| /* |
| * Copyright 2012 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkImageFilter.h" |
| |
| #include "SkBitmap.h" |
| #include "SkChecksum.h" |
| #include "SkDevice.h" |
| #include "SkLazyPtr.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkRect.h" |
| #include "SkTDynamicHash.h" |
| #include "SkTInternalLList.h" |
| #include "SkValidationUtils.h" |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "SkGrPixelRef.h" |
| #include "SkGr.h" |
| #endif |
| |
| enum { kDefaultCacheSize = 128 * 1024 * 1024 }; |
| |
| static int32_t next_image_filter_unique_id() { |
| static int32_t gImageFilterUniqueID; |
| |
| // Never return 0. |
| int32_t id; |
| do { |
| id = sk_atomic_inc(&gImageFilterUniqueID) + 1; |
| } while (0 == id); |
| return id; |
| } |
| |
| struct SkImageFilter::Cache::Key { |
| Key(const uint32_t uniqueID, const SkMatrix& matrix, const SkIRect& clipBounds, uint32_t srcGenID) |
| : fUniqueID(uniqueID), fMatrix(matrix), fClipBounds(clipBounds), fSrcGenID(srcGenID) { |
| // Assert that Key is tightly-packed, since it is hashed. |
| SK_COMPILE_ASSERT(sizeof(Key) == sizeof(uint32_t) + sizeof(SkMatrix) + sizeof(SkIRect) + |
| sizeof(uint32_t), image_filter_key_tight_packing); |
| fMatrix.getType(); // force initialization of type, so hashes match |
| } |
| uint32_t fUniqueID; |
| SkMatrix fMatrix; |
| SkIRect fClipBounds; |
| uint32_t fSrcGenID; |
| bool operator==(const Key& other) const { |
| return fUniqueID == other.fUniqueID |
| && fMatrix == other.fMatrix |
| && fClipBounds == other.fClipBounds |
| && fSrcGenID == other.fSrcGenID; |
| } |
| }; |
| |
| SkImageFilter::Common::~Common() { |
| for (int i = 0; i < fInputs.count(); ++i) { |
| SkSafeUnref(fInputs[i]); |
| } |
| } |
| |
| void SkImageFilter::Common::allocInputs(int count) { |
| const size_t size = count * sizeof(SkImageFilter*); |
| fInputs.reset(count); |
| sk_bzero(fInputs.get(), size); |
| } |
| |
| void SkImageFilter::Common::detachInputs(SkImageFilter** inputs) { |
| const size_t size = fInputs.count() * sizeof(SkImageFilter*); |
| memcpy(inputs, fInputs.get(), size); |
| sk_bzero(fInputs.get(), size); |
| } |
| |
| bool SkImageFilter::Common::unflatten(SkReadBuffer& buffer, int expectedCount) { |
| const int count = buffer.readInt(); |
| if (!buffer.validate(count >= 0)) { |
| return false; |
| } |
| if (!buffer.validate(expectedCount < 0 || count == expectedCount)) { |
| return false; |
| } |
| |
| this->allocInputs(count); |
| for (int i = 0; i < count; i++) { |
| if (buffer.readBool()) { |
| fInputs[i] = buffer.readImageFilter(); |
| } |
| if (!buffer.isValid()) { |
| return false; |
| } |
| } |
| SkRect rect; |
| buffer.readRect(&rect); |
| if (!buffer.isValid() || !buffer.validate(SkIsValidRect(rect))) { |
| return false; |
| } |
| |
| uint32_t flags = buffer.readUInt(); |
| fCropRect = CropRect(rect, flags); |
| if (buffer.isVersionLT(SkReadBuffer::kImageFilterUniqueID_Version)) { |
| fUniqueID = next_image_filter_unique_id(); |
| } else { |
| fUniqueID = buffer.readUInt(); |
| } |
| return buffer.isValid(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkImageFilter::SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect, uint32_t uniqueID) |
| : fInputCount(inputCount), |
| fInputs(new SkImageFilter*[inputCount]), |
| fUsesSrcInput(false), |
| fCropRect(cropRect ? *cropRect : CropRect(SkRect(), 0x0)), |
| fUniqueID(uniqueID ? uniqueID : next_image_filter_unique_id()) { |
| for (int i = 0; i < inputCount; ++i) { |
| if (NULL == inputs[i] || inputs[i]->usesSrcInput()) { |
| fUsesSrcInput = true; |
| } |
| fInputs[i] = inputs[i]; |
| SkSafeRef(fInputs[i]); |
| } |
| } |
| |
| SkImageFilter::~SkImageFilter() { |
| for (int i = 0; i < fInputCount; i++) { |
| SkSafeUnref(fInputs[i]); |
| } |
| delete[] fInputs; |
| } |
| |
