| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrDrawState.h" |
| #include "GrPaint.h" |
| #include "GrDrawTargetCaps.h" |
| |
| //////////////////////////////////////////////////////////////////////////////s |
| |
| bool GrDrawState::State::HaveCompatibleState(const State& a, const State& b, |
| bool explicitLocalCoords) { |
| if (a.fColorStages.count() != b.fColorStages.count() || |
| a.fCoverageStages.count() != b.fCoverageStages.count() || |
| a.fSrcBlend != b.fSrcBlend || |
| a.fDstBlend != b.fDstBlend) { |
| return false; |
| } |
| for (int i = 0; i < a.fColorStages.count(); i++) { |
| if (!GrEffectStage::AreCompatible(a.fColorStages[i], b.fColorStages[i], |
| explicitLocalCoords)) { |
| return false; |
| } |
| } |
| for (int i = 0; i < a.fCoverageStages.count(); i++) { |
| if (!GrEffectStage::AreCompatible(a.fCoverageStages[i], b.fCoverageStages[i], |
| explicitLocalCoords)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| //////////////////////////////////////////////////////////////////////////////s |
| GrDrawState::CombinedState GrDrawState::CombineIfPossible( |
| const GrDrawState& a, const GrDrawState& b, const GrDrawTargetCaps& caps) { |
| |
| bool usingVertexColors = a.hasColorVertexAttribute(); |
| if (!usingVertexColors && a.fColor != b.fColor) { |
| return kIncompatible_CombinedState; |
| } |
| |
| if (a.fRenderTarget.get() != b.fRenderTarget.get() || |
| !a.fViewMatrix.cheapEqualTo(b.fViewMatrix) || |
| a.fBlendConstant != b.fBlendConstant || |
| a.fFlagBits != b.fFlagBits || |
| a.fVACount != b.fVACount || |
| memcmp(a.fVAPtr, b.fVAPtr, a.fVACount * sizeof(GrVertexAttrib)) || |
| a.fStencilSettings != b.fStencilSettings || |
| a.fDrawFace != b.fDrawFace) { |
| return kIncompatible_CombinedState; |
| } |
| |
| bool usingVertexCoverage = a.hasCoverageVertexAttribute(); |
| if (!usingVertexCoverage && a.fCoverage != b.fCoverage) { |
| return kIncompatible_CombinedState; |
| } |
| |
| bool explicitLocalCoords = a.hasLocalCoordAttribute(); |
| |
| SkASSERT(0 == memcmp(a.fFixedFunctionVertexAttribIndices, |
| b.fFixedFunctionVertexAttribIndices, |
| sizeof(a.fFixedFunctionVertexAttribIndices))); |
| if (!State::HaveCompatibleState(a.fState, b.fState, explicitLocalCoords)) { |
| return kIncompatible_CombinedState; |
| } |
| |
| if (usingVertexColors) { |
| // If one is opaque and the other is not then the combined state is not opaque. Moreover, |
| // if the opaqueness affects the ability to get color/coverage blending correct then we |
| // don't combine the draw states. |
| bool aIsOpaque = (kVertexColorsAreOpaque_Hint & a.fHints); |
| bool bIsOpaque = (kVertexColorsAreOpaque_Hint & b.fHints); |
| if (aIsOpaque != bIsOpaque) { |
| const GrDrawState* opaque; |
| const GrDrawState* nonOpaque; |
| if (aIsOpaque) { |
| opaque = &a; |
| nonOpaque = &b; |
| } else { |
| opaque = &b; |
| nonOpaque = &a; |
| } |
| if (!opaque->hasSolidCoverage() && opaque->couldApplyCoverage(caps)) { |
| SkASSERT(!nonOpaque->hasSolidCoverage()); |
| if (!nonOpaque->couldApplyCoverage(caps)) { |
| return kIncompatible_CombinedState; |
| } |
| } |
| return aIsOpaque ? kB_CombinedState : kA_CombinedState; |
| } |
| } |
| return kAOrB_CombinedState; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////s |
| |
| GrDrawState::GrDrawState(const GrDrawState& state, const SkMatrix& preConcatMatrix) { |
| SkDEBUGCODE(fBlockEffectRemovalCnt = 0;) |
| *this = state; |
| if (!preConcatMatrix.isIdentity()) { |
| for (int i = 0; i < this->numColorStages(); ++i) { |
| fState.fColorStages[i].localCoordChange(preConcatMatrix); |
| } |
