Creates an image surface for the provided pixel data. The output
buffer must be kept around until the
CairoSurface is destroyed
cairoSurfaceFinish is called on the surface. The initial
data will be used as the initial image contents; you
must explicitly clear the buffer, using, for example,
cairoFill if you want it cleared.
[char] a pointer to a buffer supplied by the application in which to write contents. This pointer must be suitably aligned for any kind of variable, (for example, a pointer returned by malloc).
[integer] the width of the image to be stored in the buffer
[integer] the height of the image to be stored in the buffer
[integer] the number of bytes between the start of rows in the
buffer as allocated. This value should always be computed by
Note that the stride may be larger than
width*bytes_per_pixel to provide proper alignment for each pixel
and row. This alignment is required to allow high-performance rendering
within cairo. The correct way to obtain a legal stride value is to
cairoFormatStrideForWidth with the desired format and
maximum image width value, and the use the resulting stride value
to allocate the data and to create the image surface. See
cairoFormatStrideForWidth for example code.
CairoSurface] a pointer to the newly created surface. The caller
owns the surface and should call
cairoSurfaceDestroy when done
This function always returns a valid pointer, but it will return a
pointer to a "nil" surface in the case of an error such as out of
memory or an invalid stride value. In case of invalid stride value
the error status of the returned surface will be
CAIRO_STATUS_INVALID_STRIDE. You can use
cairoSurfaceStatus to check for this.
cairoSurfaceSetUserData for a means of attaching a
destroy-notification fallback to the surface if necessary.
Derived by RGtkGen from GTK+ documentation
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