2 * Copyright (C) 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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)
60 static bool canInterpolate(FilterOperation::OperationType type)
83 virtual ~FilterOperation() { }
85 static PassRefPtr<FilterOperation> blend(const FilterOperation* from, const FilterOperation* to, double progress);
86 virtual bool operator==(const FilterOperation&) const = 0;
87 bool operator!=(const FilterOperation& o) const { return !(*this == o); }
89 OperationType type() const { return m_type; }
90 virtual bool isSameType(const FilterOperation& o) const { return o.type() == m_type; }
92 // True if the alpha channel of any pixel can change under this operation.
93 virtual bool affectsOpacity() const { return false; }
94 // True if the the value of one pixel can affect the value of another pixel under this operation, such as blur.
95 virtual bool movesPixels() const { return false; }
98 FilterOperation(OperationType type)
103 OperationType m_type;
106 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const = 0;
109 #define DEFINE_FILTER_OPERATION_TYPE_CASTS(thisType, operationType) \
110 DEFINE_TYPE_CASTS(thisType, FilterOperation, op, op->type() == FilterOperation::operationType, op.type() == FilterOperation::operationType);
112 class PLATFORM_EXPORT ReferenceFilterOperation : public FilterOperation {
114 static PassRefPtr<ReferenceFilterOperation> create(const String& url, const AtomicString& fragment)
116 return adoptRef(new ReferenceFilterOperation(url, fragment));
119 virtual bool affectsOpacity() const OVERRIDE { return true; }
120 virtual bool movesPixels() const OVERRIDE { return true; }
122 const String& url() const { return m_url; }
123 const AtomicString& fragment() const { return m_fragment; }
125 ReferenceFilter* filter() const { return m_filter.get(); }
126 void setFilter(PassRefPtr<ReferenceFilter> filter) { m_filter = filter; }
129 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE
131 ASSERT_NOT_REACHED();
135 virtual bool operator==(const FilterOperation& o) const OVERRIDE
139 const ReferenceFilterOperation* other = static_cast<const ReferenceFilterOperation*>(&o);
140 return m_url == other->m_url;
143 ReferenceFilterOperation(const String& url, const AtomicString& fragment)
144 : FilterOperation(REFERENCE)
146 , m_fragment(fragment)
151 AtomicString m_fragment;
152 RefPtr<ReferenceFilter> m_filter;
155 DEFINE_FILTER_OPERATION_TYPE_CASTS(ReferenceFilterOperation, REFERENCE);
157 // GRAYSCALE, SEPIA, SATURATE and HUE_ROTATE are variations on a basic color matrix effect.
158 // For HUE_ROTATE, the angle of rotation is stored in m_amount.
159 class PLATFORM_EXPORT BasicColorMatrixFilterOperation : public FilterOperation {
161 static PassRefPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type)
163 return adoptRef(new BasicColorMatrixFilterOperation(amount, type));
166 double amount() const { return m_amount; }
170 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
171 virtual bool operator==(const FilterOperation& o) const OVERRIDE
175 const BasicColorMatrixFilterOperation* other = static_cast<const BasicColorMatrixFilterOperation*>(&o);
176 return m_amount == other->m_amount;
179 BasicColorMatrixFilterOperation(double amount, OperationType type)
180 : FilterOperation(type)
188 inline bool isBasicColorMatrixFilterOperation(const FilterOperation& operation)
190 FilterOperation::OperationType type = operation.type();
191 return type == FilterOperation::GRAYSCALE || type == FilterOperation::SEPIA || type == FilterOperation::SATURATE || type == FilterOperation::HUE_ROTATE;
194 DEFINE_TYPE_CASTS(BasicColorMatrixFilterOperation, FilterOperation, op, isBasicColorMatrixFilterOperation(*op), isBasicColorMatrixFilterOperation(op));
196 // INVERT, BRIGHTNESS, CONTRAST and OPACITY are variations on a basic component transfer effect.
197 class PLATFORM_EXPORT BasicComponentTransferFilterOperation : public FilterOperation {
199 static PassRefPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type)
201 return adoptRef(new BasicComponentTransferFilterOperation(amount, type));
204 double amount() const { return m_amount; }
206 virtual bool affectsOpacity() const OVERRIDE { return m_type == OPACITY; }
210 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
211 virtual bool operator==(const FilterOperation& o) const OVERRIDE
215 const BasicComponentTransferFilterOperation* other = static_cast<const BasicComponentTransferFilterOperation*>(&o);
216 return m_amount == other->m_amount;
219 BasicComponentTransferFilterOperation(double amount, OperationType type)
220 : FilterOperation(type)
228 inline bool isBasicComponentTransferFilterOperation(const FilterOperation& operation)
230 FilterOperation::OperationType type = operation.type();
231 return type == FilterOperation::INVERT || type == FilterOperation::OPACITY || type == FilterOperation::BRIGHTNESS || type == FilterOperation::CONTRAST;
234 DEFINE_TYPE_CASTS(BasicComponentTransferFilterOperation, FilterOperation, op, isBasicComponentTransferFilterOperation(*op), isBasicComponentTransferFilterOperation(op));
236 class PLATFORM_EXPORT BlurFilterOperation : public FilterOperation {
238 static PassRefPtr<BlurFilterOperation> create(const Length& stdDeviation)
240 return adoptRef(new BlurFilterOperation(stdDeviation));
243 const Length& stdDeviation() const { return m_stdDeviation; }
245 virtual bool affectsOpacity() const OVERRIDE { return true; }
246 virtual bool movesPixels() const OVERRIDE { return true; }
250 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
251 virtual bool operator==(const FilterOperation& o) const OVERRIDE
255 const BlurFilterOperation* other = static_cast<const BlurFilterOperation*>(&o);
256 return m_stdDeviation == other->m_stdDeviation;
259 BlurFilterOperation(const Length& stdDeviation)
260 : FilterOperation(BLUR)
261 , m_stdDeviation(stdDeviation)
265 Length m_stdDeviation;
268 DEFINE_FILTER_OPERATION_TYPE_CASTS(BlurFilterOperation, BLUR);
270 class PLATFORM_EXPORT DropShadowFilterOperation : public FilterOperation {
272 static PassRefPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color)
274 return adoptRef(new DropShadowFilterOperation(location, stdDeviation, color));
277 int x() const { return m_location.x(); }
278 int y() const { return m_location.y(); }
279 IntPoint location() const { return m_location; }
280 int stdDeviation() const { return m_stdDeviation; }
281 Color color() const { return m_color; }
283 virtual bool affectsOpacity() const OVERRIDE { return true; }
284 virtual bool movesPixels() const OVERRIDE { return true; }
288 virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const OVERRIDE;
289 virtual bool operator==(const FilterOperation& o) const OVERRIDE
293 const DropShadowFilterOperation* other = static_cast<const DropShadowFilterOperation*>(&o);
294 return m_location == other->m_location && m_stdDeviation == other->m_stdDeviation && m_color == other->m_color;
297 DropShadowFilterOperation(const IntPoint& location, int stdDeviation, Color color)
298 : FilterOperation(DROP_SHADOW)
299 , m_location(location)
300 , m_stdDeviation(stdDeviation)
305 IntPoint m_location; // FIXME: should location be in Lengths?
310 DEFINE_FILTER_OPERATION_TYPE_CASTS(DropShadowFilterOperation, DROP_SHADOW);
315 #endif // FilterOperation_h