Vips.Image.map (original) (raw)
Method
VipsImagemap
Declaration [src]
void*
vips_image_map (
VipsImage* image,
VipsImageMapFn fn,
void* a
)
Description [src]
This function calls fn for every header field, including every item of metadata.
Like all _map functions, the user function should return NULL to continue iteration, or a non-NULL pointer to indicate early termination.
Parameters
fn
Type: VipsImageMapFn
Function to call for each header field.
a
Type: void*
User data for fn.
| The argument can be NULL. |
|---|
| The data is owned by the caller of the method. |
Return value
Type: void*
NULL on success, the failing pointer otherwise.
| The returned data is owned by the instance. |
|---|
| The return value can be NULL. |