mlib_ImageZoomBlend(3MLIB)mediaLib Library Functionsmlib_ImageZoomBlend(3MLIB)NAMEmlib_ImageZoomBlend - image scaling with alpha blending
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageZoomBlend(mlib_image *dst, const mlib_image *src,
mlib_d64 zoomx, mlib_d64 zoomy, mlib_filter filter, mlib_edge edge,
mlib_blend blend, mlib_s32 alpha, mlib_s32 cmask);
DESCRIPTION
The mlib_ImageZoomBlend() function will enlarge or minify the source
image by the X and Y zoom factors and blend it with the destination
image.
This function is a special case of mlib_ImageZoomTranslateBlend() with
the center of the source image being mapped to the center of the desti‐
nation image.
The center of the upper-left corner pixel of an image is considered to
be located at (0.5, 0.5).
Both src and dst must be of type MLIB_BYTE. They can have either 3 or 4
channels.
The src image cannot have width or height larger than 32767.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to first source image.
zoomx X zoom factor. zoomx > 0.0.
zoomy Y zoom factor. zoomy > 0.0.
filter Type of resampling filter. It can be one of the following:
MLIB_NEAREST
MLIB_BILINEAR
MLIB_BICUBIC
MLIB_BICUBIC2
edge Type of edge condition. It can be one of the following:
MLIB_EDGE_DST_NO_WRITE
MLIB_EDGE_DST_FILL_ZERO
MLIB_EDGE_OP_NEAREST
MLIB_EDGE_SRC_EXTEND
MLIB_EDGE_SRC_EXTEND_INDEF
MLIB_EDGE_SRC_PADDED
blend Type of alpha blending. It can be one of the following:
MLIB_BLEND_GTK_SRC
MLIB_BLEND_GTK_SRC_OVER
MLIB_BLEND_GTK_SRC_OVER2
alpha Overall alpha for blending.
cmask Channel mask to indicate the alpha channel.
RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns
MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmlib_ImageZoomTranslateBlend(3MLIB), mlib_ImageZoomTranslateTable‐
Blend(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageZoomBlend(3MLIB)
