| /* |
| * 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. |
| * |
| * 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 "config.h" |
| #include "FEComposite.h" |
| |
| #include "FECompositeArithmeticNEON.h" |
| #include "Filter.h" |
| #include "GraphicsContext.h" |
| #include <JavaScriptCore/Uint8ClampedArray.h> |
| #include <wtf/text/TextStream.h> |
| |
| namespace WebCore { |
| |
| 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) |
| { |
| } |
| |
| Ref<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)); |
| } |
| |
| bool FEComposite::setOperation(CompositeOperationType type) |
| { |
| if (m_type == type) |
| return false; |
| m_type = type; |
| return true; |
| } |
| |
| bool FEComposite::setK1(float k1) |
| { |
| if (m_k1 == k1) |
| return false; |
| m_k1 = k1; |
| return true; |
| } |
| |
| bool FEComposite::setK2(float k2) |
| { |
| if (m_k2 == k2) |
| return false; |
| m_k2 = k2; |
| return true; |
| } |
| |
| bool FEComposite::setK3(float k3) |
| { |
| if (m_k3 == k3) |
| return false; |
| m_k3 = k3; |
| return true; |
| } |
| |
| 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(); |
| } |
| |
| static unsigned char clampByte(int c) |
| { |
| unsigned char buff[] = { static_cast<unsigned char>(c), 255, 0 }; |
| unsigned uc = static_cast<unsigned>(c); |
| return buff[!!(uc & ~0xff) + !!(uc & ~(~0u >> 1))]; |
| } |
| |
| 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; |
| |
| *destination = clampByte(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; |
| } |
| } |
| |
| #if !HAVE(ARM_NEON_INTRINSICS) |
| 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); |
| } |
| } |
| #endif |
| |
| inline void FEComposite::platformArithmeticSoftware(const 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 |
| } |
| |
| void FEComposite::determineAbsolutePaintRect() |
| { |
| switch (m_type) { |
| case FECOMPOSITE_OPERATOR_IN: |
| case FECOMPOSITE_OPERATOR_ATOP: |
| // For In and Atop the first effect just influences the result of |
| // the second effect. So just use the absolute paint rect of the second effect here. |
| setAbsolutePaintRect(inputEffect(1)->absolutePaintRect()); |
| clipAbsolutePaintRect(); |
| return; |
| case FECOMPOSITE_OPERATOR_ARITHMETIC: |
| // Arithmetic may influnce the compele filter primitive region. So we can't |
| // optimize the paint region here. |
| setAbsolutePaintRect(enclosingIntRect(maxEffectRect())); |
| return; |
| default: |
| // Take the union of both input effects. |
| FilterEffect::determineAbsolutePaintRect(); |
| return; |
| } |
| } |
| |
| void FEComposite::platformApplySoftware() |
| { |
| 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()); |
| auto srcPixelArray = in->premultipliedResult(effectADrawingRect); |
| if (!srcPixelArray) |
| return; |
| |
| IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePaintRect()); |
| in2->copyPremultipliedResult(*dstPixelArray, effectBDrawingRect); |
| |
| platformArithmeticSoftware(*srcPixelArray, *dstPixelArray, m_k1, m_k2, m_k3, m_k4); |
| return; |
| } |
| |
| ImageBuffer* resultImage = createImageBufferResult(); |
| if (!resultImage) |
| return; |
| GraphicsContext& filterContext = resultImage->context(); |
| |
| ImageBuffer* imageBuffer = in->imageBufferResult(); |
| ImageBuffer* imageBuffer2 = in2->imageBufferResult(); |
| if (!imageBuffer || !imageBuffer2) |
| return; |
| |
| 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; |
| IntRect adjustedDestinationRect = destinationRect - absolutePaintRect().location(); |
| IntRect sourceRect = destinationRect - in->absolutePaintRect().location(); |
| IntRect source2Rect = destinationRect - in2->absolutePaintRect().location(); |
| filterContext.drawImageBuffer(*imageBuffer2, FloatRect(adjustedDestinationRect), FloatRect(source2Rect)); |
| filterContext.drawImageBuffer(*imageBuffer, FloatRect(adjustedDestinationRect), FloatRect(sourceRect), { CompositeSourceIn }); |
| break; |
| } |
| case FECOMPOSITE_OPERATOR_OUT: |
| filterContext.drawImageBuffer(*imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect())); |
| filterContext.drawImageBuffer(*imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect()), IntRect(IntPoint(), imageBuffer2->logicalSize()), CompositeDestinationOut); |
| break; |
| case FECOMPOSITE_OPERATOR_ATOP: |
| filterContext.drawImageBuffer(*imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect())); |
| filterContext.drawImageBuffer(*imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect()), IntRect(IntPoint(), imageBuffer->logicalSize()), CompositeSourceAtop); |
| break; |
| case FECOMPOSITE_OPERATOR_XOR: |
| filterContext.drawImageBuffer(*imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect())); |
| filterContext.drawImageBuffer(*imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect()), IntRect(IntPoint(), imageBuffer->logicalSize()), CompositeXOR); |
| break; |
| case FECOMPOSITE_OPERATOR_LIGHTER: |
| filterContext.drawImageBuffer(*imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect())); |
| filterContext.drawImageBuffer(*imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect()), IntRect(IntPoint(), imageBuffer->logicalSize()), CompositePlusLighter); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| 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; |
| case FECOMPOSITE_OPERATOR_LIGHTER: |
| ts << "LIGHTER"; |
| break; |
| } |
| return ts; |
| } |
| |
| TextStream& FEComposite::externalRepresentation(TextStream& ts, RepresentationType representation) const |
| { |
| ts << indent << "[feComposite"; |
| FilterEffect::externalRepresentation(ts, representation); |
| 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"; |
| |
| TextStream::IndentScope indentScope(ts); |
| inputEffect(0)->externalRepresentation(ts, representation); |
| inputEffect(1)->externalRepresentation(ts, representation); |
| return ts; |
| } |
| |
| } // namespace WebCore |
