1 | /* |
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2 | AiO Screengrabber v0.81 |
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3 | |
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4 | written 2006 - 2008 by Seddi |
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5 | Contact: seddi@ihad.tv / http://www.ihad.tv |
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6 | |
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7 | This standalone binary will grab the video-picture convert it from |
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8 | yuv to rgb and resize it, if neccesary, to the same size as the framebuffer or |
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9 | vice versa. For the DM7025 (Xilleon) and DM800/DM8000 (Broadcom) the video will be |
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10 | grabbed directly from the decoder memory. |
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11 | It also grabs the framebuffer picture in 32Bit, 16Bit or in 8Bit mode with the |
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12 | correct colortable in 8Bit mode from the main graphics memory, because the |
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13 | FBIOGETCMAP is buggy on Vulcan/Pallas boxes and didnt give you the correct color |
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14 | map. |
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15 | Finally it will combine the pixmaps to one final picture by using the framebuffer |
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16 | alphamap and save it as bmp, jpeg or png file. So you will get the same picture |
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17 | as you can see on your TV Screen. |
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18 | |
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19 | There are a few command line switches, use "grab -h" to get them listed. |
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20 | |
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21 | A special Thanx to tmbinc and ghost for the needed decoder memory information and |
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22 | the great support. |
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23 | |
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24 | Feel free to use the code for your own projects. See LICENSE file for details. |
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25 | */ |
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26 | |
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27 | #define GRAB_VERSION "v0.81" |
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28 | |
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29 | #include <unistd.h> |
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30 | #include <fcntl.h> |
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31 | #include <stdio.h> |
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32 | #include <stdlib.h> |
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33 | #include <string.h> |
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34 | #include <ctype.h> |
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35 | #include <sys/types.h> |
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36 | #include <sys/stat.h> |
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37 | #include <sys/ioctl.h> |
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38 | #include <sys/mman.h> |
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39 | #include <linux/types.h> |
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40 | #include <linux/videodev.h> |
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41 | #include <linux/fb.h> |
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42 | #include "png.h" |
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43 | #include "jpeglib.h" |
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44 | |
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45 | #define SWAP(x,y) { x ^= y; y ^= x; x ^= y; } |
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46 | |
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47 | #define RED565(x) ((((x) >> (11 )) & 0x1f) << 3) |
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48 | #define GREEN565(x) ((((x) >> (5 )) & 0x3f) << 2) |
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49 | #define BLUE565(x) ((((x) >> (0)) & 0x1f) << 3) |
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50 | |
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51 | void getvideo(unsigned char *video, int *xres, int *yres); |
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52 | void getosd(unsigned char *osd, unsigned char *osd_alpha, int *xres, int *yres); |
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53 | void smooth_resize(unsigned char *source, unsigned char *dest, int xsource, int ysource, int xdest, int ydest, int colors); |
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54 | void fast_resize(unsigned char *source, unsigned char *dest, int xsource, int ysource, int xdest, int ydest, int colors); |
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55 | void (*resize)(unsigned char *source, unsigned char *dest, int xsource, int ysource, int xdest, int ydest, int colors); |
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56 | void combine(unsigned char *output, unsigned char *video, unsigned char *osd, unsigned char *osd_alpha, int xres, int yres); |
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57 | char* upcase(char* mixedstr); |
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58 | |
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59 | char pngfile[256]=""; |
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60 | unsigned char *image_data, bg_red=0, bg_green=0, bg_blue=0; |
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61 | static unsigned long image_width, image_height, image_rowbytes; |
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62 | static int image_channels; |
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63 | |
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64 | void convertpng(unsigned char *video) |
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65 | { |
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66 | unsigned char *src, r, g, b; |
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67 | unsigned long color, i, row; |
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68 | |
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69 | for (row = 0; row < image_height; ++row) { |
