| /* |
| * 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(); |
| size_t offset = bitmap.pixelRefOffset(); |
| int16_t width = static_cast<int16_t>(bitmap.width()); |
| int16_t height = static_cast<int16_t>(bitmap.height()); |
| |
| GrCacheID::Key key; |
| memcpy(key.fData8, &genID, 4); |
| memcpy(key.fData8 + 4, &width, 2); |
| memcpy(key.fData8 + 6, &height, 2); |
| memcpy(key.fData8 + 8, &offset, sizeof(size_t)); |
| static const size_t kKeyDataSize = 8 + sizeof(size_t); |
| memset(key.fData8 + kKeyDataSize, 0, sizeof(key) - kKeyDataSize); |
| GR_STATIC_ASSERT(sizeof(key) >= 8 + sizeof(size_t)); |
| 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); |
| 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, SkBitmap::kARGB_8888_Config); |
| // 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); |
| 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; |
| } |
| } |