1 | /* |
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2 | * libpipi Pathetic image processing interface 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 | |
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21 | #include <stdio.h> |
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22 | #include <stdlib.h> |
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23 | #include <stdarg.h> |
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24 | #include <string.h> |
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25 | |
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26 | #include "pipi.h" |
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27 | #include "pipi_internals.h" |
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28 | |
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29 | pipi_context_t *pipi_create_context() |
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30 | { |
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31 | pipi_context_t *ret; |
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32 | |
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33 | ret = malloc(sizeof(pipi_context_t)); |
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34 | memset(ret, 0, sizeof(pipi_context_t)); |
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35 | |
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36 | return ret; |
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37 | } |
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38 | |
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39 | void pipi_destroy_context(pipi_context_t *ctx) |
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40 | { |
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41 | free(ctx); |
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42 | } |
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43 | |
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44 | pipi_command_t const *pipi_get_command_list(void) |
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45 | { |
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46 | static pipi_command_t const list[] = |
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47 | { |
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48 | { "load", 1 }, |
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49 | { "save", 1 }, |
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50 | |
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51 | { "dup", 0 }, |
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52 | { "swap", 0 }, |
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53 | { "roll", 1 }, |
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54 | |
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55 | { "gamma", 1 }, |
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56 | { "scale", 1 }, |
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57 | { "crop", 1 }, |
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58 | { "geometry", 1 }, |
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59 | { "tile", 1 }, |
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60 | { "dither", 1 }, |
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61 | { "blur", 1 }, |
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62 | { "boxblur", 1 }, |
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63 | { "median", 1 }, |
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64 | { "gray", 0 }, |
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65 | { "brightness", 1 }, |
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66 | { "contrast", 1 }, |
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67 | { "autocontrast", 0 }, |
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68 | { "order", 0 }, |
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69 | { "hflip", 0 }, |
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70 | { "vflip", 0 }, |
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71 | { "rotate90", 0 }, |
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72 | { "rotate180", 0 }, |
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73 | { "rotate270", 0 }, |
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74 | { "rotate", 1 }, |
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75 | { "invert", 0 }, |
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76 | { "threshold", 1 }, |
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77 | { "dilate", 0 }, |
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78 | { "erode", 0 }, |
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79 | { "wrap", 0 }, |
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80 | { "combine", 0 }, |
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81 | { "split", 0 }, |
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82 | { "mean", 0 }, |
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83 | { "merge", 1 }, |
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84 | { "min", 0 }, |
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85 | { "max", 0 }, |
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86 | { "add", 0 }, |
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87 | { "sub", 0 }, |
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88 | { "difference", 0 }, |
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89 | { "multiply", 0 }, |
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90 | { "divide", 0 }, |
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91 | { "screen", 0 }, |
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92 | { "overlay", 0 }, |
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93 | { "line", 1 }, |
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94 | { "sine", 1 }, |
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95 | { "wave", 1 }, |
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96 | |
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97 | /* End marker */ |
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98 | { NULL, 0 } |
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99 | }; |
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100 | |
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101 | return list; |
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102 | } |
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103 | |
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104 | int pipi_command(pipi_context_t *ctx, char const *cmd, ...) |
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105 | { |
