parent class should never let us get here with no RT
1389 SkASSERT(target);
1390 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(target);
1391
1392 if (canIgnoreRect && this->glCaps().fullClearIsFree()) {
1393 rect = NULL;
1394 }
1395
1396 SkIRect clippedRect;
1397 if (rect) {
1398 // flushScissor expects rect to be clipped to the target.
1399 clippedRect = *rect;
1400 SkIRect rtRect = SkIRect::MakeWH(target->width(), target->height());
1401 if (clippedRect.intersect(rtRect)) {
1402 rect = &clippedRect;
1403 } else {
1404 return;
1405 }
1406 }
1407
1408 this->flushRenderTarget(glRT, rect);
1409 GrAutoTRestore<ScissorState> asr(&fScissorState);
1410 fScissorState.fEnabled = SkToBool(rect);
1411 if (fScissorState.fEnabled) {
1412 fScissorState.fRect = *rect;
1413 }
1414 this->flushScissor(glRT->getViewport(), glRT->origin());
1415
1416 GrGLfloat r, g, b, a;
1417 static const GrGLfloat scale255 = 1.f / 255.f;
1418 a = GrColorUnpackA(color) * scale255;
1419 GrGLfloat scaleRGB = scale255;
1420 r = GrColorUnpackR(color) * scaleRGB;
1421 g = GrColorUnpackG(color) * scaleRGB;
1422 b = GrColorUnpackB(color) * scaleRGB;
1423
1424 GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
1425 fHWWriteToColor = kYes_TriState;
1426 GL_CALL(ClearColor(r, g, b, a));
1427 GL_CALL(Clear(GR_GL_COLOR_BUFFER_BIT));
1428 }
1429
discard(GrRenderTarget * renderTarget)1430 void GrGpuGL::discard(GrRenderTarget* renderTarget) {
1431 if (!this->caps()->discardRenderTargetSupport()) {
1432 return;
1433 }
1434 if (NULL == renderTarget) {
1435 renderTarget = this->drawState()->getRenderTarget();
1436 if (NULL == renderTarget) {
1437 return;
1438 }
1439 }
1440
1441 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(renderTarget);
1442 if (renderTarget->getUniqueID() != fHWBoundRenderTargetUniqueID) {
1443 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1444 fGPUStats.incRenderTargetBinds();
1445 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, glRT->renderFBOID()));
1446 }
1447 switch (this->glCaps().invalidateFBType()) {
1448 case GrGLCaps::kNone_InvalidateFBType:
1449 SkFAIL("Should never get here.");
1450 break;
1451 case GrGLCaps::kInvalidate_InvalidateFBType:
1452 if (0 == glRT->renderFBOID()) {
1453 // When rendering to the default framebuffer the legal values for attachments
1454 // are GL_COLOR, GL_DEPTH, GL_STENCIL, ... rather than the various FBO attachment
1455 // types.
1456 static const GrGLenum attachments[] = { GR_GL_COLOR };
1457 GL_CALL(InvalidateFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1458 attachments));
1459 } else {
1460 static const GrGLenum attachments[] = { GR_GL_COLOR_ATTACHMENT0 };
1461 GL_CALL(InvalidateFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1462 attachments));
1463 }
1464 break;
1465 case GrGLCaps::kDiscard_InvalidateFBType: {
1466 if (0 == glRT->renderFBOID()) {
1467 // When rendering to the default framebuffer the legal values for attachments
1468 // are GL_COLOR, GL_DEPTH, GL_STENCIL, ... rather than the various FBO attachment
1469 // types. See glDiscardFramebuffer() spec.
1470 static const GrGLenum attachments[] = { GR_GL_COLOR };
1471 GL_CALL(DiscardFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1472 attachments));
1473 } else {
1474 static const GrGLenum attachments[] = { GR_GL_COLOR_ATTACHMENT0 };
1475 GL_CALL(DiscardFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1476 attachments));
1477 }
1478 break;
1479 }
1480 }
1481 renderTarget->flagAsResolved();
1482 }
1483
1484
clearStencil(GrRenderTarget * target)1485 void GrGpuGL::clearStencil(GrRenderTarget* target) {
1486 if (NULL == target) {
1487 return;
1488 }
1489 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(target);
1490 this->flushRenderTarget(glRT, &SkIRect::EmptyIRect());
1491
1492 GrAutoTRestore<ScissorState> asr(&fScissorState);
1493 fScissorState.fEnabled = false;
1494 this->flushScissor(glRT->getViewport(), glRT->origin());
1495
1496 GL_CALL(StencilMask(0xffffffff));
1497 GL_CALL(ClearStencil(0));
1498 GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
1499 fHWStencilSettings.invalidate();
1500 }
1501
clearStencilClip(GrRenderTarget * target,const SkIRect & rect,bool insideClip)1502 void GrGpuGL::clearStencilClip(GrRenderTarget* target, const SkIRect& rect, bool insideClip) {
1503 SkASSERT(target);
1504
1505 // this should only be called internally when we know we have a
1506 // stencil buffer.
1507 SkASSERT(target->getStencilBuffer());
1508 GrGLint stencilBitCount = target->getStencilBuffer()->bits();
1509 #if 0
1510 SkASSERT(stencilBitCount > 0);
1511 GrGLint clipStencilMask = (1 << (stencilBitCount - 1));
1512 #else
1513 // we could just clear the clip bit but when we go through
1514 // ANGLE a partial stencil mask will cause clears to be
1515 // turned into draws. Our contract on GrDrawTarget says that
1516 // changing the clip between stencil passes may or may not
1517 // zero the client's clip bits. So we just clear the whole thing.
1518 static const GrGLint clipStencilMask = ~0;
1519 #endif
1520 GrGLint value;
1521 if (insideClip) {
1522 value = (1 << (stencilBitCount - 1));
1523 } else {
1524 value = 0;
1525 }
1526 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(target);
1527 this->flushRenderTarget(glRT, &SkIRect::EmptyIRect());
1528
1529 GrAutoTRestore<ScissorState> asr(&fScissorState);
1530 fScissorState.fEnabled = true;
1531 fScissorState.fRect = rect;
1532 this->flushScissor(glRT->getViewport(), glRT->origin());
1533
1534 GL_CALL(StencilMask((uint32_t) clipStencilMask));
1535 GL_CALL(ClearStencil(value));
1536 GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
1537 fHWStencilSettings.invalidate();
1538 }
1539
readPixelsWillPayForYFlip(GrRenderTarget * renderTarget,int left,int top,int width,int height,GrPixelConfig config,size_t rowBytes) const1540 bool GrGpuGL::readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
1541 int left, int top,
1542 int width, int height,
1543 GrPixelConfig config,
1544 size_t rowBytes) const {
1545 // If this rendertarget is aready TopLeft, we don't need to flip.
1546 if (kTopLeft_GrSurfaceOrigin == renderTarget->origin()) {
1547 return false;
1548 }
1549
1550 // if GL can do the flip then we'll never pay for it.
1551 if (this->glCaps().packFlipYSupport()) {
1552 return false;
1553 }
1554
1555 // If we have to do memcpy to handle non-trim rowBytes then we
1556 // get the flip for free. Otherwise it costs.
