The Tor Browser: comparison gfx/skia/trunk/src/gpu/SkGr.cpp

--1:000000000000
+:e3435c69071f
+/*
+* Copyright 2010 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+#include "SkGr.h"
+#include "SkConfig8888.h"
+#include "SkMessageBus.h"
+#include "SkPixelRef.h"
+#include "GrResourceCache.h"
+/*  Fill out buffer with the compressed format Ganesh expects from a colortable
+based bitmap. [palette (colortable) + indices].
+At the moment Ganesh only supports 8bit version. If Ganesh allowed we others
+we could detect that the colortable.count is <= 16, and then repack the
+indices as nibbles to save RAM, but it would take more time (i.e. a lot
+slower than memcpy), so skipping that for now.
+Ganesh wants a full 256 palette entry, even though Skia's ctable is only as big
+as the colortable.count says it is.
+*/
+static void build_compressed_data(void* buffer, const SkBitmap& bitmap) {
+SkASSERT(SkBitmap::kIndex8_Config == bitmap.config());
+SkAutoLockPixels alp(bitmap);
+if (!bitmap.readyToDraw()) {
+SkDEBUGFAIL("bitmap not ready to draw!");
+return;
+}
+SkColorTable* ctable = bitmap.getColorTable();
+char* dst = (char*)buffer;
+uint32_t* colorTableDst = reinterpret_cast<uint32_t*>(dst);
+const uint32_t* colorTableSrc = reinterpret_cast<const uint32_t*>(ctable->lockColors());
+SkConvertConfig8888Pixels(colorTableDst, 0, SkCanvas::kRGBA_Premul_Config8888,
+colorTableSrc, 0, SkCanvas::kNative_Premul_Config8888,
+ctable->count(), 1);
+ctable->unlockColors();
+// always skip a full 256 number of entries, even if we memcpy'd fewer
+dst += kGrColorTableSize;
+if ((unsigned)bitmap.width() == bitmap.rowBytes()) {
+memcpy(dst, bitmap.getPixels(), bitmap.getSize());
+} else {
+// need to trim off the extra bytes per row
+size_t width = bitmap.width();
+size_t rowBytes = bitmap.rowBytes();
+const char* src = (const char*)bitmap.getPixels();
+for (int y = 0; y < bitmap.height(); y++) {
+memcpy(dst, src, width);
+src += rowBytes;
+dst += width;
+}
+}
+}
+////////////////////////////////////////////////////////////////////////////////
+static void generate_bitmap_cache_id(const SkBitmap& bitmap, GrCacheID* id) {
+// Our id includes the offset, width, and height so that bitmaps created by extractSubset()
+// are unique.
+uint32_t genID = bitmap.getGenerationID();
+SkIPoint origin = bitmap.pixelRefOrigin();
+int16_t width = SkToS16(bitmap.width());
+int16_t height = SkToS16(bitmap.height());
+GrCacheID::Key key;
+memcpy(key.fData8 +  0, &genID,     4);
+memcpy(key.fData8 +  4, &origin.fX, 4);
+memcpy(key.fData8 +  8, &origin.fY, 4);
+memcpy(key.fData8 + 12, &width,     2);
+memcpy(key.fData8 + 14, &height,    2);
+static const size_t kKeyDataSize = 16;
+memset(key.fData8 + kKeyDataSize, 0, sizeof(key) - kKeyDataSize);
+GR_STATIC_ASSERT(sizeof(key) >= kKeyDataSize);
+static const GrCacheID::Domain gBitmapTextureDomain = GrCacheID::GenerateDomain();
+id->reset(gBitmapTextureDomain, key);
+}
+static void generate_bitmap_texture_desc(const SkBitmap& bitmap, GrTextureDesc* desc) {
+desc->fFlags = kNone_GrTextureFlags;
+desc->fWidth = bitmap.width();
+desc->fHeight = bitmap.height();
+desc->fConfig = SkBitmapConfig2GrPixelConfig(bitmap.config());
+desc->fSampleCnt = 0;
+}
+namespace {
+// When the SkPixelRef genID changes, invalidate a corresponding GrResource described by key.