| for (int i = 0; i < this->numCoverageStages(); ++i) { |
| fState.fCoverageStages[i].localCoordChange(preConcatMatrix); |
| } |
| this->invalidateBlendOptFlags(); |
| } |
| } |
| |
| GrDrawState& GrDrawState::operator=(const GrDrawState& that) { |
| SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numTotalStages()); |
| this->setRenderTarget(that.fRenderTarget.get()); |
| fColor = that.fColor; |
| fViewMatrix = that.fViewMatrix; |
| fBlendConstant = that.fBlendConstant; |
| fFlagBits = that.fFlagBits; |
| fVACount = that.fVACount; |
| fVAPtr = that.fVAPtr; |
| fStencilSettings = that.fStencilSettings; |
| fCoverage = that.fCoverage; |
| fDrawFace = that.fDrawFace; |
| fOptSrcBlend = that.fOptSrcBlend; |
| fOptDstBlend = that.fOptDstBlend; |
| fBlendOptFlags = that.fBlendOptFlags; |
| |
| fState = that.fState; |
| fHints = that.fHints; |
| |
| memcpy(fFixedFunctionVertexAttribIndices, |
| that.fFixedFunctionVertexAttribIndices, |
| sizeof(fFixedFunctionVertexAttribIndices)); |
| return *this; |
| } |
| |
| void GrDrawState::onReset(const SkMatrix* initialViewMatrix) { |
| SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numTotalStages()); |
| fState.reset(); |
| |
| fRenderTarget.reset(NULL); |
| |
| this->setDefaultVertexAttribs(); |
| |
| fColor = 0xffffffff; |
| if (NULL == initialViewMatrix) { |
| fViewMatrix.reset(); |
| } else { |
| fViewMatrix = *initialViewMatrix; |
| } |
| fBlendConstant = 0x0; |
| fFlagBits = 0x0; |
| fStencilSettings.setDisabled(); |
| fCoverage = 0xffffffff; |
| fDrawFace = kBoth_DrawFace; |
| |
| fHints = 0; |
| |
| this->invalidateBlendOptFlags(); |
| } |
| |
| bool GrDrawState::setIdentityViewMatrix() { |
| if (this->numTotalStages()) { |
| SkMatrix invVM; |
| if (!fViewMatrix.invert(&invVM)) { |
| // sad trombone sound |
| return false; |
| } |
| for (int s = 0; s < this->numColorStages(); ++s) { |
| fState.fColorStages[s].localCoordChange(invVM); |
| } |
| for (int s = 0; s < this->numCoverageStages(); ++s) { |
| fState.fCoverageStages[s].localCoordChange(invVM); |
| } |
| } |
| fViewMatrix.reset(); |
| return true; |
| } |
| |
| void GrDrawState::setFromPaint(const GrPaint& paint, const SkMatrix& vm, GrRenderTarget* rt) { |
| SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numTotalStages()); |
| |
| fState.reset(); |
| |
| for (int i = 0; i < paint.numColorStages(); ++i) { |
| fState.fColorStages.push_back(paint.getColorStage(i)); |
| } |
| |
| for (int i = 0; i < paint.numCoverageStages(); ++i) { |
| fState.fCoverageStages.push_back(paint.getCoverageStage(i)); |
| } |
| |
| this->setRenderTarget(rt); |
| |
| fViewMatrix = vm; |
| |
| // These have no equivalent in GrPaint, set them to defaults |
| fBlendConstant = 0x0; |
| fDrawFace = kBoth_DrawFace; |
| fStencilSettings.setDisabled(); |
| this->resetStateFlags(); |
| fHints = 0; |
| |
| // Enable the clip bit |
| this->enableState(GrDrawState::kClip_StateBit); |
| |
| this->setColor(paint.getColor()); |
| this->setState(GrDrawState::kDither_StateBit, paint.isDither()); |
| this->setState(GrDrawState::kHWAntialias_StateBit, paint.isAntiAlias()); |
| |
| this->setBlendFunc(paint.getSrcBlendCoeff(), paint.getDstBlendCoeff()); |
| this->setCoverage(paint.getCoverage()); |
| this->invalidateBlendOptFlags(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| static size_t vertex_size(const GrVertexAttrib* attribs, int count) { |
| // this works as long as we're 4 byte-aligned |
| #ifdef SK_DEBUG |
| uint32_t overlapCheck = 0; |
| #endif |
| SkASSERT(count <= GrDrawState::kMaxVertexAttribCnt); |
| size_t size = 0; |
| for (int index = 0; index < count; ++index) { |