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70 | src = image_data + row*image_rowbytes; |
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71 | for (i = 0; i<image_width; i++) { |
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72 | r = *src++; |
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73 | g = *src++; |
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74 | b = *src++; |
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75 | color = (r << 16) | (g << 8) | b; |
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76 | memcpy(video + (i*3)+(row*image_rowbytes), &color, 3); |
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77 | } |
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78 | } |
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79 | } |
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80 | |
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81 | int openpng(void) |
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82 | { |
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83 | FILE *infile; |
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84 | int rc; |
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85 | |
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86 | if (!(infile = fopen(pngfile, "rb"))) { |
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87 | printf("[grab] can't open PNG file [%s]\n", pngfile); |
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88 | return(1); |
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89 | } |
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90 | if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) { |
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91 | switch (rc) { |
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92 | case 1: |
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93 | printf("[grab] %s is not a PNG file:\n", pngfile); |
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94 | fclose(infile); |
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95 | return(1); |
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96 | case 2: |
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97 | printf("[grab] %s has bad IHDR (libpng longjmp)\n", pngfile); |
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98 | fclose(infile); |
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99 | return(1); |
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100 | case 4: |
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101 | printf("[grab] insufficient memory\n"); |
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102 | fclose(infile); |
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103 | return(1); |
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104 | default: |
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105 | printf("[grab] unknown readpng_init() error\n"); |
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106 | fclose(infile); |
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107 | return(1); |
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108 | } |
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109 | } |
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110 | image_data = readpng_get_image(2.2 , &image_channels, &image_rowbytes); |
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111 | readpng_cleanup(0); |
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112 | fclose(infile); |
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113 | |
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114 | if (!image_data) { |
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115 | printf("[grab] unable to decode PNG image\n"); |
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116 | return(1); |
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117 | } |
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118 | |
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119 | printf("[grab] image hight = %ld\n", image_height); |
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120 | printf("[grab] image width = %ld\n", image_width); |
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121 | printf("[grab] image channels = %d\n", image_channels); |
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122 | printf("[grab] image rowbytes = %ld\n", image_rowbytes); |
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123 | return(0); |
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124 | } |
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125 | |
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126 | int main(int argc, char **argv) { |
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127 | FILE *pipe; |
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128 | char buf[256]; |
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129 | |
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130 | printf("[grab] AiO Screengrabber "GRAB_VERSION"\n\n"); |
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131 | |
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132 | int xres_v,yres_v,xres_o,yres_o,xres,yres,aspect; |
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133 | int c,osd_only,video_only,use_osd_res,width,use_png,use_jpg,jpg_quality,no_aspect,use_letterbox; |
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134 | |
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135 | // we use fast resize as standard now |
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136 | resize = &fast_resize; |
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137 | |
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138 | osd_only=video_only=use_osd_res=width=use_png=use_jpg=no_aspect=use_letterbox=0; |
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139 | jpg_quality=50; |
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140 | aspect=1; |
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141 | |
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142 | unsigned char *video, *osd, *osd_alpha, *output; |
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143 | |
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144 | char filename[256]; |
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145 | sprintf(filename,"/tmp/screenshot.bmp"); |
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146 | |
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147 | // process command line |
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148 | while ((c = getopt (argc, argv, "dhj:lbnopr:vf:")) != -1) |
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149 | { |
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150 | switch (c) |