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106 | if(!strcmp(cmd, "load")) |
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107 | { |
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108 | char const *file; |
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109 | va_list ap; |
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110 | |
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111 | va_start(ap, cmd); |
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112 | file = va_arg(ap, char const *); |
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113 | va_end(ap); |
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114 | ctx->images[ctx->nimages] = pipi_load(file); |
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115 | if(ctx->images[ctx->nimages] == NULL) |
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116 | return -1; |
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117 | ctx->nimages++; |
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118 | } |
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119 | else if(!strcmp(cmd, "save")) |
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120 | { |
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121 | char const *file; |
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122 | va_list ap; |
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123 | |
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124 | if(ctx->nimages < 1) |
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125 | return -1; |
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126 | ctx->nimages--; |
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127 | va_start(ap, cmd); |
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128 | file = va_arg(ap, char const *); |
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129 | va_end(ap); |
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130 | pipi_save(ctx->images[ctx->nimages], file); |
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131 | pipi_free(ctx->images[ctx->nimages]); |
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132 | } |
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133 | else if(!strcmp(cmd, "gamma")) |
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134 | { |
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135 | char const *val; |
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136 | va_list ap; |
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137 | |
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138 | va_start(ap, cmd); |
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139 | val = va_arg(ap, char const *); |
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140 | va_end(ap); |
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141 | |
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142 | pipi_set_gamma(atof(val)); |
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143 | } |
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144 | else if(!strcmp(cmd, "dither")) |
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145 | { |
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146 | pipi_image_t *src, *dst; |
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147 | char const *method; |
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148 | va_list ap; |
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149 | |
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150 | if(ctx->nimages < 1) |
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151 | return -1; |
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152 | va_start(ap, cmd); |
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153 | method = va_arg(ap, char const *); |
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154 | va_end(ap); |
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155 | src = ctx->images[ctx->nimages - 1]; |
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156 | dst = NULL; |
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157 | if(!strcmp(method, "ost")) |
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158 | dst = pipi_dither_ostromoukhov(src, 0); |
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159 | else if(!strcmp(method, "sost")) |
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160 | dst = pipi_dither_ostromoukhov(src, 1); |
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161 | else if(!strcmp(method, "ediff")) |
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162 | { |
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163 | if(ctx->nimages < 2) |
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164 | return -1; |
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165 | dst = pipi_dither_ediff(ctx->images[ctx->nimages - 2], src, 0); |
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166 | pipi_free(ctx->images[ctx->nimages - 2]); |
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167 | ctx->nimages--; |
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168 | } |
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169 | else if(!strcmp(method, "sediff")) |
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170 | { |
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171 | if(ctx->nimages < 2) |
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172 | return -1; |
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173 | dst = pipi_dither_ediff(ctx->images[ctx->nimages - 2], src, 1); |
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174 | pipi_free(ctx->images[ctx->nimages - 2]); |
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175 | ctx->nimages--; |
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176 | } |
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177 | else if(!strncmp(method, "ordered", 7)) |
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178 | { |
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179 | double scale = 1., angle = .0; |
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180 | if(ctx->nimages < 2) |
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181 | return -1; |
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182 | method = strchr(method, ':'); |
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183 | if(method) |
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184 | { |
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185 | scale = atof(method + 1); |
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186 | method = strchr(method + 1, ':'); |
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187 | if(method) |
