Add _cogl_texture_get_type()

This adds an internal function to get the type of the underlying
hardware texture for any CoglTexture. It can return one of three
values to represent 2D textures, 3D textures or rectangle textures.
The idea is that this can be used as a replacement for
cogl_texture_get_gl_texture when only the target is required to make
it a bit less GL-centric. The implementation adds a new virtual
function which all of the texture backends now implement.

The enum is in a public header because a later patch will want to use
it from the CoglPipeline API. We may want to consider making the
function public too later.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/cogl/cogl-sub-texture.c b/cogl/cogl-sub-texture.c
index 3967ecd6..99ecfcc5 100644
--- a/cogl/cogl-sub-texture.c
+++ b/cogl/cogl-sub-texture.c
@@ -416,6 +416,14 @@ _cogl_sub_texture_get_height (CoglTexture *tex)
   return sub_tex->sub_height;
 }
 
+static CoglTextureType
+_cogl_sub_texture_get_type (CoglTexture *tex)
+{
+  CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
+
+  return _cogl_texture_get_type (sub_tex->full_texture);
+}
+
 static const CoglTextureVtable
 cogl_sub_texture_vtable =
   {
@@ -436,5 +444,6 @@ cogl_sub_texture_vtable =
     _cogl_sub_texture_get_gl_format,
     _cogl_sub_texture_get_width,
     _cogl_sub_texture_get_height,
+    _cogl_sub_texture_get_type,
     NULL /* is_foreign */
   };