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| 1 | +/**************************************************************************** |
| 2 | + * apps/graphics/jpgresizetool/resize.c |
| 3 | + * |
| 4 | + * SPDX-License-Identifier: Apache-2.0 |
| 5 | + * |
| 6 | + * Licensed to the Apache Software Foundation (ASF) under one or more |
| 7 | + * contributor license agreements. See the NOTICE file distributed with |
| 8 | + * this work for additional information regarding copyright ownership. The |
| 9 | + * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| 10 | + * "License"); you may not use this file except in compliance with the |
| 11 | + * License. You may obtain a copy of the License at |
| 12 | + * |
| 13 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 14 | + * |
| 15 | + * Unless required by applicable law or agreed to in writing, software |
| 16 | + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 17 | + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 18 | + * License for the specific language governing permissions and limitations |
| 19 | + * under the License. |
| 20 | + * |
| 21 | + ****************************************************************************/ |
| 22 | + |
| 23 | +/**************************************************************************** |
| 24 | + * Included Files |
| 25 | + ****************************************************************************/ |
| 26 | + |
| 27 | +#include <stdio.h> |
| 28 | +#include <stdlib.h> |
| 29 | +#include <jpeglib.h> |
| 30 | + |
| 31 | +/**************************************************************************** |
| 32 | + * Definitions |
| 33 | + ****************************************************************************/ |
| 34 | + |
| 35 | +/* Every N line, report resizing progress */ |
| 36 | +#define JPEGRESIZE_PROGRESS_INTERVAL 40 |
| 37 | + |
| 38 | +/**************************************************************************** |
| 39 | + * Public Functions |
| 40 | + ****************************************************************************/ |
| 41 | + |
| 42 | +/* Usage: jpgresize input.jpg output.jpg scale_denom quality% |
| 43 | + * scale_denom: 1, 2, 4, 8. Shrinks image by scale_denom times. |
| 44 | + * quality: 1% to 100%. 20% heavy compression, 80% nearly original. |
| 45 | + * thumbnail example: |
| 46 | + * jpgresize /sd/IMAGES/000000a1.jpg /sd/TEMP/THUMBS/000000a1.jpg 8 20 |
| 47 | + */ |
| 48 | + |
| 49 | +int main(int argc, char *argv[]) |
| 50 | +{ |
| 51 | + struct jpeg_compress_struct cinfo_out; |
| 52 | + struct jpeg_decompress_struct cinfo; |
| 53 | + struct jpeg_error_mgr jerr_out; |
| 54 | + struct jpeg_error_mgr jerr; |
| 55 | + const char *output_filename; |
| 56 | + const char *input_filename; |
| 57 | + uint8_t togglechar; |
| 58 | + JSAMPARRAY buffer; |
| 59 | + FILE *outfile; |
| 60 | + FILE *infile; |
| 61 | + int scale_denom; |
| 62 | + int pixel_size; |
| 63 | + int quality; |
| 64 | + int height; |
| 65 | + int width; |
| 66 | + |
| 67 | + /* Take arguments */ |
| 68 | + |
| 69 | + if (argc != 5) |
| 70 | + { |
| 71 | + fprintf(stderr, |
| 72 | + "Usage: %s input.jpg output.jpg scale_denom(1, 2, 4, 8) quality%%\n", |
| 73 | + argv[0]); |
| 74 | + return -1; |
| 75 | + } |
| 76 | + |
| 77 | + scale_denom = atoi(argv[3]); |
| 78 | + if (scale_denom != 1 && scale_denom != 2 && scale_denom != 4 && |
| 79 | + scale_denom != 8 && scale_denom != 16) |
| 80 | + { |
| 81 | + fprintf(stderr, "scale_denom must be 1, 2, 4 or 8\n"); |
| 82 | + return -1; |
| 83 | + } |
| 84 | + |
| 85 | + input_filename = argv[1]; |
