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| author | Nicolas Dufresne <nicolas.dufresne@collabora.co.uk> | 2015-08-08 14:45:42 -0400 |
|---|---|---|
| committer | Nicolas Dufresne <nicolas.dufresne@collabora.co.uk> | 2015-08-08 16:32:53 -0400 |
| commit | d6baf8dcc7bcc3799a6b7e2e54691b59e5f793d9 (patch) | |
| tree | 72cd0ec1626f0319451daea55d80f95174eae12a /gst-libs | |
| parent | 6b8cf8419d8ea80081de8150a6b1c3cf763c4d69 (diff) | |
| download | gstreamer-plugins-bad-d6baf8dcc7bcc3799a6b7e2e54691b59e5f793d9.tar.gz | |
gloverlaycompositor: Add shader to convert BGRA/ARGB -> RGBA
Depending on the bytes order we will get BGRA (little) and ARGB (big)
from the composition overlay buffer while our GL code expects RGBA. Add
a fragment shader that do this conversion.
https://bugzilla.gnome.org/show_bug.cgi?id=752842
Diffstat (limited to 'gst-libs')
| -rw-r--r-- | gst-libs/gst/gl/gstgloverlaycompositor.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/gst-libs/gst/gl/gstgloverlaycompositor.c b/gst-libs/gst/gl/gstgloverlaycompositor.c index 5c6b02b3c..7efef3f13 100644 --- a/gst-libs/gst/gl/gstgloverlaycompositor.c +++ b/gst-libs/gst/gl/gstgloverlaycompositor.c @@ -44,6 +44,24 @@ typedef struct _GstGLCompositionOverlayClass GstGLCompositionOverlayClass; static GType gst_gl_composition_overlay_get_type (void); +/* *INDENT-OFF* */ +const gchar *fragment_shader = + "#ifdef GL_ES\n" + "precision mediump float;\n" + "#endif\n" + "varying vec2 v_texcoord;\n" + "uniform sampler2D tex;\n" + "void main(void)\n" + "{\n" + " vec4 t = texture2D(tex, v_texcoord);\n" +#if G_BYTE_ORDER == G_LITTLE_ENDIAN + " gl_FragColor = t.bgra;\n" +#else + " gl_FragColor = t.gbar;\n" +#endif + "}"; +/* *INDENT-ON* */ + struct _GstGLCompositionOverlay { GstObject parent; @@ -408,8 +426,8 @@ gst_gl_overlay_compositor_init_gl (GstGLContext * context, GstGLOverlayCompositor *compositor = (GstGLOverlayCompositor *) compositor_pointer; - if (!gst_gl_shader_compile_with_default_vf_and_check - (compositor->shader, &compositor->position_attrib, + if (!gst_gl_shader_compile_with_default_v_and_check (compositor->shader, + fragment_shader, &compositor->position_attrib, &compositor->texcoord_attrib)) { GST_ERROR ("could not initialize shader."); } |