GrDrawTarget.cpp revision ca0a1799ffdceb4ccd998468566f39abac2f0b55 
1
2/*
3 * Copyright 2010 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10
11#include "GrDrawTarget.h"
12#include "GrContext.h"
13#include "GrDrawTargetCaps.h"
14#include "GrPath.h"
15#include "GrRenderTarget.h"
16#include "GrSurfacePriv.h"
17#include "GrTemplates.h"
18#include "GrTexture.h"
19#include "GrVertexBuffer.h"
20
21#include "SkStrokeRec.h"
22
23////////////////////////////////////////////////////////////////////////////////
24
25GrDrawTarget::DrawInfo& GrDrawTarget::DrawInfo::operator =(const DrawInfo& di) {
26    fPrimitiveType  = di.fPrimitiveType;
27    fStartVertex    = di.fStartVertex;
28    fStartIndex     = di.fStartIndex;
29    fVertexCount    = di.fVertexCount;
30    fIndexCount     = di.fIndexCount;
31
32    fInstanceCount          = di.fInstanceCount;
33    fVerticesPerInstance    = di.fVerticesPerInstance;
34    fIndicesPerInstance     = di.fIndicesPerInstance;
35
36    if (di.fDevBounds) {
37        SkASSERT(di.fDevBounds == &di.fDevBoundsStorage);
38        fDevBoundsStorage = di.fDevBoundsStorage;
39        fDevBounds = &fDevBoundsStorage;
40    } else {
41        fDevBounds = NULL;
42    }
43
44    this->setVertexBuffer(di.vertexBuffer());
45    this->setIndexBuffer(di.indexBuffer());
46
47    return *this;
48}
49
50#ifdef SK_DEBUG
51bool GrDrawTarget::DrawInfo::isInstanced() const {
52    if (fInstanceCount > 0) {
53        SkASSERT(0 == fIndexCount % fIndicesPerInstance);
54        SkASSERT(0 == fVertexCount % fVerticesPerInstance);
55        SkASSERT(fIndexCount / fIndicesPerInstance == fInstanceCount);
56        SkASSERT(fVertexCount / fVerticesPerInstance == fInstanceCount);
57        // there is no way to specify a non-zero start index to drawIndexedInstances().
58        SkASSERT(0 == fStartIndex);
59        return true;
60    } else {
61        SkASSERT(!fVerticesPerInstance);
62        SkASSERT(!fIndicesPerInstance);
63        return false;
64    }
65}
66#endif
67
68void GrDrawTarget::DrawInfo::adjustInstanceCount(int instanceOffset) {
69    SkASSERT(this->isInstanced());
70    SkASSERT(instanceOffset + fInstanceCount >= 0);
71    fInstanceCount += instanceOffset;
72    fVertexCount = fVerticesPerInstance * fInstanceCount;
73    fIndexCount = fIndicesPerInstance * fInstanceCount;
74}
75
76void GrDrawTarget::DrawInfo::adjustStartVertex(int vertexOffset) {
77    fStartVertex += vertexOffset;
78    SkASSERT(fStartVertex >= 0);
79}
80
81void GrDrawTarget::DrawInfo::adjustStartIndex(int indexOffset) {
82    SkASSERT(this->isIndexed());
83    fStartIndex += indexOffset;
84    SkASSERT(fStartIndex >= 0);
85}
86
87////////////////////////////////////////////////////////////////////////////////
88
89#define DEBUG_INVAL_BUFFER 0xdeadcafe
90#define DEBUG_INVAL_START_IDX -1
91
92GrDrawTarget::GrDrawTarget(GrContext* context)
93    : fClip(NULL)
94    , fContext(context)
95    , fGpuTraceMarkerCount(0) {
96    SkASSERT(context);
97    GeometrySrcState& geoSrc = fGeoSrcStateStack.push_back();
98#ifdef SK_DEBUG
99    geoSrc.fVertexCount = DEBUG_INVAL_START_IDX;
100    geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER;
101    geoSrc.fIndexCount = DEBUG_INVAL_START_IDX;
102    geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER;
103#endif
104    geoSrc.fVertexSrc = kNone_GeometrySrcType;
105    geoSrc.fIndexSrc  = kNone_GeometrySrcType;
106}
107
108GrDrawTarget::~GrDrawTarget() {
109    SkASSERT(1 == fGeoSrcStateStack.count());
110    SkDEBUGCODE(GeometrySrcState& geoSrc = fGeoSrcStateStack.back());
111    SkASSERT(kNone_GeometrySrcType == geoSrc.fIndexSrc);
112    SkASSERT(kNone_GeometrySrcType == geoSrc.fVertexSrc);
113}
114
115void GrDrawTarget::releaseGeometry() {
116    int popCnt = fGeoSrcStateStack.count() - 1;
117    while (popCnt) {
118        this->popGeometrySource();
119        --popCnt;
120    }
121    this->resetVertexSource();
122    this->resetIndexSource();
123}
124
125void GrDrawTarget::setClip(const GrClipData* clip) {
126    fClip = clip;
127}
128
129const GrClipData* GrDrawTarget::getClip() const {
130    return fClip;
131}
132
133bool GrDrawTarget::reserveVertexSpace(size_t vertexSize,
134                                      int vertexCount,
135                                      void** vertices) {
136    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
137    bool acquired = false;
138    if (vertexCount > 0) {
139        SkASSERT(vertices);
140        this->releasePreviousVertexSource();
141        geoSrc.fVertexSrc = kNone_GeometrySrcType;
142
143        acquired = this->onReserveVertexSpace(vertexSize,
144                                              vertexCount,
145                                              vertices);
146    }
147    if (acquired) {
148        geoSrc.fVertexSrc = kReserved_GeometrySrcType;
149        geoSrc.fVertexCount = vertexCount;
150        geoSrc.fVertexSize = vertexSize;
151    } else if (vertices) {
152        *vertices = NULL;
153    }
154    return acquired;
155}
156
157bool GrDrawTarget::reserveIndexSpace(int indexCount,
158                                     void** indices) {
159    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
160    bool acquired = false;
161    if (indexCount > 0) {
162        SkASSERT(indices);
163        this->releasePreviousIndexSource();
164        geoSrc.fIndexSrc = kNone_GeometrySrcType;
165
166        acquired = this->onReserveIndexSpace(indexCount, indices);
167    }
168    if (acquired) {
169        geoSrc.fIndexSrc = kReserved_GeometrySrcType;
170        geoSrc.fIndexCount = indexCount;
171    } else if (indices) {
172        *indices = NULL;
173    }
174    return acquired;
175
176}
177
178bool GrDrawTarget::reserveVertexAndIndexSpace(int vertexCount,
179                                              size_t vertexStride,
180                                              int indexCount,
181                                              void** vertices,
182                                              void** indices) {
183    this->willReserveVertexAndIndexSpace(vertexCount, vertexStride, indexCount);
184    if (vertexCount) {
185        if (!this->reserveVertexSpace(vertexStride, vertexCount, vertices)) {
