| /* | |
| * Copyright 2013 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "GrDistanceFieldTextContext.h" | |
| #include "GrAtlas.h" | |
| #include "SkColorFilter.h" | |
| #include "GrDrawTarget.h" | |
| #include "GrDrawTargetCaps.h" | |
| #include "GrFontScaler.h" | |
| #include "SkGlyphCache.h" | |
| #include "GrGpu.h" | |
| #include "GrIndexBuffer.h" | |
| #include "GrStrokeInfo.h" | |
| #include "GrTextStrike.h" | |
| #include "GrTextStrike_impl.h" | |
| #include "SkDistanceFieldGen.h" | |
| #include "SkDraw.h" | |
| #include "SkGpuDevice.h" | |
| #include "SkPath.h" | |
| #include "SkRTConf.h" | |
| #include "SkStrokeRec.h" | |
| #include "effects/GrDistanceFieldTextureEffect.h" | |
| SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false, | |
| "Dump the contents of the font cache before every purge."); | |
| static const int kGlyphCoordsNoColorAttributeIndex = 1; | |
| static const int kGlyphCoordsWithColorAttributeIndex = 2; | |
| static const int kSmallDFFontSize = 32; | |
| static const int kSmallDFFontLimit = 32; | |
| static const int kMediumDFFontSize = 64; | |
| static const int kMediumDFFontLimit = 64; | |
| static const int kLargeDFFontSize = 128; | |
| namespace { | |
| // position + texture coord | |
| extern const GrVertexAttrib gTextVertexAttribs[] = { | |
| {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, | |
| {kVec2f_GrVertexAttribType, sizeof(SkPoint) , kEffect_GrVertexAttribBinding} | |
| }; | |
| // position + color + texture coord | |
| extern const GrVertexAttrib gTextVertexWithColorAttribs[] = { | |
| {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, | |
| {kVec4ub_GrVertexAttribType, sizeof(SkPoint), kColor_GrVertexAttribBinding}, | |
| {kVec2f_GrVertexAttribType, sizeof(SkPoint) + sizeof(GrColor), kEffect_GrVertexAttribBinding} | |
| }; | |
| }; | |
| GrDistanceFieldTextContext::GrDistanceFieldTextContext(GrContext* context, | |
| const SkDeviceProperties& properties, | |
| bool enable) | |
| : GrTextContext(context, properties) { | |
| #if SK_FORCE_DISTANCEFIELD_FONTS | |
| fEnableDFRendering = true; | |
| #else | |
| fEnableDFRendering = enable; | |
| #endif | |
| fStrike = NULL; | |
| fGammaTexture = NULL; | |
| fCurrVertex = 0; | |
| fVertices = NULL; | |
| } | |
| GrDistanceFieldTextContext::~GrDistanceFieldTextContext() { | |
| this->flushGlyphs(); | |
| SkSafeSetNull(fGammaTexture); | |
| } | |
| bool GrDistanceFieldTextContext::canDraw(const SkPaint& paint) { | |
| if (!fEnableDFRendering && !paint.isDistanceFieldTextTEMP()) { | |
| return false; | |
| } | |
| // rasterizers and mask filters modify alpha, which doesn't | |
| // translate well to distance | |
| if (paint.getRasterizer() || paint.getMaskFilter() || | |
| !fContext->getTextTarget()->caps()->shaderDerivativeSupport()) { | |
| return false; | |
| } | |
| // TODO: add some stroking support | |
| if (paint.getStyle() != SkPaint::kFill_Style) { | |
| return false; | |
| } | |
| // TODO: choose an appropriate maximum scale for distance fields and | |
| // enable perspective | |
| if (SkDraw::ShouldDrawTextAsPaths(paint, fContext->getMatrix())) { | |
| return false; | |
| } | |
| // distance fields cannot represent color fonts | |
| SkScalerContext::Rec rec; | |
| SkScalerContext::MakeRec(paint, &fDeviceProperties, NULL, &rec); | |
| return rec.getFormat() != SkMask::kARGB32_Format; | |
