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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 #include "DMSrcSink.h" | 8 #include "DMSrcSink.h" |
9 #include "SamplePipeControllers.h" | 9 #include "SamplePipeControllers.h" |
10 #include "SkCodec.h" | 10 #include "SkCodec.h" |
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348 case SkCodec::kIncompleteInput: | 348 case SkCodec::kIncompleteInput: |
349 break; | 349 break; |
350 default: | 350 default: |
351 return SkStringPrintf("Cannot skip scanlines for %s.
", fPath.c_str()); | 351 return SkStringPrintf("Cannot skip scanlines for %s.
", fPath.c_str()); |
352 } | 352 } |
353 } | 353 } |
354 } | 354 } |
355 canvas->drawBitmap(bitmap, 0, 0); | 355 canvas->drawBitmap(bitmap, 0, 0); |
356 break; | 356 break; |
357 } | 357 } |
| 358 case kSubset_Mode: { |
| 359 // Arbitrarily choose a divisor. |
| 360 int divisor = 2; |
| 361 // Total width/height of the image. |
| 362 const int W = codec->getInfo().width(); |
| 363 const int H = codec->getInfo().height(); |
| 364 if (divisor > W || divisor > H) { |
| 365 return Error::Nonfatal(SkStringPrintf("Cannot codec subset: divi
sor %d is too big " |
| 366 "for %s with dimensions (%
d x %d)", divisor, |
| 367 fPath.c_str(), W, H)); |
| 368 } |
| 369 // subset dimensions |
| 370 // SkWebpCodec, the only one that supports subsets, requires even to
p/left boundaries. |
| 371 const int w = SkAlign2(W / divisor); |
| 372 const int h = SkAlign2(H / divisor); |
| 373 SkCodec::Options opts; |
| 374 SkBitmap subsetBm; |
| 375 // We will reuse pixel memory from bitmap. |
| 376 void* pixels = bitmap.getPixels(); |
| 377 // Keep track of left and top (for drawing subsetBm into canvas). We
could use |
| 378 // fScale * x and fScale * y, but we want integers such that the nex
t subset will start |
| 379 // where the last one ended. So we'll add decodeInfo.width() and hei
ght(). |
| 380 int left = 0; |
| 381 for (int x = 0; x < W; x += w) { |
| 382 int top = 0; |
| 383 for (int y = 0; y < H; y+= h) { |
| 384 // Do not make the subset go off the edge of the image. |
| 385 const int preScaleW = SkTMin(w, W - x); |
| 386 const int preScaleH = SkTMin(h, H - y); |
| 387 opts.fSubset.setXYWH(x, y, preScaleW, preScaleH); |
| 388 // And scale |
| 389 decodeInfo = decodeInfo.makeWH(preScaleW * fScale, preScaleH
* fScale); |
| 390 size_t rowBytes = decodeInfo.minRowBytes(); |
| 391 if (!subsetBm.installPixels(decodeInfo, pixels, rowBytes, co
lorTable.get(), |
| 392 NULL, NULL)) { |
| 393 return SkStringPrintf("could not install pixels for %s."
, fPath.c_str()); |
| 394 } |
| 395 const SkCodec::Result result = codec->getPixels(decodeInfo,
pixels, rowBytes, |
| 396 &opts, colorPtr, colorCountPtr); |
| 397 switch (result) { |
| 398 case SkCodec::kSuccess: |
| 399 case SkCodec::kIncompleteInput: |
| 400 break; |
| 401 case SkCodec::kUnimplemented: |
| 402 if (0 == (x|y)) { |
| 403 // First subset is okay to return unimplemented. |
| 404 return Error::Nonfatal("subset codec not support
ed"); |
| 405 } |
| 406 // If the first subset succeeded, why would a later
one fail? |
| 407 // fall through to failure |
| 408 default: |
| 409 return SkStringPrintf("subset codec failed to decode
(%d, %d, %d, %d) " |
| 410 "from %s with dimensions (%d x
%d)\t error %d", |
| 411 x, y, decodeInfo.width(), deco
deInfo.height(), |
| 412 fPath.c_str(), W, H, result); |
| 413 } |
| 414 canvas->drawBitmap(subsetBm, left, top); |
| 415 // translate by the scaled height. |
| 416 top += decodeInfo.height(); |
| 417 } |
| 418 // translate by the scaled width. |
| 419 left += decodeInfo.width(); |
| 420 } |
| 421 return ""; |
| 422 } |
358 } | 423 } |
359 return ""; | 424 return ""; |
360 } | 425 } |
361 | 426 |
362 SkISize CodecSrc::size() const { | 427 SkISize CodecSrc::size() const { |
363 SkAutoTUnref<SkData> encoded(SkData::NewFromFileName(fPath.c_str())); | 428 SkAutoTUnref<SkData> encoded(SkData::NewFromFileName(fPath.c_str())); |
364 SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(encoded)); | 429 SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(encoded)); |
365 if (NULL != codec) { | 430 if (NULL != codec) { |
366 SkISize size = codec->getScaledDimensions(fScale); | 431 SkISize size = codec->getScaledDimensions(fScale); |
367 return size; | 432 return size; |
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989 skr.visit<void>(i, drawsAsSingletonPictures); | 1054 skr.visit<void>(i, drawsAsSingletonPictures); |
990 } | 1055 } |
991 SkAutoTUnref<SkPicture> macroPic(macroRec.endRecordingAsPicture()); | 1056 SkAutoTUnref<SkPicture> macroPic(macroRec.endRecordingAsPicture()); |
992 | 1057 |
993 canvas->drawPicture(macroPic); | 1058 canvas->drawPicture(macroPic); |
994 return ""; | 1059 return ""; |
995 }); | 1060 }); |
996 } | 1061 } |
997 | 1062 |
998 } // namespace DM | 1063 } // namespace DM |
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