186            if (indexCount) {
187                this->resetIndexSource();
188            }
189            return false;
190        }
191    }
192    if (indexCount) {
193        if (!this->reserveIndexSpace(indexCount, indices)) {
194            if (vertexCount) {
195                this->resetVertexSource();
196            }
197            return false;
198        }
199    }
200    return true;
201}
202
203bool GrDrawTarget::geometryHints(size_t vertexStride,
204                                 int32_t* vertexCount,
205                                 int32_t* indexCount) const {
206    if (vertexCount) {
207        *vertexCount = -1;
208    }
209    if (indexCount) {
210        *indexCount = -1;
211    }
212    return false;
213}
214
215void GrDrawTarget::releasePreviousVertexSource() {
216    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
217    switch (geoSrc.fVertexSrc) {
218        case kNone_GeometrySrcType:
219            break;
220        case kReserved_GeometrySrcType:
221            this->releaseReservedVertexSpace();
222            break;
223        case kBuffer_GeometrySrcType:
224            geoSrc.fVertexBuffer->unref();
225#ifdef SK_DEBUG
226            geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER;
227#endif
228            break;
229        default:
230            SkFAIL("Unknown Vertex Source Type.");
231            break;
232    }
233}
234
235void GrDrawTarget::releasePreviousIndexSource() {
236    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
237    switch (geoSrc.fIndexSrc) {
238        case kNone_GeometrySrcType:   // these two don't require
239            break;
240        case kReserved_GeometrySrcType:
241            this->releaseReservedIndexSpace();
242            break;
243        case kBuffer_GeometrySrcType:
244            geoSrc.fIndexBuffer->unref();
245#ifdef SK_DEBUG
246            geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER;
247#endif
248            break;
249        default:
250            SkFAIL("Unknown Index Source Type.");
251            break;
252    }
253}
254
255void GrDrawTarget::setVertexSourceToBuffer(const GrVertexBuffer* buffer, size_t vertexStride) {
256    this->releasePreviousVertexSource();
257    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
258    geoSrc.fVertexSrc    = kBuffer_GeometrySrcType;
259    geoSrc.fVertexBuffer = buffer;
260    buffer->ref();
261    geoSrc.fVertexSize = vertexStride;
262}
263
264void GrDrawTarget::setIndexSourceToBuffer(const GrIndexBuffer* buffer) {
265    this->releasePreviousIndexSource();
266    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
267    geoSrc.fIndexSrc     = kBuffer_GeometrySrcType;
268    geoSrc.fIndexBuffer  = buffer;
269    buffer->ref();
270}
271
272void GrDrawTarget::resetVertexSource() {
273    this->releasePreviousVertexSource();
274    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
275    geoSrc.fVertexSrc = kNone_GeometrySrcType;
276}
277
278void GrDrawTarget::resetIndexSource() {
279    this->releasePreviousIndexSource();
280    GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
281    geoSrc.fIndexSrc = kNone_GeometrySrcType;
282}
283
284void GrDrawTarget::pushGeometrySource() {
285    this->geometrySourceWillPush();
286    GeometrySrcState& newState = fGeoSrcStateStack.push_back();
287    newState.fIndexSrc = kNone_GeometrySrcType;
288    newState.fVertexSrc = kNone_GeometrySrcType;
289#ifdef SK_DEBUG
290    newState.fVertexCount  = ~0;
291    newState.fVertexBuffer = (GrVertexBuffer*)~0;
292    newState.fIndexCount   = ~0;
293    newState.fIndexBuffer = (GrIndexBuffer*)~0;
294#endif
295}
296
297void GrDrawTarget::popGeometrySource() {
298    // if popping last element then pops are unbalanced with pushes
299    SkASSERT(fGeoSrcStateStack.count() > 1);
300
301    this->geometrySourceWillPop(fGeoSrcStateStack.fromBack(1));
302    this->releasePreviousVertexSource();
303    this->releasePreviousIndexSource();
304    fGeoSrcStateStack.pop_back();
305}
306
307////////////////////////////////////////////////////////////////////////////////
308
309bool GrDrawTarget::checkDraw(const GrPipelineBuilder& pipelineBuilder,
310                             const GrGeometryProcessor* gp,
311                             GrPrimitiveType type,
312                             int startVertex,
313                             int startIndex,
314                             int vertexCount,
315                             int indexCount) const {
316#ifdef SK_DEBUG
317    const GeometrySrcState& geoSrc = fGeoSrcStateStack.back();
318    int maxVertex = startVertex + vertexCount;
319    int maxValidVertex;
320    switch (geoSrc.fVertexSrc) {
321        case kNone_GeometrySrcType:
322            SkFAIL("Attempting to draw without vertex src.");
323        case kReserved_GeometrySrcType: // fallthrough
324            maxValidVertex = geoSrc.fVertexCount;
325            break;
326        case kBuffer_GeometrySrcType:
327            maxValidVertex = static_cast<int>(geoSrc.fVertexBuffer->gpuMemorySize() /
328                                              geoSrc.fVertexSize);
329            break;
330    }
331    if (maxVertex > maxValidVertex) {
332        SkFAIL("Drawing outside valid vertex range.");
333    }
334    if (indexCount > 0) {
335        int maxIndex = startIndex + indexCount;
336        int maxValidIndex;
337        switch (geoSrc.fIndexSrc) {
338            case kNone_GeometrySrcType:
339                SkFAIL("Attempting to draw indexed geom without index src.");
340            case kReserved_GeometrySrcType: // fallthrough
341                maxValidIndex = geoSrc.fIndexCount;
342                break;
343            case kBuffer_GeometrySrcType:
344                maxValidIndex = static_cast<int>(geoSrc.fIndexBuffer->gpuMemorySize() /
345                                                 sizeof(uint16_t));
346                break;
347        }
348        if (maxIndex > maxValidIndex) {
349            SkFAIL("Index reads outside valid index range.");
350        }
351    }
352
353    SkASSERT(pipelineBuilder.getRenderTarget());
354
355    if (gp) {
356        int numTextures = gp->numTextures();
357        for (int t = 0; t < numTextures; ++t) {
358            GrTexture* texture = gp->texture(t);
