wrrle.c revision c6a7fc661d57f86ac08cd637abc881cbe687b11a
1d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* 2d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * wrrle.c 3d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 4d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Copyright (C) 1991-1996, Thomas G. Lane. 5d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * This file is part of the Independent JPEG Group's software. 6d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * For conditions of distribution and use, see the accompanying README file. 7d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 8323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) * This file contains routines to write output images in RLE format. 9323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) * The Utah Raster Toolkit library is required (version 3.1 or later). 10c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) * 11d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * These routines may need modification for non-Unix environments or 12d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * specialized applications. As they stand, they assume output to 137242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci * an ordinary stdio stream. 147242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci * 15d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Based on code contributed by Mike Lijewski, 16d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * with updates from Robert Hutchinson. 17d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 18d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 19e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles)#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ 2043e7502580f146aa5b3db8267ba6dbb5c733a489Torne (Richard Coles) 21d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef RLE_SUPPORTED 22d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 23d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* rle.h is provided by the Utah Raster Toolkit. */ 24d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 25d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#include <rle.h> 26d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 277242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci/* 28d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * We assume that JSAMPLE has the same representation as rle_pixel, 29d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * to wit, "unsigned char". Hence we can't cope with 12- or 16-bit samples. 30d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 31323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) 32d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#if BITS_IN_JSAMPLE != 8 33d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */ 34323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles)#endif 35d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 36d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 37d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* 385d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) * Since RLE stores scanlines bottom-to-top, we have to invert the image 395d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) * from JPEG's top-to-bottom order. To do this, we save the outgoing data 405d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) * in a virtual array during put_pixel_row calls, then actually emit the 415d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) * RLE file during finish_output. 427242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci */ 437242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 447242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 455d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)/* 465d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) * For now, if we emit an RLE color map then it is always 256 entries long, 475d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) * though not all of the entries need be used. 485d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) */ 495d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) 505d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)#define CMAPBITS 8 515d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)#define CMAPLENGTH (1<<(CMAPBITS)) 525d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) 535d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)typedef struct { 545d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) struct djpeg_dest_struct pub; /* public fields */ 555d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) 565d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) jvirt_sarray_ptr image; /* virtual array to store the output image */ 575d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) rle_map *colormap; /* RLE-style color map, or NULL if none */ 585d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) rle_pixel **rle_row; /* To pass rows to rle_putrow() */ 595d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) 605d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)} rle_dest_struct; 61d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 625d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles)typedef rle_dest_struct * rle_dest_ptr; 635d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) 64d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* Forward declarations */ 65d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)METHODDEF(void) rle_put_pixel_rows 66d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) JPP((j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, 67d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) JDIMENSION rows_supplied)); 687242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 697242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 70d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* 71d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Write the file header. 72d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 73d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * In this module it's easier to wait till finish_output to write anything. 74d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 75d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 76d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)METHODDEF(void) 77d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)start_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo) 78d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 79d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_dest_ptr dest = (rle_dest_ptr) dinfo; 80d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) size_t cmapsize; 81d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) int i, ci; 82d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef PROGRESS_REPORT 83d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress; 84d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#endif 85d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 86d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* 87d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Make sure the image can be stored in RLE format. 88d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 89d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * - RLE stores image dimensions as *signed* 16 bit integers. JPEG 90d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * uses unsigned, so we have to check the width. 91d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 92d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * - Colorspace is expected to be grayscale or RGB. 93d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 947242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci * - The number of channels (components) is expected to be 1 (grayscale/ 957242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci * pseudocolor) or 3 (truecolor/directcolor). 