| |
| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| |
| #include "GrDrawTarget.h" |
| #include "GrRenderTarget.h" |
| #include "GrTexture.h" |
| #include "GrVertexBuffer.h" |
| |
| #include "SkStrokeRec.h" |
| |
| SK_DEFINE_INST_COUNT(GrDrawTarget) |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| GrDrawTarget::DrawInfo& GrDrawTarget::DrawInfo::operator =(const DrawInfo& di) { |
| fPrimitiveType = di.fPrimitiveType; |
| fStartVertex = di.fStartVertex; |
| fStartIndex = di.fStartIndex; |
| fVertexCount = di.fVertexCount; |
| fIndexCount = di.fIndexCount; |
| |
| fInstanceCount = di.fInstanceCount; |
| fVerticesPerInstance = di.fVerticesPerInstance; |
| fIndicesPerInstance = di.fIndicesPerInstance; |
| |
| if (NULL != di.fDevBounds) { |
| GrAssert(di.fDevBounds == &di.fDevBoundsStorage); |
| fDevBoundsStorage = di.fDevBoundsStorage; |
| fDevBounds = &fDevBoundsStorage; |
| } else { |
| fDevBounds = NULL; |
| } |
| return *this; |
| } |
| |
| #if GR_DEBUG |
| bool GrDrawTarget::DrawInfo::isInstanced() const { |
| if (fInstanceCount > 0) { |
| GrAssert(0 == fIndexCount % fIndicesPerInstance); |
| GrAssert(0 == fVertexCount % fVerticesPerInstance); |
| GrAssert(fIndexCount / fIndicesPerInstance == fInstanceCount); |
| GrAssert(fVertexCount / fVerticesPerInstance == fInstanceCount); |
| // there is no way to specify a non-zero start index to drawIndexedInstances(). |
| GrAssert(0 == fStartIndex); |
| return true; |
| } else { |
| GrAssert(!fVerticesPerInstance); |
| GrAssert(!fIndicesPerInstance); |
| return false; |
| } |
| } |
| #endif |
| |
| void GrDrawTarget::DrawInfo::adjustInstanceCount(int instanceOffset) { |
| GrAssert(this->isInstanced()); |
| GrAssert(instanceOffset + fInstanceCount >= 0); |
| fInstanceCount += instanceOffset; |
| fVertexCount = fVerticesPerInstance * fInstanceCount; |
| fIndexCount = fIndicesPerInstance * fInstanceCount; |
| } |
| |
| void GrDrawTarget::DrawInfo::adjustStartVertex(int vertexOffset) { |
| fStartVertex += vertexOffset; |
| GrAssert(fStartVertex >= 0); |
| } |
| |
| void GrDrawTarget::DrawInfo::adjustStartIndex(int indexOffset) { |
| GrAssert(this->isIndexed()); |
| fStartIndex += indexOffset; |
| GrAssert(fStartIndex >= 0); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| #define DEBUG_INVAL_BUFFER 0xdeadcafe |
| #define DEBUG_INVAL_START_IDX -1 |
| |
| GrDrawTarget::GrDrawTarget() : fClip(NULL) { |
| fDrawState = &fDefaultDrawState; |
| // We assume that fDrawState always owns a ref to the object it points at. |
| fDefaultDrawState.ref(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.push_back(); |
| #if GR_DEBUG |
| geoSrc.fVertexCount = DEBUG_INVAL_START_IDX; |
| geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER; |
| geoSrc.fIndexCount = DEBUG_INVAL_START_IDX; |
| geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER; |
| #endif |
| geoSrc.fVertexSrc = kNone_GeometrySrcType; |
| geoSrc.fIndexSrc = kNone_GeometrySrcType; |
| } |
| |
| GrDrawTarget::~GrDrawTarget() { |
| GrAssert(1 == fGeoSrcStateStack.count()); |
| SkDEBUGCODE(GeometrySrcState& geoSrc = fGeoSrcStateStack.back()); |
| GrAssert(kNone_GeometrySrcType == geoSrc.fIndexSrc); |
| GrAssert(kNone_GeometrySrcType == geoSrc.fVertexSrc); |
| fDrawState->unref(); |
| } |
| |
| void GrDrawTarget::releaseGeometry() { |
