| /* |
| * 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 FilterOperation_h |
| #define FilterOperation_h |
| |
| #include "core/CoreExport.h" |
| #include "platform/Length.h" |
| #include "platform/graphics/BoxReflection.h" |
| #include "platform/graphics/Color.h" |
| #include "platform/graphics/filters/Filter.h" |
| #include "platform/heap/Handle.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| // CSS Filters |
| |
| class CORE_EXPORT FilterOperation |
| : public GarbageCollectedFinalized<FilterOperation> { |
| WTF_MAKE_NONCOPYABLE(FilterOperation); |
| |
| public: |
| enum OperationType { |
| REFERENCE, // url(#somefilter) |
| GRAYSCALE, |
| SEPIA, |
| SATURATE, |
| HUE_ROTATE, |
| INVERT, |
| OPACITY, |
| BRIGHTNESS, |
| CONTRAST, |
| BLUR, |
| DROP_SHADOW, |
| BOX_REFLECT, |
| NONE |
| }; |
| |
| 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 REFERENCE: |
| case BOX_REFLECT: |
| return false; |
| case NONE: |
| break; |
| } |
| NOTREACHED(); |
| return false; |
| } |
| |
| virtual ~FilterOperation() {} |
| DEFINE_INLINE_VIRTUAL_TRACE() {} |
| |
| static 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 alpha channel of any pixel can change under this operation. |
| virtual bool affectsOpacity() const { return false; } |
| // 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; } |
| |
| // Maps "forward" to determine which pixels in a destination rect are |
| // affected by pixels in the source rect. |
| // See also FilterEffect::mapRect. |
| virtual FloatRect mapRect(const FloatRect& rect) const { return rect; } |
| |
| protected: |
| FilterOperation(OperationType type) : m_type(type) {} |
| |
| OperationType m_type; |
| |
| private: |
| virtual 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); |
| |
| class CORE_EXPORT ReferenceFilterOperation : public FilterOperation { |
| public: |
| static ReferenceFilterOperation* create(const String& url, |
| const AtomicString& fragment) { |
| return new ReferenceFilterOperation(url, fragment); |
| } |
| |
| bool affectsOpacity() const override { return true; } |
| bool movesPixels() const override { return true; } |
| FloatRect mapRect(const FloatRect&) const override; |
| |
| const String& url() const { return m_url; } |
| const AtomicString& fragment() const { return m_fragment; } |
| |
| Filter* getFilter() const { return m_filter.get(); } |
| void setFilter(Filter* filter) { m_filter = filter; } |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| private: |
| FilterOperation* blend(const FilterOperation* from, |
| double progress) const override { |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| bool operator==(const FilterOperation& o) const override { |
| if (!isSameType(o)) |
| return false; |
| const ReferenceFilterOperation* other = |
| static_cast<const ReferenceFilterOperation*>(&o); |
| return m_url == other->m_url; |
| } |
| |
| ReferenceFilterOperation(const String& url, const AtomicString& fragment) |
| : FilterOperation(REFERENCE), m_url(url), m_fragment(fragment) {} |
| |
| String m_url; |
| AtomicString m_fragment; |
| Member<Filter> m_filter; |
| }; |
| |
| DEFINE_FILTER_OPERATION_TYPE_CASTS(ReferenceFilterOperation, REFERENCE); |
| |
| // 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 CORE_EXPORT BasicColorMatrixFilterOperation : public FilterOperation { |
| public: |
| static BasicColorMatrixFilterOperation* create(double amount, |
| OperationType type) { |
| return new BasicColorMatrixFilterOperation(amount, type); |
| } |
| |
| double amount() const { return m_amount; } |
| |
| private: |
| FilterOperation* blend(const FilterOperation* from, |
| double progress) const override; |
| 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 CORE_EXPORT BasicComponentTransferFilterOperation |
| : public FilterOperation { |
| public: |
| static BasicComponentTransferFilterOperation* create(double amount, |
| OperationType type) { |
| return new BasicComponentTransferFilterOperation(amount, type); |
| } |
| |
| double amount() const { return m_amount; } |
| |
| bool affectsOpacity() const override { return m_type == OPACITY; } |
| |
| private: |
| FilterOperation* blend(const FilterOperation* from, |
| double progress) const override; |
| 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 CORE_EXPORT BlurFilterOperation : public FilterOperation { |
| public: |
| static BlurFilterOperation* create(const Length& stdDeviation) { |
| return new BlurFilterOperation(stdDeviation); |
| } |
| |
| const Length& stdDeviation() const { return m_stdDeviation; } |
| |
| bool affectsOpacity() const override { return true; } |
| bool movesPixels() const override { return true; } |
| FloatRect mapRect(const FloatRect&) const override; |
| |
| private: |
| FilterOperation* blend(const FilterOperation* from, |
| double progress) const override; |
| 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 CORE_EXPORT DropShadowFilterOperation : public FilterOperation { |
| public: |
| static DropShadowFilterOperation* create(const IntPoint& location, |
| int stdDeviation, |
| Color color) { |
| return 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 getColor() const { return m_color; } |
| |
| bool affectsOpacity() const override { return true; } |
| bool movesPixels() const override { return true; } |
| FloatRect mapRect(const FloatRect&) const override; |
| |
| private: |
| FilterOperation* blend(const FilterOperation* from, |
| double progress) const override; |
| 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); |
| |
| class CORE_EXPORT BoxReflectFilterOperation : public FilterOperation { |
| public: |
| static BoxReflectFilterOperation* create(const BoxReflection& reflection) { |
| return new BoxReflectFilterOperation(reflection); |
| } |
| |
| const BoxReflection& reflection() const { return m_reflection; } |
| |
| bool affectsOpacity() const override { return true; } |
| bool movesPixels() const override { return true; } |
| FloatRect mapRect(const FloatRect&) const override; |
| |
| private: |
| FilterOperation* blend(const FilterOperation* from, |
| double progress) const override; |
| bool operator==(const FilterOperation&) const override; |
| |
| BoxReflectFilterOperation(const BoxReflection& reflection) |
| : FilterOperation(BOX_REFLECT), m_reflection(reflection) {} |
| |
| BoxReflection m_reflection; |
| }; |
| DEFINE_FILTER_OPERATION_TYPE_CASTS(BoxReflectFilterOperation, BOX_REFLECT); |
| |
| } // namespace blink |
| |
| #endif // FilterOperation_h |