| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/core/SkStrike.h" |
| |
| #include "include/core/SkGraphics.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/private/SkMutex.h" |
| #include "include/private/SkOnce.h" |
| #include "include/private/SkTemplates.h" |
| #include "src/core/SkEnumerate.h" |
| #include "src/core/SkMakeUnique.h" |
| #include <cctype> |
| |
| SkStrike::SkStrike( |
| const SkDescriptor& desc, |
| std::unique_ptr<SkScalerContext> scaler, |
| const SkFontMetrics& fontMetrics) |
| : fDesc{desc} |
| , fScalerContext{std::move(scaler)} |
| , fFontMetrics{fontMetrics} |
| , fRoundingSpec{fScalerContext->isSubpixel(), |
| fScalerContext->computeAxisAlignmentForHText()} { |
| SkASSERT(fScalerContext != nullptr); |
| fMemoryUsed = sizeof(*this); |
| } |
| |
| #ifdef SK_DEBUG |
| #define VALIDATE() AutoValidate av(this) |
| #else |
| #define VALIDATE() |
| #endif |
| |
| // -- glyph creation ------------------------------------------------------------------------------- |
| SkGlyph* SkStrike::makeGlyph(SkPackedGlyphID packedGlyphID) { |
| fMemoryUsed += sizeof(SkGlyph); |
| SkGlyph* glyph = fAlloc.make<SkGlyph>(packedGlyphID); |
| fGlyphMap.set(glyph); |
| return glyph; |
| } |
| |
| SkGlyph* SkStrike::glyph(SkPackedGlyphID packedGlyphID) { |
| VALIDATE(); |
| SkGlyph* glyph = fGlyphMap.findOrNull(packedGlyphID); |
| if (glyph == nullptr) { |
| glyph = this->makeGlyph(packedGlyphID); |
| fScalerContext->getMetrics(glyph); |
| } |
| return glyph; |
| } |
| |
| SkGlyph* SkStrike::glyphFromPrototype(const SkGlyphPrototype& p, void* image) { |
| SkGlyph* glyph = fGlyphMap.findOrNull(p.id); |
| if (glyph == nullptr) { |
| fMemoryUsed += sizeof(SkGlyph); |
| glyph = fAlloc.make<SkGlyph>(p); |
| fGlyphMap.set(glyph); |
| } |
| if (glyph->setImage(&fAlloc, image)) { |
| fMemoryUsed += glyph->imageSize(); |
| } |
| return glyph; |
| } |
| |
| SkGlyph* SkStrike::glyphOrNull(SkPackedGlyphID id) const { |
| return fGlyphMap.findOrNull(id); |
| } |
| |
| const SkPath* SkStrike::preparePath(SkGlyph* glyph) { |
| if (glyph->setPath(&fAlloc, fScalerContext.get())) { |
| fMemoryUsed += glyph->path()->approximateBytesUsed(); |
| } |
| return glyph->path(); |
| } |
| |
| const SkPath* SkStrike::preparePath(SkGlyph* glyph, const SkPath* path) { |
| if (glyph->setPath(&fAlloc, path)) { |
| fMemoryUsed += glyph->path()->approximateBytesUsed(); |
| } |
| return glyph->path(); |
| } |
| |
| const SkDescriptor& SkStrike::getDescriptor() const { |
| return *fDesc.getDesc(); |
| } |
| |
| int SkStrike::countCachedGlyphs() const { |
| return fGlyphMap.count(); |
| } |
| |
| SkSpan<const SkGlyph*> SkStrike::internalPrepare( |
| SkSpan<const SkGlyphID> glyphIDs, PathDetail pathDetail, const SkGlyph** results) { |
| const SkGlyph** cursor = results; |
| for (auto glyphID : glyphIDs) { |
| SkGlyph* glyphPtr = this->glyph(SkPackedGlyphID{glyphID}); |
| if (pathDetail == kMetricsAndPath) { |