| } | |
| static inline GrColor skcolor_to_grcolor_nopremultiply(SkColor c) { | |
| unsigned r = SkColorGetR(c); | |
| unsigned g = SkColorGetG(c); | |
| unsigned b = SkColorGetB(c); | |
| return GrColorPackRGBA(r, g, b, 0xff); | |
| } | |
| void GrDistanceFieldTextContext::flushGlyphs() { | |
| if (NULL == fDrawTarget) { | |
| return; | |
| } | |
| GrDrawState* drawState = fDrawTarget->drawState(); | |
| GrDrawState::AutoRestoreEffects are(drawState); | |
| drawState->setFromPaint(fPaint, fContext->getMatrix(), fContext->getRenderTarget()); | |
| if (fCurrVertex > 0) { | |
| // setup our sampler state for our text texture/atlas | |
| SkASSERT(SkIsAlign4(fCurrVertex)); | |
| GrTexture* currTexture = fStrike->getTexture(); | |
| SkASSERT(currTexture); | |
| GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode); | |
| GrTextureParams gammaParams(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode); | |
| // Effects could be stored with one of the cache objects (atlas?) | |
| int coordsIdx = drawState->hasColorVertexAttribute() ? kGlyphCoordsWithColorAttributeIndex : | |
| kGlyphCoordsNoColorAttributeIndex; | |
| SkColor filteredColor; | |
| SkColorFilter* colorFilter = fSkPaint.getColorFilter(); | |
| if (NULL != colorFilter) { | |
| filteredColor = colorFilter->filterColor(fSkPaint.getColor()); | |
| } else { | |
| filteredColor = fSkPaint.getColor(); | |
| } | |
| if (fUseLCDText) { | |
| GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor); | |
| bool useBGR = SkDeviceProperties::Geometry::kBGR_Layout == | |
| fDeviceProperties.fGeometry.getLayout(); | |
| drawState->addCoverageEffect(GrDistanceFieldLCDTextureEffect::Create( | |
| currTexture, | |
| params, | |
| fGammaTexture, | |
| gammaParams, | |
| colorNoPreMul, | |
| fContext->getMatrix().rectStaysRect() && | |
| fContext->getMatrix().isSimilarity(), | |
| useBGR), | |
| coordsIdx)->unref(); | |
| if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() || | |
| kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() || | |
| fPaint.numColorStages()) { | |
| GrPrintf("LCD Text will not draw correctly.\n"); | |
| } | |
| SkASSERT(!drawState->hasColorVertexAttribute()); | |
| // We don't use the GrPaint's color in this case because it's been premultiplied by | |
| // alpha. Instead we feed in a non-premultiplied color, and multiply its alpha by | |
| // the mask texture color. The end result is that we get | |
| // mask*paintAlpha*paintColor + (1-mask*paintAlpha)*dstColor | |
| int a = SkColorGetA(fSkPaint.getColor()); | |
| // paintAlpha | |
| drawState->setColor(SkColorSetARGB(a, a, a, a)); | |
| // paintColor | |
| drawState->setBlendConstant(colorNoPreMul); | |
| drawState->setBlendFunc(kConstC_GrBlendCoeff, kISC_GrBlendCoeff); | |
| } else { | |
| #ifdef SK_GAMMA_APPLY_TO_A8 | |
| U8CPU lum = SkColorSpaceLuminance::computeLuminance(fDeviceProperties.fGamma, | |
| filteredColor); | |
| drawState->addCoverageEffect(GrDistanceFieldTextureEffect::Create( | |
| currTexture, params, | |
| fGammaTexture, gammaParams, | |
| lum/255.f, | |
| fContext->getMatrix().isSimilarity()), | |
| coordsIdx)->unref(); | |
| #else | |
| drawState->addCoverageEffect(GrDistanceFieldTextureEffect::Create( | |
| currTexture, params, | |
| fContext->getMatrix().isSimilarity()), | |
| coordsIdx)->unref(); | |
