| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrAtlasTextBlob.h" |
| |
| #include "GrOpFlushState.h" |
| #include "GrTextUtils.h" |
| |
| #include "SkDistanceFieldGen.h" |
| #include "SkGlyphCache.h" |
| |
| #include "ops/GrAtlasTextOp.h" |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| // A large template to handle regenerating the vertices of a textblob with as few branches as |
| // possible |
| template <bool regenPos, bool regenCol, bool regenTexCoords> |
| inline void regen_vertices(intptr_t vertex, const GrGlyph* glyph, size_t vertexStride, |
| bool useDistanceFields, SkScalar transX, SkScalar transY, |
| int32_t log2Width, int32_t log2Height, |
| GrColor color) { |
| int u0, v0, u1, v1; |
| if (regenTexCoords) { |
| SkASSERT(glyph); |
| int width = glyph->fBounds.width(); |
| int height = glyph->fBounds.height(); |
| |
| if (useDistanceFields) { |
| u0 = glyph->fAtlasLocation.fX + SK_DistanceFieldInset; |
| v0 = glyph->fAtlasLocation.fY + SK_DistanceFieldInset; |
| u1 = u0 + width - 2 * SK_DistanceFieldInset; |
| v1 = v0 + height - 2 * SK_DistanceFieldInset; |
| } else { |
| u0 = glyph->fAtlasLocation.fX; |
| v0 = glyph->fAtlasLocation.fY; |
| u1 = u0 + width; |
| v1 = v0 + height; |
| } |
| |
| // normalize |
| u0 *= 65535; |
| u0 >>= log2Width; |
| u1 *= 65535; |
| u1 >>= log2Width; |
| v0 *= 65535; |
| v0 >>= log2Height; |
| v1 *= 65535; |
| v1 >>= log2Height; |
| SkASSERT(u0 >= 0 && u0 <= 65535); |
| SkASSERT(u1 >= 0 && u1 <= 65535); |
| SkASSERT(v0 >= 0 && v0 <= 65535); |
| SkASSERT(v1 >= 0 && v1 <= 65535); |
| } |
| |
| // This is a bit wonky, but sometimes we have LCD text, in which case we won't have color |
| // vertices, hence vertexStride - sizeof(SkIPoint16) |
| intptr_t colorOffset = sizeof(SkPoint); |
| intptr_t texCoordOffset = vertexStride - sizeof(SkIPoint16); |
| |
| // V0 |
| if (regenPos) { |
| SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| point->fX += transX; |
| point->fY += transY; |
| } |
| |
| if (regenCol) { |
| SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| *vcolor = color; |
| } |
| |
| if (regenTexCoords) { |
| uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| textureCoords[0] = (uint16_t) u0; |
| textureCoords[1] = (uint16_t) v0; |
| } |
| vertex += vertexStride; |
| |
| // V1 |
| if (regenPos) { |
| SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| point->fX += transX; |
| point->fY += transY; |
| } |
| |
| if (regenCol) { |
| SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| *vcolor = color; |
| } |
| |
| if (regenTexCoords) { |
| uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| textureCoords[0] = (uint16_t)u0; |
| textureCoords[1] = (uint16_t)v1; |
| } |
| vertex += vertexStride; |
| |
| // V2 |
| if (regenPos) { |
| SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| point->fX += transX; |
| point->fY += transY; |
| } |
| |
| if (regenCol) { |
| SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| *vcolor = color; |
| } |
| |
| if (regenTexCoords) { |
| uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| textureCoords[0] = (uint16_t)u1; |
| textureCoords[1] = (uint16_t)v1; |
| } |
| vertex += vertexStride; |
| |
| // V3 |
| if (regenPos) { |
| SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
| point->fX += transX; |
| point->fY += transY; |
| } |
| |
| if (regenCol) { |
| SkColor* vcolor = reinterpret_cast<SkColor*>(vertex + colorOffset); |
| *vcolor = color; |
| } |
| |
| if (regenTexCoords) { |
| uint16_t* textureCoords = reinterpret_cast<uint16_t*>(vertex + texCoordOffset); |
| textureCoords[0] = (uint16_t)u1; |
| textureCoords[1] = (uint16_t)v0; |
| } |
| } |
| |
