| /* |
| * Copyright (C) 2011 Apple 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 COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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. |
| */ |
| |
| #ifndef SKY_ENGINE_PLATFORM_GRAPHICS_FILTERS_FILTEROPERATION_H_ |
| #define SKY_ENGINE_PLATFORM_GRAPHICS_FILTERS_FILTEROPERATION_H_ |
| |
| #include "sky/engine/platform/Length.h" |
| #include "sky/engine/platform/PlatformExport.h" |
| #include "sky/engine/platform/graphics/Color.h" |
| #include "sky/engine/platform/graphics/filters/Filter.h" |
| #include "sky/engine/wtf/OwnPtr.h" |
| #include "sky/engine/wtf/PassOwnPtr.h" |
| #include "sky/engine/wtf/RefCounted.h" |
| #include "sky/engine/wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| // CSS Filters |
| |
| class PLATFORM_EXPORT FilterOperation : public RefCounted<FilterOperation> { |
| public: |
| enum OperationType { |
| GRAYSCALE, |
| SEPIA, |
| SATURATE, |
| HUE_ROTATE, |
| INVERT, |
| OPACITY, |
| BRIGHTNESS, |
| CONTRAST, |
| BLUR, |
| DROP_SHADOW, |
| NONE |
| }; |
| |
| // FIXME(sky): Remove |
| static bool canInterpolate(FilterOperation::OperationType type) |
| { |
| switch (type) { |
| case GRAYSCALE: |
| case SEPIA: |
| case SATURATE: |
| case HUE_ROTATE: |
| case INVERT: |
| case OPACITY: |
| case BRIGHTNESS: |
| case CONTRAST: |
| case BLUR: |
| case DROP_SHADOW: |
| return true; |
| case NONE: |
| break; |
| } |
| ASSERT_NOT_REACHED(); |
| return false; |
| } |
| |
| virtual ~FilterOperation() { } |
| |
| static PassRefPtr<FilterOperation> blend(const FilterOperation* from, const FilterOperation* to, double progress); |
| virtual bool operator==(const FilterOperation&) const = 0; |
| bool operator!=(const FilterOperation& o) const { return !(*this == o); } |
| |
| OperationType type() const { return m_type; } |
| virtual bool isSameType(const FilterOperation& o) const { return o.type() == m_type; } |
| |
| // True if the the value of one pixel can affect the value of another pixel under this operation, such as blur. |
| virtual bool movesPixels() const { return false; } |
| |
| protected: |
| FilterOperation(OperationType type) |
| : m_type(type) |
| { |
| } |
| |
| OperationType m_type; |
| |
| private: |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const = 0; |
| }; |
| |
| #define DEFINE_FILTER_OPERATION_TYPE_CASTS(thisType, operationType) \ |
| DEFINE_TYPE_CASTS(thisType, FilterOperation, op, op->type() == FilterOperation::operationType, op.type() == FilterOperation::operationType); |
| |
| // GRAYSCALE, SEPIA, SATURATE and HUE_ROTATE are variations on a basic color matrix effect. |
| // For HUE_ROTATE, the angle of rotation is stored in m_amount. |
| class PLATFORM_EXPORT BasicColorMatrixFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type) |
| { |
| return adoptRef(new BasicColorMatrixFilterOperation(amount, type)); |
| } |
| |
| double amount() const { return m_amount; } |
| |
| |
| private: |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override; |
| virtual bool operator==(const FilterOperation& o) const override |
| { |
| if (!isSameType(o)) |
| return false; |
| const BasicColorMatrixFilterOperation* other = static_cast<const BasicColorMatrixFilterOperation*>(&o); |
| return m_amount == other->m_amount; |
| } |
| |
| BasicColorMatrixFilterOperation(double amount, OperationType type) |
| : FilterOperation(type) |
| , m_amount(amount) |
| { |
| } |
| |
| double m_amount; |
| }; |
| |
| inline bool isBasicColorMatrixFilterOperation(const FilterOperation& operation) |
| { |
| FilterOperation::OperationType type = operation.type(); |
| return type == FilterOperation::GRAYSCALE || type == FilterOperation::SEPIA || type == FilterOperation::SATURATE || type == FilterOperation::HUE_ROTATE; |
| } |
| |
| DEFINE_TYPE_CASTS(BasicColorMatrixFilterOperation, FilterOperation, op, isBasicColorMatrixFilterOperation(*op), isBasicColorMatrixFilterOperation(op)); |