| #endif | |
| // set back to normal in case we took LCD path previously. | |
| drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff()); | |
| //drawState->setColor(fPaint.getColor()); | |
| // We're using per-vertex color. | |
| SkASSERT(drawState->hasColorVertexAttribute()); | |
| drawState->setColor(0xFFFFFFFF); | |
| } | |
| int nGlyphs = fCurrVertex / 4; | |
| fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer()); | |
| fDrawTarget->drawIndexedInstances(kTriangles_GrPrimitiveType, | |
| nGlyphs, | |
| 4, 6); | |
| fCurrVertex = 0; | |
| } | |
| fDrawTarget->resetVertexSource(); | |
| fVertices = NULL; | |
| } | |
| void GrDistanceFieldTextContext::drawPackedGlyph(GrGlyph::PackedID packed, | |
| SkFixed vx, SkFixed vy, | |
| GrFontScaler* scaler) { | |
| GrGlyph* glyph = fStrike->getGlyph(packed, scaler); | |
| if (NULL == glyph || glyph->fBounds.isEmpty()) { | |
| return; | |
| } | |
| SkScalar sx = SkFixedToScalar(vx); | |
| SkScalar sy = SkFixedToScalar(vy); | |
| /* | |
| // not valid, need to find a different solution for this | |
| vx += SkIntToFixed(glyph->fBounds.fLeft); | |
| vy += SkIntToFixed(glyph->fBounds.fTop); | |
| // keep them as ints until we've done the clip-test | |
| GrFixed width = glyph->fBounds.width(); | |
| GrFixed height = glyph->fBounds.height(); | |
| // check if we clipped out | |
| if (true || NULL == glyph->fPlot) { | |
| int x = vx >> 16; | |
| int y = vy >> 16; | |
| if (fClipRect.quickReject(x, y, x + width, y + height)) { | |
| // SkCLZ(3); // so we can set a break-point in the debugger | |
| return; | |
| } | |
| } | |
| */ | |
| if (NULL == glyph->fPlot) { | |
| if (fStrike->addGlyphToAtlas(glyph, scaler)) { | |
| goto HAS_ATLAS; | |
| } | |
| // try to clear out an unused plot before we flush | |
| if (fContext->getFontCache()->freeUnusedPlot(fStrike) && | |
| fStrike->addGlyphToAtlas(glyph, scaler)) { | |
| goto HAS_ATLAS; | |
| } | |
| if (c_DumpFontCache) { | |
| #ifdef SK_DEVELOPER | |
| fContext->getFontCache()->dump(); | |
| #endif | |
| } | |
| // before we purge the cache, we must flush any accumulated draws | |
| this->flushGlyphs(); | |
| fContext->flush(); | |
| // we should have an unused plot now | |
| if (fContext->getFontCache()->freeUnusedPlot(fStrike) && | |
| fStrike->addGlyphToAtlas(glyph, scaler)) { | |
| goto HAS_ATLAS; | |
| } | |
| if (NULL == glyph->fPath) { | |
| SkPath* path = SkNEW(SkPath); | |
| if (!scaler->getGlyphPath(glyph->glyphID(), path)) { | |
| // flag the glyph as being dead? | |
| delete path; | |
| return; | |
| } | |
| glyph->fPath = path; | |
| } | |
| GrContext::AutoMatrix am; | |
| SkMatrix ctm; | |
| ctm.setScale(fTextRatio, fTextRatio); | |
| ctm.postTranslate(sx, sy); | |
| GrPaint tmpPaint(fPaint); | |
| am.setPreConcat(fContext, ctm, &tmpPaint); | |
| GrStrokeInfo strokeInfo(SkStrokeRec::kFill_InitStyle); | |
| fContext->drawPath(tmpPaint, *glyph->fPath, strokeInfo); | |
| return; | |
| } | |
| HAS_ATLAS: | |
| SkASSERT(glyph->fPlot); | |
| GrDrawTarget::DrawToken drawToken = fDrawTarget->getCurrentDrawToken(); | |
| glyph->fPlot->setDrawToken(drawToken); | |
| GrTexture* texture = glyph->fPlot->texture(); | |
| SkASSERT(texture); | |
| SkScalar dx = SkIntToScalar(glyph->fBounds.fLeft + SK_DistanceFieldInset); | |
| SkScalar dy = SkIntToScalar(glyph->fBounds.fTop + SK_DistanceFieldInset); | |
