diff options
Diffstat (limited to 'src/blind-set-alpha.c')
| -rw-r--r-- | src/blind-set-alpha.c | 38 |
1 files changed, 16 insertions, 22 deletions
diff --git a/src/blind-set-alpha.c b/src/blind-set-alpha.c index 23be8ab..40f1a9e 100644 --- a/src/blind-set-alpha.c +++ b/src/blind-set-alpha.c @@ -9,29 +9,21 @@ USAGE("[-i] alpha-stream") -static void -process_xyza(struct stream *colour, struct stream *alpha, size_t n) -{ - size_t i; - double a; - for (i = 0; i < n; i += colour->pixel_size) { - a = ((double *)(alpha->buf + i))[1]; - a *= ((double *)(alpha->buf + i))[3]; - ((double *)(colour->buf + i))[3] *= a; - } -} +#define PROCESS(TYPE, INV)\ + do {\ + size_t i;\ + TYPE a;\ + for (i = 0; i < n; i += colour->pixel_size) {\ + a = INV ((TYPE *)(alpha->buf + i))[1];\ + a *= ((TYPE *)(alpha->buf + i))[3];\ + ((TYPE *)(colour->buf + i))[3] *= a;\ + }\ + } while (0) -static void -process_xyza_i(struct stream *colour, struct stream *alpha, size_t n) -{ - size_t i; - double a; - for (i = 0; i < n; i += colour->pixel_size) { - a = 1 - ((double *)(alpha->buf + i))[1]; - a *= ((double *)(alpha->buf + i))[3]; - ((double *)(colour->buf + i))[3] *= a; - } -} +static void process_xyza (struct stream *colour, struct stream *alpha, size_t n) {PROCESS(double,);} +static void process_xyza_i (struct stream *colour, struct stream *alpha, size_t n) {PROCESS(double, 1 -);} +static void process_xyzaf (struct stream *colour, struct stream *alpha, size_t n) {PROCESS(float,);} +static void process_xyzaf_i(struct stream *colour, struct stream *alpha, size_t n) {PROCESS(float, 1 -);} int main(int argc, char *argv[]) @@ -56,6 +48,8 @@ main(int argc, char *argv[]) if (!strcmp(colour.pixfmt, "xyza")) process = invert ? process_xyza_i : process_xyza; + else if (!strcmp(colour.pixfmt, "xyza f")) + process = invert ? process_xyzaf_i : process_xyzaf; else eprintf("pixel format %s is not supported, try xyza\n", colour.pixfmt); |