| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include "config.h" |
| |
| #include "SkiaImageFilterBuilder.h" |
| |
| #include "FilterEffect.h" |
| #include "FilterOperations.h" |
| #include "SkBlurImageFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkMatrix.h" |
| |
| namespace { |
| |
| void getBrightnessMatrix(float amount, SkScalar matrix[20]) |
| { |
| memset(matrix, 0, 20 * sizeof(SkScalar)); |
| matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1; |
| matrix[4] = matrix[9] = matrix[14] = amount * 255; |
| } |
| |
| void getContrastMatrix(float amount, SkScalar matrix[20]) |
| { |
| memset(matrix, 0, 20 * sizeof(SkScalar)); |
| matrix[0] = matrix[6] = matrix[12] = amount; |
| matrix[4] = matrix[9] = matrix[14] = (-0.5f * amount + 0.5f) * 255; |
| matrix[18] = 1; |
| } |
| |
| void getSaturateMatrix(float amount, SkScalar matrix[20]) |
| { |
| // Note, these values are computed to ensure matrixNeedsClamping is false |
| // for amount in [0..1] |
| matrix[0] = 0.213f + 0.787f * amount; |
| matrix[1] = 0.715f - 0.715f * amount; |
| matrix[2] = 1.f - (matrix[0] + matrix[1]); |
| matrix[3] = matrix[4] = 0; |
| matrix[5] = 0.213f - 0.213f * amount; |
| matrix[6] = 0.715f + 0.285f * amount; |
| matrix[7] = 1.f - (matrix[5] + matrix[6]); |
| matrix[8] = matrix[9] = 0; |
| matrix[10] = 0.213f - 0.213f * amount; |
| matrix[11] = 0.715f - 0.715f * amount; |
| matrix[12] = 1.f - (matrix[10] + matrix[11]); |
| matrix[13] = matrix[14] = 0; |
| matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0; |
| matrix[18] = 1; |
| } |
| |
| void getHueRotateMatrix(float hue, SkScalar matrix[20]) |
| { |
| float cosHue = cosf(hue * piFloat / 180); |
| float sinHue = sinf(hue * piFloat / 180); |
| matrix[0] = 0.213f + cosHue * 0.787f - sinHue * 0.213f; |
| matrix[1] = 0.715f - cosHue * 0.715f - sinHue * 0.715f; |
| matrix[2] = 0.072f - cosHue * 0.072f + sinHue * 0.928f; |
| matrix[3] = matrix[4] = 0; |
| matrix[5] = 0.213f - cosHue * 0.213f + sinHue * 0.143f; |
| matrix[6] = 0.715f + cosHue * 0.285f + sinHue * 0.140f; |
| matrix[7] = 0.072f - cosHue * 0.072f - sinHue * 0.283f; |
| matrix[8] = matrix[9] = 0; |
| matrix[10] = 0.213f - cosHue * 0.213f - sinHue * 0.787f; |
| matrix[11] = 0.715f - cosHue * 0.715f + sinHue * 0.715f; |
| matrix[12] = 0.072f + cosHue * 0.928f + sinHue * 0.072f; |
| matrix[13] = matrix[14] = 0; |
| matrix[15] = matrix[16] = matrix[17] = 0; |
| matrix[18] = 1; |
| matrix[19] = 0; |
| } |
| |
| void getInvertMatrix(float amount, SkScalar matrix[20]) |
| { |
| memset(matrix, 0, 20 * sizeof(SkScalar)); |
| matrix[0] = matrix[6] = matrix[12] = 1 - 2 * amount; |
| matrix[4] = matrix[9] = matrix[14] = amount * 255; |
| matrix[18] = 1; |
| } |
| |
| void getOpacityMatrix(float amount, SkScalar matrix[20]) |
| { |
| memset(matrix, 0, 20 * sizeof(SkScalar)); |
| matrix[0] = matrix[6] = matrix[12] = 1; |
| matrix[18] = amount; |
| } |
| |
| void getGrayscaleMatrix(float amount, SkScalar matrix[20]) |
| { |
| // Note, these values are computed to ensure matrixNeedsClamping is false |
| // for amount in [0..1] |
| matrix[0] = 0.2126f + 0.7874f * amount; |
| matrix[1] = 0.7152f - 0.7152f * amount; |
| matrix[2] = 1.f - (matrix[0] + matrix[1]); |
| matrix[3] = matrix[4] = 0; |
| |
| matrix[5] = 0.2126f - 0.2126f * amount; |
| matrix[6] = 0.7152f + 0.2848f * amount; |
| matrix[7] = 1.f - (matrix[5] + matrix[6]); |
| matrix[8] = matrix[9] = 0; |
| |
| matrix[10] = 0.2126f - 0.2126f * amount; |
| matrix[11] = 0.7152f - 0.7152f * amount; |
| matrix[12] = 1.f - (matrix[10] + matrix[11]); |
| matrix[13] = matrix[14] = 0; |
| |
| matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0; |
| matrix[18] = 1; |
| } |
| |
| void getSepiaMatrix(float amount, SkScalar matrix[20]) |
| { |
| matrix[0] = 0.393f + 0.607f * amount; |
