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26 #ifndef FilterOperation_h
27 #define FilterOperation_h
29 #include "platform/Length.h"
30 #include "platform/PlatformExport.h"
31 #include "platform/graphics/Color.h"
32 #include "platform/graphics/filters/Filter.h"
33 #include "platform/graphics/filters/ReferenceFilter.h"
34 #include "wtf/OwnPtr.h"
35 #include "wtf/PassOwnPtr.h"
36 #include "wtf/RefCounted.h"
37 #include "wtf/text/WTFString.h"
43 class PLATFORM_EXPORT FilterOperation : public RefCounted<FilterOperation> {
46 REFERENCE, // url(#somefilter)
62 static bool canInterpolate(FilterOperation::OperationType type)
76 case VALIDATED_CUSTOM:
87 virtual ~FilterOperation() { }
89 static PassRefPtr<FilterOperation> blend(const FilterOperation* from, const FilterOperation* to, double progress);
90 virtual bool operator==(const FilterOperation&) const = 0;
91 bool operator!=(const FilterOperation& o) const { return !(*this == o); }
93 OperationType type() const { return m_type; }
94 virtual bool isSameType(const FilterOperation& o) const { return o.type() == m_type; }
96 // True if the alpha channel of any pixel can change under this operation.
97 virtual bool affectsOpacity() const { return false; }
98 // True if the the value of one pixel can affect the value of another pixel under this operation, such as blur.
99 virtual bool movesPixels() const { return false; }
102 FilterOperation(OperationType type)
107 OperationType m_type;
110 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const = 0;
113 #define DEFINE_FILTER_OPERATION_TYPE_CASTS(thisType, operationType) \
114 DEFINE_TYPE_CASTS(thisType, FilterOperation, op, op->type() == FilterOperation::operationType, op.type() == FilterOperation::operationType);
116 class PLATFORM_EXPORT ReferenceFilterOperation : public FilterOperation {
118 static PassRefPtr<ReferenceFilterOperation> create(const String& url, const AtomicString& fragment)
120 return adoptRef(new ReferenceFilterOperation(url, fragment));
123 virtual bool affectsOpacity() const OVERRIDE { return true; }
124 virtual bool movesPixels() const OVERRIDE { return true; }
126 const String& url() const { return m_url; }
127 const AtomicString& fragment() const { return m_fragment; }
129 ReferenceFilter* filter() const { return m_filter.get(); }
130 void setFilter(PassRefPtr<ReferenceFilter> filter) { m_filter = filter; }
133 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE
135 ASSERT_NOT_REACHED();
139 virtual bool operator==(const FilterOperation& o) const OVERRIDE
143 const ReferenceFilterOperation* other = static_cast<const ReferenceFilterOperation*>(&o);
144 return m_url == other->m_url;
147 ReferenceFilterOperation(const String& url, const AtomicString& fragment)
148 : FilterOperation(REFERENCE)
150 , m_fragment(fragment)
155 AtomicString m_fragment;
156 RefPtr<ReferenceFilter> m_filter;
159 DEFINE_FILTER_OPERATION_TYPE_CASTS(ReferenceFilterOperation, REFERENCE);
161 // GRAYSCALE, SEPIA, SATURATE and HUE_ROTATE are variations on a basic color matrix effect.
162 // For HUE_ROTATE, the angle of rotation is stored in m_amount.
163 class PLATFORM_EXPORT BasicColorMatrixFilterOperation : public FilterOperation {
165 static PassRefPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type)
167 return adoptRef(new BasicColorMatrixFilterOperation(amount, type));
170 double amount() const { return m_amount; }
174 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
175 virtual bool operator==(const FilterOperation& o) const OVERRIDE
179 const BasicColorMatrixFilterOperation* other = static_cast<const BasicColorMatrixFilterOperation*>(&o);
180 return m_amount == other->m_amount;
183 BasicColorMatrixFilterOperation(double amount, OperationType type)
184 : FilterOperation(type)
192 inline bool isBasicColorMatrixFilterOperation(const FilterOperation& operation)
194 FilterOperation::OperationType type = operation.type();
195 return type == FilterOperation::GRAYSCALE || type == FilterOperation::SEPIA || type == FilterOperation::SATURATE || type == FilterOperation::HUE_ROTATE;
198 DEFINE_TYPE_CASTS(BasicColorMatrixFilterOperation, FilterOperation, op, isBasicColorMatrixFilterOperation(*op), isBasicColorMatrixFilterOperation(op));
200 // INVERT, BRIGHTNESS, CONTRAST and OPACITY are variations on a basic component transfer effect.