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151 | { |
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152 | case 'h': |
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153 | case '?': |
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154 | printf("Usage: grab [commands] [filename]\n\n"); |
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155 | printf("command:\n"); |
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156 | printf("-f (videofile) png video screenshot\n"); |
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157 | printf("-o only grab osd (framebuffer)\n"); |
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158 | printf("-v only grab video\n"); |
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159 | printf("-d always use osd resolution (good for skinshots)\n"); |
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160 | printf("-n dont correct 16:9 aspect ratio\n"); |
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161 | printf("-r (size) resize to a fixed width, maximum: 1920\n"); |
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162 | printf("-l always 4:3, create letterbox if 16:9\n"); |
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163 | printf("-b use bicubic picture resize (slow but smooth)\n"); |
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164 | printf("-j (quality) produce jpg files instead of bmp (quality 0-100)\n"); |
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165 | printf("-p produce png files instead of bmp\n"); |
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166 | printf("-h this help screen\n\n"); |
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167 | |
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168 | printf("If no command is given the complete picture will be grabbed.\n"); |
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169 | printf("If no filename is given /tmp/screenshot.[bmp/jpg/png] will be used.\n"); |
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170 | return 0; |
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171 | break; |
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172 | case 'o': // OSD only |
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173 | osd_only=1; |
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174 | video_only=0; |
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175 | break; |
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176 | case 'v': // Video only |
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177 | video_only=1; |
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178 | osd_only=0; |
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179 | break; |
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180 | case 'd': // always use OSD resolution |
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181 | use_osd_res=1; |
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182 | no_aspect=1; |
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183 | break; |
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184 | case 'r': // use given resolution |
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185 | width=atoi(optarg); |
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186 | if (width > 1920) |
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187 | { |
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188 | printf("[grab] Error: -r (size) ist limited to 1920 pixel !\n"); |
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189 | return 1; |
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190 | } |
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191 | break; |
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192 | case 'l': // create letterbox |
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193 | use_letterbox=1; |
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194 | break; |
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195 | case 'b': // use bicubic resizing |
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196 | resize = &smooth_resize; |
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197 | break; |
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198 | case 'p': // use png file format |
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199 | use_png=1; |
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200 | use_jpg=0; |
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201 | sprintf(filename,"/tmp/screenshot.png"); |
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202 | break; |
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203 | case 'f': |
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204 | sprintf(pngfile, "%s", optarg); |
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205 | break; |
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206 | case 'j': // use jpg file format |
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207 | use_jpg=1; |
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208 | use_png=0; |
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209 | jpg_quality=atoi(optarg); |
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210 | sprintf(filename,"/tmp/screenshot.jpg"); |
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211 | break; |
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212 | case 'n': |
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213 | no_aspect=1; |
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214 | break; |
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215 | } |
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216 | } |
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217 | if (optind < argc) // filename |
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218 | sprintf(filename,"%s",argv[optind]); |
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219 | |
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220 | int mallocsize=1920*1080; |
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221 | |
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222 | video = (unsigned char *)malloc(mallocsize*3); |
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223 | osd = (unsigned char *)malloc(mallocsize*3); |
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224 | osd_alpha = (unsigned char *)malloc(mallocsize); |
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225 | |
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226 | output = (unsigned char *)malloc(mallocsize*3); |
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227 | |
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228 | // get osd |