| int popCnt = fGeoSrcStateStack.count() - 1; |
| while (popCnt) { |
| this->popGeometrySource(); |
| --popCnt; |
| } |
| this->resetVertexSource(); |
| this->resetIndexSource(); |
| } |
| |
| void GrDrawTarget::setClip(const GrClipData* clip) { |
| clipWillBeSet(clip); |
| fClip = clip; |
| } |
| |
| const GrClipData* GrDrawTarget::getClip() const { |
| return fClip; |
| } |
| |
| void GrDrawTarget::setDrawState(GrDrawState* drawState) { |
| GrAssert(NULL != fDrawState); |
| if (NULL == drawState) { |
| drawState = &fDefaultDrawState; |
| } |
| if (fDrawState != drawState) { |
| fDrawState->unref(); |
| drawState->ref(); |
| fDrawState = drawState; |
| } |
| } |
| |
| bool GrDrawTarget::reserveVertexSpace(GrVertexLayout vertexLayout, |
| int vertexCount, |
| void** vertices) { |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| bool acquired = false; |
| if (vertexCount > 0) { |
| GrAssert(NULL != vertices); |
| this->releasePreviousVertexSource(); |
| geoSrc.fVertexSrc = kNone_GeometrySrcType; |
| |
| acquired = this->onReserveVertexSpace(GrDrawState::VertexSize(vertexLayout), |
| vertexCount, |
| vertices); |
| } |
| if (acquired) { |
| geoSrc.fVertexSrc = kReserved_GeometrySrcType; |
| geoSrc.fVertexCount = vertexCount; |
| geoSrc.fVertexLayout = vertexLayout; |
| } else if (NULL != vertices) { |
| *vertices = NULL; |
| } |
| return acquired; |
| } |
| |
| bool GrDrawTarget::reserveIndexSpace(int indexCount, |
| void** indices) { |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| bool acquired = false; |
| if (indexCount > 0) { |
| GrAssert(NULL != indices); |
| this->releasePreviousIndexSource(); |
| geoSrc.fIndexSrc = kNone_GeometrySrcType; |
| |
| acquired = this->onReserveIndexSpace(indexCount, indices); |
| } |
| if (acquired) { |
| geoSrc.fIndexSrc = kReserved_GeometrySrcType; |
| geoSrc.fIndexCount = indexCount; |
| } else if (NULL != indices) { |
| *indices = NULL; |
| } |
| return acquired; |
| |
| } |
| |
| bool GrDrawTarget::reserveVertexAndIndexSpace(GrVertexLayout vertexLayout, |
| int vertexCount, |
| int indexCount, |
| void** vertices, |
| void** indices) { |
| this->willReserveVertexAndIndexSpace(GrDrawState::VertexSize(vertexLayout), vertexCount, indexCount); |
| if (vertexCount) { |
| if (!this->reserveVertexSpace(vertexLayout, vertexCount, vertices)) { |
| if (indexCount) { |
| this->resetIndexSource(); |
| } |
| return false; |
| } |
| } |
| if (indexCount) { |
| if (!this->reserveIndexSpace(indexCount, indices)) { |
| if (vertexCount) { |
| this->resetVertexSource(); |
| } |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool GrDrawTarget::geometryHints(size_t vertexSize, |
| int32_t* vertexCount, |
| int32_t* indexCount) const { |
| if (NULL != vertexCount) { |
| *vertexCount = -1; |
| } |
| if (NULL != indexCount) { |
| *indexCount = -1; |
| } |
| return false; |
| } |
| |
| void GrDrawTarget::releasePreviousVertexSource() { |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| switch (geoSrc.fVertexSrc) { |
| case kNone_GeometrySrcType: |
| break; |
| case kArray_GeometrySrcType: |
| this->releaseVertexArray(); |
| break; |
| case kReserved_GeometrySrcType: |
| this->releaseReservedVertexSpace(); |
| break; |
| case kBuffer_GeometrySrcType: |
| geoSrc.fVertexBuffer->unref(); |
| #if GR_DEBUG |
| geoSrc.fVertexBuffer = (GrVertexBuffer*)DEBUG_INVAL_BUFFER; |