| |
| // INVERT, BRIGHTNESS, CONTRAST and OPACITY are variations on a basic component transfer effect. |
| class PLATFORM_EXPORT BasicComponentTransferFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type) |
| { |
| return adoptRef(new BasicComponentTransferFilterOperation(amount, type)); |
| } |
| |
| double amount() const { return m_amount; } |
| |
| |
| private: |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override; |
| virtual bool operator==(const FilterOperation& o) const override |
| { |
| if (!isSameType(o)) |
| return false; |
| const BasicComponentTransferFilterOperation* other = static_cast<const BasicComponentTransferFilterOperation*>(&o); |
| return m_amount == other->m_amount; |
| } |
| |
| BasicComponentTransferFilterOperation(double amount, OperationType type) |
| : FilterOperation(type) |
| , m_amount(amount) |
| { |
| } |
| |
| double m_amount; |
| }; |
| |
| inline bool isBasicComponentTransferFilterOperation(const FilterOperation& operation) |
| { |
| FilterOperation::OperationType type = operation.type(); |
| return type == FilterOperation::INVERT || type == FilterOperation::OPACITY || type == FilterOperation::BRIGHTNESS || type == FilterOperation::CONTRAST; |
| } |
| |
| DEFINE_TYPE_CASTS(BasicComponentTransferFilterOperation, FilterOperation, op, isBasicComponentTransferFilterOperation(*op), isBasicComponentTransferFilterOperation(op)); |
| |
| class PLATFORM_EXPORT BlurFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<BlurFilterOperation> create(const Length& stdDeviation) |
| { |
| return adoptRef(new BlurFilterOperation(stdDeviation)); |
| } |
| |
| const Length& stdDeviation() const { return m_stdDeviation; } |
| |
| virtual bool movesPixels() const override { return true; } |
| |
| |
| private: |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override; |
| virtual bool operator==(const FilterOperation& o) const override |
| { |
| if (!isSameType(o)) |
| return false; |
| const BlurFilterOperation* other = static_cast<const BlurFilterOperation*>(&o); |
| return m_stdDeviation == other->m_stdDeviation; |
| } |
| |
| BlurFilterOperation(const Length& stdDeviation) |
| : FilterOperation(BLUR) |
| , m_stdDeviation(stdDeviation) |
| { |
| } |
| |
| Length m_stdDeviation; |
| }; |
| |
| DEFINE_FILTER_OPERATION_TYPE_CASTS(BlurFilterOperation, BLUR); |
| |
| class PLATFORM_EXPORT DropShadowFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color) |
| { |
| return adoptRef(new DropShadowFilterOperation(location, stdDeviation, color)); |
| } |
| |
| int x() const { return m_location.x(); } |
| int y() const { return m_location.y(); } |
| IntPoint location() const { return m_location; } |
| int stdDeviation() const { return m_stdDeviation; } |
| Color color() const { return m_color; } |
| |
| virtual bool movesPixels() const override { return true; } |
| |
| |
| private: |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override; |
| virtual bool operator==(const FilterOperation& o) const override |
| { |
| if (!isSameType(o)) |
| return false; |
| const DropShadowFilterOperation* other = static_cast<const DropShadowFilterOperation*>(&o); |
| return m_location == other->m_location && m_stdDeviation == other->m_stdDeviation && m_color == other->m_color; |
| } |
| |
| DropShadowFilterOperation(const IntPoint& location, int stdDeviation, Color color) |
| : FilterOperation(DROP_SHADOW) |
| , m_location(location) |
| , m_stdDeviation(stdDeviation) |
| , m_color(color) |
| { |
| } |
| |
| IntPoint m_location; // FIXME: should location be in Lengths? |
| int m_stdDeviation; |
| Color m_color; |
| }; |
| |
| DEFINE_FILTER_OPERATION_TYPE_CASTS(DropShadowFilterOperation, DROP_SHADOW); |
| |
| } // namespace blink |
| |
| |
| #endif // SKY_ENGINE_PLATFORM_GRAPHICS_FILTERS_FILTEROPERATION_H_ |