| matrix[1] = 0.769f - 0.769f * amount; |
| matrix[2] = 0.189f - 0.189f * amount; |
| matrix[3] = matrix[4] = 0; |
| |
| matrix[5] = 0.349f - 0.349f * amount; |
| matrix[6] = 0.686f + 0.314f * amount; |
| matrix[7] = 0.168f - 0.168f * amount; |
| matrix[8] = matrix[9] = 0; |
| |
| matrix[10] = 0.272f - 0.272f * amount; |
| matrix[11] = 0.534f - 0.534f * amount; |
| matrix[12] = 0.131f + 0.869f * amount; |
| matrix[13] = matrix[14] = 0; |
| |
| matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0; |
| matrix[18] = 1; |
| } |
| |
| SkImageFilter* createMatrixImageFilter(SkScalar matrix[20], SkImageFilter* input) |
| { |
| SkAutoTUnref<SkColorFilter> colorFilter(new SkColorMatrixFilter(matrix)); |
| return SkColorFilterImageFilter::Create(colorFilter, input); |
| } |
| |
| }; |
| |
| namespace WebCore { |
| |
| SkiaImageFilterBuilder::SkiaImageFilterBuilder() |
| { |
| } |
| |
| SkImageFilter* SkiaImageFilterBuilder::build(FilterEffect* effect) |
| { |
| if (!effect) |
| return 0; |
| |
| FilterBuilderHashMap::iterator it = m_map.find(effect); |
| if (it != m_map.end()) |
| return it->value; |
| |
| SkImageFilter* filter = effect->createImageFilter(this); |
| m_map.set(effect, filter); |
| return filter; |
| } |
| |
| SkImageFilter* SkiaImageFilterBuilder::build(const FilterOperations& operations) |
| { |
| SkImageFilter* filter = 0; |
| SkScalar matrix[20]; |
| for (size_t i = 0; i < operations.size(); ++i) { |
| const FilterOperation& op = *operations.at(i); |
| switch (op.getOperationType()) { |
| case FilterOperation::REFERENCE: { |
| FilterEffect* filterEffect = static_cast<const ReferenceFilterOperation*>(&op)->filterEffect(); |
| // FIXME: hook up parent filter to image source |
| filter = SkiaImageFilterBuilder::build(filterEffect); |
| break; |
| } |
| case FilterOperation::GRAYSCALE: { |
| float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount(); |
| getGrayscaleMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::SEPIA: { |
| float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount(); |
| getSepiaMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::SATURATE: { |
| float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount(); |
| getSaturateMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::HUE_ROTATE: { |
| float amount = static_cast<const BasicColorMatrixFilterOperation*>(&op)->amount(); |
| getHueRotateMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::INVERT: { |
| float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount(); |
| getInvertMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::OPACITY: { |
| float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount(); |
| getOpacityMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::BRIGHTNESS: { |
| float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount(); |
| getBrightnessMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::CONTRAST: { |
| float amount = static_cast<const BasicComponentTransferFilterOperation*>(&op)->amount(); |
| getContrastMatrix(amount, matrix); |
| filter = createMatrixImageFilter(matrix, filter); |
| break; |
| } |
| case FilterOperation::BLUR: { |
| float pixelRadius = static_cast<const BlurFilterOperation*>(&op)->stdDeviation().getFloatValue(); |
| filter = new SkBlurImageFilter(pixelRadius, pixelRadius, filter); |
| break; |
| } |
| case FilterOperation::DROP_SHADOW: { |
| // const DropShadowFilterOperation& dropShadowOp = *static_cast<const DropShadowFilterOperation*>(&op); |
| // FIXME: do offset and blur |
| break; |
| } |
| #if ENABLE(CSS_SHADERS) |
| case FilterOperation::VALIDATED_CUSTOM: |
| case FilterOperation::CUSTOM: |
| // Not supported. |
| #endif |
| case FilterOperation::PASSTHROUGH: |
| case FilterOperation::NONE: |
| break; |
| } |
| } |
| return filter; |
| } |
| |
| }; |