359            SkASSERT(texture->asRenderTarget() != pipelineBuilder.getRenderTarget());
360        }
361    }
362
363    for (int s = 0; s < pipelineBuilder.numColorStages(); ++s) {
364        const GrProcessor* effect = pipelineBuilder.getColorStage(s).processor();
365        int numTextures = effect->numTextures();
366        for (int t = 0; t < numTextures; ++t) {
367            GrTexture* texture = effect->texture(t);
368            SkASSERT(texture->asRenderTarget() != pipelineBuilder.getRenderTarget());
369        }
370    }
371    for (int s = 0; s < pipelineBuilder.numCoverageStages(); ++s) {
372        const GrProcessor* effect = pipelineBuilder.getCoverageStage(s).processor();
373        int numTextures = effect->numTextures();
374        for (int t = 0; t < numTextures; ++t) {
375            GrTexture* texture = effect->texture(t);
376            SkASSERT(texture->asRenderTarget() != pipelineBuilder.getRenderTarget());
377        }
378    }
379
380#endif
381    if (NULL == pipelineBuilder.getRenderTarget()) {
382        return false;
383    }
384    return true;
385}
386
387bool GrDrawTarget::setupDstReadIfNecessary(GrPipelineBuilder* pipelineBuilder,
388                                           GrDeviceCoordTexture* dstCopy,
389                                           const SkRect* drawBounds) {
390    if (this->caps()->dstReadInShaderSupport() || !pipelineBuilder->willEffectReadDstColor()) {
391        return true;
392    }
393    SkIRect copyRect;
394    const GrClipData* clip = this->getClip();
395    GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
396    clip->getConservativeBounds(rt, &copyRect);
397
398    if (drawBounds) {
399        SkIRect drawIBounds;
400        drawBounds->roundOut(&drawIBounds);
401        if (!copyRect.intersect(drawIBounds)) {
402#ifdef SK_DEBUG
403            SkDebugf("Missed an early reject. Bailing on draw from setupDstReadIfNecessary.\n");
404#endif
405            return false;
406        }
407    } else {
408#ifdef SK_DEBUG
409        //SkDebugf("No dev bounds when dst copy is made.\n");
410#endif
411    }
412
413    // MSAA consideration: When there is support for reading MSAA samples in the shader we could
414    // have per-sample dst values by making the copy multisampled.
415    GrSurfaceDesc desc;
416    this->initCopySurfaceDstDesc(rt, &desc);
417    desc.fWidth = copyRect.width();
418    desc.fHeight = copyRect.height();
419
420    SkAutoTUnref<GrTexture> copy(
421        fContext->refScratchTexture(desc, GrContext::kApprox_ScratchTexMatch));
422
423    if (!copy) {
424        SkDebugf("Failed to create temporary copy of destination texture.\n");
425        return false;
426    }
427    SkIPoint dstPoint = {0, 0};
428    if (this->copySurface(copy, rt, copyRect, dstPoint)) {
429        dstCopy->setTexture(copy);
430        dstCopy->setOffset(copyRect.fLeft, copyRect.fTop);
431        return true;
432    } else {
433        return false;
434    }
435}
436
437void GrDrawTarget::drawIndexed(GrPipelineBuilder* pipelineBuilder,
438                               const GrGeometryProcessor* gp,
439                               GrPrimitiveType type,
440                               int startVertex,
441                               int startIndex,
442                               int vertexCount,
443                               int indexCount,
444                               const SkRect* devBounds) {
445    SkASSERT(pipelineBuilder);
446    if (indexCount > 0 &&
447        this->checkDraw(*pipelineBuilder, gp, type, startVertex, startIndex, vertexCount,
448                        indexCount)) {
449
450        // Setup clip
451        GrScissorState scissorState;
452        GrPipelineBuilder::AutoRestoreEffects are;
453        GrPipelineBuilder::AutoRestoreStencil ars;
454        if (!this->setupClip(pipelineBuilder, &are, &ars, &scissorState, devBounds)) {
455            return;
456        }
457
458        DrawInfo info;
459        info.fPrimitiveType = type;
460        info.fStartVertex   = startVertex;
461        info.fStartIndex    = startIndex;
462        info.fVertexCount   = vertexCount;
463        info.fIndexCount    = indexCount;
464
465        info.fInstanceCount         = 0;
466        info.fVerticesPerInstance   = 0;
467        info.fIndicesPerInstance    = 0;
468
469        if (devBounds) {
470            info.setDevBounds(*devBounds);
471        }
472
473        // TODO: We should continue with incorrect blending.
474        GrDeviceCoordTexture dstCopy;
475        if (!this->setupDstReadIfNecessary(pipelineBuilder, &dstCopy, devBounds)) {
476            return;
477        }
478        this->setDrawBuffers(&info, gp->getVertexStride());
479
480        this->onDraw(*pipelineBuilder, gp, info, scissorState, dstCopy.texture() ? &dstCopy : NULL);
481    }
482}
483
484void GrDrawTarget::drawNonIndexed(GrPipelineBuilder* pipelineBuilder,
485                                  const GrGeometryProcessor* gp,
486                                  GrPrimitiveType type,
487                                  int startVertex,
488                                  int vertexCount,
489                                  const SkRect* devBounds) {
490    SkASSERT(pipelineBuilder);
491    if (vertexCount > 0 && this->checkDraw(*pipelineBuilder, gp, type, startVertex, -1, vertexCount,
492                                           -1)) {
493
494        // Setup clip
495        GrScissorState scissorState;
496        GrPipelineBuilder::AutoRestoreEffects are;
497        GrPipelineBuilder::AutoRestoreStencil ars;
498        if (!this->setupClip(pipelineBuilder, &are, &ars, &scissorState, devBounds)) {
499            return;
500        }
501
502        DrawInfo info;
503        info.fPrimitiveType = type;
504        info.fStartVertex   = startVertex;
505        info.fStartIndex    = 0;
506        info.fVertexCount   = vertexCount;
507        info.fIndexCount    = 0;
508
509        info.fInstanceCount         = 0;
510        info.fVerticesPerInstance   = 0;
511        info.fIndicesPerInstance    = 0;
512
513        if (devBounds) {
514            info.setDevBounds(*devBounds);
515        }
516
517        // TODO: We should continue with incorrect blending.
