bool GrFontCache::freeUnusedPlot(GrTextStrike* preserveStrike, const GrGlyph* glyph) {
SkASSERT(preserveStrike);
int index = mask_format_to_atlas_index(glyph->fMaskFormat);
GrAtlas* atlas = fAtlases[index];
GrPlot* plot = atlas->getUnusedPlot();
if (NULL == plot) {
return false;
}
plot->resetRects();
GrTextStrike* strike = fHead;
while (strike) {
GrTextStrike* strikeToPurge = strike;
strike = strikeToPurge->fNext;
strikeToPurge->removePlot(plot);
// clear out any empty strikes (except this one)
if (strikeToPurge != preserveStrike && strikeToPurge->fPlotUsage.isEmpty()) {
this->purgeStrike(strikeToPurge);
}
}
#if FONT_CACHE_STATS
++g_PurgeCount;
#endif
return true;
}
GrTextStrike* GrFontCache::generateStrike(GrFontScaler* scaler) {
GrMaskFormat format = scaler->getMaskFormat();
GrPixelConfig config = mask_format_to_pixel_config(format);
int atlasIndex = mask_format_to_atlas_index(format);
if (NULL == fAtlases[atlasIndex]) {
SkISize textureSize = SkISize::Make(GR_ATLAS_TEXTURE_WIDTH,
GR_ATLAS_TEXTURE_HEIGHT);
fAtlases[atlasIndex] = SkNEW_ARGS(GrAtlas, (fGpu, config, kNone_GrTextureFlags,
textureSize,
GR_NUM_PLOTS_X,
GR_NUM_PLOTS_Y,
true));
}
GrTextStrike* strike = SkNEW_ARGS(GrTextStrike,
(this, scaler->getKey(), format, fAtlases[atlasIndex]));
fCache.add(strike);
if (fHead) {
fHead->fPrev = strike;
} else {
SkASSERT(NULL == fTail);
fTail = strike;
}
strike->fPrev = NULL;
strike->fNext = fHead;
fHead = strike;
return strike;
}
GrPlot* GrFontCache::addToAtlas(GrMaskFormat format, GrAtlas::ClientPlotUsage* usage,
int width, int height, const void* image,
SkIPoint16* loc) {
GrPixelConfig config = mask_format_to_pixel_config(format);
int atlasIndex = mask_format_to_atlas_index(format);
if (NULL == fAtlases[atlasIndex]) {
SkISize textureSize = SkISize::Make(GR_ATLAS_TEXTURE_WIDTH,
GR_ATLAS_TEXTURE_HEIGHT);
fAtlases[atlasIndex] = SkNEW_ARGS(GrAtlas, (fGpu, config, kNone_GrSurfaceFlags,
textureSize,
GR_NUM_PLOTS_X,
GR_NUM_PLOTS_Y,
true));
}
return fAtlases[atlasIndex]->addToAtlas(usage, width, height, image, loc);
}
