diff options
Diffstat (limited to 'src/smooth/ftgrays.c')
| -rw-r--r-- | src/smooth/ftgrays.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c index 155c35273..d93533824 100644 --- a/src/smooth/ftgrays.c +++ b/src/smooth/ftgrays.c @@ -86,7 +86,8 @@ /* experimental support for gamma correction within the rasterizer */ -#define xxxGRAYS_USE_GAMMA +#define xxxGRAYS_USE_GAMMA + /*************************************************************************/ /* */ @@ -144,8 +145,8 @@ #endif /* _STANDALONE_ */ -#ifndef MEM_Set -# define MEM_Set(d,s,c) memset(d,s,c) +#ifndef MEM_Set +#define MEM_Set( d, s, c ) memset( d, s, c ) #endif /* define this to dump debugging information */ @@ -309,8 +310,8 @@ void* memory; jmp_buf jump_buffer; -#ifdef GRAYS_USE_GAMMA - FT_Byte gamma[257]; +#ifdef GRAYS_USE_GAMMA + FT_Byte gamma[257]; #endif } TRaster, *PRaster; @@ -1240,6 +1241,7 @@ { FT_UInt coverage = spans->coverage; + #ifdef GRAYS_USE_GAMMA coverage = raster->gamma[(FT_Byte)coverage]; #endif @@ -1974,26 +1976,28 @@ /**** RASTER OBJECT CREATION: In standalone mode, we simply use *****/ /**** a static object. *****/ -#ifdef GRAYS_USE_GAMMA +#ifdef GRAYS_USE_GAMMA /* initialize the "gamma" table. Yes, this is really a crummy function */ - /* but the results look pretty good for something that simple.. */ + /* but the results look pretty good for something that simple. */ /* */ -#define M_MAX 255 -#define M_X 128 -#define M_Y 96 +#define M_MAX 255 +#define M_X 128 +#define M_Y 192 static void grays_init_gamma( PRaster raster ) { FT_UInt x, a; + for ( x = 0; x < 256; x++ ) { if ( x <= M_X ) - a = (x * M_Y + (M_X/2)) / M_X; + a = ( x * M_Y + M_X / 2) / M_X; else - a = M_Y + ((x-M_X)*(M_MAX-M_Y) + (M_MAX-M_X)/2)/(M_MAX-M_X); + a = M_Y + ( ( x - M_X ) * ( M_MAX - M_Y ) + + ( M_MAX - M_X ) / 2 ) / ( M_MAX - M_X ); raster->gamma[x] = (FT_Byte)a; } |