| size_t attribSize = GrVertexAttribTypeSize(attribs[index].fType); |
| size += attribSize; |
| #ifdef SK_DEBUG |
| size_t dwordCount = attribSize >> 2; |
| uint32_t mask = (1 << dwordCount)-1; |
| size_t offsetShift = attribs[index].fOffset >> 2; |
| SkASSERT(!(overlapCheck & (mask << offsetShift))); |
| overlapCheck |= (mask << offsetShift); |
| #endif |
| } |
| return size; |
| } |
| |
| size_t GrDrawState::getVertexSize() const { |
| return vertex_size(fVAPtr, fVACount); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void GrDrawState::setVertexAttribs(const GrVertexAttrib* attribs, int count) { |
| SkASSERT(count <= kMaxVertexAttribCnt); |
| |
| fVAPtr = attribs; |
| fVACount = count; |
| |
| // Set all the indices to -1 |
| memset(fFixedFunctionVertexAttribIndices, |
| 0xff, |
| sizeof(fFixedFunctionVertexAttribIndices)); |
| #ifdef SK_DEBUG |
| uint32_t overlapCheck = 0; |
| #endif |
| for (int i = 0; i < count; ++i) { |
| if (attribs[i].fBinding < kGrFixedFunctionVertexAttribBindingCnt) { |
| // The fixed function attribs can only be specified once |
| SkASSERT(-1 == fFixedFunctionVertexAttribIndices[attribs[i].fBinding]); |
| SkASSERT(GrFixedFunctionVertexAttribVectorCount(attribs[i].fBinding) == |
| GrVertexAttribTypeVectorCount(attribs[i].fType)); |
| fFixedFunctionVertexAttribIndices[attribs[i].fBinding] = i; |
| } |
| #ifdef SK_DEBUG |
| size_t dwordCount = GrVertexAttribTypeSize(attribs[i].fType) >> 2; |
| uint32_t mask = (1 << dwordCount)-1; |
| size_t offsetShift = attribs[i].fOffset >> 2; |
| SkASSERT(!(overlapCheck & (mask << offsetShift))); |
| overlapCheck |= (mask << offsetShift); |
| #endif |
| } |
| this->invalidateBlendOptFlags(); |
| // Positions must be specified. |
| SkASSERT(-1 != fFixedFunctionVertexAttribIndices[kPosition_GrVertexAttribBinding]); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void GrDrawState::setDefaultVertexAttribs() { |
| static const GrVertexAttrib kPositionAttrib = |
| {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}; |
| |
| fVAPtr = &kPositionAttrib; |
| fVACount = 1; |
| |
| // set all the fixed function indices to -1 except position. |
| memset(fFixedFunctionVertexAttribIndices, |
| 0xff, |
| sizeof(fFixedFunctionVertexAttribIndices)); |
| fFixedFunctionVertexAttribIndices[kPosition_GrVertexAttribBinding] = 0; |
| this->invalidateBlendOptFlags(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool GrDrawState::validateVertexAttribs() const { |
| // check consistency of effects and attributes |
| GrSLType slTypes[kMaxVertexAttribCnt]; |
| for (int i = 0; i < kMaxVertexAttribCnt; ++i) { |
| slTypes[i] = static_cast<GrSLType>(-1); |
| } |
| int totalStages = this->numTotalStages(); |
| for (int s = 0; s < totalStages; ++s) { |
| int covIdx = s - this->numColorStages(); |
| const GrEffectStage& stage = covIdx < 0 ? this->getColorStage(s) : |
| this->getCoverageStage(covIdx); |
| const GrEffect* effect = stage.getEffect(); |
| SkASSERT(NULL != effect); |
| // make sure that any attribute indices have the correct binding type, that the attrib |
| // type and effect's shader lang type are compatible, and that attributes shared by |
| // multiple effects use the same shader lang type. |
| const int* attributeIndices = stage.getVertexAttribIndices(); |
| int numAttributes = stage.getVertexAttribIndexCount(); |
| for (int i = 0; i < numAttributes; ++i) { |
| int attribIndex = attributeIndices[i]; |
| if (attribIndex >= fVACount || |
| kEffect_GrVertexAttribBinding != fVAPtr[attribIndex].fBinding) { |
| return false; |
| } |
| |
| GrSLType effectSLType = effect->vertexAttribType(i); |
