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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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14
src/screenshooter.c
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@ -240,6 +240,18 @@ output_run(uint32_t *p, uint32_t delta, int run)
return p;
}
static uint32_t
component_delta(uint32_t next, uint32_t prev)
{
unsigned char dr, dg, db;
dr = (next >> 16) - (prev >> 16);
dg = (next >> 8) - (prev >> 8);
db = (next >> 0) - (prev >> 0);
return (dr << 16) | (dg << 8) | (db << 0);
}
static void
weston_recorder_frame_notify(struct wl_listener *listener, void *data)
{
@ -295,7 +307,7 @@ weston_recorder_frame_notify(struct wl_listener *listener, void *data)
stride * (r[i].y2 - j - 1) + r[i].x1;
for (k = 0; k < width; k++) {
next = *s++;
delta = (next - *d) & 0x00ffffff;
delta = component_delta(next, *d);
*d++ = next;
if (run == 0 || delta == prev) {
run++;

11
wcap/wcap-decode.c
View File

@ -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;