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229 | if (!video_only) |
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230 | getosd(osd,osd_alpha,&xres_o,&yres_o); |
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231 | |
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232 | // get video |
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233 | if (!osd_only) |
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234 | getvideo(video,&xres_v,&yres_v); |
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235 | |
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236 | pipe=popen("cat /proc/stb/vmpeg/0/aspect","r"); |
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237 | while (fgets(buf,sizeof(buf),pipe)) |
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238 | sscanf(buf,"%x",&aspect); |
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239 | pclose(pipe); |
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240 | |
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241 | // resizing |
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242 | if (video_only) |
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243 | { |
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244 | xres=xres_v; |
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245 | yres=yres_v; |
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246 | } else if (osd_only) |
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247 | { |
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248 | xres=xres_o; |
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249 | yres=yres_o; |
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250 | } else if (xres_o == xres_v && yres_o == yres_v) |
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251 | { |
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252 | xres=xres_v; |
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253 | yres=yres_v; |
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254 | } else |
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255 | { |
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256 | if (xres_v > xres_o && !use_osd_res && (width == 0 || width > xres_o)) |
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257 | { |
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258 | // resize osd to video size |
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259 | printf("[grab] Resizing OSD to %d x %d ...\n",xres_v,yres_v); |
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260 | resize(osd,output,xres_o,yres_o,xres_v,yres_v,3); |
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261 | memcpy(osd,output,xres_v*yres_v*3); |
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262 | resize(osd_alpha,output,xres_o,yres_o,xres_v,yres_v,1); |
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263 | memcpy(osd_alpha,output,xres_v*yres_v); |
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264 | xres=xres_v; |
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265 | yres=yres_v; |
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266 | } else |
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267 | { |
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268 | // resize video to osd size |
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269 | printf("[grab] Resizing Video to %d x %d ...\n",xres_o,yres_o); |
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270 | resize(video,output,xres_v,yres_v,xres_o,yres_o,3); |
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271 | memcpy(video,output,xres_o*yres_o*3); |
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272 | xres=xres_o; |
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273 | yres=yres_o; |
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274 | } |
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275 | } |
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276 | |
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277 | |
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278 | // merge video and osd if neccessary |
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279 | if (osd_only) |
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280 | memcpy(output,osd,xres*yres*3); |
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281 | else if (video_only) |
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282 | memcpy(output,video,xres*yres*3); |
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283 | else |
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284 | { |
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285 | printf("[grab] Merge Video with Framebuffer ...\n"); |
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286 | combine(output,video,osd,osd_alpha,xres,yres); |
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287 | } |
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288 | |
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289 | |
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290 | // resize to specific width ? |
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291 | if (width) |
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292 | { |
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293 | printf("[grab] Resizing Screenshot to %d x %d ...\n",width,yres*width/xres); |
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294 | resize(output,video,xres,yres,width,(yres*width/xres),3); |
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295 | yres=yres*width/xres; |
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296 | xres=width; |
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297 | memcpy(output,video,xres*yres*3); |
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298 | } |
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299 | |
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300 | |
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301 | // correct aspect ratio |
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302 | if (!no_aspect && aspect == 3 && ((float)xres/(float)yres)<1.5) |
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303 | { |
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304 | printf("[grab] Correct aspect ratio to 16:9 ...\n"); |
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305 | resize(output,video,xres,yres,xres,yres/1.42,3); |
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306 | yres/=1.42; |
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307 | memcpy(output,video,xres*yres*3); |
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308 | } |
