[cogl] Add support for X101010 and 2101010 pixel formats to fallback OpenGL rendering

[Robert Bragg <rbragg src gnome org>]

commit c8674ef2bc9aef5f8375fb8f291b895219d1777e
Author: Damien Leone <dleone nvidia com>
Date:   Mon Nov 21 15:41:40 2011 -0800

    Add support for X101010 and 2101010 pixel formats to fallback OpenGL rendering
    
    https://bugzilla.gnome.org/show_bug.cgi?id=660188
    
    edit: tweaked the internal format returned by pixel_format_to_gl();
    handled 1010102 formats and rebased -- Robert Bragg
    
    Reviewed-by: Robert Bragg <robert linux intel com>
    Reviewed-by: Neil Roberts <neil linux intel com>

 cogl/cogl-util.c                        |    5 +++++
 cogl/driver/gl/cogl-texture-driver-gl.c |   24 ++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/cogl/cogl-util.c b/cogl/cogl-util.c
index 6f56555..0b1b4b7 100644
--- a/cogl/cogl-util.c
+++ b/cogl/cogl-util.c
@@ -167,6 +167,11 @@ _cogl_util_pixel_format_from_masks_real (unsigned long r_mask,
     {
       return COGL_PIXEL_FORMAT_ARGB_8888_PRE;
     }
+  else if ((depth == 30 || depth == 32) &&
+           r_mask == 0x3ff00000 && g_mask == 0xffc00 && b_mask == 0x3ff)
+    {
+      return COGL_PIXEL_FORMAT_ARGB_2101010_PRE;
+    }
   else if (depth == 16 && bpp == 16 &&
            r_mask == 0xf800 && g_mask == 0x7e0 && b_mask == 0x1f)
     {
diff --git a/cogl/driver/gl/cogl-texture-driver-gl.c b/cogl/driver/gl/cogl-texture-driver-gl.c
index deda4c6..2724811 100644
--- a/cogl/driver/gl/cogl-texture-driver-gl.c
+++ b/cogl/driver/gl/cogl-texture-driver-gl.c
@@ -466,6 +466,30 @@ _cogl_texture_driver_pixel_format_to_gl (CoglPixelFormat  format,
 #endif
       break;
 
+    case COGL_PIXEL_FORMAT_RGBA_1010102:
+      glintformat = GL_RGBA;
+      glformat = GL_RGBA;
+      gltype = GL_UNSIGNED_INT_10_10_10_2;
+      break;
+
+    case COGL_PIXEL_FORMAT_BGRA_1010102:
+      glintformat = GL_RGBA;
+      glformat = GL_BGRA;
+      gltype = GL_UNSIGNED_INT_10_10_10_2;
+      break;
+
+    case COGL_PIXEL_FORMAT_ABGR_2101010:
+      glintformat = GL_RGBA;
+      glformat = GL_RGBA;
+      gltype = GL_UNSIGNED_INT_2_10_10_10_REV;
+      break;
+
+    case COGL_PIXEL_FORMAT_ARGB_2101010:
+      glintformat = GL_RGBA;
+      glformat = GL_BGRA;
+      gltype = GL_UNSIGNED_INT_2_10_10_10_REV;
+      break;
+
       /* The following three types of channel ordering
        * are always defined using system word byte
        * ordering (even according to GLES spec) */