/usr/include/gdfx.h is in libgd2-noxpm-dev 2.0.36~rc1~dfsg-6ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | #ifdef __cplusplus
extern "C" {
#endif
#ifndef GDFX_H
#define GDFX_H 1
#include "gd.h"
/* im MUST be square, but can have any size. Returns a new image
of width and height radius * 2, in which the X axis of
the original has been remapped to theta (angle) and the Y axis
of the original has been remapped to rho (distance from center).
This is known as a "polar coordinate transform." */
BGD_DECLARE(gdImagePtr) gdImageSquareToCircle(gdImagePtr im, int radius);
/* Draws the text 'top' and 'bottom' on 'im', curved along the
edge of a circle of radius 'radius', with its
center at 'cx' and 'cy'. 'top' is written clockwise
along the top; 'bottom' is written counterclockwise
along the bottom. 'textRadius' determines the 'height'
of each character; if 'textRadius' is 1/2 of 'radius',
characters extend halfway from the edge to the center.
'fillPortion' varies from 0 to 1.0, with useful values
from about 0.4 to 0.9, and determines how much of the
180 degrees of arc assigned to each section of text
is actually occupied by text; 0.9 looks better than
1.0 which is rather crowded. 'font' is a freetype
font; see gdImageStringFT. 'points' is passed to the
freetype engine and has an effect on hinting; although
the size of the text is determined by radius, textRadius,
and fillPortion, you should pass a point size that
'hints' appropriately -- if you know the text will be
large, pass a large point size such as 24.0 to get the
best results. 'fgcolor' can be any color, and may have
an alpha component, do blending, etc.
Returns 0 on success, or an error string. */
BGD_DECLARE(char *) gdImageStringFTCircle(
gdImagePtr im,
int cx,
int cy,
double radius,
double textRadius,
double fillPortion,
char *font,
double points,
char *top,
char *bottom,
int fgcolor);
/* 2.0.16:
* Sharpen function added on 2003-11-19
* by Paul Troughton (paul<dot>troughton<at>ieee<dot>org)
* Simple 3x3 convolution kernel
* Makes use of seperability
* Faster, but less flexible, than full-blown unsharp masking
* pct is sharpening percentage, and can be greater than 100
* Silently does nothing to non-truecolor images
* Silently does nothing for pct<0, as not a useful blurring function
* Leaves transparency/alpha-channel untouched
*/
BGD_DECLARE(void) gdImageSharpen (gdImagePtr im, int pct);
#endif /* GDFX_H */
#ifdef __cplusplus
}
#endif
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