std::unique_ptr<GrAtlasTextOp> GrAtlasTextOp::MakeDistanceField(
GrContext* context,
GrPaint&& paint,
int glyphCount,
const GrDistanceFieldAdjustTable* distanceAdjustTable,
bool useGammaCorrectDistanceTable,
SkColor luminanceColor,
const SkSurfaceProps& props,
bool isAntiAliased,
bool useLCD) {
GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();
std::unique_ptr<GrAtlasTextOp> op = pool->allocate<GrAtlasTextOp>(std::move(paint));
bool isBGR = SkPixelGeometryIsBGR(props.pixelGeometry());
bool isLCD = useLCD && SkPixelGeometryIsH(props.pixelGeometry());
op->fMaskType = !isAntiAliased ? kAliasedDistanceField_MaskType
: isLCD ? (isBGR ? kLCDBGRDistanceField_MaskType
: kLCDDistanceField_MaskType)
: kGrayscaleDistanceField_MaskType;
op->fDistanceAdjustTable.reset(SkRef(distanceAdjustTable));
op->fUseGammaCorrectDistanceTable = useGammaCorrectDistanceTable;
op->fLuminanceColor = luminanceColor;
op->fNumGlyphs = glyphCount;
op->fGeoCount = 1;
return op;
}
void GrDistanceFieldTextContext::setupCoverageEffect(const SkColor& filteredColor) {
GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
GrTextureParams gammaParams(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
uint32_t textureUniqueID = fCurrTexture->getUniqueID();
const SkMatrix& ctm = fContext->getMatrix();
// set up any flags
uint32_t flags = 0;
flags |= ctm.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
flags |= fUseLCDText ? kUseLCD_DistanceFieldEffectFlag : 0;
flags |= fUseLCDText && ctm.rectStaysRect() ?
kRectToRect_DistanceFieldEffectFlag : 0;
bool useBGR = SkPixelGeometryIsBGR(fDeviceProperties.pixelGeometry());
flags |= fUseLCDText && useBGR ? kBGR_DistanceFieldEffectFlag : 0;
// see if we need to create a new effect
if (textureUniqueID != fEffectTextureUniqueID ||
filteredColor != fEffectColor ||
flags != fEffectFlags) {
if (fUseLCDText) {
GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
fCachedGeometryProcessor.reset(GrDistanceFieldLCDTextureEffect::Create(fCurrTexture,
params,
fGammaTexture,
gammaParams,
colorNoPreMul,
flags));
} else {
#ifdef SK_GAMMA_APPLY_TO_A8
U8CPU lum = SkColorSpaceLuminance::computeLuminance(fDeviceProperties.gamma(),
filteredColor);
fCachedGeometryProcessor.reset(GrDistanceFieldTextureEffect::Create(fCurrTexture,
params,
fGammaTexture,
gammaParams,
lum/255.f,
flags));
#else
fCachedGeometryProcessor.reset(GrDistanceFieldNoGammaTextureEffect::Create(fCurrTexture,
params, flags));
#endif
}
fEffectTextureUniqueID = textureUniqueID;
fEffectColor = filteredColor;
fEffectFlags = flags;
}
}
inline GrDrawBatch* GrAtlasTextBlob::createBatch(
const Run::SubRunInfo& info,
int glyphCount, int run, int subRun,
const SkMatrix& viewMatrix, SkScalar x, SkScalar y,
GrColor color,
const SkPaint& skPaint, const SkSurfaceProps& props,
const GrDistanceFieldAdjustTable* distanceAdjustTable,
bool useGammaCorrectDistanceTable,
GrBatchFontCache* cache) {
GrMaskFormat format = info.maskFormat();
GrColor subRunColor;
if (kARGB_GrMaskFormat == format) {
uint8_t paintAlpha = skPaint.getAlpha();
subRunColor = SkColorSetARGB(paintAlpha, paintAlpha, paintAlpha, paintAlpha);
} else {
subRunColor = color;
}
GrAtlasTextBatch* batch;
if (info.drawAsDistanceFields()) {
SkColor filteredColor;
SkColorFilter* colorFilter = skPaint.getColorFilter();
if (colorFilter) {
filteredColor = colorFilter->filterColor(skPaint.getColor());
} else {
filteredColor = skPaint.getColor();
}
bool useBGR = SkPixelGeometryIsBGR(props.pixelGeometry());
batch = GrAtlasTextBatch::CreateDistanceField(glyphCount, cache,
distanceAdjustTable,
useGammaCorrectDistanceTable,
filteredColor, info.hasUseLCDText(), useBGR);
} else {
batch = GrAtlasTextBatch::CreateBitmap(format, glyphCount, cache);
}
GrAtlasTextBatch::Geometry& geometry = batch->geometry();
geometry.fViewMatrix = viewMatrix;
geometry.fBlob = SkRef(this);
geometry.fRun = run;
geometry.fSubRun = subRun;
geometry.fColor = subRunColor;
geometry.fX = x;
geometry.fY = y;
batch->init();
return batch;
}
void GrDistanceFieldTextContext::setupCoverageEffect(const SkColor& filteredColor) {
GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
GrTextureParams gammaParams(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
uint32_t textureUniqueID = fCurrTexture->getUniqueID();
const SkMatrix& ctm = fViewMatrix;
// set up any flags
uint32_t flags = 0;
flags |= ctm.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
flags |= fUseLCDText ? kUseLCD_DistanceFieldEffectFlag : 0;
flags |= fUseLCDText && ctm.rectStaysRect() ?
kRectToRect_DistanceFieldEffectFlag : 0;
bool useBGR = SkPixelGeometryIsBGR(fDeviceProperties.pixelGeometry());
flags |= fUseLCDText && useBGR ? kBGR_DistanceFieldEffectFlag : 0;
// see if we need to create a new effect
if (textureUniqueID != fEffectTextureUniqueID ||
filteredColor != fEffectColor ||
flags != fEffectFlags ||
!fCachedGeometryProcessor->viewMatrix().cheapEqualTo(fViewMatrix)) {
GrColor color = fPaint.getColor();
if (fUseLCDText) {
GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
float redCorrection =
fDistanceAdjustTable[GrColorUnpackR(colorNoPreMul) >> kDistanceAdjustLumShift];
float greenCorrection =
fDistanceAdjustTable[GrColorUnpackG(colorNoPreMul) >> kDistanceAdjustLumShift];
float blueCorrection =
fDistanceAdjustTable[GrColorUnpackB(colorNoPreMul) >> kDistanceAdjustLumShift];
GrDistanceFieldLCDTextGeoProc::DistanceAdjust widthAdjust =
GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(redCorrection,
greenCorrection,
blueCorrection);
fCachedGeometryProcessor.reset(GrDistanceFieldLCDTextGeoProc::Create(color,
fViewMatrix,
fCurrTexture,
params,
widthAdjust,
flags));
} else {
