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Improve anti-aliased drawing related docs

master
Christoph M. Becker 2016-10-02 11:54:36 +02:00
parent 30453e94b2
commit ddddd0a2ba
1 changed files with 34 additions and 6 deletions
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40
src/gd.c
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@ -3753,9 +3753,26 @@ BGD_DECLARE(void) gdImageSetTile (gdImagePtr im, gdImagePtr tile)
}
}
/*
Function: gdImageSetAntiAliased
*/
/**
* Function: gdImageSetAntiAliased
*
* Set the color for subsequent anti-aliased drawing
*
* If <gdAntiAliased> is passed as color to drawing operations that support
* anti-aliased drawing (such as <gdImageLine> and <gdImagePolygon>), the actual
* color to be used can be set with this function.
*
* Example: draw an anti-aliased blue line:
* | gdImageSetAntiAliased(im, gdTrueColorAlpha(0, 0, gdBlueMax, gdAlphaOpaque));
* | gdImageLine(im, 10,10, 20,20, gdAntiAliased);
*
* Parameters:
* im - The image.
* c - The color.
*
* See also:
* - <gdImageSetAntiAliasedDontBlend>
*/
BGD_DECLARE(void) gdImageSetAntiAliased (gdImagePtr im, int c)
{
im->AA = 1;
@ -3763,9 +3780,20 @@ BGD_DECLARE(void) gdImageSetAntiAliased (gdImagePtr im, int c)
im->AA_dont_blend = -1;
}
/*
Function: gdImageSetAntiAliasedDontBlend
*/
/**
* Function: gdImageSetAntiAliasedDontBlend
*
* Set the color and "dont_blend" color for subsequent anti-aliased drawing
*
* This extended variant of <gdImageSetAntiAliased> allows to also specify a
* (background) color that will not be blended in anti-aliased drawing
* operations.
*
* Parameters:
* im - The image.
* c - The color.
* dont_blend - Whether to blend.
*/
BGD_DECLARE(void) gdImageSetAntiAliasedDontBlend (gdImagePtr im, int c, int dont_blend)
{
im->AA = 1;