| /* |
| * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org> |
| * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org> |
| * Copyright (C) 2005 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2009 Dirk Schulze <krit@webkit.org> |
| * Copyright (C) Research In Motion Limited 2010. All rights reserved. |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| |
| #include "sky/engine/platform/graphics/filters/FEComposite.h" |
| |
| #include "third_party/skia/include/effects/SkArithmeticMode.h" |
| #include "third_party/skia/include/effects/SkXfermodeImageFilter.h" |
| |
| #include "sky/engine/platform/graphics/GraphicsContext.h" |
| #include "sky/engine/platform/graphics/cpu/arm/filters/FECompositeArithmeticNEON.h" |
| #include "sky/engine/platform/graphics/filters/SkiaImageFilterBuilder.h" |
| #include "sky/engine/platform/text/TextStream.h" |
| #include "third_party/skia/include/core/SkDevice.h" |
| |
| #include "sky/engine/wtf/Uint8ClampedArray.h" |
| |
| namespace blink { |
| |
| FEComposite::FEComposite(Filter* filter, const CompositeOperationType& type, float k1, float k2, float k3, float k4) |
| : FilterEffect(filter) |
| , m_type(type) |
| , m_k1(k1) |
| , m_k2(k2) |
| , m_k3(k3) |
| , m_k4(k4) |
| { |
| } |
| |
| PassRefPtr<FEComposite> FEComposite::create(Filter* filter, const CompositeOperationType& type, float k1, float k2, float k3, float k4) |
| { |
| return adoptRef(new FEComposite(filter, type, k1, k2, k3, k4)); |
| } |
| |
| CompositeOperationType FEComposite::operation() const |
| { |
| return m_type; |
| } |
| |
| bool FEComposite::setOperation(CompositeOperationType type) |
| { |
| if (m_type == type) |
| return false; |
| m_type = type; |
| return true; |
| } |
| |
| float FEComposite::k1() const |
| { |
| return m_k1; |
| } |
| |
| bool FEComposite::setK1(float k1) |
| { |
| if (m_k1 == k1) |
| return false; |
| m_k1 = k1; |
| return true; |
| } |
| |
| float FEComposite::k2() const |
| { |
| return m_k2; |
| } |
| |
| bool FEComposite::setK2(float k2) |
| { |
| if (m_k2 == k2) |
| return false; |
| m_k2 = k2; |
| return true; |
| } |
| |
| float FEComposite::k3() const |
| { |
| return m_k3; |
| } |
| |
| bool FEComposite::setK3(float k3) |
| { |
| if (m_k3 == k3) |
| return false; |
| m_k3 = k3; |
| return true; |
| } |
| |
| float FEComposite::k4() const |
| { |
| return m_k4; |
| } |
| |
| bool FEComposite::setK4(float k4) |
| { |
| if (m_k4 == k4) |
| return false; |
| m_k4 = k4; |
| return true; |
| } |
| |
| void FEComposite::correctFilterResultIfNeeded() |
| { |
| if (m_type != FECOMPOSITE_OPERATOR_ARITHMETIC) |
| return; |
| |
| forceValidPreMultipliedPixels(); |
| } |
| |
| template <int b1, int b4> |
| static inline void computeArithmeticPixels(unsigned char* source, unsigned char* destination, int pixelArrayLength, |
| float k1, float k2, float k3, float k4) |
| { |
| float scaledK1; |
| float scaledK4; |
| if (b1) |
| scaledK1 = k1 / 255.0f; |
| if (b4) |
| scaledK4 = k4 * 255.0f; |
| |
| while (--pixelArrayLength >= 0) { |
| unsigned char i1 = *source; |
| unsigned char i2 = *destination; |
| float result = k2 * i1 + k3 * i2; |
| if (b1) |
| result += scaledK1 * i1 * i2; |
| if (b4) |
| result += scaledK4; |
| |
| if (result <= 0) |
| *destination = 0; |
| else if (result >= 255) |
| *destination = 255; |
| else |
| *destination = result; |
| ++source; |
| ++destination; |
| } |
| } |
| |
| // computeArithmeticPixelsUnclamped is a faster version of computeArithmeticPixels for the common case where clamping |
| // is not necessary. This enables aggresive compiler optimizations such as auto-vectorization. |