967242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci * (could be 2 or 4 if using an alpha channel, but we aren't) 97d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 98d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 99d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (cinfo->output_width > 32767 || cinfo->output_height > 32767) 100d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ERREXIT2(cinfo, JERR_RLE_DIMENSIONS, cinfo->output_width, 101d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) cinfo->output_height); 102d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 1037242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (cinfo->out_color_space != JCS_GRAYSCALE && 1047242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci cinfo->out_color_space != JCS_RGB) 1057242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci ERREXIT(cinfo, JERR_RLE_COLORSPACE); 106d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 1077242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (cinfo->output_components != 1 && cinfo->output_components != 3) 108d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ERREXIT1(cinfo, JERR_RLE_TOOMANYCHANNELS, cinfo->num_components); 109d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 110d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Convert colormap, if any, to RLE format. */ 111d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 1127242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci dest->colormap = NULL; 1137242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 1147242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci if (cinfo->quantize_colors) { 115d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Allocate storage for RLE-style cmap, zero any extra entries */ 116d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) cmapsize = cinfo->out_color_components * CMAPLENGTH * SIZEOF(rle_map); 117d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) dest->colormap = (rle_map *) (*cinfo->mem->alloc_small) 118d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ((j_common_ptr) cinfo, JPOOL_IMAGE, cmapsize); 1197242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci MEMZERO(dest->colormap, cmapsize); 1207242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 1217242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci /* Save away data in RLE format --- note 8-bit left shift! */ 122d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Shifting would need adjustment for JSAMPLEs wider than 8 bits. */ 1237242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci for (ci = 0; ci < cinfo->out_color_components; ci++) { 124d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) for (i = 0; i < cinfo->actual_number_of_colors; i++) { 125d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) dest->colormap[ci * CMAPLENGTH + i] = 126d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) GETJSAMPLE(cinfo->colormap[ci][i]) << 8; 127d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 1287242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci } 1297242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci } 1307242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci 131d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Set the output buffer to the first row */ 132d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) dest->pub.buffer = (*cinfo->mem->access_virt_sarray) 133d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ((j_common_ptr) cinfo, dest->image, (JDIMENSION) 0, (JDIMENSION) 1, TRUE); 134d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) dest->pub.buffer_height = 1; 135d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 136d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) dest->pub.put_pixel_rows = rle_put_pixel_rows; 137d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 138d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef PROGRESS_REPORT 139d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (progress != NULL) { 140d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) progress->total_extra_passes++; /* count file writing as separate pass */ 141d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 142d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#endif 143d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 144d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 145d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 146d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* 147d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Write some pixel data. 148d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 149d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * This routine just saves the data away in a virtual array. 150d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 151d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 152d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)METHODDEF(void) 153d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)rle_put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, 154d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) JDIMENSION rows_supplied) 155d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 156d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_dest_ptr dest = (rle_dest_ptr) dinfo; 157d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 158d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (cinfo->output_scanline < cinfo->output_height) { 159d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) dest->pub.buffer = (*cinfo->mem->access_virt_sarray) 160d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ((j_common_ptr) cinfo, dest->image, 161d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) cinfo->output_scanline, (JDIMENSION) 1, TRUE); 162d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 163d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 164d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 165d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)/* 166d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Finish up at the end of the file. 167d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * 168d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * Here is where we really output the RLE file. 169d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 170d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 171d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)METHODDEF(void) 172d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)finish_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo) 173d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 174d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_dest_ptr dest = (rle_dest_ptr) dinfo; 175d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_hdr header; /* Output file information */ 176d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_pixel **rle_row, *red, *green, *blue; 177d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) JSAMPROW output_row; 178d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) char cmapcomment[80]; 179d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) int row, col; 180d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) int ci; 181d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef PROGRESS_REPORT 182d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress; 183d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#endif 184d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 