| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrStencilAndCoverTextContext.h" |
| #include "GrAtlasTextContext.h" |
| #include "GrContext.h" |
| #include "GrRenderTargetContext.h" |
| #include "GrPath.h" |
| #include "GrPathRange.h" |
| #include "GrPipelineBuilder.h" |
| #include "GrResourceProvider.h" |
| #include "GrTextUtils.h" |
| #include "SkAutoKern.h" |
| #include "SkDraw.h" |
| #include "SkDrawProcs.h" |
| #include "SkGlyphCache.h" |
| #include "SkGrPriv.h" |
| #include "SkDrawFilter.h" |
| #include "SkPath.h" |
| #include "SkTextBlobRunIterator.h" |
| #include "SkTextMapStateProc.h" |
| #include "SkTextFormatParams.h" |
| |
| #include "batches/GrDrawPathBatch.h" |
| |
| template<typename Key, typename Val> static void delete_hash_map_entry(const Key&, Val* val) { |
| SkASSERT(*val); |
| delete *val; |
| } |
| |
| template<typename T> static void delete_hash_table_entry(T* val) { |
| SkASSERT(*val); |
| delete *val; |
| } |
| |
| GrStencilAndCoverTextContext::GrStencilAndCoverTextContext(GrAtlasTextContext* fallbackTextContext) |
| : fFallbackTextContext(fallbackTextContext) |
| , fCacheSize(0) { |
| } |
| |
| GrStencilAndCoverTextContext* |
| GrStencilAndCoverTextContext::Create(GrAtlasTextContext* fallbackTextContext) { |
| return new GrStencilAndCoverTextContext(fallbackTextContext);; |
| } |
| |
| GrStencilAndCoverTextContext::~GrStencilAndCoverTextContext() { |
| fBlobIdCache.foreach(delete_hash_map_entry<uint32_t, TextBlob*>); |
| fBlobKeyCache.foreach(delete_hash_table_entry<TextBlob*>); |
| } |
| |
| bool GrStencilAndCoverTextContext::internalCanDraw(const SkPaint& skPaint) { |
| if (skPaint.getRasterizer()) { |
| return false; |
| } |
| if (skPaint.getMaskFilter()) { |
| return false; |
| } |
| if (SkPathEffect* pe = skPaint.getPathEffect()) { |
| if (pe->asADash(nullptr) != SkPathEffect::kDash_DashType) { |
| return false; |
| } |
| } |
| // No hairlines. They would require new paths with customized strokes for every new draw matrix. |
| return SkPaint::kStroke_Style != skPaint.getStyle() || 0 != skPaint.getStrokeWidth(); |
| } |
| |
| void GrStencilAndCoverTextContext::drawText(GrContext* context, GrRenderTargetContext* rtc, |
| const GrClip& clip, const GrPaint& paint, |
| const SkPaint& skPaint, const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| const char text[], size_t byteLength, |
| SkScalar x, SkScalar y, const SkIRect& clipBounds) { |
| if (context->abandoned()) { |
| return; |
| } else if (this->canDraw(skPaint, viewMatrix)) { |
| if (skPaint.getTextSize() > 0) { |
| TextRun run(skPaint); |
| run.setText(text, byteLength, x, y); |
| run.draw(context, rtc, paint, clip, viewMatrix, props, 0, 0, |
| clipBounds, fFallbackTextContext, skPaint); |
| } |
| return; |
| } else if (fFallbackTextContext->canDraw(skPaint, viewMatrix, props, |
| *context->caps()->shaderCaps())) { |
| fFallbackTextContext->drawText(context, rtc, clip, paint, skPaint, viewMatrix, props, text, |
| byteLength, x, y, clipBounds); |
| return; |
| } |
| |
| // fall back to drawing as a path |
| GrTextUtils::DrawTextAsPath(context, rtc, clip, skPaint, viewMatrix, text, byteLength, x, y, |
| clipBounds); |
| } |
| |
| void GrStencilAndCoverTextContext::drawPosText(GrContext* context, GrRenderTargetContext* rtc, |
| const GrClip& clip, |