| SkScalar width = SkIntToScalar(glyph->fBounds.width() - 2*SK_DistanceFieldInset); | |
| SkScalar height = SkIntToScalar(glyph->fBounds.height() - 2*SK_DistanceFieldInset); | |
| SkScalar scale = fTextRatio; | |
| dx *= scale; | |
| dy *= scale; | |
| sx += dx; | |
| sy += dy; | |
| width *= scale; | |
| height *= scale; | |
| SkFixed tx = SkIntToFixed(glyph->fAtlasLocation.fX + SK_DistanceFieldInset); | |
| SkFixed ty = SkIntToFixed(glyph->fAtlasLocation.fY + SK_DistanceFieldInset); | |
| SkFixed tw = SkIntToFixed(glyph->fBounds.width() - 2*SK_DistanceFieldInset); | |
| SkFixed th = SkIntToFixed(glyph->fBounds.height() - 2*SK_DistanceFieldInset); | |
| size_t vertSize = fUseLCDText ? (2 * sizeof(SkPoint)) | |
| : (2 * sizeof(SkPoint) + sizeof(GrColor)); | |
| SkASSERT(vertSize == fDrawTarget->getDrawState().getVertexSize()); | |
| SkPoint* positions = reinterpret_cast<SkPoint*>( | |
| reinterpret_cast<intptr_t>(fVertices) + vertSize * fCurrVertex); | |
| positions->setRectFan(sx, sy, sx + width, sy + height, vertSize); | |
| // The texture coords are last in both the with and without color vertex layouts. | |
| SkPoint* textureCoords = reinterpret_cast<SkPoint*>( | |
| reinterpret_cast<intptr_t>(positions) + vertSize - sizeof(SkPoint)); | |
| textureCoords->setRectFan(SkFixedToFloat(texture->normalizeFixedX(tx)), | |
| SkFixedToFloat(texture->normalizeFixedY(ty)), | |
| SkFixedToFloat(texture->normalizeFixedX(tx + tw)), | |
| SkFixedToFloat(texture->normalizeFixedY(ty + th)), | |
| vertSize); | |
| if (!fUseLCDText) { | |
| // color comes after position. | |
| GrColor* colors = reinterpret_cast<GrColor*>(positions + 1); | |
| for (int i = 0; i < 4; ++i) { | |
| *colors = fPaint.getColor(); | |
| colors = reinterpret_cast<GrColor*>(reinterpret_cast<intptr_t>(colors) + vertSize); | |
| } | |
| } | |
| fCurrVertex += 4; | |
| } | |
| inline void GrDistanceFieldTextContext::init(const GrPaint& paint, const SkPaint& skPaint) { | |
| GrTextContext::init(paint, skPaint); | |
| fStrike = NULL; | |
| fCurrVertex = 0; | |
| fVertices = NULL; | |
| if (fSkPaint.getTextSize() <= kSmallDFFontLimit) { | |
| fTextRatio = fSkPaint.getTextSize()/kSmallDFFontSize; | |
| fSkPaint.setTextSize(SkIntToScalar(kSmallDFFontSize)); | |
| } else if (fSkPaint.getTextSize() <= kMediumDFFontLimit) { | |
| fTextRatio = fSkPaint.getTextSize()/kMediumDFFontSize; | |
| fSkPaint.setTextSize(SkIntToScalar(kMediumDFFontSize)); | |
| } else { | |
| fTextRatio = fSkPaint.getTextSize()/kLargeDFFontSize; | |
| fSkPaint.setTextSize(SkIntToScalar(kLargeDFFontSize)); | |
| } | |
| fUseLCDText = fSkPaint.isLCDRenderText(); | |
| fSkPaint.setLCDRenderText(false); | |
| fSkPaint.setAutohinted(false); | |
| fSkPaint.setHinting(SkPaint::kNormal_Hinting); | |
| fSkPaint.setSubpixelText(true); | |
| } | |
| inline void GrDistanceFieldTextContext::finish() { | |
| this->flushGlyphs(); | |
| GrTextContext::finish(); | |
| } | |
| static void setup_gamma_texture(GrContext* context, const SkGlyphCache* cache, | |
| const SkDeviceProperties& deviceProperties, | |
| GrTexture** gammaTexture) { | |
| if (NULL == *gammaTexture) { | |
| int width, height; | |
| size_t size; | |
| #ifdef SK_GAMMA_CONTRAST | |
| SkScalar contrast = SK_GAMMA_CONTRAST; | |
| #else | |
| SkScalar contrast = 0.5f; | |
| #endif | |
| SkScalar paintGamma = deviceProperties.fGamma; | |