| #endif |
| break; |
| default: |
| GrCrash("Unknown Vertex Source Type."); |
| break; |
| } |
| } |
| |
| void GrDrawTarget::releasePreviousIndexSource() { |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| switch (geoSrc.fIndexSrc) { |
| case kNone_GeometrySrcType: // these two don't require |
| break; |
| case kArray_GeometrySrcType: |
| this->releaseIndexArray(); |
| break; |
| case kReserved_GeometrySrcType: |
| this->releaseReservedIndexSpace(); |
| break; |
| case kBuffer_GeometrySrcType: |
| geoSrc.fIndexBuffer->unref(); |
| #if GR_DEBUG |
| geoSrc.fIndexBuffer = (GrIndexBuffer*)DEBUG_INVAL_BUFFER; |
| #endif |
| break; |
| default: |
| GrCrash("Unknown Index Source Type."); |
| break; |
| } |
| } |
| |
| void GrDrawTarget::setVertexSourceToArray(GrVertexLayout vertexLayout, |
| const void* vertexArray, |
| int vertexCount) { |
| this->releasePreviousVertexSource(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| geoSrc.fVertexSrc = kArray_GeometrySrcType; |
| geoSrc.fVertexLayout = vertexLayout; |
| geoSrc.fVertexCount = vertexCount; |
| this->onSetVertexSourceToArray(vertexArray, vertexCount); |
| } |
| |
| void GrDrawTarget::setIndexSourceToArray(const void* indexArray, |
| int indexCount) { |
| this->releasePreviousIndexSource(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| geoSrc.fIndexSrc = kArray_GeometrySrcType; |
| geoSrc.fIndexCount = indexCount; |
| this->onSetIndexSourceToArray(indexArray, indexCount); |
| } |
| |
| void GrDrawTarget::setVertexSourceToBuffer(GrVertexLayout vertexLayout, |
| const GrVertexBuffer* buffer) { |
| this->releasePreviousVertexSource(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| geoSrc.fVertexSrc = kBuffer_GeometrySrcType; |
| geoSrc.fVertexBuffer = buffer; |
| buffer->ref(); |
| geoSrc.fVertexLayout = vertexLayout; |
| } |
| |
| void GrDrawTarget::setIndexSourceToBuffer(const GrIndexBuffer* buffer) { |
| this->releasePreviousIndexSource(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| geoSrc.fIndexSrc = kBuffer_GeometrySrcType; |
| geoSrc.fIndexBuffer = buffer; |
| buffer->ref(); |
| } |
| |
| void GrDrawTarget::resetVertexSource() { |
| this->releasePreviousVertexSource(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| geoSrc.fVertexSrc = kNone_GeometrySrcType; |
| } |
| |
| void GrDrawTarget::resetIndexSource() { |
| this->releasePreviousIndexSource(); |
| GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| geoSrc.fIndexSrc = kNone_GeometrySrcType; |
| } |
| |
| void GrDrawTarget::pushGeometrySource() { |
| this->geometrySourceWillPush(); |
| GeometrySrcState& newState = fGeoSrcStateStack.push_back(); |
| newState.fIndexSrc = kNone_GeometrySrcType; |
| newState.fVertexSrc = kNone_GeometrySrcType; |
| #if GR_DEBUG |
| newState.fVertexCount = ~0; |
| newState.fVertexBuffer = (GrVertexBuffer*)~0; |
| newState.fIndexCount = ~0; |
| newState.fIndexBuffer = (GrIndexBuffer*)~0; |
| #endif |
| } |
| |
| void GrDrawTarget::popGeometrySource() { |
| // if popping last element then pops are unbalanced with pushes |
| GrAssert(fGeoSrcStateStack.count() > 1); |
| |
| this->geometrySourceWillPop(fGeoSrcStateStack.fromBack(1)); |
| this->releasePreviousVertexSource(); |
| this->releasePreviousIndexSource(); |