| const GrPaint& paint, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| const char text[], |
| size_t byteLength, |
| const SkScalar pos[], |
| int scalarsPerPosition, |
| const SkPoint& offset, |
| const SkIRect& clipBounds) { |
| if (context->abandoned()) { |
| return; |
| } else if (this->canDraw(skPaint, viewMatrix)) { |
| if (skPaint.getTextSize() > 0) { |
| TextRun run(skPaint); |
| run.setPosText(text, byteLength, pos, scalarsPerPosition, offset); |
| run.draw(context, rtc, paint, clip, viewMatrix, props, 0, 0, |
| clipBounds, fFallbackTextContext, skPaint); |
| } |
| return; |
| } else if (fFallbackTextContext->canDraw(skPaint, viewMatrix, props, |
| *context->caps()->shaderCaps())) { |
| fFallbackTextContext->drawPosText(context, rtc, clip, paint, skPaint, viewMatrix, props, |
| text, byteLength, pos, |
| scalarsPerPosition, offset, clipBounds); |
| return; |
| } |
| |
| // fall back to drawing as a path |
| GrTextUtils::DrawPosTextAsPath(context, rtc, props, clip, skPaint, viewMatrix, text, |
| byteLength, pos, scalarsPerPosition, offset, clipBounds); |
| } |
| |
| void GrStencilAndCoverTextContext::uncachedDrawTextBlob(GrContext* context, |
| GrRenderTargetContext* rtc, |
| const GrClip& clip, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| const SkTextBlob* blob, |
| SkScalar x, SkScalar y, |
| SkDrawFilter* drawFilter, |
| const SkIRect& clipBounds) { |
| SkPaint runPaint = skPaint; |
| |
| SkTextBlobRunIterator it(blob); |
| for (;!it.done(); it.next()) { |
| size_t textLen = it.glyphCount() * sizeof(uint16_t); |
| const SkPoint& offset = it.offset(); |
| |
| // applyFontToPaint() always overwrites the exact same attributes, |
| // so it is safe to not re-seed the paint for this reason. |
| it.applyFontToPaint(&runPaint); |
| |
| if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) { |
| // A false return from filter() means we should abort the current draw. |
| runPaint = skPaint; |
| continue; |
| } |
| |
| runPaint.setFlags(GrTextUtils::FilterTextFlags(props, runPaint)); |
| |
| GrPaint grPaint; |
| if (!SkPaintToGrPaint(context, rtc, runPaint, viewMatrix, &grPaint)) { |
| return; |
| } |
| |
| switch (it.positioning()) { |
| case SkTextBlob::kDefault_Positioning: |
| this->drawText(context, rtc, clip, grPaint, runPaint, viewMatrix, props, |
| (const char *)it.glyphs(), |
| textLen, x + offset.x(), y + offset.y(), clipBounds); |
| break; |
| case SkTextBlob::kHorizontal_Positioning: |
| this->drawPosText(context, rtc, clip, grPaint, runPaint, viewMatrix, props, |
| (const char*)it.glyphs(), |
| textLen, it.pos(), 1, SkPoint::Make(x, y + offset.y()), |
| clipBounds); |
| break; |
| case SkTextBlob::kFull_Positioning: |
| this->drawPosText(context, rtc, clip, grPaint, runPaint, viewMatrix, props, |
| (const char*)it.glyphs(), |
| textLen, it.pos(), 2, SkPoint::Make(x, y), clipBounds); |
| break; |
| } |
| |
| if (drawFilter) { |
| // A draw filter may change the paint arbitrarily, so we must re-seed in this case. |
| runPaint = skPaint; |
| } |
| } |
| } |
| |
| void GrStencilAndCoverTextContext::drawTextBlob(GrContext* context, GrRenderTargetContext* rtc, |
| const GrClip& clip, const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| const SkTextBlob* skBlob, SkScalar x, SkScalar y, |