| this->preparePath(glyphPtr); |
| } |
| *cursor++ = glyphPtr; |
| } |
| |
| return {results, glyphIDs.size()}; |
| } |
| |
| const void* SkStrike::prepareImage(SkGlyph* glyph) { |
| if (glyph->setImage(&fAlloc, fScalerContext.get())) { |
| fMemoryUsed += glyph->imageSize(); |
| } |
| return glyph->image(); |
| } |
| |
| SkGlyph* SkStrike::mergeGlyphAndImage(SkPackedGlyphID toID, const SkGlyph& from) { |
| SkGlyph* glyph = fGlyphMap.findOrNull(toID); |
| if (glyph == nullptr) { |
| glyph = this->makeGlyph(toID); |
| } |
| if (glyph->setMetricsAndImage(&fAlloc, from)) { |
| fMemoryUsed += glyph->imageSize(); |
| } |
| return glyph; |
| } |
| |
| const SkGlyph* SkStrike::getCachedGlyphAnySubPix(SkGlyphID glyphID, SkPackedGlyphID vetoID) const { |
| for (SkFixed subY = 0; subY < SK_Fixed1; subY += SK_FixedQuarter) { |
| for (SkFixed subX = 0; subX < SK_Fixed1; subX += SK_FixedQuarter) { |
| SkPackedGlyphID packedGlyphID{glyphID, subX, subY}; |
| if (packedGlyphID == vetoID) continue; |
| if (SkGlyph* glyphPtr = fGlyphMap.findOrNull(packedGlyphID)) { |
| return glyphPtr; |
| } |
| } |
| } |
| |
| return nullptr; |
| } |
| |
| SkSpan<const SkGlyph*> SkStrike::metrics(SkSpan<const SkGlyphID> glyphIDs, |
| const SkGlyph* results[]) { |
| return this->internalPrepare(glyphIDs, kMetricsOnly, results); |
| } |
| |
| SkSpan<const SkGlyph*> SkStrike::preparePaths(SkSpan<const SkGlyphID> glyphIDs, |
| const SkGlyph* results[]) { |
| return this->internalPrepare(glyphIDs, kMetricsAndPath, results); |
| } |
| |
| SkSpan<const SkGlyph*> |
| SkStrike::prepareImages(SkSpan<const SkPackedGlyphID> glyphIDs, const SkGlyph* results[]) { |
| const SkGlyph** cursor = results; |
| for (auto glyphID : glyphIDs) { |
| SkGlyph* glyphPtr = this->glyph(glyphID); |
| (void)this->prepareImage(glyphPtr); |
| *cursor++ = glyphPtr; |
| } |
| |
| return {results, glyphIDs.size()}; |
| } |
| |
| template <typename Fn> |
| void SkStrike::commonFilterLoop(SkDrawableGlyphBuffer* drawables, Fn&& fn) { |
| drawables->forEachGlyphID( |
| [&](size_t i, SkPackedGlyphID packedID, SkPoint pos) { |
| if (SkScalarsAreFinite(pos.x(), pos.y())) { |
| SkGlyph* glyph = this->glyph(packedID); |
| if (!glyph->isEmpty()) { |
| fn(i, glyph, pos); |
| } |
| } |
| }); |
| } |
| |
| void SkStrike::prepareForDrawingMasksCPU(SkDrawableGlyphBuffer* drawables) { |
| this->commonFilterLoop(drawables, |
| [&](size_t i, SkGlyph* glyph, SkPoint pos){ |
| // If the glyph is too large, then no image is created. |
| if (this->prepareImage(glyph) != nullptr) { |
| drawables->push_back(glyph, i); |
| } |
| }); |
| } |
| |
| void SkStrike::prepareForDrawingPathsCPU(SkDrawableGlyphBuffer* drawables) { |
| this->commonFilterLoop(drawables, |
| [&](size_t i, SkGlyph* glyph, SkPoint pos){ |
| const SkPath* path = this->preparePath(glyph); |
| // The glyph my not have a path. |
| if (path != nullptr) { |
| drawables->push_back(path, i); |
| } |
