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- #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
-