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Side by Side Diff: include/core/SkImageFilter.h

Issue 1888243003: Remove deprecated paths from image filter infrastructure. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Remove some spurious printfs Created 4 years, 8 months ago
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1 /* 1 /*
2 * Copyright 2011 Google Inc. 2 * Copyright 2011 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #ifndef SkImageFilter_DEFINED 8 #ifndef SkImageFilter_DEFINED
9 #define SkImageFilter_DEFINED 9 #define SkImageFilter_DEFINED
10 10
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109 kPossible_TileUsage, //!< the created device may be drawn tiled 109 kPossible_TileUsage, //!< the created device may be drawn tiled
110 kNever_TileUsage, //!< the created device will never be drawn tile d 110 kNever_TileUsage, //!< the created device will never be drawn tile d
111 }; 111 };
112 112
113 class Proxy { 113 class Proxy {
114 public: 114 public:
115 virtual ~Proxy() {} 115 virtual ~Proxy() {}
116 116
117 virtual SkBaseDevice* createDevice(int width, int height, 117 virtual SkBaseDevice* createDevice(int width, int height,
118 TileUsage usage = kNever_TileUsage) = 0; 118 TileUsage usage = kNever_TileUsage) = 0;
119
120 // Returns true if the proxy handled the filter itself. If this returns
121 // false then the filter's code will be called.
122 virtual bool filterImage(const SkImageFilter*, const SkBitmap& src,
123 const SkImageFilter::Context&,
124 SkBitmap* result, SkIPoint* offset) = 0;
125 }; 119 };
126 120
127 class DeviceProxy : public Proxy { 121 class DeviceProxy : public Proxy {
128 public: 122 public:
129 DeviceProxy(SkBaseDevice* device) : fDevice(device) {} 123 DeviceProxy(SkBaseDevice* device) : fDevice(device) {}
130 124
131 SkBaseDevice* createDevice(int width, int height, 125 SkBaseDevice* createDevice(int width, int height,
132 TileUsage usage = kNever_TileUsage) override; 126 TileUsage usage = kNever_TileUsage) override;
133 127
134 // Returns true if the proxy handled the filter itself. If this returns
135 // false then the filter's code will be called.
136 bool filterImage(const SkImageFilter*, const SkBitmap& src, const SkImag eFilter::Context&,
137 SkBitmap* result, SkIPoint* offset) override;
138
139 private: 128 private:
140 SkBaseDevice* fDevice; 129 SkBaseDevice* fDevice;
141 }; 130 };
142 131
143 /** 132 /**
144 * Request a new (result) image to be created from the src image. 133 * Request a new (result) image to be created from the src image.
145 * 134 *
146 * The context contains the environment in which the filter is occurring. 135 * The context contains the environment in which the filter is occurring.
147 * It includes the clip bounds, CTM and cache. 136 * It includes the clip bounds, CTM and cache.
148 * 137 *
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168 * kReverse_MapDirection is used to determine which rect of the source 157 * kReverse_MapDirection is used to determine which rect of the source
169 * image would be required to fill the given rect (typically, clip bounds). 158 * image would be required to fill the given rect (typically, clip bounds).
170 * Used for clipping and temp-buffer allocations, so the result need not 159 * Used for clipping and temp-buffer allocations, so the result need not
171 * be exact, but should never be smaller than the real answer. The default 160 * be exact, but should never be smaller than the real answer. The default
172 * implementation recursively unions all input bounds, or returns the 161 * implementation recursively unions all input bounds, or returns the
173 * source rect if no inputs. 162 * source rect if no inputs.
174 */ 163 */
175 SkIRect filterBounds(const SkIRect& src, const SkMatrix& ctm, 164 SkIRect filterBounds(const SkIRect& src, const SkMatrix& ctm,
176 MapDirection = kReverse_MapDirection) const; 165 MapDirection = kReverse_MapDirection) const;
177 166
178 /**
179 * Returns true if the filter can be processed on the GPU. This is most
180 * often used for multi-pass effects, where intermediate results must be
181 * rendered to textures. For single-pass effects, use asFragmentProcessor( ).
182 * The default implementation returns asFragmentProcessor(NULL, NULL, SkMat rix::I(),
183 * SkIRect()).
184 */
185 virtual bool canFilterImageGPU() const { return false; }
186
187 /**
188 * Process this image filter on the GPU. This is most often used for
189 * multi-pass effects, where intermediate results must be rendered to
190 * textures. For single-pass effects, use asFragmentProcessor(). src is t he
191 * source image for processing, as a texture-backed bitmap. result is
192 * the destination bitmap, which should contain a texture-backed pixelref
193 * on success. offset is the amount to translate the resulting image
194 * relative to the src when it is drawn. The default implementation does
195 * single-pass processing using asFragmentProcessor().
