Move all text stuff to its own folder

src/gpu/GrBatchFontCache.cpp

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrBatchFontCache.h"
-#include "GrContext.h"
-#include "GrGpu.h"
-#include "GrRectanizer.h"
-#include "GrResourceProvider.h"
-#include "GrSurfacePriv.h"
-#include "SkString.h"
-
-#include "SkDistanceFieldGen.h"
-
-///////////////////////////////////////////////////////////////////////////////
-
-bool GrBatchFontCache::initAtlas(GrMaskFormat format) {
-    int index = MaskFormatToAtlasIndex(format);
-    if (!fAtlases[index]) {
-        GrPixelConfig config = MaskFormatToPixelConfig(format);
-        int width = fAtlasConfigs[index].fWidth;
-        int height = fAtlasConfigs[index].fHeight;
-        int numPlotsX = fAtlasConfigs[index].numPlotsX();
-        int numPlotsY = fAtlasConfigs[index].numPlotsY();
-
-        fAtlases[index] =
-                fContext->resourceProvider()->createAtlas(config, width, height,
-                                                          numPlotsX, numPlotsY,
-                                                          &GrBatchFontCache::HandleEviction,
-                                                          (void*)this);
-        if (!fAtlases[index]) {
-            return false;
-        }
-    }
-    return true;
-}
-
-GrBatchFontCache::GrBatchFontCache(GrContext* context)
-    : fContext(context)
-    , fPreserveStrike(nullptr) {
-    for (int i = 0; i < kMaskFormatCount; ++i) {
-        fAtlases[i] = nullptr;
-    }
-
-    // setup default atlas configs
-    fAtlasConfigs[kA8_GrMaskFormat].fWidth = 2048;
-    fAtlasConfigs[kA8_GrMaskFormat].fHeight = 2048;
-    fAtlasConfigs[kA8_GrMaskFormat].fPlotWidth = 512;
-    fAtlasConfigs[kA8_GrMaskFormat].fPlotHeight = 256;
-
-    fAtlasConfigs[kA565_GrMaskFormat].fWidth = 1024;
-    fAtlasConfigs[kA565_GrMaskFormat].fHeight = 2048;
-    fAtlasConfigs[kA565_GrMaskFormat].fPlotWidth = 256;
-    fAtlasConfigs[kA565_GrMaskFormat].fPlotHeight = 256;
-
-    fAtlasConfigs[kARGB_GrMaskFormat].fWidth = 1024;
-    fAtlasConfigs[kARGB_GrMaskFormat].fHeight = 2048;
-    fAtlasConfigs[kARGB_GrMaskFormat].fPlotWidth = 256;
-    fAtlasConfigs[kARGB_GrMaskFormat].fPlotHeight = 256;
-}
-
-GrBatchFontCache::~GrBatchFontCache() {
-    SkTDynamicHash<GrBatchTextStrike, GrFontDescKey>::Iter iter(&fCache);
-    while (!iter.done()) {
-        (*iter).fIsAbandoned = true;
-        (*iter).unref();
-        ++iter;
-    }
-    for (int i = 0; i < kMaskFormatCount; ++i) {
-        delete fAtlases[i];
-    }
-}
-
-void GrBatchFontCache::freeAll() {
-    SkTDynamicHash<GrBatchTextStrike, GrFontDescKey>::Iter iter(&fCache);
-    while (!iter.done()) {
-        (*iter).fIsAbandoned = true;
-        (*iter).unref();
-        ++iter;
-    }
-    fCache.rewind();
-    for (int i = 0; i < kMaskFormatCount; ++i) {
-        delete fAtlases[i];
-        fAtlases[i] = nullptr;
-    }
-}
-
-void GrBatchFontCache::HandleEviction(GrBatchAtlas::AtlasID id, void* ptr) {
-    GrBatchFontCache* fontCache = reinterpret_cast<GrBatchFontCache*>(ptr);
-
-    SkTDynamicHash<GrBatchTextStrike, GrFontDescKey>::Iter iter(&fontCache->fCache);
-    for (; !iter.done(); ++iter) {
-        GrBatchTextStrike* strike = &*iter;
-        strike->removeID(id);
-
-        // clear out any empty strikes.  We will preserve the strike whose call to addToAtlas
-        // triggered the eviction
-        if (strike != fontCache->fPreserveStrike && 0 == strike->fAtlasedGlyphs) {
-            fontCache->fCache.remove(*(strike->fFontScalerKey));
-            strike->fIsAbandoned = true;
-            strike->unref();
-        }
-    }
-}
-
-void GrBatchFontCache::dump() const {
-    static int gDumpCount = 0;
-    for (int i = 0; i < kMaskFormatCount; ++i) {
-        if (fAtlases[i]) {
-            GrTexture* texture = fAtlases[i]->getTexture();
-            if (texture) {
-                SkString filename;
-#ifdef SK_BUILD_FOR_ANDROID
-                filename.printf("/sdcard/fontcache_%d%d.png", gDumpCount, i);
-#else
-                filename.printf("fontcache_%d%d.png", gDumpCount, i);
-#endif
-                texture->surfacePriv().savePixels(filename.c_str());
-            }
-        }
-    }
-    ++gDumpCount;
-}
-
-void GrBatchFontCache::setAtlasSizes_ForTesting(const GrBatchAtlasConfig configs[3]) {
-    // delete any old atlases, this should be safe to do as long as we are not in the middle of a
-    // flush
-    for (int i = 0; i < kMaskFormatCount; i++) {
-        if (fAtlases[i]) {
-            delete fAtlases[i];
-            fAtlases[i] = nullptr;
-        }
-    }
-    memcpy(fAtlasConfigs, configs, sizeof(fAtlasConfigs));
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-/*
-    The text strike is specific to a given font/style/matrix setup, which is
-    represented by the GrHostFontScaler object we are given in getGlyph().
