| /* |
| * 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 "SkMergeImageFilter.h" |
| #include "SkCanvas.h" |
| #include "SkDevice.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkValidationUtils.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkMergeImageFilter::initAllocModes() { |
| int inputCount = countInputs(); |
| if (inputCount) { |
| size_t size = sizeof(uint8_t) * inputCount; |
| if (size <= sizeof(fStorage)) { |
| fModes = SkTCast<uint8_t*>(fStorage); |
| } else { |
| fModes = SkTCast<uint8_t*>(sk_malloc_throw(size)); |
| } |
| } else { |
| fModes = NULL; |
| } |
| } |
| |
| void SkMergeImageFilter::initModes(const SkXfermode::Mode modes[]) { |
| if (modes) { |
| this->initAllocModes(); |
| int inputCount = countInputs(); |
| for (int i = 0; i < inputCount; ++i) { |
| fModes[i] = SkToU8(modes[i]); |
| } |
| } else { |
| fModes = NULL; |
| } |
| } |
| |
| SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* filters[], int count, |
| const SkXfermode::Mode modes[], |
| const CropRect* cropRect) |
| : INHERITED(count, filters, cropRect) { |
| SkASSERT(count >= 0); |
| this->initModes(modes); |
| } |
| |
| SkMergeImageFilter::~SkMergeImageFilter() { |
| |
| if (fModes != SkTCast<uint8_t*>(fStorage)) { |
| sk_free(fModes); |
| } |
| } |
| |
| bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, |
| const Context& ctx, |
| SkBitmap* result, SkIPoint* offset) const { |
| if (countInputs() < 1) { |
| return false; |
| } |
| |
| SkIRect bounds; |
| if (!this->applyCropRect(ctx, src, SkIPoint::Make(0, 0), &bounds)) { |
| return false; |
| } |
| |
| const int x0 = bounds.left(); |
| const int y0 = bounds.top(); |
| |
| SkAutoTUnref<SkBaseDevice> dst(proxy->createDevice(bounds.width(), bounds.height())); |
| if (NULL == dst) { |
| return false; |
| } |
| SkCanvas canvas(dst); |
| SkPaint paint; |
| |
| int inputCount = countInputs(); |
| for (int i = 0; i < inputCount; ++i) { |
| SkBitmap tmp; |
| const SkBitmap* srcPtr; |
| SkIPoint pos = SkIPoint::Make(0, 0); |
| SkImageFilter* filter = getInput(i); |
| if (filter) { |
| if (!filter->filterImage(proxy, src, ctx, &tmp, &pos)) { |
| return false; |
| } |
| srcPtr = &tmp; |
| } else { |
| srcPtr = &src; |
| } |
| |
| if (fModes) { |
| paint.setXfermodeMode((SkXfermode::Mode)fModes[i]); |
| } else { |
| paint.setXfermode(NULL); |
| } |
| canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint); |
| } |
| |
| offset->fX = bounds.left(); |
| offset->fY = bounds.top(); |
| *result = dst->accessBitmap(false); |
| return true; |
| } |
| |
| SkFlattenable* SkMergeImageFilter::CreateProc(SkReadBuffer& buffer) { |
| Common common; |
| if (!common.unflatten(buffer, -1)) { |
| return NULL; |
| } |
| |
| const int count = common.inputCount(); |
| bool hasModes = buffer.readBool(); |
| if (hasModes) { |
| SkAutoSTArray<4, SkXfermode::Mode> modes(count); |
| SkAutoSTArray<4, uint8_t> modes8(count); |
| if (!buffer.readByteArray(modes8.get(), count)) { |
| return NULL; |
| } |
| for (int i = 0; i < count; ++i) { |
| modes[i] = (SkXfermode::Mode)modes8[i]; |
| buffer.validate(SkIsValidMode(modes[i])); |
| } |
| if (!buffer.isValid()) { |
| return NULL; |
| } |
| return Create(common.inputs(), count, modes.get(), &common.cropRect()); |
| } |
| return Create(common.inputs(), count, NULL, &common.cropRect()); |
| } |
| |
| void SkMergeImageFilter::flatten(SkWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeBool(fModes != NULL); |
| if (fModes) { |
| buffer.writeByteArray(fModes, countInputs() * sizeof(fModes[0])); |
| } |
| } |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkMergeImageFilter::toString(SkString* str) const { |
| str->appendf("SkMergeImageFilter: ("); |
| |
| for (int i = 0; i < this->countInputs(); ++i) { |
| SkImageFilter* filter = this->getInput(i); |
| str->appendf("%d: (", i); |
| filter->toString(str); |
| str->appendf(")"); |
| } |
| |
| str->append(")"); |
| } |
| #endif |