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Clarify docs.

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This commit is contained in:
Alexei Podtelezhnikov 2019-04-23 21:51:42 -04:00
parent 6abce2c2b0
commit 432bb50ff5
1 changed files with 4 additions and 7 deletions
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11
include/freetype/ftimage.h
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@ -945,19 +945,16 @@ FT_BEGIN_HEADER
* This flag is set to indicate direct rendering. In this mode, client
* applications must provide their own span callback. This lets them
* directly draw or compose over an existing bitmap. If this bit is
* not set, the target pixmap's buffer _must_ be zeroed before
* rendering.
* _not_ set, the target pixmap's buffer _must_ be zeroed before
* rendering and the output will be clipped to its size.
*
* Direct rendering is only possible with anti-aliased glyphs.
*
* FT_RASTER_FLAG_CLIP ::
* This flag is only used in direct rendering mode. If set, the output
* will be clipped to a box specified in the `clip_box` field of the
* @FT_Raster_Params structure.
*
* Note that by default, the glyph bitmap is clipped to the target
* pixmap, except in direct rendering mode where all spans are
* generated if no clipping box is set.
* @FT_Raster_Params structure. Otherwise, the `clip_box` is
* effectively set to the bounding box and all spans are generated.
*/
#define FT_RASTER_FLAG_DEFAULT 0x0
#define FT_RASTER_FLAG_AA 0x1