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 "GrGLGpu.h"
10 #include "GrGLStencilAttachment.h"
11 #include "GrGLTextureRenderTarget.h"
12 #include "GrGpuResourcePriv.h"
13 #include "GrPipeline.h"
14 #include "GrRenderTargetPriv.h"
15 #include "GrSurfacePriv.h"
16 #include "GrTemplates.h"
17 #include "GrTexturePriv.h"
18 #include "GrTypes.h"
19 #include "GrVertices.h"
20 #include "SkStrokeRec.h"
21 #include "SkTemplates.h"
22
23 #define GL_CALL(X) GR_GL_CALL(this->glInterface(), X)
24 #define GL_CALL_RET(RET, X) GR_GL_CALL_RET(this->glInterface(), RET, X)
25
26 #define SKIP_CACHE_CHECK true
27
28 #if GR_GL_CHECK_ALLOC_WITH_GET_ERROR
29 #define CLEAR_ERROR_BEFORE_ALLOC(iface) GrGLClearErr(iface)
30 #define GL_ALLOC_CALL(iface, call) GR_GL_CALL_NOERRCHECK(iface, call)
31 #define CHECK_ALLOC_ERROR(iface) GR_GL_GET_ERROR(iface)
32 #else
33 #define CLEAR_ERROR_BEFORE_ALLOC(iface)
34 #define GL_ALLOC_CALL(iface, call) GR_GL_CALL(iface, call)
35 #define CHECK_ALLOC_ERROR(iface) GR_GL_NO_ERROR
36 #endif
37
38
39 ///////////////////////////////////////////////////////////////////////////////
40
41
42 static const GrGLenum gXfermodeEquation2Blend[] = {
43 // Basic OpenGL blend equations.
44 GR_GL_FUNC_ADD,
45 GR_GL_FUNC_SUBTRACT,
46 GR_GL_FUNC_REVERSE_SUBTRACT,
47
48 // GL_KHR_blend_equation_advanced.
49 GR_GL_SCREEN,
50 GR_GL_OVERLAY,
51 GR_GL_DARKEN,
52 GR_GL_LIGHTEN,
53 GR_GL_COLORDODGE,
54 GR_GL_COLORBURN,
55 GR_GL_HARDLIGHT,
56 GR_GL_SOFTLIGHT,
57 GR_GL_DIFFERENCE,
58 GR_GL_EXCLUSION,
59 GR_GL_MULTIPLY,
60 GR_GL_HSL_HUE,
61 GR_GL_HSL_SATURATION,
62 GR_GL_HSL_COLOR,
63 GR_GL_HSL_LUMINOSITY
64 };
65 GR_STATIC_ASSERT(0 == kAdd_GrBlendEquation);
66 GR_STATIC_ASSERT(1 == kSubtract_GrBlendEquation);
67 GR_STATIC_ASSERT(2 == kReverseSubtract_GrBlendEquation);
68 GR_STATIC_ASSERT(3 == kScreen_GrBlendEquation);
69 GR_STATIC_ASSERT(4 == kOverlay_GrBlendEquation);
70 GR_STATIC_ASSERT(5 == kDarken_GrBlendEquation);
71 GR_STATIC_ASSERT(6 == kLighten_GrBlendEquation);
72 GR_STATIC_ASSERT(7 == kColorDodge_GrBlendEquation);
73 GR_STATIC_ASSERT(8 == kColorBurn_GrBlendEquation);
74 GR_STATIC_ASSERT(9 == kHardLight_GrBlendEquation);
75 GR_STATIC_ASSERT(10 == kSoftLight_GrBlendEquation);
76 GR_STATIC_ASSERT(11 == kDifference_GrBlendEquation);
77 GR_STATIC_ASSERT(12 == kExclusion_GrBlendEquation);
78 GR_STATIC_ASSERT(13 == kMultiply_GrBlendEquation);
79 GR_STATIC_ASSERT(14 == kHSLHue_GrBlendEquation);
80 GR_STATIC_ASSERT(15 == kHSLSaturation_GrBlendEquation);
81 GR_STATIC_ASSERT(16 == kHSLColor_GrBlendEquation);
82 GR_STATIC_ASSERT(17 == kHSLLuminosity_GrBlendEquation);
83 GR_STATIC_ASSERT(SK_ARRAY_COUNT(gXfermodeEquation2Blend) == kGrBlendEquationCnt);
84
85 static const GrGLenum gXfermodeCoeff2Blend[] = {
86 GR_GL_ZERO,
87 GR_GL_ONE,
88 GR_GL_SRC_COLOR,
89 GR_GL_ONE_MINUS_SRC_COLOR,
90 GR_GL_DST_COLOR,
91 GR_GL_ONE_MINUS_DST_COLOR,
92 GR_GL_SRC_ALPHA,
93 GR_GL_ONE_MINUS_SRC_ALPHA,
94 GR_GL_DST_ALPHA,
95 GR_GL_ONE_MINUS_DST_ALPHA,
96 GR_GL_CONSTANT_COLOR,
97 GR_GL_ONE_MINUS_CONSTANT_COLOR,
98 GR_GL_CONSTANT_ALPHA,
99 GR_GL_ONE_MINUS_CONSTANT_ALPHA,
100
101 // extended blend coeffs
102 GR_GL_SRC1_COLOR,
103 GR_GL_ONE_MINUS_SRC1_COLOR,
104 GR_GL_SRC1_ALPHA,
105 GR_GL_ONE_MINUS_SRC1_ALPHA,
106 };
107
BlendCoeffReferencesConstant(GrBlendCoeff coeff)108 bool GrGLGpu::BlendCoeffReferencesConstant(GrBlendCoeff coeff) {
109 static const bool gCoeffReferencesBlendConst[] = {
110 false,
111 false,
112 false,
113 false,
114 false,
115 false,
116 false,
117 false,
118 false,
119 false,
120 true,
121 true,
122 true,
123 true,
124
125 // extended blend coeffs
126 false,
127 false,
128 false,
129 false,
130 };
131 return gCoeffReferencesBlendConst[coeff];
132 GR_STATIC_ASSERT(kGrBlendCoeffCnt == SK_ARRAY_COUNT(gCoeffReferencesBlendConst));
133
134 GR_STATIC_ASSERT(0 == kZero_GrBlendCoeff);
135 GR_STATIC_ASSERT(1 == kOne_GrBlendCoeff);
136 GR_STATIC_ASSERT(2 == kSC_GrBlendCoeff);
137 GR_STATIC_ASSERT(3 == kISC_GrBlendCoeff);
138 GR_STATIC_ASSERT(4 == kDC_GrBlendCoeff);
139 GR_STATIC_ASSERT(5 == kIDC_GrBlendCoeff);
140 GR_STATIC_ASSERT(6 == kSA_GrBlendCoeff);
141 GR_STATIC_ASSERT(7 == kISA_GrBlendCoeff);
142 GR_STATIC_ASSERT(8 == kDA_GrBlendCoeff);
143 GR_STATIC_ASSERT(9 == kIDA_GrBlendCoeff);
144 GR_STATIC_ASSERT(10 == kConstC_GrBlendCoeff);
145 GR_STATIC_ASSERT(11 == kIConstC_GrBlendCoeff);
146 GR_STATIC_ASSERT(12 == kConstA_GrBlendCoeff);
147 GR_STATIC_ASSERT(13 == kIConstA_GrBlendCoeff);
148
149 GR_STATIC_ASSERT(14 == kS2C_GrBlendCoeff);
150 GR_STATIC_ASSERT(15 == kIS2C_GrBlendCoeff);
151 GR_STATIC_ASSERT(16 == kS2A_GrBlendCoeff);
152 GR_STATIC_ASSERT(17 == kIS2A_GrBlendCoeff);
153
154 // assertion for gXfermodeCoeff2Blend have to be in GrGpu scope
155 GR_STATIC_ASSERT(kGrBlendCoeffCnt == SK_ARRAY_COUNT(gXfermodeCoeff2Blend));
156 }
157
158 ///////////////////////////////////////////////////////////////////////////////
159
160 static bool gPrintStartupSpew;
161
GrGLGpu(const GrGLContext & ctx,GrContext * context)162 GrGLGpu::GrGLGpu(const GrGLContext& ctx, GrContext* context)
163 : GrGpu(context)
164 , fGLContext(ctx) {
165
166 SkASSERT(ctx.isInitialized());
167 fCaps.reset(SkRef(ctx.caps()));
168
169 fHWBoundTextureUniqueIDs.reset(this->glCaps().maxFragmentTextureUnits());
170
171 GrGLClearErr(fGLContext.interface());
172 if (gPrintStartupSpew) {
173 const GrGLubyte* vendor;
174 const GrGLubyte* renderer;
175 const GrGLubyte* version;
176 GL_CALL_RET(vendor, GetString(GR_GL_VENDOR));
177 GL_CALL_RET(renderer, GetString(GR_GL_RENDERER));
178 GL_CALL_RET(version, GetString(GR_GL_VERSION));
179 SkDebugf("------------------------- create GrGLGpu %p --------------\n",
180 this);
181 SkDebugf("------ VENDOR %s\n", vendor);
182 SkDebugf("------ RENDERER %s\n", renderer);
183 SkDebugf("------ VERSION %s\n", version);
184 SkDebugf("------ EXTENSIONS\n");
185 ctx.extensions().print();
186 SkDebugf("\n");
187 SkDebugf("%s", this->glCaps().dump().c_str());
188 }
189
190 fProgramCache = SkNEW_ARGS(ProgramCache, (this));
191
192 SkASSERT(this->glCaps().maxVertexAttributes() >= GrGeometryProcessor::kMaxVertexAttribs);
193
194 fLastSuccessfulStencilFmtIdx = 0;
195 fHWProgramID = 0;
196 fTempSrcFBOID = 0;
197 fTempDstFBOID = 0;
198 fStencilClearFBOID = 0;
199
200 if (this->glCaps().shaderCaps()->pathRenderingSupport()) {
201 fPathRendering.reset(new GrGLPathRendering(this));
202 }
203 }
204
~GrGLGpu()205 GrGLGpu::~GrGLGpu() {
206 if (0 != fHWProgramID) {
207 // detach the current program so there is no confusion on OpenGL's part
208 // that we want it to be deleted
209 SkASSERT(fHWProgramID == fCurrentProgram->programID());
210 GL_CALL(UseProgram(0));
211 }
212
213 if (0 != fTempSrcFBOID) {
214 GL_CALL(DeleteFramebuffers(1, &fTempSrcFBOID));
215 }
216 if (0 != fTempDstFBOID) {
217 GL_CALL(DeleteFramebuffers(1, &fTempDstFBOID));
218 }
219 if (0 != fStencilClearFBOID) {
220 GL_CALL(DeleteFramebuffers(1, &fStencilClearFBOID));
221 }
222
223 delete fProgramCache;
224 }
225
contextAbandoned()226 void GrGLGpu::contextAbandoned() {
227 INHERITED::contextAbandoned();
228 fProgramCache->abandon();
229 fHWProgramID = 0;
230 fTempSrcFBOID = 0;
231 fTempDstFBOID = 0;
232 fStencilClearFBOID = 0;
233 if (this->glCaps().shaderCaps()->pathRenderingSupport()) {
234 this->glPathRendering()->abandonGpuResources();
235 }
236 }
237
238 ///////////////////////////////////////////////////////////////////////////////
preferredReadPixelsConfig(GrPixelConfig readConfig,GrPixelConfig surfaceConfig) const239 GrPixelConfig GrGLGpu::preferredReadPixelsConfig(GrPixelConfig readConfig,
240 GrPixelConfig surfaceConfig) const {
241 if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && kRGBA_8888_GrPixelConfig == readConfig) {
242 return kBGRA_8888_GrPixelConfig;
243 } else if (this->glContext().isMesa() &&
244 GrBytesPerPixel(readConfig) == 4 &&
245 GrPixelConfigSwapRAndB(readConfig) == surfaceConfig) {
246 // Mesa 3D takes a slow path on when reading back BGRA from an RGBA surface and vice-versa.
247 // Perhaps this should be guarded by some compiletime or runtime check.
248 return surfaceConfig;
249 } else if (readConfig == kBGRA_8888_GrPixelConfig
250 && !this->glCaps().readPixelsSupported(
251 this->glInterface(),
252 GR_GL_BGRA,
253 GR_GL_UNSIGNED_BYTE,
254 surfaceConfig
255 )) {
256 return kRGBA_8888_GrPixelConfig;
257 } else {
258 return readConfig;
259 }
260 }
261
preferredWritePixelsConfig(GrPixelConfig writeConfig,GrPixelConfig surfaceConfig) const262 GrPixelConfig GrGLGpu::preferredWritePixelsConfig(GrPixelConfig writeConfig,
263 GrPixelConfig surfaceConfig) const {
264 if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && kRGBA_8888_GrPixelConfig == writeConfig) {
265 return kBGRA_8888_GrPixelConfig;
266 } else {
267 return writeConfig;
268 }
269 }
270
canWriteTexturePixels(const GrTexture * texture,GrPixelConfig srcConfig) const271 bool GrGLGpu::canWriteTexturePixels(const GrTexture* texture, GrPixelConfig srcConfig) const {
272 if (kIndex_8_GrPixelConfig == srcConfig || kIndex_8_GrPixelConfig == texture->config()) {
273 return false;
274 }
275 if (srcConfig != texture->config() && kGLES_GrGLStandard == this->glStandard()) {
276 // In general ES2 requires the internal format of the texture and the format of the src
277 // pixels to match. However, It may or may not be possible to upload BGRA data to a RGBA
278 // texture. It depends upon which extension added BGRA. The Apple extension allows it
279 // (BGRA's internal format is RGBA) while the EXT extension does not (BGRA is its own
280 // internal format).
281 if (this->glCaps().isConfigTexturable(kBGRA_8888_GrPixelConfig) &&
282 !this->glCaps().bgraIsInternalFormat() &&
283 kBGRA_8888_GrPixelConfig == srcConfig &&
284 kRGBA_8888_GrPixelConfig == texture->config()) {
285 return true;
286 } else {
287 return false;
288 }
289 } else {
290 return true;
291 }
292 }
293
fullReadPixelsIsFasterThanPartial() const294 bool GrGLGpu::fullReadPixelsIsFasterThanPartial() const {
295 return SkToBool(GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL);
296 }
297
onResetContext(uint32_t resetBits)298 void GrGLGpu::onResetContext(uint32_t resetBits) {
299 // we don't use the zb at all
300 if (resetBits & kMisc_GrGLBackendState) {
301 GL_CALL(Disable(GR_GL_DEPTH_TEST));
302 GL_CALL(DepthMask(GR_GL_FALSE));
303
304 fHWDrawFace = GrPipelineBuilder::kInvalid_DrawFace;
305 fHWDitherEnabled = kUnknown_TriState;
306
307 if (kGL_GrGLStandard == this->glStandard()) {
308 // Desktop-only state that we never change
309 if (!this->glCaps().isCoreProfile()) {
310 GL_CALL(Disable(GR_GL_POINT_SMOOTH));
311 GL_CALL(Disable(GR_GL_LINE_SMOOTH));
312 GL_CALL(Disable(GR_GL_POLYGON_SMOOTH));
313 GL_CALL(Disable(GR_GL_POLYGON_STIPPLE));
314 GL_CALL(Disable(GR_GL_COLOR_LOGIC_OP));
315 GL_CALL(Disable(GR_GL_INDEX_LOGIC_OP));
316 }
317 // The windows NVIDIA driver has GL_ARB_imaging in the extension string when using a
318 // core profile. This seems like a bug since the core spec removes any mention of
319 // GL_ARB_imaging.
320 if (this->glCaps().imagingSupport() && !this->glCaps().isCoreProfile()) {
321 GL_CALL(Disable(GR_GL_COLOR_TABLE));
322 }
323 GL_CALL(Disable(GR_GL_POLYGON_OFFSET_FILL));
324 // Since ES doesn't support glPointSize at all we always use the VS to
325 // set the point size
326 GL_CALL(Enable(GR_GL_VERTEX_PROGRAM_POINT_SIZE));
327
328 // We should set glPolygonMode(FRONT_AND_BACK,FILL) here, too. It isn't
329 // currently part of our gl interface. There are probably others as
330 // well.
