diff options
Diffstat (limited to 'src/blind-gauss-blur.c')
| -rw-r--r-- | src/blind-gauss-blur.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/src/blind-gauss-blur.c b/src/blind-gauss-blur.c index 66583df..983d6cd 100644 --- a/src/blind-gauss-blur.c +++ b/src/blind-gauss-blur.c @@ -1,16 +1,18 @@ /* See LICENSE file for copyright and license details. */ #include "common.h" -USAGE("[-j jobs] [-s spread | -s 'auto'] [-achvy] sd-stream") +USAGE("[-j jobs] [-s spread | -s 'auto'] [-acghvy] sd-stream") static int chroma = 0; static int noalpha = 0; +static int glow = 0; static int vertical = 0; static int horizontal = 0; static int measure_y_only = 0; static int auto_spread = 0; static size_t jobs = 1; static size_t spread = 0; +static void *original = NULL; /* * This is not a regular simple gaussian blur implementation. @@ -126,6 +128,7 @@ static size_t spread = 0; \ pixel_t *restrict clr = (pixel_t *)cbuf;\ pixel_t *restrict sig = (pixel_t *)sbuf;\ + pixel_t *restrict orig = original;\ pixel_t *img = (pixel_t *)output;\ pixel_t c, k;\ size_t x1, y1, i1, x2, y2, i2;\ @@ -139,6 +142,8 @@ static size_t spread = 0; x2end = colour->width;\ y2end = colour->height;\ \ + if (glow)\ + memcpy(orig, clr, colour->frame_size);\ if (chroma || !noalpha) {\ start = 0, end = colour->height;\ is_master = efork_jobs(&start, &end, jobs, &children);\ @@ -155,6 +160,12 @@ static size_t spread = 0; }\ }\ \ + /* store original image */\ + if (glow) {\ + i1 = start * colour->width;\ + memcpy(orig + i1, clr + i1, (end - start) * colour->width * sizeof(*clr));\ + }\ + \ /* convert colour model */\ if (chroma) {\ i1 = start * colour->width;\ @@ -247,6 +258,19 @@ static size_t spread = 0; }\ }\ \ + /* apply glow */\ + if (glow) {\ + i1 = start * colour->width;\ + for (y1 = start; y1 < end; y1++) {\ + for (x1 = 0; x1 < colour->width; x1++, i1++) {\ + img[i1][0] = 1 - (1 - img[i1][0]) * (1 - orig[i1][0]);\ + img[i1][1] = 1 - (1 - img[i1][1]) * (1 - orig[i1][1]);\ + img[i1][2] = 1 - (1 - img[i1][2]) * (1 - orig[i1][2]);\ + img[i1][3] = 1 - (1 - img[i1][3]) * (1 - orig[i1][3]);\ + }\ + }\ + }\ + \ /* unpremultiply alpha channel */\ i1 = start * colour->width;\ for (y1 = start; y1 < end; y1++) {\ @@ -301,6 +325,9 @@ main(int argc, char *argv[]) case 'c': chroma = 1; break; + case 'g': + glow = 1; + break; case 'h': horizontal = 1; break; @@ -340,8 +367,12 @@ main(int argc, char *argv[]) if (jobs > colour.height) jobs = colour.height; + if (glow) + original = emalloc(colour.frame_size); + fprint_stream_head(stdout, &colour); efflush(stdout, "<stdout>"); process_each_frame_two_streams(&colour, &sigma, STDOUT_FILENO, "<stdout>", process); + free(original); return 0; } |