1 /* Copyright (C) 1995, 2000 Aladdin Enterprises. All rights reserved. 2 3 This file is part of AFPL Ghostscript. 4 5 AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or 6 distributor accepts any responsibility for the consequences of using it, or 7 for whether it serves any particular purpose or works at all, unless he or 8 she says so in writing. Refer to the Aladdin Free Public License (the 9 "License") for full details. 10 11 Every copy of AFPL Ghostscript must include a copy of the License, normally 12 in a plain ASCII text file named PUBLIC. The License grants you the right 13 to copy, modify and redistribute AFPL Ghostscript, but only under certain 14 conditions described in the License. Among other things, the License 15 requires that the copyright notice and this notice be preserved on all 16 copies. 17 */ 18 19 /*$Id: gdevtfnx.c,v 1.5 2001/02/03 18:50:01 raph Exp $ */ 20 /* 12-bit & 24-bit RGB uncompressed TIFF driver */ 21 #include "gdevprn.h" 22 #include "gdevtifs.h" 23 24 /* 25 * Thanks to Alan Barclay <alan@escribe.co.uk> for donating the original 26 * version of this code to Ghostscript. 27 */ 28 29 /* ------ The device descriptors ------ */ 30 31 /* Default X and Y resolution */ 32 #define X_DPI 72 33 #define Y_DPI 72 34 35 typedef struct gx_device_tiff_s { 36 gx_device_common; 37 gx_prn_device_common; 38 gdev_tiff_state tiff; 39 } gx_device_tiff; 40 41 private dev_proc_print_page(tiff12_print_page); 42 private dev_proc_print_page(tiff24_print_page); 43 44 private const gx_device_procs tiff12_procs = 45 prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close, 46 gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb); 47 private const gx_device_procs tiff24_procs = 48 prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close, 49 gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb); 50 51 const gx_device_printer gs_tiff12nc_device = { 52 prn_device_std_body(gx_device_tiff, tiff12_procs, "tiff12nc", 53 DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS, 54 X_DPI, Y_DPI, 55 0, 0, 0, 0, 56 24, tiff12_print_page) 57 }; 58 59 const gx_device_printer gs_tiff24nc_device = { 60 prn_device_std_body(gx_device_tiff, tiff24_procs, "tiff24nc", 61 DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS, 62 X_DPI, Y_DPI, 63 0, 0, 0, 0, 64 24, tiff24_print_page) 65 }; 66 67 /* ------ Private definitions ------ */ 68 69 /* Define our TIFF directory - sorted by tag number */ 70 typedef struct tiff_rgb_directory_s { 71 TIFF_dir_entry BitsPerSample; 72 TIFF_dir_entry Compression; 73 TIFF_dir_entry Photometric; 74 TIFF_dir_entry FillOrder; 75 TIFF_dir_entry SamplesPerPixel; 76 } tiff_rgb_directory; 77 typedef struct tiff_rgb_values_s { 78 TIFF_ushort bps[3]; 79 } tiff_rgb_values; 80 81 private const tiff_rgb_directory dir_rgb_template = 82 { 83 /* C's ridiculous rules about & and arrays require bps[0] here: */ 84 {TIFFTAG_BitsPerSample, TIFF_SHORT | TIFF_INDIRECT, 3, offset_of(tiff_rgb_values, bps[0])}, 85 {TIFFTAG_Compression, TIFF_SHORT, 1, Compression_none}, 86 {TIFFTAG_Photometric, TIFF_SHORT, 1, Photometric_RGB}, 87 {TIFFTAG_FillOrder, TIFF_SHORT, 1, FillOrder_MSB2LSB}, 88 {TIFFTAG_SamplesPerPixel, TIFF_SHORT, 1, 3}, 89 }; 90 91 private const tiff_rgb_values val_12_template = { 92 {4, 4, 4} 93 }; 94 95 private const tiff_rgb_values val_24_template = { 96 {8, 8, 8} 97 }; 98 99 /* ------ Private functions ------ */ 100 101 private int 102 tiff12_print_page(gx_device_printer * pdev, FILE * file) 103 { 104 gx_device_tiff *const tfdev = (gx_device_tiff *)pdev; 105 int code; 106 107 /* Write the page directory. */ 108 code = gdev_tiff_begin_page(pdev, &tfdev->tiff, file, 109 (const TIFF_dir_entry *)&dir_rgb_template, 110 sizeof(dir_rgb_template) / sizeof(TIFF_dir_entry), 111 (const byte *)&val_12_template, 112 sizeof(val_12_template), 0); 113 if (code < 0) 114 return code; 115 116 /* Write the page data. */ 117 { 118 int y; 119 int raster = gdev_prn_raster(pdev); 120 byte *line = gs_alloc_bytes(pdev->memory, raster, "tiff12_print_page"); 121 byte *row; 122 123 if (line == 0) 124 return_error(gs_error_VMerror); 125 126 for (y = 0; y < pdev->height; ++y) { 127 const byte *src; 128 byte *dest; 129 int x; 130 131 code = gdev_prn_get_bits(pdev, y, line, &row); 132 if (code < 0) 133 break; 134 135 for (src = row, dest = line, x = 0; x < raster; 136 src += 6, dest += 3, x += 6 137 ) { 138 dest[0] = (src[0] & 0xf0) | (src[1] >> 4); 139 dest[1] = (src[2] & 0xf0) | (src[3] >> 4); 140 dest[2] = (src[4] & 0xf0) | (src[5] >> 4); 141 } 142 fwrite(line, 1, (pdev->width * 3 + 1) >> 1, file); 143 } 144 145 gdev_tiff_end_strip(&tfdev->tiff, file); 146 gdev_tiff_end_page(&tfdev->tiff, file); 147 gs_free_object(pdev->memory, line, "tiff12_print_page"); 148 } 149 150 return code; 151 } 152 153 private int 154 tiff24_print_page(gx_device_printer * pdev, FILE * file) 155 { 156 gx_device_tiff *const tfdev = (gx_device_tiff *)pdev; 157 int code; 158 159 /* Write the page directory. */ 160 code = gdev_tiff_begin_page(pdev, &tfdev->tiff, file, 161 (const TIFF_dir_entry *)&dir_rgb_template, 162 sizeof(dir_rgb_template) / sizeof(TIFF_dir_entry), 163 (const byte *)&val_24_template, 164 sizeof(val_24_template), 0); 165 if (code < 0) 166 return code; 167 168 /* Write the page data. */ 169 { 170 int y; 171 int raster = gdev_prn_raster(pdev); 172 byte *line = gs_alloc_bytes(pdev->memory, raster, "tiff24_print_page"); 173 byte *row; 174 175 if (line == 0) 176 return_error(gs_error_VMerror); 177 for (y = 0; y < pdev->height; ++y) { 178 code = gdev_prn_get_bits(pdev, y, line, &row); 179 if (code < 0) 180 break; 181 fwrite((char *)row, raster, 1, file); 182 } 183 gdev_tiff_end_strip(&tfdev->tiff, file); 184 gdev_tiff_end_page(&tfdev->tiff, file); 185 gs_free_object(pdev->memory, line, "tiff24_print_page"); 186 } 187 188 return code; 189 } 190