1557 if (this->glCaps().packRowLengthSupport()) {
1558 return true;
1559 }
1560 // If we have to do memcpys to handle rowBytes then y-flip is free
1561 // Note the rowBytes might be tight to the passed in data, but if data
1562 // gets clipped in x to the target the rowBytes will no longer be tight.
1563 if (left >= 0 && (left + width) < renderTarget->width()) {
1564 return 0 == rowBytes ||
1565 GrBytesPerPixel(config) * width == rowBytes;
1566 } else {
1567 return false;
1568 }
1569 }
1570
onReadPixels(GrRenderTarget * target,int left,int top,int width,int height,GrPixelConfig config,void * buffer,size_t rowBytes)1571 bool GrGpuGL::onReadPixels(GrRenderTarget* target,
1572 int left, int top,
1573 int width, int height,
1574 GrPixelConfig config,
1575 void* buffer,
1576 size_t rowBytes) {
1577 // We cannot read pixels into a compressed buffer
1578 if (GrPixelConfigIsCompressed(config)) {
1579 return false;
1580 }
1581
1582 GrGLenum format = 0;
1583 GrGLenum type = 0;
1584 bool flipY = kBottomLeft_GrSurfaceOrigin == target->origin();
1585 if (!this->configToGLFormats(config, false, NULL, &format, &type)) {
1586 return false;
1587 }
1588 size_t bpp = GrBytesPerPixel(config);
1589 if (!adjust_pixel_ops_params(target->width(), target->height(), bpp,
1590 &left, &top, &width, &height,
1591 const_cast<const void**>(&buffer),
1592 &rowBytes)) {
1593 return false;
1594 }
1595
1596 // resolve the render target if necessary
1597 GrGLRenderTarget* tgt = static_cast<GrGLRenderTarget*>(target);
1598 switch (tgt->getResolveType()) {
1599 case GrGLRenderTarget::kCantResolve_ResolveType:
1600 return false;
1601 case GrGLRenderTarget::kAutoResolves_ResolveType:
1602 this->flushRenderTarget(static_cast<GrGLRenderTarget*>(target),
1603 &SkIRect::EmptyIRect());
1604 break;
1605 case GrGLRenderTarget::kCanResolve_ResolveType:
1606 this->onResolveRenderTarget(tgt);
1607 // we don't track the state of the READ FBO ID.
1608 fGPUStats.incRenderTargetBinds();
1609 GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER,
1610 tgt->textureFBOID()));
1611 break;
1612 default:
1613 SkFAIL("Unknown resolve type");
1614 }
1615
1616 const GrGLIRect& glvp = tgt->getViewport();
1617
1618 // the read rect is viewport-relative
1619 GrGLIRect readRect;
1620 readRect.setRelativeTo(glvp, left, top, width, height, target->origin());
1621
1622 size_t tightRowBytes = bpp * width;
1623 if (0 == rowBytes) {
1624 rowBytes = tightRowBytes;
1625 }
1626 size_t readDstRowBytes = tightRowBytes;
1627 void* readDst = buffer;
1628
1629 // determine if GL can read using the passed rowBytes or if we need
1630 // a scratch buffer.
1631 GrAutoMalloc<32 * sizeof(GrColor)> scratch;
1632 if (rowBytes != tightRowBytes) {
1633 if (this->glCaps().packRowLengthSupport()) {
1634 SkASSERT(!(rowBytes % sizeof(GrColor)));
1635 GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH,
1636 static_cast<GrGLint>(rowBytes / sizeof(GrColor))));
1637 readDstRowBytes = rowBytes;
1638 } else {
1639 scratch.reset(tightRowBytes * height);
1640 readDst = scratch.get();
1641 }
1642 }
1643 if (flipY && this->glCaps().packFlipYSupport()) {
1644 GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 1));
1645 }
1646 GL_CALL(ReadPixels(readRect.fLeft, readRect.fBottom,
1647 readRect.fWidth, readRect.fHeight,
1648 format, type, readDst));
1649 if (readDstRowBytes != tightRowBytes) {
1650 SkASSERT(this->glCaps().packRowLengthSupport());
1651 GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
1652 }
1653 if (flipY && this->glCaps().packFlipYSupport()) {
1654 GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 0));
1655 flipY = false;
1656 }
1657
1658 // now reverse the order of the rows, since GL's are bottom-to-top, but our
1659 // API presents top-to-bottom. We must preserve the padding contents. Note
1660 // that the above readPixels did not overwrite the padding.
1661 if (readDst == buffer) {
1662 SkASSERT(rowBytes == readDstRowBytes);
1663 if (flipY) {
1664 scratch.reset(tightRowBytes);
1665 void* tmpRow = scratch.get();
1666 // flip y in-place by rows
1667 const int halfY = height >> 1;
1668 char* top = reinterpret_cast<char*>(buffer);
1669 char* bottom = top + (height - 1) * rowBytes;
1670 for (int y = 0; y < halfY; y++) {
1671 memcpy(tmpRow, top, tightRowBytes);
1672 memcpy(top, bottom, tightRowBytes);
1673 memcpy(bottom, tmpRow, tightRowBytes);
1674 top += rowBytes;
1675 bottom -= rowBytes;
1676 }
1677 }
1678 } else {
1679 SkASSERT(readDst != buffer); SkASSERT(rowBytes != tightRowBytes);
1680 // copy from readDst to buffer while flipping y
1681 // const int halfY = height >> 1;
1682 const char* src = reinterpret_cast<const char*>(readDst);
1683 char* dst = reinterpret_cast<char*>(buffer);
1684 if (flipY) {
1685 dst += (height-1) * rowBytes;
1686 }
1687 for (int y = 0; y < height; y++) {
1688 memcpy(dst, src, tightRowBytes);
1689 src += readDstRowBytes;
1690 if (!flipY) {
1691 dst += rowBytes;
1692 } else {
1693 dst -= rowBytes;
1694 }
1695 }
1696 }
1697 return true;
1698 }
1699
flushRenderTarget(GrGLRenderTarget * target,const SkIRect * bound)1700 void GrGpuGL::flushRenderTarget(GrGLRenderTarget* target, const SkIRect* bound) {
1701
1702 SkASSERT(target);
1703
1704 uint32_t rtID = target->getUniqueID();
1705 if (fHWBoundRenderTargetUniqueID != rtID) {
1706 fGPUStats.incRenderTargetBinds();
1707 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, target->renderFBOID()));
1708 #ifdef SK_DEBUG
1709 // don't do this check in Chromium -- this is causing
1710 // lots of repeated command buffer flushes when the compositor is
1711 // rendering with Ganesh, which is really slow; even too slow for
1712 // Debug mode.
