The Tor Browser: gfx/skia/trunk/src/images/SkJpegUtility.h@a63d609f5ebe

     2 /*

     3  * Copyright 2010 The Android Open Source Project

     4  *

     5  * Use of this source code is governed by a BSD-style license that can be

     6  * found in the LICENSE file.

     7  */

    10 #ifndef SkJpegUtility_DEFINED

    11 #define SkJpegUtility_DEFINED

    13 #include "SkImageDecoder.h"

    14 #include "SkStream.h"

    16 extern "C" {

    17     #include "jpeglib.h"

    18     #include "jerror.h"

    19 }

    21 #include <setjmp.h>

    23 /* Our error-handling struct.

    24  *

    25 */

    26 struct skjpeg_error_mgr : jpeg_error_mgr {

    27     jmp_buf fJmpBuf;

    28 };

    31 void skjpeg_error_exit(j_common_ptr cinfo);

    33 ///////////////////////////////////////////////////////////////////////////

    34 /* Our source struct for directing jpeg to our stream object.

    35 */

    36 struct skjpeg_source_mgr : jpeg_source_mgr {

    37     skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder);

    38     ~skjpeg_source_mgr();

    40     // fStream is ref'ed and unref'ed

    41     SkStream*       fStream;

    42     // Unowned pointer to the decoder, used to check if the decoding process

    43     // has been cancelled.

    44     SkImageDecoder* fDecoder;

    45     enum {

    46         kBufferSize = 1024

    47     };

    48     char    fBuffer[kBufferSize];

    49 };

    51 /////////////////////////////////////////////////////////////////////////////

    52 /* Our destination struct for directing decompressed pixels to our stream

    53  * object.

    54  */

    55 struct skjpeg_destination_mgr : jpeg_destination_mgr {

    56     skjpeg_destination_mgr(SkWStream* stream);

    58     SkWStream*  fStream;

    60     enum {

    61         kBufferSize = 1024

    62     };

    63     uint8_t fBuffer[kBufferSize];

    64 };

    66 #endif

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