| template <int b1, int b4> |
| static inline void computeArithmeticPixelsUnclamped(unsigned char* source, unsigned char* destination, int pixelArrayLength, float k1, float k2, float k3, float k4) |
| { |
| float scaledK1; |
| float scaledK4; |
| if (b1) |
| scaledK1 = k1 / 255.0f; |
| if (b4) |
| scaledK4 = k4 * 255.0f; |
| |
| while (--pixelArrayLength >= 0) { |
| unsigned char i1 = *source; |
| unsigned char i2 = *destination; |
| float result = k2 * i1 + k3 * i2; |
| if (b1) |
| result += scaledK1 * i1 * i2; |
| if (b4) |
| result += scaledK4; |
| |
| *destination = result; |
| ++source; |
| ++destination; |
| } |
| } |
| |
| static inline void arithmeticSoftware(unsigned char* source, unsigned char* destination, int pixelArrayLength, float k1, float k2, float k3, float k4) |
| { |
| float upperLimit = std::max(0.0f, k1) + std::max(0.0f, k2) + std::max(0.0f, k3) + k4; |
| float lowerLimit = std::min(0.0f, k1) + std::min(0.0f, k2) + std::min(0.0f, k3) + k4; |
| if ((k4 >= 0.0f && k4 <= 1.0f) && (upperLimit >= 0.0f && upperLimit <= 1.0f) && (lowerLimit >= 0.0f && lowerLimit <= 1.0f)) { |
| if (k4) { |
| if (k1) |
| computeArithmeticPixelsUnclamped<1, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| else |
| computeArithmeticPixelsUnclamped<0, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| } else { |
| if (k1) |
| computeArithmeticPixelsUnclamped<1, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| else |
| computeArithmeticPixelsUnclamped<0, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| } |
| return; |
| } |
| |
| if (k4) { |
| if (k1) |
| computeArithmeticPixels<1, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| else |
| computeArithmeticPixels<0, 1>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| } else { |
| if (k1) |
| computeArithmeticPixels<1, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| else |
| computeArithmeticPixels<0, 0>(source, destination, pixelArrayLength, k1, k2, k3, k4); |
| } |
| } |
| |
| inline void FEComposite::platformArithmeticSoftware(Uint8ClampedArray* source, Uint8ClampedArray* destination, |
| float k1, float k2, float k3, float k4) |
| { |
| int length = source->length(); |
| ASSERT(length == static_cast<int>(destination->length())); |
| // The selection here eventually should happen dynamically. |
| #if HAVE(ARM_NEON_INTRINSICS) |
| ASSERT(!(length & 0x3)); |
| platformArithmeticNeon(source->data(), destination->data(), length, k1, k2, k3, k4); |
| #else |
| arithmeticSoftware(source->data(), destination->data(), length, k1, k2, k3, k4); |
| #endif |
| } |
| |
| FloatRect FEComposite::determineAbsolutePaintRect(const FloatRect& originalRequestedRect) |
| { |
| FloatRect requestedRect = originalRequestedRect; |
| if (clipsToBounds()) |
| requestedRect.intersect(maxEffectRect()); |
| |
| // We may be called multiple times if result is used more than once. Return |
| // quickly if nothing new is required. |
| if (absolutePaintRect().contains(enclosingIntRect(requestedRect))) |
| return requestedRect; |
| |
| // No mapPaintRect required for FEComposite. |
| FloatRect input1Rect = inputEffect(1)->determineAbsolutePaintRect(requestedRect); |
| FloatRect affectedRect; |
| switch (m_type) { |
| case FECOMPOSITE_OPERATOR_IN: |
| // 'in' has output only in the intersection of both inputs. |
| affectedRect = intersection(input1Rect, inputEffect(0)->determineAbsolutePaintRect(input1Rect)); |
| break; |
| case FECOMPOSITE_OPERATOR_ATOP: |
| // 'atop' has output only in the extents of the second input. |
| // Make sure first input knows where it needs to produce output. |