| SkDrawFilter* drawFilter, |
| const SkIRect& clipBounds) { |
| if (context->abandoned()) { |
| return; |
| } |
| |
| if (!this->internalCanDraw(skPaint)) { |
| fFallbackTextContext->drawTextBlob(context, rtc, clip, skPaint, viewMatrix, props, skBlob, |
| x, y, drawFilter, clipBounds); |
| return; |
| } |
| |
| if (drawFilter || skPaint.getPathEffect()) { |
| // This draw can't be cached. |
| this->uncachedDrawTextBlob(context, rtc, clip, skPaint, viewMatrix, props, skBlob, x, y, |
| drawFilter, clipBounds); |
| return; |
| } |
| |
| GrPaint paint; |
| if (!SkPaintToGrPaint(context, rtc, skPaint, viewMatrix, &paint)) { |
| return; |
| } |
| |
| const TextBlob& blob = this->findOrCreateTextBlob(skBlob, skPaint); |
| |
| TextBlob::Iter iter(blob); |
| for (TextRun* run = iter.get(); run; run = iter.next()) { |
| // The run's "font" overrides the anti-aliasing of the passed in paint! |
| paint.setAntiAlias(run->isAntiAlias()); |
| run->draw(context, rtc, paint, clip, viewMatrix, props, x, y, |
| clipBounds, fFallbackTextContext, skPaint); |
| run->releaseGlyphCache(); |
| } |
| } |
| |
| static inline int style_key_cnt(const GrStyle& style) { |
| int cnt = GrStyle::KeySize(style, GrStyle::Apply::kPathEffectAndStrokeRec); |
| // We should be able to make a key because we filtered out arbitrary path effects. |
| SkASSERT(cnt > 0); |
| return cnt; |
| } |
| |
| static inline void write_style_key(uint32_t* dst, const GrStyle& style) { |
| // Pass 1 for the scale since the GPU will apply the style not GrStyle::applyToPath(). |
| GrStyle::WriteKey(dst, style, GrStyle::Apply::kPathEffectAndStrokeRec, SK_Scalar1); |
| } |
| |
| const GrStencilAndCoverTextContext::TextBlob& |
| GrStencilAndCoverTextContext::findOrCreateTextBlob(const SkTextBlob* skBlob, |
| const SkPaint& skPaint) { |
| // The font-related parameters are baked into the text blob and will override this skPaint, so |
| // the only remaining properties that can affect a TextBlob are the ones related to stroke. |
| if (SkPaint::kFill_Style == skPaint.getStyle()) { // Fast path. |
| if (TextBlob** found = fBlobIdCache.find(skBlob->uniqueID())) { |
| fLRUList.remove(*found); |
| fLRUList.addToTail(*found); |
| return **found; |
| } |
| TextBlob* blob = new TextBlob(skBlob->uniqueID(), skBlob, skPaint); |
| this->purgeToFit(*blob); |
| fBlobIdCache.set(skBlob->uniqueID(), blob); |
| fLRUList.addToTail(blob); |
| fCacheSize += blob->cpuMemorySize(); |
| return *blob; |
| } else { |
| GrStyle style(skPaint); |
| SkSTArray<4, uint32_t, true> key; |
| key.reset(1 + style_key_cnt(style)); |
| key[0] = skBlob->uniqueID(); |
| write_style_key(&key[1], style); |
| if (TextBlob** found = fBlobKeyCache.find(key)) { |
| fLRUList.remove(*found); |
| fLRUList.addToTail(*found); |
| return **found; |
| } |
| TextBlob* blob = new TextBlob(key, skBlob, skPaint); |
| this->purgeToFit(*blob); |
| fBlobKeyCache.set(blob); |
| fLRUList.addToTail(blob); |
| fCacheSize += blob->cpuMemorySize(); |
| return *blob; |
| } |
| } |
| |
| void GrStencilAndCoverTextContext::purgeToFit(const TextBlob& blob) { |
| static const size_t maxCacheSize = 4 * 1024 * 1024; // Allow up to 4 MB for caching text blobs. |
| |
| size_t maxSizeForNewBlob = maxCacheSize - blob.cpuMemorySize(); |
| while (fCacheSize && fCacheSize > maxSizeForNewBlob) { |