201 class PLATFORM_EXPORT BasicComponentTransferFilterOperation : public FilterOperation {
203 static PassRefPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type)
205 return adoptRef(new BasicComponentTransferFilterOperation(amount, type));
208 double amount() const { return m_amount; }
210 virtual bool affectsOpacity() const OVERRIDE { return m_type == OPACITY; }
214 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
215 virtual bool operator==(const FilterOperation& o) const OVERRIDE
219 const BasicComponentTransferFilterOperation* other = static_cast<const BasicComponentTransferFilterOperation*>(&o);
220 return m_amount == other->m_amount;
223 BasicComponentTransferFilterOperation(double amount, OperationType type)
224 : FilterOperation(type)
232 inline bool isBasicComponentTransferFilterOperation(const FilterOperation& operation)
234 FilterOperation::OperationType type = operation.type();
235 return type == FilterOperation::INVERT || type == FilterOperation::OPACITY || type == FilterOperation::BRIGHTNESS || type == FilterOperation::CONTRAST;
238 DEFINE_TYPE_CASTS(BasicComponentTransferFilterOperation, FilterOperation, op, isBasicComponentTransferFilterOperation(*op), isBasicComponentTransferFilterOperation(op));
240 class PLATFORM_EXPORT BlurFilterOperation : public FilterOperation {
242 static PassRefPtr<BlurFilterOperation> create(Length stdDeviation)
244 return adoptRef(new BlurFilterOperation(stdDeviation));
247 Length stdDeviation() const { return m_stdDeviation; }
249 virtual bool affectsOpacity() const OVERRIDE { return true; }
250 virtual bool movesPixels() const OVERRIDE { return true; }
254 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
255 virtual bool operator==(const FilterOperation& o) const OVERRIDE
259 const BlurFilterOperation* other = static_cast<const BlurFilterOperation*>(&o);
260 return m_stdDeviation == other->m_stdDeviation;
263 BlurFilterOperation(Length stdDeviation)
264 : FilterOperation(BLUR)
265 , m_stdDeviation(stdDeviation)
269 Length m_stdDeviation;
272 DEFINE_FILTER_OPERATION_TYPE_CASTS(BlurFilterOperation, BLUR);
274 class PLATFORM_EXPORT DropShadowFilterOperation : public FilterOperation {
276 static PassRefPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color)
278 return adoptRef(new DropShadowFilterOperation(location, stdDeviation, color));
281 int x() const { return m_location.x(); }
282 int y() const { return m_location.y(); }
283 IntPoint location() const { return m_location; }
284 int stdDeviation() const { return m_stdDeviation; }
285 Color color() const { return m_color; }
287 virtual bool affectsOpacity() const OVERRIDE { return true; }
288 virtual bool movesPixels() const OVERRIDE { return true; }
292 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
293 virtual bool operator==(const FilterOperation& o) const OVERRIDE
297 const DropShadowFilterOperation* other = static_cast<const DropShadowFilterOperation*>(&o);
298 return m_location == other->m_location && m_stdDeviation == other->m_stdDeviation && m_color == other->m_color;
301 DropShadowFilterOperation(const IntPoint& location, int stdDeviation, Color color)
302 : FilterOperation(DROP_SHADOW)
303 , m_location(location)
304 , m_stdDeviation(stdDeviation)
309 IntPoint m_location; // FIXME: should location be in Lengths?
314 DEFINE_FILTER_OPERATION_TYPE_CASTS(DropShadowFilterOperation, DROP_SHADOW);
316 } // namespace WebCore
319 #endif // FilterOperation_h