| /* |
| * 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/fetch/DocumentResourceReference.h" |
| #include "core/platform/graphics/Color.h" |
| #include "core/platform/graphics/filters/Filter.h" |
| #include "core/platform/graphics/filters/ReferenceFilter.h" |
| #include "platform/Length.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/RefCounted.h" |
| #include "wtf/text/WTFString.h" |
| |
| // Annoyingly, wingdi.h #defines this. |
| #ifdef PASSTHROUGH |
| #undef PASSTHROUGH |
| #endif |
| |
| namespace WebCore { |
| |
| // CSS Filters |
| |
| class FilterOperation : public RefCounted<FilterOperation> { |
| public: |
| enum OperationType { |
| REFERENCE, // url(#somefilter) |
| GRAYSCALE, |
| SEPIA, |
| SATURATE, |
| HUE_ROTATE, |
| INVERT, |
| OPACITY, |
| BRIGHTNESS, |
| CONTRAST, |
| BLUR, |
| DROP_SHADOW, |
| CUSTOM, |
| VALIDATED_CUSTOM, |
| PASSTHROUGH, |
| NONE |
| }; |
| |
| virtual ~FilterOperation() { } |
| |
| virtual bool operator==(const FilterOperation&) const = 0; |
| bool operator!=(const FilterOperation& o) const { return !(*this == o); } |
| |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* /*from*/, double /*progress*/, bool /*blendToPassthrough*/ = false) |
| { |
| return 0; |
| } |
| |
| virtual OperationType getOperationType() const { return m_type; } |
| virtual bool isSameType(const FilterOperation& o) const { return o.getOperationType() == m_type; } |
| |
| virtual bool isDefault() const { return false; } |
| |
| // 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; } |
| |
| protected: |
| FilterOperation(OperationType type) |
| : m_type(type) |
| { |
| } |
| |
| OperationType m_type; |
| }; |
| |
| class DefaultFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<DefaultFilterOperation> create(OperationType type) |
| { |
| return adoptRef(new DefaultFilterOperation(type)); |
| } |
| |
| private: |
| |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| return isSameType(o); |
| } |
| |
| virtual bool isDefault() const { return true; } |
| |
| DefaultFilterOperation(OperationType type) |
| : FilterOperation(type) |
| { |
| } |
| }; |
| |
| class PassthroughFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<PassthroughFilterOperation> create() |
| { |
| return adoptRef(new PassthroughFilterOperation()); |
| } |
| |
| private: |
| |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| return isSameType(o); |
| } |
| |
| PassthroughFilterOperation() |
| : FilterOperation(PASSTHROUGH) |
| { |
| } |
| }; |
| |
| class ReferenceFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<ReferenceFilterOperation> create(const String& url, const String& fragment, OperationType type) |
| { |
| return adoptRef(new ReferenceFilterOperation(url, fragment, type)); |
| } |
| |
| virtual bool affectsOpacity() const { return true; } |
| virtual bool movesPixels() const { return true; } |
| |
| const String& url() const { return m_url; } |
| const String& fragment() const { return m_fragment; } |
| |
| DocumentResourceReference* documentResourceReference() const { return m_documentResourceReference.get(); } |
| void setDocumentResourceReference(PassOwnPtr<DocumentResourceReference> documentResourceReference) { m_documentResourceReference = documentResourceReference; } |
| |
| ReferenceFilter* filter() const { return m_filter.get(); } |
| void setFilter(PassRefPtr<ReferenceFilter> filter) { m_filter = filter; } |
| |
| private: |
| |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| if (!isSameType(o)) |
| return false; |
| const ReferenceFilterOperation* other = static_cast<const ReferenceFilterOperation*>(&o); |
| return m_url == other->m_url; |
| } |
| |
| ReferenceFilterOperation(const String& url, const String& fragment, OperationType type) |
| : FilterOperation(type) |
| , m_url(url) |
| , m_fragment(fragment) |
| { |
| } |
| |
| String m_url; |
| String m_fragment; |
| OwnPtr<DocumentResourceReference> m_documentResourceReference; |
| RefPtr<ReferenceFilter> m_filter; |
| }; |
| |
| // 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 BasicColorMatrixFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type) |
| { |
| return adoptRef(new BasicColorMatrixFilterOperation(amount, type)); |
| } |
| |
| double amount() const { return m_amount; } |
| |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress, bool blendToPassthrough = false); |
| |
| private: |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| if (!isSameType(o)) |
