| OLD | NEW |
| (Empty) |
| 1 /* | |
| 2 * Copyright 2012 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "GrDrawState.h" | |
| 9 | |
| 10 #include "GrBlend.h" | |
| 11 #include "GrOptDrawState.h" | |
| 12 #include "GrPaint.h" | |
| 13 #include "GrProcOptInfo.h" | |
| 14 #include "GrXferProcessor.h" | |
| 15 #include "effects/GrPorterDuffXferProcessor.h" | |
| 16 | |
| 17 GrDrawState::GrDrawState() | |
| 18 : fFlagBits(0x0) | |
| 19 , fDrawFace(kBoth_DrawFace) | |
| 20 , fColorProcInfoValid(false) | |
| 21 , fCoverageProcInfoValid(false) | |
| 22 , fColorCache(GrColor_ILLEGAL) | |
| 23 , fCoverageCache(GrColor_ILLEGAL) | |
| 24 , fColorPrimProc(NULL) | |
| 25 , fCoveragePrimProc(NULL) { | |
| 26 SkDEBUGCODE(fBlockEffectRemovalCnt = 0;) | |
| 27 } | |
| 28 | |
| 29 GrDrawState& GrDrawState::operator=(const GrDrawState& that) { | |
| 30 fRenderTarget.reset(SkSafeRef(that.fRenderTarget.get())); | |
| 31 fFlagBits = that.fFlagBits; | |
| 32 fStencilSettings = that.fStencilSettings; | |
| 33 fDrawFace = that.fDrawFace; | |
| 34 fXPFactory.reset(SkRef(that.getXPFactory())); | |
| 35 fColorStages = that.fColorStages; | |
| 36 fCoverageStages = that.fCoverageStages; | |
| 37 | |
| 38 fColorProcInfoValid = that.fColorProcInfoValid; | |
| 39 fCoverageProcInfoValid = that.fCoverageProcInfoValid; | |
| 40 fColorCache = that.fColorCache; | |
| 41 fCoverageCache = that.fCoverageCache; | |
| 42 fColorPrimProc = that.fColorPrimProc; | |
| 43 fCoveragePrimProc = that.fCoveragePrimProc; | |
| 44 if (fColorProcInfoValid) { | |
| 45 fColorProcInfo = that.fColorProcInfo; | |
| 46 } | |
| 47 if (fCoverageProcInfoValid) { | |
| 48 fCoverageProcInfo = that.fCoverageProcInfo; | |
| 49 } | |
| 50 return *this; | |
| 51 } | |
| 52 | |
| 53 void GrDrawState::setFromPaint(const GrPaint& paint, GrRenderTarget* rt) { | |
| 54 SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numFragmentStages()); | |
| 55 | |
| 56 fColorStages.reset(); | |
| 57 fCoverageStages.reset(); | |
| 58 | |
| 59 for (int i = 0; i < paint.numColorStages(); ++i) { | |
| 60 fColorStages.push_back(paint.getColorStage(i)); | |
| 61 } | |
| 62 | |
| 63 for (int i = 0; i < paint.numCoverageStages(); ++i) { | |
| 64 fCoverageStages.push_back(paint.getCoverageStage(i)); | |
| 65 } | |
| 66 | |
| 67 fXPFactory.reset(SkRef(paint.getXPFactory())); | |
| 68 | |
| 69 this->setRenderTarget(rt); | |
| 70 | |
| 71 // These have no equivalent in GrPaint, set them to defaults | |
| 72 fDrawFace = kBoth_DrawFace; | |
| 73 fStencilSettings.setDisabled(); | |
| 74 fFlagBits = 0; | |
| 75 | |
| 76 // Enable the clip bit | |
| 77 this->enableState(GrDrawState::kClip_StateBit); | |
| 78 | |
| 79 this->setState(GrDrawState::kDither_StateBit, paint.isDither()); | |
| 80 this->setState(GrDrawState::kHWAntialias_StateBit, paint.isAntiAlias()); | |
| 81 | |
| 82 fColorProcInfoValid = false; | |
| 83 fCoverageProcInfoValid = false; | |
| 84 | |
| 85 fColorCache = GrColor_ILLEGAL; | |
| 86 fCoverageCache = GrColor_ILLEGAL; | |
| 87 | |
| 88 fColorPrimProc = NULL; | |
| 89 fCoveragePrimProc = NULL; | |
| 90 } | |
| 91 | |
| 92 //////////////////////////////////////////////////////////////////////////////// | |
| 93 | |
| 94 bool GrDrawState::canUseFracCoveragePrimProc(GrColor color, const GrDrawTargetCa
ps& caps) const { | |
| 95 if (caps.dualSourceBlendingSupport()) { | |
| 96 return true; | |
| 97 } | |
| 98 | |
| 99 this->calcColorInvariantOutput(color); | |
| 100 | |
| 101 // The coverage isn't actually white, its unknown, but this will produce the
same effect | |
| 102 // TODO we want to cache the result of this call, but we can probably clean
up the interface | |
| 103 // so we don't have to pass in a seemingly known coverage | |
| 104 this->calcCoverageInvariantOutput(GrColor_WHITE); | |
| 105 return this->getXPFactory()->canApplyCoverage(fColorProcInfo, fCoverageProcI
nfo); | |
| 106 } | |
| 107 | |