196 */
197 virtual bool filterImageGPUDeprecated(Proxy*, const SkBitmap&, const Context &,
198 SkBitmap*, SkIPoint*) const {
199 SkASSERT(false);
200 return false;
201 }
202
203 #if SK_SUPPORT_GPU 167 #if SK_SUPPORT_GPU
204 static sk_sp<SkSpecialImage> DrawWithFP(GrContext* context, 168 static sk_sp<SkSpecialImage> DrawWithFP(GrContext* context,
205 sk_sp<GrFragmentProcessor> fp, 169 sk_sp<GrFragmentProcessor> fp,
206 const SkIRect& bounds, 170 const SkIRect& bounds,
207 SkImageFilter::Proxy* proxy); 171 SkImageFilter::Proxy* proxy);
208 #endif 172 #endif
209 173
210 /** 174 /**
211 * Returns whether this image filter is a color filter and puts the color f ilter into the 175 * Returns whether this image filter is a color filter and puts the color f ilter into the
212 * "filterPtr" parameter if it can. Does nothing otherwise. 176 * "filterPtr" parameter if it can. Does nothing otherwise.
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291 return MakeMatrixFilter(matrix, filterQuality, sk_ref_sp<SkImageFilter>( input)).release(); 255 return MakeMatrixFilter(matrix, filterQuality, sk_ref_sp<SkImageFilter>( input)).release();
292 } 256 }
293 #endif 257 #endif
294 258
295 259
296 sk_sp<SkSpecialImage> filterInput(int index, 260 sk_sp<SkSpecialImage> filterInput(int index,
297 SkSpecialImage* src, 261 SkSpecialImage* src,
298 const Context&, 262 const Context&,
299 SkIPoint* offset) const; 263 SkIPoint* offset) const;
300 264
301 #if SK_SUPPORT_GPU
302 // Helper function which invokes GPU filter processing on the
303 // input at the specified "index". If the input is null, it leaves
304 // "result" and "offset" untouched, and returns true. If the input
305 // has a GPU implementation, it will be invoked directly.
306 // Otherwise, the filter will be processed in software and
307 // uploaded to the GPU.
308 bool filterInputGPUDeprecated(int index, SkImageFilter::Proxy* proxy,
309 const SkBitmap& src, const Context&,
310 SkBitmap* result, SkIPoint* offset) const;
311 #endif
312
313 SK_TO_STRING_PUREVIRT() 265 SK_TO_STRING_PUREVIRT()
314 SK_DEFINE_FLATTENABLE_TYPE(SkImageFilter) 266 SK_DEFINE_FLATTENABLE_TYPE(SkImageFilter)
315 267
316 protected: 268 protected:
317 class Common { 269 class Common {
318 public: 270 public:
319 /** 271 /**
320 * Attempt to unflatten the cropRect and the expected number of input f ilters. 272 * Attempt to unflatten the cropRect and the expected number of input f ilters.
321 * If any number of input filters is valid, pass -1. 273 * If any number of input filters is valid, pass -1.
322 * If this fails (i.e. corrupt buffer or contents) then return false an d common will 274 * If this fails (i.e. corrupt buffer or contents) then return false an d common will
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433 385
434 /** A variant of the above call which takes the original source bitmap and 386 /** A variant of the above call which takes the original source bitmap and
435 * source offset. If the resulting crop rect is not entirely contained by 387 * source offset. If the resulting crop rect is not entirely contained by
436 * the source bitmap's bounds, it creates a new bitmap in "result" and 388 * the source bitmap's bounds, it creates a new bitmap in "result" and
437 * pads the edges with transparent black. In that case, the srcOffset is 389 * pads the edges with transparent black. In that case, the srcOffset is
438 * modified to be the same as the bounds, since no further adjustment is 390 * modified to be the same as the bounds, since no further adjustment is
439 * needed by the caller. This version should only be used by filters 391 * needed by the caller. This version should only be used by filters
440 * which are not capable of processing a smaller source bitmap into a 392 * which are not capable of processing a smaller source bitmap into a
441 * larger destination. 393 * larger destination.
442 */ 394 */
443 bool applyCropRectDeprecated(const Context&, Proxy* proxy, const SkBitmap& s rc,
444 SkIPoint* srcOffset, SkIRect* bounds, SkBitmap* result) const;
445
446 sk_sp<SkSpecialImage> applyCropRect(const Context&, SkSpecialImage* src, SkI Point* srcOffset, 395 sk_sp<SkSpecialImage> applyCropRect(const Context&, SkSpecialImage* src, SkI Point* srcOffset,
447 SkIRect* bounds) const; 396 SkIRect* bounds) const;
448 397
449 /** 398 /**
450 * Creates a modified Context for use when recursing up the image filter DA G. 399 * Creates a modified Context for use when recursing up the image filter DA G.
451 * The clip bounds are adjusted to accommodate any margins that this 400 * The clip bounds are adjusted to accommodate any margins that this
452 * filter requires by calling this node's 401 * filter requires by calling this node's
453 * onFilterNodeBounds(..., kReverse_MapDirection). 402 * onFilterNodeBounds(..., kReverse_MapDirection).
454 */ 403 */
455 Context mapContext(const Context& ctx) const; 404 Context mapContext(const Context& ctx) const;
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480 */ 429 */
481 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \ 430 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \
482 Common localVar; \ 431 Common localVar; \
483 do { \ 432 do { \
484 if (!localVar.unflatten(buffer, expectedCount)) { \ 433 if (!localVar.unflatten(buffer, expectedCount)) { \
485 return NULL; \ 434 return NULL; \
486 } \ 435 } \
487 } while (0) 436 } while (0)
488 437
489 #endif 438 #endif
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