518        GrDeviceCoordTexture dstCopy;
519        if (!this->setupDstReadIfNecessary(pipelineBuilder, &dstCopy, devBounds)) {
520            return;
521        }
522
523        this->setDrawBuffers(&info, gp->getVertexStride());
524
525        this->onDraw(*pipelineBuilder, gp, info, scissorState, dstCopy.texture() ? &dstCopy : NULL);
526    }
527}
528
529static const GrStencilSettings& winding_path_stencil_settings() {
530    GR_STATIC_CONST_SAME_STENCIL_STRUCT(gSettings,
531        kIncClamp_StencilOp,
532        kIncClamp_StencilOp,
533        kAlwaysIfInClip_StencilFunc,
534        0xFFFF, 0xFFFF, 0xFFFF);
535    return *GR_CONST_STENCIL_SETTINGS_PTR_FROM_STRUCT_PTR(&gSettings);
536}
537
538static const GrStencilSettings& even_odd_path_stencil_settings() {
539    GR_STATIC_CONST_SAME_STENCIL_STRUCT(gSettings,
540        kInvert_StencilOp,
541        kInvert_StencilOp,
542        kAlwaysIfInClip_StencilFunc,
543        0xFFFF, 0xFFFF, 0xFFFF);
544    return *GR_CONST_STENCIL_SETTINGS_PTR_FROM_STRUCT_PTR(&gSettings);
545}
546
547void GrDrawTarget::getPathStencilSettingsForFilltype(GrPathRendering::FillType fill,
548                                                     const GrStencilBuffer* sb,
549                                                     GrStencilSettings* outStencilSettings) {
550
551    switch (fill) {
552        default:
553            SkFAIL("Unexpected path fill.");
554        case GrPathRendering::kWinding_FillType:
555            *outStencilSettings = winding_path_stencil_settings();
556            break;
557        case GrPathRendering::kEvenOdd_FillType:
558            *outStencilSettings = even_odd_path_stencil_settings();
559            break;
560    }
561    this->clipMaskManager()->adjustPathStencilParams(sb, outStencilSettings);
562}
563
564void GrDrawTarget::stencilPath(GrPipelineBuilder* pipelineBuilder,
565                               const GrPathProcessor* pathProc,
566                               const GrPath* path,
567                               GrPathRendering::FillType fill) {
568    // TODO: extract portions of checkDraw that are relevant to path stenciling.
569    SkASSERT(path);
570    SkASSERT(this->caps()->pathRenderingSupport());
571    SkASSERT(pipelineBuilder);
572
573    // Setup clip
574    GrScissorState scissorState;
575    GrPipelineBuilder::AutoRestoreEffects are;
576    GrPipelineBuilder::AutoRestoreStencil ars;
577    if (!this->setupClip(pipelineBuilder, &are, &ars, &scissorState, NULL)) {
578        return;
579    }
580
581    // set stencil settings for path
582    GrStencilSettings stencilSettings;
583    this->getPathStencilSettingsForFilltype(fill,
584                                            pipelineBuilder->getRenderTarget()->getStencilBuffer(),
585                                            &stencilSettings);
586
587    this->onStencilPath(*pipelineBuilder, pathProc, path, scissorState, stencilSettings);
588}
589
590void GrDrawTarget::drawPath(GrPipelineBuilder* pipelineBuilder,
591                            const GrPathProcessor* pathProc,
592                            const GrPath* path,
593                            GrPathRendering::FillType fill) {
594    // TODO: extract portions of checkDraw that are relevant to path rendering.
595    SkASSERT(path);
596    SkASSERT(this->caps()->pathRenderingSupport());
597    SkASSERT(pipelineBuilder);
598
599    SkRect devBounds = path->getBounds();
600    pathProc->viewMatrix().mapRect(&devBounds);
601
602    // Setup clip
603    GrScissorState scissorState;
604    GrPipelineBuilder::AutoRestoreEffects are;
605    GrPipelineBuilder::AutoRestoreStencil ars;
606    if (!this->setupClip(pipelineBuilder, &are, &ars, &scissorState, &devBounds)) {
607       return;
608    }
609
610    // set stencil settings for path
611    GrStencilSettings stencilSettings;
612    this->getPathStencilSettingsForFilltype(fill,
613                                            pipelineBuilder->getRenderTarget()->getStencilBuffer(),
614                                            &stencilSettings);
615
616    GrDeviceCoordTexture dstCopy;
617    if (!this->setupDstReadIfNecessary(pipelineBuilder, &dstCopy, &devBounds)) {
618        return;
619    }
620
621    this->onDrawPath(*pipelineBuilder, pathProc, path, scissorState, stencilSettings,
622                     dstCopy.texture() ? &dstCopy : NULL);
623}
624
625void GrDrawTarget::drawPaths(GrPipelineBuilder* pipelineBuilder,
626                             const GrPathProcessor* pathProc,
627                             const GrPathRange* pathRange,
628                             const void* indices,
629                             PathIndexType indexType,
630                             const float transformValues[],
631                             PathTransformType transformType,
632                             int count,
633                             GrPathRendering::FillType fill) {
634    SkASSERT(this->caps()->pathRenderingSupport());
635    SkASSERT(pathRange);
636    SkASSERT(indices);
637    SkASSERT(0 == reinterpret_cast<long>(indices) % GrPathRange::PathIndexSizeInBytes(indexType));
638    SkASSERT(transformValues);
639    SkASSERT(pipelineBuilder);
640
641    // Setup clip
642    GrScissorState scissorState;
643    GrPipelineBuilder::AutoRestoreEffects are;
644    GrPipelineBuilder::AutoRestoreStencil ars;
645
646    if (!this->setupClip(pipelineBuilder, &are, &ars, &scissorState, NULL)) {
647        return;
648    }
649
650    // set stencil settings for path
651    GrStencilSettings stencilSettings;
652    this->getPathStencilSettingsForFilltype(fill,
653                                            pipelineBuilder->getRenderTarget()->getStencilBuffer(),
654                                            &stencilSettings);
655
656    // Don't compute a bounding box for setupDstReadIfNecessary(), we'll opt
657    // instead for it to just copy the entire dst. Realistically this is a moot
658    // point, because any context that supports NV_path_rendering will also
659    // support NV_blend_equation_advanced.
660    GrDeviceCoordTexture dstCopy;
661    if (!this->setupDstReadIfNecessary(pipelineBuilder, &dstCopy, NULL)) {
662        return;
663    }
664
665    this->onDrawPaths(*pipelineBuilder, pathProc, pathRange, indices, indexType, transformValues,
666                      transformType, count, scissorState, stencilSettings,
667                      dstCopy.texture() ? &dstCopy : NULL);
668}
669
670void GrDrawTarget::clear(const SkIRect* rect,
671                         GrColor color,
672                         bool canIgnoreRect,
673                         GrRenderTarget* renderTarget) {
674    if (fCaps->useDrawInsteadOfClear()) {
675        // This works around a driver bug with clear by drawing a rect instead.
