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These functions allow high-level textures to be created that represent a sub-region of another texture. For example these can be used to implement custom texture atlasing schemes.
CoglSubTexture * cogl_sub_texture_new (CoglContext *ctx,CoglTexture *parent_texture,int sub_x,int sub_y,int sub_width,int sub_height);
Creates a high-level CoglSubTexture representing a sub-region of
any other CoglTexture. The sub-region must strictly lye within the
bounds of the parent_texture
. The returned texture implements the
CoglMetaTexture interface because it's not a low level texture
that hardware can understand natively.
cogl_rectangle() or other APIs documented to understand the
CoglMetaTexture interface then you need to use the
CoglMetaTexture interface to resolve a CoglSubTexture into a
low-level texture before drawing.| ctx | A CoglContext pointer | |
| parent_texture | The full texture containing a sub-region you want to make a CoglSubTexture from. | |
| sub_x | The top-left x coordinate of the parent region to make a texture from. | |
| sub_y | The top-left y coordinate of the parent region to make a texture from. | |
| sub_width | The width of the parent region to make a texture from. | |
| sub_height | The height of the parent region to make a texture from. | 
 A newly allocated CoglSubTexture
representing a sub-region of parent_texture
. 
[transfer full]
Since: 1.10
Stability Level: Unstable
CoglBool
cogl_is_sub_texture (void *object);
Checks whether object
 is a CoglSubTexture.
Since: 1.10
Stability Level: Unstable