1713 if (!this->glContext().isChromium()) {
1714 GrGLenum status;
1715 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
1716 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
1717 GrPrintf("GrGpuGL::flushRenderTarget glCheckFramebufferStatus %x\n", status);
1718 }
1719 }
1720 #endif
1721 fHWBoundRenderTargetUniqueID = rtID;
1722 const GrGLIRect& vp = target->getViewport();
1723 if (fHWViewport != vp) {
1724 vp.pushToGLViewport(this->glInterface());
1725 fHWViewport = vp;
1726 }
1727 }
1728 if (NULL == bound || !bound->isEmpty()) {
1729 target->flagAsNeedingResolve(bound);
1730 }
1731
1732 GrTexture *texture = target->asTexture();
1733 if (texture) {
1734 texture->impl()->dirtyMipMaps(true);
1735 }
1736 }
1737
1738 GrGLenum gPrimitiveType2GLMode[] = {
1739 GR_GL_TRIANGLES,
1740 GR_GL_TRIANGLE_STRIP,
1741 GR_GL_TRIANGLE_FAN,
1742 GR_GL_POINTS,
1743 GR_GL_LINES,
1744 GR_GL_LINE_STRIP
1745 };
1746
1747 #define SWAP_PER_DRAW 0
1748
1749 #if SWAP_PER_DRAW
1750 #if defined(SK_BUILD_FOR_MAC)
1751 #include <AGL/agl.h>
1752 #elif defined(SK_BUILD_FOR_WIN32)
1753 #include <gl/GL.h>
SwapBuf()1754 void SwapBuf() {
1755 DWORD procID = GetCurrentProcessId();
1756 HWND hwnd = GetTopWindow(GetDesktopWindow());
1757 while(hwnd) {
1758 DWORD wndProcID = 0;
1759 GetWindowThreadProcessId(hwnd, &wndProcID);
1760 if(wndProcID == procID) {
1761 SwapBuffers(GetDC(hwnd));
1762 }
1763 hwnd = GetNextWindow(hwnd, GW_HWNDNEXT);
1764 }
1765 }
1766 #endif
1767 #endif
1768
onGpuDraw(const DrawInfo & info)1769 void GrGpuGL::onGpuDraw(const DrawInfo& info) {
1770 size_t indexOffsetInBytes;
1771 this->setupGeometry(info, &indexOffsetInBytes);
1772
1773 SkASSERT((size_t)info.primitiveType() < SK_ARRAY_COUNT(gPrimitiveType2GLMode));
1774
1775 if (info.isIndexed()) {
1776 GrGLvoid* indices =
1777 reinterpret_cast<GrGLvoid*>(indexOffsetInBytes + sizeof(uint16_t) * info.startIndex());
1778 // info.startVertex() was accounted for by setupGeometry.
1779 GL_CALL(DrawElements(gPrimitiveType2GLMode[info.primitiveType()],
1780 info.indexCount(),
1781 GR_GL_UNSIGNED_SHORT,
1782 indices));
1783 } else {
1784 // Pass 0 for parameter first. We have to adjust glVertexAttribPointer() to account for
1785 // startVertex in the DrawElements case. So we always rely on setupGeometry to have
1786 // accounted for startVertex.
1787 GL_CALL(DrawArrays(gPrimitiveType2GLMode[info.primitiveType()], 0, info.vertexCount()));
1788 }
1789 #if SWAP_PER_DRAW
1790 glFlush();
1791 #if defined(SK_BUILD_FOR_MAC)
1792 aglSwapBuffers(aglGetCurrentContext());
1793 int set_a_break_pt_here = 9;
1794 aglSwapBuffers(aglGetCurrentContext());
1795 #elif defined(SK_BUILD_FOR_WIN32)
1796 SwapBuf();
1797 int set_a_break_pt_here = 9;
1798 SwapBuf();
1799 #endif
1800 #endif
1801 }
1802
onResolveRenderTarget(GrRenderTarget * target)1803 void GrGpuGL::onResolveRenderTarget(GrRenderTarget* target) {
1804 GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(target);
1805 if (rt->needsResolve()) {
1806 // Some extensions automatically resolves the texture when it is read.
1807 if (this->glCaps().usesMSAARenderBuffers()) {
1808 SkASSERT(rt->textureFBOID() != rt->renderFBOID());
1809 fGPUStats.incRenderTargetBinds();
1810 fGPUStats.incRenderTargetBinds();
1811 GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER, rt->renderFBOID()));
1812 GL_CALL(BindFramebuffer(GR_GL_DRAW_FRAMEBUFFER, rt->textureFBOID()));
1813 // make sure we go through flushRenderTarget() since we've modified
1814 // the bound DRAW FBO ID.
1815 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1816 const GrGLIRect& vp = rt->getViewport();
1817 const SkIRect dirtyRect = rt->getResolveRect();
1818 GrGLIRect r;
1819 r.setRelativeTo(vp, dirtyRect.fLeft, dirtyRect.fTop,
1820 dirtyRect.width(), dirtyRect.height(), target->origin());
1821
1822 GrAutoTRestore<ScissorState> asr;
1823 if (GrGLCaps::kES_Apple_MSFBOType == this->glCaps().msFBOType()) {
1824 // Apple's extension uses the scissor as the blit bounds.
1825 asr.reset(&fScissorState);
1826 fScissorState.fEnabled = true;
1827 fScissorState.fRect = dirtyRect;
1828 this->flushScissor(rt->getViewport(), rt->origin());
1829 GL_CALL(ResolveMultisampleFramebuffer());
1830 } else {
1831 int right = r.fLeft + r.fWidth;
1832 int top = r.fBottom + r.fHeight;
1833
1834 // BlitFrameBuffer respects the scissor, so disable it.
1835 asr.reset(&fScissorState);
1836 fScissorState.fEnabled = false;
1837 this->flushScissor(rt->getViewport(), rt->origin());
1838 GL_CALL(BlitFramebuffer(r.fLeft, r.fBottom, right, top,
1839 r.fLeft, r.fBottom, right, top,
1840 GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
1841 }
1842 }
1843 rt->flagAsResolved();
1844 }
1845 }
1846
1847 namespace {
1848
1849
gr_to_gl_stencil_op(GrStencilOp op)1850 GrGLenum gr_to_gl_stencil_op(GrStencilOp op) {
1851 static const GrGLenum gTable[] = {
1852 GR_GL_KEEP, // kKeep_StencilOp
1853 GR_GL_REPLACE, // kReplace_StencilOp
1854 GR_GL_INCR_WRAP, // kIncWrap_StencilOp
1855 GR_GL_INCR, // kIncClamp_StencilOp
1856 GR_GL_DECR_WRAP, // kDecWrap_StencilOp
1857 GR_GL_DECR, // kDecClamp_StencilOp
1858 GR_GL_ZERO, // kZero_StencilOp
1859 GR_GL_INVERT, // kInvert_StencilOp
1860 };
1861 GR_STATIC_ASSERT(SK_ARRAY_COUNT(gTable) == kStencilOpCount);
1862 GR_STATIC_ASSERT(0 == kKeep_StencilOp);
1863 GR_STATIC_ASSERT(1 == kReplace_StencilOp);
1864 GR_STATIC_ASSERT(2 == kIncWrap_StencilOp);
1865 GR_STATIC_ASSERT(3 == kIncClamp_StencilOp);
1866 GR_STATIC_ASSERT(4 == kDecWrap_StencilOp);
1867 GR_STATIC_ASSERT(5 == kDecClamp_StencilOp);
1868 GR_STATIC_ASSERT(6 == kZero_StencilOp);
1869 GR_STATIC_ASSERT(7 == kInvert_StencilOp);
1870 SkASSERT((unsigned) op < kStencilOpCount);
1871 return gTable[op];
1872 }
1873
set_gl_stencil(const GrGLInterface * gl,const GrStencilSettings & settings,GrGLenum glFace,GrStencilSettings::Face grFace)1874 void set_gl_stencil(const GrGLInterface* gl,
1875 const GrStencilSettings& settings,
1876 GrGLenum glFace,
1877 GrStencilSettings::Face grFace) {
1878 GrGLenum glFunc = GrToGLStencilFunc(settings.func(grFace));
1879 GrGLenum glFailOp = gr_to_gl_stencil_op(settings.failOp(grFace));
1880 GrGLenum glPassOp = gr_to_gl_stencil_op(settings.passOp(grFace));
1881
1882 GrGLint ref = settings.funcRef(grFace);
1883 GrGLint mask = settings.funcMask(grFace);
1884 GrGLint writeMask = settings.writeMask(grFace);
1885
1886 if (GR_GL_FRONT_AND_BACK == glFace) {
1887 // we call the combined func just in case separate stencil is not
1888 // supported.