| SkScalar deviceGamma = deviceProperties.fGamma; | |
| size = SkScalerContext::GetGammaLUTSize(contrast, paintGamma, deviceGamma, | |
| &width, &height); | |
| SkAutoTArray<uint8_t> data((int)size); | |
| SkScalerContext::GetGammaLUTData(contrast, paintGamma, deviceGamma, data.get()); | |
| // TODO: Update this to use the cache rather than directly creating a texture. | |
| GrTextureDesc desc; | |
| desc.fFlags = kDynamicUpdate_GrTextureFlagBit; | |
| desc.fWidth = width; | |
| desc.fHeight = height; | |
| desc.fConfig = kAlpha_8_GrPixelConfig; | |
| *gammaTexture = context->getGpu()->createTexture(desc, NULL, 0); | |
| if (NULL == *gammaTexture) { | |
| return; | |
| } | |
| context->writeTexturePixels(*gammaTexture, | |
| 0, 0, width, height, | |
| (*gammaTexture)->config(), data.get(), 0, | |
| GrContext::kDontFlush_PixelOpsFlag); | |
| } | |
| } | |
| void GrDistanceFieldTextContext::drawText(const GrPaint& paint, const SkPaint& skPaint, | |
| const char text[], size_t byteLength, | |
| SkScalar x, SkScalar y) { | |
| SkASSERT(byteLength == 0 || text != NULL); | |
| // nothing to draw or can't draw | |
| if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/ | |
| || fSkPaint.getRasterizer()) { | |
| return; | |
| } | |
| this->init(paint, skPaint); | |
| if (NULL == fDrawTarget) { | |
| return; | |
| } | |
| SkScalar sizeRatio = fTextRatio; | |
| SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc(); | |
| SkAutoGlyphCacheNoGamma autoCache(fSkPaint, &fDeviceProperties, NULL); | |
| SkGlyphCache* cache = autoCache.getCache(); | |
| GrFontScaler* fontScaler = GetGrFontScaler(cache); | |
| if (NULL == fStrike) { | |
| fStrike = fContext->getFontCache()->getStrike(fontScaler, true); | |
| } | |
| setup_gamma_texture(fContext, cache, fDeviceProperties, &fGammaTexture); | |
| // allocate vertices | |
| SkASSERT(NULL == fVertices); | |
| if (!fUseLCDText) { | |
| fDrawTarget->drawState()->setVertexAttribs<gTextVertexWithColorAttribs>( | |
| SK_ARRAY_COUNT(gTextVertexWithColorAttribs)); | |
| } else { | |
| fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>( | |
| SK_ARRAY_COUNT(gTextVertexAttribs)); | |
| } | |
| int numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL); | |
| bool success = fDrawTarget->reserveVertexAndIndexSpace(4*numGlyphs, | |
| 0, | |
| &fVertices, | |
| NULL); | |
| GrAlwaysAssert(success); | |
| // need to measure first | |
| // TODO - generate positions and pre-load cache as well? | |
| const char* stop = text + byteLength; | |
| if (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) { | |
| SkFixed stopX = 0; | |
| SkFixed stopY = 0; | |
| const char* textPtr = text; | |
| while (textPtr < stop) { | |
| // don't need x, y here, since all subpixel variants will have the | |
| // same advance | |
| const SkGlyph& glyph = glyphCacheProc(cache, &textPtr, 0, 0); | |
| stopX += glyph.fAdvanceX; | |
| stopY += glyph.fAdvanceY; | |
| } | |
| SkASSERT(textPtr == stop); | |
| SkScalar alignX = SkFixedToScalar(stopX)*sizeRatio; | |
| SkScalar alignY = SkFixedToScalar(stopY)*sizeRatio; | |
| if (fSkPaint.getTextAlign() == SkPaint::kCenter_Align) { | |
| alignX = SkScalarHalf(alignX); | |
| alignY = SkScalarHalf(alignY); | |
| } | |
| x -= alignX; | |
| y -= alignY; | |
| } | |
| SkFixed fx = SkScalarToFixed(x); | |