331 }
332
333 if (kGLES_GrGLStandard == this->glStandard() &&
334 fGLContext.hasExtension("GL_ARM_shader_framebuffer_fetch")) {
335 // The arm extension requires specifically enabling MSAA fetching per sample.
336 // On some devices this may have a perf hit. Also multiple render targets are disabled
337 GL_CALL(Enable(GR_GL_FETCH_PER_SAMPLE_ARM));
338 }
339 fHWWriteToColor = kUnknown_TriState;
340 // we only ever use lines in hairline mode
341 GL_CALL(LineWidth(1));
342 }
343
344 if (resetBits & kMSAAEnable_GrGLBackendState) {
345 fMSAAEnabled = kUnknown_TriState;
346 }
347
348 fHWActiveTextureUnitIdx = -1; // invalid
349
350 if (resetBits & kTextureBinding_GrGLBackendState) {
351 for (int s = 0; s < fHWBoundTextureUniqueIDs.count(); ++s) {
352 fHWBoundTextureUniqueIDs[s] = SK_InvalidUniqueID;
353 }
354 }
355
356 if (resetBits & kBlend_GrGLBackendState) {
357 fHWBlendState.invalidate();
358 }
359
360 if (resetBits & kView_GrGLBackendState) {
361 fHWScissorSettings.invalidate();
362 fHWViewport.invalidate();
363 }
364
365 if (resetBits & kStencil_GrGLBackendState) {
366 fHWStencilSettings.invalidate();
367 fHWStencilTestEnabled = kUnknown_TriState;
368 }
369
370 // Vertex
371 if (resetBits & kVertex_GrGLBackendState) {
372 fHWGeometryState.invalidate();
373 }
374
375 if (resetBits & kRenderTarget_GrGLBackendState) {
376 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
377 }
378
379 if (resetBits & kPathRendering_GrGLBackendState) {
380 if (this->caps()->shaderCaps()->pathRenderingSupport()) {
381 this->glPathRendering()->resetContext();
382 }
383 }
384
385 // we assume these values
386 if (resetBits & kPixelStore_GrGLBackendState) {
387 if (this->glCaps().unpackRowLengthSupport()) {
388 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
389 }
390 if (this->glCaps().packRowLengthSupport()) {
391 GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
392 }
393 if (this->glCaps().unpackFlipYSupport()) {
394 GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
395 }
396 if (this->glCaps().packFlipYSupport()) {
397 GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, GR_GL_FALSE));
398 }
399 }
400
401 if (resetBits & kProgram_GrGLBackendState) {
402 fHWProgramID = 0;
403 }
404 }
405
resolve_origin(GrSurfaceOrigin origin,bool renderTarget)406 static GrSurfaceOrigin resolve_origin(GrSurfaceOrigin origin, bool renderTarget) {
407 // By default, GrRenderTargets are GL's normal orientation so that they
408 // can be drawn to by the outside world without the client having
409 // to render upside down.
410 if (kDefault_GrSurfaceOrigin == origin) {
411 return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
412 } else {
413 return origin;
414 }
415 }
416
onWrapBackendTexture(const GrBackendTextureDesc & desc)417 GrTexture* GrGLGpu::onWrapBackendTexture(const GrBackendTextureDesc& desc) {
418 if (!this->configToGLFormats(desc.fConfig, false, NULL, NULL, NULL)) {
419 return NULL;
420 }
421
422 if (0 == desc.fTextureHandle) {
423 return NULL;
424 }
425
426 int maxSize = this->caps()->maxTextureSize();
427 if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
428 return NULL;
429 }
430
431 GrGLTexture::IDDesc idDesc;
432 GrSurfaceDesc surfDesc;
433
434 idDesc.fTextureID = static_cast<GrGLuint>(desc.fTextureHandle);
435 idDesc.fLifeCycle = GrGpuResource::kWrapped_LifeCycle;
436
437 // next line relies on GrBackendTextureDesc's flags matching GrTexture's
438 surfDesc.fFlags = (GrSurfaceFlags) desc.fFlags;
439 surfDesc.fWidth = desc.fWidth;
440 surfDesc.fHeight = desc.fHeight;
441 surfDesc.fConfig = desc.fConfig;
442 surfDesc.fSampleCnt = SkTMin(desc.fSampleCnt, this->caps()->maxSampleCount());
443 bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrBackendTextureFlag);
444 // FIXME: this should be calling resolve_origin(), but Chrome code is currently
445 // assuming the old behaviour, which is that backend textures are always
446 // BottomLeft, even for non-RT's. Once Chrome is fixed, change this to:
447 // glTexDesc.fOrigin = resolve_origin(desc.fOrigin, renderTarget);
448 if (kDefault_GrSurfaceOrigin == desc.fOrigin) {
449 surfDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
450 } else {
451 surfDesc.fOrigin = desc.fOrigin;
452 }
453
454 GrGLTexture* texture = NULL;
455 if (renderTarget) {
456 GrGLRenderTarget::IDDesc rtIDDesc;
457 if (!this->createRenderTargetObjects(surfDesc, GrGpuResource::kUncached_LifeCycle,
458 idDesc.fTextureID, &rtIDDesc)) {
459 return NULL;
460 }
461 texture = SkNEW_ARGS(GrGLTextureRenderTarget, (this, surfDesc, idDesc, rtIDDesc));
462 } else {
463 texture = SkNEW_ARGS(GrGLTexture, (this, surfDesc, idDesc));
464 }
465 if (NULL == texture) {
466 return NULL;
467 }
468
469 return texture;
470 }
471
onWrapBackendRenderTarget(const GrBackendRenderTargetDesc & wrapDesc)472 GrRenderTarget* GrGLGpu::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& wrapDesc) {
473 GrGLRenderTarget::IDDesc idDesc;
474 idDesc.fRTFBOID = static_cast<GrGLuint>(wrapDesc.fRenderTargetHandle);
475 idDesc.fMSColorRenderbufferID = 0;
476 idDesc.fTexFBOID = GrGLRenderTarget::kUnresolvableFBOID;
477 idDesc.fLifeCycle = GrGpuResource::kWrapped_LifeCycle;
478
479 GrSurfaceDesc desc;
480 desc.fConfig = wrapDesc.fConfig;
481 desc.fFlags = kCheckAllocation_GrSurfaceFlag;
482 desc.fWidth = wrapDesc.fWidth;
483 desc.fHeight = wrapDesc.fHeight;
484 desc.fSampleCnt = SkTMin(wrapDesc.fSampleCnt, this->caps()->maxSampleCount());
485 desc.fOrigin = resolve_origin(wrapDesc.fOrigin, true);
486
487 GrRenderTarget* tgt = SkNEW_ARGS(GrGLRenderTarget, (this, desc, idDesc));
488 if (wrapDesc.fStencilBits) {
489 GrGLStencilAttachment::IDDesc sbDesc;
490 GrGLStencilAttachment::Format format;
491 format.fInternalFormat = GrGLStencilAttachment::kUnknownInternalFormat;
492 format.fPacked = false;
493 format.fStencilBits = wrapDesc.fStencilBits;
494 format.fTotalBits = wrapDesc.fStencilBits;
495 GrGLStencilAttachment* sb = SkNEW_ARGS(GrGLStencilAttachment,
496 (this,
497 sbDesc,
498 desc.fWidth,
499 desc.fHeight,
500 desc.fSampleCnt,
501 format));
502 tgt->renderTargetPriv().didAttachStencilAttachment(sb);
503 sb->unref();
504 }
505 return tgt;
506 }
507
508 ////////////////////////////////////////////////////////////////////////////////
509
onWriteTexturePixels(GrTexture * texture,int left,int top,int width,int height,GrPixelConfig config,const void * buffer,size_t rowBytes)510 bool GrGLGpu::onWriteTexturePixels(GrTexture* texture,
511 int left, int top, int width, int height,
512 GrPixelConfig config, const void* buffer,
513 size_t rowBytes) {
514 if (NULL == buffer) {
515 return false;
516 }
517 GrGLTexture* glTex = static_cast<GrGLTexture*>(texture);
518
519 this->setScratchTextureUnit();
520 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTex->textureID()));
521
522 bool success = false;
523 if (GrPixelConfigIsCompressed(glTex->desc().fConfig)) {
524 // We check that config == desc.fConfig in GrGLGpu::canWriteTexturePixels()
525 SkASSERT(config == glTex->desc().fConfig);
526 success = this->uploadCompressedTexData(glTex->desc(), buffer, false, left, top, width,
527 height);
528 } else {
529 success = this->uploadTexData(glTex->desc(), false, left, top, width, height, config,
530 buffer, rowBytes);
531 }
532
533 if (success) {
534 texture->texturePriv().dirtyMipMaps(true);
535 return true;
536 }
537
538 return false;
539 }
540
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)541 static bool adjust_pixel_ops_params(int surfaceWidth,
542 int surfaceHeight,
543 size_t bpp,
544 int* left, int* top, int* width, int* height,
545 const void** data,
546 size_t* rowBytes) {
547 if (!*rowBytes) {
548 *rowBytes = *width * bpp;
549 }
550
551 SkIRect subRect = SkIRect::MakeXYWH(*left, *top, *width, *height);
552 SkIRect bounds = SkIRect::MakeWH(surfaceWidth, surfaceHeight);
553
554 if (!subRect.intersect(bounds)) {
555 return false;
556 }
557 *data = reinterpret_cast<const void*>(reinterpret_cast<intptr_t>(*data) +
558 (subRect.fTop - *top) * *rowBytes + (subRect.fLeft - *left) * bpp);
559
560 *left = subRect.fLeft;
561 *top = subRect.fTop;
562 *width = subRect.width();
563 *height = subRect.height();
564 return true;
565 }
566
check_alloc_error(const GrSurfaceDesc & desc,const GrGLInterface * interface)567 static inline GrGLenum check_alloc_error(const GrSurfaceDesc& desc,
568 const GrGLInterface* interface) {
569 if (SkToBool(desc.fFlags & kCheckAllocation_GrSurfaceFlag)) {
570 return GR_GL_GET_ERROR(interface);
571 } else {
572 return CHECK_ALLOC_ERROR(interface);
573 }
574 }
575
uploadTexData(const GrSurfaceDesc & desc,bool isNewTexture,int left,int top,int width,int height,GrPixelConfig dataConfig,const void * data,size_t rowBytes)576 bool GrGLGpu::uploadTexData(const GrSurfaceDesc& desc,
577 bool isNewTexture,
578 int left, int top, int width, int height,
579 GrPixelConfig dataConfig,
580 const void* data,
581 size_t rowBytes) {
582 SkASSERT(data || isNewTexture);
583
584 // If we're uploading compressed data then we should be using uploadCompressedTexData
585 SkASSERT(!GrPixelConfigIsCompressed(dataConfig));
586
587 size_t bpp = GrBytesPerPixel(dataConfig);
588 if (!adjust_pixel_ops_params(desc.fWidth, desc.fHeight, bpp, &left, &top,
589 &width, &height, &data, &rowBytes)) {
590 return false;
591 }
592 size_t trimRowBytes = width * bpp;
593
594 // in case we need a temporary, trimmed copy of the src pixels
595 GrAutoMalloc<128 * 128> tempStorage;
596
597 // We currently lazily create MIPMAPs when the we see a draw with
598 // GrTextureParams::kMipMap_FilterMode. Using texture storage requires that the
599 // MIP levels are all created when the texture is created. So for now we don't use
600 // texture storage.
601 bool useTexStorage = false &&
602 isNewTexture &&
603 this->glCaps().texStorageSupport();
604
605 if (useTexStorage && kGL_GrGLStandard == this->glStandard()) {
606 // 565 is not a sized internal format on desktop GL. So on desktop with
607 // 565 we always use an unsized internal format to let the system pick
608 // the best sized format to convert the 565 data to. Since TexStorage
609 // only allows sized internal formats we will instead use TexImage2D.
610 useTexStorage = desc.fConfig != kRGB_565_GrPixelConfig;
611 }
612
613 GrGLenum internalFormat = 0x0; // suppress warning
614 GrGLenum externalFormat = 0x0; // suppress warning
615 GrGLenum externalType = 0x0; // suppress warning
616
617 // glTexStorage requires sized internal formats on both desktop and ES. ES2 requires an unsized
618 // format for glTexImage, unlike ES3 and desktop.
619 bool useSizedFormat = useTexStorage;
620 if (kGL_GrGLStandard == this->glStandard() ||
621 (this->glVersion() >= GR_GL_VER(3, 0) &&
622 // ES3 only works with sized BGRA8 format if "GL_APPLE_texture_format_BGRA8888" enabled
623 (kBGRA_8888_GrPixelConfig != dataConfig || !this->glCaps().bgraIsInternalFormat()))) {
624 useSizedFormat = true;
625 }
626
627 if (!this->configToGLFormats(dataConfig, useSizedFormat, &internalFormat,
628 &externalFormat, &externalType)) {
629 return false;
630 }
631
632 /*
633 * check whether to allocate a temporary buffer for flipping y or
634 * because our srcData has extra bytes past each row. If so, we need
635 * to trim those off here, since GL ES may not let us specify
636 * GL_UNPACK_ROW_LENGTH.
637 */
638 bool restoreGLRowLength = false;
639 bool swFlipY = false;
640 bool glFlipY = false;
641 if (data) {
642 if (kBottomLeft_GrSurfaceOrigin == desc.fOrigin) {
643 if (this->glCaps().unpackFlipYSupport()) {
644 glFlipY = true;
645 } else {
646 swFlipY = true;
647 }
648 }
649 if (this->glCaps().unpackRowLengthSupport() && !swFlipY) {
650 // can't use this for flipping, only non-neg values allowed. :(
651 if (rowBytes != trimRowBytes) {
652 GrGLint rowLength = static_cast<GrGLint>(rowBytes / bpp);
653 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, rowLength));
654 restoreGLRowLength = true;
655 }
656 } else {
657 if (trimRowBytes != rowBytes || swFlipY) {
658 // copy data into our new storage, skipping the trailing bytes
659 size_t trimSize = height * trimRowBytes;
660 const char* src = (const char*)data;
661 if (swFlipY) {
662 src += (height - 1) * rowBytes;
663 }
664 char* dst = (char*)tempStorage.reset(trimSize);
665 for (int y = 0; y < height; y++) {
666 memcpy(dst, src, trimRowBytes);
667 if (swFlipY) {
668 src -= rowBytes;
669 } else {
670 src += rowBytes;
671 }
672 dst += trimRowBytes;
673 }
674 // now point data to our copied version
675 data = tempStorage.get();
676 }
677 }
678 if (glFlipY) {
679 GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_TRUE));
680 }
681 GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT,
682 static_cast<GrGLint>(GrUnpackAlignment(dataConfig))));
683 }
684 bool succeeded = true;
685 if (isNewTexture &&
686 0 == left && 0 == top &&
687 desc.fWidth == width && desc.fHeight == height) {
688 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
689 if (useTexStorage) {
690 // We never resize or change formats of textures.
691 GL_ALLOC_CALL(this->glInterface(),
692 TexStorage2D(GR_GL_TEXTURE_2D,
693 1, // levels
694 internalFormat,
695 desc.fWidth, desc.fHeight));
696 } else {
697 GL_ALLOC_CALL(this->glInterface(),
698 TexImage2D(GR_GL_TEXTURE_2D,
699 0, // level
700 internalFormat,
701 desc.fWidth, desc.fHeight,
702 0, // border
703 externalFormat, externalType,
704 data));
705 }
706 GrGLenum error = check_alloc_error(desc, this->glInterface());
707 if (error != GR_GL_NO_ERROR) {
708 succeeded = false;
709 } else {
710 // if we have data and we used TexStorage to create the texture, we
711 // now upload with TexSubImage.