| TextBlob* lru = fLRUList.head(); |
| if (1 == lru->key().count()) { |
| // 1-length keys are unterstood to be the blob id. |
| fBlobIdCache.remove(lru->key()[0]); |
| } else { |
| fBlobKeyCache.remove(lru->key()); |
| } |
| fLRUList.remove(lru); |
| fCacheSize -= lru->cpuMemorySize(); |
| delete lru; |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| void GrStencilAndCoverTextContext::TextBlob::init(const SkTextBlob* skBlob, |
| const SkPaint& skPaint) { |
| fCpuMemorySize = sizeof(TextBlob); |
| SkPaint runPaint(skPaint); |
| for (SkTextBlobRunIterator iter(skBlob); !iter.done(); iter.next()) { |
| iter.applyFontToPaint(&runPaint); // No need to re-seed the paint. |
| if (runPaint.getTextSize() <= 0) { |
| continue; |
| } |
| TextRun* run = this->addToTail(runPaint); |
| |
| const char* text = reinterpret_cast<const char*>(iter.glyphs()); |
| size_t byteLength = sizeof(uint16_t) * iter.glyphCount(); |
| const SkPoint& runOffset = iter.offset(); |
| |
| switch (iter.positioning()) { |
| case SkTextBlob::kDefault_Positioning: |
| run->setText(text, byteLength, runOffset.fX, runOffset.fY); |
| break; |
| case SkTextBlob::kHorizontal_Positioning: |
| run->setPosText(text, byteLength, iter.pos(), 1, SkPoint::Make(0, runOffset.fY)); |
| break; |
| case SkTextBlob::kFull_Positioning: |
| run->setPosText(text, byteLength, iter.pos(), 2, SkPoint::Make(0, 0)); |
| break; |
| } |
| |
| fCpuMemorySize += run->computeSizeInCache(); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class GrStencilAndCoverTextContext::FallbackBlobBuilder { |
| public: |
| FallbackBlobBuilder() : fBuffIdx(0), fCount(0) {} |
| |
| bool isInitialized() const { return fBuilder != nullptr; } |
| |
| void init(const SkPaint& font, SkScalar textRatio); |
| |
| void appendGlyph(uint16_t glyphId, const SkPoint& pos); |
| |
| sk_sp<SkTextBlob> makeIfNeeded(int* count); |
| |
| private: |
| enum { kWriteBufferSize = 1024 }; |
| |
| void flush(); |
| |
| std::unique_ptr<SkTextBlobBuilder> fBuilder; |
| SkPaint fFont; |
| int fBuffIdx; |
| int fCount; |
| uint16_t fGlyphIds[kWriteBufferSize]; |
| SkPoint fPositions[kWriteBufferSize]; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| GrStencilAndCoverTextContext::TextRun::TextRun(const SkPaint& fontAndStroke) |
| : fStyle(fontAndStroke) |
| , fFont(fontAndStroke) |
| , fTotalGlyphCount(0) |
| , fFallbackGlyphCount(0) |
| , fDetachedGlyphCache(nullptr) |
| , fLastDrawnGlyphsID(SK_InvalidUniqueID) { |
| SkASSERT(fFont.getTextSize() > 0); |
| SkASSERT(!fStyle.hasNonDashPathEffect()); // Arbitrary path effects not supported. |
| SkASSERT(!fStyle.isSimpleHairline()); // Hairlines are not supported. |
| |
| // Setting to "fill" ensures that no strokes get baked into font outlines. (We use the GPU path |
| // rendering API for stroking). |
| fFont.setStyle(SkPaint::kFill_Style); |
| |
| if (fFont.isFakeBoldText() && fStyle.isSimpleFill()) { |
| const SkStrokeRec& stroke = fStyle.strokeRec(); |
| // Instead of letting fake bold get baked into the glyph outlines, do it with GPU stroke. |
| SkScalar fakeBoldScale = SkScalarInterpFunc(fFont.getTextSize(), |
| kStdFakeBoldInterpKeys, |
| kStdFakeBoldInterpValues, |
| kStdFakeBoldInterpLength); |
| SkScalar extra = SkScalarMul(fFont.getTextSize(), fakeBoldScale); |
