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"Comic Dots" improvement; avoid tint around dots

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This commit is contained in:
Bill Kendrick 2024-09-29 00:48:48 -07:00
parent c98ab135a5
commit 7ea39f8ea6
1 changed files with 13 additions and 6 deletions
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19
magic/src/comicdot.c
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@ -22,7 +22,7 @@
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(See COPYING.txt)
Last updated: September 23, 2024
Last updated: September 29, 2024
*/
#include <stdio.h>
@ -156,7 +156,8 @@ static void do_comicdot(void *ptr, int which,
SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
magic_api *api = (magic_api *) ptr;
Uint8 r1, g1, b1, r, g, b, n, _, nr, ng, nb;
Uint8 r1, g1, b1, r, g, b, n, _;
// Uint8 nr, ng, nb;
Uint32 pixel;
int offx, offy;
SDL_Surface * pat;
@ -171,10 +172,16 @@ static void do_comicdot(void *ptr, int which,
r = ((r1 * n) + (comicdot_r * (255 - n))) / 255;
g = ((g1 * n) + (comicdot_g * (255 - n))) / 255;
b = ((b1 * n) + (comicdot_b * (255 - n))) / 255;
nr = (r1 * r) / 255;
ng = (g1 * g) / 255;
nb = (b1 * b) / 255;
pixel = SDL_MapRGB(canvas->format, nr, ng, nb);
/* N.B. This caused an unwanted outline around the effect
when drawing on a non-white background */
//nr = (r1 * r) / 255;
//ng = (g1 * g) / 255;
//nb = (b1 * b) / 255;
//pixel = SDL_MapRGB(canvas->format, nr, ng, nb);
pixel = SDL_MapRGB(canvas->format, r, g, b);
api->putpixel(canvas, x, y, pixel);
}