1 /* 2 * cdjpeg.h 3 * 4 * Copyright (C) 1994-1996, Thomas G. Lane. 5 * This file is part of the Independent JPEG Group's software. 6 * For conditions of distribution and use, see the accompanying README file. 7 * 8 * This file contains common declarations for the sample applications 9 * cjpeg and djpeg. It is NOT used by the core JPEG library. 10 */ 11 12 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ 13 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ 14 #include "sane/sanei_jinclude.h" 15 #include "jpeglib.h" 16 #include "jerror.h" /* get library error codes too */ 17 #include "sane/sanei_cderror.h" /* get application-specific error codes */ 18 19 /* 20 * Object interface for djpeg's output file encoding modules 21 */ 22 23 typedef struct djpeg_dest_struct * djpeg_dest_ptr; 24 25 struct djpeg_dest_struct { 26 /* start_output is called after jpeg_start_decompress finishes. 27 * The color map will be ready at this time, if one is needed. 28 */ 29 JMETHOD(void, start_output, (j_decompress_ptr cinfo, 30 djpeg_dest_ptr dinfo)); 31 /* Emit the specified number of pixel rows from the buffer. */ 32 JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo, 33 djpeg_dest_ptr dinfo, 34 JDIMENSION rows_supplied, 35 char *data)); 36 /* Finish up at the end of the image. */ 37 JMETHOD(void, finish_output, (j_decompress_ptr cinfo, 38 djpeg_dest_ptr dinfo)); 39 40 /* Target file spec; filled in by djpeg.c after object is created. */ 41 FILE * output_file; 42 43 /* Output pixel-row buffer. Created by module init or start_output. 44 * Width is cinfo->output_width * cinfo->output_components; 45 * height is buffer_height. 46 */ 47 JSAMPARRAY buffer; 48 JDIMENSION buffer_height; 49 }; 50 51 /* Module selection routines for I/O modules. */ 52 53 EXTERN(djpeg_dest_ptr) sanei_jpeg_jinit_write_ppm JPP((j_decompress_ptr cinfo)); 54 55 /* miscellaneous useful macros */ 56