| |
| SkStrokeRec strokeRec(SkStrokeRec::kFill_InitStyle); |
| strokeRec.setStrokeStyle(stroke.needToApply() ? stroke.getWidth() + extra : extra, |
| true /*strokeAndFill*/); |
| fStyle = GrStyle(strokeRec, fStyle.pathEffect()); |
| fFont.setFakeBoldText(false); |
| } |
| |
| if (!fFont.getPathEffect() && !fStyle.isDashed()) { |
| const SkStrokeRec& stroke = fStyle.strokeRec(); |
| // We can draw the glyphs from canonically sized paths. |
| fTextRatio = fFont.getTextSize() / SkPaint::kCanonicalTextSizeForPaths; |
| fTextInverseRatio = SkPaint::kCanonicalTextSizeForPaths / fFont.getTextSize(); |
| |
| // Compensate for the glyphs being scaled by fTextRatio. |
| if (!fStyle.isSimpleFill()) { |
| SkStrokeRec strokeRec(SkStrokeRec::kFill_InitStyle); |
| strokeRec.setStrokeStyle(stroke.getWidth() / fTextRatio, |
| SkStrokeRec::kStrokeAndFill_Style == stroke.getStyle()); |
| fStyle = GrStyle(strokeRec, fStyle.pathEffect()); |
| } |
| |
| fFont.setLinearText(true); |
| fFont.setLCDRenderText(false); |
| fFont.setAutohinted(false); |
| fFont.setHinting(SkPaint::kNo_Hinting); |
| fFont.setSubpixelText(true); |
| fFont.setTextSize(SkIntToScalar(SkPaint::kCanonicalTextSizeForPaths)); |
| |
| fUsingRawGlyphPaths = SK_Scalar1 == fFont.getTextScaleX() && |
| 0 == fFont.getTextSkewX() && |
| !fFont.isFakeBoldText() && |
| !fFont.isVerticalText(); |
| } else { |
| fTextRatio = fTextInverseRatio = 1.0f; |
| fUsingRawGlyphPaths = false; |
| } |
| |
| // Generate the key that will be used to cache the GPU glyph path objects. |
| if (fUsingRawGlyphPaths && fStyle.isSimpleFill()) { |
| static const GrUniqueKey::Domain kRawFillPathGlyphDomain = GrUniqueKey::GenerateDomain(); |
| |
| const SkTypeface* typeface = fFont.getTypeface(); |
| GrUniqueKey::Builder builder(&fGlyphPathsKey, kRawFillPathGlyphDomain, 1); |
| reinterpret_cast<uint32_t&>(builder[0]) = typeface ? typeface->uniqueID() : 0; |
| } else { |
| static const GrUniqueKey::Domain kPathGlyphDomain = GrUniqueKey::GenerateDomain(); |
| |
| int styleDataCount = GrStyle::KeySize(fStyle, GrStyle::Apply::kPathEffectAndStrokeRec); |
| // Key should be valid since we opted out of drawing arbitrary path effects. |
| SkASSERT(styleDataCount >= 0); |
| if (fUsingRawGlyphPaths) { |
| const SkTypeface* typeface = fFont.getTypeface(); |
| GrUniqueKey::Builder builder(&fGlyphPathsKey, kPathGlyphDomain, 2 + styleDataCount); |
| reinterpret_cast<uint32_t&>(builder[0]) = typeface ? typeface->uniqueID() : 0; |
| reinterpret_cast<uint32_t&>(builder[1]) = styleDataCount; |
| if (styleDataCount) { |
| write_style_key(&builder[2], fStyle); |
| } |
| } else { |
| SkGlyphCache* glyphCache = this->getGlyphCache(); |
| const SkTypeface* typeface = glyphCache->getScalerContext()->getTypeface(); |
| const SkDescriptor* desc = &glyphCache->getDescriptor(); |
| int descDataCount = (desc->getLength() + 3) / 4; |
| GrUniqueKey::Builder builder(&fGlyphPathsKey, kPathGlyphDomain, |
| 2 + styleDataCount + descDataCount); |
| reinterpret_cast<uint32_t&>(builder[0]) = typeface ? typeface->uniqueID() : 0; |
| reinterpret_cast<uint32_t&>(builder[1]) = styleDataCount | (descDataCount << 16); |
| if (styleDataCount) { |
| write_style_key(&builder[2], fStyle); |
| } |
| memcpy(&builder[2 + styleDataCount], desc, desc->getLength()); |