| SkImageFilter::SkImageFilter(int inputCount, SkReadBuffer& buffer) |
| : fUsesSrcInput(false) { |
| Common common; |
| if (common.unflatten(buffer, inputCount)) { |
| fCropRect = common.cropRect(); |
| fInputCount = common.inputCount(); |
| fInputs = SkNEW_ARRAY(SkImageFilter*, fInputCount); |
| common.detachInputs(fInputs); |
| for (int i = 0; i < fInputCount; ++i) { |
| if (NULL == fInputs[i] || fInputs[i]->usesSrcInput()) { |
| fUsesSrcInput = true; |
| } |
| } |
| fUniqueID = buffer.isCrossProcess() ? next_image_filter_unique_id() : common.uniqueID(); |
| } else { |
| fInputCount = 0; |
| fInputs = NULL; |
| } |
| } |
| |
| void SkImageFilter::flatten(SkWriteBuffer& buffer) const { |
| buffer.writeInt(fInputCount); |
| for (int i = 0; i < fInputCount; i++) { |
| SkImageFilter* input = getInput(i); |
| buffer.writeBool(input != NULL); |
| if (input != NULL) { |
| buffer.writeFlattenable(input); |
| } |
| } |
| buffer.writeRect(fCropRect.rect()); |
| buffer.writeUInt(fCropRect.flags()); |
| buffer.writeUInt(fUniqueID); |
| } |
| |
| bool SkImageFilter::filterImage(Proxy* proxy, const SkBitmap& src, |
| const Context& context, |
| SkBitmap* result, SkIPoint* offset) const { |
| SkASSERT(result); |
| SkASSERT(offset); |
| uint32_t srcGenID = fUsesSrcInput ? src.getGenerationID() : 0; |
| Cache::Key key(fUniqueID, context.ctm(), context.clipBounds(), srcGenID); |
| if (context.cache()) { |
| if (context.cache()->get(key, result, offset)) { |
| return true; |
| } |
| } |
| /* |
| * Give the proxy first shot at the filter. If it returns false, ask |
| * the filter to do it. |
| */ |
| if ((proxy && proxy->filterImage(this, src, context, result, offset)) || |
| this->onFilterImage(proxy, src, context, result, offset)) { |
| if (context.cache()) { |
| context.cache()->set(key, *result, *offset); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkImageFilter::filterBounds(const SkIRect& src, const SkMatrix& ctm, |
| SkIRect* dst) const { |
| SkASSERT(&src); |
| SkASSERT(dst); |
| return this->onFilterBounds(src, ctm, dst); |
| } |
| |
| void SkImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const { |
| if (0 == fInputCount) { |
| *dst = src; |
| return; |
| } |
| if (this->getInput(0)) { |
| this->getInput(0)->computeFastBounds(src, dst); |
| } else { |
| *dst = src; |
| } |
| for (int i = 1; i < fInputCount; i++) { |
| SkImageFilter* input = this->getInput(i); |
| if (input) { |
| SkRect bounds; |
| input->computeFastBounds(src, &bounds); |
| dst->join(bounds); |
| } else { |
| dst->join(src); |
| } |
| } |
| } |
| |
| bool SkImageFilter::onFilterImage(Proxy*, const SkBitmap&, const Context&, |
| SkBitmap*, SkIPoint*) const { |
| return false; |
| } |
| |
| bool SkImageFilter::canFilterImageGPU() const { |
| return this->asNewEffect(NULL, NULL, SkMatrix::I(), SkIRect()); |
| } |
| |
| bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx, |
| SkBitmap* result, SkIPoint* offset) const { |
| #if SK_SUPPORT_GPU |
| SkBitmap input = src; |
| SkASSERT(fInputCount == 1); |
| SkIPoint srcOffset = SkIPoint::Make(0, 0); |
| if (this->getInput(0) && |
| !this->getInput(0)->getInputResultGPU(proxy, src, ctx, &input, &srcOffset)) { |
| return false; |
| } |
| GrTexture* srcTexture = input.getTexture(); |
| SkIRect bounds; |
| if (!this->applyCropRect(ctx, proxy, input, &srcOffset, &bounds, &input)) { |
| return false; |
| } |
| SkRect srcRect = SkRect::Make(bounds); |
| SkRect dstRect = SkRect::MakeWH(srcRect.width(), srcRect.height()); |
| GrContext* context = srcTexture->getContext(); |
| |
| GrTextureDesc desc; |
| desc.fFlags = kRenderTarget_GrTextureFlagBit, |
| desc.fWidth = bounds.width(); |
| desc.fHeight = bounds.height(); |
| desc.fConfig = kRGBA_8888_GrPixelConfig; |
| |
| GrAutoScratchTexture dst(context, desc); |
| if (NULL == dst.texture()) { |
| return false; |