| 108 //////////////////////////////////////////////////////////////////////////////s | |
| 109 | |
| 110 bool GrDrawState::willEffectReadDstColor() const { | |
| 111 return this->getXPFactory()->willReadDst(); | |
| 112 } | |
| 113 | |
| 114 void GrDrawState::AutoRestoreEffects::set(GrDrawState* ds) { | |
| 115 if (fDrawState) { | |
| 116 int m = fDrawState->numColorStages() - fColorEffectCnt; | |
| 117 SkASSERT(m >= 0); | |
| 118 fDrawState->fColorStages.pop_back_n(m); | |
| 119 | |
| 120 int n = fDrawState->numCoverageStages() - fCoverageEffectCnt; | |
| 121 SkASSERT(n >= 0); | |
| 122 fDrawState->fCoverageStages.pop_back_n(n); | |
| 123 if (m + n > 0) { | |
| 124 fDrawState->fColorProcInfoValid = false; | |
| 125 fDrawState->fCoverageProcInfoValid = false; | |
| 126 } | |
| 127 SkDEBUGCODE(--fDrawState->fBlockEffectRemovalCnt;) | |
| 128 } | |
| 129 fDrawState = ds; | |
| 130 if (NULL != ds) { | |
| 131 fColorEffectCnt = ds->numColorStages(); | |
| 132 fCoverageEffectCnt = ds->numCoverageStages(); | |
| 133 SkDEBUGCODE(++ds->fBlockEffectRemovalCnt;) | |
| 134 } | |
| 135 } | |
| 136 | |
| 137 //////////////////////////////////////////////////////////////////////////////// | |
| 138 | |
| 139 // Some blend modes allow folding a fractional coverage value into the color's a
lpha channel, while | |
| 140 // others will blend incorrectly. | |
| 141 bool GrDrawState::canTweakAlphaForCoverage() const { | |
| 142 return this->getXPFactory()->canTweakAlphaForCoverage(); | |
| 143 } | |
| 144 | |
| 145 //////////////////////////////////////////////////////////////////////////////// | |
| 146 | |
| 147 GrDrawState::~GrDrawState() { | |
| 148 SkASSERT(0 == fBlockEffectRemovalCnt); | |
| 149 } | |
| 150 | |
| 151 //////////////////////////////////////////////////////////////////////////////// | |
| 152 | |
| 153 bool GrDrawState::willBlendWithDst(const GrPrimitiveProcessor* pp) const { | |
| 154 this->calcColorInvariantOutput(pp); | |
| 155 this->calcCoverageInvariantOutput(pp); | |
| 156 | |
| 157 GrXPFactory::InvariantOutput output; | |
| 158 fXPFactory->getInvariantOutput(fColorProcInfo, fCoverageProcInfo, &output); | |
| 159 return output.fWillBlendWithDst; | |
| 160 } | |
| 161 | |
| 162 void GrDrawState::calcColorInvariantOutput(const GrPrimitiveProcessor* pp) const
{ | |
| 163 if (!fColorProcInfoValid || fColorPrimProc != pp) { | |
| 164 fColorProcInfo.calcColorWithPrimProc(pp, fColorStages.begin(), this->num
ColorStages()); | |
| 165 fColorProcInfoValid = true; | |
| 166 fColorPrimProc = pp; | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 void GrDrawState::calcCoverageInvariantOutput(const GrPrimitiveProcessor* pp) co
nst { | |
| 171 if (!fCoverageProcInfoValid || fCoveragePrimProc != pp) { | |
| 172 fCoverageProcInfo.calcCoverageWithPrimProc(pp, fCoverageStages.begin(), | |
| 173 this->numCoverageStages()); | |
| 174 fCoverageProcInfoValid = true; | |
| 175 fCoveragePrimProc = pp; | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 void GrDrawState::calcColorInvariantOutput(GrColor color) const { | |
| 180 if (!fColorProcInfoValid || color != fColorCache) { | |
| 181 GrColorComponentFlags flags = kRGBA_GrColorComponentFlags; | |
| 182 fColorProcInfo.calcWithInitialValues(fColorStages.begin(), this->numColo
rStages(), color, | |
| 183 flags, false); | |
| 184 fColorProcInfoValid = true; | |
| 185 fColorCache = color; | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 void GrDrawState::calcCoverageInvariantOutput(GrColor coverage) const { | |
| 190 if (!fCoverageProcInfoValid || coverage != fCoverageCache) { | |
| 191 GrColorComponentFlags flags = kRGBA_GrColorComponentFlags; | |
| 192 fCoverageProcInfo.calcWithInitialValues(fCoverageStages.begin(), | |
| 193 this->numCoverageStages(), cover
age, flags, | |
| 194 true); | |
| 195 fCoverageProcInfoValid = true; | |
| 196 fCoverageCache = coverage; | |
| 197 } | |
| 198 } | |
| OLD | NEW |