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FS-10140: [core] add switch_img_grey, makes i420 switch_img_t image grey scale

This commit is contained in:
Mike Jerris 2017-03-16 11:09:29 -05:00
parent 0021530faf
commit 8d4e72af16
2 changed files with 29 additions and 0 deletions
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2
src/include/switch_core_video.h
View File

@ -315,6 +315,8 @@ SWITCH_DECLARE(switch_image_t *) switch_img_copy_rect(switch_image_t *img, uint3
*/
SWITCH_DECLARE(void) switch_img_fill(switch_image_t *img, int x, int y, int w, int h, switch_rgb_color_t *color);
SWITCH_DECLARE(void) switch_img_grey(switch_image_t *img, int x, int y, int w, int h);
SWITCH_DECLARE(void) switch_img_fill_noalpha(switch_image_t *img, int x, int y, int w, int h, switch_rgb_color_t *color);
/*!\brief Set RGB color with a string

27
src/switch_core_video.c
View File

@ -1410,6 +1410,33 @@ SWITCH_DECLARE(void) switch_img_fill_noalpha(switch_image_t *img, int x, int y,
#endif
}
SWITCH_DECLARE(void) switch_img_grey(switch_image_t *img, int x, int y, int w, int h)
{
#ifdef SWITCH_HAVE_YUV
int len, i, max_h;
if (x < 0 || y < 0 || x >= img->d_w || y >= img->d_h) return;
if (img->fmt == SWITCH_IMG_FMT_I420) {
max_h = MIN(y + h, img->d_h);
len = MIN(w, img->d_w - x);
if (x & 1) { x++; len--; }
if (y & 1) y++;
if (len <= 0) return;
if ((len & 1) && (x + len) < img->d_w - 1) len++;
len /= 2;
for (i = y; i < max_h; i += 2) {
memset(img->planes[SWITCH_PLANE_U] + img->stride[SWITCH_PLANE_U] * (i / 2) + x / 2, 0, len);
memset(img->planes[SWITCH_PLANE_V] + img->stride[SWITCH_PLANE_V] * (i / 2) + x / 2, 0, len);
}
}
#endif
}
SWITCH_DECLARE(void) switch_img_fill(switch_image_t *img, int x, int y, int w, int h, switch_rgb_color_t *color)
{
#ifdef SWITCH_HAVE_YUV