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188 | angle = atof(method + 1); |
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189 | } |
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190 | if(scale <= 0.) |
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191 | scale = 1.; |
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192 | dst = pipi_dither_ordered_ext(ctx->images[ctx->nimages - 2], src, |
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193 | scale, angle); |
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194 | pipi_free(ctx->images[ctx->nimages - 2]); |
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195 | ctx->nimages--; |
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196 | } |
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197 | else if(!strncmp(method, "halftone", 8)) |
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198 | { |
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199 | double r, angle = .0; |
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200 | method = strchr(method, ':'); |
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201 | if(!method) |
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202 | return -1; |
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203 | r = atof(method + 1); |
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204 | method = strchr(method + 1, ':'); |
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205 | if(method) |
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206 | angle = atof(method + 1); |
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207 | if(r < 1.) |
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208 | r = 1.; |
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209 | dst = pipi_dither_halftone(src, r, angle); |
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210 | } |
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211 | else if(!strcmp(method, "random")) |
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212 | dst = pipi_dither_random(src); |
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213 | else if(!strcmp(method, "dbs")) |
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214 | dst = pipi_dither_dbs(src); |
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215 | if(dst == NULL) |
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216 | return -1; |
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217 | pipi_free(src); |
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218 | ctx->images[ctx->nimages - 1] = dst; |
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219 | } |
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220 | else if(!strcmp(cmd, "blur")) |
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221 | { |
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222 | pipi_image_t *src, *dst; |
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223 | char const *arg; |
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224 | va_list ap; |
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225 | double w, h, a = 0.0; |
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226 | |
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227 | if(ctx->nimages < 1) |
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228 | return -1; |
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229 | va_start(ap, cmd); |
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230 | arg = va_arg(ap, char const *); |
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231 | va_end(ap); |
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232 | w = h = atof(arg); |
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233 | arg = strchr(arg, 'x'); |
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234 | if(arg) |
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235 | { |
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236 | h = atof(arg + 1); |
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237 | arg = strchr(arg, 'r'); |
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238 | if(arg) |
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239 | a = atof(arg + 1); |
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240 | } |
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241 | src = ctx->images[ctx->nimages - 1]; |
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242 | dst = pipi_gaussian_blur_ext(src, w, h, a, 0.0, 0.0); |
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243 | if(dst == NULL) |
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244 | return -1; |
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245 | pipi_free(src); |
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246 | ctx->images[ctx->nimages - 1] = dst; |
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247 | } |
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248 | else if(!strcmp(cmd, "boxblur") || !strcmp(cmd, "median")) |
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249 | { |
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250 | pipi_image_t *src, *dst = NULL; |
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251 | char const *arg; |
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252 | va_list ap; |
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253 | double w, h; |
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254 | |
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255 | if(ctx->nimages < 1) |
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256 | return -1; |
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257 | va_start(ap, cmd); |
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258 | arg = va_arg(ap, char const *); |
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259 | va_end(ap); |
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260 | w = h = atof(arg); |
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261 | arg = strchr(arg, 'x'); |
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262 | if(arg) |
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263 | h = atof(arg + 1); |
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264 | src = ctx->images[ctx->nimages - 1]; |
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265 | switch(cmd[0]) |
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266 | { |
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267 | case 'b': dst = pipi_box_blur_ext(src, w, h); break; |
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268 | case 'm': dst = pipi_median_ext(src, w, h); break; |
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269 | } |
