Function

CoglMetaTextureCallback

Declaration 

void
(* CoglMetaTextureCallback) (
  CoglTexture* sub_texture,
  const float* sub_texture_coords,
  const float* meta_coords,
  void* user_data
)

Description [src]

A callback used with cogl_meta_texture_foreach_in_region() to retrieve details of all the low-level CoglTextures that make up a given CoglMetaTexture.

Parameters

sub_texture

Type: CoglTexture

A low-level CoglTexture making up part of a CoglMetaTexture.

The data is owned by the caller of the function.
sub_texture_coords

Type: const float*

A float 4-tuple ordered like (tx1,ty1,tx2,ty2) defining what region of the current sub_texture maps to a sub-region of a CoglMetaTexture. (tx1,ty1) is the top-left sub-region coordinate and (tx2,ty2) is the bottom-right. These are low-level texture coordinates.

The data is owned by the caller of the function.
meta_coords

Type: const float*

A float 4-tuple ordered like (tx1,ty1,tx2,ty2) defining what sub-region of a CoglMetaTexture this low-level sub_texture maps too. (tx1,ty1) is the top-left sub-region coordinate and (tx2,ty2) is the bottom-right. These are high-level meta-texture coordinates.

The data is owned by the caller of the function.
user_data

Type: void*

A private pointer passed to cogl_meta_texture_foreach_in_region().

The argument can be NULL.
The data is owned by the caller of the function.