676        // The driver will ignore a clear if it is the only thing rendered to a
677        // target before the target is read.
678        SkIRect rtRect = SkIRect::MakeWH(renderTarget->width(), renderTarget->height());
679        if (NULL == rect || canIgnoreRect || rect->contains(rtRect)) {
680            rect = &rtRect;
681            // We first issue a discard() since that may help tilers.
682            this->discard(renderTarget);
683        }
684
685        GrPipelineBuilder pipelineBuilder;
686        pipelineBuilder.setRenderTarget(renderTarget);
687
688        this->drawSimpleRect(&pipelineBuilder, color, SkMatrix::I(), *rect);
689    } else {
690        this->onClear(rect, color, canIgnoreRect, renderTarget);
691    }
692}
693
694typedef GrTraceMarkerSet::Iter TMIter;
695void GrDrawTarget::saveActiveTraceMarkers() {
696    if (this->caps()->gpuTracingSupport()) {
697        SkASSERT(0 == fStoredTraceMarkers.count());
698        fStoredTraceMarkers.addSet(fActiveTraceMarkers);
699        for (TMIter iter = fStoredTraceMarkers.begin(); iter != fStoredTraceMarkers.end(); ++iter) {
700            this->removeGpuTraceMarker(&(*iter));
701        }
702    }
703}
704
705void GrDrawTarget::restoreActiveTraceMarkers() {
706    if (this->caps()->gpuTracingSupport()) {
707        SkASSERT(0 == fActiveTraceMarkers.count());
708        for (TMIter iter = fStoredTraceMarkers.begin(); iter != fStoredTraceMarkers.end(); ++iter) {
709            this->addGpuTraceMarker(&(*iter));
710        }
711        for (TMIter iter = fActiveTraceMarkers.begin(); iter != fActiveTraceMarkers.end(); ++iter) {
712            this->fStoredTraceMarkers.remove(*iter);
713        }
714    }
715}
716
717void GrDrawTarget::addGpuTraceMarker(const GrGpuTraceMarker* marker) {
718    if (this->caps()->gpuTracingSupport()) {
719        SkASSERT(fGpuTraceMarkerCount >= 0);
720        this->fActiveTraceMarkers.add(*marker);
721        ++fGpuTraceMarkerCount;
722    }
723}
724
725void GrDrawTarget::removeGpuTraceMarker(const GrGpuTraceMarker* marker) {
726    if (this->caps()->gpuTracingSupport()) {
727        SkASSERT(fGpuTraceMarkerCount >= 1);
728        this->fActiveTraceMarkers.remove(*marker);
729        --fGpuTraceMarkerCount;
730    }
731}
732
733////////////////////////////////////////////////////////////////////////////////
734
735void GrDrawTarget::drawIndexedInstances(GrPipelineBuilder* pipelineBuilder,
736                                        const GrGeometryProcessor* gp,
737                                        GrPrimitiveType type,
738                                        int instanceCount,
739                                        int verticesPerInstance,
740                                        int indicesPerInstance,
741                                        const SkRect* devBounds) {
742    SkASSERT(pipelineBuilder);
743
744    if (!verticesPerInstance || !indicesPerInstance) {
745        return;
746    }
747
748    int maxInstancesPerDraw = this->indexCountInCurrentSource() / indicesPerInstance;
749    if (!maxInstancesPerDraw) {
750        return;
751    }
752
753    // Setup clip
754    GrScissorState scissorState;
755    GrPipelineBuilder::AutoRestoreEffects are;
756    GrPipelineBuilder::AutoRestoreStencil ars;
757    if (!this->setupClip(pipelineBuilder, &are, &ars, &scissorState, devBounds)) {
758        return;
759    }
760
761    DrawInfo info;
762    info.fPrimitiveType = type;
763    info.fStartIndex = 0;
764    info.fStartVertex = 0;
765    info.fIndicesPerInstance = indicesPerInstance;
766    info.fVerticesPerInstance = verticesPerInstance;
767
768    // Set the same bounds for all the draws.
769    if (devBounds) {
770        info.setDevBounds(*devBounds);
771    }
772
773    // TODO: We should continue with incorrect blending.
774    GrDeviceCoordTexture dstCopy;
775    if (!this->setupDstReadIfNecessary(pipelineBuilder, &dstCopy, devBounds)) {
776        return;
777    }
778
779    while (instanceCount) {
780        info.fInstanceCount = SkTMin(instanceCount, maxInstancesPerDraw);
781        info.fVertexCount = info.fInstanceCount * verticesPerInstance;
782        info.fIndexCount = info.fInstanceCount * indicesPerInstance;
783
784        if (this->checkDraw(*pipelineBuilder,
785                            gp,
786                            type,
787                            info.fStartVertex,
788                            info.fStartIndex,
789                            info.fVertexCount,
790                            info.fIndexCount)) {
791            this->setDrawBuffers(&info, gp->getVertexStride());
792            this->onDraw(*pipelineBuilder, gp, info, scissorState,
793                         dstCopy.texture() ? &dstCopy : NULL);
794        }
795        info.fStartVertex += info.fVertexCount;
796        instanceCount -= info.fInstanceCount;
797    }
798}
799
800////////////////////////////////////////////////////////////////////////////////
801
802GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry(
803                                         GrDrawTarget*  target,
804                                         int vertexCount,
805                                         size_t vertexStride,
806                                         int indexCount) {
807    fTarget = NULL;
808    this->set(target, vertexCount, vertexStride, indexCount);
809}
810
811GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry() {
812    fTarget = NULL;
813}
814
815GrDrawTarget::AutoReleaseGeometry::~AutoReleaseGeometry() {
816    this->reset();
817}
818
819bool GrDrawTarget::AutoReleaseGeometry::set(GrDrawTarget*  target,
820                                            int vertexCount,
821                                            size_t vertexStride,
822                                            int indexCount) {
823    this->reset();
824    fTarget = target;
825    bool success = true;
826    if (fTarget) {
827        success = target->reserveVertexAndIndexSpace(vertexCount,
828                                                     vertexStride,
829                                                     indexCount,
830                                                     &fVertices,
831                                                     &fIndices);
832        if (!success) {
833            fTarget = NULL;
834            this->reset();
835        }
836    }
837    SkASSERT(success == SkToBool(fTarget));
838    return success;
839}
840
841void GrDrawTarget::AutoReleaseGeometry::reset() {
842    if (fTarget) {
843        if (fVertices) {
844            fTarget->resetVertexSource();
845        }
846        if (fIndices) {
847            fTarget->resetIndexSource();
848        }
849        fTarget = NULL;
850    }
851    fVertices = NULL;
852    fIndices = NULL;
853}
854
855GrDrawTarget::AutoClipRestore::AutoClipRestore(GrDrawTarget* target, const SkIRect& newClip) {
856    fTarget = target;
857    fClip = fTarget->getClip();
858    fStack.init();
859    fStack.get()->clipDevRect(newClip, SkRegion::kReplace_Op);
860    fReplacementClip.fClipStack = fStack.get();
861    target->setClip(&fReplacementClip);
862}
863
864namespace {
865// returns true if the read/written rect intersects the src/dst and false if not.