1889 GR_GL_CALL(gl, StencilFunc(glFunc, ref, mask));
1890 GR_GL_CALL(gl, StencilMask(writeMask));
1891 GR_GL_CALL(gl, StencilOp(glFailOp, glPassOp, glPassOp));
1892 } else {
1893 GR_GL_CALL(gl, StencilFuncSeparate(glFace, glFunc, ref, mask));
1894 GR_GL_CALL(gl, StencilMaskSeparate(glFace, writeMask));
1895 GR_GL_CALL(gl, StencilOpSeparate(glFace, glFailOp, glPassOp, glPassOp));
1896 }
1897 }
1898 }
1899
flushStencil(DrawType type)1900 void GrGpuGL::flushStencil(DrawType type) {
1901 if (kStencilPath_DrawType != type && fHWStencilSettings != fStencilSettings) {
1902 if (fStencilSettings.isDisabled()) {
1903 if (kNo_TriState != fHWStencilTestEnabled) {
1904 GL_CALL(Disable(GR_GL_STENCIL_TEST));
1905 fHWStencilTestEnabled = kNo_TriState;
1906 }
1907 } else {
1908 if (kYes_TriState != fHWStencilTestEnabled) {
1909 GL_CALL(Enable(GR_GL_STENCIL_TEST));
1910 fHWStencilTestEnabled = kYes_TriState;
1911 }
1912 }
1913 if (!fStencilSettings.isDisabled()) {
1914 if (this->caps()->twoSidedStencilSupport()) {
1915 set_gl_stencil(this->glInterface(),
1916 fStencilSettings,
1917 GR_GL_FRONT,
1918 GrStencilSettings::kFront_Face);
1919 set_gl_stencil(this->glInterface(),
1920 fStencilSettings,
1921 GR_GL_BACK,
1922 GrStencilSettings::kBack_Face);
1923 } else {
1924 set_gl_stencil(this->glInterface(),
1925 fStencilSettings,
1926 GR_GL_FRONT_AND_BACK,
1927 GrStencilSettings::kFront_Face);
1928 }
1929 }
1930 fHWStencilSettings = fStencilSettings;
1931 }
1932 }
1933
flushAAState(const GrOptDrawState & optState,DrawType type)1934 void GrGpuGL::flushAAState(const GrOptDrawState& optState, DrawType type) {
1935 // At least some ATI linux drivers will render GL_LINES incorrectly when MSAA state is enabled but
1936 // the target is not multisampled. Single pixel wide lines are rendered thicker than 1 pixel wide.
1937 #if 0
1938 // Replace RT_HAS_MSAA with this definition once this driver bug is no longer a relevant concern
1939 #define RT_HAS_MSAA rt->isMultisampled()
1940 #else
1941 #define RT_HAS_MSAA (rt->isMultisampled() || kDrawLines_DrawType == type)
1942 #endif
1943
1944 const GrRenderTarget* rt = optState.getRenderTarget();
1945 if (kGL_GrGLStandard == this->glStandard()) {
1946 if (RT_HAS_MSAA) {
1947 // FIXME: GL_NV_pr doesn't seem to like MSAA disabled. The paths
1948 // convex hulls of each segment appear to get filled.
1949 bool enableMSAA = kStencilPath_DrawType == type ||
1950 optState.isHWAntialiasState();
1951 if (enableMSAA) {
1952 if (kYes_TriState != fMSAAEnabled) {
1953 GL_CALL(Enable(GR_GL_MULTISAMPLE));
1954 fMSAAEnabled = kYes_TriState;
1955 }
1956 } else {
1957 if (kNo_TriState != fMSAAEnabled) {
1958 GL_CALL(Disable(GR_GL_MULTISAMPLE));
1959 fMSAAEnabled = kNo_TriState;
1960 }
1961 }
1962 }
1963 }
1964 }
1965
flushBlend(const GrOptDrawState & optState,bool isLines,GrBlendCoeff srcCoeff,GrBlendCoeff dstCoeff)1966 void GrGpuGL::flushBlend(const GrOptDrawState& optState, bool isLines,
1967 GrBlendCoeff srcCoeff, GrBlendCoeff dstCoeff) {
1968 // Any optimization to disable blending should have already been applied and
1969 // tweaked the coeffs to (1, 0).
1970 bool blendOff = kOne_GrBlendCoeff == srcCoeff && kZero_GrBlendCoeff == dstCoeff;
1971 if (blendOff) {
1972 if (kNo_TriState != fHWBlendState.fEnabled) {
1973 GL_CALL(Disable(GR_GL_BLEND));
1974 fHWBlendState.fEnabled = kNo_TriState;
1975 }
1976 } else {
1977 if (kYes_TriState != fHWBlendState.fEnabled) {
1978 GL_CALL(Enable(GR_GL_BLEND));
1979 fHWBlendState.fEnabled = kYes_TriState;
1980 }
1981 if (fHWBlendState.fSrcCoeff != srcCoeff ||
1982 fHWBlendState.fDstCoeff != dstCoeff) {
1983 GL_CALL(BlendFunc(gXfermodeCoeff2Blend[srcCoeff],
1984 gXfermodeCoeff2Blend[dstCoeff]));
1985 fHWBlendState.fSrcCoeff = srcCoeff;
1986 fHWBlendState.fDstCoeff = dstCoeff;
1987 }
1988 GrColor blendConst = optState.getBlendConstant();
1989 if ((BlendCoeffReferencesConstant(srcCoeff) ||
1990 BlendCoeffReferencesConstant(dstCoeff)) &&
1991 (!fHWBlendState.fConstColorValid ||
1992 fHWBlendState.fConstColor != blendConst)) {
1993 GrGLfloat c[4];
1994 GrColorToRGBAFloat(blendConst, c);
1995 GL_CALL(BlendColor(c[0], c[1], c[2], c[3]));
1996 fHWBlendState.fConstColor = blendConst;
1997 fHWBlendState.fConstColorValid = true;
1998 }
1999 }
2000 }
2001
tile_to_gl_wrap(SkShader::TileMode tm)2002 static inline GrGLenum tile_to_gl_wrap(SkShader::TileMode tm) {
2003 static const GrGLenum gWrapModes[] = {
2004 GR_GL_CLAMP_TO_EDGE,
2005 GR_GL_REPEAT,
2006 GR_GL_MIRRORED_REPEAT
2007 };
2008 GR_STATIC_ASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gWrapModes));
2009 GR_STATIC_ASSERT(0 == SkShader::kClamp_TileMode);
2010 GR_STATIC_ASSERT(1 == SkShader::kRepeat_TileMode);
2011 GR_STATIC_ASSERT(2 == SkShader::kMirror_TileMode);
2012 return gWrapModes[tm];
2013 }
2014
bindTexture(int unitIdx,const GrTextureParams & params,GrGLTexture * texture)2015 void GrGpuGL::bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture) {
2016 SkASSERT(texture);
2017
2018 // If we created a rt/tex and rendered to it without using a texture and now we're texturing
2019 // from the rt it will still be the last bound texture, but it needs resolving. So keep this
2020 // out of the "last != next" check.