| SkFixed fy = SkScalarToFixed(y); | |
| SkFixed fixedScale = SkScalarToFixed(sizeRatio); | |
| while (text < stop) { | |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); | |
| if (glyph.fWidth) { | |
| this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), | |
| glyph.getSubXFixed(), | |
| glyph.getSubYFixed()), | |
| fx, | |
| fy, | |
| fontScaler); | |
| } | |
| fx += SkFixedMul_portable(glyph.fAdvanceX, fixedScale); | |
| fy += SkFixedMul_portable(glyph.fAdvanceY, fixedScale); | |
| } | |
| this->finish(); | |
| } | |
| void GrDistanceFieldTextContext::drawPosText(const GrPaint& paint, const SkPaint& skPaint, | |
| const char text[], size_t byteLength, | |
| const SkScalar pos[], SkScalar constY, | |
| int scalarsPerPosition) { | |
| SkASSERT(byteLength == 0 || text != NULL); | |
| SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); | |
| // nothing to draw | |
| if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/) { | |
| return; | |
| } | |
| this->init(paint, skPaint); | |
| if (NULL == fDrawTarget) { | |
| return; | |
| } | |
| SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc(); | |
| SkAutoGlyphCacheNoGamma autoCache(fSkPaint, &fDeviceProperties, NULL); | |
| SkGlyphCache* cache = autoCache.getCache(); | |
| GrFontScaler* fontScaler = GetGrFontScaler(cache); | |
| if (NULL == fStrike) { | |
| fStrike = fContext->getFontCache()->getStrike(fontScaler, true); | |
| } | |
| // allocate vertices | |
| SkASSERT(NULL == fVertices); | |
| if (!fUseLCDText) { | |
| fDrawTarget->drawState()->setVertexAttribs<gTextVertexWithColorAttribs>( | |
| SK_ARRAY_COUNT(gTextVertexWithColorAttribs)); | |
| } else { | |
| fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>( | |
| SK_ARRAY_COUNT(gTextVertexAttribs)); | |
| } | |
| int numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL); | |
| bool success = fDrawTarget->reserveVertexAndIndexSpace(4*numGlyphs, | |
| 0, | |
| &fVertices, | |
| NULL); | |
| GrAlwaysAssert(success); | |
| setup_gamma_texture(fContext, cache, fDeviceProperties, &fGammaTexture); | |
| const char* stop = text + byteLength; | |
| if (SkPaint::kLeft_Align == fSkPaint.getTextAlign()) { | |
| while (text < stop) { | |
| // the last 2 parameters are ignored | |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); | |
| if (glyph.fWidth) { | |
| SkScalar x = pos[0]; | |
| SkScalar y = scalarsPerPosition == 1 ? constY : pos[1]; | |
| this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), | |
| glyph.getSubXFixed(), | |
| glyph.getSubYFixed()), | |
| SkScalarToFixed(x), | |
| SkScalarToFixed(y), | |
| fontScaler); | |
| } | |
| pos += scalarsPerPosition; | |
| } | |
| } else { | |
| int alignShift = SkPaint::kCenter_Align == fSkPaint.getTextAlign() ? 1 : 0; | |
| while (text < stop) { | |
| // the last 2 parameters are ignored | |
| const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); | |
| if (glyph.fWidth) { | |
| SkScalar x = pos[0]; | |
| SkScalar y = scalarsPerPosition == 1 ? constY : pos[1]; | |
| this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), | |
| glyph.getSubXFixed(), | |
| glyph.getSubYFixed()), | |
| SkScalarToFixed(x) - (glyph.fAdvanceX >> alignShift), | |
| SkScalarToFixed(y) - (glyph.fAdvanceY >> alignShift), | |
| fontScaler); | |
| } | |
| pos += scalarsPerPosition; | |
| } | |
| } | |
| this->finish(); | |
| } |