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