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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrAtlasManager.h"
#include "GrGlyph.h"
#include "GrGlyphCache.h"
void GrAtlasManager::ComputeAtlasLimits(int maxTextureSize, size_t maxTextureBytes, int* maxDim,
int* minDim, int* maxPlot, int* minPlot) {
SkASSERT(maxDim && minDim && maxPlot && minPlot);
// Calculate RGBA size. Must be between 512 x 256 and MaxTextureSize x MaxTextureSize / 2
int log2MaxTextureSize = SkPrevLog2(maxTextureSize);
int log2MaxDim = 9;
static const size_t kOne = 1u;
for (; log2MaxDim <= log2MaxTextureSize; ++log2MaxDim) {
size_t maxDimTmp = kOne << log2MaxDim;
size_t minDimTmp = kOne << (log2MaxDim - 1);
if (maxDimTmp * minDimTmp * 4 >= maxTextureBytes) {
break;
}
}
int log2MinDim = log2MaxDim - 1;
*maxDim = 1 << log2MaxDim;
*minDim = 1 << log2MinDim;
// Plots are either 256 or 512.
*maxPlot = SkTMin(512, SkTMax(256, 1 << (log2MaxDim - 2)));
*minPlot = SkTMin(512, SkTMax(256, 1 << (log2MaxDim - 3)));
}
GrAtlasManager::GrAtlasManager(GrProxyProvider* proxyProvider, GrGlyphCache* glyphCache,
float maxTextureBytes,
GrDrawOpAtlas::AllowMultitexturing allowMultitexturing)
: fAllowMultitexturing(allowMultitexturing)
, fProxyProvider(proxyProvider)
, fGlyphCache(glyphCache) {
fCaps = fProxyProvider->refCaps();
int maxDim, minDim, maxPlot, minPlot;
ComputeAtlasLimits(fCaps->maxTextureSize(), maxTextureBytes, &maxDim, &minDim, &maxPlot,
&minPlot);
// Setup default atlas configs. The A8 atlas uses maxDim for both width and height, as the A8
// format is already very compact.
fAtlasConfigs[kA8_GrMaskFormat].fWidth = maxDim;
fAtlasConfigs[kA8_GrMaskFormat].fHeight = maxDim;
fAtlasConfigs[kA8_GrMaskFormat].fPlotWidth = maxPlot;
fAtlasConfigs[kA8_GrMaskFormat].fPlotHeight = minPlot;
// A565 and ARGB use maxDim x minDim.
fAtlasConfigs[kA565_GrMaskFormat].fWidth = minDim;
fAtlasConfigs[kA565_GrMaskFormat].fHeight = maxDim;
fAtlasConfigs[kA565_GrMaskFormat].fPlotWidth = minPlot;
fAtlasConfigs[kA565_GrMaskFormat].fPlotHeight = minPlot;
fAtlasConfigs[kARGB_GrMaskFormat].fWidth = minDim;
fAtlasConfigs[kARGB_GrMaskFormat].fHeight = maxDim;
fAtlasConfigs[kARGB_GrMaskFormat].fPlotWidth = minPlot;
fAtlasConfigs[kARGB_GrMaskFormat].fPlotHeight = minPlot;
fGlyphSizeLimit = minPlot;
}
GrAtlasManager::~GrAtlasManager() {
}
static GrPixelConfig mask_format_to_pixel_config(GrMaskFormat format) {
switch (format) {
case kA8_GrMaskFormat:
return kAlpha_8_GrPixelConfig;
case kA565_GrMaskFormat:
return kRGB_565_GrPixelConfig;
case kARGB_GrMaskFormat:
return kRGBA_8888_GrPixelConfig;
default:
SkDEBUGFAIL("unsupported GrMaskFormat");
return kAlpha_8_GrPixelConfig;
}
}
void GrAtlasManager::freeAll() {
for (int i = 0; i < kMaskFormatCount; ++i) {
fAtlases[i] = nullptr;
}
}
bool GrAtlasManager::hasGlyph(GrGlyph* glyph) {
SkASSERT(glyph);
return this->getAtlas(glyph->fMaskFormat)->hasID(glyph->fID);
}
// add to texture atlas that matches this format
GrDrawOpAtlas::ErrorCode GrAtlasManager::addToAtlas(
GrResourceProvider* resourceProvider,
GrGlyphCache* glyphCache,
GrTextStrike* strike, GrDrawOpAtlas::AtlasID* id,
GrDeferredUploadTarget* target, GrMaskFormat format,
int width, int height, const void* image, SkIPoint16* loc) {
glyphCache->setStrikeToPreserve(strike);
return this->getAtlas(format)->addToAtlas(resourceProvider, id, target, width, height,
image, loc);
}
void GrAtlasManager::addGlyphToBulkAndSetUseToken(GrDrawOpAtlas::BulkUseTokenUpdater* updater,
GrGlyph* glyph,
GrDeferredUploadToken token) {
SkASSERT(glyph);
updater->add(glyph->fID);
this->getAtlas(glyph->fMaskFormat)->setLastUseToken(glyph->fID, token);
}
#ifdef SK_DEBUG
#include "GrContextPriv.h"
#include "GrSurfaceProxy.h"
#include "GrSurfaceContext.h"
#include "GrTextureProxy.h"
#include "SkBitmap.h"
#include "SkImageEncoder.h"
#include "SkStream.h"
#include <stdio.h>
/**
* Write the contents of the surface proxy to a PNG. Returns true if successful.