712 if (data && useTexStorage) {
713 GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
714 0, // level
715 left, top,
716 width, height,
717 externalFormat, externalType,
718 data));
719 }
720 }
721 } else {
722 if (swFlipY || glFlipY) {
723 top = desc.fHeight - (top + height);
724 }
725 GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
726 0, // level
727 left, top,
728 width, height,
729 externalFormat, externalType, data));
730 }
731
732 if (restoreGLRowLength) {
733 SkASSERT(this->glCaps().unpackRowLengthSupport());
734 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
735 }
736 if (glFlipY) {
737 GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
738 }
739 return succeeded;
740 }
741
742 // TODO: This function is using a lot of wonky semantics like, if width == -1
743 // then set width = desc.fWdith ... blah. A better way to do it might be to
744 // create a CompressedTexData struct that takes a desc/ptr and figures out
745 // the proper upload semantics. Then users can construct this function how they
746 // see fit if they want to go against the "standard" way to do it.
uploadCompressedTexData(const GrSurfaceDesc & desc,const void * data,bool isNewTexture,int left,int top,int width,int height)747 bool GrGLGpu::uploadCompressedTexData(const GrSurfaceDesc& desc,
748 const void* data,
749 bool isNewTexture,
750 int left, int top, int width, int height) {
751 SkASSERT(data || isNewTexture);
752
753 // No support for software flip y, yet...
754 SkASSERT(kBottomLeft_GrSurfaceOrigin != desc.fOrigin);
755
756 if (-1 == width) {
757 width = desc.fWidth;
758 }
759 #ifdef SK_DEBUG
760 else {
761 SkASSERT(width <= desc.fWidth);
762 }
763 #endif
764
765 if (-1 == height) {
766 height = desc.fHeight;
767 }
768 #ifdef SK_DEBUG
769 else {
770 SkASSERT(height <= desc.fHeight);
771 }
772 #endif
773
774 // Make sure that the width and height that we pass to OpenGL
775 // is a multiple of the block size.
776 size_t dataSize = GrCompressedFormatDataSize(desc.fConfig, width, height);
777
778 // We only need the internal format for compressed 2D textures.
779 GrGLenum internalFormat = 0;
780 if (!this->configToGLFormats(desc.fConfig, false, &internalFormat, NULL, NULL)) {
781 return false;
782 }
783
784 if (isNewTexture) {
785 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
786 GL_ALLOC_CALL(this->glInterface(),
787 CompressedTexImage2D(GR_GL_TEXTURE_2D,
788 0, // level
789 internalFormat,
790 width, height,
791 0, // border
792 SkToInt(dataSize),
793 data));
794 GrGLenum error = check_alloc_error(desc, this->glInterface());
795 if (error != GR_GL_NO_ERROR) {
796 return false;
797 }
798 } else {
799 // Paletted textures can't be updated.
800 if (GR_GL_PALETTE8_RGBA8 == internalFormat) {
801 return false;
802 }
803 GL_CALL(CompressedTexSubImage2D(GR_GL_TEXTURE_2D,
804 0, // level
805 left, top,
806 width, height,
807 internalFormat,
808 SkToInt(dataSize),
809 data));
810 }
811
812 return true;
813 }
814
renderbuffer_storage_msaa(GrGLContext & ctx,int sampleCount,GrGLenum format,int width,int height)815 static bool renderbuffer_storage_msaa(GrGLContext& ctx,
816 int sampleCount,
817 GrGLenum format,
818 int width, int height) {
819 CLEAR_ERROR_BEFORE_ALLOC(ctx.interface());
820 SkASSERT(GrGLCaps::kNone_MSFBOType != ctx.caps()->msFBOType());
821 switch (ctx.caps()->msFBOType()) {
822 case GrGLCaps::kDesktop_ARB_MSFBOType:
823 case GrGLCaps::kDesktop_EXT_MSFBOType:
824 case GrGLCaps::kES_3_0_MSFBOType:
825 GL_ALLOC_CALL(ctx.interface(),
826 RenderbufferStorageMultisample(GR_GL_RENDERBUFFER,
827 sampleCount,
828 format,
829 width, height));
830 break;
831 case GrGLCaps::kES_Apple_MSFBOType:
832 GL_ALLOC_CALL(ctx.interface(),
833 RenderbufferStorageMultisampleES2APPLE(GR_GL_RENDERBUFFER,
834 sampleCount,
835 format,
836 width, height));
837 break;
838 case GrGLCaps::kES_EXT_MsToTexture_MSFBOType:
839 case GrGLCaps::kES_IMG_MsToTexture_MSFBOType:
840 GL_ALLOC_CALL(ctx.interface(),
841 RenderbufferStorageMultisampleES2EXT(GR_GL_RENDERBUFFER,
842 sampleCount,
843 format,
844 width, height));
845 break;
846 case GrGLCaps::kNone_MSFBOType:
847 SkFAIL("Shouldn't be here if we don't support multisampled renderbuffers.");
848 break;
849 }
850 return (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctx.interface()));
851 }
852
createRenderTargetObjects(const GrSurfaceDesc & desc,GrGpuResource::LifeCycle lifeCycle,GrGLuint texID,GrGLRenderTarget::IDDesc * idDesc)853 bool GrGLGpu::createRenderTargetObjects(const GrSurfaceDesc& desc,
854 GrGpuResource::LifeCycle lifeCycle,
855 GrGLuint texID,
856 GrGLRenderTarget::IDDesc* idDesc) {
857 idDesc->fMSColorRenderbufferID = 0;
858 idDesc->fRTFBOID = 0;
859 idDesc->fTexFBOID = 0;
860 idDesc->fLifeCycle = lifeCycle;
861
862 GrGLenum status;
863
864 GrGLenum msColorFormat = 0; // suppress warning
865
866 if (desc.fSampleCnt > 0 && GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType()) {
867 goto FAILED;
868 }
869
870 GL_CALL(GenFramebuffers(1, &idDesc->fTexFBOID));
871 if (!idDesc->fTexFBOID) {
872 goto FAILED;
873 }
874
875
876 // If we are using multisampling we will create two FBOS. We render to one and then resolve to
877 // the texture bound to the other. The exception is the IMG multisample extension. With this
878 // extension the texture is multisampled when rendered to and then auto-resolves it when it is
879 // rendered from.
880 if (desc.fSampleCnt > 0 && this->glCaps().usesMSAARenderBuffers()) {
881 GL_CALL(GenFramebuffers(1, &idDesc->fRTFBOID));
882 GL_CALL(GenRenderbuffers(1, &idDesc->fMSColorRenderbufferID));
883 if (!idDesc->fRTFBOID ||
884 !idDesc->fMSColorRenderbufferID ||
885 !this->configToGLFormats(desc.fConfig,
886 // ES2 and ES3 require sized internal formats for rb storage.
887 kGLES_GrGLStandard == this->glStandard(),
888 &msColorFormat,
889 NULL,
890 NULL)) {
891 goto FAILED;
892 }
893 } else {
894 idDesc->fRTFBOID = idDesc->fTexFBOID;
895 }
896
897 // below here we may bind the FBO
898 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
899 if (idDesc->fRTFBOID != idDesc->fTexFBOID) {
900 SkASSERT(desc.fSampleCnt > 0);
901 GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, idDesc->fMSColorRenderbufferID));
902 if (!renderbuffer_storage_msaa(fGLContext,
903 desc.fSampleCnt,
904 msColorFormat,
905 desc.fWidth, desc.fHeight)) {
906 goto FAILED;
907 }
908 fStats.incRenderTargetBinds();
909 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, idDesc->fRTFBOID));
910 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
911 GR_GL_COLOR_ATTACHMENT0,
912 GR_GL_RENDERBUFFER,
913 idDesc->fMSColorRenderbufferID));
914 if ((desc.fFlags & kCheckAllocation_GrSurfaceFlag) ||
915 !this->glCaps().isConfigVerifiedColorAttachment(desc.fConfig)) {
916 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
917 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
918 goto FAILED;
919 }
920 fGLContext.caps()->markConfigAsValidColorAttachment(desc.fConfig);
921 }
922 }
923 fStats.incRenderTargetBinds();
924 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, idDesc->fTexFBOID));
925
926 if (this->glCaps().usesImplicitMSAAResolve() && desc.fSampleCnt > 0) {
927 GL_CALL(FramebufferTexture2DMultisample(GR_GL_FRAMEBUFFER,
928 GR_GL_COLOR_ATTACHMENT0,
929 GR_GL_TEXTURE_2D,
930 texID, 0, desc.fSampleCnt));
931 } else {
932 GL_CALL(FramebufferTexture2D(GR_GL_FRAMEBUFFER,
933 GR_GL_COLOR_ATTACHMENT0,
934 GR_GL_TEXTURE_2D,
935 texID, 0));
936 }
937 if ((desc.fFlags & kCheckAllocation_GrSurfaceFlag) ||
938 !this->glCaps().isConfigVerifiedColorAttachment(desc.fConfig)) {
939 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
940 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
941 goto FAILED;
942 }
943 fGLContext.caps()->markConfigAsValidColorAttachment(desc.fConfig);
944 }
945
946 return true;
947
948 FAILED:
949 if (idDesc->fMSColorRenderbufferID) {
950 GL_CALL(DeleteRenderbuffers(1, &idDesc->fMSColorRenderbufferID));
951 }
952 if (idDesc->fRTFBOID != idDesc->fTexFBOID) {
953 GL_CALL(DeleteFramebuffers(1, &idDesc->fRTFBOID));
954 }
955 if (idDesc->fTexFBOID) {
956 GL_CALL(DeleteFramebuffers(1, &idDesc->fTexFBOID));
957 }
958 return false;
959 }
960
961 // good to set a break-point here to know when createTexture fails
return_null_texture()962 static GrTexture* return_null_texture() {
963 // SkDEBUGFAIL("null texture");
964 return NULL;
965 }
966
967 #if 0 && defined(SK_DEBUG)
968 static size_t as_size_t(int x) {
969 return x;
970 }
971 #endif
972
onCreateTexture(const GrSurfaceDesc & desc,GrGpuResource::LifeCycle lifeCycle,const void * srcData,size_t rowBytes)973 GrTexture* GrGLGpu::onCreateTexture(const GrSurfaceDesc& desc,
974 GrGpuResource::LifeCycle lifeCycle,
975 const void* srcData, size_t rowBytes) {
976 // We fail if the MSAA was requested and is not available.
977 if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType() && desc.fSampleCnt) {
978 //SkDebugf("MSAA RT requested but not supported on this platform.");
979 return return_null_texture();
980 }
981
982 bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag);
983
984 GrGLTexture::IDDesc idDesc;
985 GL_CALL(GenTextures(1, &idDesc.fTextureID));
986 idDesc.fLifeCycle = lifeCycle;
987
988 if (!idDesc.fTextureID) {
989 return return_null_texture();
990 }
991
992 this->setScratchTextureUnit();
993 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, idDesc.fTextureID));
994
995 if (renderTarget && this->glCaps().textureUsageSupport()) {
996 // provides a hint about how this texture will be used
997 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
998 GR_GL_TEXTURE_USAGE,
999 GR_GL_FRAMEBUFFER_ATTACHMENT));
1000 }
1001
1002 // Some drivers like to know filter/wrap before seeing glTexImage2D. Some
1003 // drivers have a bug where an FBO won't be complete if it includes a
1004 // texture that is not mipmap complete (considering the filter in use).
1005 GrGLTexture::TexParams initialTexParams;
1006 // we only set a subset here so invalidate first
1007 initialTexParams.invalidate();
1008 initialTexParams.fMinFilter = GR_GL_NEAREST;
1009 initialTexParams.fMagFilter = GR_GL_NEAREST;
1010 initialTexParams.fWrapS = GR_GL_CLAMP_TO_EDGE;
1011 initialTexParams.fWrapT = GR_GL_CLAMP_TO_EDGE;
1012 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1013 GR_GL_TEXTURE_MAG_FILTER,
1014 initialTexParams.fMagFilter));
1015 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1016 GR_GL_TEXTURE_MIN_FILTER,
1017 initialTexParams.fMinFilter));
1018 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1019 GR_GL_TEXTURE_WRAP_S,
1020 initialTexParams.fWrapS));
1021 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1022 GR_GL_TEXTURE_WRAP_T,
1023 initialTexParams.fWrapT));
1024 if (!this->uploadTexData(desc, true, 0, 0,
1025 desc.fWidth, desc.fHeight,
1026 desc.fConfig, srcData, rowBytes)) {
1027 GL_CALL(DeleteTextures(1, &idDesc.fTextureID));
1028 return return_null_texture();
1029 }
1030
1031 GrGLTexture* tex;
1032 if (renderTarget) {
1033 // unbind the texture from the texture unit before binding it to the frame buffer
1034 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, 0));
1035 GrGLRenderTarget::IDDesc rtIDDesc;
1036
1037 if (!this->createRenderTargetObjects(desc, lifeCycle, idDesc.fTextureID, &rtIDDesc)) {
1038 GL_CALL(DeleteTextures(1, &idDesc.fTextureID));
1039 return return_null_texture();
1040 }
1041 tex = SkNEW_ARGS(GrGLTextureRenderTarget, (this, desc, idDesc, rtIDDesc));
1042 } else {
1043 tex = SkNEW_ARGS(GrGLTexture, (this, desc, idDesc));
1044 }
1045 tex->setCachedTexParams(initialTexParams, this->getResetTimestamp());
1046 #ifdef TRACE_TEXTURE_CREATION
1047 SkDebugf("--- new texture [%d] size=(%d %d) config=%d\n",
1048 glTexDesc.fTextureID, desc.fWidth, desc.fHeight, desc.fConfig);
1049 #endif
1050 return tex;
1051 }
1052
onCreateCompressedTexture(const GrSurfaceDesc & desc,GrGpuResource::LifeCycle lifeCycle,const void * srcData)1053 GrTexture* GrGLGpu::onCreateCompressedTexture(const GrSurfaceDesc& desc,
1054 GrGpuResource::LifeCycle lifeCycle,
1055 const void* srcData) {
1056 // Make sure that we're not flipping Y.
1057 if (kBottomLeft_GrSurfaceOrigin == desc.fOrigin) {
1058 return return_null_texture();
1059 }
1060
1061 GrGLTexture::IDDesc idDesc;
1062 GL_CALL(GenTextures(1, &idDesc.fTextureID));
1063 idDesc.fLifeCycle = lifeCycle;
1064
1065 if (!idDesc.fTextureID) {
1066 return return_null_texture();
1067 }
1068
1069 this->setScratchTextureUnit();
1070 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, idDesc.fTextureID));
1071
1072 // Some drivers like to know filter/wrap before seeing glTexImage2D. Some
1073 // drivers have a bug where an FBO won't be complete if it includes a
1074 // texture that is not mipmap complete (considering the filter in use).
1075 GrGLTexture::TexParams initialTexParams;
1076 // we only set a subset here so invalidate first
1077 initialTexParams.invalidate();
1078 initialTexParams.fMinFilter = GR_GL_NEAREST;
1079 initialTexParams.fMagFilter = GR_GL_NEAREST;
1080 initialTexParams.fWrapS = GR_GL_CLAMP_TO_EDGE;
1081 initialTexParams.fWrapT = GR_GL_CLAMP_TO_EDGE;
1082 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1083 GR_GL_TEXTURE_MAG_FILTER,
1084 initialTexParams.fMagFilter));
1085 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1086 GR_GL_TEXTURE_MIN_FILTER,
1087 initialTexParams.fMinFilter));
1088 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1089 GR_GL_TEXTURE_WRAP_S,
1090 initialTexParams.fWrapS));
1091 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
1092 GR_GL_TEXTURE_WRAP_T,
1093 initialTexParams.fWrapT));
1094
1095 if (!this->uploadCompressedTexData(desc, srcData)) {
1096 GL_CALL(DeleteTextures(1, &idDesc.fTextureID));
1097 return return_null_texture();
1098 }
1099
1100 GrGLTexture* tex;
1101 tex = SkNEW_ARGS(GrGLTexture, (this, desc, idDesc));
1102 tex->setCachedTexParams(initialTexParams, this->getResetTimestamp());
1103 #ifdef TRACE_TEXTURE_CREATION
1104 SkDebugf("--- new compressed texture [%d] size=(%d %d) config=%d\n",
1105 glTexDesc.fTextureID, desc.fWidth, desc.fHeight, desc.fConfig);
1106 #endif
1107 return tex;
1108 }
1109
1110 namespace {
1111
1112 const GrGLuint kUnknownBitCount = GrGLStencilAttachment::kUnknownBitCount;
1113
get_stencil_rb_sizes(const GrGLInterface * gl,GrGLStencilAttachment::Format * format)1114 void inline get_stencil_rb_sizes(const GrGLInterface* gl,
1115 GrGLStencilAttachment::Format* format) {
1116
1117 // we shouldn't ever know one size and not the other
1118 SkASSERT((kUnknownBitCount == format->fStencilBits) ==
1119 (kUnknownBitCount == format->fTotalBits));
1120 if (kUnknownBitCount == format->fStencilBits) {
1121 GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
1122 GR_GL_RENDERBUFFER_STENCIL_SIZE,
1123 (GrGLint*)&format->fStencilBits);
1124 if (format->fPacked) {
1125 GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
1126 GR_GL_RENDERBUFFER_DEPTH_SIZE,
1127 (GrGLint*)&format->fTotalBits);
1128 format->fTotalBits += format->fStencilBits;
1129 } else {
1130 format->fTotalBits = format->fStencilBits;
1131 }
1132 }
1133 }
1134 }
1135
createStencilAttachmentForRenderTarget(GrRenderTarget * rt,int width,int height)1136 bool GrGLGpu::createStencilAttachmentForRenderTarget(GrRenderTarget* rt, int width, int height) {
1137 // All internally created RTs are also textures. We don't create
1138 // SBs for a client's standalone RT (that is a RT that isn't also a texture).