| 86 | + output_filename = argv[2]; |
| 87 | + quality = atoi(argv[4]); |
| 88 | + |
| 89 | + /* Opening input */ |
| 90 | + |
| 91 | + infile = fopen(input_filename, "rb"); |
| 92 | + if (!infile) |
| 93 | + { |
| 94 | + perror("fopen input"); |
| 95 | + return -1; |
| 96 | + } |
| 97 | + |
| 98 | + /* Configuring decompressor */ |
| 99 | + |
| 100 | + cinfo.err = jpeg_std_error(&jerr); |
| 101 | + jpeg_create_decompress(&cinfo); |
| 102 | + jpeg_stdio_src(&cinfo, infile); |
| 103 | + jpeg_read_header(&cinfo, TRUE); |
| 104 | + |
| 105 | + cinfo.scale_num = 1; |
| 106 | + cinfo.scale_denom = scale_denom; |
| 107 | + jpeg_start_decompress(&cinfo); |
| 108 | + |
| 109 | + width = cinfo.output_width; |
| 110 | + height = cinfo.output_height; |
| 111 | + pixel_size = cinfo.output_components; |
| 112 | + |
| 113 | + /* Opening output */ |
| 114 | + |
| 115 | + outfile = fopen(output_filename, "wb"); |
| 116 | + if (!outfile) |
| 117 | + { |
| 118 | + perror("fopen output"); |
| 119 | + jpeg_destroy_decompress(&cinfo); |
| 120 | + fclose(infile); |
| 121 | + return -1; |
| 122 | + } |
| 123 | + |
| 124 | + /* Configuring compressor */ |
| 125 | + |
| 126 | + cinfo_out.err = jpeg_std_error(&jerr_out); |
| 127 | + jpeg_create_compress(&cinfo_out); |
| 128 | + jpeg_stdio_dest(&cinfo_out, outfile); |
| 129 | + |
| 130 | + cinfo_out.image_width = width; |
| 131 | + cinfo_out.image_height = height; |
| 132 | + cinfo_out.input_components = pixel_size; |
| 133 | + cinfo_out.in_color_space = cinfo.out_color_space; |
| 134 | + jpeg_set_defaults(&cinfo_out); |
| 135 | + jpeg_set_quality(&cinfo_out, quality, TRUE); |
| 136 | + jpeg_start_compress(&cinfo_out, TRUE); |
| 137 | + |
| 138 | + /* Allocating memory by using JPEG their own allocator. Do not use malloc */ |
| 139 | + |
| 140 | + printf("Allocating... \r"); |
| 141 | + buffer = (*cinfo.mem->alloc_sarray) |
| 142 | + ((j_common_ptr)&cinfo, JPOOL_IMAGE, width * pixel_size, 1); |
| 143 | + |
| 144 | + /* Start the job */ |
| 145 | + |
| 146 | + printf("Resizing... \n"); |
| 147 | + togglechar = 0; |
| 148 | + while (cinfo.output_scanline < cinfo.output_height) |
| 149 | + { |
| 150 | + /* Pretty loading bar... */ |
| 151 | + |
| 152 | + if (cinfo.output_scanline % JPEGRESIZE_PROGRESS_INTERVAL == 1) |
| 153 | + { |
| 154 | + printf("\r[%u%%]", |
| 155 | + (unsigned)(((float)cinfo.output_scanline |
| 156 | + / cinfo.output_height) |
| 157 | + * 100)); |
| 158 | + togglechar = !togglechar; |
| 159 | + } |
| 160 | + |
| 161 | + if (togglechar) |
| 162 | + { |
| 163 | + printf("-"); |
| 164 | + } |
| 165 | + else |
| 166 | + { |
| 167 | + printf("#"); |
| 168 | + } |
| 169 | + |
| 170 | + fflush(stdout); |
| 171 | + |
| 172 | + /* Actual work */ |
| 173 | + |
| 174 | + jpeg_read_scanlines(&cinfo, buffer, 1); |
| 175 | + jpeg_write_scanlines(&cinfo_out, buffer, 1); |
| 176 | + } |
| 177 | + |
| 178 | + /* Erase progress bar */ |
| 179 | + |
| 180 | + printf("\r "); |
| 181 | + for (size_t i = 0; i < JPEGRESIZE_PROGRESS_INTERVAL; i++) |
| 182 | + { |
| 183 | + printf(" "); |
| 184 | + } |
| 185 | + |
| 186 | + /* All done */ |
| 187 | + |
| 188 | + printf("\rDone\n"); |
| 189 | + |
| 190 | + jpeg_finish_compress(&cinfo_out); |
| 191 | + jpeg_destroy_compress(&cinfo_out); |
| 192 | + fclose(outfile); |
| 193 | + |
| 194 | + jpeg_finish_decompress(&cinfo); |
| 195 | + jpeg_destroy_decompress(&cinfo); |
| 196 | + fclose(infile); |
| 197 | + |
| 198 | + printf("Resized JPEG written to %s\n", output_filename); |
| 199 | + return 0; |
| 200 | +} |
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