185d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Initialize the header info */ 186d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header = *rle_hdr_init(NULL); 187d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.rle_file = dest->pub.output_file; 188d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.xmin = 0; 189d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.xmax = cinfo->output_width - 1; 190d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.ymin = 0; 191d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.ymax = cinfo->output_height - 1; 192d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.alpha = 0; 193d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.ncolors = cinfo->output_components; 194d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) for (ci = 0; ci < cinfo->output_components; ci++) { 195d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) RLE_SET_BIT(header, ci); 196d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 197d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (cinfo->quantize_colors) { 198d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.ncmap = cinfo->out_color_components; 199d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.cmaplen = CMAPBITS; 200d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) header.cmap = dest->colormap; 201d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Add a comment to the output image with the true colormap length. */ 202d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) sprintf(cmapcomment, "color_map_length=%d", cinfo->actual_number_of_colors); 203d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_putcom(cmapcomment, &header); 204d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 205d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 206d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Emit the RLE header and color map (if any) */ 207d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_put_setup(&header); 208d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 209d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) /* Now output the RLE data from our virtual array. 210d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * We assume here that (a) rle_pixel is represented the same as JSAMPLE, 211d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) * and (b) we are not on a machine where FAR pointers differ from regular. 212d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) */ 213d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 214d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef PROGRESS_REPORT 215d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (progress != NULL) { 2167242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci progress->pub.pass_limit = cinfo->output_height; 217d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) progress->pub.pass_counter = 0; 218d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) (*progress->pub.progress_monitor) ((j_common_ptr) cinfo); 219d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 220d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#endif 221d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 222d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (cinfo->output_components == 1) { 223d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) for (row = cinfo->output_height-1; row >= 0; row--) { 224d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_row = (rle_pixel **) (*cinfo->mem->access_virt_sarray) 225d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ((j_common_ptr) cinfo, dest->image, 226d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) (JDIMENSION) row, (JDIMENSION) 1, FALSE); 227d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_putrow(rle_row, (int) cinfo->output_width, &header); 228d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef PROGRESS_REPORT 229d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (progress != NULL) { 230d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) progress->pub.pass_counter++; 231d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) (*progress->pub.progress_monitor) ((j_common_ptr) cinfo); 232e38fbeeb576b5094e34e038ab88d9d6a5c5c2214Torne (Richard Coles) } 233d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#endif 234d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 235d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } else { 2367242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci for (row = cinfo->output_height-1; row >= 0; row--) { 2377242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci rle_row = (rle_pixel **) dest->rle_row; 2387242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci output_row = * (*cinfo->mem->access_virt_sarray) 239d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) ((j_common_ptr) cinfo, dest->image, 240d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) (JDIMENSION) row, (JDIMENSION) 1, FALSE); 241d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) red = rle_row[0]; 242d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) green = rle_row[1]; 243d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) blue = rle_row[2]; 244323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) for (col = cinfo->output_width; col > 0; col--) { 245323480423219ecd77329f8326dc5e0e3b50926d4Torne (Richard Coles) *red++ = GETJSAMPLE(*output_row++); 246d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) *green++ = GETJSAMPLE(*output_row++); 247d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) *blue++ = GETJSAMPLE(*output_row++); 248d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 249d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) rle_putrow(rle_row, (int) cinfo->output_width, &header); 250d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#ifdef PROGRESS_REPORT 251d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (progress != NULL) { 252d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) progress->pub.pass_counter++; 253d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) (*progress->pub.progress_monitor) ((j_common_ptr) cinfo); 254d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) } 255d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)#endif 256c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) } 257 } 258 259#ifdef PROGRESS_REPORT 260 if (progress != NULL) 261 progress->completed_extra_passes++; 262#endif 263 264 /* Emit file trailer */ 265 rle_puteof(&header); 266 fflush(dest->pub.output_file); 267 if (ferror(dest->pub.output_file)) 268 ERREXIT(cinfo, JERR_FILE_WRITE); 269} 270 271 272/* 273 * The module selection routine for RLE format output. 274 */ 275 276GLOBAL(djpeg_dest_ptr) 277jinit_write_rle (j_decompress_ptr cinfo) 278{ 279 rle_dest_ptr dest; 280 281 /* Create module interface object, fill in method pointers */ 282 dest = (rle_dest_ptr) 283 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 284 SIZEOF(rle_dest_struct)); 285 dest->pub.start_output = start_output_rle; 286 dest->pub.finish_output = finish_output_rle; 287 288 /* Calculate output image dimensions so we can allocate space */ 289 jpeg_calc_output_dimensions(cinfo); 290 291 /* Allocate a work array for output to the RLE library. */ 292 dest->rle_row = (*cinfo->mem->alloc_sarray) 293 ((j_common_ptr) cinfo, JPOOL_IMAGE, 294 cinfo->output_width, (JDIMENSION) cinfo->output_components); 295 296 /* Allocate a virtual array to hold the image. */ 297 dest->image = (*cinfo->mem->request_virt_sarray) 298 ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE, 299 (JDIMENSION) (cinfo->output_width * cinfo->output_components), 300 cinfo->output_height, (JDIMENSION) 1); 301 302 return (djpeg_dest_ptr) dest; 303} 304 305#endif /* RLE_SUPPORTED */ 306