OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 SkImageGenerator_DEFINED | 8 #ifndef SkImageGenerator_DEFINED |
9 #define SkImageGenerator_DEFINED | 9 #define SkImageGenerator_DEFINED |
10 | 10 |
(...skipping 134 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
145 * | 145 * |
146 * Regarding the GrTextureParams parameter: | 146 * Regarding the GrTextureParams parameter: |
147 * | 147 * |
148 * If the context (the provided one or the generator's intrinsic one) deter
mines that to | 148 * If the context (the provided one or the generator's intrinsic one) deter
mines that to |
149 * support the specified usage, it must return a different sized texture it
may, | 149 * support the specified usage, it must return a different sized texture it
may, |
150 * so the caller must inspect the texture's width/height and compare them t
o the generator's | 150 * so the caller must inspect the texture's width/height and compare them t
o the generator's |
151 * getInfo() width/height. For readback usage use GrTextureParams::ClampNoF
ilter() | 151 * getInfo() width/height. For readback usage use GrTextureParams::ClampNoF
ilter() |
152 */ | 152 */ |
153 GrTexture* generateTexture(GrContext*, const SkIRect* subset = nullptr); | 153 GrTexture* generateTexture(GrContext*, const SkIRect* subset = nullptr); |
154 | 154 |
| 155 struct SupportedSizes { |
| 156 SkISize fSizes[2]; |
| 157 }; |
| 158 |
| 159 /** |
| 160 * Some generators can efficiently scale their contents. If this is support
ed, the generator |
| 161 * may only support certain scaled dimensions. Call this with the desired s
cale factor, |
| 162 * and it will return true if scaling is supported, and in supportedSizes[]
it will return |
| 163 * the nearest supported dimensions. |
| 164 * |
| 165 * If no native scaling is supported, or scale is invalid (e.g. scale <= 0
|| scale > 1) |
| 166 * this will return false, and the supportedsizes will be undefined. |
| 167 */ |
| 168 bool computeScaledDimensions(SkScalar scale, SupportedSizes*); |
| 169 |
| 170 /** |
| 171 * Scale the generator's pixels to fit into scaledSize. |
| 172 * This routine also support retrieving only a subset of the pixels. That s
ubset is specified |
| 173 * by the following rectangle (in the scaled space): |
| 174 * |
| 175 * subset = SkIRect::MakeXYWH(subsetOrigin.x(), subsetOrigin.y(), |
| 176 * subsetPixels.width(), subsetPixels.height
()) |
| 177 * |
| 178 * If subset is not contained inside the scaledSize, this returns false. |
| 179 * |
| 180 * whole = SkIRect::MakeWH(scaledSize.width(), scaledSize.height()) |
| 181 * if (!whole.contains(subset)) { |
| 182 * return false; |
| 183 * } |
| 184 * |
| 185 * If the requested colortype/alphatype in pixels is not supported, |
| 186 * or the requested scaledSize is not supported, or the generator encounter
s an error, |
| 187 * this returns false. |
| 188 */ |
| 189 bool generateScaledPixels(const SkISize& scaledSize, const SkIPoint& subsetO
rigin, |
| 190 const SkPixmap& subsetPixels); |
| 191 |
| 192 bool generateScaledPixels(const SkPixmap& scaledPixels) { |
| 193 return this->generateScaledPixels(SkISize::Make(scaledPixels.width(), |
| 194 scaledPixels.height()), |
| 195 SkIPoint::Make(0, 0), scaledPixels); |
| 196 } |
| 197 |
155 /** | 198 /** |
156 * If the default image decoder system can interpret the specified (encoded
) data, then | 199 * If the default image decoder system can interpret the specified (encoded
) data, then |
157 * this returns a new ImageGenerator for it. Otherwise this returns NULL. E
ither way | 200 * this returns a new ImageGenerator for it. Otherwise this returns NULL. E
ither way |
158 * the caller is still responsible for managing their ownership of the data
. | 201 * the caller is still responsible for managing their ownership of the data
. |
159 */ | 202 */ |
160 static SkImageGenerator* NewFromEncoded(SkData*); | 203 static SkImageGenerator* NewFromEncoded(SkData*); |
161 | 204 |
162 /** Return a new image generator backed by the specified picture. If the si
ze is empty or | 205 /** Return a new image generator backed by the specified picture. If the si
ze is empty or |
163 * the picture is NULL, this returns NULL. | 206 * the picture is NULL, this returns NULL. |
164 * The optional matrix and paint arguments are passed to drawPicture() at r
asterization | 207 * The optional matrix and paint arguments are passed to drawPicture() at r
asterization |
(...skipping 27 matching lines...) Expand all Loading... |
192 virtual bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBy
tes, | 235 virtual bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBy
tes, |
193 SkPMColor ctable[], int* ctableCount); | 236 SkPMColor ctable[], int* ctableCount); |
194 virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBy
tes[3]); | 237 virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBy
tes[3]); |
195 virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBy
tes[3], | 238 virtual bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBy
tes[3], |
196 SkYUVColorSpace* colorSpace); | 239 SkYUVColorSpace* colorSpace); |
197 | 240 |
198 virtual GrTexture* onGenerateTexture(GrContext*, const SkIRect*) { | 241 virtual GrTexture* onGenerateTexture(GrContext*, const SkIRect*) { |
199 return nullptr; | 242 return nullptr; |
200 } | 243 } |
201 | 244 |
| 245 virtual bool onComputeScaledDimensions(SkScalar, SupportedSizes*) { |
| 246 return false; |
| 247 } |
| 248 virtual bool onGenerateScaledPixels(const SkISize&, const SkIPoint&, const S
kPixmap&) { |
| 249 return false; |
| 250 } |
| 251 |
202 bool tryGenerateBitmap(SkBitmap* bm, const SkImageInfo* optionalInfo, SkBitm
ap::Allocator*); | 252 bool tryGenerateBitmap(SkBitmap* bm, const SkImageInfo* optionalInfo, SkBitm
ap::Allocator*); |
203 | 253 |
204 private: | 254 private: |
205 const SkImageInfo fInfo; | 255 const SkImageInfo fInfo; |
206 const uint32_t fUniqueID; | 256 const uint32_t fUniqueID; |
207 | 257 |
208 // This is our default impl, which may be different on different platforms. | 258 // This is our default impl, which may be different on different platforms. |
209 // It is called from NewFromEncoded() after it has checked for any runtime f
actory. | 259 // It is called from NewFromEncoded() after it has checked for any runtime f
actory. |
210 // The SkData will never be NULL, as that will have been checked by NewFromE
ncoded. | 260 // The SkData will never be NULL, as that will have been checked by NewFromE
ncoded. |
211 static SkImageGenerator* NewFromEncodedImpl(SkData*); | 261 static SkImageGenerator* NewFromEncodedImpl(SkData*); |
212 }; | 262 }; |
213 | 263 |
214 #endif // SkImageGenerator_DEFINED | 264 #endif // SkImageGenerator_DEFINED |
OLD | NEW |