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glcolorconvert: convert xRGB into ARGB properly

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The alpha channel might not be the last component so check which one
it is in and clobber that one instead.
This commit is contained in:
Matthew Waters 2014-09-30 14:46:14 +10:00 committed by Tim-Philipp Müller
parent 652753de18
commit e6bd70d580
1 changed files with 11 additions and 2 deletions
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13
gst-libs/gst/gl/gstglcolorconvert.c
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@ -673,8 +673,17 @@ _RGB_to_RGB (GstGLColorConvert * convert)
info->in_n_textures = 1;
info->out_n_textures = 1;
if (_is_RGBx (in_format))
alpha = g_strdup_printf ("t.%c = 1.0;", pixel_order[3]);
if (_is_RGBx (in_format)) {
int i;
char input_alpha_channel = 'a';
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
if (in_format_str[i] == 'X' || in_format_str[i] == 'x') {
input_alpha_channel = _index_to_shader_swizzle (i);
break;
}
}
alpha = g_strdup_printf ("t.%c = 1.0;", input_alpha_channel);
}
info->frag_prog = g_strdup_printf (frag_REORDER, alpha ? alpha : "",
pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3]);
info->shader_tex_names[0] = "tex";