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Code Issues 1 Projects Releases Wiki Activity

textoverlay: also draw shaded backgrounds for RGB and BGR

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=687817
This commit is contained in:
Tim-Philipp Müller 2012-11-07 13:25:13 +00:00
parent caad241432
commit bd578c1dd4
1 changed files with 30 additions and 0 deletions
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30
ext/pango/gstbasetextoverlay.c
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@ -1514,6 +1514,32 @@ gst_base_text_overlay_shade_xRGB (GstBaseTextOverlay * overlay,
}
}
/* FIXME: orcify */
static void
gst_base_text_overlay_shade_rgb24 (GstBaseTextOverlay * overlay,
GstVideoFrame * frame, gint x0, gint x1, gint y0, gint y1)
{
const int pstride = 3;
gint y, x, stride, shading_val, tmp;
guint8 *p;
shading_val = overlay->shading_value;
stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
for (y = y0; y < y1; ++y) {
p = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
p += (y * stride) + (x0 * pstride);
for (x = x0; x < x1; ++x) {
tmp = *p + shading_val;
*p++ = CLAMP (tmp, 0, 255);
tmp = *p + shading_val;
*p++ = CLAMP (tmp, 0, 255);
tmp = *p + shading_val;
*p++ = CLAMP (tmp, 0, 255);
}
}
}
#define ARGB_SHADE_FUNCTION(name, OFFSET) \
static inline void \
gst_base_text_overlay_shade_##name (GstBaseTextOverlay * overlay, GstVideoFrame * dest, \
@ -1631,6 +1657,10 @@ gst_base_text_overlay_shade_background (GstBaseTextOverlay * overlay,
case GST_VIDEO_FORMAT_BGRA:
gst_base_text_overlay_shade_BGRA (overlay, frame, x0, x1, y0, y1);
break;
case GST_VIDEO_FORMAT_BGR:
case GST_VIDEO_FORMAT_RGB:
gst_base_text_overlay_shade_rgb24 (overlay, frame, x0, x1, y0, y1);
break;
default:
GST_FIXME_OBJECT (overlay, "implement background shading for format %s",
gst_video_format_to_string (GST_VIDEO_FRAME_FORMAT (frame)));