Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType Demo Programs
Commits:
-
4ec7c98f
by Alexei Podtelezhnikov at 2023-01-20T15:49:56+00:00
2 changed files:
Changes:
| ... | ... | @@ -9,13 +9,16 @@ |
| 9 | 9 | /* */
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| 10 | 10 | /****************************************************************************/
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| 11 | 11 | |
| 12 | +/* The cached color gradients from the back- to foreground color are used
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| 13 | + * to quickly look up the blended color for a given pixel coverage (alpha).
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| 14 | + * They are calculated with gamma correction and stored with 8-bit depth
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| 15 | + * per channel, in the range [0-255]. Other supported color representations
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| 16 | + * require scaling to utilize the cache.
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| 17 | + */
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| 12 | 18 | |
| 13 | 19 | #include "grobjs.h"
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| 14 | 20 | #include "gblblit.h"
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| 15 | 21 | |
| 16 | -/* blitting gray glyphs
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| 17 | - */
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| 18 | - |
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| 19 | 22 | /* generic macros
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| 20 | 23 | */
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| 21 | 24 | #define GRGB_PACK(r,g,b) ( ((GBlenderPixel)(r) << 16) | \
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| ... | ... | @@ -206,7 +209,7 @@ |
| 206 | 209 | |
| 207 | 210 | #include "gblany.h"
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| 208 | 211 | |
| 209 | -/* Gray8 blitting routines
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| 212 | +/* Gray8 blitting routines, only 8-bit gray is supported
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| 210 | 213 | */
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| 211 | 214 | #define GDST_TYPE gray8
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| 212 | 215 | #define GDST_INCR 1
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| 1 | +/****************************************************************************/
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| 2 | +/* */
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| 3 | +/* The FreeType project -- a free and portable quality TrueType renderer. */
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| 4 | +/* */
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| 5 | +/* Copyright (C) 1996-2023 by */
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| 6 | +/* D. Turner, R.Wilhelm, and W. Lemberg */
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| 7 | +/* */
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| 8 | +/* gblender.c: Alpha blending with gamma correction and caching. */
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| 9 | +/* */
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| 10 | +/****************************************************************************/
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| 11 | + |
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| 12 | +/* The cached color gradients from the back- to foreground color are used
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| 13 | + * to quickly look up the blended color for a given pixel coverage (alpha).
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| 14 | + * They are calculated with gamma correction and stored with 8-bit depth
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| 15 | + * per channel, in the range [0-255]. Other supported color representations
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| 16 | + * require scaling to utilize the cache.
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| 17 | + */
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| 18 | + |
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| 1 | 19 | #include "gblender.h"
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| 2 | 20 | #include <stdlib.h>
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| 3 | 21 |