866bool clip_srcrect_and_dstpoint(const GrSurface* dst,
867                               const GrSurface* src,
868                               const SkIRect& srcRect,
869                               const SkIPoint& dstPoint,
870                               SkIRect* clippedSrcRect,
871                               SkIPoint* clippedDstPoint) {
872    *clippedSrcRect = srcRect;
873    *clippedDstPoint = dstPoint;
874
875    // clip the left edge to src and dst bounds, adjusting dstPoint if necessary
876    if (clippedSrcRect->fLeft < 0) {
877        clippedDstPoint->fX -= clippedSrcRect->fLeft;
878        clippedSrcRect->fLeft = 0;
879    }
880    if (clippedDstPoint->fX < 0) {
881        clippedSrcRect->fLeft -= clippedDstPoint->fX;
882        clippedDstPoint->fX = 0;
883    }
884
885    // clip the top edge to src and dst bounds, adjusting dstPoint if necessary
886    if (clippedSrcRect->fTop < 0) {
887        clippedDstPoint->fY -= clippedSrcRect->fTop;
888        clippedSrcRect->fTop = 0;
889    }
890    if (clippedDstPoint->fY < 0) {
891        clippedSrcRect->fTop -= clippedDstPoint->fY;
892        clippedDstPoint->fY = 0;
893    }
894
895    // clip the right edge to the src and dst bounds.
896    if (clippedSrcRect->fRight > src->width()) {
897        clippedSrcRect->fRight = src->width();
898    }
899    if (clippedDstPoint->fX + clippedSrcRect->width() > dst->width()) {
900        clippedSrcRect->fRight = clippedSrcRect->fLeft + dst->width() - clippedDstPoint->fX;
901    }
902
903    // clip the bottom edge to the src and dst bounds.
904    if (clippedSrcRect->fBottom > src->height()) {
905        clippedSrcRect->fBottom = src->height();
906    }
907    if (clippedDstPoint->fY + clippedSrcRect->height() > dst->height()) {
908        clippedSrcRect->fBottom = clippedSrcRect->fTop + dst->height() - clippedDstPoint->fY;
909    }
910
911    // The above clipping steps may have inverted the rect if it didn't intersect either the src or
912    // dst bounds.
913    return !clippedSrcRect->isEmpty();
914}
915}
916
917bool GrDrawTarget::copySurface(GrSurface* dst,
918                               GrSurface* src,
919                               const SkIRect& srcRect,
920                               const SkIPoint& dstPoint) {
921    SkASSERT(dst);
922    SkASSERT(src);
923
924    SkIRect clippedSrcRect;
925    SkIPoint clippedDstPoint;
926    // If the rect is outside the src or dst then we've already succeeded.
927    if (!clip_srcrect_and_dstpoint(dst,
928                                   src,
929                                   srcRect,
930                                   dstPoint,
931                                   &clippedSrcRect,
932                                   &clippedDstPoint)) {
933        return true;
934    }
935
936    if (this->onCopySurface(dst, src, clippedSrcRect, clippedDstPoint)) {
937        return true;
938    }
939
940    GrRenderTarget* rt = dst->asRenderTarget();
941    GrTexture* tex = src->asTexture();
942
943    if ((dst == src) || !rt || !tex) {
944        return false;
945    }
946
947    GrPipelineBuilder pipelineBuilder;
948    pipelineBuilder.setRenderTarget(rt);
949    SkMatrix matrix;
950    matrix.setTranslate(SkIntToScalar(clippedSrcRect.fLeft - clippedDstPoint.fX),
951                        SkIntToScalar(clippedSrcRect.fTop - clippedDstPoint.fY));
952    matrix.postIDiv(tex->width(), tex->height());
953    pipelineBuilder.addColorTextureProcessor(tex, matrix);
954    SkIRect dstRect = SkIRect::MakeXYWH(clippedDstPoint.fX,
955                                        clippedDstPoint.fY,
956                                        clippedSrcRect.width(),
957                                        clippedSrcRect.height());
958    this->drawSimpleRect(&pipelineBuilder, GrColor_WHITE, SkMatrix::I(), dstRect);
959    return true;
960}
961
962bool GrDrawTarget::canCopySurface(const GrSurface* dst,
963                                  const GrSurface* src,
964                                  const SkIRect& srcRect,
965                                  const SkIPoint& dstPoint) {
966    SkASSERT(dst);
967    SkASSERT(src);
968
969    SkIRect clippedSrcRect;
970    SkIPoint clippedDstPoint;
971    // If the rect is outside the src or dst then we're guaranteed success
972    if (!clip_srcrect_and_dstpoint(dst,
973                                   src,
974                                   srcRect,
975                                   dstPoint,
976                                   &clippedSrcRect,
977                                   &clippedDstPoint)) {
978        return true;
979    }
980    return this->internalCanCopySurface(dst, src, clippedSrcRect, clippedDstPoint);
981}
982
983bool GrDrawTarget::internalCanCopySurface(const GrSurface* dst,
984                                          const GrSurface* src,
985                                          const SkIRect& clippedSrcRect,
986                                          const SkIPoint& clippedDstPoint) {
987    // Check that the read/write rects are contained within the src/dst bounds.
988    SkASSERT(!clippedSrcRect.isEmpty());
989    SkASSERT(SkIRect::MakeWH(src->width(), src->height()).contains(clippedSrcRect));
990    SkASSERT(clippedDstPoint.fX >= 0 && clippedDstPoint.fY >= 0);
991    SkASSERT(clippedDstPoint.fX + clippedSrcRect.width() <= dst->width() &&
992             clippedDstPoint.fY + clippedSrcRect.height() <= dst->height());
993
994    // The base class can do it as a draw or the subclass may be able to handle it.