| inputEffect(0)->determineAbsolutePaintRect(input1Rect); |
| affectedRect = input1Rect; |
| break; |
| case FECOMPOSITE_OPERATOR_ARITHMETIC: |
| if (k4() > 0) { |
| // Make sure first input knows where it needs to produce output. |
| inputEffect(0)->determineAbsolutePaintRect(requestedRect); |
| // Arithmetic with non-zero k4 may influnce the complete filter primitive |
| // region. So we can't optimize the paint region here. |
| affectedRect = requestedRect; |
| break; |
| } |
| if (k2() <= 0) { |
| // Input 0 does not appear where input 1 is not present. |
| FloatRect input0Rect = inputEffect(0)->determineAbsolutePaintRect(input1Rect); |
| if (k3() > 0) { |
| affectedRect = input1Rect; |
| } else { |
| // Just k1 is positive. Use intersection. |
| affectedRect = intersection(input1Rect, input0Rect); |
| } |
| break; |
| } |
| // else fall through to use union |
| default: |
| // Take the union of both input effects. |
| affectedRect = unionRect(input1Rect, inputEffect(0)->determineAbsolutePaintRect(requestedRect)); |
| break; |
| } |
| |
| affectedRect.intersect(requestedRect); |
| addAbsolutePaintRect(affectedRect); |
| return affectedRect; |
| } |
| |
| void FEComposite::applySoftware() |
| { |
| FilterEffect* in = inputEffect(0); |
| FilterEffect* in2 = inputEffect(1); |
| |
| if (m_type == FECOMPOSITE_OPERATOR_ARITHMETIC) { |
| Uint8ClampedArray* dstPixelArray = createPremultipliedImageResult(); |
| if (!dstPixelArray) |
| return; |
| |
| IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect()); |
| RefPtr<Uint8ClampedArray> srcPixelArray = in->asPremultipliedImage(effectADrawingRect); |
| |
| IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePaintRect()); |
| in2->copyPremultipliedImage(dstPixelArray, effectBDrawingRect); |
| |
| platformArithmeticSoftware(srcPixelArray.get(), dstPixelArray, m_k1, m_k2, m_k3, m_k4); |
| return; |
| } |
| |
| ImageBuffer* resultImage = createImageBufferResult(); |
| if (!resultImage) |
| return; |
| GraphicsContext* filterContext = resultImage->context(); |
| |
| ImageBuffer* imageBuffer = in->asImageBuffer(); |
| ImageBuffer* imageBuffer2 = in2->asImageBuffer(); |
| ASSERT(imageBuffer); |
| ASSERT(imageBuffer2); |
| |
| switch (m_type) { |
| case FECOMPOSITE_OPERATOR_OVER: |
| filterContext->drawImageBuffer(imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect())); |
| filterContext->drawImageBuffer(imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect())); |
| break; |
| case FECOMPOSITE_OPERATOR_IN: { |
| // Applies only to the intersected region. |
| IntRect destinationRect = in->absolutePaintRect(); |
| destinationRect.intersect(in2->absolutePaintRect()); |
| destinationRect.intersect(absolutePaintRect()); |
| if (destinationRect.isEmpty()) |
| break; |
| FloatRect sourceRect(IntPoint(destinationRect.x() - in->absolutePaintRect().x(), |
| destinationRect.y() - in->absolutePaintRect().y()), destinationRect.size()); |
| FloatRect source2Rect(IntPoint(destinationRect.x() - in2->absolutePaintRect().x(), |
| destinationRect.y() - in2->absolutePaintRect().y()), destinationRect.size()); |
| destinationRect.move(-absolutePaintRect().x(), -absolutePaintRect().y()); |
| filterContext->drawImageBuffer(imageBuffer2, destinationRect, &source2Rect); |
| filterContext->drawImageBuffer(imageBuffer, destinationRect, &sourceRect, CompositeSourceIn); |
| break; |
| } |
| case FECOMPOSITE_OPERATOR_OUT: |
| filterContext->drawImageBuffer(imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect())); |
| filterContext->drawImageBuffer(imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect()), 0, CompositeDestinationOut); |