| fGeoSrcStateStack.pop_back(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool GrDrawTarget::checkDraw(GrPrimitiveType type, int startVertex, |
| int startIndex, int vertexCount, |
| int indexCount) const { |
| const GrDrawState& drawState = this->getDrawState(); |
| #if GR_DEBUG |
| const GeometrySrcState& geoSrc = fGeoSrcStateStack.back(); |
| int maxVertex = startVertex + vertexCount; |
| int maxValidVertex; |
| switch (geoSrc.fVertexSrc) { |
| case kNone_GeometrySrcType: |
| GrCrash("Attempting to draw without vertex src."); |
| case kReserved_GeometrySrcType: // fallthrough |
| case kArray_GeometrySrcType: |
| maxValidVertex = geoSrc.fVertexCount; |
| break; |
| case kBuffer_GeometrySrcType: |
| maxValidVertex = geoSrc.fVertexBuffer->sizeInBytes() / GrDrawState::VertexSize(geoSrc.fVertexLayout); |
| break; |
| } |
| if (maxVertex > maxValidVertex) { |
| GrCrash("Drawing outside valid vertex range."); |
| } |
| if (indexCount > 0) { |
| int maxIndex = startIndex + indexCount; |
| int maxValidIndex; |
| switch (geoSrc.fIndexSrc) { |
| case kNone_GeometrySrcType: |
| GrCrash("Attempting to draw indexed geom without index src."); |
| case kReserved_GeometrySrcType: // fallthrough |
| case kArray_GeometrySrcType: |
| maxValidIndex = geoSrc.fIndexCount; |
| break; |
| case kBuffer_GeometrySrcType: |
| maxValidIndex = geoSrc.fIndexBuffer->sizeInBytes() / sizeof(uint16_t); |
| break; |
| } |
| if (maxIndex > maxValidIndex) { |
| GrCrash("Index reads outside valid index range."); |
| } |
| } |
| |
| GrAssert(NULL != drawState.getRenderTarget()); |
| for (int s = 0; s < GrDrawState::kNumStages; ++s) { |
| if (drawState.isStageEnabled(s)) { |
| const GrEffectRef& effect = *drawState.getStage(s).getEffect(); |
| int numTextures = effect->numTextures(); |
| for (int t = 0; t < numTextures; ++t) { |
| GrTexture* texture = effect->texture(t); |
| GrAssert(texture->asRenderTarget() != drawState.getRenderTarget()); |
| } |
| } |
| } |
| #endif |
| if (NULL == drawState.getRenderTarget()) { |
| return false; |
| } |
| return true; |
| } |
| |
| void GrDrawTarget::drawIndexed(GrPrimitiveType type, |
| int startVertex, |
| int startIndex, |
| int vertexCount, |
| int indexCount, |
| const SkRect* devBounds) { |
| if (indexCount > 0 && this->checkDraw(type, startVertex, startIndex, vertexCount, indexCount)) { |
| DrawInfo info; |
| info.fPrimitiveType = type; |
| info.fStartVertex = startVertex; |
| info.fStartIndex = startIndex; |
| info.fVertexCount = vertexCount; |
| info.fIndexCount = indexCount; |
| |
| info.fInstanceCount = 0; |
| info.fVerticesPerInstance = 0; |
| info.fIndicesPerInstance = 0; |
| |
| if (NULL != devBounds) { |
| info.setDevBounds(*devBounds); |
| } |
| this->onDraw(info); |
| } |
| } |
| |
| void GrDrawTarget::drawNonIndexed(GrPrimitiveType type, |
| int startVertex, |
| int vertexCount, |
| const SkRect* devBounds) { |
| if (vertexCount > 0 && this->checkDraw(type, startVertex, -1, vertexCount, -1)) { |
| DrawInfo info; |
| info.fPrimitiveType = type; |
| info.fStartVertex = startVertex; |
| info.fStartIndex = 0; |
| info.fVertexCount = vertexCount; |
| info.fIndexCount = 0; |
| |
| info.fInstanceCount = 0; |
| info.fVerticesPerInstance = 0; |
| info.fIndicesPerInstance = 0; |
| |
| if (NULL != devBounds) { |
| info.setDevBounds(*devBounds); |
| } |
| this->onDraw(info); |
| } |
| } |
| |