1139 SkASSERT(rt->asTexture());
1140 SkASSERT(width >= rt->width());
1141 SkASSERT(height >= rt->height());
1142
1143 int samples = rt->numSamples();
1144 GrGLStencilAttachment::IDDesc sbDesc;
1145
1146 int stencilFmtCnt = this->glCaps().stencilFormats().count();
1147 for (int i = 0; i < stencilFmtCnt; ++i) {
1148 if (!sbDesc.fRenderbufferID) {
1149 GL_CALL(GenRenderbuffers(1, &sbDesc.fRenderbufferID));
1150 }
1151 if (!sbDesc.fRenderbufferID) {
1152 return false;
1153 }
1154 GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, sbDesc.fRenderbufferID));
1155 // we start with the last stencil format that succeeded in hopes
1156 // that we won't go through this loop more than once after the
1157 // first (painful) stencil creation.
1158 int sIdx = (i + fLastSuccessfulStencilFmtIdx) % stencilFmtCnt;
1159 const GrGLCaps::StencilFormat& sFmt = this->glCaps().stencilFormats()[sIdx];
1160 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
1161 // we do this "if" so that we don't call the multisample
1162 // version on a GL that doesn't have an MSAA extension.
1163 bool created;
1164 if (samples > 0) {
1165 created = renderbuffer_storage_msaa(fGLContext,
1166 samples,
1167 sFmt.fInternalFormat,
1168 width, height);
1169 } else {
1170 GL_ALLOC_CALL(this->glInterface(), RenderbufferStorage(GR_GL_RENDERBUFFER,
1171 sFmt.fInternalFormat,
1172 width, height));
1173 created = (GR_GL_NO_ERROR == check_alloc_error(rt->desc(), this->glInterface()));
1174 }
1175 if (created) {
1176 fStats.incStencilAttachmentCreates();
1177 // After sized formats we attempt an unsized format and take
1178 // whatever sizes GL gives us. In that case we query for the size.
1179 GrGLStencilAttachment::Format format = sFmt;
1180 get_stencil_rb_sizes(this->glInterface(), &format);
1181 SkAutoTUnref<GrGLStencilAttachment> sb(SkNEW_ARGS(GrGLStencilAttachment,
1182 (this, sbDesc, width, height, samples, format)));
1183 if (this->attachStencilAttachmentToRenderTarget(sb, rt)) {
1184 fLastSuccessfulStencilFmtIdx = sIdx;
1185 rt->renderTargetPriv().didAttachStencilAttachment(sb);
1186 // This work around is currently breaking on windows 7 hd2000 bot when we bind a color buffer
1187 #if 0
1188 // Clear the stencil buffer. We use a special purpose FBO for this so that the
1189 // entire stencil buffer is cleared, even if it is attached to an FBO with a
1190 // smaller color target.
1191 if (0 == fStencilClearFBOID) {
1192 GL_CALL(GenFramebuffers(1, &fStencilClearFBOID));
1193 }
1194
1195 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, fStencilClearFBOID));
1196 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1197 fStats.incRenderTargetBinds();
1198 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1199 GR_GL_STENCIL_ATTACHMENT,
1200 GR_GL_RENDERBUFFER, sbDesc.fRenderbufferID));
1201 if (sFmt.fPacked) {
1202 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1203 GR_GL_DEPTH_ATTACHMENT,
1204 GR_GL_RENDERBUFFER, sbDesc.fRenderbufferID));
1205 }
1206
1207 GL_CALL(ClearStencil(0));
1208 // Many GL implementations seem to have trouble with clearing an FBO with only
1209 // a stencil buffer.
1210 GrGLuint tempRB;
1211 GL_CALL(GenRenderbuffers(1, &tempRB));
1212 GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, tempRB));
1213 if (samples > 0) {
1214 renderbuffer_storage_msaa(fGLContext, samples, GR_GL_RGBA8, width, height);
1215 } else {
1216 GL_CALL(RenderbufferStorage(GR_GL_RENDERBUFFER, GR_GL_RGBA8, width, height));
1217 }
1218 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1219 GR_GL_COLOR_ATTACHMENT0,
1220 GR_GL_RENDERBUFFER, tempRB));
1221
1222 GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
1223
1224 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1225 GR_GL_COLOR_ATTACHMENT0,
1226 GR_GL_RENDERBUFFER, 0));
1227 GL_CALL(DeleteRenderbuffers(1, &tempRB));
1228
1229 // Unbind the SB from the FBO so that we don't keep it alive.
1230 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1231 GR_GL_STENCIL_ATTACHMENT,
1232 GR_GL_RENDERBUFFER, 0));
1233 if (sFmt.fPacked) {
1234 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1235 GR_GL_DEPTH_ATTACHMENT,
1236 GR_GL_RENDERBUFFER, 0));
1237 }
1238 #endif
1239 return true;
1240 }
1241 // Remove the scratch key from this resource so we don't grab it from the cache ever
1242 // again.
1243 sb->resourcePriv().removeScratchKey();
1244 // Set this to 0 since we handed the valid ID off to the failed stencil buffer resource.
1245 sbDesc.fRenderbufferID = 0;
1246 }
1247 }
1248 GL_CALL(DeleteRenderbuffers(1, &sbDesc.fRenderbufferID));
1249 return false;
1250 }
1251
attachStencilAttachmentToRenderTarget(GrStencilAttachment * sb,GrRenderTarget * rt)1252 bool GrGLGpu::attachStencilAttachmentToRenderTarget(GrStencilAttachment* sb, GrRenderTarget* rt) {
1253 GrGLRenderTarget* glrt = static_cast<GrGLRenderTarget*>(rt);
1254
1255 GrGLuint fbo = glrt->renderFBOID();
1256
1257 if (NULL == sb) {
1258 if (rt->renderTargetPriv().getStencilAttachment()) {
1259 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1260 GR_GL_STENCIL_ATTACHMENT,
1261 GR_GL_RENDERBUFFER, 0));
1262 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1263 GR_GL_DEPTH_ATTACHMENT,
1264 GR_GL_RENDERBUFFER, 0));
1265 #ifdef SK_DEBUG
1266 GrGLenum status;
1267 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
1268 SkASSERT(GR_GL_FRAMEBUFFER_COMPLETE == status);
1269 #endif
1270 }
1271 return true;
1272 } else {
1273 GrGLStencilAttachment* glsb = static_cast<GrGLStencilAttachment*>(sb);
1274 GrGLuint rb = glsb->renderbufferID();
1275
1276 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1277 fStats.incRenderTargetBinds();
1278 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, fbo));
1279 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1280 GR_GL_STENCIL_ATTACHMENT,
1281 GR_GL_RENDERBUFFER, rb));
1282 if (glsb->format().fPacked) {
1283 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1284 GR_GL_DEPTH_ATTACHMENT,
1285 GR_GL_RENDERBUFFER, rb));
1286 } else {
1287 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1288 GR_GL_DEPTH_ATTACHMENT,
1289 GR_GL_RENDERBUFFER, 0));
1290 }
1291
1292 GrGLenum status;
1293 if (!this->glCaps().isColorConfigAndStencilFormatVerified(rt->config(), glsb->format())) {
1294 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
1295 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
1296 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1297 GR_GL_STENCIL_ATTACHMENT,
1298 GR_GL_RENDERBUFFER, 0));
1299 if (glsb->format().fPacked) {
1300 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
1301 GR_GL_DEPTH_ATTACHMENT,
1302 GR_GL_RENDERBUFFER, 0));
1303 }
1304 return false;
1305 } else {
1306 fGLContext.caps()->markColorConfigAndStencilFormatAsVerified(
1307 rt->config(),
1308 glsb->format());
1309 }
1310 }
1311 return true;
1312 }
1313 }
1314
1315 ////////////////////////////////////////////////////////////////////////////////
1316
onCreateVertexBuffer(size_t size,bool dynamic)1317 GrVertexBuffer* GrGLGpu::onCreateVertexBuffer(size_t size, bool dynamic) {
1318 GrGLVertexBuffer::Desc desc;
1319 desc.fDynamic = dynamic;
1320 desc.fSizeInBytes = size;
1321
1322 if (this->glCaps().useNonVBOVertexAndIndexDynamicData() && desc.fDynamic) {
1323 desc.fID = 0;
1324 GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer, (this, desc));
1325 return vertexBuffer;
1326 } else {
1327 GL_CALL(GenBuffers(1, &desc.fID));
1328 if (desc.fID) {
1329 fHWGeometryState.setVertexBufferID(this, desc.fID);
1330 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
1331 // make sure driver can allocate memory for this buffer
1332 GL_ALLOC_CALL(this->glInterface(),
1333 BufferData(GR_GL_ARRAY_BUFFER,
1334 (GrGLsizeiptr) desc.fSizeInBytes,
1335 NULL, // data ptr
1336 desc.fDynamic ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
1337 if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
1338 GL_CALL(DeleteBuffers(1, &desc.fID));
1339 this->notifyVertexBufferDelete(desc.fID);
1340 return NULL;
1341 }
1342 GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer, (this, desc));
1343 return vertexBuffer;
1344 }
1345 return NULL;
1346 }
1347 }
1348
onCreateIndexBuffer(size_t size,bool dynamic)1349 GrIndexBuffer* GrGLGpu::onCreateIndexBuffer(size_t size, bool dynamic) {
1350 GrGLIndexBuffer::Desc desc;
1351 desc.fDynamic = dynamic;
1352 desc.fSizeInBytes = size;
1353
1354 if (this->glCaps().useNonVBOVertexAndIndexDynamicData() && desc.fDynamic) {
1355 desc.fID = 0;
1356 GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer, (this, desc));
1357 return indexBuffer;
1358 } else {
1359 GL_CALL(GenBuffers(1, &desc.fID));
1360 if (desc.fID) {
1361 fHWGeometryState.setIndexBufferIDOnDefaultVertexArray(this, desc.fID);
1362 CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
1363 // make sure driver can allocate memory for this buffer
1364 GL_ALLOC_CALL(this->glInterface(),
1365 BufferData(GR_GL_ELEMENT_ARRAY_BUFFER,
1366 (GrGLsizeiptr) desc.fSizeInBytes,
1367 NULL, // data ptr
1368 desc.fDynamic ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
1369 if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
1370 GL_CALL(DeleteBuffers(1, &desc.fID));
1371 this->notifyIndexBufferDelete(desc.fID);
1372 return NULL;
1373 }
1374 GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer, (this, desc));
1375 return indexBuffer;
1376 }
1377 return NULL;
1378 }
1379 }
1380
flushScissor(const GrScissorState & scissorState,const GrGLIRect & rtViewport,GrSurfaceOrigin rtOrigin)1381 void GrGLGpu::flushScissor(const GrScissorState& scissorState,
1382 const GrGLIRect& rtViewport,
1383 GrSurfaceOrigin rtOrigin) {
1384 if (scissorState.enabled()) {
1385 GrGLIRect scissor;
1386 scissor.setRelativeTo(rtViewport,
1387 scissorState.rect().fLeft,
1388 scissorState.rect().fTop,
1389 scissorState.rect().width(),
1390 scissorState.rect().height(),
1391 rtOrigin);
1392 // if the scissor fully contains the viewport then we fall through and
1393 // disable the scissor test.
1394 if (!scissor.contains(rtViewport)) {
1395 if (fHWScissorSettings.fRect != scissor) {
1396 scissor.pushToGLScissor(this->glInterface());
1397 fHWScissorSettings.fRect = scissor;
1398 }
1399 if (kYes_TriState != fHWScissorSettings.fEnabled) {
1400 GL_CALL(Enable(GR_GL_SCISSOR_TEST));
1401 fHWScissorSettings.fEnabled = kYes_TriState;
1402 }
1403 return;
1404 }
1405 }
1406
1407 // See fall through note above
1408 this->disableScissor();
1409 }
1410
flushGLState(const DrawArgs & args)1411 bool GrGLGpu::flushGLState(const DrawArgs& args) {
1412 GrXferProcessor::BlendInfo blendInfo;
1413 const GrPipeline& pipeline = *args.fPipeline;
1414 args.fPipeline->getXferProcessor()->getBlendInfo(&blendInfo);
1415
1416 this->flushDither(pipeline.isDitherState());
1417 this->flushColorWrite(blendInfo.fWriteColor);
1418 this->flushDrawFace(pipeline.getDrawFace());
1419
1420 fCurrentProgram.reset(fProgramCache->getProgram(args));
1421 if (NULL == fCurrentProgram.get()) {
1422 GrContextDebugf(this->getContext(), "Failed to create program!\n");
1423 return false;
1424 }
1425
1426 fCurrentProgram.get()->ref();
1427
1428 GrGLuint programID = fCurrentProgram->programID();
1429 if (fHWProgramID != programID) {
1430 GL_CALL(UseProgram(programID));
1431 fHWProgramID = programID;
1432 }
1433
1434 if (blendInfo.fWriteColor) {
1435 this->flushBlend(blendInfo);
1436 }
1437
1438 fCurrentProgram->setData(*args.fPrimitiveProcessor, pipeline, *args.fBatchTracker);
1439
1440 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(pipeline.getRenderTarget());
1441 this->flushStencil(pipeline.getStencil());
1442 this->flushScissor(pipeline.getScissorState(), glRT->getViewport(), glRT->origin());
1443 this->flushHWAAState(glRT, pipeline.isHWAntialiasState());
1444
1445 // This must come after textures are flushed because a texture may need
1446 // to be msaa-resolved (which will modify bound FBO state).