| } |
| } |
| } |
| |
| GrStencilAndCoverTextContext::TextRun::~TextRun() { |
| this->releaseGlyphCache(); |
| } |
| |
| void GrStencilAndCoverTextContext::TextRun::setText(const char text[], size_t byteLength, |
| SkScalar x, SkScalar y) { |
| SkASSERT(byteLength == 0 || text != nullptr); |
| |
| SkGlyphCache* glyphCache = this->getGlyphCache(); |
| SkPaint::GlyphCacheProc glyphCacheProc = SkPaint::GetGlyphCacheProc(fFont.getTextEncoding(), |
| fFont.isDevKernText(), |
| true); |
| |
| fTotalGlyphCount = fFont.countText(text, byteLength); |
| fInstanceData.reset(InstanceData::Alloc(GrPathRendering::kTranslate_PathTransformType, |
| fTotalGlyphCount)); |
| |
| const char* stop = text + byteLength; |
| |
| // Measure first if needed. |
| if (fFont.getTextAlign() != SkPaint::kLeft_Align) { |
| SkScalar stopX = 0; |
| SkScalar stopY = 0; |
| |
| const char* textPtr = text; |
| while (textPtr < stop) { |
| // We don't need x, y here, since all subpixel variants will have the |
| // same advance. |
| const SkGlyph& glyph = glyphCacheProc(glyphCache, &textPtr); |
| |
| stopX += SkFloatToScalar(glyph.fAdvanceX); |
| stopY += SkFloatToScalar(glyph.fAdvanceY); |
| } |
| SkASSERT(textPtr == stop); |
| |
| SkScalar alignX = stopX * fTextRatio; |
| SkScalar alignY = stopY * fTextRatio; |
| |
| if (fFont.getTextAlign() == SkPaint::kCenter_Align) { |
| alignX = SkScalarHalf(alignX); |
| alignY = SkScalarHalf(alignY); |
| } |
| |
| x -= alignX; |
| y -= alignY; |
| } |
| |
| SkAutoKern autokern; |
| |
| FallbackBlobBuilder fallback; |
| while (text < stop) { |
| const SkGlyph& glyph = glyphCacheProc(glyphCache, &text); |
| x += autokern.adjust(glyph) * fTextRatio; |
| if (glyph.fWidth) { |
| this->appendGlyph(glyph, SkPoint::Make(x, y), &fallback); |
| } |
| |
| x += SkFloatToScalar(glyph.fAdvanceX) * fTextRatio; |
| y += SkFloatToScalar(glyph.fAdvanceY) * fTextRatio; |
| } |
| |
| fFallbackTextBlob = fallback.makeIfNeeded(&fFallbackGlyphCount); |
| } |
| |
| void GrStencilAndCoverTextContext::TextRun::setPosText(const char text[], size_t byteLength, |
| const SkScalar pos[], int scalarsPerPosition, |
| const SkPoint& offset) { |
| SkASSERT(byteLength == 0 || text != nullptr); |
| SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| |
| SkGlyphCache* glyphCache = this->getGlyphCache(); |
| SkPaint::GlyphCacheProc glyphCacheProc = SkPaint::GetGlyphCacheProc(fFont.getTextEncoding(), |
| fFont.isDevKernText(), |
| true); |
| |
| fTotalGlyphCount = fFont.countText(text, byteLength); |
| fInstanceData.reset(InstanceData::Alloc(GrPathRendering::kTranslate_PathTransformType, |
| fTotalGlyphCount)); |
| |
| const char* stop = text + byteLength; |
| |
| SkTextMapStateProc tmsProc(SkMatrix::I(), offset, scalarsPerPosition); |
| SkTextAlignProc alignProc(fFont.getTextAlign()); |
| FallbackBlobBuilder fallback; |
| while (text < stop) { |
| const SkGlyph& glyph = glyphCacheProc(glyphCache, &text); |
| if (glyph.fWidth) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| SkPoint loc; |
| alignProc(tmsLoc, glyph, &loc); |
| |
| this->appendGlyph(glyph, loc, &fallback); |
| } |
| pos += scalarsPerPosition; |
| } |
| |
| fFallbackTextBlob = fallback.makeIfNeeded(&fFallbackGlyphCount); |
| } |
| |
| GrPathRange* GrStencilAndCoverTextContext::TextRun::createGlyphs(GrContext* ctx) const { |