| }); |
| } |
| |
| // Note: this does not actually fill out the image. That happens at atlas building time. |
| void SkStrike::prepareForMaskDrawing( |
| SkDrawableGlyphBuffer* drawables, SkSourceGlyphBuffer* rejects) { |
| this->commonFilterLoop(drawables, |
| [&](size_t i, SkGlyph* glyph, SkPoint pos) { |
| if (CanDrawAsMask(*glyph)) { |
| drawables->push_back(glyph, i); |
| } else { |
| rejects->reject(i); |
| } |
| }); |
| } |
| |
| void SkStrike::prepareForSDFTDrawing( |
| SkDrawableGlyphBuffer* drawables, SkSourceGlyphBuffer* rejects) { |
| this->commonFilterLoop(drawables, |
| [&](size_t i, SkGlyph* glyph, SkPoint pos) { |
| if (CanDrawAsSDFT(*glyph)) { |
| drawables->push_back(glyph, i); |
| } else { |
| rejects->reject(i); |
| } |
| }); |
| } |
| |
| void SkStrike::prepareForPathDrawing( |
| SkDrawableGlyphBuffer* drawables, SkSourceGlyphBuffer* rejects) { |
| this->commonFilterLoop(drawables, |
| [&](size_t i, SkGlyph* glyph, SkPoint pos) { |
| if (!glyph->isColor()) { |
| const SkPath* path = this->preparePath(glyph); |
| if (path != nullptr) { |
| // Save off the path to draw later. |
| drawables->push_back(path, i); |
| } else { |
| // Glyph does not have a path. It is probably bitmap only. |
| rejects->reject(i, glyph->maxDimension()); |
| } |
| } else { |
| // Glyph is color. |
| rejects->reject(i, glyph->maxDimension()); |
| } |
| }); |
| } |
| |
| void SkStrike::findIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos, |
| SkGlyph* glyph, SkScalar* array, int* count) { |
| glyph->ensureIntercepts(bounds, scale, xPos, array, count, &fAlloc); |
| } |
| |
| void SkStrike::dump() const { |
| const SkTypeface* face = fScalerContext->getTypeface(); |
| const SkScalerContextRec& rec = fScalerContext->getRec(); |
| SkMatrix matrix; |
| rec.getSingleMatrix(&matrix); |
| matrix.preScale(SkScalarInvert(rec.fTextSize), SkScalarInvert(rec.fTextSize)); |
| SkString name; |
| face->getFamilyName(&name); |
| |
| SkString msg; |
| SkFontStyle style = face->fontStyle(); |
| msg.printf("cache typeface:%x %25s:(%d,%d,%d)\n %s glyphs:%3d", |
| face->uniqueID(), name.c_str(), style.weight(), style.width(), style.slant(), |
| rec.dump().c_str(), fGlyphMap.count()); |
| SkDebugf("%s\n", msg.c_str()); |
| } |
| |
| void SkStrike::onAboutToExitScope() { } |
| |
| #ifdef SK_DEBUG |
| void SkStrike::forceValidate() const { |
| size_t memoryUsed = sizeof(*this); |
| fGlyphMap.foreach ([&memoryUsed](const SkGlyph* glyphPtr) { |
| memoryUsed += sizeof(SkGlyph); |
| if (glyphPtr->setImageHasBeenCalled()) { |
| memoryUsed += glyphPtr->imageSize(); |
| } |
| if (glyphPtr->setPathHasBeenCalled() && glyphPtr->path() != nullptr) { |
| memoryUsed += glyphPtr->path()->approximateBytesUsed(); |
| } |
| }); |
| SkASSERT(fMemoryUsed == memoryUsed); |
| } |
| |
| void SkStrike::validate() const { |
| #ifdef SK_DEBUG_GLYPH_CACHE |
| forceValidate(); |
| #endif |
| } |
| #endif // SK_DEBUG |
| |
| |