1447 this->flushRenderTarget(glRT, NULL);
1448
1449 return true;
1450 }
1451
setupGeometry(const GrPrimitiveProcessor & primProc,const GrNonInstancedVertices & vertices,size_t * indexOffsetInBytes)1452 void GrGLGpu::setupGeometry(const GrPrimitiveProcessor& primProc,
1453 const GrNonInstancedVertices& vertices,
1454 size_t* indexOffsetInBytes) {
1455 GrGLVertexBuffer* vbuf;
1456 vbuf = (GrGLVertexBuffer*) vertices.vertexBuffer();
1457
1458 SkASSERT(vbuf);
1459 SkASSERT(!vbuf->isMapped());
1460
1461 GrGLIndexBuffer* ibuf = NULL;
1462 if (vertices.isIndexed()) {
1463 SkASSERT(indexOffsetInBytes);
1464
1465 *indexOffsetInBytes = 0;
1466 ibuf = (GrGLIndexBuffer*)vertices.indexBuffer();
1467
1468 SkASSERT(ibuf);
1469 SkASSERT(!ibuf->isMapped());
1470 *indexOffsetInBytes += ibuf->baseOffset();
1471 }
1472 GrGLAttribArrayState* attribState =
1473 fHWGeometryState.bindArrayAndBuffersToDraw(this, vbuf, ibuf);
1474
1475 int vaCount = primProc.numAttribs();
1476 if (vaCount > 0) {
1477
1478 GrGLsizei stride = static_cast<GrGLsizei>(primProc.getVertexStride());
1479
1480 size_t vertexOffsetInBytes = stride * vertices.startVertex();
1481
1482 vertexOffsetInBytes += vbuf->baseOffset();
1483
1484 uint32_t usedAttribArraysMask = 0;
1485 size_t offset = 0;
1486
1487 for (int attribIndex = 0; attribIndex < vaCount; attribIndex++) {
1488 const GrGeometryProcessor::Attribute& attrib = primProc.getAttrib(attribIndex);
1489 usedAttribArraysMask |= (1 << attribIndex);
1490 GrVertexAttribType attribType = attrib.fType;
1491 attribState->set(this,
1492 attribIndex,
1493 vbuf,
1494 GrGLAttribTypeToLayout(attribType).fCount,
1495 GrGLAttribTypeToLayout(attribType).fType,
1496 GrGLAttribTypeToLayout(attribType).fNormalized,
1497 stride,
1498 reinterpret_cast<GrGLvoid*>(vertexOffsetInBytes + offset));
1499 offset += attrib.fOffset;
1500 }
1501 attribState->disableUnusedArrays(this, usedAttribArraysMask);
1502 }
1503 }
1504
buildProgramDesc(GrProgramDesc * desc,const GrPrimitiveProcessor & primProc,const GrPipeline & pipeline,const GrBatchTracker & batchTracker) const1505 void GrGLGpu::buildProgramDesc(GrProgramDesc* desc,
1506 const GrPrimitiveProcessor& primProc,
1507 const GrPipeline& pipeline,
1508 const GrBatchTracker& batchTracker) const {
1509 if (!GrGLProgramDescBuilder::Build(desc, primProc, pipeline, this, batchTracker)) {
1510 SkDEBUGFAIL("Failed to generate GL program descriptor");
1511 }
1512 }
1513
disableScissor()1514 void GrGLGpu::disableScissor() {
1515 if (kNo_TriState != fHWScissorSettings.fEnabled) {
1516 GL_CALL(Disable(GR_GL_SCISSOR_TEST));
1517 fHWScissorSettings.fEnabled = kNo_TriState;
1518 return;
1519 }
1520 }
1521
onClear(GrRenderTarget * target,const SkIRect * rect,GrColor color,bool canIgnoreRect)1522 void GrGLGpu::onClear(GrRenderTarget* target, const SkIRect* rect, GrColor color,
1523 bool canIgnoreRect) {
1524 // parent class should never let us get here with no RT
1525 SkASSERT(target);
1526 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(target);
1527
1528 if (canIgnoreRect && this->glCaps().fullClearIsFree()) {
1529 rect = NULL;
1530 }
1531
1532 SkIRect clippedRect;
1533 if (rect) {
1534 // flushScissor expects rect to be clipped to the target.
1535 clippedRect = *rect;
1536 SkIRect rtRect = SkIRect::MakeWH(target->width(), target->height());
1537 if (clippedRect.intersect(rtRect)) {
1538 rect = &clippedRect;
1539 } else {
1540 return;
1541 }
1542 }
1543
1544 this->flushRenderTarget(glRT, rect);
1545 GrScissorState scissorState;
1546 if (rect) {
1547 scissorState.set(*rect);
1548 }
1549 this->flushScissor(scissorState, glRT->getViewport(), glRT->origin());
1550
1551 GrGLfloat r, g, b, a;
1552 static const GrGLfloat scale255 = 1.f / 255.f;
1553 a = GrColorUnpackA(color) * scale255;
1554 GrGLfloat scaleRGB = scale255;
1555 r = GrColorUnpackR(color) * scaleRGB;
1556 g = GrColorUnpackG(color) * scaleRGB;
1557 b = GrColorUnpackB(color) * scaleRGB;
1558
1559 GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
1560 fHWWriteToColor = kYes_TriState;
1561 GL_CALL(ClearColor(r, g, b, a));
1562 GL_CALL(Clear(GR_GL_COLOR_BUFFER_BIT));
1563 }
1564
discard(GrRenderTarget * renderTarget)1565 void GrGLGpu::discard(GrRenderTarget* renderTarget) {
1566 SkASSERT(renderTarget);
1567 if (!this->caps()->discardRenderTargetSupport()) {
1568 return;
1569 }
1570
1571 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(renderTarget);
1572 if (renderTarget->getUniqueID() != fHWBoundRenderTargetUniqueID) {
1573 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1574 fStats.incRenderTargetBinds();
1575 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, glRT->renderFBOID()));
1576 }
1577 switch (this->glCaps().invalidateFBType()) {
1578 case GrGLCaps::kNone_InvalidateFBType:
1579 SkFAIL("Should never get here.");
1580 break;
1581 case GrGLCaps::kInvalidate_InvalidateFBType:
1582 if (0 == glRT->renderFBOID()) {
1583 // When rendering to the default framebuffer the legal values for attachments
1584 // are GL_COLOR, GL_DEPTH, GL_STENCIL, ... rather than the various FBO attachment
1585 // types.
1586 static const GrGLenum attachments[] = { GR_GL_COLOR };
1587 GL_CALL(InvalidateFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1588 attachments));
1589 } else {
1590 static const GrGLenum attachments[] = { GR_GL_COLOR_ATTACHMENT0 };
1591 GL_CALL(InvalidateFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1592 attachments));
1593 }
1594 break;
1595 case GrGLCaps::kDiscard_InvalidateFBType: {
1596 if (0 == glRT->renderFBOID()) {
1597 // When rendering to the default framebuffer the legal values for attachments
1598 // are GL_COLOR, GL_DEPTH, GL_STENCIL, ... rather than the various FBO attachment
1599 // types. See glDiscardFramebuffer() spec.
1600 static const GrGLenum attachments[] = { GR_GL_COLOR };
1601 GL_CALL(DiscardFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1602 attachments));
1603 } else {
1604 static const GrGLenum attachments[] = { GR_GL_COLOR_ATTACHMENT0 };
1605 GL_CALL(DiscardFramebuffer(GR_GL_FRAMEBUFFER, SK_ARRAY_COUNT(attachments),
1606 attachments));
1607 }
1608 break;
1609 }
1610 }
1611 renderTarget->flagAsResolved();
1612 }
1613
1614
clearStencil(GrRenderTarget * target)1615 void GrGLGpu::clearStencil(GrRenderTarget* target) {
1616 if (NULL == target) {
1617 return;
1618 }
1619 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(target);
1620 this->flushRenderTarget(glRT, &SkIRect::EmptyIRect());
1621
1622 this->disableScissor();
1623
1624 GL_CALL(StencilMask(0xffffffff));
1625 GL_CALL(ClearStencil(0));
1626 GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
1627 fHWStencilSettings.invalidate();
1628 }
1629
onClearStencilClip(GrRenderTarget * target,const SkIRect & rect,bool insideClip)1630 void GrGLGpu::onClearStencilClip(GrRenderTarget* target, const SkIRect& rect, bool insideClip) {
1631 SkASSERT(target);
1632
1633 GrStencilAttachment* sb = target->renderTargetPriv().getStencilAttachment();
1634 // this should only be called internally when we know we have a
1635 // stencil buffer.
1636 SkASSERT(sb);
1637 GrGLint stencilBitCount = sb->bits();
1638 #if 0
1639 SkASSERT(stencilBitCount > 0);
1640 GrGLint clipStencilMask = (1 << (stencilBitCount - 1));
1641 #else
1642 // we could just clear the clip bit but when we go through
1643 // ANGLE a partial stencil mask will cause clears to be
1644 // turned into draws. Our contract on GrDrawTarget says that
1645 // changing the clip between stencil passes may or may not
1646 // zero the client's clip bits. So we just clear the whole thing.
1647 static const GrGLint clipStencilMask = ~0;
1648 #endif
1649 GrGLint value;
1650 if (insideClip) {
1651 value = (1 << (stencilBitCount - 1));
1652 } else {
1653 value = 0;
1654 }
1655 GrGLRenderTarget* glRT = static_cast<GrGLRenderTarget*>(target);
1656 this->flushRenderTarget(glRT, &SkIRect::EmptyIRect());
1657
1658 GrScissorState scissorState;
1659 scissorState.set(rect);
1660 this->flushScissor(scissorState, glRT->getViewport(), glRT->origin());
1661
1662 GL_CALL(StencilMask((uint32_t) clipStencilMask));
1663 GL_CALL(ClearStencil(value));
1664 GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
1665 fHWStencilSettings.invalidate();
1666 }
1667
readPixelsWillPayForYFlip(GrRenderTarget * renderTarget,int left,int top,int width,int height,GrPixelConfig config,size_t rowBytes) const1668 bool GrGLGpu::readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
1669 int left, int top,
1670 int width, int height,
1671 GrPixelConfig config,
1672 size_t rowBytes) const {
1673 // If this rendertarget is aready TopLeft, we don't need to flip.
1674 if (kTopLeft_GrSurfaceOrigin == renderTarget->origin()) {
1675 return false;
1676 }
1677
1678 // if GL can do the flip then we'll never pay for it.
1679 if (this->glCaps().packFlipYSupport()) {
1680 return false;
1681 }
1682
1683 // If we have to do memcpy to handle non-trim rowBytes then we
1684 // get the flip for free. Otherwise it costs.
1685 if (this->glCaps().packRowLengthSupport()) {
1686 return true;
1687 }
1688 // If we have to do memcpys to handle rowBytes then y-flip is free
1689 // Note the rowBytes might be tight to the passed in data, but if data
1690 // gets clipped in x to the target the rowBytes will no longer be tight.
1691 if (left >= 0 && (left + width) < renderTarget->width()) {
1692 return 0 == rowBytes ||
1693 GrBytesPerPixel(config) * width == rowBytes;
1694 } else {
1695 return false;
1696 }
1697 }
1698
onReadPixels(GrRenderTarget * target,int left,int top,int width,int height,GrPixelConfig config,void * buffer,size_t rowBytes)1699 bool GrGLGpu::onReadPixels(GrRenderTarget* target,
1700 int left, int top,
1701 int width, int height,
1702 GrPixelConfig config,
1703 void* buffer,
1704 size_t rowBytes) {
1705 // We cannot read pixels into a compressed buffer
1706 if (GrPixelConfigIsCompressed(config)) {
1707 return false;
1708 }
1709
1710 GrGLenum format = 0;
1711 GrGLenum type = 0;
1712 bool flipY = kBottomLeft_GrSurfaceOrigin == target->origin();
1713 if (!this->configToGLFormats(config, false, NULL, &format, &type)) {
1714 return false;
1715 }
1716 size_t bpp = GrBytesPerPixel(config);
1717 if (!adjust_pixel_ops_params(target->width(), target->height(), bpp,
1718 &left, &top, &width, &height,
1719 const_cast<const void**>(&buffer),
1720 &rowBytes)) {
1721 return false;
1722 }
1723
1724 // resolve the render target if necessary
1725 GrGLRenderTarget* tgt = static_cast<GrGLRenderTarget*>(target);
1726 switch (tgt->getResolveType()) {
1727 case GrGLRenderTarget::kCantResolve_ResolveType:
1728 return false;
1729 case GrGLRenderTarget::kAutoResolves_ResolveType:
1730 this->flushRenderTarget(static_cast<GrGLRenderTarget*>(target), &SkIRect::EmptyIRect());
1731 break;
1732 case GrGLRenderTarget::kCanResolve_ResolveType:
1733 this->onResolveRenderTarget(tgt);
1734 // we don't track the state of the READ FBO ID.
1735 fStats.incRenderTargetBinds();
1736 GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER,
1737 tgt->textureFBOID()));
1738 break;
1739 default:
1740 SkFAIL("Unknown resolve type");
1741 }
1742
1743 const GrGLIRect& glvp = tgt->getViewport();
1744
1745 // the read rect is viewport-relative
1746 GrGLIRect readRect;
1747 readRect.setRelativeTo(glvp, left, top, width, height, target->origin());
1748
1749 size_t tightRowBytes = bpp * width;
1750 if (0 == rowBytes) {
1751 rowBytes = tightRowBytes;
1752 }
1753 size_t readDstRowBytes = tightRowBytes;
1754 void* readDst = buffer;
1755
1756 // determine if GL can read using the passed rowBytes or if we need
1757 // a scratch buffer.
1758 GrAutoMalloc<32 * sizeof(GrColor)> scratch;
1759 if (rowBytes != tightRowBytes) {
1760 if (this->glCaps().packRowLengthSupport()) {
1761 SkASSERT(!(rowBytes % sizeof(GrColor)));
1762 GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH,
1763 static_cast<GrGLint>(rowBytes / sizeof(GrColor))));
1764 readDstRowBytes = rowBytes;
1765 } else {
1766 scratch.reset(tightRowBytes * height);
1767 readDst = scratch.get();
1768 }
1769 }
1770 if (flipY && this->glCaps().packFlipYSupport()) {
1771 GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 1));
1772 }
1773 GL_CALL(ReadPixels(readRect.fLeft, readRect.fBottom,
1774 readRect.fWidth, readRect.fHeight,
1775 format, type, readDst));
1776 if (readDstRowBytes != tightRowBytes) {
1777 SkASSERT(this->glCaps().packRowLengthSupport());
1778 GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
1779 }
1780 if (flipY && this->glCaps().packFlipYSupport()) {
1781 GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 0));
1782 flipY = false;
1783 }
1784
1785 // now reverse the order of the rows, since GL's are bottom-to-top, but our
1786 // API presents top-to-bottom. We must preserve the padding contents. Note
1787 // that the above readPixels did not overwrite the padding.
1788 if (readDst == buffer) {
1789 SkASSERT(rowBytes == readDstRowBytes);
1790 if (flipY) {
1791 scratch.reset(tightRowBytes);
1792 void* tmpRow = scratch.get();
1793 // flip y in-place by rows
1794 const int halfY = height >> 1;
1795 char* top = reinterpret_cast<char*>(buffer);
1796 char* bottom = top + (height - 1) * rowBytes;
1797 for (int y = 0; y < halfY; y++) {
1798 memcpy(tmpRow, top, tightRowBytes);
1799 memcpy(top, bottom, tightRowBytes);
1800 memcpy(bottom, tmpRow, tightRowBytes);
1801 top += rowBytes;
1802 bottom -= rowBytes;
1803 }
1804 }
1805 } else {
1806 SkASSERT(readDst != buffer); SkASSERT(rowBytes != tightRowBytes);
1807 // copy from readDst to buffer while flipping y
1808 // const int halfY = height >> 1;
1809 const char* src = reinterpret_cast<const char*>(readDst);
1810 char* dst = reinterpret_cast<char*>(buffer);
1811 if (flipY) {
1812 dst += (height-1) * rowBytes;
1813 }
1814 for (int y = 0; y < height; y++) {
1815 memcpy(dst, src, tightRowBytes);
1816 src += readDstRowBytes;
1817 if (!flipY) {
1818 dst += rowBytes;
1819 } else {
1820 dst -= rowBytes;
1821 }
1822 }
1823 }
1824 return true;
1825 }
1826
flushRenderTarget(GrGLRenderTarget * target,const SkIRect * bound)1827 void GrGLGpu::flushRenderTarget(GrGLRenderTarget* target, const SkIRect* bound) {
1828
1829 SkASSERT(target);
1830
1831 uint32_t rtID = target->getUniqueID();
1832 if (fHWBoundRenderTargetUniqueID != rtID) {
1833 fStats.incRenderTargetBinds();
1834 GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, target->renderFBOID()));
1835 #ifdef SK_DEBUG
1836 // don't do this check in Chromium -- this is causing
1837 // lots of repeated command buffer flushes when the compositor is
1838 // rendering with Ganesh, which is really slow; even too slow for
1839 // Debug mode.