| GrPathRange* glyphs = static_cast<GrPathRange*>( |
| ctx->resourceProvider()->findAndRefResourceByUniqueKey(fGlyphPathsKey)); |
| if (nullptr == glyphs) { |
| if (fUsingRawGlyphPaths) { |
| SkScalerContextEffects noeffects; |
| glyphs = ctx->resourceProvider()->createGlyphs(fFont.getTypeface(), noeffects, |
| nullptr, fStyle); |
| } else { |
| SkGlyphCache* cache = this->getGlyphCache(); |
| glyphs = ctx->resourceProvider()->createGlyphs(cache->getScalerContext()->getTypeface(), |
| cache->getScalerContext()->getEffects(), |
| &cache->getDescriptor(), |
| fStyle); |
| } |
| ctx->resourceProvider()->assignUniqueKeyToResource(fGlyphPathsKey, glyphs); |
| } |
| return glyphs; |
| } |
| |
| inline void GrStencilAndCoverTextContext::TextRun::appendGlyph(const SkGlyph& glyph, |
| const SkPoint& pos, |
| FallbackBlobBuilder* fallback) { |
| // Stick the glyphs we can't draw into the fallback text blob. |
| if (SkMask::kARGB32_Format == glyph.fMaskFormat) { |
| if (!fallback->isInitialized()) { |
| fallback->init(fFont, fTextRatio); |
| } |
| fallback->appendGlyph(glyph.getGlyphID(), pos); |
| } else { |
| fInstanceData->append(glyph.getGlyphID(), fTextInverseRatio * pos.x(), |
| fTextInverseRatio * pos.y()); |
| } |
| } |
| |
| void GrStencilAndCoverTextContext::TextRun::draw(GrContext* ctx, |
| GrRenderTargetContext* renderTargetContext, |
| const GrPaint& grPaint, |
| const GrClip& clip, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| SkScalar x, SkScalar y, |
| const SkIRect& clipBounds, |
| GrAtlasTextContext* fallbackTextContext, |
| const SkPaint& originalSkPaint) const { |
| SkASSERT(fInstanceData); |
| SkASSERT(renderTargetContext->isStencilBufferMultisampled() || !grPaint.isAntiAlias()); |
| |
| if (fInstanceData->count()) { |
| static constexpr GrUserStencilSettings kCoverPass( |
| GrUserStencilSettings::StaticInit< |
| 0x0000, |
| GrUserStencilTest::kNotEqual, // Stencil pass accounts for clip. |
| 0xffff, |
| GrUserStencilOp::kZero, |
| GrUserStencilOp::kKeep, |
| 0xffff>() |
| ); |
| |
| SkAutoTUnref<GrPathRange> glyphs(this->createGlyphs(ctx)); |
| if (fLastDrawnGlyphsID != glyphs->uniqueID()) { |
| // Either this is the first draw or the glyphs object was purged since last draw. |
| glyphs->loadPathsIfNeeded(fInstanceData->indices(), fInstanceData->count()); |
| fLastDrawnGlyphsID = glyphs->uniqueID(); |
| } |
| |
| // Don't compute a bounding box. For dst copy texture, we'll opt instead for it to just copy |
| // the entire dst. Realistically this is a moot point, because any context that supports |
| // NV_path_rendering will also support NV_blend_equation_advanced. |
| // For clipping we'll just skip any optimizations based on the bounds. This does, however, |
| // hurt batching. |
| const SkRect bounds = SkRect::MakeIWH(renderTargetContext->width(), |
| renderTargetContext->height()); |
| |
| SkAutoTUnref<GrDrawBatch> batch( |
| GrDrawPathRangeBatch::Create(viewMatrix, fTextRatio, fTextInverseRatio * x, |
| fTextInverseRatio * y, grPaint.getColor(), |
| GrPathRendering::kWinding_FillType, glyphs, fInstanceData, |
| bounds)); |
| |
| GrPipelineBuilder pipelineBuilder(grPaint); |
| pipelineBuilder.setState(GrPipelineBuilder::kHWAntialias_Flag, grPaint.isAntiAlias()); |
