| The imgbuffer class is a child of the binary class. Its purpose is to hold an image file in memory. It can contain a png, a jpeg, or any GD supported image file type. It ensure that the proper destructor is called whenever the object is destroyed, even when the destruction occurs during the garbage collection. As needed when using GD, imgbuffer-destructor makes use of gdFree() instead of free() or delete. |
| Function Type | subr |
| Arguments | the symbol imgbuffer, mandatory integer, mandatory unsigned integer |
| Return Value | an imagebuffer object |
| Description | never call imagebuffer-constructor directly but always through (make-instance) ; the first argument gives the length of the block allocated in binary space, the second argument gives the address where the block already exist as GD image segment; actually there is no need to call this constructor because it is used by the conversion functions like gdimage-png |
| Example | (make-instance imgbuffer size address) |
| Function Type | subr |
| Arguments | an imagebuffer object |
| Return Value | nil |
| Description | never call imagebuffer-destructor directly but always through destroy-instance ; destroys an imagebuffer object, releasing properly the associated memory resources |
| Example | (destroy-instance buffer) |