2021 GrGLRenderTarget* texRT = static_cast<GrGLRenderTarget*>(texture->asRenderTarget());
2022 if (texRT) {
2023 this->onResolveRenderTarget(texRT);
2024 }
2025
2026 uint32_t textureID = texture->getUniqueID();
2027 if (fHWBoundTextureUniqueIDs[unitIdx] != textureID) {
2028 this->setTextureUnit(unitIdx);
2029 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, texture->textureID()));
2030 fHWBoundTextureUniqueIDs[unitIdx] = textureID;
2031 }
2032
2033 ResetTimestamp timestamp;
2034 const GrGLTexture::TexParams& oldTexParams = texture->getCachedTexParams(×tamp);
2035 bool setAll = timestamp < this->getResetTimestamp();
2036 GrGLTexture::TexParams newTexParams;
2037
2038 static GrGLenum glMinFilterModes[] = {
2039 GR_GL_NEAREST,
2040 GR_GL_LINEAR,
2041 GR_GL_LINEAR_MIPMAP_LINEAR
2042 };
2043 static GrGLenum glMagFilterModes[] = {
2044 GR_GL_NEAREST,
2045 GR_GL_LINEAR,
2046 GR_GL_LINEAR
2047 };
2048 GrTextureParams::FilterMode filterMode = params.filterMode();
2049 if (!this->caps()->mipMapSupport() && GrTextureParams::kMipMap_FilterMode == filterMode) {
2050 filterMode = GrTextureParams::kBilerp_FilterMode;
2051 }
2052 newTexParams.fMinFilter = glMinFilterModes[filterMode];
2053 newTexParams.fMagFilter = glMagFilterModes[filterMode];
2054
2055 if (GrTextureParams::kMipMap_FilterMode == filterMode &&
2056 texture->mipMapsAreDirty() && !GrPixelConfigIsCompressed(texture->config())) {
2057 GL_CALL(GenerateMipmap(GR_GL_TEXTURE_2D));
2058 texture->dirtyMipMaps(false);
2059 }
2060
2061 newTexParams.fWrapS = tile_to_gl_wrap(params.getTileModeX());
2062 newTexParams.fWrapT = tile_to_gl_wrap(params.getTileModeY());
2063 memcpy(newTexParams.fSwizzleRGBA,
2064 GrGLShaderBuilder::GetTexParamSwizzle(texture->config(), this->glCaps()),
2065 sizeof(newTexParams.fSwizzleRGBA));
2066 if (setAll || newTexParams.fMagFilter != oldTexParams.fMagFilter) {
2067 this->setTextureUnit(unitIdx);
2068 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2069 GR_GL_TEXTURE_MAG_FILTER,
2070 newTexParams.fMagFilter));
2071 }
2072 if (setAll || newTexParams.fMinFilter != oldTexParams.fMinFilter) {
2073 this->setTextureUnit(unitIdx);
2074 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2075 GR_GL_TEXTURE_MIN_FILTER,
2076 newTexParams.fMinFilter));
2077 }
2078 if (setAll || newTexParams.fWrapS != oldTexParams.fWrapS) {
2079 this->setTextureUnit(unitIdx);
2080 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2081 GR_GL_TEXTURE_WRAP_S,
2082 newTexParams.fWrapS));
2083 }
2084 if (setAll || newTexParams.fWrapT != oldTexParams.fWrapT) {
2085 this->setTextureUnit(unitIdx);
2086 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2087 GR_GL_TEXTURE_WRAP_T,
2088 newTexParams.fWrapT));
2089 }
2090 if (this->glCaps().textureSwizzleSupport() &&
2091 (setAll || memcmp(newTexParams.fSwizzleRGBA,
2092 oldTexParams.fSwizzleRGBA,
2093 sizeof(newTexParams.fSwizzleRGBA)))) {
2094 this->setTextureUnit(unitIdx);
2095 if (this->glStandard() == kGLES_GrGLStandard) {
2096 // ES3 added swizzle support but not GL_TEXTURE_SWIZZLE_RGBA.
2097 const GrGLenum* swizzle = newTexParams.fSwizzleRGBA;
2098 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_R, swizzle[0]));
2099 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_G, swizzle[1]));
2100 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_B, swizzle[2]));
2101 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_A, swizzle[3]));
2102 } else {
2103 GR_STATIC_ASSERT(sizeof(newTexParams.fSwizzleRGBA[0]) == sizeof(GrGLint));
2104 const GrGLint* swizzle = reinterpret_cast<const GrGLint*>(newTexParams.fSwizzleRGBA);
2105 GL_CALL(TexParameteriv(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_RGBA, swizzle));
2106 }
2107 }
2108 texture->setCachedTexParams(newTexParams, this->getResetTimestamp());
2109 }
2110
flushMiscFixedFunctionState(const GrOptDrawState & optState)2111 void GrGpuGL::flushMiscFixedFunctionState(const GrOptDrawState& optState) {
2112 if (optState.isDitherState()) {
2113 if (kYes_TriState != fHWDitherEnabled) {
2114 GL_CALL(Enable(GR_GL_DITHER));
2115 fHWDitherEnabled = kYes_TriState;
2116 }
2117 } else {
2118 if (kNo_TriState != fHWDitherEnabled) {
2119 GL_CALL(Disable(GR_GL_DITHER));
2120 fHWDitherEnabled = kNo_TriState;
2121 }
2122 }
2123
2124 if (optState.isColorWriteDisabled()) {
2125 if (kNo_TriState != fHWWriteToColor) {
2126 GL_CALL(ColorMask(GR_GL_FALSE, GR_GL_FALSE,
2127 GR_GL_FALSE, GR_GL_FALSE));
2128 fHWWriteToColor = kNo_TriState;
2129 }
2130 } else {
2131 if (kYes_TriState != fHWWriteToColor) {
2132 GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
2133 fHWWriteToColor = kYes_TriState;
2134 }
2135 }
2136
2137 if (fHWDrawFace != optState.getDrawFace()) {
2138 switch (optState.getDrawFace()) {
2139 case GrDrawState::kCCW_DrawFace:
2140 GL_CALL(Enable(GR_GL_CULL_FACE));
2141 GL_CALL(CullFace(GR_GL_BACK));
2142 break;
2143 case GrDrawState::kCW_DrawFace:
2144 GL_CALL(Enable(GR_GL_CULL_FACE));
2145 GL_CALL(CullFace(GR_GL_FRONT));
2146 break;
2147 case GrDrawState::kBoth_DrawFace:
2148 GL_CALL(Disable(GR_GL_CULL_FACE));
2149 break;
2150 default:
2151 SkFAIL("Unknown draw face.");
2152 }
2153 fHWDrawFace = optState.getDrawFace();
2154 }
2155 }
2156
configToGLFormats(GrPixelConfig config,bool getSizedInternalFormat,GrGLenum * internalFormat,GrGLenum * externalFormat,GrGLenum * externalType)2157 bool GrGpuGL::configToGLFormats(GrPixelConfig config,