| } |
| GrContext::AutoMatrix am; |
| am.setIdentity(context); |
| GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget()); |
| GrContext::AutoClip acs(context, dstRect); |
| GrEffect* effect; |
| offset->fX = bounds.left(); |
| offset->fY = bounds.top(); |
| bounds.offset(-srcOffset); |
| SkMatrix matrix(ctx.ctm()); |
| matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); |
| this->asNewEffect(&effect, srcTexture, matrix, bounds); |
| SkASSERT(effect); |
| GrPaint paint; |
| paint.addColorEffect(effect)->unref(); |
| context->drawRectToRect(paint, dstRect, srcRect); |
| |
| SkAutoTUnref<GrTexture> resultTex(dst.detach()); |
| WrapTexture(resultTex, bounds.width(), bounds.height(), result); |
| return true; |
| #else |
| return false; |
| #endif |
| } |
| |
| bool SkImageFilter::applyCropRect(const Context& ctx, const SkBitmap& src, |
| const SkIPoint& srcOffset, SkIRect* bounds) const { |
| SkIRect srcBounds; |
| src.getBounds(&srcBounds); |
| srcBounds.offset(srcOffset); |
| SkRect cropRect; |
| ctx.ctm().mapRect(&cropRect, fCropRect.rect()); |
| SkIRect cropRectI; |
| cropRect.roundOut(&cropRectI); |
| uint32_t flags = fCropRect.flags(); |
| if (flags & CropRect::kHasLeft_CropEdge) srcBounds.fLeft = cropRectI.fLeft; |
| if (flags & CropRect::kHasTop_CropEdge) srcBounds.fTop = cropRectI.fTop; |
| if (flags & CropRect::kHasRight_CropEdge) srcBounds.fRight = cropRectI.fRight; |
| if (flags & CropRect::kHasBottom_CropEdge) srcBounds.fBottom = cropRectI.fBottom; |
| if (!srcBounds.intersect(ctx.clipBounds())) { |
| return false; |
| } |
| *bounds = srcBounds; |
| return true; |
| } |
| |
| bool SkImageFilter::applyCropRect(const Context& ctx, Proxy* proxy, const SkBitmap& src, |
| SkIPoint* srcOffset, SkIRect* bounds, SkBitmap* dst) const { |
| SkIRect srcBounds; |
| src.getBounds(&srcBounds); |
| srcBounds.offset(*srcOffset); |
| SkRect cropRect; |
| ctx.ctm().mapRect(&cropRect, fCropRect.rect()); |
| SkIRect cropRectI; |
| cropRect.roundOut(&cropRectI); |
| uint32_t flags = fCropRect.flags(); |
| *bounds = srcBounds; |
| if (flags & CropRect::kHasLeft_CropEdge) bounds->fLeft = cropRectI.fLeft; |
| if (flags & CropRect::kHasTop_CropEdge) bounds->fTop = cropRectI.fTop; |
| if (flags & CropRect::kHasRight_CropEdge) bounds->fRight = cropRectI.fRight; |
| if (flags & CropRect::kHasBottom_CropEdge) bounds->fBottom = cropRectI.fBottom; |
| if (!bounds->intersect(ctx.clipBounds())) { |
| return false; |
| } |
| if (srcBounds.contains(*bounds)) { |
| *dst = src; |
| return true; |
| } else { |
| SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds->width(), bounds->height())); |
| if (!device) { |
| return false; |
| } |
| SkCanvas canvas(device); |
| canvas.clear(0x00000000); |
| canvas.drawBitmap(src, srcOffset->x() - bounds->x(), srcOffset->y() - bounds->y()); |
| *srcOffset = SkIPoint::Make(bounds->x(), bounds->y()); |
| *dst = device->accessBitmap(false); |
| return true; |
| } |
| } |
| |
| bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| SkIRect* dst) const { |
| if (fInputCount < 1) { |
| return false; |
| } |
| |
| SkIRect bounds; |
| for (int i = 0; i < fInputCount; ++i) { |
| SkImageFilter* filter = this->getInput(i); |
| SkIRect rect = src; |
| if (filter && !filter->filterBounds(src, ctm, &rect)) { |
| return false; |
| } |
| if (0 == i) { |
| bounds = rect; |
| } else { |
| bounds.join(rect); |
| } |
| } |
| |
| // don't modify dst until now, so we don't accidentally change it in the |
| // loop, but then return false on the next filter. |
| *dst = bounds; |
| return true; |
| } |
| |
| bool SkImageFilter::asNewEffect(GrEffect**, GrTexture*, const SkMatrix&, const SkIRect&) const { |
| return false; |
| } |
| |
| bool SkImageFilter::asColorFilter(SkColorFilter**) const { |
| return false; |
| } |
| |
| #if SK_SUPPORT_GPU |