1840 if (!this->glContext().isChromium()) {
1841 GrGLenum status;
1842 GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
1843 if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
1844 SkDebugf("GrGLGpu::flushRenderTarget glCheckFramebufferStatus %x\n", status);
1845 }
1846 }
1847 #endif
1848 fHWBoundRenderTargetUniqueID = rtID;
1849 const GrGLIRect& vp = target->getViewport();
1850 if (fHWViewport != vp) {
1851 vp.pushToGLViewport(this->glInterface());
1852 fHWViewport = vp;
1853 }
1854 }
1855 if (NULL == bound || !bound->isEmpty()) {
1856 target->flagAsNeedingResolve(bound);
1857 }
1858
1859 GrTexture *texture = target->asTexture();
1860 if (texture) {
1861 texture->texturePriv().dirtyMipMaps(true);
1862 }
1863 }
1864
1865 GrGLenum gPrimitiveType2GLMode[] = {
1866 GR_GL_TRIANGLES,
1867 GR_GL_TRIANGLE_STRIP,
1868 GR_GL_TRIANGLE_FAN,
1869 GR_GL_POINTS,
1870 GR_GL_LINES,
1871 GR_GL_LINE_STRIP
1872 };
1873
1874 #define SWAP_PER_DRAW 0
1875
1876 #if SWAP_PER_DRAW
1877 #if defined(SK_BUILD_FOR_MAC)
1878 #include <AGL/agl.h>
1879 #elif defined(SK_BUILD_FOR_WIN32)
1880 #include <gl/GL.h>
SwapBuf()1881 void SwapBuf() {
1882 DWORD procID = GetCurrentProcessId();
1883 HWND hwnd = GetTopWindow(GetDesktopWindow());
1884 while(hwnd) {
1885 DWORD wndProcID = 0;
1886 GetWindowThreadProcessId(hwnd, &wndProcID);
1887 if(wndProcID == procID) {
1888 SwapBuffers(GetDC(hwnd));
1889 }
1890 hwnd = GetNextWindow(hwnd, GW_HWNDNEXT);
1891 }
1892 }
1893 #endif
1894 #endif
1895
onDraw(const DrawArgs & args,const GrNonInstancedVertices & vertices)1896 void GrGLGpu::onDraw(const DrawArgs& args, const GrNonInstancedVertices& vertices) {
1897 if (!this->flushGLState(args)) {
1898 return;
1899 }
1900
1901 size_t indexOffsetInBytes = 0;
1902 this->setupGeometry(*args.fPrimitiveProcessor, vertices, &indexOffsetInBytes);
1903
1904 SkASSERT((size_t)vertices.primitiveType() < SK_ARRAY_COUNT(gPrimitiveType2GLMode));
1905
1906 if (vertices.isIndexed()) {
1907 GrGLvoid* indices =
1908 reinterpret_cast<GrGLvoid*>(indexOffsetInBytes + sizeof(uint16_t) *
1909 vertices.startIndex());
1910 // info.startVertex() was accounted for by setupGeometry.
1911 GL_CALL(DrawElements(gPrimitiveType2GLMode[vertices.primitiveType()],
1912 vertices.indexCount(),
1913 GR_GL_UNSIGNED_SHORT,
1914 indices));
1915 } else {
1916 // Pass 0 for parameter first. We have to adjust glVertexAttribPointer() to account for
1917 // startVertex in the DrawElements case. So we always rely on setupGeometry to have
1918 // accounted for startVertex.
1919 GL_CALL(DrawArrays(gPrimitiveType2GLMode[vertices.primitiveType()], 0,
1920 vertices.vertexCount()));
1921 }
1922 #if SWAP_PER_DRAW
1923 glFlush();
1924 #if defined(SK_BUILD_FOR_MAC)
1925 aglSwapBuffers(aglGetCurrentContext());
1926 int set_a_break_pt_here = 9;
1927 aglSwapBuffers(aglGetCurrentContext());
1928 #elif defined(SK_BUILD_FOR_WIN32)
1929 SwapBuf();
1930 int set_a_break_pt_here = 9;
1931 SwapBuf();
1932 #endif
1933 #endif
1934 }
1935
onStencilPath(const GrPath * path,const StencilPathState & state)1936 void GrGLGpu::onStencilPath(const GrPath* path, const StencilPathState& state) {
1937 this->flushColorWrite(false);
1938 this->flushDrawFace(GrPipelineBuilder::kBoth_DrawFace);
1939
1940 GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(state.fRenderTarget);
1941 SkISize size = SkISize::Make(rt->width(), rt->height());
1942 this->glPathRendering()->setProjectionMatrix(*state.fViewMatrix, size, rt->origin());
1943 this->flushScissor(*state.fScissor, rt->getViewport(), rt->origin());
1944 this->flushHWAAState(rt, state.fUseHWAA);
1945 this->flushRenderTarget(rt, NULL);
1946
1947 fPathRendering->stencilPath(path, *state.fStencil);
1948 }
1949
onDrawPath(const DrawArgs & args,const GrPath * path,const GrStencilSettings & stencil)1950 void GrGLGpu::onDrawPath(const DrawArgs& args, const GrPath* path,
1951 const GrStencilSettings& stencil) {
1952 if (!this->flushGLState(args)) {
1953 return;
1954 }
1955 fPathRendering->drawPath(path, stencil);
1956 }
1957
onDrawPaths(const DrawArgs & args,const GrPathRange * pathRange,const void * indices,GrDrawTarget::PathIndexType indexType,const float transformValues[],GrDrawTarget::PathTransformType transformType,int count,const GrStencilSettings & stencil)1958 void GrGLGpu::onDrawPaths(const DrawArgs& args,
1959 const GrPathRange* pathRange,
1960 const void* indices,
1961 GrDrawTarget::PathIndexType indexType,
1962 const float transformValues[],
1963 GrDrawTarget::PathTransformType transformType,
1964 int count,
1965 const GrStencilSettings& stencil) {
1966 if (!this->flushGLState(args)) {
1967 return;
1968 }
1969 fPathRendering->drawPaths(pathRange, indices, indexType, transformValues,
1970 transformType, count, stencil);
1971 }
1972
onResolveRenderTarget(GrRenderTarget * target)1973 void GrGLGpu::onResolveRenderTarget(GrRenderTarget* target) {
1974 GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(target);
1975 if (rt->needsResolve()) {
1976 // Some extensions automatically resolves the texture when it is read.
1977 if (this->glCaps().usesMSAARenderBuffers()) {
1978 SkASSERT(rt->textureFBOID() != rt->renderFBOID());
1979 fStats.incRenderTargetBinds();
1980 fStats.incRenderTargetBinds();
1981 GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER, rt->renderFBOID()));
1982 GL_CALL(BindFramebuffer(GR_GL_DRAW_FRAMEBUFFER, rt->textureFBOID()));
1983 // make sure we go through flushRenderTarget() since we've modified
1984 // the bound DRAW FBO ID.
1985 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
1986 const GrGLIRect& vp = rt->getViewport();
1987 const SkIRect dirtyRect = rt->getResolveRect();
1988
1989 if (GrGLCaps::kES_Apple_MSFBOType == this->glCaps().msFBOType()) {
1990 // Apple's extension uses the scissor as the blit bounds.
1991 GrScissorState scissorState;
1992 scissorState.set(dirtyRect);
1993 this->flushScissor(scissorState, vp, rt->origin());
1994 GL_CALL(ResolveMultisampleFramebuffer());
1995 } else {
1996 GrGLIRect r;
1997 r.setRelativeTo(vp, dirtyRect.fLeft, dirtyRect.fTop,
1998 dirtyRect.width(), dirtyRect.height(), target->origin());
1999
2000 int right = r.fLeft + r.fWidth;
2001 int top = r.fBottom + r.fHeight;
2002
2003 // BlitFrameBuffer respects the scissor, so disable it.
2004 this->disableScissor();
2005 GL_CALL(BlitFramebuffer(r.fLeft, r.fBottom, right, top,
2006 r.fLeft, r.fBottom, right, top,
2007 GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
2008 }
2009 }
2010 rt->flagAsResolved();
2011 }
2012 }
2013
2014 namespace {
2015
2016
gr_to_gl_stencil_op(GrStencilOp op)2017 GrGLenum gr_to_gl_stencil_op(GrStencilOp op) {
2018 static const GrGLenum gTable[] = {
2019 GR_GL_KEEP, // kKeep_StencilOp
2020 GR_GL_REPLACE, // kReplace_StencilOp
2021 GR_GL_INCR_WRAP, // kIncWrap_StencilOp
2022 GR_GL_INCR, // kIncClamp_StencilOp
2023 GR_GL_DECR_WRAP, // kDecWrap_StencilOp
2024 GR_GL_DECR, // kDecClamp_StencilOp
2025 GR_GL_ZERO, // kZero_StencilOp
2026 GR_GL_INVERT, // kInvert_StencilOp
2027 };
2028 GR_STATIC_ASSERT(SK_ARRAY_COUNT(gTable) == kStencilOpCount);
2029 GR_STATIC_ASSERT(0 == kKeep_StencilOp);
2030 GR_STATIC_ASSERT(1 == kReplace_StencilOp);
2031 GR_STATIC_ASSERT(2 == kIncWrap_StencilOp);
2032 GR_STATIC_ASSERT(3 == kIncClamp_StencilOp);
2033 GR_STATIC_ASSERT(4 == kDecWrap_StencilOp);
2034 GR_STATIC_ASSERT(5 == kDecClamp_StencilOp);
2035 GR_STATIC_ASSERT(6 == kZero_StencilOp);
2036 GR_STATIC_ASSERT(7 == kInvert_StencilOp);
2037 SkASSERT((unsigned) op < kStencilOpCount);
2038 return gTable[op];
2039 }
2040
set_gl_stencil(const GrGLInterface * gl,const GrStencilSettings & settings,GrGLenum glFace,GrStencilSettings::Face grFace)2041 void set_gl_stencil(const GrGLInterface* gl,
2042 const GrStencilSettings& settings,
2043 GrGLenum glFace,
2044 GrStencilSettings::Face grFace) {
2045 GrGLenum glFunc = GrToGLStencilFunc(settings.func(grFace));
2046 GrGLenum glFailOp = gr_to_gl_stencil_op(settings.failOp(grFace));
2047 GrGLenum glPassOp = gr_to_gl_stencil_op(settings.passOp(grFace));
2048
2049 GrGLint ref = settings.funcRef(grFace);
2050 GrGLint mask = settings.funcMask(grFace);
2051 GrGLint writeMask = settings.writeMask(grFace);
2052
2053 if (GR_GL_FRONT_AND_BACK == glFace) {
2054 // we call the combined func just in case separate stencil is not
2055 // supported.
2056 GR_GL_CALL(gl, StencilFunc(glFunc, ref, mask));
2057 GR_GL_CALL(gl, StencilMask(writeMask));
2058 GR_GL_CALL(gl, StencilOp(glFailOp, glPassOp, glPassOp));
2059 } else {
2060 GR_GL_CALL(gl, StencilFuncSeparate(glFace, glFunc, ref, mask));
2061 GR_GL_CALL(gl, StencilMaskSeparate(glFace, writeMask));
2062 GR_GL_CALL(gl, StencilOpSeparate(glFace, glFailOp, glPassOp, glPassOp));
2063 }
2064 }
2065 }
2066
flushStencil(const GrStencilSettings & stencilSettings)2067 void GrGLGpu::flushStencil(const GrStencilSettings& stencilSettings) {
2068 if (fHWStencilSettings != stencilSettings) {
2069 if (stencilSettings.isDisabled()) {
2070 if (kNo_TriState != fHWStencilTestEnabled) {
2071 GL_CALL(Disable(GR_GL_STENCIL_TEST));
2072 fHWStencilTestEnabled = kNo_TriState;
2073 }
2074 } else {
2075 if (kYes_TriState != fHWStencilTestEnabled) {
2076 GL_CALL(Enable(GR_GL_STENCIL_TEST));
2077 fHWStencilTestEnabled = kYes_TriState;
2078 }
2079 }
2080 if (!stencilSettings.isDisabled()) {
2081 if (this->caps()->twoSidedStencilSupport()) {
2082 set_gl_stencil(this->glInterface(),
2083 stencilSettings,
2084 GR_GL_FRONT,
2085 GrStencilSettings::kFront_Face);
2086 set_gl_stencil(this->glInterface(),
2087 stencilSettings,
2088 GR_GL_BACK,
2089 GrStencilSettings::kBack_Face);
2090 } else {
2091 set_gl_stencil(this->glInterface(),
2092 stencilSettings,
2093 GR_GL_FRONT_AND_BACK,
2094 GrStencilSettings::kFront_Face);
2095 }
2096 }
2097 fHWStencilSettings = stencilSettings;
2098 }
2099 }
2100
flushHWAAState(GrRenderTarget * rt,bool useHWAA)2101 void GrGLGpu::flushHWAAState(GrRenderTarget* rt, bool useHWAA) {
2102 SkASSERT(!useHWAA || rt->isMultisampled());
2103
2104 if (kGL_GrGLStandard == this->glStandard()) {
2105 if (useHWAA) {
2106 if (kYes_TriState != fMSAAEnabled) {
2107 GL_CALL(Enable(GR_GL_MULTISAMPLE));
2108 fMSAAEnabled = kYes_TriState;
2109 }
2110 } else {
2111 if (kNo_TriState != fMSAAEnabled) {
2112 GL_CALL(Disable(GR_GL_MULTISAMPLE));
2113 fMSAAEnabled = kNo_TriState;
2114 }
2115 }
2116 }
2117 }
2118
flushBlend(const GrXferProcessor::BlendInfo & blendInfo)2119 void GrGLGpu::flushBlend(const GrXferProcessor::BlendInfo& blendInfo) {
2120 // Any optimization to disable blending should have already been applied and
2121 // tweaked the equation to "add" or "subtract", and the coeffs to (1, 0).
2122
2123 GrBlendEquation equation = blendInfo.fEquation;
2124 GrBlendCoeff srcCoeff = blendInfo.fSrcBlend;
2125 GrBlendCoeff dstCoeff = blendInfo.fDstBlend;
2126 bool blendOff = (kAdd_GrBlendEquation == equation || kSubtract_GrBlendEquation == equation) &&
2127 kOne_GrBlendCoeff == srcCoeff && kZero_GrBlendCoeff == dstCoeff;
2128 if (blendOff) {
2129 if (kNo_TriState != fHWBlendState.fEnabled) {
2130 GL_CALL(Disable(GR_GL_BLEND));
2131 fHWBlendState.fEnabled = kNo_TriState;
2132 }
2133 return;
2134 }
2135
2136 if (kYes_TriState != fHWBlendState.fEnabled) {
2137 GL_CALL(Enable(GR_GL_BLEND));
2138 fHWBlendState.fEnabled = kYes_TriState;
2139 }
2140
2141 if (fHWBlendState.fEquation != equation) {
2142 GL_CALL(BlendEquation(gXfermodeEquation2Blend[equation]));
2143 fHWBlendState.fEquation = equation;
2144 }
2145
2146 if (GrBlendEquationIsAdvanced(equation)) {
2147 SkASSERT(this->caps()->advancedBlendEquationSupport());
2148 // Advanced equations have no other blend state.
2149 return;
2150 }
2151
2152 if (fHWBlendState.fSrcCoeff != srcCoeff ||
2153 fHWBlendState.fDstCoeff != dstCoeff) {
2154 GL_CALL(BlendFunc(gXfermodeCoeff2Blend[srcCoeff],
2155 gXfermodeCoeff2Blend[dstCoeff]));
2156 fHWBlendState.fSrcCoeff = srcCoeff;
2157 fHWBlendState.fDstCoeff = dstCoeff;
2158 }
2159
2160 GrColor blendConst = blendInfo.fBlendConstant;
2161 if ((BlendCoeffReferencesConstant(srcCoeff) ||
2162 BlendCoeffReferencesConstant(dstCoeff)) &&
2163 (!fHWBlendState.fConstColorValid ||
2164 fHWBlendState.fConstColor != blendConst)) {
2165 GrGLfloat c[4];
2166 GrColorToRGBAFloat(blendConst, c);
2167 GL_CALL(BlendColor(c[0], c[1], c[2], c[3]));
2168 fHWBlendState.fConstColor = blendConst;
2169 fHWBlendState.fConstColorValid = true;
2170 }
2171 }
2172
tile_to_gl_wrap(SkShader::TileMode tm)2173 static inline GrGLenum tile_to_gl_wrap(SkShader::TileMode tm) {
2174 static const GrGLenum gWrapModes[] = {
2175 GR_GL_CLAMP_TO_EDGE,
2176 GR_GL_REPEAT,
2177 GR_GL_MIRRORED_REPEAT
2178 };
2179 GR_STATIC_ASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gWrapModes));
2180 GR_STATIC_ASSERT(0 == SkShader::kClamp_TileMode);
2181 GR_STATIC_ASSERT(1 == SkShader::kRepeat_TileMode);
2182 GR_STATIC_ASSERT(2 == SkShader::kMirror_TileMode);
2183 return gWrapModes[tm];
2184 }
2185
bindTexture(int unitIdx,const GrTextureParams & params,GrGLTexture * texture)2186 void GrGLGpu::bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture) {
2187 SkASSERT(texture);
2188
2189 // If we created a rt/tex and rendered to it without using a texture and now we're texturing
2190 // from the rt it will still be the last bound texture, but it needs resolving. So keep this
2191 // out of the "last != next" check.
