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Added noise and mosaic magic tools

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This commit is contained in:
Andrew Corcoran 2008-07-19 18:30:57 +00:00
parent 774c076406
commit 4c71ecdba1
4 changed files with 513 additions and 84 deletions
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22
magic/src/blur.c
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@ -105,23 +105,27 @@ static void do_blur_pixel(void * ptr, int which,
Uint8 temp[3];
double blurValue[3];
for (k =0;k<3;k++){
blurValue[k] = 0;
}
//5x5 gaussiann weighting window
const int weight[5][5] = { {1,4,7,4,1},
{4,16,26,16,4},
{7,26,41,26,7},
{4,16,26,16,4},
{1,4,7,4,1}};
for (i=-2;i<3;i++){
for (j=-2;j<3;j++){
//Add the pixels around the current one wieghted
SDL_GetRGB(api->getpixel(last, x + i, y + j), last->format, &temp[0], &temp[1], &temp[2]);
for (k =0;k<3;k++){
blurValue[k] += temp[k]* weight[i+2][j+2];
}
}
for (i=-2;i<3;i++){
for (j=-2;j<3;j++){
//Add the pixels around the current one wieghted
SDL_GetRGB(api->getpixel(canvas, x + i, y + j), canvas->format, &temp[0], &temp[1], &temp[2]);
for (k =0;k<3;k++){
blurValue[k] += temp[k]* weight[i+2][j+2];
}
}
}
for (k =0;k<3;k++){
blurValue[k] /=273;
blurValue[k] /= 273;
}
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, blurValue[0], blurValue[1], blurValue[2]));
}