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FS-7550 quick and dirty tweak for overlay, maybe need furthur tweaks but this should work with most transparent pngs

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Seven Du 2015-05-16 07:22:23 +08:00 committed by Michael Jerris
parent 81ef7703bd
commit 8e1dc361e0
1 changed files with 9 additions and 3 deletions
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6
src/switch_core_video.c
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@ -480,9 +480,15 @@ SWITCH_DECLARE(void) switch_img_overlay(switch_image_t *IMG, switch_image_t *img
switch_img_get_rgb_pixel(IMG, &RGB, x + j, i); switch_img_get_rgb_pixel(IMG, &RGB, x + j, i);
switch_img_get_rgb_pixel(img, &rgb, j + xoff, i - y + yoff); switch_img_get_rgb_pixel(img, &rgb, j + xoff, i - y + yoff);
if (rgb.a > 0) {
c.r = ((RGB.r * (255 - alpha)) >> 8) + ((rgb.r * alpha) >> 8); c.r = ((RGB.r * (255 - alpha)) >> 8) + ((rgb.r * alpha) >> 8);
c.g = ((RGB.g * (255 - alpha)) >> 8) + ((rgb.g * alpha) >> 8); c.g = ((RGB.g * (255 - alpha)) >> 8) + ((rgb.g * alpha) >> 8);
c.b = ((RGB.b * (255 - alpha)) >> 8) + ((rgb.b * alpha) >> 8); c.b = ((RGB.b * (255 - alpha)) >> 8) + ((rgb.b * alpha) >> 8);
} else {
c.r = RGB.r;
c.g = RGB.g;
c.b = RGB.b;
}
switch_img_draw_pixel(IMG, x + j, i, &c); switch_img_draw_pixel(IMG, x + j, i, &c);
} }