* @param filename Full path to desired file
*/
static bool save_pixels(GrContext* context, GrSurfaceProxy* sProxy, const char* filename) {
if (!sProxy) {
return false;
}
SkImageInfo ii = SkImageInfo::Make(sProxy->width(), sProxy->height(),
kRGBA_8888_SkColorType, kPremul_SkAlphaType);
SkBitmap bm;
if (!bm.tryAllocPixels(ii)) {
return false;
}
sk_sp<GrSurfaceContext> sContext(context->contextPriv().makeWrappedSurfaceContext(
sk_ref_sp(sProxy)));
if (!sContext || !sContext->asTextureProxy()) {
return false;
}
bool result = sContext->readPixels(ii, bm.getPixels(), bm.rowBytes(), 0, 0);
if (!result) {
SkDebugf("------ failed to read pixels for %s\n", filename);
return false;
}
// remove any previous version of this file
remove(filename);
SkFILEWStream file(filename);
if (!file.isValid()) {
SkDebugf("------ failed to create file: %s\n", filename);
remove(filename); // remove any partial file
return false;
}
if (!SkEncodeImage(&file, bm, SkEncodedImageFormat::kPNG, 100)) {
SkDebugf("------ failed to encode %s\n", filename);
remove(filename); // remove any partial file
return false;
}
return true;
}
void GrAtlasManager::dump(GrContext* context) const {
static int gDumpCount = 0;
for (int i = 0; i < kMaskFormatCount; ++i) {
if (fAtlases[i]) {
const sk_sp<GrTextureProxy>* proxies = fAtlases[i]->getProxies();
for (uint32_t pageIdx = 0; pageIdx < fAtlases[i]->numActivePages(); ++pageIdx) {
SkASSERT(proxies[pageIdx]);
SkString filename;
#ifdef SK_BUILD_FOR_ANDROID
filename.printf("/sdcard/fontcache_%d%d%d.png", gDumpCount, i, pageIdx);
#else
filename.printf("fontcache_%d%d%d.png", gDumpCount, i, pageIdx);
#endif
save_pixels(context, proxies[pageIdx].get(), filename.c_str());
}
}
}
++gDumpCount;
}
#endif
void GrAtlasManager::setAtlasSizes_ForTesting(const GrDrawOpAtlasConfig 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++) {
fAtlases[i] = nullptr;
}
memcpy(fAtlasConfigs, configs, sizeof(fAtlasConfigs));
}
bool GrAtlasManager::initAtlas(GrMaskFormat format) {
int index = MaskFormatToAtlasIndex(format);
if (!fAtlases[index]) {
GrPixelConfig config = mask_format_to_pixel_config(format);
int width = fAtlasConfigs[index].fWidth;
int height = fAtlasConfigs[index].fHeight;
int numPlotsX = fAtlasConfigs[index].numPlotsX();
int numPlotsY = fAtlasConfigs[index].numPlotsY();
fAtlases[index] = GrDrawOpAtlas::Make(fProxyProvider, config, width, height,
numPlotsX, numPlotsY, fAllowMultitexturing,
&GrGlyphCache::HandleEviction,
fGlyphCache);
if (!fAtlases[index]) {
return false;
}
}
return true;
}
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