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wcap: Compute per-component deltas

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This commit is contained in:
Kristian Høgsberg
2012-05-29 12:15:47 -04:00
parent db0623a5f0
commit 053be42a4e
2 changed files with 22 additions and 3 deletions
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wcap/wcap-decode.c
+9 -2
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@@ -42,7 +42,8 @@ wcap_decoder_decode_rectangle(struct wcap_decoder *decoder,
uint32_t v, *p = decoder->p, *d;
int width = rect->x2 - rect->x1, height = rect->y2 - rect->y1;
int x, i, j, k, l, count = width * height;
unsigned char r, g, b, dr, dg, db;
d = decoder->frame + (rect->y2 - 1) * decoder->width;
x = rect->x1;
i = 0;
@@ -55,8 +56,14 @@ wcap_decoder_decode_rectangle(struct wcap_decoder *decoder,
j = 1 << (l - 0xe0 + 7);
}
dr = (v >> 16);
dg = (v >> 8);
db = (v >> 0);
for (k = 0; k < j; k++) {
d[x] = (d[x] + v) | 0xff000000;
r = (d[x] >> 16) + dr;
g = (d[x] >> 8) + dg;
b = (d[x] >> 0) + db;
d[x] = 0xff000000 | (r << 16) | (g << 8) | b;
x++;
if (x == rect->x2) {
x = rect->x1;