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270 | if(dst == NULL) |
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271 | return -1; |
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272 | pipi_free(src); |
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273 | ctx->images[ctx->nimages - 1] = dst; |
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274 | } |
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275 | else if(!strcmp(cmd, "geometry") || !strcmp(cmd, "tile")) |
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276 | { |
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277 | pipi_image_t *src, *dst = NULL; |
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278 | char const *arg; |
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279 | va_list ap; |
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280 | int w, h; |
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281 | |
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282 | if(ctx->nimages < 1) |
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283 | return -1; |
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284 | va_start(ap, cmd); |
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285 | arg = va_arg(ap, char const *); |
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286 | va_end(ap); |
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287 | w = atoi(arg); |
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288 | arg = strchr(arg, 'x'); |
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289 | if(!arg) |
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290 | return -1; |
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291 | h = atoi(arg + 1); |
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292 | if(w <= 0 || h <= 0) |
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293 | return -1; |
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294 | src = ctx->images[ctx->nimages - 1]; |
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295 | switch(cmd[0]) |
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296 | { |
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297 | case 'g': dst = pipi_resize(src, w, h); break; |
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298 | case 't': dst = pipi_tile(src, w, h); break; |
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299 | } |
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300 | if(dst == NULL) |
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301 | return -1; |
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302 | pipi_free(src); |
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303 | ctx->images[ctx->nimages - 1] = dst; |
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304 | } |
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305 | else if(!strcmp(cmd, "scale")) |
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306 | { |
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307 | pipi_image_t *src, *dst; |
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308 | char const *arg; |
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309 | va_list ap; |
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310 | double scale; |
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311 | int w, h; |
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312 | |
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313 | if(ctx->nimages < 1) |
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314 | return -1; |
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315 | src = ctx->images[ctx->nimages - 1]; |
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316 | va_start(ap, cmd); |
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317 | arg = va_arg(ap, char const *); |
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318 | va_end(ap); |
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319 | scale = atof(arg); |
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320 | w = (int)(scale * src->w + 0.5); |
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321 | h = (int)(scale * src->h + 0.5); |
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322 | if(w <= 0 || h <= 0) |
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323 | return -1; |
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324 | dst = pipi_resize(src, w, h); |
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325 | if(dst == NULL) |
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326 | return -1; |
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327 | pipi_free(src); |
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328 | ctx->images[ctx->nimages - 1] = dst; |
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329 | } |
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330 | else if(!strcmp(cmd, "crop")) |
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331 | { |
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332 | pipi_image_t *tmp; |
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333 | char const *arg; |
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334 | va_list ap; |
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335 | int w, h, x = 0, y = 0; |
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336 | int ret; |
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337 | |
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338 | if(ctx->nimages < 1) |
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339 | return -1; |
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340 | |
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341 | va_start(ap, cmd); |
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342 | arg = va_arg(ap, char const *); |
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343 | va_end(ap); |
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344 | |
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345 | ret = sscanf(arg, "%dx%d+%d+%d", &w, &h, &x, &y); |
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346 | if(ret < 2) |
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347 | return -1; |
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348 | |
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349 | tmp = ctx->images[ctx->nimages - 1]; |
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350 | ctx->images[ctx->nimages - 1] = pipi_crop(tmp, w, h, x, y); |
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351 | pipi_free(tmp); |
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352 | } |
