man pages section 3: Multimedia Library Functions

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Updated: July 2014
 
 

mlib_GraphicsDrawPolypoint_32(3MLIB)

Name

mlib_GraphicsDrawPointSet, mlib_GraphicsDrawPointSet_8, mlib_GraphicsDrawPointSet_32, mlib_GraphicsDrawPointSet_X_8, mlib_GraphicsDrawPointSet_X_32, mlib_GraphicsDrawPointSet_B_8, mlib_GraphicsDrawPointSet_B_32, mlib_GraphicsDrawPolypoint_8, mlib_GraphicsDrawPolypoint_32, mlib_GraphicsDrawPolypoint_X_8, mlib_GraphicsDrawPolypoint_X_32, mlib_GraphicsDrawPolypoint_B_8, mlib_GraphicsDrawPolypoint_B_32 - draw a set of points

Synopsis

cc [ flag... ] file... –lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_GraphicsDrawPointSet_8(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c);
mlib_status mlib_GraphicsDrawPointSet_32(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c);
mlib_status mlib_GraphicsDrawPointSet_X_8(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints,
     mlib_s32 c, mlib_s32 c2);
mlib_status mlib_GraphicsDrawPointSet_X_32(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, 
     mlib_s32 c, mlib_s32 c2);
mlib_status mlib_GraphicsDrawPointSet_B_8(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c,
     mlib_s32 a);
mlib_status mlib_GraphicsDrawPointSet_B_32(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c,
     mlib_s32 a);
mlib_status mlib_GraphicsDrawPolypoint_8(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c);
mlib_status mlib_GraphicsDrawPolypoint_32(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c);
mlib_status mlib_GraphicsDrawPolypoint_X_8(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c,
     mlib_s32 c2);
mlib_status mlib_GraphicsDrawPolypoint_X_32(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c,
     mlib_s32 c2);
mlib_status mlib_GraphicsDrawPolypoint_B_8(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c,
     mlib_s32 c2);
mlib_status mlib_GraphicsDrawPolypoint_B_32(mlib_image *buffer,
     const mlib_s16 *x, const mlib_s16 *y, mlib_s32 npoints, mlib_s32 c,
     mlib_s32 c2);

Description

Each of the mlib_GraphicsDrawPointSet_*() and mlib_GraphicsDrawPolypoint_*() functions draws a set of points at (x1,y1), (x2,y2), ..., and (xn,yn).

Each of the mlib_GraphicsDrawPointSet_X_*() and mlib_GraphicsDrawPolypoint_X_*() functions draws a set of points at (x1,y1), (x2,y2), ..., and (xn,yn) in Xor mode as follows:

    data[x,y] ^= c ^ c2

Each of the mlib_GraphicsDrawPointSet_B_*() and mlib_GraphicsDrawPolypoint_B_*() functions draws a set of points at (x1,y1), (x2,y2), ..., and (xn,yn) with alpha blending as follows:

    data[x,y] = (data[x,y] * (255 - a) + c * a) / 255

The mlib_GraphicsDrawPolypoint_*() functions are aliases of the mlib_GraphicsDrawPointSet_*() functions.

Parameters

Each of the functions takes some of the following arguments:

buffer

Pointer to the image into which the function is drawing.

x

Pointer to array of X coordinates of the points.

y

Pointer to array of Y coordinates of the points.

npoints

Number of points in the arrays.

c

Color used in the drawing.

c2

Alternation color.

a

Alpha value for blending. 0 ≤ a ≤ 255.

Return Values

Each of the functions 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 also

mlib_GraphicsDrawPoint(3MLIB), attributes (5)