texture: Make CoglTextureRectangle experimentally public

This exposes CoglTextureRectangle in the experimental cogl 2.0 api. For
now we just expose a single constructor;
cogl_texture_rectangle_new_with_size() but we can add more later.

This is part of going work to improve our texture apis with more
emphasis on providing low-level access to the varying semantics of
different texture types understood by the gpu instead of only trying to
present a lowest common denominator api.

CoglTextureRectangle is notably useful for never being restricted to
power of two sizes and for being sampled with non-normalized texture
coordinates which can be convenient for use a lookup tables in glsl due
to not needing separate uniforms for mapping normalized coordinates to
texels. Unlike CoglTexture2D though rectangle textures can't have a
mipmap and they only support the _CLAMP_TO_EDGE wrap mode.

Applications wanting to use CoglTextureRectangle should first check
cogl_has_feature (COGL_FEATURE_ID_TEXTURE_RECTANGLE).

Reviewed-by: Neil Roberts <neil@linux.intel.com>

1 files changed, 2 insertions, 16 deletions

diff --git a/cogl/cogl-texture-rectangle-private.h b/cogl/cogl-texture-rectangle-private.h
index 07eca5e8..dde91097 100644
--- a/cogl/cogl-texture-rectangle-private.h
+++ b/cogl/cogl-texture-rectangle-private.h
@@ -24,14 +24,9 @@
 #ifndef __COGL_TEXTURE_RECTANGLE_H
 #define __COGL_TEXTURE_RECTANGLE_H
 
-#include "cogl-handle.h"
 #include "cogl-pipeline-private.h"
 #include "cogl-texture-private.h"
 
-#define COGL_TEXTURE_RECTANGLE(tex) ((CoglTextureRectangle *) tex)
-
-typedef struct _CoglTextureRectangle CoglTextureRectangle;
-
 struct _CoglTextureRectangle
 {
   CoglTexture     _parent;
@@ -52,24 +47,15 @@ struct _CoglTextureRectangle
   gboolean        is_foreign;
 };
 
-gboolean
-_cogl_is_texture_rectangle (void *object);
-
 GQuark
 _cogl_handle_texture_rectangle_get_type (void);
 
-CoglHandle
-_cogl_texture_rectangle_new_with_size (unsigned int     width,
-                                       unsigned int     height,
-                                       CoglTextureFlags flags,
-                                       CoglPixelFormat  internal_format);
-
-CoglHandle
+CoglTextureRectangle *
 _cogl_texture_rectangle_new_from_bitmap (CoglBitmap      *bmp,
                                          CoglTextureFlags flags,
                                          CoglPixelFormat  internal_format);
 
-CoglHandle
+CoglTextureRectangle *
 _cogl_texture_rectangle_new_from_foreign (GLuint gl_handle,
                                           GLuint width,
                                           GLuint height,