| template <bool regenPos, bool regenCol, bool regenTexCoords, bool regenGlyphs> |
| void GrAtlasTextBlob::regenInOp(GrDrawOp::Target* target, GrAtlasGlyphCache* fontCache, |
| GrBlobRegenHelper* helper, Run* run, Run::SubRunInfo* info, |
| SkAutoGlyphCache* lazyCache, int glyphCount, size_t vertexStride, |
| GrColor color, SkScalar transX, SkScalar transY) const { |
| SkASSERT(lazyCache); |
| static_assert(!regenGlyphs || regenTexCoords, "must regenTexCoords along regenGlyphs"); |
| GrAtlasTextStrike* strike = nullptr; |
| if (regenTexCoords) { |
| info->resetBulkUseToken(); |
| |
| const SkDescriptor* desc = (run->fOverrideDescriptor && !info->drawAsDistanceFields()) |
| ? run->fOverrideDescriptor->getDesc() |
| : run->fDescriptor.getDesc(); |
| |
| if (!*lazyCache || (*lazyCache)->getDescriptor() != *desc) { |
| SkScalerContextEffects effects; |
| effects.fPathEffect = run->fPathEffect.get(); |
| effects.fRasterizer = run->fRasterizer.get(); |
| effects.fMaskFilter = run->fMaskFilter.get(); |
| lazyCache->reset(SkGlyphCache::DetachCache(run->fTypeface.get(), effects, desc)); |
| } |
| |
| if (regenGlyphs) { |
| strike = fontCache->getStrike(lazyCache->get()); |
| } else { |
| strike = info->strike(); |
| } |
| } |
| |
| bool brokenRun = false; |
| for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) { |
| GrGlyph* glyph = nullptr; |
| int log2Width = 0, log2Height = 0; |
| if (regenTexCoords) { |
| size_t glyphOffset = glyphIdx + info->glyphStartIndex(); |
| |
| if (regenGlyphs) { |
| // Get the id from the old glyph, and use the new strike to lookup |
| // the glyph. |
| GrGlyph::PackedID id = fGlyphs[glyphOffset]->fPackedID; |
| fGlyphs[glyphOffset] = strike->getGlyph(id, info->maskFormat(), lazyCache->get()); |
| SkASSERT(id == fGlyphs[glyphOffset]->fPackedID); |
| } |
| glyph = fGlyphs[glyphOffset]; |
| SkASSERT(glyph && glyph->fMaskFormat == info->maskFormat()); |
| |
| if (!fontCache->hasGlyph(glyph) && |
| !strike->addGlyphToAtlas(target, glyph, lazyCache->get(), info->maskFormat())) { |
| helper->flush(); |
| brokenRun = glyphIdx > 0; |
| |
| SkDEBUGCODE(bool success =) strike->addGlyphToAtlas(target, |
| glyph, |
| lazyCache->get(), |
| info->maskFormat()); |
| SkASSERT(success); |
| } |
| fontCache->addGlyphToBulkAndSetUseToken(info->bulkUseToken(), glyph, |
| target->nextDrawToken()); |
| log2Width = fontCache->log2Width(info->maskFormat()); |
| log2Height = fontCache->log2Height(info->maskFormat()); |
| } |
| |
| intptr_t vertex = reinterpret_cast<intptr_t>(fVertices); |
| vertex += info->vertexStartIndex(); |
| vertex += vertexStride * glyphIdx * GrAtlasTextOp::kVerticesPerGlyph; |
| regen_vertices<regenPos, regenCol, regenTexCoords>(vertex, glyph, vertexStride, |
| info->drawAsDistanceFields(), transX, |
| transY, log2Width, log2Height, color); |
| helper->incGlyphCount(); |
| } |
| |
| // We may have changed the color so update it here |
| info->setColor(color); |
| if (regenTexCoords) { |
| if (regenGlyphs) { |
| info->setStrike(strike); |
| } |
| info->setAtlasGeneration(brokenRun ? GrDrawOpAtlas::kInvalidAtlasGeneration |
| : fontCache->atlasGeneration(info->maskFormat())); |
| } |
| } |
| |
| enum RegenMask { |
| kNoRegen = 0x0, |
| kRegenPos = 0x1, |
| kRegenCol = 0x2, |
| kRegenTex = 0x4, |
| kRegenGlyph = 0x8 | kRegenTex, // we have to regenerate the texture coords when we regen glyphs |
| |
| // combinations |
| kRegenPosCol = kRegenPos | kRegenCol, |
| kRegenPosTex = kRegenPos | kRegenTex, |
| kRegenPosTexGlyph = kRegenPos | kRegenGlyph, |
| kRegenPosColTex = kRegenPos | kRegenCol | kRegenTex, |
| kRegenPosColTexGlyph = kRegenPos | kRegenCol | kRegenGlyph, |
| kRegenColTex = kRegenCol | kRegenTex, |
