Content-type: text/html Man page of mlib_GraphicsDrawEllipse

mlib_GraphicsDrawEllipse

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
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NAME

mlib_GraphicsDrawEllipse, mlib_GraphicsDrawEllipse_8, mlib_GraphicsDrawEllipse_32, mlib_GraphicsDrawEllipse_X_8, mlib_GraphicsDrawEllipse_X_32, mlib_GraphicsDrawEllipse_A_8, mlib_GraphicsDrawEllipse_A_32, mlib_GraphicsDrawEllipse_B_8, mlib_GraphicsDrawEllipse_B_32, mlib_GraphicsDrawEllipse_AB_8, mlib_GraphicsDrawEllipse_AB_32 - draw ellipse  

SYNOPSIS

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

mlib_status mlib_GraphicsDrawEllipse_8(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c);

mlib_status mlib_GraphicsDrawEllipse_32(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c);

mlib_status mlib_GraphicsDrawEllipse_X_8(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c,
    mlib_s32 c2);

mlib_status mlib_GraphicsDrawEllipse_X_32(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c,
    mlib_s32 c2);

mlib_status mlib_GraphicsDrawEllipse_A_8(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c);

mlib_status mlib_GraphicsDrawEllipse_A_32(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c);

mlib_status mlib_GraphicsDrawEllipse_B_8(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c,
    mlib_s32 alpha);

mlib_status mlib_GraphicsDrawEllipse_B_32(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c,
    mlib_s32 alpha);

mlib_status mlib_GraphicsDrawEllipse_AB_8(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c,
    mlib_s32 alpha);

mlib_status mlib_GraphicsDrawEllipse_AB_32(mlib_image *buffer, mlib_s16 x,
    mlib_s16 y, mlib_s32 a, mlib_s32 b, mlib_f32 t, mlib_s32 c,
    mlib_s32 alpha);

 

DESCRIPTION

Each of the mlib_GraphicsDrawEllipse_*() functions draws an ellipse with the center at (x, y), major semiaxis a, and minor semiaxis b. The angle of the major semiaxis is t counterclockwise from the X axis.

Each of the mlib_GraphicsDrawEllipse_X_*() functions draws an ellipse in Xor mode as follows:

    data[x,y] ^= c ^ c2

Each of the mlib_GraphicsDrawEllipse_A_*() functions draws an ellipse with antialiasing.

Each of the mlib_GraphicsDrawEllipse_B_*() functions draws an ellipse with alpha blending as follows:

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

Each of the mlib_GraphicsDrawEllipse_A_*() functions draws an ellipse with antialiasing and alpha blending.  

PARAMETERS

Each of the functions takes some of the following arguments:

buffer

Pointer to the image into which the function is drawing.

x

X coordinate of the center.

y

Y coordinate of the center.

a

Major semiaxis of the ellipse.

b

Minor semiaxis of the ellipse.

t

Angle of major semiaxis in radians.

c

Color used in the drawing.

c2

Alternation color.

alpha

Alpha value for blending. 0 ≤ alpha ≤ 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 TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

SEE ALSO

mlib_GraphicsDrawArc(3MLIB), mlib_GraphicsDrawCircle(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:37:54 GMT, October 02, 2010