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/*
* program to assemble a pile of little images into a bigger one to
* calculate a common palette
*/
#include <SDL.h>
#include <SDL_image.h>
#include "pngsaver.h"
SDL_Surface *out_colors, *out_mask;
SDL_Surface *inp;
/*
* first argument: horizontal or vertial (h/v/hm/vm)
* second argument: output filename
* 3rd- argument: input filenames
*
* the first halve of the images must be the color images and the second halve
* the mask images
*
* all images should have same size otherwise strange things
* may happen
*/
int main(int argn, char *args[]) {
if (argn < 4)
return 0;
int vertical;
int correction;
int arg;
int images = (argn - 3) / 2;
if (args[1][0] == 'h')
vertical = 0;
else
vertical = 1;
if (args[1][1] == 'm')
correction = 1;
else
correction = 0;
arg = 3;
SDL_Rect r;
r.x = 0;
r.y = 0;
printf(" loading images\n");
while (arg < images + 3) {
inp = IMG_LoadPNG_RW(SDL_RWFromFile(args[arg], "rb"));
if (!inp)
inp = IMG_LoadTGA_RW(SDL_RWFromFile(args[arg], "rb"));
if (arg == 3) {
if (vertical) {
out_colors = SDL_CreateRGBSurface(0, inp->w, inp->h * images, 32, 0xff0000, 0xff00, 0xff, 0);
out_mask = SDL_CreateRGBSurface(0, inp->w, inp->h * images, 32, 0xff0000, 0xff00, 0xff, 0);
} else {
out_colors = SDL_CreateRGBSurface(0, inp->w * images, inp->h, 32, 0xff0000, 0xff00, 0xff, 0);
out_mask = SDL_CreateRGBSurface(0, inp->w * images, inp->h, 32, 0xff0000, 0xff00, 0xff, 0);
}
}
SDL_BlitSurface(inp, NULL, out_colors, &r);
SDL_FreeSurface(inp);
inp = IMG_LoadPNG_RW(SDL_RWFromFile(args[arg+images], "rb"));
if (!inp)
inp = IMG_LoadTGA_RW(SDL_RWFromFile(args[arg+images], "rb"));
SDL_BlitSurface(inp, NULL, out_mask, &r);
if (vertical)
r.y += inp->h;
else
r.x += inp->w;
SDL_FreeSurface(inp);
arg++;
}
if (correction) {
Uint32 x, y;
printf(" modifying colors\n");
for (y = 0; y < out_colors->h; y++)
for (x = 0; x < out_colors->w; x++) {
Uint8 b = ((Uint8*)out_mask->pixels)[y*out_mask->pitch+x*out_mask->format->BytesPerPixel];
if (b != 0) {
double a;
double f = (double)b / 255;
a = ((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 0];
a = a / f;
((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 0] = (Uint8)(a+0.5);
a = ((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 1];
a = a / f;
((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 1] = (Uint8)(a+0.5);
a = ((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 2];
a = a / f;
((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 2] = (Uint8)(a+0.5);
a = ((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 3];
a = a / f;
((Uint8*)out_colors->pixels)[y*out_colors->pitch+x*out_mask->format->BytesPerPixel + 3] = (Uint8)(a+0.5);
}
}
}
char s[500];
printf(" saving\n");
sprintf(s, "%s_colors.png", args[2]);
printf(" colors into %s\n", s);
SavePNGImage(s, out_colors);
printf(" mask into %s\n", s);
sprintf(s, "%s_mask.png", args[2]);
SavePNGImage(s, out_mask);
return 0;
}
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