notgne2/tuxpaint-pencil-sharpener
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Finalised mosaic.c

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This commit is contained in:
Andrew Corcoran 2008-07-20 01:36:54 +00:00
parent 9e1a97efd5
commit 40c8c1ff1f
3 changed files with 162 additions and 105 deletions
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4
magic/src/sharpen.c
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@ -153,7 +153,7 @@ static void do_sharpen_pixel(void * ptr, int which,
for (i=-1;i<2;i++){
for(j=-1; j<2; j++){
//No need to check if inside canvas, getpixel does it for us.
SDL_GetRGB(api->getpixel(canvas, x+i, y+j), canvas->format, &r1, &g1, &b1);
SDL_GetRGB(api->getpixel(last, x+i, y+j), last->format, &r1, &g1, &b1);
grey = sharpen_grey(r1,g1,b1);
sobel_1 += grey * sobel_weights_1[i+1][j+1];
sobel_2 += grey * sobel_weights_2[i+1][j+1];
@ -175,7 +175,7 @@ static void do_sharpen_pixel(void * ptr, int which,
}
//Add the edge values to the original image, creating a more distinct jump in contrast at edges
else if(which == TOOL_SHARPEN){
SDL_GetRGB(api->getpixel(canvas, x, y), canvas->format, &r1, &g1, &b1);
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r1, &g1, &b1);
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, clamp(0.0, r1 + SHARPEN * temp, 255.0),
clamp(0.0, g1 + SHARPEN * temp, 255.0),
clamp(0.0, b1 + SHARPEN * temp, 255.0)));