| pipelineBuilder.setUserStencil(&kCoverPass); |
| |
| renderTargetContext->drawBatch(pipelineBuilder, clip, batch); |
| } |
| |
| if (fFallbackTextBlob) { |
| SkPaint fallbackSkPaint(originalSkPaint); |
| fStyle.strokeRec().applyToPaint(&fallbackSkPaint); |
| if (!fStyle.isSimpleFill()) { |
| fallbackSkPaint.setStrokeWidth(fStyle.strokeRec().getWidth() * fTextRatio); |
| } |
| |
| fallbackTextContext->drawTextBlob(ctx, renderTargetContext, clip, fallbackSkPaint, |
| viewMatrix, props, fFallbackTextBlob.get(), x, y, nullptr, |
| clipBounds); |
| } |
| } |
| |
| SkGlyphCache* GrStencilAndCoverTextContext::TextRun::getGlyphCache() const { |
| if (!fDetachedGlyphCache) { |
| fDetachedGlyphCache = fFont.detachCache(nullptr, SkPaint::kNone_ScalerContextFlags, |
| nullptr); |
| } |
| return fDetachedGlyphCache; |
| } |
| |
| |
| void GrStencilAndCoverTextContext::TextRun::releaseGlyphCache() const { |
| if (fDetachedGlyphCache) { |
| SkGlyphCache::AttachCache(fDetachedGlyphCache); |
| fDetachedGlyphCache = nullptr; |
| } |
| } |
| |
| size_t GrStencilAndCoverTextContext::TextRun::computeSizeInCache() const { |
| size_t size = sizeof(TextRun) + fGlyphPathsKey.size(); |
| // The instance data always reserves enough space for every glyph. |
| size += (fTotalGlyphCount + fFallbackGlyphCount) * (sizeof(uint16_t) + 2 * sizeof(float)); |
| if (fInstanceData) { |
| size += sizeof(InstanceData); |
| } |
| if (fFallbackTextBlob) { |
| size += sizeof(SkTextBlob); |
| } |
| return size; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| void GrStencilAndCoverTextContext::FallbackBlobBuilder::init(const SkPaint& font, |
| SkScalar textRatio) { |
| SkASSERT(!this->isInitialized()); |
| fBuilder.reset(new SkTextBlobBuilder); |
| fFont = font; |
| fFont.setTextAlign(SkPaint::kLeft_Align); // The glyph positions will already account for align. |
| fFont.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| // No need for subpixel positioning with bitmap glyphs. TODO: revisit if non-bitmap color glyphs |
| // show up and https://code.google.com/p/skia/issues/detail?id=4408 gets resolved. |
| fFont.setSubpixelText(false); |
| fFont.setTextSize(fFont.getTextSize() * textRatio); |
| fBuffIdx = 0; |
| } |
| |
| void GrStencilAndCoverTextContext::FallbackBlobBuilder::appendGlyph(uint16_t glyphId, |
| const SkPoint& pos) { |
| SkASSERT(this->isInitialized()); |
| if (fBuffIdx >= kWriteBufferSize) { |
| this->flush(); |
| } |
| fGlyphIds[fBuffIdx] = glyphId; |
| fPositions[fBuffIdx] = pos; |
| fBuffIdx++; |
| fCount++; |
| } |
| |
| void GrStencilAndCoverTextContext::FallbackBlobBuilder::flush() { |
| SkASSERT(this->isInitialized()); |
| SkASSERT(fBuffIdx <= kWriteBufferSize); |
| if (!fBuffIdx) { |
| return; |
| } |
| // This will automatically merge with previous runs since we use the same font. |
| const SkTextBlobBuilder::RunBuffer& buff = fBuilder->allocRunPos(fFont, fBuffIdx); |
| memcpy(buff.glyphs, fGlyphIds, fBuffIdx * sizeof(uint16_t)); |
| memcpy(buff.pos, fPositions[0].asScalars(), fBuffIdx * 2 * sizeof(SkScalar)); |
| fBuffIdx = 0; |
| } |
| |
| sk_sp<SkTextBlob> GrStencilAndCoverTextContext::FallbackBlobBuilder::makeIfNeeded(int *count) { |
| *count = fCount; |
| if (fCount) { |
| this->flush(); |
| return fBuilder->make(); |
| } |
| return nullptr; |
| } |