diff options
Diffstat (limited to '')
| -rw-r--r-- | src/blind-time-blur.c | 64 |
1 files changed, 39 insertions, 25 deletions
diff --git a/src/blind-time-blur.c b/src/blind-time-blur.c index c5d9ee5..702b280 100644 --- a/src/blind-time-blur.c +++ b/src/blind-time-blur.c @@ -9,36 +9,48 @@ USAGE("alpha-stream") static int first = 1; +#define PROCESS(TYPE)\ + do {\ + typedef TYPE pixel_t[4];\ + pixel_t *restrict clr = (pixel_t *)cbuf;\ + pixel_t *restrict alf = (pixel_t *)abuf;\ + pixel_t *img = (pixel_t *)output;\ + size_t i, n = cn / sizeof(pixel_t);\ + TYPE a1, a2;\ + \ + if (first) {\ + memcpy(output, cbuf, cn);\ + first = 0;\ + return;\ + }\ + \ + for (i = 0; i < n; i++, clr++, alf++, img++) {\ + a1 = (*img)[3];\ + a2 = (*clr)[3] * (*alf)[1] * (*alf)[3];\ + a1 *= (1 - a2);\ + (*img)[0] = (*img)[0] * a1 + (*clr)[0] * a2;\ + (*img)[1] = (*img)[1] * a1 + (*clr)[1] * a2;\ + (*img)[2] = (*img)[2] * a1 + (*clr)[2] * a2;\ + (*img)[3] = a1 + a2;\ + }\ + \ + (void) colour;\ + (void) alpha;\ + (void) an;\ + } while (0) + static void process_xyza(char *output, char *restrict cbuf, char *restrict abuf, struct stream *colour, struct stream *alpha, size_t cn, size_t an) { - typedef double pixel_t[4]; - pixel_t *restrict clr = (pixel_t *)cbuf; - pixel_t *restrict alf = (pixel_t *)abuf; - pixel_t *img = (pixel_t *)output; - size_t i, n = cn / sizeof(pixel_t); - double a1, a2; - - if (first) { - memcpy(output, cbuf, cn); - first = 0; - return; - } - - for (i = 0; i < n; i++, clr++, alf++, img++) { - a1 = (*img)[3]; - a2 = (*clr)[3] * (*alf)[1] * (*alf)[3]; - a1 *= (1 - a2); - (*img)[0] = (*img)[0] * a1 + (*clr)[0] * a2; - (*img)[1] = (*img)[1] * a1 + (*clr)[1] * a2; - (*img)[2] = (*img)[2] * a1 + (*clr)[2] * a2; - (*img)[3] = a1 + a2; - } + PROCESS(double); +} - (void) colour; - (void) alpha; - (void) an; +static void +process_xyzaf(char *output, char *restrict cbuf, char *restrict abuf, + struct stream *colour, struct stream *alpha, size_t cn, size_t an) +{ + PROCESS(float); } int @@ -61,6 +73,8 @@ main(int argc, char *argv[]) if (!strcmp(colour.pixfmt, "xyza")) process = process_xyza; + else if (!strcmp(colour.pixfmt, "xyza f")) + process = process_xyzaf; else eprintf("pixel format %s is not supported, try xyza\n", colour.pixfmt); |