-
-    We map a 32bit glyphID to a GrGlyph record, which in turn points to a
-    atlas and a position within that texture.
- */
-
-GrBatchTextStrike::GrBatchTextStrike(GrBatchFontCache* cache, const GrFontDescKey* key)
-    : fFontScalerKey(SkRef(key))
-    , fPool(9/*start allocations at 512 bytes*/)
-    , fAtlasedGlyphs(0)
-    , fIsAbandoned(false) {
-
-    fBatchFontCache = cache;     // no need to ref, it won't go away before we do
-}
-
-GrBatchTextStrike::~GrBatchTextStrike() {
-    SkTDynamicHash<GrGlyph, GrGlyph::PackedID>::Iter iter(&fCache);
-    while (!iter.done()) {
-        (*iter).free();
-        ++iter;
-    }
-}
-
-GrGlyph* GrBatchTextStrike::generateGlyph(const SkGlyph& skGlyph, GrGlyph::PackedID packed,
-                                          GrFontScaler* scaler) {
-    SkIRect bounds;
-    if (GrGlyph::kDistance_MaskStyle == GrGlyph::UnpackMaskStyle(packed)) {
-        if (!scaler->getPackedGlyphDFBounds(skGlyph, &bounds)) {
-            return nullptr;
-        }
-    } else {
-        if (!scaler->getPackedGlyphBounds(skGlyph, &bounds)) {
-            return nullptr;
-        }
-    }
-    GrMaskFormat format = scaler->getPackedGlyphMaskFormat(skGlyph);
-
-    GrGlyph* glyph = (GrGlyph*)fPool.alloc(sizeof(GrGlyph));
-    glyph->init(packed, bounds, format);
-    fCache.add(glyph);
-    return glyph;
-}
-
-void GrBatchTextStrike::removeID(GrBatchAtlas::AtlasID id) {
-    SkTDynamicHash<GrGlyph, GrGlyph::PackedID>::Iter iter(&fCache);
-    while (!iter.done()) {
-        if (id == (*iter).fID) {
-            (*iter).fID = GrBatchAtlas::kInvalidAtlasID;
-            fAtlasedGlyphs--;
-            SkASSERT(fAtlasedGlyphs >= 0);
-        }
-        ++iter;
-    }
-}
-
-bool GrBatchTextStrike::addGlyphToAtlas(GrDrawBatch::Target* target,
-                                        GrGlyph* glyph,
-                                        GrFontScaler* scaler,
-                                        GrMaskFormat expectedMaskFormat) {
-    SkASSERT(glyph);
-    SkASSERT(scaler);
-    SkASSERT(fCache.find(glyph->fPackedID));
-
-    SkAutoUnref ar(SkSafeRef(scaler));
-
-    int bytesPerPixel = GrMaskFormatBytesPerPixel(expectedMaskFormat);
-
-    size_t size = glyph->fBounds.area() * bytesPerPixel;
-    SkAutoSMalloc<1024> storage(size);
-
-    const SkGlyph& skGlyph = scaler->grToSkGlyph(glyph->fPackedID);
-    if (GrGlyph::kDistance_MaskStyle == GrGlyph::UnpackMaskStyle(glyph->fPackedID)) {
-        if (!scaler->getPackedGlyphDFImage(skGlyph, glyph->width(), glyph->height(),
-                                           storage.get())) {
-            return false;
-        }
-    } else {
-        if (!scaler->getPackedGlyphImage(skGlyph, glyph->width(), glyph->height(),
-                                         glyph->width() * bytesPerPixel, expectedMaskFormat,
-                                         storage.get())) {
-            return false;
-        }
-    }
-
-    bool success = fBatchFontCache->addToAtlas(this, &glyph->fID, target, expectedMaskFormat,
-                                               glyph->width(), glyph->height(),
-                                               storage.get(), &glyph->fAtlasLocation);
-    if (success) {
-        SkASSERT(GrBatchAtlas::kInvalidAtlasID != glyph->fID);
-        fAtlasedGlyphs++;
-    }
-    return success;
-}