2158 bool getSizedInternalFormat,
2159 GrGLenum* internalFormat,
2160 GrGLenum* externalFormat,
2161 GrGLenum* externalType) {
2162 GrGLenum dontCare;
2163 if (NULL == internalFormat) {
2164 internalFormat = &dontCare;
2165 }
2166 if (NULL == externalFormat) {
2167 externalFormat = &dontCare;
2168 }
2169 if (NULL == externalType) {
2170 externalType = &dontCare;
2171 }
2172
2173 if(!this->glCaps().isConfigTexturable(config)) {
2174 return false;
2175 }
2176
2177 switch (config) {
2178 case kRGBA_8888_GrPixelConfig:
2179 *internalFormat = GR_GL_RGBA;
2180 *externalFormat = GR_GL_RGBA;
2181 if (getSizedInternalFormat) {
2182 *internalFormat = GR_GL_RGBA8;
2183 } else {
2184 *internalFormat = GR_GL_RGBA;
2185 }
2186 *externalType = GR_GL_UNSIGNED_BYTE;
2187 break;
2188 case kBGRA_8888_GrPixelConfig:
2189 if (this->glCaps().bgraIsInternalFormat()) {
2190 if (getSizedInternalFormat) {
2191 *internalFormat = GR_GL_BGRA8;
2192 } else {
2193 *internalFormat = GR_GL_BGRA;
2194 }
2195 } else {
2196 if (getSizedInternalFormat) {
2197 *internalFormat = GR_GL_RGBA8;
2198 } else {
2199 *internalFormat = GR_GL_RGBA;
2200 }
2201 }
2202 *externalFormat = GR_GL_BGRA;
2203 *externalType = GR_GL_UNSIGNED_BYTE;
2204 break;
2205 case kRGB_565_GrPixelConfig:
2206 *internalFormat = GR_GL_RGB;
2207 *externalFormat = GR_GL_RGB;
2208 if (getSizedInternalFormat) {
2209 if (this->glStandard() == kGL_GrGLStandard) {
2210 return false;
2211 } else {
2212 *internalFormat = GR_GL_RGB565;
2213 }
2214 } else {
2215 *internalFormat = GR_GL_RGB;
2216 }
2217 *externalType = GR_GL_UNSIGNED_SHORT_5_6_5;
2218 break;
2219 case kRGBA_4444_GrPixelConfig:
2220 *internalFormat = GR_GL_RGBA;
2221 *externalFormat = GR_GL_RGBA;
2222 if (getSizedInternalFormat) {
2223 *internalFormat = GR_GL_RGBA4;
2224 } else {
2225 *internalFormat = GR_GL_RGBA;
2226 }
2227 *externalType = GR_GL_UNSIGNED_SHORT_4_4_4_4;
2228 break;
2229 case kIndex_8_GrPixelConfig:
2230 // no sized/unsized internal format distinction here
2231 *internalFormat = GR_GL_PALETTE8_RGBA8;
2232 break;
2233 case kAlpha_8_GrPixelConfig:
2234 if (this->glCaps().textureRedSupport()) {
2235 *internalFormat = GR_GL_RED;
2236 *externalFormat = GR_GL_RED;
2237 if (getSizedInternalFormat) {
2238 *internalFormat = GR_GL_R8;
2239 } else {
2240 *internalFormat = GR_GL_RED;
2241 }
2242 *externalType = GR_GL_UNSIGNED_BYTE;
2243 } else {
2244 *internalFormat = GR_GL_ALPHA;
2245 *externalFormat = GR_GL_ALPHA;
2246 if (getSizedInternalFormat) {
2247 *internalFormat = GR_GL_ALPHA8;
2248 } else {
2249 *internalFormat = GR_GL_ALPHA;
2250 }
2251 *externalType = GR_GL_UNSIGNED_BYTE;
2252 }
2253 break;
2254 case kETC1_GrPixelConfig:
2255 *internalFormat = GR_GL_COMPRESSED_RGB8_ETC1;
2256 break;
2257 case kLATC_GrPixelConfig:
2258 switch(this->glCaps().latcAlias()) {
2259 case GrGLCaps::kLATC_LATCAlias:
2260 *internalFormat = GR_GL_COMPRESSED_LUMINANCE_LATC1;
2261 break;
2262 case GrGLCaps::kRGTC_LATCAlias:
2263 *internalFormat = GR_GL_COMPRESSED_RED_RGTC1;
2264 break;
2265 case GrGLCaps::k3DC_LATCAlias:
2266 *internalFormat = GR_GL_COMPRESSED_3DC_X;
2267 break;
2268 }
2269 break;
2270 case kR11_EAC_GrPixelConfig:
2271 *internalFormat = GR_GL_COMPRESSED_R11;
2272 break;
2273
2274 case kASTC_12x12_GrPixelConfig:
2275 *internalFormat = GR_GL_COMPRESSED_RGBA_ASTC_12x12;
2276 break;
2277
2278 case kRGBA_float_GrPixelConfig:
2279 *internalFormat = GR_GL_RGBA32F;
2280 *externalFormat = GR_GL_RGBA;
2281 *externalType = GR_GL_FLOAT;
2282 break;
2283
2284 default:
2285 return false;
2286 }
2287 return true;
2288 }
2289
setTextureUnit(int unit)2290 void GrGpuGL::setTextureUnit(int unit) {
2291 SkASSERT(unit >= 0 && unit < fHWBoundTextureUniqueIDs.count());
2292 if (unit != fHWActiveTextureUnitIdx) {
2293 GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + unit));
2294 fHWActiveTextureUnitIdx = unit;
2295 }
2296 }
2297
setScratchTextureUnit()2298 void GrGpuGL::setScratchTextureUnit() {
2299 // Bind the last texture unit since it is the least likely to be used by GrGLProgram.
2300 int lastUnitIdx = fHWBoundTextureUniqueIDs.count() - 1;
2301 if (lastUnitIdx != fHWActiveTextureUnitIdx) {
2302 GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + lastUnitIdx));
2303 fHWActiveTextureUnitIdx = lastUnitIdx;
2304 }
2305 // clear out the this field so that if a program does use this unit it will rebind the correct
2306 // texture.
2307 fHWBoundTextureUniqueIDs[lastUnitIdx] = SK_InvalidUniqueID;
2308 }
2309
2310 namespace {
2311 // Determines whether glBlitFramebuffer could be used between src and dst.
can_blit_framebuffer(const GrSurface * dst,const GrSurface * src,const GrGpuGL * gpu,bool * wouldNeedTempFBO=NULL)2312 inline bool can_blit_framebuffer(const GrSurface* dst,
2313 const GrSurface* src,
2314 const GrGpuGL* gpu,
2315 bool* wouldNeedTempFBO = NULL) {
2316 if (gpu->glCaps().isConfigRenderable(dst->config(), dst->desc().fSampleCnt > 0) &&
2317 gpu->glCaps().isConfigRenderable(src->config(), src->desc().fSampleCnt > 0) &&
2318 gpu->glCaps().usesMSAARenderBuffers()) {
2319 // ES3 doesn't allow framebuffer blits when the src has MSAA and the configs don't match
2320 // or the rects are not the same (not just the same size but have the same edges).