| void GrDrawTarget::stencilPath(const GrPath* path, const SkStrokeRec& stroke, SkPath::FillType fill) { |
| // TODO: extract portions of checkDraw that are relevant to path stenciling. |
| GrAssert(NULL != path); |
| GrAssert(fCaps.pathStencilingSupport()); |
| GrAssert(!stroke.isHairlineStyle()); |
| GrAssert(!SkPath::IsInverseFillType(fill)); |
| this->onStencilPath(path, stroke, fill); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| // Some blend modes allow folding a partial coverage value into the color's |
| // alpha channel, while others will blend incorrectly. |
| bool GrDrawTarget::canTweakAlphaForCoverage() const { |
| /** |
| * The fractional coverage is f |
| * The src and dst coeffs are Cs and Cd |
| * The dst and src colors are S and D |
| * We want the blend to compute: f*Cs*S + (f*Cd + (1-f))D |
| * By tweaking the source color's alpha we're replacing S with S'=fS. It's |
| * obvious that that first term will always be ok. The second term can be |
| * rearranged as [1-(1-Cd)f]D. By substituting in the various possibilities |
| * for Cd we find that only 1, ISA, and ISC produce the correct depth |
| * coefficient in terms of S' and D. |
| */ |
| GrBlendCoeff dstCoeff = this->getDrawState().getDstBlendCoeff(); |
| return kOne_GrBlendCoeff == dstCoeff || |
| kISA_GrBlendCoeff == dstCoeff || |
| kISC_GrBlendCoeff == dstCoeff || |
| this->getDrawState().isCoverageDrawing(); |
| } |
| |
| namespace { |
| GrVertexLayout default_blend_opts_vertex_layout() { |
| GrVertexLayout layout = 0; |
| return layout; |
| } |
| } |
| |
| GrDrawTarget::BlendOptFlags |
| GrDrawTarget::getBlendOpts(bool forceCoverage, |
| GrBlendCoeff* srcCoeff, |
| GrBlendCoeff* dstCoeff) const { |
| |
| GrVertexLayout layout; |
| if (kNone_GeometrySrcType == this->getGeomSrc().fVertexSrc) { |
| layout = default_blend_opts_vertex_layout(); |
| } else { |
| layout = this->getVertexLayout(); |
| } |
| |
| const GrDrawState& drawState = this->getDrawState(); |
| |
| GrBlendCoeff bogusSrcCoeff, bogusDstCoeff; |
| if (NULL == srcCoeff) { |
| srcCoeff = &bogusSrcCoeff; |
| } |
| *srcCoeff = drawState.getSrcBlendCoeff(); |
| |
| if (NULL == dstCoeff) { |
| dstCoeff = &bogusDstCoeff; |
| } |
| *dstCoeff = drawState.getDstBlendCoeff(); |
| |
| if (drawState.isColorWriteDisabled()) { |
| *srcCoeff = kZero_GrBlendCoeff; |
| *dstCoeff = kOne_GrBlendCoeff; |
| } |
| |
| bool srcAIsOne = drawState.srcAlphaWillBeOne(layout); |
| bool dstCoeffIsOne = kOne_GrBlendCoeff == *dstCoeff || |
| (kSA_GrBlendCoeff == *dstCoeff && srcAIsOne); |
| bool dstCoeffIsZero = kZero_GrBlendCoeff == *dstCoeff || |
| (kISA_GrBlendCoeff == *dstCoeff && srcAIsOne); |
| |
| bool covIsZero = !drawState.isCoverageDrawing() && |
| !(layout & GrDrawState::kCoverage_VertexLayoutBit) && |
| 0 == drawState.getCoverage(); |
| // When coeffs are (0,1) there is no reason to draw at all, unless |
| // stenciling is enabled. Having color writes disabled is effectively |
| // (0,1). The same applies when coverage is known to be 0. |
| if ((kZero_GrBlendCoeff == *srcCoeff && dstCoeffIsOne) || covIsZero) { |
| if (drawState.getStencil().doesWrite()) { |
| return kDisableBlend_BlendOptFlag | |
| kEmitTransBlack_BlendOptFlag; |
| } else { |
| return kSkipDraw_BlendOptFlag; |
| } |
| } |
| |
| // check for coverage due to constant coverage, per-vertex coverage, |
