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add edge detection to that example

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This commit is contained in:
Zack Rusin
2008-06-16 13:19:41 -04:00
parent ec9c79a7dd
commit 4d38d86b2c
1 changed files with 13 additions and 0 deletions
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13
progs/glsl/convolutions.c
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@@ -12,6 +12,7 @@ enum Filter {
SHARPEN,
MEAN_REMOVAL,
EMBOSS,
EDGE_DETECT,
NO_FILTER,
LAST
};
@@ -146,6 +147,17 @@ static void fillConvolution(GLint *k,
color[2] = 0.5;
color[3] = 0.5;
break;
case EDGE_DETECT:
k[0] = 1; k[1] = 1; k[2] = 1;
k[3] = 0; k[4] = 0; k[5] = 0;
k[6] = -1; k[7] = -1; k[8] = -1;
*scale = 1.;
color[0] = 0.5;
color[1] = 0.5;
color[2] = 0.5;
color[3] = 0.5;
break;
case NO_FILTER:
k[0] = 0; k[1] = 0; k[2] = 0;
k[3] = 0; k[4] = 1; k[5] = 0;
@@ -294,6 +306,7 @@ static void menuInit()
glutAddMenuEntry("Sharpen", SHARPEN);
glutAddMenuEntry("Mean removal", MEAN_REMOVAL);
glutAddMenuEntry("Emboss", EMBOSS);
glutAddMenuEntry("Edge detect", EDGE_DETECT);
glutAddMenuEntry("None", NO_FILTER);
glutAddMenuEntry("Quit", QUIT);