2321 if (GrGLCaps::kES_3_0_MSFBOType == gpu->glCaps().msFBOType() &&
2322 (src->desc().fSampleCnt > 0 || src->config() != dst->config())) {
2323 return false;
2324 }
2325 if (wouldNeedTempFBO) {
2326 *wouldNeedTempFBO = NULL == dst->asRenderTarget() || NULL == src->asRenderTarget();
2327 }
2328 return true;
2329 } else {
2330 return false;
2331 }
2332 }
2333
can_copy_texsubimage(const GrSurface * dst,const GrSurface * src,const GrGpuGL * gpu,bool * wouldNeedTempFBO=NULL)2334 inline bool can_copy_texsubimage(const GrSurface* dst,
2335 const GrSurface* src,
2336 const GrGpuGL* gpu,
2337 bool* wouldNeedTempFBO = NULL) {
2338 // Table 3.9 of the ES2 spec indicates the supported formats with CopyTexSubImage
2339 // and BGRA isn't in the spec. There doesn't appear to be any extension that adds it. Perhaps
2340 // many drivers would allow it to work, but ANGLE does not.
2341 if (kGLES_GrGLStandard == gpu->glStandard() && gpu->glCaps().bgraIsInternalFormat() &&
2342 (kBGRA_8888_GrPixelConfig == dst->config() || kBGRA_8888_GrPixelConfig == src->config())) {
2343 return false;
2344 }
2345 const GrGLRenderTarget* dstRT = static_cast<const GrGLRenderTarget*>(dst->asRenderTarget());
2346 // If dst is multisampled (and uses an extension where there is a separate MSAA renderbuffer)
2347 // then we don't want to copy to the texture but to the MSAA buffer.
2348 if (dstRT && dstRT->renderFBOID() != dstRT->textureFBOID()) {
2349 return false;
2350 }
2351 const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
2352 // If the src is multisampled (and uses an extension where there is a separate MSAA
2353 // renderbuffer) then it is an invalid operation to call CopyTexSubImage
2354 if (srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
2355 return false;
2356 }
2357 if (gpu->glCaps().isConfigRenderable(src->config(), src->desc().fSampleCnt > 0) &&
2358 dst->asTexture() &&
2359 dst->origin() == src->origin() &&
2360 !GrPixelConfigIsCompressed(src->config())) {
2361 if (wouldNeedTempFBO) {
2362 *wouldNeedTempFBO = NULL == src->asRenderTarget();
2363 }
2364 return true;
2365 } else {
2366 return false;
2367 }
2368 }
2369
2370 }
2371
2372 // If a temporary FBO was created, its non-zero ID is returned. The viewport that the copy rect is
2373 // relative to is output.
bindSurfaceAsFBO(GrSurface * surface,GrGLenum fboTarget,GrGLIRect * viewport)2374 GrGLuint GrGpuGL::bindSurfaceAsFBO(GrSurface* surface, GrGLenum fboTarget, GrGLIRect* viewport) {
2375 GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(surface->asRenderTarget());
2376 GrGLuint tempFBOID;
2377 if (NULL == rt) {
2378 SkASSERT(surface->asTexture());
2379 GrGLuint texID = static_cast<GrGLTexture*>(surface->asTexture())->textureID();
2380 GR_GL_CALL(this->glInterface(), GenFramebuffers(1, &tempFBOID));
2381 fGPUStats.incRenderTargetBinds();
2382 GR_GL_CALL(this->glInterface(), BindFramebuffer(fboTarget, tempFBOID));
2383 GR_GL_CALL(this->glInterface(), FramebufferTexture2D(fboTarget,
2384 GR_GL_COLOR_ATTACHMENT0,
2385 GR_GL_TEXTURE_2D,
2386 texID,
2387 0));
2388 viewport->fLeft = 0;
2389 viewport->fBottom = 0;
2390 viewport->fWidth = surface->width();
2391 viewport->fHeight = surface->height();
2392 } else {
2393 tempFBOID = 0;
2394 fGPUStats.incRenderTargetBinds();
2395 GR_GL_CALL(this->glInterface(), BindFramebuffer(fboTarget, rt->renderFBOID()));
2396 *viewport = rt->getViewport();
2397 }
2398 return tempFBOID;
2399 }
2400
initCopySurfaceDstDesc(const GrSurface * src,GrTextureDesc * desc)2401 void GrGpuGL::initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) {
2402 // Check for format issues with glCopyTexSubImage2D
2403 if (kGLES_GrGLStandard == this->glStandard() && this->glCaps().bgraIsInternalFormat() &&
2404 kBGRA_8888_GrPixelConfig == src->config()) {
2405 // glCopyTexSubImage2D doesn't work with this config. We'll want to make it a render target
2406 // in order to call glBlitFramebuffer or to copy to it by rendering.
2407 INHERITED::initCopySurfaceDstDesc(src, desc);
2408 return;
2409 } else if (NULL == src->asRenderTarget()) {
2410 // We don't want to have to create an FBO just to use glCopyTexSubImage2D. Let the base
2411 // class handle it by rendering.
2412 INHERITED::initCopySurfaceDstDesc(src, desc);
2413 return;
2414 }
2415
2416 const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
2417 if (srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
2418 // It's illegal to call CopyTexSubImage2D on a MSAA renderbuffer.
2419 INHERITED::initCopySurfaceDstDesc(src, desc);
2420 } else {
2421 desc->fConfig = src->config();
2422 desc->fOrigin = src->origin();
2423 desc->fFlags = kNone_GrTextureFlags;
2424 }
2425 }
2426
onCopySurface(GrSurface * dst,GrSurface * src,const SkIRect & srcRect,const SkIPoint & dstPoint)2427 bool GrGpuGL::onCopySurface(GrSurface* dst,
2428 GrSurface* src,
2429 const SkIRect& srcRect,
2430 const SkIPoint& dstPoint) {
2431 bool inheritedCouldCopy = INHERITED::onCanCopySurface(dst, src, srcRect, dstPoint);
2432 bool copied = false;
2433 bool wouldNeedTempFBO = false;
2434 if (can_copy_texsubimage(dst, src, this, &wouldNeedTempFBO) &&
2435 (!wouldNeedTempFBO || !inheritedCouldCopy)) {
2436 GrGLuint srcFBO;
2437 GrGLIRect srcVP;
2438 srcFBO = this->bindSurfaceAsFBO(src, GR_GL_FRAMEBUFFER, &srcVP);
2439 GrGLTexture* dstTex = static_cast<GrGLTexture*>(dst->asTexture());
2440 SkASSERT(dstTex);
2441 // We modified the bound FBO
2442 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
2443 GrGLIRect srcGLRect;
2444 srcGLRect.setRelativeTo(srcVP,
2445 srcRect.fLeft,
2446 srcRect.fTop,
2447 srcRect.width(),
2448 srcRect.height(),
2449 src->origin());
2450
2451 this->setScratchTextureUnit();
2452 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, dstTex->textureID()));
2453 GrGLint dstY;
2454 if (kBottomLeft_GrSurfaceOrigin == dst->origin()) {
2455 dstY = dst->height() - (dstPoint.fY + srcGLRect.fHeight);
2456 } else {
2457 dstY = dstPoint.fY;
2458 }
2459 GL_CALL(CopyTexSubImage2D(GR_GL_TEXTURE_2D, 0,
2460 dstPoint.fX, dstY,
2461 srcGLRect.fLeft, srcGLRect.fBottom,
2462 srcGLRect.fWidth, srcGLRect.fHeight));
2463 copied = true;
2464 if (srcFBO) {
2465 GL_CALL(DeleteFramebuffers(1, &srcFBO));
2466 }
2467 } else if (can_blit_framebuffer(dst, src, this, &wouldNeedTempFBO) &&
2468 (!wouldNeedTempFBO || !inheritedCouldCopy)) {
2469 SkIRect dstRect = SkIRect::MakeXYWH(dstPoint.fX, dstPoint.fY,
2470 srcRect.width(), srcRect.height());
2471 bool selfOverlap = false;
2472 if (dst->isSameAs(src)) {
2473 selfOverlap = SkIRect::IntersectsNoEmptyCheck(dstRect, srcRect);
2474 }
2475
2476 if (!selfOverlap) {
2477 GrGLuint dstFBO;
2478 GrGLuint srcFBO;
2479 GrGLIRect dstVP;
2480 GrGLIRect srcVP;
2481 dstFBO = this->bindSurfaceAsFBO(dst, GR_GL_DRAW_FRAMEBUFFER, &dstVP);
2482 srcFBO = this->bindSurfaceAsFBO(src, GR_GL_READ_FRAMEBUFFER, &srcVP);
2483 // We modified the bound FBO
2484 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
2485 GrGLIRect srcGLRect;
2486 GrGLIRect dstGLRect;
2487 srcGLRect.setRelativeTo(srcVP,
2488 srcRect.fLeft,
2489 srcRect.fTop,
2490 srcRect.width(),
2491 srcRect.height(),
2492 src->origin());
2493 dstGLRect.setRelativeTo(dstVP,
2494 dstRect.fLeft,
2495 dstRect.fTop,
2496 dstRect.width(),
2497 dstRect.height(),
2498 dst->origin());
2499
2500 GrAutoTRestore<ScissorState> asr;
2501 // BlitFrameBuffer respects the scissor, so disable it.