| // edge aa or coverage stage |
| bool hasCoverage = forceCoverage || |
| 0xffffffff != drawState.getCoverage() || |
| (layout & GrDrawState::kCoverage_VertexLayoutBit) || |
| (layout & GrDrawState::kEdge_VertexLayoutBit); |
| for (int s = drawState.getFirstCoverageStage(); |
| !hasCoverage && s < GrDrawState::kNumStages; |
| ++s) { |
| if (drawState.isStageEnabled(s)) { |
| hasCoverage = true; |
| } |
| } |
| |
| // if we don't have coverage we can check whether the dst |
| // has to read at all. If not, we'll disable blending. |
| if (!hasCoverage) { |
| if (dstCoeffIsZero) { |
| if (kOne_GrBlendCoeff == *srcCoeff) { |
| // if there is no coverage and coeffs are (1,0) then we |
| // won't need to read the dst at all, it gets replaced by src |
| return kDisableBlend_BlendOptFlag; |
| } else if (kZero_GrBlendCoeff == *srcCoeff) { |
| // if the op is "clear" then we don't need to emit a color |
| // or blend, just write transparent black into the dst. |
| *srcCoeff = kOne_GrBlendCoeff; |
| *dstCoeff = kZero_GrBlendCoeff; |
| return kDisableBlend_BlendOptFlag | kEmitTransBlack_BlendOptFlag; |
| } |
| } |
| } else if (drawState.isCoverageDrawing()) { |
| // we have coverage but we aren't distinguishing it from alpha by request. |
| return kCoverageAsAlpha_BlendOptFlag; |
| } else { |
| // check whether coverage can be safely rolled into alpha |
| // of if we can skip color computation and just emit coverage |
| if (this->canTweakAlphaForCoverage()) { |
| return kCoverageAsAlpha_BlendOptFlag; |
| } |
| if (dstCoeffIsZero) { |
| if (kZero_GrBlendCoeff == *srcCoeff) { |
| // the source color is not included in the blend |
| // the dst coeff is effectively zero so blend works out to: |
| // (c)(0)D + (1-c)D = (1-c)D. |
| *dstCoeff = kISA_GrBlendCoeff; |
| return kEmitCoverage_BlendOptFlag; |
| } else if (srcAIsOne) { |
| // the dst coeff is effectively zero so blend works out to: |
| // cS + (c)(0)D + (1-c)D = cS + (1-c)D. |
| // If Sa is 1 then we can replace Sa with c |
| // and set dst coeff to 1-Sa. |
| *dstCoeff = kISA_GrBlendCoeff; |
| return kCoverageAsAlpha_BlendOptFlag; |
| } |
| } else if (dstCoeffIsOne) { |
| // the dst coeff is effectively one so blend works out to: |
| // cS + (c)(1)D + (1-c)D = cS + D. |
| *dstCoeff = kOne_GrBlendCoeff; |
| return kCoverageAsAlpha_BlendOptFlag; |
| } |
| } |
| return kNone_BlendOpt; |
| } |
| |
| bool GrDrawTarget::willUseHWAALines() const { |
| // there is a conflict between using smooth lines and our use of |
| // premultiplied alpha. Smooth lines tweak the incoming alpha value |
| // but not in a premul-alpha way. So we only use them when our alpha |
| // is 0xff and tweaking the color for partial coverage is OK |
| if (!fCaps.hwAALineSupport() || |
| !this->getDrawState().isHWAntialiasState()) { |
| return false; |
| } |
| BlendOptFlags opts = this->getBlendOpts(); |
| return (kDisableBlend_BlendOptFlag & opts) && |
| (kCoverageAsAlpha_BlendOptFlag & opts); |
| } |
| |
| bool GrDrawTarget::canApplyCoverage() const { |
| // we can correctly apply coverage if a) we have dual source blending |
| // or b) one of our blend optimizations applies. |
| return this->getCaps().dualSourceBlendingSupport() || |
| kNone_BlendOpt != this->getBlendOpts(true); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void GrDrawTarget::drawIndexedInstances(GrPrimitiveType type, |
