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gl/colorconvert: fix up alpha clobbering

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Previously it would only work if the alpha value was in the last
component (RGBx, BGRx).  Now it works wherever the alpha value may
be (xRGB, xBGR, etc).
This commit is contained in:
Matthew Waters 2014-05-13 14:07:39 +10:00
parent f8d63c5ad9
commit b0a1e1f15b
1 changed files with 13 additions and 9 deletions
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22
gst-libs/gst/gl/gstglcolorconvert.c
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@ -133,7 +133,7 @@ static const gchar frag_REORDER[] =
"void main(void)\n"
"{\n"
" vec4 t = texture2D(tex, v_texcoord * tex_scale0);\n"
" %s;\n" /* clobber alpha channel? */
" %s\n" /* clobber alpha channel? */
" gl_FragColor = vec4(t.%c, t.%c, t.%c, t.%c);\n"
"}";
@ -674,15 +674,17 @@ _RGB_to_RGB (GstGLColorConvert * convert)
GstVideoFormat out_format = GST_VIDEO_INFO_FORMAT (&convert->out_info);
const gchar *out_format_str = gst_video_format_to_string (out_format);
gchar *pixel_order = _RGB_pixel_order (in_format_str, out_format_str);
const gchar *alpha = "";
gchar *alpha = NULL;
info->in_n_textures = 1;
info->out_n_textures = 1;
if (_is_RGBx (in_format))
alpha = "t.a = 1.0";
info->frag_prog = g_strdup_printf (frag_REORDER, alpha, pixel_order[0],
pixel_order[1], pixel_order[2], pixel_order[3]);
alpha = g_strdup_printf ("t.%c = 1.0;", pixel_order[3]);
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";
g_free (alpha);
}
static void
@ -855,23 +857,25 @@ _RGB_to_GRAY (GstGLColorConvert * convert)
GstVideoFormat in_format = GST_VIDEO_INFO_FORMAT (&convert->in_info);
const gchar *in_format_str = gst_video_format_to_string (in_format);
gchar *pixel_order = _RGB_pixel_order (in_format_str, "rgba");
const gchar *alpha = "";
gchar *alpha = NULL;
info->in_n_textures = 1;
info->out_n_textures = 1;
info->shader_tex_names[0] = "tex";
if (_is_RGBx (in_format))
alpha = "t.a = 1.0";
alpha = g_strdup_printf ("t.%c = 1.0;", pixel_order[3]);
switch (GST_VIDEO_INFO_FORMAT (&convert->out_info)) {
case GST_VIDEO_FORMAT_GRAY8:
info->frag_prog = g_strdup_printf (frag_REORDER, alpha, pixel_order[0],
pixel_order[0], pixel_order[0], pixel_order[3]);
info->frag_prog = g_strdup_printf (frag_REORDER, alpha ? alpha : "",
pixel_order[0], pixel_order[0], pixel_order[0], pixel_order[3]);
break;
default:
break;
}
g_free (alpha);
}
static void