| GrVertexAttribType attribType = fVAPtr[attribIndex].fType; |
| int slVecCount = GrSLTypeVectorCount(effectSLType); |
| int attribVecCount = GrVertexAttribTypeVectorCount(attribType); |
| if (slVecCount != attribVecCount || |
| (static_cast<GrSLType>(-1) != slTypes[attribIndex] && |
| slTypes[attribIndex] != effectSLType)) { |
| return false; |
| } |
| slTypes[attribIndex] = effectSLType; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool GrDrawState::willEffectReadDstColor() const { |
| if (!this->isColorWriteDisabled()) { |
| for (int s = 0; s < this->numColorStages(); ++s) { |
| if (this->getColorStage(s).getEffect()->willReadDstColor()) { |
| return true; |
| } |
| } |
| } |
| for (int s = 0; s < this->numCoverageStages(); ++s) { |
| if (this->getCoverageStage(s).getEffect()->willReadDstColor()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| bool GrDrawState::couldApplyCoverage(const GrDrawTargetCaps& caps) const { |
| if (caps.dualSourceBlendingSupport()) { |
| return true; |
| } |
| // we can correctly apply coverage if a) we have dual source blending |
| // or b) one of our blend optimizations applies |
| // or c) the src, dst blend coeffs are 1,0 and we will read Dst Color |
| GrBlendCoeff srcCoeff; |
| GrBlendCoeff dstCoeff; |
| GrDrawState::BlendOptFlags flag = this->getBlendOpts(true, &srcCoeff, &dstCoeff); |
| return GrDrawState::kNone_BlendOpt != flag || |
| (this->willEffectReadDstColor() && |
| kOne_GrBlendCoeff == srcCoeff && kZero_GrBlendCoeff == dstCoeff); |
| } |
| |
| bool GrDrawState::srcAlphaWillBeOne() const { |
| uint32_t validComponentFlags; |
| GrColor color; |
| // Check if per-vertex or constant color may have partial alpha |
| if (this->hasColorVertexAttribute()) { |
| if (fHints & kVertexColorsAreOpaque_Hint) { |
| validComponentFlags = kA_GrColorComponentFlag; |
| color = 0xFF << GrColor_SHIFT_A; |
| } else { |
| validComponentFlags = 0; |
| color = 0; // not strictly necessary but we get false alarms from tools about uninit. |
| } |
| } else { |
| validComponentFlags = kRGBA_GrColorComponentFlags; |
| color = this->getColor(); |
| } |
| |
| // Run through the color stages |
| for (int s = 0; s < this->numColorStages(); ++s) { |
| const GrEffect* effect = this->getColorStage(s).getEffect(); |
| effect->getConstantColorComponents(&color, &validComponentFlags); |
| } |
| |
| // Check whether coverage is treated as color. If so we run through the coverage computation. |
| if (this->isCoverageDrawing()) { |
| GrColor coverageColor = this->getCoverageColor(); |
| GrColor oldColor = color; |
| color = 0; |
| for (int c = 0; c < 4; ++c) { |
| if (validComponentFlags & (1 << c)) { |
| U8CPU a = (oldColor >> (c * 8)) & 0xff; |
| U8CPU b = (coverageColor >> (c * 8)) & 0xff; |
| color |= (SkMulDiv255Round(a, b) << (c * 8)); |
| } |
| } |
| for (int s = 0; s < this->numCoverageStages(); ++s) { |
| const GrEffect* effect = this->getCoverageStage(s).getEffect(); |
| effect->getConstantColorComponents(&color, &validComponentFlags); |
| } |
| } |
| return (kA_GrColorComponentFlag & validComponentFlags) && 0xff == GrColorUnpackA(color); |
| } |
| |
| bool GrDrawState::hasSolidCoverage() const { |
| // If we're drawing coverage directly then coverage is effectively treated as color. |
| if (this->isCoverageDrawing()) { |
| return true; |
| } |
| |
| GrColor coverage; |
| uint32_t validComponentFlags; |
| // Initialize to an unknown starting coverage if per-vertex coverage is specified. |
| if (this->hasCoverageVertexAttribute()) { |
| validComponentFlags = 0; |
| } else { |
| coverage = fCoverage; |