| |
| void SkImageFilter::WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result) { |
| SkImageInfo info = SkImageInfo::MakeN32Premul(width, height); |
| result->setInfo(info); |
| result->setPixelRef(SkNEW_ARGS(SkGrPixelRef, (info, texture)))->unref(); |
| } |
| |
| bool SkImageFilter::getInputResultGPU(SkImageFilter::Proxy* proxy, |
| const SkBitmap& src, const Context& ctx, |
| SkBitmap* result, SkIPoint* offset) const { |
| // Ensure that GrContext calls under filterImage and filterImageGPU below will see an identity |
| // matrix with no clip and that the matrix, clip, and render target set before this function was |
| // called are restored before we return to the caller. |
| GrContext* context = src.getTexture()->getContext(); |
| GrContext::AutoWideOpenIdentityDraw awoid(context, NULL); |
| if (this->canFilterImageGPU()) { |
| return this->filterImageGPU(proxy, src, ctx, result, offset); |
| } else { |
| if (this->filterImage(proxy, src, ctx, result, offset)) { |
| if (!result->getTexture()) { |
| const SkImageInfo info = result->info(); |
| if (kUnknown_SkColorType == info.colorType()) { |
| return false; |
| } |
| GrTexture* resultTex = GrLockAndRefCachedBitmapTexture(context, *result, NULL); |
| result->setPixelRef(new SkGrPixelRef(info, resultTex))->unref(); |
| GrUnlockAndUnrefCachedBitmapTexture(resultTex); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } |
| #endif |
| |
| namespace { |
| |
| class CacheImpl : public SkImageFilter::Cache { |
| public: |
| CacheImpl(size_t maxBytes) : fMaxBytes(maxBytes), fCurrentBytes(0) { |
| } |
| virtual ~CacheImpl() { |
| SkTDynamicHash<Value, Key>::Iter iter(&fLookup); |
| |
| while (!iter.done()) { |
| Value* v = &*iter; |
| ++iter; |
| delete v; |
| } |
| } |
| struct Value { |
| Value(const Key& key, const SkBitmap& bitmap, const SkIPoint& offset) |
| : fKey(key), fBitmap(bitmap), fOffset(offset) {} |
| Key fKey; |
| SkBitmap fBitmap; |
| SkIPoint fOffset; |
| static const Key& GetKey(const Value& v) { |
| return v.fKey; |
| } |
| static uint32_t Hash(const Key& key) { |
| return SkChecksum::Murmur3(reinterpret_cast<const uint32_t*>(&key), sizeof(Key)); |
| } |
| SK_DECLARE_INTERNAL_LLIST_INTERFACE(Value); |
| }; |
| virtual bool get(const Key& key, SkBitmap* result, SkIPoint* offset) const { |
| SkAutoMutexAcquire mutex(fMutex); |
| if (Value* v = fLookup.find(key)) { |
| *result = v->fBitmap; |
| *offset = v->fOffset; |
| if (v != fLRU.head()) { |
| fLRU.remove(v); |
| fLRU.addToHead(v); |
| } |
| return true; |
| } |
| return false; |
| } |
| virtual void set(const Key& key, const SkBitmap& result, const SkIPoint& offset) { |
| SkAutoMutexAcquire mutex(fMutex); |
| if (Value* v = fLookup.find(key)) { |
| removeInternal(v); |
| } |
| Value* v = new Value(key, result, offset); |
| fLookup.add(v); |
| fLRU.addToHead(v); |
| fCurrentBytes += result.getSize(); |
| while (fCurrentBytes > fMaxBytes) { |
| Value* tail = fLRU.tail(); |
| SkASSERT(tail); |
| if (tail == v) { |
| break; |
| } |
| removeInternal(tail); |
| } |
| } |
| private: |
| void removeInternal(Value* v) { |
| fCurrentBytes -= v->fBitmap.getSize(); |
| fLRU.remove(v); |
| fLookup.remove(v->fKey); |
| delete v; |
| } |
| private: |
| SkTDynamicHash<Value, Key> fLookup; |
| mutable SkTInternalLList<Value> fLRU; |
| size_t fMaxBytes; |
| size_t fCurrentBytes; |
| mutable SkMutex fMutex; |
| }; |
| |
| SkImageFilter::Cache* CreateCache() { |
| return SkImageFilter::Cache::Create(kDefaultCacheSize); |
| } |
| |
| } // namespace |
| |
| SkImageFilter::Cache* SkImageFilter::Cache::Create(size_t maxBytes) { |
| return SkNEW_ARGS(CacheImpl, (maxBytes)); |
| } |
| |
| SkImageFilter::Cache* SkImageFilter::Cache::Get() { |
| SK_DECLARE_STATIC_LAZY_PTR(SkImageFilter::Cache, cache, CreateCache); |
| return cache.get(); |
| } |