+class GrResourceInvalidator : public SkPixelRef::GenIDChangeListener {
+public:
+explicit GrResourceInvalidator(GrResourceKey key) : fKey(key) {}
+private:
+GrResourceKey fKey;
+virtual void onChange() SK_OVERRIDE {
+const GrResourceInvalidatedMessage message = { fKey };
+SkMessageBus<GrResourceInvalidatedMessage>::Post(message);
+}
+};
+}  // namespace
+static void add_genID_listener(GrResourceKey key, SkPixelRef* pixelRef) {
+SkASSERT(NULL != pixelRef);
+pixelRef->addGenIDChangeListener(SkNEW_ARGS(GrResourceInvalidator, (key)));
+}
+static GrTexture* sk_gr_create_bitmap_texture(GrContext* ctx,
+bool cache,
+const GrTextureParams* params,
+const SkBitmap& origBitmap) {
+SkBitmap tmpBitmap;
+const SkBitmap* bitmap = &origBitmap;
+GrTextureDesc desc;
+generate_bitmap_texture_desc(*bitmap, &desc);
+if (SkBitmap::kIndex8_Config == bitmap->config()) {
+// build_compressed_data doesn't do npot->pot expansion
+// and paletted textures can't be sub-updated
+if (ctx->supportsIndex8PixelConfig(params, bitmap->width(), bitmap->height())) {
+size_t imagesize = bitmap->width() * bitmap->height() + kGrColorTableSize;
+SkAutoMalloc storage(imagesize);
+build_compressed_data(storage.get(), origBitmap);
+// our compressed data will be trimmed, so pass width() for its
+// "rowBytes", since they are the same now.
+if (cache) {
+GrCacheID cacheID;
+generate_bitmap_cache_id(origBitmap, &cacheID);
+GrResourceKey key;
+GrTexture* result = ctx->createTexture(params, desc, cacheID,
+storage.get(), bitmap->width(), &key);
+if (NULL != result) {
+add_genID_listener(key, origBitmap.pixelRef());
+}
+return result;
+} else {
+GrTexture* result = ctx->lockAndRefScratchTexture(desc,
+GrContext::kExact_ScratchTexMatch);
+result->writePixels(0, 0, bitmap->width(),
+bitmap->height(), desc.fConfig,
+storage.get());
+return result;
+}
+} else {
+origBitmap.copyTo(&tmpBitmap, kPMColor_SkColorType);
+// now bitmap points to our temp, which has been promoted to 32bits
+bitmap = &tmpBitmap;
+desc.fConfig = SkBitmapConfig2GrPixelConfig(bitmap->config());
+}
+}
+SkAutoLockPixels alp(*bitmap);
+if (!bitmap->readyToDraw()) {
+return NULL;
+}
+if (cache) {
+// This texture is likely to be used again so leave it in the cache
+GrCacheID cacheID;
+generate_bitmap_cache_id(origBitmap, &cacheID);
+GrResourceKey key;
+GrTexture* result = ctx->createTexture(params, desc, cacheID,
+bitmap->getPixels(), bitmap->rowBytes(), &key);
+if (NULL != result) {
+add_genID_listener(key, origBitmap.pixelRef());
+}
+return result;
+} else {
+// This texture is unlikely to be used again (in its present form) so
+// just use a scratch texture. This will remove the texture from the
+// cache so no one else can find it. Additionally, once unlocked, the
+// scratch texture will go to the end of the list for purging so will
+// likely be available for this volatile bitmap the next time around.
+GrTexture* result = ctx->lockAndRefScratchTexture(desc, GrContext::kExact_ScratchTexMatch);
+result->writePixels(0, 0,
+bitmap->width(), bitmap->height(),
+desc.fConfig,
+bitmap->getPixels(),
+bitmap->rowBytes());
+return result;
+}
+}
+bool GrIsBitmapInCache(const GrContext* ctx,
+const SkBitmap& bitmap,
+const GrTextureParams* params) {
+GrCacheID cacheID;
+generate_bitmap_cache_id(bitmap, &cacheID);
+GrTextureDesc desc;
+generate_bitmap_texture_desc(bitmap, &desc);
+return ctx->isTextureInCache(desc, cacheID, params);
+}
+GrTexture* GrLockAndRefCachedBitmapTexture(GrContext* ctx,
+const SkBitmap& bitmap,
+const GrTextureParams* params) {
+GrTexture* result = NULL;
+bool cache = !bitmap.isVolatile();
+if (cache) {
+// If the bitmap isn't changing try to find a cached copy first.