| validComponentFlags = kRGBA_GrColorComponentFlags; |
| } |
| |
| // Run through the coverage stages and see if the coverage will be all ones at the end. |
| for (int s = 0; s < this->numCoverageStages(); ++s) { |
| const GrEffect* effect = this->getCoverageStage(s).getEffect(); |
| effect->getConstantColorComponents(&coverage, &validComponentFlags); |
| } |
| return (kRGBA_GrColorComponentFlags == validComponentFlags) && (0xffffffff == coverage); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| // Some blend modes allow folding a fractional coverage value into the color's alpha channel, while |
| // others will blend incorrectly. |
| bool GrDrawState::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 destination when applied to S' and D. |
| Also, if we're directly rendering coverage (isCoverageDrawing) then coverage is treated as |
| color by definition. |
| */ |
| return kOne_GrBlendCoeff == fState.fDstBlend || |
| kISA_GrBlendCoeff == fState.fDstBlend || |
| kISC_GrBlendCoeff == fState.fDstBlend || |
| this->isCoverageDrawing(); |
| } |
| |
| GrDrawState::BlendOptFlags GrDrawState::getBlendOpts(bool forceCoverage, |
| GrBlendCoeff* srcCoeff, |
| GrBlendCoeff* dstCoeff) const { |
| GrBlendCoeff bogusSrcCoeff, bogusDstCoeff; |
| if (NULL == srcCoeff) { |
| srcCoeff = &bogusSrcCoeff; |
| } |
| if (NULL == dstCoeff) { |
| dstCoeff = &bogusDstCoeff; |
| } |
| |
| if (forceCoverage) { |
| return this->calcBlendOpts(true, srcCoeff, dstCoeff); |
| } |
| |
| if (0 == (fBlendOptFlags & kInvalid_BlendOptFlag)) { |
| *srcCoeff = fOptSrcBlend; |
| *dstCoeff = fOptDstBlend; |
| return fBlendOptFlags; |
| } |
| |
| fBlendOptFlags = this->calcBlendOpts(forceCoverage, srcCoeff, dstCoeff); |
| fOptSrcBlend = *srcCoeff; |
| fOptDstBlend = *dstCoeff; |
| |
| return fBlendOptFlags; |
| } |
| |
| GrDrawState::BlendOptFlags GrDrawState::calcBlendOpts(bool forceCoverage, |
| GrBlendCoeff* srcCoeff, |
| GrBlendCoeff* dstCoeff) const { |
| *srcCoeff = this->getSrcBlendCoeff(); |
| *dstCoeff = this->getDstBlendCoeff(); |
| |
| if (this->isColorWriteDisabled()) { |
| *srcCoeff = kZero_GrBlendCoeff; |
| *dstCoeff = kOne_GrBlendCoeff; |
| } |
| |
| bool srcAIsOne = this->srcAlphaWillBeOne(); |
| bool dstCoeffIsOne = kOne_GrBlendCoeff == *dstCoeff || |
| (kSA_GrBlendCoeff == *dstCoeff && srcAIsOne); |
| bool dstCoeffIsZero = kZero_GrBlendCoeff == *dstCoeff || |
| (kISA_GrBlendCoeff == *dstCoeff && srcAIsOne); |
| |
| // 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). |
| if ((kZero_GrBlendCoeff == *srcCoeff && dstCoeffIsOne)) { |
| if (this->getStencil().doesWrite()) { |
| return kEmitCoverage_BlendOptFlag; |
| } else { |
| return kSkipDraw_BlendOptFlag; |
| } |
| } |
| |
| bool hasCoverage = forceCoverage || !this->hasSolidCoverage(); |
| |
| // 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 |
| *dstCoeff = kZero_GrBlendCoeff; |
| return kNone_BlendOpt; |
| } 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 kEmitTransBlack_BlendOptFlag; |
| } |
| } |
| } else if (this->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 GrDrawState::canIgnoreColorAttribute() const { |
| if (fBlendOptFlags & kInvalid_BlendOptFlag) { |
| this->getBlendOpts(); |
| } |
| return SkToBool(fBlendOptFlags & (GrDrawState::kEmitTransBlack_BlendOptFlag | |
| GrDrawState::kEmitCoverage_BlendOptFlag)); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| GrDrawState::AutoVertexAttribRestore::AutoVertexAttribRestore( |
| GrDrawState* drawState) { |
| SkASSERT(NULL != drawState); |
| fDrawState = drawState; |
| fVAPtr = drawState->fVAPtr; |
| fVACount = drawState->fVACount; |