2192 GrGLRenderTarget* texRT = static_cast<GrGLRenderTarget*>(texture->asRenderTarget());
2193 if (texRT) {
2194 this->onResolveRenderTarget(texRT);
2195 }
2196
2197 uint32_t textureID = texture->getUniqueID();
2198 if (fHWBoundTextureUniqueIDs[unitIdx] != textureID) {
2199 this->setTextureUnit(unitIdx);
2200 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, texture->textureID()));
2201 fHWBoundTextureUniqueIDs[unitIdx] = textureID;
2202 }
2203
2204 ResetTimestamp timestamp;
2205 const GrGLTexture::TexParams& oldTexParams = texture->getCachedTexParams(×tamp);
2206 bool setAll = timestamp < this->getResetTimestamp();
2207 GrGLTexture::TexParams newTexParams;
2208
2209 static GrGLenum glMinFilterModes[] = {
2210 GR_GL_NEAREST,
2211 GR_GL_LINEAR,
2212 GR_GL_LINEAR_MIPMAP_LINEAR
2213 };
2214 static GrGLenum glMagFilterModes[] = {
2215 GR_GL_NEAREST,
2216 GR_GL_LINEAR,
2217 GR_GL_LINEAR
2218 };
2219 GrTextureParams::FilterMode filterMode = params.filterMode();
2220
2221 if (GrTextureParams::kMipMap_FilterMode == filterMode) {
2222 if (!this->caps()->mipMapSupport() || GrPixelConfigIsCompressed(texture->config())) {
2223 filterMode = GrTextureParams::kBilerp_FilterMode;
2224 }
2225 }
2226
2227 newTexParams.fMinFilter = glMinFilterModes[filterMode];
2228 newTexParams.fMagFilter = glMagFilterModes[filterMode];
2229
2230 if (GrTextureParams::kMipMap_FilterMode == filterMode &&
2231 texture->texturePriv().mipMapsAreDirty()) {
2232 GL_CALL(GenerateMipmap(GR_GL_TEXTURE_2D));
2233 texture->texturePriv().dirtyMipMaps(false);
2234 }
2235
2236 newTexParams.fWrapS = tile_to_gl_wrap(params.getTileModeX());
2237 newTexParams.fWrapT = tile_to_gl_wrap(params.getTileModeY());
2238 memcpy(newTexParams.fSwizzleRGBA,
2239 GrGLShaderBuilder::GetTexParamSwizzle(texture->config(), this->glCaps()),
2240 sizeof(newTexParams.fSwizzleRGBA));
2241 if (setAll || newTexParams.fMagFilter != oldTexParams.fMagFilter) {
2242 this->setTextureUnit(unitIdx);
2243 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2244 GR_GL_TEXTURE_MAG_FILTER,
2245 newTexParams.fMagFilter));
2246 }
2247 if (setAll || newTexParams.fMinFilter != oldTexParams.fMinFilter) {
2248 this->setTextureUnit(unitIdx);
2249 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2250 GR_GL_TEXTURE_MIN_FILTER,
2251 newTexParams.fMinFilter));
2252 }
2253 if (setAll || newTexParams.fWrapS != oldTexParams.fWrapS) {
2254 this->setTextureUnit(unitIdx);
2255 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2256 GR_GL_TEXTURE_WRAP_S,
2257 newTexParams.fWrapS));
2258 }
2259 if (setAll || newTexParams.fWrapT != oldTexParams.fWrapT) {
2260 this->setTextureUnit(unitIdx);
2261 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
2262 GR_GL_TEXTURE_WRAP_T,
2263 newTexParams.fWrapT));
2264 }
2265 if (this->glCaps().textureSwizzleSupport() &&
2266 (setAll || memcmp(newTexParams.fSwizzleRGBA,
2267 oldTexParams.fSwizzleRGBA,
2268 sizeof(newTexParams.fSwizzleRGBA)))) {
2269 this->setTextureUnit(unitIdx);
2270 if (this->glStandard() == kGLES_GrGLStandard) {
2271 // ES3 added swizzle support but not GL_TEXTURE_SWIZZLE_RGBA.
2272 const GrGLenum* swizzle = newTexParams.fSwizzleRGBA;
2273 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_R, swizzle[0]));
2274 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_G, swizzle[1]));
2275 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_B, swizzle[2]));
2276 GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_A, swizzle[3]));
2277 } else {
2278 GR_STATIC_ASSERT(sizeof(newTexParams.fSwizzleRGBA[0]) == sizeof(GrGLint));
2279 const GrGLint* swizzle = reinterpret_cast<const GrGLint*>(newTexParams.fSwizzleRGBA);
2280 GL_CALL(TexParameteriv(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_RGBA, swizzle));
2281 }
2282 }
2283 texture->setCachedTexParams(newTexParams, this->getResetTimestamp());
2284 }
2285
flushDither(bool dither)2286 void GrGLGpu::flushDither(bool dither) {
2287 if (dither) {
2288 if (kYes_TriState != fHWDitherEnabled) {
2289 GL_CALL(Enable(GR_GL_DITHER));
2290 fHWDitherEnabled = kYes_TriState;
2291 }
2292 } else {
2293 if (kNo_TriState != fHWDitherEnabled) {
2294 GL_CALL(Disable(GR_GL_DITHER));
2295 fHWDitherEnabled = kNo_TriState;
2296 }
2297 }
2298 }
2299
flushColorWrite(bool writeColor)2300 void GrGLGpu::flushColorWrite(bool writeColor) {
2301 if (!writeColor) {
2302 if (kNo_TriState != fHWWriteToColor) {
2303 GL_CALL(ColorMask(GR_GL_FALSE, GR_GL_FALSE,
2304 GR_GL_FALSE, GR_GL_FALSE));
2305 fHWWriteToColor = kNo_TriState;
2306 }
2307 } else {
2308 if (kYes_TriState != fHWWriteToColor) {
2309 GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
2310 fHWWriteToColor = kYes_TriState;
2311 }
2312 }
2313 }
2314
flushDrawFace(GrPipelineBuilder::DrawFace face)2315 void GrGLGpu::flushDrawFace(GrPipelineBuilder::DrawFace face) {
2316 if (fHWDrawFace != face) {
2317 switch (face) {
2318 case GrPipelineBuilder::kCCW_DrawFace:
2319 GL_CALL(Enable(GR_GL_CULL_FACE));
2320 GL_CALL(CullFace(GR_GL_BACK));
2321 break;
2322 case GrPipelineBuilder::kCW_DrawFace:
2323 GL_CALL(Enable(GR_GL_CULL_FACE));
2324 GL_CALL(CullFace(GR_GL_FRONT));
2325 break;
2326 case GrPipelineBuilder::kBoth_DrawFace:
2327 GL_CALL(Disable(GR_GL_CULL_FACE));
2328 break;
2329 default:
2330 SkFAIL("Unknown draw face.");
2331 }
2332 fHWDrawFace = face;
2333 }
2334 }
2335
configToGLFormats(GrPixelConfig config,bool getSizedInternalFormat,GrGLenum * internalFormat,GrGLenum * externalFormat,GrGLenum * externalType)2336 bool GrGLGpu::configToGLFormats(GrPixelConfig config,
2337 bool getSizedInternalFormat,
2338 GrGLenum* internalFormat,
2339 GrGLenum* externalFormat,
2340 GrGLenum* externalType) {
2341 GrGLenum dontCare;
2342 if (NULL == internalFormat) {
2343 internalFormat = &dontCare;
2344 }
2345 if (NULL == externalFormat) {
2346 externalFormat = &dontCare;
2347 }
2348 if (NULL == externalType) {
2349 externalType = &dontCare;
2350 }
2351
2352 if(!this->glCaps().isConfigTexturable(config)) {
2353 return false;
2354 }
2355
2356 switch (config) {
2357 case kRGBA_8888_GrPixelConfig:
2358 *internalFormat = GR_GL_RGBA;
2359 *externalFormat = GR_GL_RGBA;
2360 if (getSizedInternalFormat) {
2361 *internalFormat = GR_GL_RGBA8;
2362 } else {
2363 *internalFormat = GR_GL_RGBA;
2364 }
2365 *externalType = GR_GL_UNSIGNED_BYTE;
2366 break;
2367 case kBGRA_8888_GrPixelConfig:
2368 if (this->glCaps().bgraIsInternalFormat()) {
2369 if (getSizedInternalFormat) {
2370 *internalFormat = GR_GL_BGRA8;
2371 } else {
2372 *internalFormat = GR_GL_BGRA;
2373 }
2374 } else {
2375 if (getSizedInternalFormat) {
2376 *internalFormat = GR_GL_RGBA8;
2377 } else {
2378 *internalFormat = GR_GL_RGBA;
2379 }
2380 }
2381 *externalFormat = GR_GL_BGRA;
2382 *externalType = GR_GL_UNSIGNED_BYTE;
2383 break;
2384 case kSRGBA_8888_GrPixelConfig:
2385 *internalFormat = GR_GL_SRGB_ALPHA;
2386 *externalFormat = GR_GL_SRGB_ALPHA;
2387 if (getSizedInternalFormat) {
2388 *internalFormat = GR_GL_SRGB8_ALPHA8;
2389 } else {
2390 *internalFormat = GR_GL_SRGB_ALPHA;
2391 }
2392 *externalType = GR_GL_UNSIGNED_BYTE;
2393 break;
2394 case kRGB_565_GrPixelConfig:
2395 *internalFormat = GR_GL_RGB;
2396 *externalFormat = GR_GL_RGB;
2397 if (getSizedInternalFormat) {
2398 if (!this->glCaps().ES2CompatibilitySupport()) {
2399 *internalFormat = GR_GL_RGB5;
2400 } else {
2401 *internalFormat = GR_GL_RGB565;
2402 }
2403 } else {
2404 *internalFormat = GR_GL_RGB;
2405 }
2406 *externalType = GR_GL_UNSIGNED_SHORT_5_6_5;
2407 break;
2408 case kRGBA_4444_GrPixelConfig:
2409 *internalFormat = GR_GL_RGBA;
2410 *externalFormat = GR_GL_RGBA;
2411 if (getSizedInternalFormat) {
2412 *internalFormat = GR_GL_RGBA4;
2413 } else {
2414 *internalFormat = GR_GL_RGBA;
2415 }
2416 *externalType = GR_GL_UNSIGNED_SHORT_4_4_4_4;
2417 break;
2418 case kIndex_8_GrPixelConfig:
2419 // no sized/unsized internal format distinction here
2420 *internalFormat = GR_GL_PALETTE8_RGBA8;
2421 break;
2422 case kAlpha_8_GrPixelConfig:
2423 if (this->glCaps().textureRedSupport()) {
2424 *internalFormat = GR_GL_RED;
2425 *externalFormat = GR_GL_RED;
2426 if (getSizedInternalFormat) {
2427 *internalFormat = GR_GL_R8;
2428 } else {
2429 *internalFormat = GR_GL_RED;
2430 }
2431 *externalType = GR_GL_UNSIGNED_BYTE;
2432 } else {
2433 *internalFormat = GR_GL_ALPHA;
2434 *externalFormat = GR_GL_ALPHA;
2435 if (getSizedInternalFormat) {
2436 *internalFormat = GR_GL_ALPHA8;
2437 } else {
2438 *internalFormat = GR_GL_ALPHA;
2439 }
2440 *externalType = GR_GL_UNSIGNED_BYTE;
2441 }
2442 break;
2443 case kETC1_GrPixelConfig:
2444 *internalFormat = GR_GL_COMPRESSED_ETC1_RGB8;
2445 break;
2446 case kLATC_GrPixelConfig:
2447 switch(this->glCaps().latcAlias()) {
2448 case GrGLCaps::kLATC_LATCAlias:
2449 *internalFormat = GR_GL_COMPRESSED_LUMINANCE_LATC1;
2450 break;
2451 case GrGLCaps::kRGTC_LATCAlias:
2452 *internalFormat = GR_GL_COMPRESSED_RED_RGTC1;
2453 break;
2454 case GrGLCaps::k3DC_LATCAlias:
2455 *internalFormat = GR_GL_COMPRESSED_3DC_X;
2456 break;
2457 }
2458 break;
2459 case kR11_EAC_GrPixelConfig:
2460 *internalFormat = GR_GL_COMPRESSED_R11_EAC;
2461 break;
2462
2463 case kASTC_12x12_GrPixelConfig:
2464 *internalFormat = GR_GL_COMPRESSED_RGBA_ASTC_12x12_KHR;
2465 break;
2466
2467 case kRGBA_float_GrPixelConfig:
2468 *internalFormat = GR_GL_RGBA32F;
2469 *externalFormat = GR_GL_RGBA;
2470 *externalType = GR_GL_FLOAT;
2471 break;
2472
2473 case kAlpha_half_GrPixelConfig:
2474 if (this->glCaps().textureRedSupport()) {
2475 if (getSizedInternalFormat) {
2476 *internalFormat = GR_GL_R16F;
2477 } else {
2478 *internalFormat = GR_GL_RED;
2479 }
2480 *externalFormat = GR_GL_RED;
2481 } else {
2482 if (getSizedInternalFormat) {
2483 *internalFormat = GR_GL_ALPHA16F;
2484 } else {
2485 *internalFormat = GR_GL_ALPHA;
2486 }
2487 *externalFormat = GR_GL_ALPHA;
2488 }
2489 if (kGL_GrGLStandard == this->glStandard() || this->glVersion() >= GR_GL_VER(3, 0)) {
2490 *externalType = GR_GL_HALF_FLOAT;
2491 } else {
2492 *externalType = GR_GL_HALF_FLOAT_OES;
2493 }
2494 break;
2495
2496 default:
2497 return false;
2498 }
2499 return true;
2500 }
2501
setTextureUnit(int unit)2502 void GrGLGpu::setTextureUnit(int unit) {
2503 SkASSERT(unit >= 0 && unit < fHWBoundTextureUniqueIDs.count());
2504 if (unit != fHWActiveTextureUnitIdx) {
2505 GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + unit));
2506 fHWActiveTextureUnitIdx = unit;
2507 }
2508 }
2509
setScratchTextureUnit()2510 void GrGLGpu::setScratchTextureUnit() {
2511 // Bind the last texture unit since it is the least likely to be used by GrGLProgram.
2512 int lastUnitIdx = fHWBoundTextureUniqueIDs.count() - 1;
2513 if (lastUnitIdx != fHWActiveTextureUnitIdx) {
2514 GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + lastUnitIdx));
2515 fHWActiveTextureUnitIdx = lastUnitIdx;
2516 }
2517 // clear out the this field so that if a program does use this unit it will rebind the correct
2518 // texture.
2519 fHWBoundTextureUniqueIDs[lastUnitIdx] = SK_InvalidUniqueID;
2520 }
2521
2522 namespace {
2523 // Determines whether glBlitFramebuffer could be used between src and dst.
can_blit_framebuffer(const GrSurface * dst,const GrSurface * src,const GrGLGpu * gpu)2524 inline bool can_blit_framebuffer(const GrSurface* dst,
2525 const GrSurface* src,
2526 const GrGLGpu* gpu) {
2527 if (gpu->glCaps().isConfigRenderable(dst->config(), dst->desc().fSampleCnt > 0) &&
2528 gpu->glCaps().isConfigRenderable(src->config(), src->desc().fSampleCnt > 0) &&
2529 gpu->glCaps().usesMSAARenderBuffers()) {
2530 // ES3 doesn't allow framebuffer blits when the src has MSAA and the configs don't match
2531 // or the rects are not the same (not just the same size but have the same edges).
