| 1 | /* |
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| 2 | * libpipi Proper image processing implementation library |
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| 3 | * Copyright (c) 2004-2008 Sam Hocevar <sam@zoy.org> |
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| 4 | * All Rights Reserved |
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| 5 | * |
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| 6 | * $Id$ |
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| 7 | * |
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| 8 | * This library is free software. It comes without any warranty, to |
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| 9 | * the extent permitted by applicable law. You can redistribute it |
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| 10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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| 11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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| 12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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| 13 | */ |
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| 14 | |
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| 15 | /* |
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| 16 | * context.c: processing stack handling routines |
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| 17 | */ |
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| 18 | |
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| 19 | #include "config.h" |
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| 20 | #include "common.h" |
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| 21 | |
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| 22 | #include <stdio.h> |
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| 23 | #include <stdlib.h> |
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| 24 | #include <stdarg.h> |
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| 25 | #include <string.h> |
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| 26 | |
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| 27 | #include "pipi.h" |
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| 28 | #include "pipi_internals.h" |
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| 29 | |
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| 30 | pipi_context_t *pipi_create_context() |
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| 31 | { |
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| 32 | pipi_context_t *ret; |
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| 33 | |
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| 34 | ret = malloc(sizeof(pipi_context_t)); |
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| 35 | memset(ret, 0, sizeof(pipi_context_t)); |
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| 36 | |
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| 37 | return ret; |
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| 38 | } |
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| 39 | |
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| 40 | void pipi_destroy_context(pipi_context_t *ctx) |
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| 41 | { |
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| 42 | free(ctx); |
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| 43 | } |
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| 44 | |
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| 45 | int pipi_command(pipi_context_t *ctx, char const *cmd, ...) |
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| 46 | { |
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| 47 | if(!strcmp(cmd, "load")) |
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| 48 | { |
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| 49 | char const *file; |
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| 50 | va_list ap; |
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| 51 | |
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| 52 | va_start(ap, cmd); |
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| 53 | file = va_arg(ap, char const *); |
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| 54 | va_end(ap); |
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| 55 | ctx->images[ctx->nimages] = pipi_load(file); |
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| 56 | if(ctx->images[ctx->nimages] == NULL) |
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| 57 | return -1; |
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| 58 | ctx->nimages++; |
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| 59 | } |
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| 60 | else if(!strcmp(cmd, "save")) |
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| 61 | { |
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| 62 | char const *file; |
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| 63 | va_list ap; |
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| 64 | |
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| 65 | if(ctx->nimages <= 0) |
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| 66 | return -1; |
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| 67 | ctx->nimages--; |
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| 68 | va_start(ap, cmd); |
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| 69 | file = va_arg(ap, char const *); |
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| 70 | va_end(ap); |
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| 71 | pipi_save(ctx->images[ctx->nimages], file); |
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| 72 | pipi_free(ctx->images[ctx->nimages]); |
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| 73 | } |
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| 74 | else if(!strcmp(cmd, "dither")) |
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| 75 | { |
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| 76 | pipi_image_t *src, *dst; |
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| 77 | char const *method; |
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| 78 | va_list ap; |
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| 79 | |
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| 80 | if(ctx->nimages <= 0) |
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| 81 | return -1; |
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| 82 | va_start(ap, cmd); |
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| 83 | method = va_arg(ap, char const *); |
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| 84 | va_end(ap); |
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| 85 | src = ctx->images[ctx->nimages - 1]; |
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| 86 | dst = NULL; |
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| 87 | if(!strcmp(method, "fs")) |
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| 88 | dst = pipi_dither_floydsteinberg(src, 0); |
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| 89 | else if(!strcmp(method, "sfs")) |
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| 90 | dst = pipi_dither_floydsteinberg(src, 1); |
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| 91 | else if(!strcmp(method, "jajuni")) |
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| 92 | dst = pipi_dither_jajuni(src, 0); |
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| 93 | else if(!strcmp(method, "sjajuni")) |
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| 94 | dst = pipi_dither_jajuni(src, 1); |
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| 95 | else if(!strcmp(method, "ost")) |
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| 96 | dst = pipi_dither_ostromoukhov(src, 0); |
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| 97 | else if(!strcmp(method, "sost")) |
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| 98 | dst = pipi_dither_ostromoukhov(src, 1); |
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| 99 | else if(!strcmp(method, "ordered")) |
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| 100 | { |
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| 101 | if(ctx->nimages < 2) |
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| 102 | return -1; |
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| 103 | dst = pipi_dither_ordered(ctx->images[ctx->nimages - 2], src); |
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| 104 | pipi_free(ctx->images[ctx->nimages - 2]); |
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| 105 | ctx->nimages--; |
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| 106 | } |
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| 107 | else if(!strcmp(method, "random")) |
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| 108 | dst = pipi_dither_random(src); |
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| 109 | else if(!strcmp(method, "dbs")) |
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| 110 | dst = pipi_dither_dbs(src); |
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| 111 | if(dst == NULL) |
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| 112 | return -1; |
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| 113 | pipi_free(src); |
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| 114 | ctx->images[ctx->nimages - 1] = dst; |
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| 115 | } |
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| 116 | else if(!strcmp(cmd, "blur")) |
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| 117 | { |
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| 118 | pipi_image_t *src, *dst; |
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| 119 | char const *arg; |
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| 120 | va_list ap; |
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| 121 | |
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| 122 | if(ctx->nimages <= 0) |
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| 123 | return -1; |
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| 124 | va_start(ap, cmd); |
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| 125 | arg = va_arg(ap, char const *); |
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| 126 | va_end(ap); |
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| 127 | src = ctx->images[ctx->nimages - 1]; |
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| 128 | dst = pipi_gaussian_blur(src, atof(arg)); |
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| 129 | if(dst == NULL) |
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| 130 | return -1; |
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| 131 | pipi_free(src); |
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| 132 | ctx->images[ctx->nimages - 1] = dst; |
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| 133 | } |
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| 134 | else if(!strcmp(cmd, "wrap")) |
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| 135 | { |
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| 136 | if(ctx->nimages <= 0) |
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| 137 | return -1; |
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| 138 | ctx->images[ctx->nimages - 1]->wrap = 1; |
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| 139 | } |
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| 140 | else if(!strcmp(cmd, "gray")) |
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| 141 | { |
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| 142 | if(ctx->nimages <= 0) |
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| 143 | return -1; |
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| 144 | pipi_getpixels(ctx->images[ctx->nimages - 1], PIPI_PIXELS_Y_F); |
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| 145 | } |
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| 146 | else if(!strcmp(cmd, "free")) |
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| 147 | { |
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| 148 | if(ctx->nimages <= 0) |
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| 149 | return -1; |
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| 150 | ctx->nimages--; |
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| 151 | pipi_free(ctx->images[ctx->nimages]); |
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| 152 | } |
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| 153 | else if(!strcmp(cmd, "dup")) |
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| 154 | { |
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| 155 | if(ctx->nimages <= 0) |
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| 156 | return -1; |
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| 157 | ctx->images[ctx->nimages] = pipi_copy(ctx->images[ctx->nimages - 1]); |
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| 158 | ctx->nimages++; |
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| 159 | } |
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| 160 | else |
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| 161 | { |
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| 162 | return -1; |
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| 163 | } |
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| 164 | |
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| 165 | return 0; |
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| 166 | } |
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| 167 | |
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