| int instanceCount, |
| int verticesPerInstance, |
| int indicesPerInstance, |
| const SkRect* devBounds) { |
| if (!verticesPerInstance || !indicesPerInstance) { |
| return; |
| } |
| |
| int maxInstancesPerDraw = this->indexCountInCurrentSource() / indicesPerInstance; |
| if (!maxInstancesPerDraw) { |
| return; |
| } |
| |
| DrawInfo info; |
| info.fPrimitiveType = type; |
| info.fStartIndex = 0; |
| info.fStartVertex = 0; |
| info.fIndicesPerInstance = indicesPerInstance; |
| info.fVerticesPerInstance = verticesPerInstance; |
| |
| // Set the same bounds for all the draws. |
| if (NULL != devBounds) { |
| info.setDevBounds(*devBounds); |
| } |
| |
| while (instanceCount) { |
| info.fInstanceCount = GrMin(instanceCount, maxInstancesPerDraw); |
| info.fVertexCount = info.fInstanceCount * verticesPerInstance; |
| info.fIndexCount = info.fInstanceCount * indicesPerInstance; |
| |
| if (this->checkDraw(type, |
| info.fStartVertex, |
| info.fStartIndex, |
| info.fVertexCount, |
| info.fIndexCount)) { |
| this->onDraw(info); |
| } |
| info.fStartVertex += info.fVertexCount; |
| instanceCount -= info.fInstanceCount; |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void GrDrawTarget::drawRect(const GrRect& rect, |
| const SkMatrix* matrix, |
| const GrRect* srcRects[], |
| const SkMatrix* srcMatrices[]) { |
| GrVertexLayout layout = 0; |
| uint32_t explicitCoordMask = 0; |
| |
| if (NULL != srcRects) { |
| for (int s = 0; s < GrDrawState::kNumStages; ++s) { |
| int numTC = 0; |
| if (NULL != srcRects[s]) { |
| layout |= GrDrawState::StageTexCoordVertexLayoutBit(s, numTC); |
| explicitCoordMask |= (1 << s); |
| ++numTC; |
| } |
| } |
| } |
| |
| GrDrawState::AutoViewMatrixRestore avmr; |
| if (NULL != matrix) { |
| avmr.set(this->drawState(), *matrix, explicitCoordMask); |
| } |
| |
| AutoReleaseGeometry geo(this, layout, 4, 0); |
| if (!geo.succeeded()) { |
| GrPrintf("Failed to get space for vertices!\n"); |
| return; |
| } |
| |
| int stageOffsets[GrDrawState::kNumStages]; |
| int vsize = GrDrawState::VertexSizeAndOffsetsByStage(layout, stageOffsets, NULL, NULL, NULL); |
| geo.positions()->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, vsize); |
| |
| for (int i = 0; i < GrDrawState::kNumStages; ++i) { |
| if (explicitCoordMask & (1 << i)) { |
| GrAssert(0 != stageOffsets[i]); |
| GrPoint* coords = GrTCast<GrPoint*>(GrTCast<intptr_t>(geo.vertices()) + |
| stageOffsets[i]); |
| coords->setRectFan(srcRects[i]->fLeft, srcRects[i]->fTop, |
| srcRects[i]->fRight, srcRects[i]->fBottom, |
| vsize); |
| if (NULL != srcMatrices && NULL != srcMatrices[i]) { |
| srcMatrices[i]->mapPointsWithStride(coords, vsize, 4); |
| } |
| } else { |
| GrAssert(0 == stageOffsets[i]); |
| } |
| } |
| |
| this->drawNonIndexed(kTriangleFan_GrPrimitiveType, 0, 4); |
| } |
| |
| void GrDrawTarget::clipWillBeSet(const GrClipData* clipData) { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| GrDrawTarget::AutoStateRestore::AutoStateRestore() { |
| fDrawTarget = NULL; |
| } |
| |
| GrDrawTarget::AutoStateRestore::AutoStateRestore(GrDrawTarget* target, |
| ASRInit init) { |
| fDrawTarget = NULL; |
| this->set(target, init); |
| } |
| |
| GrDrawTarget::AutoStateRestore::~AutoStateRestore() { |
| if (NULL != fDrawTarget) { |
| fDrawTarget->setDrawState(fSavedState); |
