OLD | NEW |
(Empty) | |
| 1 /* |
| 2 * Copyright (C)2011 D. R. Commander. All Rights Reserved. |
| 3 * |
| 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are met: |
| 6 * |
| 7 * - Redistributions of source code must retain the above copyright notice, |
| 8 * this list of conditions and the following disclaimer. |
| 9 * - Redistributions in binary form must reproduce the above copyright notice, |
| 10 * this list of conditions and the following disclaimer in the documentation |
| 11 * and/or other materials provided with the distribution. |
| 12 * - Neither the name of the libjpeg-turbo Project nor the names of its |
| 13 * contributors may be used to endorse or promote products derived from this |
| 14 * software without specific prior written permission. |
| 15 * |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS", |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 * POSSIBILITY OF SUCH DAMAGE. |
| 27 */ |
| 28 |
| 29 /* This program demonstrates how to check for the colorspace extension |
| 30 capabilities of libjpeg-turbo at both compile time and run time. */ |
| 31 |
| 32 #include <stdio.h> |
| 33 #include <jpeglib.h> |
| 34 #include <jerror.h> |
| 35 #include <setjmp.h> |
| 36 |
| 37 #ifndef JCS_EXTENSIONS |
| 38 #define JCS_EXT_RGB 6 |
| 39 #endif |
| 40 #if !defined(JCS_EXTENSIONS) || !defined(JCS_ALPHA_EXTENSIONS) |
| 41 #define JCS_EXT_RGBA 12 |
| 42 #endif |
| 43 |
| 44 static char lasterror[JMSG_LENGTH_MAX] = "No error"; |
| 45 |
| 46 typedef struct _error_mgr { |
| 47 struct jpeg_error_mgr pub; |
| 48 jmp_buf jb; |
| 49 } error_mgr; |
| 50 |
| 51 static void my_error_exit(j_common_ptr cinfo) |
| 52 { |
| 53 error_mgr *myerr = (error_mgr *)cinfo->err; |
| 54 (*cinfo->err->output_message)(cinfo); |
| 55 longjmp(myerr->jb, 1); |
| 56 } |
| 57 |
| 58 static void my_output_message(j_common_ptr cinfo) |
| 59 { |
| 60 (*cinfo->err->format_message)(cinfo, lasterror); |
| 61 } |
| 62 |
| 63 int main(void) |
| 64 { |
| 65 int jcs_valid = -1, jcs_alpha_valid = -1; |
| 66 struct jpeg_compress_struct cinfo; |
| 67 error_mgr jerr; |
| 68 |
| 69 printf("libjpeg-turbo colorspace extensions:\n"); |
| 70 #if JCS_EXTENSIONS |
| 71 printf(" Present at compile time\n"); |
| 72 #else |
| 73 printf(" Not present at compile time\n"); |
| 74 #endif |
| 75 |
| 76 cinfo.err = jpeg_std_error(&jerr.pub); |
| 77 jerr.pub.error_exit = my_error_exit; |
| 78 jerr.pub.output_message = my_output_message; |
| 79 |
| 80 if(setjmp(jerr.jb)) { |
| 81 /* this will execute if libjpeg has an error */ |
| 82 jcs_valid = 0; |
| 83 goto done; |
| 84 } |
| 85 |
| 86 jpeg_create_compress(&cinfo); |
| 87 cinfo.input_components = 3; |
| 88 jpeg_set_defaults(&cinfo); |
| 89 cinfo.in_color_space = JCS_EXT_RGB; |
| 90 jpeg_default_colorspace(&cinfo); |
| 91 jcs_valid = 1; |
| 92 |
| 93 done: |
| 94 if (jcs_valid) |
| 95 printf(" Working properly\n"); |
| 96 else |
| 97 printf(" Not working properly. Error returned was:\n %s\n", |
| 98 lasterror); |
| 99 |
| 100 printf("libjpeg-turbo alpha colorspace extensions:\n"); |
| 101 #if JCS_ALPHA_EXTENSIONS |
| 102 printf(" Present at compile time\n"); |
| 103 #else |
| 104 printf(" Not present at compile time\n"); |
| 105 #endif |
| 106 |
| 107 if(setjmp(jerr.jb)) { |
| 108 /* this will execute if libjpeg has an error */ |
| 109 jcs_alpha_valid = 0; |
| 110 goto done2; |
| 111 } |
| 112 |
| 113 cinfo.in_color_space = JCS_EXT_RGBA; |
| 114 jpeg_default_colorspace(&cinfo); |
| 115 jcs_alpha_valid = 1; |
| 116 |
| 117 done2: |
| 118 if (jcs_alpha_valid) |
| 119 printf(" Working properly\n"); |
| 120 else |
| 121 printf(" Not working properly. Error returned was:\n %s\n", |
| 122 lasterror); |
| 123 |
| 124 jpeg_destroy_compress(&cinfo); |
| 125 return 0; |
| 126 } |
OLD | NEW |