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309 | |
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310 | |
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311 | // use letterbox ? |
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312 | if (use_letterbox && xres*0.8 != yres && xres*0.8 <= 1080) |
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313 | { |
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314 | int yres_neu; |
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315 | yres_neu=xres*0.8; |
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316 | printf("[grab] Create letterbox %d x %d ...\n",xres,yres_neu); |
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317 | if (yres_neu > yres) |
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318 | { |
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319 | int ofs; |
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320 | ofs=(yres_neu-yres)>>1; |
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321 | memmove(output+ofs*xres*3,output,xres*yres*3); |
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322 | memset(output,0,ofs*xres*3); |
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323 | memset(output+ofs*xres*3+xres*yres*3,0,ofs*xres*3); |
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324 | } |
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325 | yres=yres_neu; |
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326 | } |
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327 | |
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328 | |
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329 | // saving picture |
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330 | printf("[grab] Saving %s ...\n",filename); |
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331 | FILE *fd2 = fopen(filename, "wr"); |
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332 | |
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333 | |
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334 | if (!use_png && !use_jpg) |
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335 | { |
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336 | // write bmp |
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337 | unsigned char hdr[14 + 40]; |
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338 | int i = 0; |
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339 | #define PUT32(x) hdr[i++] = ((x)&0xFF); hdr[i++] = (((x)>>8)&0xFF); hdr[i++] = (((x)>>16)&0xFF); hdr[i++] = (((x)>>24)&0xFF); |
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340 | #define PUT16(x) hdr[i++] = ((x)&0xFF); hdr[i++] = (((x)>>8)&0xFF); |
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341 | #define PUT8(x) hdr[i++] = ((x)&0xFF); |
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342 | PUT8('B'); PUT8('M'); |
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343 | PUT32((((xres * yres) * 3 + 3) &~ 3) + 14 + 40); |
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344 | PUT16(0); PUT16(0); PUT32(14 + 40); |
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345 | PUT32(40); PUT32(xres); PUT32(yres); |
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346 | PUT16(1); |
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347 | PUT16(24); |
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348 | PUT32(0); PUT32(0); PUT32(0); PUT32(0); PUT32(0); PUT32(0); |
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349 | #undef PUT32 |
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350 | #undef PUT16 |
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351 | #undef PUT8 |
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352 | fwrite(hdr, 1, i, fd2); |
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353 | |
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354 | int y; |
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355 | for (y=yres-1; y>=0 ; y-=1) { |
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356 | fwrite(output+(y*xres*3),xres*3,1,fd2); |
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357 | } |
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358 | } else if (use_png) |
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359 | { |
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360 | // write png |
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361 | png_bytep *row_pointers; |
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362 | png_structp png_ptr; |
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363 | png_infop info_ptr; |
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364 | |
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365 | png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, (png_error_ptr)NULL, (png_error_ptr)NULL); |
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366 | info_ptr = png_create_info_struct(png_ptr); |
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367 | png_init_io(png_ptr, fd2); |
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368 | |
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369 | row_pointers=(png_bytep*)malloc(sizeof(png_bytep)*yres); |
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370 | |
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371 | int y; |
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372 | for (y=0; y<yres; y++) |
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373 | row_pointers[y]=output+(y*xres*3); |
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374 | |
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375 | png_set_bgr(png_ptr); |
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376 | png_set_IHDR(png_ptr, info_ptr, xres, yres, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); |
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377 | png_write_info(png_ptr, info_ptr); |
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378 | png_write_image(png_ptr, row_pointers); |
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379 | png_write_end(png_ptr, info_ptr); |
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380 | png_destroy_write_struct(&png_ptr, &info_ptr); |
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381 | |
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382 | free(row_pointers); |
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383 | } else |
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384 | { |
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385 | // write jpg |
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386 | int x,y; |
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387 | for (y=0; y<yres; y++) |