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353 | else if(!strcmp(cmd, "brightness") || !strcmp(cmd, "contrast") |
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354 | || !strcmp(cmd, "threshold") || !strcmp(cmd, "rotate")) |
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355 | { |
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356 | pipi_image_t *src, *dst = NULL; |
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357 | char const *arg; |
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358 | va_list ap; |
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359 | double val; |
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360 | |
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361 | if(ctx->nimages < 1) |
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362 | return -1; |
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363 | va_start(ap, cmd); |
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364 | arg = va_arg(ap, char const *); |
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365 | va_end(ap); |
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366 | val = atof(arg); |
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367 | src = ctx->images[ctx->nimages - 1]; |
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368 | switch(cmd[0]) |
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369 | { |
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370 | case 'b': dst = pipi_brightness(src, val); break; |
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371 | case 'c': dst = pipi_contrast(src, val); break; |
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372 | case 'r': dst = pipi_rotate(src, val); break; |
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373 | case 't': dst = pipi_threshold(src, val); break; |
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374 | } |
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375 | if(dst == NULL) |
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376 | return -1; |
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377 | pipi_free(src); |
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378 | ctx->images[ctx->nimages - 1] = dst; |
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379 | } |
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380 | else if(!strcmp(cmd, "hflip")) |
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381 | { |
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382 | pipi_image_t *tmp; |
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383 | if(ctx->nimages < 1) |
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384 | return -1; |
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385 | tmp = ctx->images[ctx->nimages - 1]; |
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386 | ctx->images[ctx->nimages - 1] = pipi_hflip(tmp); |
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387 | pipi_free(tmp); |
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388 | } |
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389 | else if(!strcmp(cmd, "vflip")) |
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390 | { |
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391 | pipi_image_t *tmp; |
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392 | if(ctx->nimages < 1) |
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393 | return -1; |
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394 | tmp = ctx->images[ctx->nimages - 1]; |
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395 | ctx->images[ctx->nimages - 1] = pipi_vflip(tmp); |
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396 | pipi_free(tmp); |
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397 | } |
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398 | else if(!strcmp(cmd, "rotate90")) |
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399 | { |
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400 | pipi_image_t *tmp; |
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401 | if(ctx->nimages < 1) |
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402 | return -1; |
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403 | tmp = ctx->images[ctx->nimages - 1]; |
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404 | ctx->images[ctx->nimages - 1] = pipi_rotate90(tmp); |
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405 | pipi_free(tmp); |
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406 | } |
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407 | else if(!strcmp(cmd, "rotate180")) |
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408 | { |
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409 | pipi_image_t *tmp; |
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410 | if(ctx->nimages < 1) |
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411 | return -1; |
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412 | tmp = ctx->images[ctx->nimages - 1]; |
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413 | ctx->images[ctx->nimages - 1] = pipi_rotate180(tmp); |
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414 | pipi_free(tmp); |
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415 | } |
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416 | else if(!strcmp(cmd, "rotate270")) |
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417 | { |
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418 | pipi_image_t *tmp; |
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419 | if(ctx->nimages < 1) |
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420 | return -1; |
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421 | tmp = ctx->images[ctx->nimages - 1]; |
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422 | ctx->images[ctx->nimages - 1] = pipi_rotate270(tmp); |
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423 | pipi_free(tmp); |
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424 | } |
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425 | else if(!strcmp(cmd, "order")) |
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426 | { |
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427 | pipi_image_t *tmp; |
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428 | if(ctx->nimages < 1) |
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429 | return -1; |
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430 | tmp = ctx->images[ctx->nimages - 1]; |
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431 | ctx->images[ctx->nimages - 1] = pipi_order(tmp); |