2502 asr.reset(&fScissorState);
2503 fScissorState.fEnabled = false;
2504 this->flushScissor(dstGLRect, dst->origin());
2505
2506 GrGLint srcY0;
2507 GrGLint srcY1;
2508 // Does the blit need to y-mirror or not?
2509 if (src->origin() == dst->origin()) {
2510 srcY0 = srcGLRect.fBottom;
2511 srcY1 = srcGLRect.fBottom + srcGLRect.fHeight;
2512 } else {
2513 srcY0 = srcGLRect.fBottom + srcGLRect.fHeight;
2514 srcY1 = srcGLRect.fBottom;
2515 }
2516 GL_CALL(BlitFramebuffer(srcGLRect.fLeft,
2517 srcY0,
2518 srcGLRect.fLeft + srcGLRect.fWidth,
2519 srcY1,
2520 dstGLRect.fLeft,
2521 dstGLRect.fBottom,
2522 dstGLRect.fLeft + dstGLRect.fWidth,
2523 dstGLRect.fBottom + dstGLRect.fHeight,
2524 GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
2525 if (dstFBO) {
2526 GL_CALL(DeleteFramebuffers(1, &dstFBO));
2527 }
2528 if (srcFBO) {
2529 GL_CALL(DeleteFramebuffers(1, &srcFBO));
2530 }
2531 copied = true;
2532 }
2533 }
2534 if (!copied && inheritedCouldCopy) {
2535 copied = INHERITED::onCopySurface(dst, src, srcRect, dstPoint);
2536 SkASSERT(copied);
2537 }
2538 return copied;
2539 }
2540
onCanCopySurface(GrSurface * dst,GrSurface * src,const SkIRect & srcRect,const SkIPoint & dstPoint)2541 bool GrGpuGL::onCanCopySurface(GrSurface* dst,
2542 GrSurface* src,
2543 const SkIRect& srcRect,
2544 const SkIPoint& dstPoint) {
2545 // This mirrors the logic in onCopySurface.
2546 if (can_copy_texsubimage(dst, src, this)) {
2547 return true;
2548 }
2549 if (can_blit_framebuffer(dst, src, this)) {
2550 if (dst->isSameAs(src)) {
2551 SkIRect dstRect = SkIRect::MakeXYWH(dstPoint.fX, dstPoint.fY,
2552 srcRect.width(), srcRect.height());
2553 if(!SkIRect::IntersectsNoEmptyCheck(dstRect, srcRect)) {
2554 return true;
2555 }
2556 } else {
2557 return true;
2558 }
2559 }
2560 return INHERITED::onCanCopySurface(dst, src, srcRect, dstPoint);
2561 }
2562
didAddGpuTraceMarker()2563 void GrGpuGL::didAddGpuTraceMarker() {
2564 if (this->caps()->gpuTracingSupport()) {
2565 const GrTraceMarkerSet& markerArray = this->getActiveTraceMarkers();
2566 SkString markerString = markerArray.toStringLast();
2567 GL_CALL(PushGroupMarker(0, markerString.c_str()));
2568 }
2569 }
2570
didRemoveGpuTraceMarker()2571 void GrGpuGL::didRemoveGpuTraceMarker() {
2572 if (this->caps()->gpuTracingSupport()) {
2573 GL_CALL(PopGroupMarker());
2574 }
2575 }
2576 ///////////////////////////////////////////////////////////////////////////////
2577
bindArrayAndBuffersToDraw(GrGpuGL * gpu,const GrGLVertexBuffer * vbuffer,const GrGLIndexBuffer * ibuffer)2578 GrGLAttribArrayState* GrGpuGL::HWGeometryState::bindArrayAndBuffersToDraw(
2579 GrGpuGL* gpu,
2580 const GrGLVertexBuffer* vbuffer,
2581 const GrGLIndexBuffer* ibuffer) {
2582 SkASSERT(vbuffer);
2583 GrGLAttribArrayState* attribState;
2584
2585 // We use a vertex array if we're on a core profile and the verts are in a VBO.
2586 if (gpu->glCaps().isCoreProfile() && !vbuffer->isCPUBacked()) {
2587 if (NULL == fVBOVertexArray || fVBOVertexArray->wasDestroyed()) {
2588 SkSafeUnref(fVBOVertexArray);
2589 GrGLuint arrayID;
2590 GR_GL_CALL(gpu->glInterface(), GenVertexArrays(1, &arrayID));
2591 int attrCount = gpu->glCaps().maxVertexAttributes();
2592 fVBOVertexArray = SkNEW_ARGS(GrGLVertexArray, (gpu, arrayID, attrCount));
2593 }
2594 attribState = fVBOVertexArray->bindWithIndexBuffer(ibuffer);
2595 } else {
2596 if (ibuffer) {
2597 this->setIndexBufferIDOnDefaultVertexArray(gpu, ibuffer->bufferID());
2598 } else {
2599 this->setVertexArrayID(gpu, 0);
2600 }
2601 int attrCount = gpu->glCaps().maxVertexAttributes();
2602 if (fDefaultVertexArrayAttribState.count() != attrCount) {
2603 fDefaultVertexArrayAttribState.resize(attrCount);
2604 }
2605 attribState = &fDefaultVertexArrayAttribState;
2606 }
2607 return attribState;
2608 }
2609