| return false; |
| const BasicColorMatrixFilterOperation* other = static_cast<const BasicColorMatrixFilterOperation*>(&o); |
| return m_amount == other->m_amount; |
| } |
| |
| double passthroughAmount() const; |
| |
| BasicColorMatrixFilterOperation(double amount, OperationType type) |
| : FilterOperation(type) |
| , m_amount(amount) |
| { |
| } |
| |
| double m_amount; |
| }; |
| |
| // INVERT, BRIGHTNESS, CONTRAST and OPACITY are variations on a basic component transfer effect. |
| class BasicComponentTransferFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type) |
| { |
| return adoptRef(new BasicComponentTransferFilterOperation(amount, type)); |
| } |
| |
| double amount() const { return m_amount; } |
| |
| virtual bool affectsOpacity() const { return m_type == OPACITY; } |
| |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress, bool blendToPassthrough = false); |
| |
| private: |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| if (!isSameType(o)) |
| return false; |
| const BasicComponentTransferFilterOperation* other = static_cast<const BasicComponentTransferFilterOperation*>(&o); |
| return m_amount == other->m_amount; |
| } |
| |
| double passthroughAmount() const; |
| |
| BasicComponentTransferFilterOperation(double amount, OperationType type) |
| : FilterOperation(type) |
| , m_amount(amount) |
| { |
| } |
| |
| double m_amount; |
| }; |
| |
| class GammaFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<GammaFilterOperation> create(double amplitude, double exponent, double offset, OperationType type) |
| { |
| return adoptRef(new GammaFilterOperation(amplitude, exponent, offset, type)); |
| } |
| |
| double amplitude() const { return m_amplitude; } |
| double exponent() const { return m_exponent; } |
| double offset() const { return m_offset; } |
| |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress, bool blendToPassthrough = false); |
| |
| private: |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| if (!isSameType(o)) |
| return false; |
| const GammaFilterOperation* other = static_cast<const GammaFilterOperation*>(&o); |
| return m_amplitude == other->m_amplitude && m_exponent == other->m_exponent && m_offset == other->m_offset; |
| } |
| |
| GammaFilterOperation(double amplitude, double exponent, double offset, OperationType type) |
| : FilterOperation(type) |
| , m_amplitude(amplitude) |
| , m_exponent(exponent) |
| , m_offset(offset) |
| { |
| } |
| |
| double m_amplitude; |
| double m_exponent; |
| double m_offset; |
| }; |
| |
| class BlurFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<BlurFilterOperation> create(Length stdDeviation, OperationType type) |
| { |
| return adoptRef(new BlurFilterOperation(stdDeviation, type)); |
| } |
| |
| Length stdDeviation() const { return m_stdDeviation; } |
| |
| virtual bool affectsOpacity() const { return true; } |
| virtual bool movesPixels() const { return true; } |
| |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress, bool blendToPassthrough = false); |
| |
| private: |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| if (!isSameType(o)) |
| return false; |
| const BlurFilterOperation* other = static_cast<const BlurFilterOperation*>(&o); |
| return m_stdDeviation == other->m_stdDeviation; |
| } |
| |
| BlurFilterOperation(Length stdDeviation, OperationType type) |
| : FilterOperation(type) |
| , m_stdDeviation(stdDeviation) |
| { |
| } |
| |
| Length m_stdDeviation; |
| }; |
| |
| class DropShadowFilterOperation : public FilterOperation { |
| public: |
| static PassRefPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color, OperationType type) |
| { |
| return adoptRef(new DropShadowFilterOperation(location, stdDeviation, color, type)); |
| } |
| |
| 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 affectsOpacity() const { return true; } |
| virtual bool movesPixels() const { return true; } |
| |
| virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress, bool blendToPassthrough = false); |
| |
| private: |
| |
| virtual bool operator==(const FilterOperation& o) const |
| { |
| 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, OperationType type) |
| : FilterOperation(type) |
| , m_location(location) |
| , m_stdDeviation(stdDeviation) |
| , m_color(color) |
| { |
| } |
| |
| IntPoint m_location; // FIXME: should location be in Lengths? |
| int m_stdDeviation; |
| Color m_color; |
| }; |
| |
| } // namespace WebCore |
| |
| |
| #endif // FilterOperation_h |