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432 | pipi_free(tmp); |
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433 | } |
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434 | else if(!strcmp(cmd, "split")) |
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435 | { |
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436 | pipi_image_t *src; |
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437 | |
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438 | if(ctx->nimages < 1) |
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439 | return -1; |
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440 | src = ctx->images[ctx->nimages - 1]; |
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441 | ctx->nimages += 2; |
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442 | ctx->images[ctx->nimages - 3] = pipi_red(src); |
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443 | ctx->images[ctx->nimages - 2] = pipi_green(src); |
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444 | ctx->images[ctx->nimages - 1] = pipi_blue(src); |
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445 | pipi_free(src); |
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446 | } |
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447 | else if(!strcmp(cmd, "combine")) |
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448 | { |
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449 | pipi_image_t *dst; |
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450 | |
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451 | if(ctx->nimages < 3) |
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452 | return -1; |
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453 | dst = pipi_rgb(ctx->images[ctx->nimages - 3], |
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454 | ctx->images[ctx->nimages - 2], |
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455 | ctx->images[ctx->nimages - 1]); |
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456 | if(dst == NULL) |
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457 | return -1; |
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458 | pipi_free(ctx->images[ctx->nimages - 3]); |
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459 | pipi_free(ctx->images[ctx->nimages - 2]); |
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460 | pipi_free(ctx->images[ctx->nimages - 1]); |
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461 | ctx->images[ctx->nimages - 3] = dst; |
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462 | ctx->nimages -= 2; |
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463 | } |
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464 | else if(!strcmp(cmd, "merge")) |
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465 | { |
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466 | pipi_image_t *dst; |
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467 | char const *arg; |
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468 | va_list ap; |
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469 | double val; |
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470 | |
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471 | if(ctx->nimages < 2) |
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472 | return -1; |
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473 | |
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474 | va_start(ap, cmd); |
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475 | arg = va_arg(ap, char const *); |
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476 | va_end(ap); |
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477 | val = atof(arg); |
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478 | |
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479 | dst = pipi_merge(ctx->images[ctx->nimages - 2], |
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480 | ctx->images[ctx->nimages - 1], val); |
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481 | if(dst == NULL) |
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482 | return -1; |
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483 | pipi_free(ctx->images[ctx->nimages - 2]); |
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484 | pipi_free(ctx->images[ctx->nimages - 1]); |
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485 | ctx->images[ctx->nimages - 2] = dst; |
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486 | ctx->nimages--; |
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487 | } |
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488 | else if(!strcmp(cmd, "mean") || !strcmp(cmd, "min") || !strcmp(cmd, "max") |
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489 | || !strcmp(cmd, "add") || !strcmp(cmd, "sub") |
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490 | || !strcmp(cmd, "difference") || !strcmp(cmd, "multiply") |
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491 | || !strcmp(cmd, "divide") || !strcmp(cmd, "screen") |
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492 | || !strcmp(cmd, "overlay")) |
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493 | { |
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494 | pipi_image_t *dst = NULL; |
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495 | |
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496 | if(ctx->nimages < 2) |
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497 | return -1; |
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498 | switch(cmd[2]) |
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499 | { |
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500 | case 'a': dst = pipi_mean(ctx->images[ctx->nimages - 2], |
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501 | ctx->images[ctx->nimages - 1]); |
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502 | break; |
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503 | case 'n': dst = pipi_min(ctx->images[ctx->nimages - 2], |
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504 | ctx->images[ctx->nimages - 1]); |
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505 | break; |
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506 | case 'x': dst = pipi_max(ctx->images[ctx->nimages - 2], |
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507 | ctx->images[ctx->nimages - 1]); |
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508 | break; |
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509 | case 'd': dst = pipi_add(ctx->images[ctx->nimages - 2], |
