| /* |
| * 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 "SkBitmap.h" |
| #include "SkBitmapCache.h" |
| #include "SkImageCacherator.h" |
| #include "SkMallocPixelRef.h" |
| #include "SkNextID.h" |
| #include "SkPixelRef.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "GrGpuResourcePriv.h" |
| #include "GrResourceKey.h" |
| #include "GrTextureAccess.h" |
| #include "SkGr.h" |
| #include "SkGrPriv.h" |
| #endif |
| |
| SkImageCacherator* SkImageCacherator::NewFromGenerator(SkImageGenerator* gen, |
| const SkIRect* subset) { |
| if (!gen) { |
| return nullptr; |
| } |
| const SkImageInfo& info = gen->getInfo(); |
| if (info.isEmpty()) { |
| return nullptr; |
| } |
| |
| uint32_t uniqueID = gen->uniqueID(); |
| const SkIRect bounds = SkIRect::MakeWH(info.width(), info.height()); |
| if (subset) { |
| if (!bounds.contains(*subset)) { |
| return nullptr; |
| } |
| if (*subset != bounds) { |
| // we need a different uniqueID since we really are a subset of the raw generator |
| uniqueID = SkNextID::ImageID(); |
| } |
| } else { |
| subset = &bounds; |
| } |
| |
| return SkNEW_ARGS(SkImageCacherator, (gen, |
| gen->getInfo().makeWH(subset->width(), subset->height()), |
| SkIPoint::Make(subset->x(), subset->y()), |
| uniqueID)); |
| } |
| |
| SkImageCacherator::SkImageCacherator(SkImageGenerator* gen, const SkImageInfo& info, |
| const SkIPoint& origin, uint32_t uniqueID) |
| : fGenerator(gen) |
| , fInfo(info) |
| , fOrigin(origin) |
| , fUniqueID(uniqueID) |
| {} |
| |
| SkImageCacherator::~SkImageCacherator() { |
| SkDELETE(fGenerator); |
| } |
| |
| static bool check_output_bitmap(const SkBitmap& bitmap, uint32_t expectedID) { |
| SkASSERT(bitmap.getGenerationID() == expectedID); |
| SkASSERT(bitmap.isImmutable()); |
| SkASSERT(bitmap.getPixels()); |
| return true; |
| } |
| |
| static bool generate_bitmap(SkBitmap* bitmap, const SkImageInfo& info, const SkIPoint& origin, |
| SkImageGenerator* generator) { |
| const size_t rowBytes = info.minRowBytes(); |
| if (!bitmap->tryAllocPixels(info, rowBytes)) { |
| return false; |
| } |
| SkASSERT(bitmap->rowBytes() == rowBytes); |
| |
| const SkImageInfo& genInfo = generator->getInfo(); |
| if (info.dimensions() == genInfo.dimensions()) { |
| SkASSERT(origin.x() == 0 && origin.y() == 0); |
| // fast-case, no copy needed |
| if (!generator->getPixels(bitmap->info(), bitmap->getPixels(), rowBytes)) { |
| bitmap->reset(); |
| return false; |
| } |
| } else { |
| // need to handle subsetting |
| SkBitmap full; |
| if (!full.tryAllocPixels(genInfo)) { |
| return false; |
| } |
| if (!generator->getPixels(full.info(), full.getPixels(), full.rowBytes())) { |
| bitmap->reset(); |
| return false; |
| } |
| full.readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), |
| origin.x(), origin.y()); |
| } |
| return true; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkImageCacherator::tryLockAsBitmap(SkBitmap* bitmap) { |
| if (SkBitmapCache::Find(fUniqueID, bitmap)) { |
| return check_output_bitmap(*bitmap, fUniqueID); |
| } |
| if (!generate_bitmap(bitmap, fInfo, fOrigin, fGenerator)) { |
| return false; |
| } |
| |
| bitmap->pixelRef()->setImmutableWithID(fUniqueID); |
| SkBitmapCache::Add(fUniqueID, *bitmap); |
| return true; |
| } |
| |
| bool SkImageCacherator::lockAsBitmap(SkBitmap* bitmap) { |
| if (this->tryLockAsBitmap(bitmap)) { |
| return check_output_bitmap(*bitmap, fUniqueID); |
| } |
| |
| #if SK_SUPPORT_GPU |
| // Try to get a texture and read it back to raster (and then cache that with our ID) |
| |
| SkIRect subset = SkIRect::MakeXYWH(fOrigin.x(), fOrigin.y(), fInfo.width(), fInfo.height()); |
| SkAutoTUnref<GrTexture> tex(fGenerator->generateTexture(nullptr, kUntiled_SkImageUsageType, |
| &subset)); |
| if (!tex) { |
| bitmap->reset(); |
| return false; |
| } |
| |
| if (!bitmap->tryAllocPixels(fInfo)) { |
| bitmap->reset(); |
| return false; |
| } |
| |
| const uint32_t pixelOpsFlags = 0; |
| if (!tex->readPixels(0, 0, bitmap->width(), bitmap->height(), SkImageInfo2GrPixelConfig(fInfo), |
| bitmap->getPixels(), bitmap->rowBytes(), pixelOpsFlags)) { |
| bitmap->reset(); |
| return false; |
| } |
| |
| bitmap->pixelRef()->setImmutableWithID(fUniqueID); |
| SkBitmapCache::Add(fUniqueID, *bitmap); |
| return check_output_bitmap(*bitmap, fUniqueID); |
| #else |
| return false; |
| #endif |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| GrTexture* SkImageCacherator::tryLockAsTexture(GrContext* ctx, SkImageUsageType usage) { |
| #if SK_SUPPORT_GPU |
| GrUniqueKey key; |
| GrMakeKeyFromImageID(&key, fUniqueID, fInfo.width(), fInfo.height(), SkIPoint::Make(0, 0), |
| *ctx->caps(), usage); |
| GrTexture* tex = ctx->textureProvider()->findAndRefTextureByUniqueKey(key); |
| if (tex) { |
| return tex; // we got a cache hit! |
| } |
| |
| SkIRect subset = SkIRect::MakeXYWH(fOrigin.x(), fOrigin.y(), fInfo.width(), fInfo.height()); |
| tex = fGenerator->generateTexture(ctx, usage, &subset); |
| if (tex) { |
| tex->resourcePriv().setUniqueKey(key); |
| } |
| return tex; |
| #else |
| return nullptr; |
| #endif |
| } |
| |
| GrTexture* SkImageCacherator::lockAsTexture(GrContext* ctx, SkImageUsageType usage) { |
| #if SK_SUPPORT_GPU |
| if (!ctx) { |
| return nullptr; |
| } |
| if (GrTexture* tex = this->tryLockAsTexture(ctx, usage)) { |
| return tex; |
| } |
| |
| // Try to get a bitmap and then upload/cache it as a texture |
| |
| SkBitmap bitmap; |
| if (!generate_bitmap(&bitmap, fInfo, fOrigin, fGenerator)) { |
| return nullptr; |
| } |
| return GrRefCachedBitmapTexture(ctx, bitmap, usage); |
| #else |
| return nullptr; |
| #endif |
| } |
| |