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388 | for (x=0; x<xres; x++) |
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389 | SWAP(output[x*3+y*xres*3],output[x*3+y*xres*3+2]); |
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390 | |
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391 | struct jpeg_compress_struct cinfo; |
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392 | struct jpeg_error_mgr jerr; |
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393 | JSAMPROW row_pointer[1]; |
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394 | int row_stride; |
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395 | cinfo.err = jpeg_std_error(&jerr); |
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396 | |
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397 | jpeg_create_compress(&cinfo); |
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398 | jpeg_stdio_dest(&cinfo, fd2); |
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399 | cinfo.image_width = xres; |
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400 | cinfo.image_height = yres; |
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401 | cinfo.input_components = 3; |
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402 | cinfo.in_color_space = JCS_RGB; |
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403 | jpeg_set_defaults(&cinfo); |
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404 | jpeg_set_quality(&cinfo,jpg_quality, TRUE); |
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405 | jpeg_start_compress(&cinfo, TRUE); |
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406 | row_stride = xres * 3; |
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407 | while (cinfo.next_scanline < cinfo.image_height) |
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408 | { |
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409 | row_pointer[0] = & output[cinfo.next_scanline * row_stride]; |
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410 | (void) jpeg_write_scanlines(&cinfo, row_pointer, 1); |
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411 | } |
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412 | jpeg_finish_compress(&cinfo); |
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413 | jpeg_destroy_compress(&cinfo); |
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414 | } |
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415 | |
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416 | fclose(fd2); |
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417 | |
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418 | // Thats all folks |
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419 | printf("[grab] ... Done !\n"); |
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420 | |
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421 | // clean up |
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422 | free(video); |
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423 | free(osd); |
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424 | free(osd_alpha); |
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425 | free(output); |
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426 | |
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427 | return 0; |
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428 | } |
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429 | |
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430 | // grabing the video picture |
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431 | |
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432 | void getvideo(unsigned char *video, int *xres, int *yres) |
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433 | { |
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434 | printf("[grab] Grabbing Video ...\n"); |
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435 | |
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436 | if(openpng() != 0) |
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437 | exit(1); |
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438 | convertpng(video); |
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439 | *yres=image_height; |
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440 | *xres=image_width; |
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441 | } |
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442 | |
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443 | // grabing the osd picture |
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444 | |
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445 | void getosd(unsigned char *osd, unsigned char *osd_alpha, int *xres, int *yres) |
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446 | { |
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447 | int fb,x,y,pos,pos1,pos2,ofs; |
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448 | unsigned char *lfb; |
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449 | struct fb_fix_screeninfo fix_screeninfo; |
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450 | struct fb_var_screeninfo var_screeninfo; |
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451 | |
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452 | fb=open("/dev/fb/0", O_RDWR); |
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453 | if (fb == -1) |
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454 | { |
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455 | fb=open("/dev/fb0", O_RDWR); |
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456 | if (fb == -1) |
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457 | { |
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458 | printf("[grab] Framebuffer failed\n"); |
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459 | return; |
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460 | } |
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461 | } |
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462 | |
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463 | if(ioctl(fb, FBIOGET_FSCREENINFO, &fix_screeninfo) == -1) |
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464 | { |
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465 | printf("[grab] Framebuffer: <FBIOGET_FSCREENINFO failed>\n"); |
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466 | return; |
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467 | } |
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468 | |
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469 | if(ioctl(fb, FBIOGET_VSCREENINFO, &var_screeninfo) == -1) |
