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/*
* 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, const SkGlyph& skGlyph,
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);
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;
}
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