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510 | ctx->images[ctx->nimages - 1]); |
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511 | break; |
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512 | case 'b': dst = pipi_sub(ctx->images[ctx->nimages - 2], |
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513 | ctx->images[ctx->nimages - 1]); |
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514 | break; |
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515 | case 'f': dst = pipi_difference(ctx->images[ctx->nimages - 2], |
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516 | ctx->images[ctx->nimages - 1]); |
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517 | break; |
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518 | case 'l': dst = pipi_multiply(ctx->images[ctx->nimages - 2], |
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519 | ctx->images[ctx->nimages - 1]); |
---|
520 | break; |
---|
521 | case 'v': dst = pipi_divide(ctx->images[ctx->nimages - 2], |
---|
522 | ctx->images[ctx->nimages - 1]); |
---|
523 | break; |
---|
524 | case 'r': dst = pipi_screen(ctx->images[ctx->nimages - 2], |
---|
525 | ctx->images[ctx->nimages - 1]); |
---|
526 | break; |
---|
527 | case 'e': dst = pipi_overlay(ctx->images[ctx->nimages - 2], |
---|
528 | ctx->images[ctx->nimages - 1]); |
---|
529 | break; |
---|
530 | } |
---|
531 | if(dst == NULL) |
---|
532 | return -1; |
---|
533 | pipi_free(ctx->images[ctx->nimages - 2]); |
---|
534 | pipi_free(ctx->images[ctx->nimages - 1]); |
---|
535 | ctx->images[ctx->nimages - 2] = dst; |
---|
536 | ctx->nimages--; |
---|
537 | } |
---|
538 | else if(!strcmp(cmd, "wrap")) |
---|
539 | { |
---|
540 | if(ctx->nimages < 1) |
---|
541 | return -1; |
---|
542 | ctx->images[ctx->nimages - 1]->wrap = 1; |
---|
543 | } |
---|
544 | else if(!strcmp(cmd, "autocontrast")) |
---|
545 | { |
---|
546 | pipi_image_t *tmp; |
---|
547 | if(ctx->nimages < 1) |
---|
548 | return -1; |
---|
549 | tmp = ctx->images[ctx->nimages - 1]; |
---|
550 | ctx->images[ctx->nimages - 1] = pipi_autocontrast(tmp); |
---|
551 | pipi_free(tmp); |
---|
552 | } |
---|
553 | else if(!strcmp(cmd, "invert")) |
---|
554 | { |
---|
555 | pipi_image_t *tmp; |
---|
556 | if(ctx->nimages < 1) |
---|
557 | return -1; |
---|
558 | tmp = ctx->images[ctx->nimages - 1]; |
---|
559 | ctx->images[ctx->nimages - 1] = pipi_invert(tmp); |
---|
560 | pipi_free(tmp); |
---|
561 | } |
---|
562 | else if(!strcmp(cmd, "dilate")) |
---|
563 | { |
---|
564 | pipi_image_t *tmp; |
---|
565 | if(ctx->nimages < 1) |
---|
566 | return -1; |
---|
567 | tmp = ctx->images[ctx->nimages - 1]; |
---|
568 | ctx->images[ctx->nimages - 1] = pipi_dilate(tmp); |
---|
569 | pipi_free(tmp); |
---|
570 | } |
---|
571 | else if(!strcmp(cmd, "erode")) |
---|
572 | { |
---|
573 | pipi_image_t *tmp; |
---|
574 | if(ctx->nimages < 1) |
---|
575 | return -1; |
---|
576 | tmp = ctx->images[ctx->nimages - 1]; |
---|
577 | ctx->images[ctx->nimages - 1] = pipi_erode(tmp); |
---|
578 | pipi_free(tmp); |
---|
579 | } |
---|
580 | else if(!strcmp(cmd, "gray")) |
---|
581 | { |
---|
582 | if(ctx->nimages < 1) |
---|
583 | return -1; |
---|
584 | pipi_get_pixels(ctx->images[ctx->nimages - 1], PIPI_PIXELS_Y_F32); |
---|
585 | } |
---|
586 | else if(!strcmp(cmd, "free")) |
---|
587 | { |
---|
588 | if(ctx->nimages < 1) |
---|
589 | return -1; |
---|
590 | ctx->nimages--; |
---|
591 | pipi_free(ctx->images[ctx->nimages]); |
---|
592 | } |
---|
593 | else if(!strcmp(cmd, "dup")) |
---|
594 | { |
---|
595 | if(ctx->nimages < 1) |
---|
596 | return -1; |
---|
597 | ctx->images[ctx->nimages] = pipi_copy(ctx->images[ctx->nimages - 1]); |
---|
598 | ctx->nimages++; |
---|
599 | } |
---|
600 | else if(!strcmp(cmd, "swap")) |
---|
601 | { |
---|
602 | pipi_image_t *tmp; |
---|
603 | if(ctx->nimages < 2) |
---|
604 | return -1; |
---|
605 | tmp = ctx->images[ctx->nimages - 1]; |
---|
606 | ctx->images[ctx->nimages - 1] = ctx->images[ctx->nimages - 2]; |
---|
607 | ctx->images[ctx->nimages - 2] = tmp; |
---|
608 | } |
---|
609 | else if(!strcmp(cmd, "roll")) |
---|
610 | { |
---|
611 | pipi_image_t *tmp; |
---|
612 | char const *arg; |
---|
613 | va_list ap; |
---|
614 | int val; |
---|
615 | |
---|
616 | va_start(ap, cmd); |
---|
617 | arg = va_arg(ap, char const *); |
---|
618 | va_end(ap); |
---|
619 | val = atoi(arg); |
---|
620 | if(val <= 0 || ctx->nimages < val) |
---|
621 | return -1; |
---|
622 | if(val == 1) |
---|
623 | return 0; |
---|
624 | tmp = ctx->images[ctx->nimages - val]; |
---|
625 | memmove(ctx->images + ctx->nimages - val, |
---|
626 | ctx->images + ctx->nimages - val + 1, |
---|
627 | (val - 1) * sizeof(*ctx->images)); |
---|
628 | ctx->images[ctx->nimages - 1] = tmp; |
---|
629 | } |
---|
630 | else if(!strcmp(cmd, "line")) |
---|
631 | { |
---|
632 | char const *arg; |
---|
633 | va_list ap; |
---|
634 | int x1, y1, x2, y2, aa = 0, ret; |
---|
635 | uint32_t color = 0; |
---|
636 | |
---|
637 | if(ctx->nimages < 1) |
---|
638 | return -1; |
---|
639 | |
---|
640 | va_start(ap, cmd); |
---|
641 | arg = va_arg(ap, char const *); |
---|
642 | va_end(ap); |
---|
643 | |
---|
644 | ret = sscanf(arg, "%d,%d,%d,%d,%08x,%d", |
---|
645 | &x1, &y1, &x2, &y2, &color, &aa); |
---|
646 | if(ret < 5) return -1; |
---|
647 | |
---|
648 | ctx->images[ctx->nimages] = pipi_copy(ctx->images[ctx->nimages - 1]); |
---|
649 | pipi_draw_line(ctx->images[ctx->nimages], |
---|
650 | x1, y1, x2, y2, color, aa); |
---|
651 | ctx->nimages++; |
---|
652 | } |
---|
653 | else if(!strcmp(cmd, "sine") || !strcmp(cmd, "wave")) |
---|
654 | { |
---|
655 | pipi_image_t *src, *dst = NULL; |
---|
656 | char const *arg; |
---|
657 | va_list ap; |
---|
658 | float dw, dh, d = 0.0, a = 0.0; |
---|
659 | int ret; |
---|
660 | |
---|
661 | if(ctx->nimages < 1) |
---|
662 | return -1; |
---|
663 | |
---|
664 | va_start(ap, cmd); |
---|
665 | arg = va_arg(ap, char const *); |
---|
666 | va_end(ap); |
---|
667 | |
---|
668 | ret = sscanf(arg, "%gx%g+%gr%g", &dw, &dh, &d, &a); |
---|
669 | if(ret < 2) |
---|
670 | return -1; |
---|
671 | |
---|
672 | src = ctx->images[ctx->nimages - 1]; |
---|
673 | switch(cmd[0]) |
---|
674 | { |
---|
675 | case 's': dst = pipi_sine(src, dw, dh, d, a); break; |
---|
676 | case 'w': dst = pipi_wave(src, dw, dh, d, a); break; |
---|
677 | } |
---|
678 | if(dst == NULL) |
---|
679 | return -1; |
---|
680 | pipi_free(src); |
---|
681 | ctx->images[ctx->nimages - 1] = dst; |
---|
682 | } |
---|
683 | else |
---|
684 | { |
---|
685 | return -1; |
---|
686 | } |
---|
687 | |
---|
688 | return 0; |
---|
689 | } |
---|
690 | |
---|