| kRegenColTexGlyph = kRegenCol | kRegenGlyph, |
| }; |
| |
| #define REGEN_ARGS target, fontCache, helper, &run, &info, lazyCache, \ |
| *glyphCount, vertexStride, color, transX, transY |
| |
| void GrAtlasTextBlob::regenInOp(GrDrawOp::Target* target, |
| GrAtlasGlyphCache* fontCache, |
| GrBlobRegenHelper* helper, |
| int runIndex, int subRunIndex, SkAutoGlyphCache* lazyCache, |
| size_t vertexStride, const SkMatrix& viewMatrix, |
| SkScalar x, SkScalar y, GrColor color, |
| void** vertices, size_t* byteCount, int* glyphCount) { |
| Run& run = fRuns[runIndex]; |
| Run::SubRunInfo& info = run.fSubRunInfo[subRunIndex]; |
| |
| uint64_t currentAtlasGen = fontCache->atlasGeneration(info.maskFormat()); |
| |
| // Compute translation if any |
| SkScalar transX, transY; |
| info.computeTranslation(viewMatrix, x, y, &transX, &transY); |
| |
| // Because the GrAtlasGlyphCache may evict the strike a blob depends on using for |
| // generating its texture coords, we have to track whether or not the strike has |
| // been abandoned. If it hasn't been abandoned, then we can use the GrGlyph*s as is |
| // otherwise we have to get the new strike, and use that to get the correct glyphs. |
| // Because we do not have the packed ids, and thus can't look up our glyphs in the |
| // new strike, we instead keep our ref to the old strike and use the packed ids from |
| // it. These ids will still be valid as long as we hold the ref. When we are done |
| // updating our cache of the GrGlyph*s, we drop our ref on the old strike |
| bool regenerateGlyphs = info.strike()->isAbandoned(); |
| bool regenerateTextureCoords = info.atlasGeneration() != currentAtlasGen || |
| regenerateGlyphs; |
| bool regenerateColors = kARGB_GrMaskFormat != info.maskFormat() && |
| info.color() != color; |
| bool regeneratePositions = transX != 0.f || transY != 0.f; |
| *glyphCount = info.glyphCount(); |
| |
| uint32_t regenMaskBits = kNoRegen; |
| regenMaskBits |= regeneratePositions ? kRegenPos : 0; |
| regenMaskBits |= regenerateColors ? kRegenCol : 0; |
| regenMaskBits |= regenerateTextureCoords ? kRegenTex : 0; |
| regenMaskBits |= regenerateGlyphs ? kRegenGlyph : 0; |
| RegenMask regenMask = (RegenMask)regenMaskBits; |
| |
| switch (regenMask) { |
| case kRegenPos: |
| this->regenInOp<true, false, false, false>(REGEN_ARGS); |
| break; |
| case kRegenCol: |
| this->regenInOp<false, true, false, false>(REGEN_ARGS); |
| break; |
| case kRegenTex: |
| this->regenInOp<false, false, true, false>(REGEN_ARGS); |
| break; |
| case kRegenGlyph: |
| this->regenInOp<false, false, true, true>(REGEN_ARGS); |
| break; |
| |
| // combinations |
| case kRegenPosCol: |
| this->regenInOp<true, true, false, false>(REGEN_ARGS); |
| break; |
| case kRegenPosTex: |
| this->regenInOp<true, false, true, false>(REGEN_ARGS); |
| break; |
| case kRegenPosTexGlyph: |
| this->regenInOp<true, false, true, true>(REGEN_ARGS); |
| break; |
| case kRegenPosColTex: |
| this->regenInOp<true, true, true, false>(REGEN_ARGS); |
| break; |
| case kRegenPosColTexGlyph: |
| this->regenInOp<true, true, true, true>(REGEN_ARGS); |
| break; |
| case kRegenColTex: |
| this->regenInOp<false, true, true, false>(REGEN_ARGS); |
| break; |
| case kRegenColTexGlyph: |
| this->regenInOp<false, true, true, true>(REGEN_ARGS); |
| break; |
| case kNoRegen: |
| helper->incGlyphCount(*glyphCount); |
| |
| // set use tokens for all of the glyphs in our subrun. This is only valid if we |
| // have a valid atlas generation |
| fontCache->setUseTokenBulk(*info.bulkUseToken(), target->nextDrawToken(), |
| info.maskFormat()); |
| break; |
| } |
| |
| *byteCount = info.byteCount(); |
| *vertices = fVertices + info.vertexStartIndex(); |
| } |