995    return ((dst != src) && dst->asRenderTarget() && src->asTexture()) ||
996           this->onCanCopySurface(dst, src, clippedSrcRect, clippedDstPoint);
997}
998
999///////////////////////////////////////////////////////////////////////////////
1000
1001void GrDrawTargetCaps::reset() {
1002    fMipMapSupport = false;
1003    fNPOTTextureTileSupport = false;
1004    fTwoSidedStencilSupport = false;
1005    fStencilWrapOpsSupport = false;
1006    fHWAALineSupport = false;
1007    fShaderDerivativeSupport = false;
1008    fGeometryShaderSupport = false;
1009    fDualSourceBlendingSupport = false;
1010    fPathRenderingSupport = false;
1011    fDstReadInShaderSupport = false;
1012    fDiscardRenderTargetSupport = false;
1013    fReuseScratchTextures = true;
1014    fGpuTracingSupport = false;
1015    fCompressedTexSubImageSupport = false;
1016
1017    fUseDrawInsteadOfClear = false;
1018
1019    fMapBufferFlags = kNone_MapFlags;
1020
1021    fMaxRenderTargetSize = 0;
1022    fMaxTextureSize = 0;
1023    fMaxSampleCount = 0;
1024
1025    fShaderPrecisionVaries = false;
1026
1027    memset(fConfigRenderSupport, 0, sizeof(fConfigRenderSupport));
1028    memset(fConfigTextureSupport, 0, sizeof(fConfigTextureSupport));
1029}
1030
1031GrDrawTargetCaps& GrDrawTargetCaps::operator=(const GrDrawTargetCaps& other) {
1032    fMipMapSupport = other.fMipMapSupport;
1033    fNPOTTextureTileSupport = other.fNPOTTextureTileSupport;
1034    fTwoSidedStencilSupport = other.fTwoSidedStencilSupport;
1035    fStencilWrapOpsSupport = other.fStencilWrapOpsSupport;
1036    fHWAALineSupport = other.fHWAALineSupport;
1037    fShaderDerivativeSupport = other.fShaderDerivativeSupport;
1038    fGeometryShaderSupport = other.fGeometryShaderSupport;
1039    fDualSourceBlendingSupport = other.fDualSourceBlendingSupport;
1040    fPathRenderingSupport = other.fPathRenderingSupport;
1041    fDstReadInShaderSupport = other.fDstReadInShaderSupport;
1042    fDiscardRenderTargetSupport = other.fDiscardRenderTargetSupport;
1043    fReuseScratchTextures = other.fReuseScratchTextures;
1044    fGpuTracingSupport = other.fGpuTracingSupport;
1045    fCompressedTexSubImageSupport = other.fCompressedTexSubImageSupport;
1046
1047    fUseDrawInsteadOfClear = other.fUseDrawInsteadOfClear;
1048
1049    fMapBufferFlags = other.fMapBufferFlags;
1050
1051    fMaxRenderTargetSize = other.fMaxRenderTargetSize;
1052    fMaxTextureSize = other.fMaxTextureSize;
1053    fMaxSampleCount = other.fMaxSampleCount;
1054
1055    memcpy(fConfigRenderSupport, other.fConfigRenderSupport, sizeof(fConfigRenderSupport));
1056    memcpy(fConfigTextureSupport, other.fConfigTextureSupport, sizeof(fConfigTextureSupport));
1057
1058    fShaderPrecisionVaries = other.fShaderPrecisionVaries;
1059    for (int s = 0; s < kGrShaderTypeCount; ++s) {
1060        for (int p = 0; p < kGrSLPrecisionCount; ++p) {
1061            fFloatPrecisions[s][p] = other.fFloatPrecisions[s][p];
1062        }
1063    }
1064    return *this;
1065}
1066
1067static SkString map_flags_to_string(uint32_t flags) {
1068    SkString str;
1069    if (GrDrawTargetCaps::kNone_MapFlags == flags) {
1070        str = "none";
1071    } else {
1072        SkASSERT(GrDrawTargetCaps::kCanMap_MapFlag & flags);
1073        SkDEBUGCODE(flags &= ~GrDrawTargetCaps::kCanMap_MapFlag);
1074        str = "can_map";
1075
1076        if (GrDrawTargetCaps::kSubset_MapFlag & flags) {
1077            str.append(" partial");
1078        } else {
1079            str.append(" full");