+GrCacheID cacheID;
+generate_bitmap_cache_id(bitmap, &cacheID);
+GrTextureDesc desc;
+generate_bitmap_texture_desc(bitmap, &desc);
+result = ctx->findAndRefTexture(desc, cacheID, params);
+}
+if (NULL == result) {
+result = sk_gr_create_bitmap_texture(ctx, cache, params, bitmap);
+}
+if (NULL == result) {
+GrPrintf("---- failed to create texture for cache [%d %d]\n",
+bitmap.width(), bitmap.height());
+}
+return result;
+}
+void GrUnlockAndUnrefCachedBitmapTexture(GrTexture* texture) {
+SkASSERT(NULL != texture->getContext());
+texture->getContext()->unlockScratchTexture(texture);
+texture->unref();
+}
+///////////////////////////////////////////////////////////////////////////////
+GrPixelConfig SkBitmapConfig2GrPixelConfig(SkBitmap::Config config) {
+switch (config) {
+case SkBitmap::kA8_Config:
+return kAlpha_8_GrPixelConfig;
+case SkBitmap::kIndex8_Config:
+return kIndex_8_GrPixelConfig;
+case SkBitmap::kRGB_565_Config:
+return kRGB_565_GrPixelConfig;
+case SkBitmap::kARGB_4444_Config:
+return kRGBA_4444_GrPixelConfig;
+case SkBitmap::kARGB_8888_Config:
+return kSkia8888_GrPixelConfig;
+default:
+// kNo_Config, kA1_Config missing
+return kUnknown_GrPixelConfig;
+}
+}
+// alphatype is ignore for now, but if GrPixelConfig is expanded to encompass
+// alpha info, that will be considered.
+GrPixelConfig SkImageInfo2GrPixelConfig(SkColorType ct, SkAlphaType) {
+switch (ct) {
+case kUnknown_SkColorType:
+return kUnknown_GrPixelConfig;
+case kAlpha_8_SkColorType:
+return kAlpha_8_GrPixelConfig;
+case kRGB_565_SkColorType:
+return kRGB_565_GrPixelConfig;
+case kARGB_4444_SkColorType:
+return kRGBA_4444_GrPixelConfig;
+case kRGBA_8888_SkColorType:
+return kRGBA_8888_GrPixelConfig;
+case kBGRA_8888_SkColorType:
+return kBGRA_8888_GrPixelConfig;
+case kIndex_8_SkColorType:
+return kIndex_8_GrPixelConfig;
+}
+SkASSERT(0);    // shouldn't get here
+return kUnknown_GrPixelConfig;
+}
+bool GrPixelConfig2ColorType(GrPixelConfig config, SkColorType* ctOut) {
+SkColorType ct;
+switch (config) {
+case kAlpha_8_GrPixelConfig:
+ct = kAlpha_8_SkColorType;
+break;
+case kIndex_8_GrPixelConfig:
+ct = kIndex_8_SkColorType;
+break;
+case kRGB_565_GrPixelConfig:
+ct = kRGB_565_SkColorType;
+break;
+case kRGBA_4444_GrPixelConfig:
+ct = kARGB_4444_SkColorType;
+break;
+case kRGBA_8888_GrPixelConfig:
+ct = kRGBA_8888_SkColorType;
+break;
+case kBGRA_8888_GrPixelConfig:
+ct = kBGRA_8888_SkColorType;
+break;
+default:
+return false;
+}
+if (ctOut) {
+*ctOut = ct;
+}
+return true;
+}

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comparison: gfx/skia/trunk/src/gpu/SkGr.cpp

gfx/skia/trunk/src/gpu/SkGr.cpp