Constructor
CoglSubTexturenew
Declaration [src]
CoglTexture*
cogl_sub_texture_new (
CoglContext* ctx,
CoglTexture* parent_texture,
int sub_x,
int sub_y,
int sub_width,
int sub_height
)
Description [src]
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.
Remember: Unless you are using high level drawing APIs such
as 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.
Parameters
ctx-
Type:
CoglContextA
CoglContextpointer.The data is owned by the caller of the function. parent_texture-
Type:
CoglTextureThe full texture containing a sub-region you want to make a
CoglSubTexturefrom.The data is owned by the caller of the function. sub_x-
Type:
intThe top-left x coordinate of the parent region to make a texture from.
sub_y-
Type:
intThe top-left y coordinate of the parent region to make a texture from.
sub_width-
Type:
intThe width of the parent region to make a texture from.
sub_height-
Type:
intThe height of the parent region to make a texture from.
Return value
Type: CoglTexture
A newly allocated CoglSubTexture
representing a sub-region of parent_texture.
| The caller of the function takes ownership of the data, and is responsible for freeing it. |