1080        }
1081        SkDEBUGCODE(flags &= ~GrDrawTargetCaps::kSubset_MapFlag);
1082    }
1083    SkASSERT(0 == flags); // Make sure we handled all the flags.
1084    return str;
1085}
1086
1087static const char* shader_type_to_string(GrShaderType type) {
1088    switch (type) {
1089        case kVertex_GrShaderType:
1090            return "vertex";
1091        case kGeometry_GrShaderType:
1092            return "geometry";
1093        case kFragment_GrShaderType:
1094            return "fragment";
1095    }
1096    return "";
1097}
1098
1099static const char* precision_to_string(GrSLPrecision p) {
1100    switch (p) {
1101        case kLow_GrSLPrecision:
1102            return "low";
1103        case kMedium_GrSLPrecision:
1104            return "medium";
1105        case kHigh_GrSLPrecision:
1106            return "high";
1107    }
1108    return "";
1109}
1110
1111SkString GrDrawTargetCaps::dump() const {
1112    SkString r;
1113    static const char* gNY[] = {"NO", "YES"};
1114    r.appendf("MIP Map Support                    : %s\n", gNY[fMipMapSupport]);
1115    r.appendf("NPOT Texture Tile Support          : %s\n", gNY[fNPOTTextureTileSupport]);
1116    r.appendf("Two Sided Stencil Support          : %s\n", gNY[fTwoSidedStencilSupport]);
1117    r.appendf("Stencil Wrap Ops  Support          : %s\n", gNY[fStencilWrapOpsSupport]);
1118    r.appendf("HW AA Lines Support                : %s\n", gNY[fHWAALineSupport]);
1119    r.appendf("Shader Derivative Support          : %s\n", gNY[fShaderDerivativeSupport]);
1120    r.appendf("Geometry Shader Support            : %s\n", gNY[fGeometryShaderSupport]);
1121    r.appendf("Dual Source Blending Support       : %s\n", gNY[fDualSourceBlendingSupport]);
1122    r.appendf("Path Rendering Support             : %s\n", gNY[fPathRenderingSupport]);
1123    r.appendf("Dst Read In Shader Support         : %s\n", gNY[fDstReadInShaderSupport]);
1124    r.appendf("Discard Render Target Support      : %s\n", gNY[fDiscardRenderTargetSupport]);
1125    r.appendf("Reuse Scratch Textures             : %s\n", gNY[fReuseScratchTextures]);
1126    r.appendf("Gpu Tracing Support                : %s\n", gNY[fGpuTracingSupport]);
1127    r.appendf("Compressed Update Support          : %s\n", gNY[fCompressedTexSubImageSupport]);
1128
1129    r.appendf("Draw Instead of Clear [workaround] : %s\n", gNY[fUseDrawInsteadOfClear]);
1130
1131    r.appendf("Max Texture Size                   : %d\n", fMaxTextureSize);
1132    r.appendf("Max Render Target Size             : %d\n", fMaxRenderTargetSize);
1133    r.appendf("Max Sample Count                   : %d\n", fMaxSampleCount);
1134
1135    r.appendf("Map Buffer Support                 : %s\n",
1136              map_flags_to_string(fMapBufferFlags).c_str());
1137
1138    static const char* kConfigNames[] = {
1139        "Unknown",  // kUnknown_GrPixelConfig
1140        "Alpha8",   // kAlpha_8_GrPixelConfig,
1141        "Index8",   // kIndex_8_GrPixelConfig,
1142        "RGB565",   // kRGB_565_GrPixelConfig,
1143        "RGBA444",  // kRGBA_4444_GrPixelConfig,
1144        "RGBA8888", // kRGBA_8888_GrPixelConfig,
1145        "BGRA8888", // kBGRA_8888_GrPixelConfig,
1146        "SRGBA8888",// kSRGBA_8888_GrPixelConfig,
1147        "ETC1",     // kETC1_GrPixelConfig,
1148        "LATC",     // kLATC_GrPixelConfig,
1149        "R11EAC",   // kR11_EAC_GrPixelConfig,
1150        "ASTC12x12",// kASTC_12x12_GrPixelConfig,
1151        "RGBAFloat",// kRGBA_float_GrPixelConfig
1152        "AlphaHalf",// kAlpha_half_GrPixelConfig
1153    };
1154    GR_STATIC_ASSERT(0  == kUnknown_GrPixelConfig);
1155    GR_STATIC_ASSERT(1  == kAlpha_8_GrPixelConfig);
1156    GR_STATIC_ASSERT(2  == kIndex_8_GrPixelConfig);
1157    GR_STATIC_ASSERT(3  == kRGB_565_GrPixelConfig);
1158    GR_STATIC_ASSERT(4  == kRGBA_4444_GrPixelConfig);
1159    GR_STATIC_ASSERT(5  == kRGBA_8888_GrPixelConfig);
1160    GR_STATIC_ASSERT(6  == kBGRA_8888_GrPixelConfig);
1161    GR_STATIC_ASSERT(7  == kSRGBA_8888_GrPixelConfig);
1162    GR_STATIC_ASSERT(8  == kETC1_GrPixelConfig);
1163    GR_STATIC_ASSERT(9  == kLATC_GrPixelConfig);
1164    GR_STATIC_ASSERT(10  == kR11_EAC_GrPixelConfig);
1165    GR_STATIC_ASSERT(11 == kASTC_12x12_GrPixelConfig);
1166    GR_STATIC_ASSERT(12 == kRGBA_float_GrPixelConfig);
1167    GR_STATIC_ASSERT(13 == kAlpha_half_GrPixelConfig);
1168    GR_STATIC_ASSERT(SK_ARRAY_COUNT(kConfigNames) == kGrPixelConfigCnt);
1169
1170    SkASSERT(!fConfigRenderSupport[kUnknown_GrPixelConfig][0]);
1171    SkASSERT(!fConfigRenderSupport[kUnknown_GrPixelConfig][1]);
1172
1173    for (size_t i = 1; i < SK_ARRAY_COUNT(kConfigNames); ++i)  {
1174        r.appendf("%s is renderable: %s, with MSAA: %s\n",
1175                  kConfigNames[i],
1176                  gNY[fConfigRenderSupport[i][0]],
1177                  gNY[fConfigRenderSupport[i][1]]);
1178    }
1179
1180    SkASSERT(!fConfigTextureSupport[kUnknown_GrPixelConfig]);
1181
1182    for (size_t i = 1; i < SK_ARRAY_COUNT(kConfigNames); ++i)  {
1183        r.appendf("%s is uploadable to a texture: %s\n",
1184                  kConfigNames[i],
1185                  gNY[fConfigTextureSupport[i]]);
1186    }
1187
1188    r.appendf("Shader Float Precisions (varies: %s):\n", gNY[fShaderPrecisionVaries]);
1189
1190    for (int s = 0; s < kGrShaderTypeCount; ++s) {
1191        GrShaderType shaderType = static_cast<GrShaderType>(s);
1192        r.appendf("\t%s:\n", shader_type_to_string(shaderType));
1193        for (int p = 0; p < kGrSLPrecisionCount; ++p) {
1194            if (fFloatPrecisions[s][p].supported()) {
1195                GrSLPrecision precision = static_cast<GrSLPrecision>(p);
1196                r.appendf("\t\t%s: log_low: %d log_high: %d bits: %d\n",
1197                          precision_to_string(precision),
1198                          fFloatPrecisions[s][p].fLogRangeLow,
1199                          fFloatPrecisions[s][p].fLogRangeHigh,
1200                          fFloatPrecisions[s][p].fBits);
1201            }
1202        }
1203    }
1204
1205    return r;
1206}
1207
1208uint32_t GrDrawTargetCaps::CreateUniqueID() {
1209    static int32_t gUniqueID = SK_InvalidUniqueID;
1210    uint32_t id;
1211    do {
1212        id = static_cast<uint32_t>(sk_atomic_inc(&gUniqueID) + 1);
1213    } while (id == SK_InvalidUniqueID);
1214    return id;
1215}
1216
1217///////////////////////////////////////////////////////////////////////////////////////////////////
1218
1219bool GrClipTarget::setupClip(GrPipelineBuilder* pipelineBuilder,
1220                             GrPipelineBuilder::AutoRestoreEffects* are,
1221                             GrPipelineBuilder::AutoRestoreStencil* ars,
1222                             GrScissorState* scissorState,
1223                             const SkRect* devBounds) {
1224    return fClipMaskManager.setupClipping(pipelineBuilder,
1225                                          are,
1226                                          ars,
1227                                          scissorState,
1228                                          this->getClip(),
1229                                          devBounds);
1230}
1231