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1 /* | 1 /* |
2 * Copyright 2007 The Android Open Source Project | 2 * Copyright 2007 The Android Open Source Project |
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 | 8 #include "SkImageDecoder_libjpeg.h" |
9 #include "SkImageDecoder.h" | |
10 #include "SkImageEncoder.h" | |
11 #include "SkJpegUtility.h" | |
12 #include "SkColorPriv.h" | 9 #include "SkColorPriv.h" |
13 #include "SkDither.h" | 10 #include "SkDither.h" |
| 11 #include "SkJpegUtility.h" |
14 #include "SkScaledBitmapSampler.h" | 12 #include "SkScaledBitmapSampler.h" |
15 #include "SkStream.h" | 13 #include "SkStream.h" |
16 #include "SkTemplates.h" | 14 #include "SkTemplates.h" |
17 #include "SkTime.h" | 15 #include "SkTime.h" |
18 #include "SkUtils.h" | 16 #include "SkUtils.h" |
19 #include "SkRTConf.h" | 17 #include "SkRTConf.h" |
20 #include "SkRect.h" | 18 #include "SkRect.h" |
21 #include "SkCanvas.h" | 19 #include "SkCanvas.h" |
22 | 20 |
23 | 21 |
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1404 srcRow = (const void*)((const char*)srcRow + bm.rowBytes()); | 1402 srcRow = (const void*)((const char*)srcRow + bm.rowBytes()); |
1405 } | 1403 } |
1406 | 1404 |
1407 jpeg_finish_compress(&cinfo); | 1405 jpeg_finish_compress(&cinfo); |
1408 jpeg_destroy_compress(&cinfo); | 1406 jpeg_destroy_compress(&cinfo); |
1409 | 1407 |
1410 return true; | 1408 return true; |
1411 } | 1409 } |
1412 }; | 1410 }; |
1413 | 1411 |
1414 /////////////////////////////////////////////////////////////////////////////// | 1412 SkImageDecoder::Format SkDetectFormatJPEGImageDecoder(SkStreamRewindable* stream
) { |
1415 DEFINE_DECODER_CREATOR(JPEGImageDecoder); | |
1416 DEFINE_ENCODER_CREATOR(JPEGImageEncoder); | |
1417 /////////////////////////////////////////////////////////////////////////////// | |
1418 | |
1419 static bool is_jpeg(SkStreamRewindable* stream) { | |
1420 static const unsigned char gHeader[] = { 0xFF, 0xD8, 0xFF }; | 1413 static const unsigned char gHeader[] = { 0xFF, 0xD8, 0xFF }; |
1421 static const size_t HEADER_SIZE = sizeof(gHeader); | 1414 static const size_t HEADER_SIZE = sizeof(gHeader); |
1422 | 1415 |
1423 char buffer[HEADER_SIZE]; | 1416 char buffer[HEADER_SIZE]; |
1424 size_t len = stream->read(buffer, HEADER_SIZE); | 1417 size_t len = stream->read(buffer, HEADER_SIZE); |
1425 | 1418 |
1426 if (len != HEADER_SIZE) { | 1419 if (len != HEADER_SIZE) { |
1427 return false; // can't read enough | 1420 return SkImageDecoder::kUnknown_Format; // can't read enough |
1428 } | 1421 } |
1429 if (memcmp(buffer, gHeader, HEADER_SIZE)) { | 1422 if (memcmp(buffer, gHeader, HEADER_SIZE)) { |
1430 return false; | 1423 return SkImageDecoder::kUnknown_Format; |
1431 } | 1424 } |
1432 return true; | 1425 return SkImageDecoder::kJPEG_Format; |
1433 } | 1426 } |
1434 | 1427 |
1435 | 1428 SkImageDecoder* SkCreateJPEGImageDecoder(SkImageDecoder::Format format) { |
1436 static SkImageDecoder* sk_libjpeg_dfactory(SkStreamRewindable* stream) { | 1429 SkASSERT(SkImageDecoder::kJPEG_Format == format); |
1437 if (is_jpeg(stream)) { | 1430 return SkNEW(SkJPEGImageDecoder); |
1438 return SkNEW(SkJPEGImageDecoder); | |
1439 } | |
1440 return NULL; | |
1441 } | 1431 } |
1442 | 1432 |
1443 static SkImageDecoder::Format get_format_jpeg(SkStreamRewindable* stream) { | 1433 SkImageEncoder* SkCreateJPEGImageEncoder(SkImageEncoder::Type t) { |
1444 if (is_jpeg(stream)) { | |
1445 return SkImageDecoder::kJPEG_Format; | |
1446 } | |
1447 return SkImageDecoder::kUnknown_Format; | |
1448 } | |
1449 | |
1450 static SkImageEncoder* sk_libjpeg_efactory(SkImageEncoder::Type t) { | |
1451 return (SkImageEncoder::kJPEG_Type == t) ? SkNEW(SkJPEGImageEncoder) : NULL; | 1434 return (SkImageEncoder::kJPEG_Type == t) ? SkNEW(SkJPEGImageEncoder) : NULL; |
1452 } | 1435 } |
1453 | |
1454 static SkImageDecoder_DecodeReg gDReg(sk_libjpeg_dfactory); | |
1455 static SkImageDecoder_FormatReg gFormatReg(get_format_jpeg); | |
1456 static SkImageEncoder_EncodeReg gEReg(sk_libjpeg_efactory); | |
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