| fSavedState->unref(); |
| } |
| } |
| |
| void GrDrawTarget::AutoStateRestore::set(GrDrawTarget* target, ASRInit init) { |
| GrAssert(NULL == fDrawTarget); |
| fDrawTarget = target; |
| fSavedState = target->drawState(); |
| GrAssert(fSavedState); |
| fSavedState->ref(); |
| if (kReset_ASRInit == init) { |
| // calls the default cons |
| fTempState.init(); |
| } else { |
| GrAssert(kPreserve_ASRInit == init); |
| // calls the copy cons |
| fTempState.set(*fSavedState); |
| } |
| target->setDrawState(fTempState.get()); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry( |
| GrDrawTarget* target, |
| GrVertexLayout vertexLayout, |
| int vertexCount, |
| int indexCount) { |
| fTarget = NULL; |
| this->set(target, vertexLayout, vertexCount, indexCount); |
| } |
| |
| GrDrawTarget::AutoReleaseGeometry::AutoReleaseGeometry() { |
| fTarget = NULL; |
| } |
| |
| GrDrawTarget::AutoReleaseGeometry::~AutoReleaseGeometry() { |
| this->reset(); |
| } |
| |
| bool GrDrawTarget::AutoReleaseGeometry::set(GrDrawTarget* target, |
| GrVertexLayout vertexLayout, |
| int vertexCount, |
| int indexCount) { |
| this->reset(); |
| fTarget = target; |
| bool success = true; |
| if (NULL != fTarget) { |
| fTarget = target; |
| success = target->reserveVertexAndIndexSpace(vertexLayout, |
| vertexCount, |
| indexCount, |
| &fVertices, |
| &fIndices); |
| if (!success) { |
| fTarget = NULL; |
| this->reset(); |
| } |
| } |
| GrAssert(success == (NULL != fTarget)); |
| return success; |
| } |
| |
| void GrDrawTarget::AutoReleaseGeometry::reset() { |
| if (NULL != fTarget) { |
| if (NULL != fVertices) { |
| fTarget->resetVertexSource(); |
| } |
| if (NULL != fIndices) { |
| fTarget->resetIndexSource(); |
| } |
| fTarget = NULL; |
| } |
| fVertices = NULL; |
| fIndices = NULL; |
| } |
| |
| GrDrawTarget::AutoClipRestore::AutoClipRestore(GrDrawTarget* target, const SkIRect& newClip) { |
| fTarget = target; |
| fClip = fTarget->getClip(); |
| fStack.init(); |
| fStack.get()->clipDevRect(newClip, SkRegion::kReplace_Op); |
| fReplacementClip.fClipStack = fStack.get(); |
| target->setClip(&fReplacementClip); |
| } |
| |
| void GrDrawTarget::Caps::print() const { |
| static const char* gNY[] = {"NO", "YES"}; |
| GrPrintf("8 Bit Palette Support : %s\n", gNY[fInternals.f8BitPaletteSupport]); |
| GrPrintf("NPOT Texture Tile Support : %s\n", gNY[fInternals.fNPOTTextureTileSupport]); |
| GrPrintf("Two Sided Stencil Support : %s\n", gNY[fInternals.fTwoSidedStencilSupport]); |
| GrPrintf("Stencil Wrap Ops Support : %s\n", gNY[fInternals.fStencilWrapOpsSupport]); |
| GrPrintf("HW AA Lines Support : %s\n", gNY[fInternals.fHWAALineSupport]); |
| GrPrintf("Shader Derivative Support : %s\n", gNY[fInternals.fShaderDerivativeSupport]); |
| GrPrintf("Geometry Shader Support : %s\n", gNY[fInternals.fGeometryShaderSupport]); |
| GrPrintf("FSAA Support : %s\n", gNY[fInternals.fFSAASupport]); |
| GrPrintf("Dual Source Blending Support: %s\n", gNY[fInternals.fDualSourceBlendingSupport]); |
| GrPrintf("Buffer Lock Support : %s\n", gNY[fInternals.fBufferLockSupport]); |
| GrPrintf("Path Stenciling Support : %s\n", gNY[fInternals.fPathStencilingSupport]); |
| GrPrintf("Max Texture Size : %d\n", fInternals.fMaxTextureSize); |
| GrPrintf("Max Render Target Size : %d\n", fInternals.fMaxRenderTargetSize); |
| } |