2532 if (GrGLCaps::kES_3_0_MSFBOType == gpu->glCaps().msFBOType() &&
2533 (src->desc().fSampleCnt > 0 || src->config() != dst->config())) {
2534 return false;
2535 }
2536 return true;
2537 } else {
2538 return false;
2539 }
2540 }
2541
can_copy_texsubimage(const GrSurface * dst,const GrSurface * src,const GrGLGpu * gpu)2542 inline bool can_copy_texsubimage(const GrSurface* dst,
2543 const GrSurface* src,
2544 const GrGLGpu* gpu) {
2545 // Table 3.9 of the ES2 spec indicates the supported formats with CopyTexSubImage
2546 // and BGRA isn't in the spec. There doesn't appear to be any extension that adds it. Perhaps
2547 // many drivers would allow it to work, but ANGLE does not.
2548 if (kGLES_GrGLStandard == gpu->glStandard() && gpu->glCaps().bgraIsInternalFormat() &&
2549 (kBGRA_8888_GrPixelConfig == dst->config() || kBGRA_8888_GrPixelConfig == src->config())) {
2550 return false;
2551 }
2552 const GrGLRenderTarget* dstRT = static_cast<const GrGLRenderTarget*>(dst->asRenderTarget());
2553 // If dst is multisampled (and uses an extension where there is a separate MSAA renderbuffer)
2554 // then we don't want to copy to the texture but to the MSAA buffer.
2555 if (dstRT && dstRT->renderFBOID() != dstRT->textureFBOID()) {
2556 return false;
2557 }
2558 const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
2559 // If the src is multisampled (and uses an extension where there is a separate MSAA
2560 // renderbuffer) then it is an invalid operation to call CopyTexSubImage
2561 if (srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
2562 return false;
2563 }
2564 if (gpu->glCaps().isConfigRenderable(src->config(), src->desc().fSampleCnt > 0) &&
2565 dst->asTexture() &&
2566 dst->origin() == src->origin() &&
2567 !GrPixelConfigIsCompressed(src->config())) {
2568 return true;
2569 } else {
2570 return false;
2571 }
2572 }
2573
2574 }
2575
2576 // If a temporary FBO was created, its non-zero ID is returned. The viewport that the copy rect is
2577 // relative to is output.
bindSurfaceAsFBO(GrSurface * surface,GrGLenum fboTarget,GrGLIRect * viewport,TempFBOTarget tempFBOTarget)2578 GrGLuint GrGLGpu::bindSurfaceAsFBO(GrSurface* surface, GrGLenum fboTarget, GrGLIRect* viewport,
2579 TempFBOTarget tempFBOTarget) {
2580 GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(surface->asRenderTarget());
2581 if (NULL == rt) {
2582 SkASSERT(surface->asTexture());
2583 GrGLuint texID = static_cast<GrGLTexture*>(surface->asTexture())->textureID();
2584 GrGLuint* tempFBOID;
2585 tempFBOID = kSrc_TempFBOTarget == tempFBOTarget ? &fTempSrcFBOID : &fTempDstFBOID;
2586
2587 if (0 == *tempFBOID) {
2588 GR_GL_CALL(this->glInterface(), GenFramebuffers(1, tempFBOID));
2589 }
2590
2591 fStats.incRenderTargetBinds();
2592 GR_GL_CALL(this->glInterface(), BindFramebuffer(fboTarget, *tempFBOID));
2593 GR_GL_CALL(this->glInterface(), FramebufferTexture2D(fboTarget,
2594 GR_GL_COLOR_ATTACHMENT0,
2595 GR_GL_TEXTURE_2D,
2596 texID,
2597 0));
2598 viewport->fLeft = 0;
2599 viewport->fBottom = 0;
2600 viewport->fWidth = surface->width();
2601 viewport->fHeight = surface->height();
2602 return *tempFBOID;
2603 } else {
2604 GrGLuint tempFBOID = 0;
2605 fStats.incRenderTargetBinds();
2606 GR_GL_CALL(this->glInterface(), BindFramebuffer(fboTarget, rt->renderFBOID()));
2607 *viewport = rt->getViewport();
2608 return tempFBOID;
2609 }
2610 }
2611
unbindTextureFromFBO(GrGLenum fboTarget)2612 void GrGLGpu::unbindTextureFromFBO(GrGLenum fboTarget) {
2613 GR_GL_CALL(this->glInterface(), FramebufferTexture2D(fboTarget,
2614 GR_GL_COLOR_ATTACHMENT0,
2615 GR_GL_TEXTURE_2D,
2616 0,
2617 0));
2618 }
2619
initCopySurfaceDstDesc(const GrSurface * src,GrSurfaceDesc * desc)2620 bool GrGLGpu::initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) {
2621 // In here we look for opportunities to use CopyTexSubImage, or fbo blit. If neither are
2622 // possible and we return false to fallback to creating a render target dst for render-to-
2623 // texture. This code prefers CopyTexSubImage to fbo blit and avoids triggering temporary fbo
2624 // creation. It isn't clear that avoiding temporary fbo creation is actually optimal.
2625
2626 // Check for format issues with glCopyTexSubImage2D
2627 if (kGLES_GrGLStandard == this->glStandard() && this->glCaps().bgraIsInternalFormat() &&
2628 kBGRA_8888_GrPixelConfig == src->config()) {
2629 // glCopyTexSubImage2D doesn't work with this config. If the bgra can be used with fbo blit
2630 // then we set up for that, otherwise fail.
2631 if (this->caps()->isConfigRenderable(kBGRA_8888_GrPixelConfig, false)) {
2632 desc->fOrigin = kDefault_GrSurfaceOrigin;
2633 desc->fFlags = kRenderTarget_GrSurfaceFlag;
2634 desc->fConfig = kBGRA_8888_GrPixelConfig;
2635 return true;
2636 }
2637 return false;
2638 } else if (NULL == src->asRenderTarget()) {
2639 // CopyTexSubImage2D or fbo blit would require creating a temp fbo for the src.
2640 return false;
2641 }
2642
2643 const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
2644 if (srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
2645 // It's illegal to call CopyTexSubImage2D on a MSAA renderbuffer. Set up for FBO blit or
2646 // fail.
2647 if (this->caps()->isConfigRenderable(src->config(), false)) {
2648 desc->fOrigin = kDefault_GrSurfaceOrigin;
2649 desc->fFlags = kRenderTarget_GrSurfaceFlag;
2650 desc->fConfig = src->config();
2651 return true;
2652 }
2653 return false;
2654 }
2655
2656 // We'll do a CopyTexSubImage. Make the dst a plain old texture.
2657 desc->fConfig = src->config();
2658 desc->fOrigin = src->origin();
2659 desc->fFlags = kNone_GrSurfaceFlags;
2660 return true;
2661 }
2662
copySurface(GrSurface * dst,GrSurface * src,const SkIRect & srcRect,const SkIPoint & dstPoint)2663 bool GrGLGpu::copySurface(GrSurface* dst,
2664 GrSurface* src,
2665 const SkIRect& srcRect,
2666 const SkIPoint& dstPoint) {
2667 bool copied = false;
2668 if (can_copy_texsubimage(dst, src, this)) {
2669 GrGLuint srcFBO;
2670 GrGLIRect srcVP;
2671 srcFBO = this->bindSurfaceAsFBO(src, GR_GL_FRAMEBUFFER, &srcVP, kSrc_TempFBOTarget);
2672 GrGLTexture* dstTex = static_cast<GrGLTexture*>(dst->asTexture());
2673 SkASSERT(dstTex);
2674 // We modified the bound FBO
2675 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
2676 GrGLIRect srcGLRect;
2677 srcGLRect.setRelativeTo(srcVP,
2678 srcRect.fLeft,
2679 srcRect.fTop,
2680 srcRect.width(),
2681 srcRect.height(),
2682 src->origin());
2683
2684 this->setScratchTextureUnit();
2685 GL_CALL(BindTexture(GR_GL_TEXTURE_2D, dstTex->textureID()));
2686 GrGLint dstY;
2687 if (kBottomLeft_GrSurfaceOrigin == dst->origin()) {
2688 dstY = dst->height() - (dstPoint.fY + srcGLRect.fHeight);
2689 } else {
2690 dstY = dstPoint.fY;
2691 }
2692 GL_CALL(CopyTexSubImage2D(GR_GL_TEXTURE_2D, 0,
2693 dstPoint.fX, dstY,
2694 srcGLRect.fLeft, srcGLRect.fBottom,
2695 srcGLRect.fWidth, srcGLRect.fHeight));
2696 copied = true;
2697 if (srcFBO) {
2698 this->unbindTextureFromFBO(GR_GL_FRAMEBUFFER);
2699 }
2700 } else if (can_blit_framebuffer(dst, src, this)) {
2701 SkIRect dstRect = SkIRect::MakeXYWH(dstPoint.fX, dstPoint.fY,
2702 srcRect.width(), srcRect.height());
2703 bool selfOverlap = false;
2704 if (dst == src) {
2705 selfOverlap = SkIRect::IntersectsNoEmptyCheck(dstRect, srcRect);
2706 }
2707
2708 if (!selfOverlap) {
2709 GrGLuint dstFBO;
2710 GrGLuint srcFBO;
2711 GrGLIRect dstVP;
2712 GrGLIRect srcVP;
2713 dstFBO = this->bindSurfaceAsFBO(dst, GR_GL_DRAW_FRAMEBUFFER, &dstVP,
2714 kDst_TempFBOTarget);
2715 srcFBO = this->bindSurfaceAsFBO(src, GR_GL_READ_FRAMEBUFFER, &srcVP,
2716 kSrc_TempFBOTarget);
2717 // We modified the bound FBO
2718 fHWBoundRenderTargetUniqueID = SK_InvalidUniqueID;
2719 GrGLIRect srcGLRect;
2720 GrGLIRect dstGLRect;
2721 srcGLRect.setRelativeTo(srcVP,
2722 srcRect.fLeft,
2723 srcRect.fTop,
2724 srcRect.width(),
2725 srcRect.height(),
2726 src->origin());
2727 dstGLRect.setRelativeTo(dstVP,
2728 dstRect.fLeft,
2729 dstRect.fTop,
2730 dstRect.width(),
2731 dstRect.height(),
2732 dst->origin());
2733
2734 // BlitFrameBuffer respects the scissor, so disable it.
2735 this->disableScissor();
2736
2737 GrGLint srcY0;
2738 GrGLint srcY1;
2739 // Does the blit need to y-mirror or not?
2740 if (src->origin() == dst->origin()) {
2741 srcY0 = srcGLRect.fBottom;
2742 srcY1 = srcGLRect.fBottom + srcGLRect.fHeight;
2743 } else {
2744 srcY0 = srcGLRect.fBottom + srcGLRect.fHeight;
2745 srcY1 = srcGLRect.fBottom;
2746 }
2747 GL_CALL(BlitFramebuffer(srcGLRect.fLeft,
2748 srcY0,
2749 srcGLRect.fLeft + srcGLRect.fWidth,
2750 srcY1,
2751 dstGLRect.fLeft,
2752 dstGLRect.fBottom,
2753 dstGLRect.fLeft + dstGLRect.fWidth,
2754 dstGLRect.fBottom + dstGLRect.fHeight,
2755 GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
2756 if (dstFBO) {
2757 this->unbindTextureFromFBO(GR_GL_DRAW_FRAMEBUFFER);
2758 }
2759 if (srcFBO) {
2760 this->unbindTextureFromFBO(GR_GL_READ_FRAMEBUFFER);
2761 }
2762 copied = true;
2763 }
2764 }
2765 return copied;
2766 }
2767
canCopySurface(const GrSurface * dst,const GrSurface * src,const SkIRect & srcRect,const SkIPoint & dstPoint)2768 bool GrGLGpu::canCopySurface(const GrSurface* dst,
2769 const GrSurface* src,
2770 const SkIRect& srcRect,
2771 const SkIPoint& dstPoint) {
2772 // This mirrors the logic in onCopySurface.
2773 if (can_copy_texsubimage(dst, src, this)) {
2774 return true;
2775 }
2776 if (can_blit_framebuffer(dst, src, this)) {
2777 if (dst == src) {
2778 SkIRect dstRect = SkIRect::MakeXYWH(dstPoint.fX, dstPoint.fY,
2779 srcRect.width(), srcRect.height());
2780 if(!SkIRect::IntersectsNoEmptyCheck(dstRect, srcRect)) {
2781 return true;
2782 }
2783 } else {
2784 return true;
2785 }
2786 }
2787 return false;
2788 }
2789
xferBarrier(GrRenderTarget * rt,GrXferBarrierType type)2790 void GrGLGpu::xferBarrier(GrRenderTarget* rt, GrXferBarrierType type) {
2791 switch (type) {
2792 case kTexture_GrXferBarrierType: {
2793 GrGLRenderTarget* glrt = static_cast<GrGLRenderTarget*>(rt);
2794 if (glrt->textureFBOID() != glrt->renderFBOID()) {
2795 // The render target uses separate storage so no need for glTextureBarrier.
2796 // FIXME: The render target will resolve automatically when its texture is bound,
2797 // but we could resolve only the bounds that will be read if we do it here instead.
2798 return;
2799 }
2800 SkASSERT(this->caps()->textureBarrierSupport());
2801 GL_CALL(TextureBarrier());
2802 return;
2803 }
2804 case kBlend_GrXferBarrierType:
2805 SkASSERT(GrDrawTargetCaps::kAdvanced_BlendEquationSupport ==
2806 this->caps()->blendEquationSupport());
2807 GL_CALL(BlendBarrier());
2808 return;
2809 }
2810 }
2811
didAddGpuTraceMarker()2812 void GrGLGpu::didAddGpuTraceMarker() {
2813 if (this->caps()->gpuTracingSupport()) {
2814 const GrTraceMarkerSet& markerArray = this->getActiveTraceMarkers();
2815 SkString markerString = markerArray.toStringLast();
2816 #if GR_FORCE_GPU_TRACE_DEBUGGING
2817 SkDebugf("%s\n", markerString.c_str());
2818 #else
2819 GL_CALL(PushGroupMarker(0, markerString.c_str()));
2820 #endif
2821 }
2822 }
2823
didRemoveGpuTraceMarker()2824 void GrGLGpu::didRemoveGpuTraceMarker() {
2825 if (this->caps()->gpuTracingSupport()) {
2826 #if GR_FORCE_GPU_TRACE_DEBUGGING
2827 SkDebugf("Pop trace marker.\n");
2828 #else
2829 GL_CALL(PopGroupMarker());
2830 #endif
2831 }
2832 }
2833
2834 ///////////////////////////////////////////////////////////////////////////////
2835
bindArrayAndBuffersToDraw(GrGLGpu * gpu,const GrGLVertexBuffer * vbuffer,const GrGLIndexBuffer * ibuffer)2836 GrGLAttribArrayState* GrGLGpu::HWGeometryState::bindArrayAndBuffersToDraw(
2837 GrGLGpu* gpu,
2838 const GrGLVertexBuffer* vbuffer,
2839 const GrGLIndexBuffer* ibuffer) {
2840 SkASSERT(vbuffer);
2841 GrGLAttribArrayState* attribState;
2842
2843 // We use a vertex array if we're on a core profile and the verts are in a VBO.
2844 if (gpu->glCaps().isCoreProfile() && !vbuffer->isCPUBacked()) {
2845 if (!fVBOVertexArray) {
2846 GrGLuint arrayID;
2847 GR_GL_CALL(gpu->glInterface(), GenVertexArrays(1, &arrayID));
2848 int attrCount = gpu->glCaps().maxVertexAttributes();
2849 fVBOVertexArray = SkNEW_ARGS(GrGLVertexArray, (arrayID, attrCount));
2850 }
2851 attribState = fVBOVertexArray->bindWithIndexBuffer(gpu, ibuffer);
2852 } else {
2853 if (ibuffer) {
2854 this->setIndexBufferIDOnDefaultVertexArray(gpu, ibuffer->bufferID());
2855 } else {
2856 this->setVertexArrayID(gpu, 0);
2857 }
2858 int attrCount = gpu->glCaps().maxVertexAttributes();
2859 if (fDefaultVertexArrayAttribState.count() != attrCount) {
2860 fDefaultVertexArrayAttribState.resize(attrCount);
2861 }
2862 attribState = &fDefaultVertexArrayAttribState;
2863 }
2864 return attribState;
2865 }
2866