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* src/smooth/ftgrays.c: Comments expanded.

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This commit is contained in:
Alexei Podtelezhnikov 2026-05-08 21:21:45 -04:00
parent 7c08535abd
commit 8cbc8a7758
1 changed files with 12 additions and 6 deletions
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18
src/smooth/ftgrays.c
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@ -68,11 +68,14 @@
*
* This renderer has the following advantages:
*
* - It doesn't need an intermediate bitmap. Instead, one can supply a
* callback function that will be called by the renderer to draw gray
* spans on any target surface. You can thus do direct composition on
* any kind of bitmap, provided that you give the renderer the right
* callback.
* - It doesn't need an intermediate bitmap. Instead, linked lists
* of cells (pixels visited by an outline) are stored, which requires
* less memory and can be maintained on the stack for small glyphs.
*
* - One can supply a callback function that will be called by the
* renderer to draw gray spans on any target surface. You can thus
* do direct composition on any kind of bitmap, provided that you give
* the renderer the right callback.
*
* - A perfect anti-aliaser, i.e., it computes the _exact_ coverage on
* each pixel cell by straight segments.
@ -464,7 +467,10 @@ typedef ptrdiff_t FT_PtrDist;
} TPixmap;
/* maximum number of gray cells in the buffer */
/* Maximum number of gray cells in the stack buffer; */
/* for example, a buffer of 680 cells can accommodate */
/* a glyph with the taxicab perimeter of 680 pixels. */
/* A larger buffer can be allocated when necessary. */
#if FT_RENDER_POOL_SIZE > 2048
#define FT_MAX_GRAY_POOL ( FT_RENDER_POOL_SIZE / sizeof ( TCell ) )
#else