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470 | { |
---|
471 | printf("[grab] Framebuffer: <FBIOGET_VSCREENINFO failed>\n"); |
---|
472 | return; |
---|
473 | } |
---|
474 | |
---|
475 | if(!(lfb = (unsigned char*)mmap(0, fix_screeninfo.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fb, 0))) |
---|
476 | { |
---|
477 | printf("[grab] Framebuffer: <Memmapping failed>\n"); |
---|
478 | return; |
---|
479 | } |
---|
480 | |
---|
481 | if ( var_screeninfo.bits_per_pixel == 32 ) |
---|
482 | { |
---|
483 | printf("[grab] Grabbing 32bit Framebuffer ...\n"); |
---|
484 | |
---|
485 | // get 32bit framebuffer |
---|
486 | pos=pos1=pos2=0; |
---|
487 | ofs=fix_screeninfo.line_length-(var_screeninfo.xres*4); |
---|
488 | |
---|
489 | unsigned char *memory; // use additional buffer to speed up especially when using hd skins |
---|
490 | memory = (unsigned char *)malloc(fix_screeninfo.line_length*var_screeninfo.yres); |
---|
491 | memcpy(memory,lfb,fix_screeninfo.line_length*var_screeninfo.yres); |
---|
492 | |
---|
493 | for (y=0; y < var_screeninfo.yres; y+=1) |
---|
494 | { |
---|
495 | for (x=0; x < var_screeninfo.xres; x+=1) |
---|
496 | { |
---|
497 | memcpy(osd+pos1,memory+pos2,3);// bgr |
---|
498 | pos1+=3; |
---|
499 | pos2+=3; |
---|
500 | osd_alpha[pos++]=memory[pos2++];// tr |
---|
501 | } |
---|
502 | pos2+=ofs; |
---|
503 | } |
---|
504 | |
---|
505 | free(memory); |
---|
506 | } else if ( var_screeninfo.bits_per_pixel == 16 ) |
---|
507 | { |
---|
508 | printf("[grab] Grabbing 16bit Framebuffer ...\n"); |
---|
509 | unsigned short color; |
---|
510 | |
---|
511 | // get 16bit framebuffer |
---|
512 | pos=pos1=pos2=0; |
---|
513 | ofs=fix_screeninfo.line_length-(var_screeninfo.xres*2); |
---|
514 | for (y=0; y < var_screeninfo.yres; y+=1) |
---|
515 | { |
---|
516 | for (x=0; x < var_screeninfo.xres; x+=1) |
---|
517 | { |
---|
518 | color = lfb[pos2] << 8 | lfb[pos2+1]; |
---|
519 | pos2+=2; |
---|
520 | |
---|
521 | osd[pos1++] = BLUE565(color); // b |
---|
522 | osd[pos1++] = GREEN565(color); // g |
---|
523 | osd[pos1++] = RED565(color); // r |
---|
524 | osd_alpha[pos++]=0x00; // tr - there is no transparency in 16bit mode |
---|
525 | } |
---|
526 | pos2+=ofs; |
---|
527 | } |
---|
528 | } |
---|
529 | close(fb); |
---|
530 | |
---|
531 | *xres=var_screeninfo.xres; |
---|
532 | *yres=var_screeninfo.yres; |
---|
533 | printf("[grab] ... Framebuffer-Size: %d x %d\n",*xres,*yres); |
---|
534 | } |
---|
535 | |
---|
536 | // bicubic pixmap resizing |
---|
537 | |
---|
538 | void smooth_resize(unsigned char *source, unsigned char *dest, int xsource, int ysource, int xdest, int ydest, int colors) |
---|
539 | { |
---|
540 | unsigned int xs,ys,xd,yd,dpixel,fx,fy; |
---|
541 | unsigned int c,tmp_i; |
---|
542 | int x,y,t,t1; |
---|
543 | xs=xsource; // x-resolution source |
---|
544 | ys=ysource; // y-resolution source |
---|
545 | xd=xdest; // x-resolution destination |
---|
546 | yd=ydest; // y-resolution destination |
---|
547 | |
---|
548 | // get x scale factor, use bitshifting to get rid of floats |
---|
549 | fx=((xs-1)<<16)/xd; |
---|
550 | |
---|
551 | // get y scale factor, use bitshifting to get rid of floats |
---|
552 | fy=((ys-1)<<16)/yd; |
---|
553 | |
---|
554 | unsigned int sx1[xd],sx2[xd],sy1,sy2; |
---|
555 | |
---|
556 | // pre calculating sx1/sx2 for faster resizing |
---|
557 | for (x=0; x<xd; x++) |
---|
558 | { |
---|
559 | // first x source pixel for calculating destination pixel |
---|
560 | sx1[x]=(fx*x)>>16; //floor() |
---|
561 | |
---|
562 | // last x source pixel for calculating destination pixel |
---|
563 | sx2[x]=sx1[x]+(fx>>16); |
---|
564 | if (fx & 0x7FFF) //ceil() |
---|
565 | sx2[x]++; |
---|
566 | } |
---|
567 | |
---|
568 | // Scale |
---|
569 | for (y=0; y<yd; y++) |
---|
570 | { |
---|
571 | |
---|
572 | // first y source pixel for calculating destination pixel |
---|
573 | sy1=(fy*y)>>16; //floor() |
---|
574 | |
---|
575 | // last y source pixel for calculating destination pixel |
---|
576 | sy2=sy1+(fy>>16); |
---|
577 | if (fy & 0x7FFF) //ceil() |
---|
578 | sy2++; |
---|
579 | |
---|
580 | for (x=0; x<xd; x++) |
---|
581 | { |
---|
582 | // we do this for every color |
---|
583 | for (c=0; c<colors; c++) |
---|
584 | { |
---|
585 | // calculationg destination pixel |
---|
586 | tmp_i=0; |
---|
587 | dpixel=0; |
---|
588 | |
---|
589 | for (t1=sy1; t1<sy2; t1++) |
---|
590 | { |
---|
591 | for (t=sx1[x]; t<=sx2[x]; t++) |
---|
592 | { |
---|
593 | tmp_i+=(int)source[(t*colors)+c+(t1*xs*colors)]; |
---|
594 | dpixel++; |
---|
595 | } |
---|
596 | } |
---|
597 | // writing calculated pixel into destination pixmap |
---|
598 | dest[(x*colors)+c+(y*xd*colors)]=tmp_i/dpixel; |
---|
599 | } |
---|
600 | } |
---|
601 | } |
---|
602 | } |
---|
603 | |
---|
604 | // "nearest neighbor" pixmap resizing |
---|
605 | |
---|
606 | void fast_resize(unsigned char *source, unsigned char *dest, int xsource, int ysource, int xdest, int ydest, int colors) |
---|
607 | { |
---|
608 | int x_ratio = (int)((xsource<<16)/xdest) ; |
---|
609 | int y_ratio = (int)((ysource<<16)/ydest) ; |
---|
610 | |
---|
611 | int x2, y2, c, i ,j; |
---|
612 | for (i=0;i<ydest;i++) { |
---|
613 | for (j=0;j<xdest;j++) { |
---|
614 | x2 = ((j*x_ratio)>>16) ; |
---|
615 | y2 = ((i*y_ratio)>>16) ; |
---|
616 | for (c=0; c<colors; c++) |
---|
617 | dest[((i*xdest)+j)*colors + c] = source[((y2*xsource)+x2)*colors + c] ; |
---|
618 | } |
---|
619 | } |
---|
620 | } |
---|
621 | |
---|
622 | // combining pixmaps by using an alphamap |
---|
623 | |
---|
624 | void combine(unsigned char *output, unsigned char *video, unsigned char *osd, unsigned char *osd_alpha, int xres, int yres) |
---|
625 | { |
---|
626 | int x,y,pos,pos1; |
---|
627 | |
---|
628 | pos=pos1=0; |
---|
629 | for (y=0; y < yres; y+=1) |
---|
630 | { |
---|
631 | for (x=0; x < xres; x+=1) |
---|
632 | { |
---|
633 | output[pos1] = ( ( video[pos1] * ( 0xFF-osd_alpha[pos] ) ) + ( osd[pos1] * osd_alpha[pos] ) ) >>8; |
---|
634 | pos1++; |
---|
635 | output[pos1] = ( ( video[pos1] * ( 0xFF-osd_alpha[pos] ) ) + ( osd[pos1] * osd_alpha[pos] ) ) >>8; |
---|
636 | pos1++; |
---|
637 | output[pos1] = ( ( video[pos1] * ( 0xFF-osd_alpha[pos] ) ) + ( osd[pos1] * osd_alpha[pos] ) ) >>8; |
---|
638 | pos1++; |
---|
639 | pos++; |
---|
640 | } |
---|
641 | } |
---|
642 | } |
---|
643 | |
---|
644 | // helpers |
---|
645 | |
---|
646 | char* upcase(char* mixedstr) |
---|
647 | { |
---|
648 | int j; |
---|
649 | for (j=0; j< strlen(mixedstr); ++j) |
---|
650 | { |
---|
651 | mixedstr[j]=toupper(mixedstr[j]); |
---|
652 | } |
---|
653 | return mixedstr; |
---|
654 | } |
---|