| /* |
| * 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 "SkFlattenableBuffers.h" |
| #include "SkRect.h" |
| #include "SkValidationUtils.h" |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "GrTexture.h" |
| #include "SkImageFilterUtils.h" |
| #endif |
| |
| SK_DEFINE_INST_COUNT(SkImageFilter) |
| |
| SkImageFilter::SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect) |
| : fInputCount(inputCount), |
| fInputs(new SkImageFilter*[inputCount]), |
| fCropRect(cropRect ? *cropRect : CropRect(SkRect(), 0x0)) { |
| for (int i = 0; i < inputCount; ++i) { |
| fInputs[i] = inputs[i]; |
| SkSafeRef(fInputs[i]); |
| } |
| } |
| |
| SkImageFilter::SkImageFilter(SkImageFilter* input, const CropRect* cropRect) |
| : fInputCount(1), |
| fInputs(new SkImageFilter*[1]), |
| fCropRect(cropRect ? *cropRect : CropRect(SkRect(), 0x0)) { |
| fInputs[0] = input; |
| SkSafeRef(fInputs[0]); |
| } |
| |
| SkImageFilter::SkImageFilter(SkImageFilter* input1, SkImageFilter* input2, const CropRect* cropRect) |
| : fInputCount(2), fInputs(new SkImageFilter*[2]), |
| fCropRect(cropRect ? *cropRect : CropRect(SkRect(), 0x0)) { |
| fInputs[0] = input1; |
| fInputs[1] = input2; |
| SkSafeRef(fInputs[0]); |
| SkSafeRef(fInputs[1]); |
| } |
| |
| SkImageFilter::~SkImageFilter() { |
| for (int i = 0; i < fInputCount; i++) { |
| SkSafeUnref(fInputs[i]); |
| } |
| delete[] fInputs; |
| } |
| |
| SkImageFilter::SkImageFilter(SkFlattenableReadBuffer& buffer) |
| : fInputCount(buffer.readInt()), fInputs(new SkImageFilter*[fInputCount]) { |
| for (int i = 0; i < fInputCount; i++) { |
| if (buffer.readBool()) { |
| fInputs[i] = buffer.readImageFilter(); |
| } else { |
| fInputs[i] = NULL; |
| } |
| } |
| SkRect rect; |
| buffer.readRect(&rect); |
| uint32_t flags = buffer.readUInt(); |
| fCropRect = CropRect(rect, flags); |
| buffer.validate(SkIsValidRect(rect)); |
| } |
| |
| void SkImageFilter::flatten(SkFlattenableWriteBuffer& 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()); |
| } |
| |
| bool SkImageFilter::filterImage(Proxy* proxy, const SkBitmap& src, |
| const SkMatrix& ctm, |
| SkBitmap* result, SkIPoint* loc) { |
| SkASSERT(result); |
| SkASSERT(loc); |
| /* |
| * Give the proxy first shot at the filter. If it returns false, ask |
| * the filter to do it. |
| */ |
| return (proxy && proxy->filterImage(this, src, ctm, result, loc)) || |
| this->onFilterImage(proxy, src, ctm, result, loc); |
| } |
| |
| bool SkImageFilter::filterBounds(const SkIRect& src, const SkMatrix& ctm, |
| SkIRect* dst) { |
| SkASSERT(&src); |
| SkASSERT(dst); |
| return this->onFilterBounds(src, ctm, dst); |
| } |
| |
| bool SkImageFilter::onFilterImage(Proxy*, const SkBitmap&, const SkMatrix&, |
| SkBitmap*, SkIPoint*) { |
| return false; |
| } |
| |
| bool SkImageFilter::canFilterImageGPU() const { |
| return this->asNewEffect(NULL, NULL, SkMatrix::I(), SkIRect()); |
| } |
| |
| bool SkImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm, |
| SkBitmap* result, SkIPoint* offset) { |
| #if SK_SUPPORT_GPU |
| SkBitmap input; |
| SkASSERT(fInputCount == 1); |
| if (!SkImageFilterUtils::GetInputResultGPU(this->getInput(0), proxy, src, ctm, &input, offset)) { |
| return false; |
| } |
| GrTexture* srcTexture = input.getTexture(); |
| SkIRect bounds; |
| src.getBounds(&bounds); |
| if (!this->applyCropRect(&bounds, ctm)) { |
| 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); |
| GrContext::AutoMatrix am; |
| am.setIdentity(context); |
| GrContext::AutoRenderTarget art(context, dst.texture()->asRenderTarget()); |
| GrContext::AutoClip acs(context, dstRect); |
| GrEffectRef* effect; |
| SkMatrix matrix(ctm); |
| matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); |
| this->asNewEffect(&effect, srcTexture, matrix, bounds); |
| SkASSERT(effect); |
| SkAutoUnref effectRef(effect); |
| GrPaint paint; |
| paint.addColorEffect(effect); |
| context->drawRectToRect(paint, dstRect, srcRect); |
| |
| SkAutoTUnref<GrTexture> resultTex(dst.detach()); |
| SkImageFilterUtils::WrapTexture(resultTex, bounds.width(), bounds.height(), result); |
| offset->fX += bounds.left(); |
| offset->fY += bounds.top(); |
| return true; |
| #else |
| return false; |
| #endif |
| } |
| |
| bool SkImageFilter::applyCropRect(SkIRect* rect, const SkMatrix& matrix) const { |
| SkRect cropRect; |
| matrix.mapRect(&cropRect, fCropRect.rect()); |
| SkIRect cropRectI; |
| cropRect.roundOut(&cropRectI); |
| uint32_t flags = fCropRect.flags(); |
| // If the original crop rect edges were unset, max out the new crop edges |
| if (!(flags & CropRect::kHasLeft_CropEdge)) cropRectI.fLeft = SK_MinS32; |
| if (!(flags & CropRect::kHasTop_CropEdge)) cropRectI.fTop = SK_MinS32; |
| if (!(flags & CropRect::kHasRight_CropEdge)) cropRectI.fRight = SK_MaxS32; |
| if (!(flags & CropRect::kHasBottom_CropEdge)) cropRectI.fBottom = SK_MaxS32; |
| return rect->intersect(cropRectI); |
| } |
| |
| bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| SkIRect* dst) { |
| *dst = src; |
| return true; |
| } |
| |
| bool SkImageFilter::asNewEffect(GrEffectRef**, GrTexture*, const SkMatrix&, const SkIRect&) const { |
| return false; |
| } |
| |
| bool SkImageFilter::asColorFilter(SkColorFilter**) const { |
| return false; |
| } |