OLD | NEW |
1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkImageDecoder_DEFINED | 10 #ifndef SkImageDecoder_DEFINED |
(...skipping 198 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
209 /** | 209 /** |
210 * Given a stream, build an index for doing tile-based decode. | 210 * Given a stream, build an index for doing tile-based decode. |
211 * The built index will be saved in the decoder, and the image size will | 211 * The built index will be saved in the decoder, and the image size will |
212 * be returned in width and height. | 212 * be returned in width and height. |
213 * | 213 * |
214 * Return true for success or false on failure. | 214 * Return true for success or false on failure. |
215 */ | 215 */ |
216 bool buildTileIndex(SkStream*, int *width, int *height); | 216 bool buildTileIndex(SkStream*, int *width, int *height); |
217 | 217 |
218 /** | 218 /** |
219 * Decode a rectangle region in the image specified by rect. | 219 * Decode a rectangle subset in the image. |
220 * The method can only be called after buildTileIndex(). | 220 * The method can only be called after buildTileIndex(). |
221 * | 221 * |
222 * Return true for success. | 222 * Return true for success. |
223 * Return false if the index is never built or failing in decoding. | 223 * Return false if the index is never built or failing in decoding. |
224 */ | 224 */ |
225 bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect, SkBitmap::Config pr
ef); | 225 bool decodeSubset(SkBitmap* bm, const SkIRect& subset, SkBitmap::Config pref
); |
| 226 |
| 227 /** |
| 228 * @Deprecated |
| 229 * Use decodeSubset instead. |
| 230 */ |
| 231 bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect, SkBitmap::Config pr
ef) { |
| 232 return this->decodeSubset(bitmap, rect, pref); |
| 233 } |
226 | 234 |
227 /** Given a stream, this will try to find an appropriate decoder object. | 235 /** Given a stream, this will try to find an appropriate decoder object. |
228 If none is found, the method returns NULL. | 236 If none is found, the method returns NULL. |
229 */ | 237 */ |
230 static SkImageDecoder* Factory(SkStream*); | 238 static SkImageDecoder* Factory(SkStream*); |
231 | 239 |
232 /** Decode the image stored in the specified file, and store the result | 240 /** Decode the image stored in the specified file, and store the result |
233 in bitmap. Return true for success or false on failure. | 241 in bitmap. Return true for success or false on failure. |
234 | 242 |
235 If pref is kNo_Config, then the decoder is free to choose the most natur
al | 243 If pref is kNo_Config, then the decoder is free to choose the most natur
al |
(...skipping 101 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
337 virtual bool onDecode(SkStream*, SkBitmap* bitmap, Mode) = 0; | 345 virtual bool onDecode(SkStream*, SkBitmap* bitmap, Mode) = 0; |
338 | 346 |
339 // If the decoder wants to support tiled based decoding, | 347 // If the decoder wants to support tiled based decoding, |
340 // this method must be overridden. This guy is called by buildTileIndex(...) | 348 // this method must be overridden. This guy is called by buildTileIndex(...) |
341 virtual bool onBuildTileIndex(SkStream*, int *width, int *height) { | 349 virtual bool onBuildTileIndex(SkStream*, int *width, int *height) { |
342 return false; | 350 return false; |
343 } | 351 } |
344 | 352 |
345 // If the decoder wants to support tiled based decoding, | 353 // If the decoder wants to support tiled based decoding, |
346 // this method must be overridden. This guy is called by decodeRegion(...) | 354 // this method must be overridden. This guy is called by decodeRegion(...) |
347 virtual bool onDecodeRegion(SkBitmap* bitmap, const SkIRect& rect) { | 355 virtual bool onDecodeSubset(SkBitmap* bitmap, const SkIRect& rect) { |
348 return false; | 356 return false; |
349 } | 357 } |
350 | 358 |
351 /* | 359 /* |
352 * Crop a rectangle from the src Bitmap to the dest Bitmap. src and dst are | 360 * Crop a rectangle from the src Bitmap to the dest Bitmap. src and dst are |
353 * both sampled by sampleSize from an original Bitmap. | 361 * both sampled by sampleSize from an original Bitmap. |
354 * | 362 * |
355 * @param dst the destination bitmap. | 363 * @param dst the destination bitmap. |
356 * @param src the source bitmap that is sampled by sampleSize from the | 364 * @param src the source bitmap that is sampled by sampleSize from the |
357 * original bitmap. | 365 * original bitmap. |
358 * @param sampleSize the sample size that src is sampled from the original b
itmap. | 366 * @param sampleSize the sample size that src is sampled from the original b
itmap. |
359 * @param (dstX, dstY) the upper-left point of the dest bitmap in terms of | 367 * @param (dstX, dstY) the upper-left point of the dest bitmap in terms of |
360 * the coordinate in the original bitmap. | 368 * the coordinate in the original bitmap. |
361 * @param (width, height) the width and height of the unsampled dst. | 369 * @param (width, height) the width and height of the unsampled dst. |
362 * @param (srcX, srcY) the upper-left point of the src bitimap in terms of | 370 * @param (srcX, srcY) the upper-left point of the src bitmap in terms of |
363 * the coordinate in the original bitmap. | 371 * the coordinate in the original bitmap. |
| 372 * @return bool Whether or not it succeeded. |
364 */ | 373 */ |
365 void cropBitmap(SkBitmap *dst, SkBitmap *src, int sampleSize, | 374 bool cropBitmap(SkBitmap *dst, SkBitmap *src, int sampleSize, |
366 int dstX, int dstY, int width, int height, | 375 int dstX, int dstY, int width, int height, |
367 int srcX, int srcY); | 376 int srcX, int srcY); |
368 | 377 |
369 | 378 |
370 | 379 |
371 /** Can be queried from within onDecode, to see if the user (possibly in | 380 /** Can be queried from within onDecode, to see if the user (possibly in |
372 a different thread) has requested the decode to cancel. If this returns | 381 a different thread) has requested the decode to cancel. If this returns |
373 true, your onDecode() should stop and return false. | 382 true, your onDecode() should stop and return false. |
374 Each subclass needs to decide how often it can query this, to balance | 383 Each subclass needs to decide how often it can query this, to balance |
375 responsiveness with performance. | 384 responsiveness with performance. |
(...skipping 89 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
465 // not all of these will be available | 474 // not all of these will be available |
466 DECLARE_DECODER_CREATOR(BMPImageDecoder); | 475 DECLARE_DECODER_CREATOR(BMPImageDecoder); |
467 DECLARE_DECODER_CREATOR(GIFImageDecoder); | 476 DECLARE_DECODER_CREATOR(GIFImageDecoder); |
468 DECLARE_DECODER_CREATOR(ICOImageDecoder); | 477 DECLARE_DECODER_CREATOR(ICOImageDecoder); |
469 DECLARE_DECODER_CREATOR(JPEGImageDecoder); | 478 DECLARE_DECODER_CREATOR(JPEGImageDecoder); |
470 DECLARE_DECODER_CREATOR(PNGImageDecoder); | 479 DECLARE_DECODER_CREATOR(PNGImageDecoder); |
471 DECLARE_DECODER_CREATOR(WBMPImageDecoder); | 480 DECLARE_DECODER_CREATOR(WBMPImageDecoder); |
472 DECLARE_DECODER_CREATOR(WEBPImageDecoder); | 481 DECLARE_DECODER_CREATOR(WEBPImageDecoder); |
473 | 482 |
474 #endif | 483 #endif |
OLD | NEW |