| break; |
| case FECOMPOSITE_OPERATOR_ATOP: |
| filterContext->drawImageBuffer(imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect())); |
| filterContext->drawImageBuffer(imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect()), 0, CompositeSourceAtop); |
| break; |
| case FECOMPOSITE_OPERATOR_XOR: |
| filterContext->drawImageBuffer(imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect())); |
| filterContext->drawImageBuffer(imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect()), 0, CompositeXOR); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| SkXfermode::Mode toXfermode(CompositeOperationType mode) |
| { |
| switch (mode) { |
| case FECOMPOSITE_OPERATOR_OVER: |
| return SkXfermode::kSrcOver_Mode; |
| case FECOMPOSITE_OPERATOR_IN: |
| return SkXfermode::kSrcIn_Mode; |
| case FECOMPOSITE_OPERATOR_OUT: |
| return SkXfermode::kSrcOut_Mode; |
| case FECOMPOSITE_OPERATOR_ATOP: |
| return SkXfermode::kSrcATop_Mode; |
| case FECOMPOSITE_OPERATOR_XOR: |
| return SkXfermode::kXor_Mode; |
| default: |
| ASSERT_NOT_REACHED(); |
| return SkXfermode::kSrcOver_Mode; |
| } |
| } |
| |
| PassRefPtr<SkImageFilter> FEComposite::createImageFilter(SkiaImageFilterBuilder* builder) |
| { |
| return createImageFilterInternal(builder, true); |
| } |
| |
| PassRefPtr<SkImageFilter> FEComposite::createImageFilterWithoutValidation(SkiaImageFilterBuilder* builder) |
| { |
| return createImageFilterInternal(builder, false); |
| } |
| |
| PassRefPtr<SkImageFilter> FEComposite::createImageFilterInternal(SkiaImageFilterBuilder* builder, bool requiresPMColorValidation) |
| { |
| RefPtr<SkImageFilter> foreground(builder->build(inputEffect(0), operatingColorSpace(), !mayProduceInvalidPreMultipliedPixels())); |
| RefPtr<SkImageFilter> background(builder->build(inputEffect(1), operatingColorSpace(), !mayProduceInvalidPreMultipliedPixels())); |
| SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset()); |
| RefPtr<SkXfermode> mode; |
| if (m_type == FECOMPOSITE_OPERATOR_ARITHMETIC) |
| mode = adoptRef(SkArithmeticMode::Create(SkFloatToScalar(m_k1), SkFloatToScalar(m_k2), SkFloatToScalar(m_k3), SkFloatToScalar(m_k4), requiresPMColorValidation)); |
| else |
| mode = adoptRef(SkXfermode::Create(toXfermode(m_type))); |
| return adoptRef(SkXfermodeImageFilter::Create(mode.get(), background.get(), foreground.get(), &cropRect)); |
| } |
| |
| static TextStream& operator<<(TextStream& ts, const CompositeOperationType& type) |
| { |
| switch (type) { |
| case FECOMPOSITE_OPERATOR_UNKNOWN: |
| ts << "UNKNOWN"; |
| break; |
| case FECOMPOSITE_OPERATOR_OVER: |
| ts << "OVER"; |
| break; |
| case FECOMPOSITE_OPERATOR_IN: |
| ts << "IN"; |
| break; |
| case FECOMPOSITE_OPERATOR_OUT: |
| ts << "OUT"; |
| break; |
| case FECOMPOSITE_OPERATOR_ATOP: |
| ts << "ATOP"; |
| break; |
| case FECOMPOSITE_OPERATOR_XOR: |
| ts << "XOR"; |
| break; |
| case FECOMPOSITE_OPERATOR_ARITHMETIC: |
| ts << "ARITHMETIC"; |
| break; |
| } |
| return ts; |
| } |
| |
| TextStream& FEComposite::externalRepresentation(TextStream& ts, int indent) const |
| { |
| writeIndent(ts, indent); |
| ts << "[feComposite"; |
| FilterEffect::externalRepresentation(ts); |
| ts << " operation=\"" << m_type << "\""; |
| if (m_type == FECOMPOSITE_OPERATOR_ARITHMETIC) |
| ts << " k1=\"" << m_k1 << "\" k2=\"" << m_k2 << "\" k3=\"" << m_k3 << "\" k4=\"" << m_k4 << "\""; |
| ts << "]\n"; |
| inputEffect(0)->externalRepresentation(ts, indent + 1); |
| inputEffect(1)->externalRepresentation(ts, indent + 1); |
| return ts; |
| } |
| |
| } // namespace blink |