| fDrawState->setDefaultVertexAttribs(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////s |
| |
| void GrDrawState::AutoRestoreEffects::set(GrDrawState* ds) { |
| if (NULL != fDrawState) { |
| int m = fDrawState->numColorStages() - fColorEffectCnt; |
| SkASSERT(m >= 0); |
| fDrawState->fState.fColorStages.pop_back_n(m); |
| |
| int n = fDrawState->numCoverageStages() - fCoverageEffectCnt; |
| SkASSERT(n >= 0); |
| fDrawState->fState.fCoverageStages.pop_back_n(n); |
| if (m + n > 0) { |
| fDrawState->invalidateBlendOptFlags(); |
| } |
| SkDEBUGCODE(--fDrawState->fBlockEffectRemovalCnt;) |
| } |
| fDrawState = ds; |
| if (NULL != ds) { |
| fColorEffectCnt = ds->numColorStages(); |
| fCoverageEffectCnt = ds->numCoverageStages(); |
| SkDEBUGCODE(++ds->fBlockEffectRemovalCnt;) |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void GrDrawState::AutoViewMatrixRestore::restore() { |
| if (NULL != fDrawState) { |
| SkDEBUGCODE(--fDrawState->fBlockEffectRemovalCnt;) |
| fDrawState->fViewMatrix = fViewMatrix; |
| SkASSERT(fDrawState->numColorStages() >= fNumColorStages); |
| int numCoverageStages = fSavedCoordChanges.count() - fNumColorStages; |
| SkASSERT(fDrawState->numCoverageStages() >= numCoverageStages); |
| |
| int i = 0; |
| for (int s = 0; s < fNumColorStages; ++s, ++i) { |
| fDrawState->fState.fColorStages[s].restoreCoordChange(fSavedCoordChanges[i]); |
| } |
| for (int s = 0; s < numCoverageStages; ++s, ++i) { |
| fDrawState->fState.fCoverageStages[s].restoreCoordChange(fSavedCoordChanges[i]); |
| } |
| fDrawState = NULL; |
| } |
| } |
| |
| void GrDrawState::AutoViewMatrixRestore::set(GrDrawState* drawState, |
| const SkMatrix& preconcatMatrix) { |
| this->restore(); |
| |
| SkASSERT(NULL == fDrawState); |
| if (NULL == drawState || preconcatMatrix.isIdentity()) { |
| return; |
| } |
| fDrawState = drawState; |
| |
| fViewMatrix = drawState->getViewMatrix(); |
| drawState->fViewMatrix.preConcat(preconcatMatrix); |
| |
| this->doEffectCoordChanges(preconcatMatrix); |
| SkDEBUGCODE(++fDrawState->fBlockEffectRemovalCnt;) |
| } |
| |
| bool GrDrawState::AutoViewMatrixRestore::setIdentity(GrDrawState* drawState) { |
| this->restore(); |
| |
| if (NULL == drawState) { |
| return false; |
| } |
| |
| if (drawState->getViewMatrix().isIdentity()) { |
| return true; |
| } |
| |
| fViewMatrix = drawState->getViewMatrix(); |
| if (0 == drawState->numTotalStages()) { |
| drawState->fViewMatrix.reset(); |
| fDrawState = drawState; |
| fNumColorStages = 0; |
| fSavedCoordChanges.reset(0); |
| SkDEBUGCODE(++fDrawState->fBlockEffectRemovalCnt;) |
| return true; |
| } else { |
| SkMatrix inv; |
| if (!fViewMatrix.invert(&inv)) { |
| return false; |
| } |
| drawState->fViewMatrix.reset(); |
| fDrawState = drawState; |
| this->doEffectCoordChanges(inv); |
| SkDEBUGCODE(++fDrawState->fBlockEffectRemovalCnt;) |
| return true; |
| } |
| } |
| |
| void GrDrawState::AutoViewMatrixRestore::doEffectCoordChanges(const SkMatrix& coordChangeMatrix) { |
| fSavedCoordChanges.reset(fDrawState->numTotalStages()); |
| int i = 0; |
| |
| fNumColorStages = fDrawState->numColorStages(); |
| for (int s = 0; s < fNumColorStages; ++s, ++i) { |
| fDrawState->getColorStage(s).saveCoordChange(&fSavedCoordChanges[i]); |
| fDrawState->fState.fColorStages[s].localCoordChange(coordChangeMatrix); |
| } |
| |
| int numCoverageStages = fDrawState->numCoverageStages(); |
| for (int s = 0; s < numCoverageStages; ++s, ++i) { |
| fDrawState->getCoverageStage(s).saveCoordChange(&fSavedCoordChanges[i]); |
| fDrawState->fState.fCoverageStages[s].localCoordChange(coordChangeMatrix); |
| } |
| } |
