diff options
author | 2012-03-05 15:07:25 +0000 | |
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committer | 2012-03-05 15:07:25 +0000 | |
commit | d0b6a2dd821e879fc85e1ee645bd3e2ab111b53f (patch) | |
tree | dd63568c99ffec36c7fce5c61f3087194a6742af | |
parent | c2099d2707abcc94e139627399aed4b8894b69bb (diff) |
When guessing at the dest, use linear space instead of color space.
http://codereview.appspot.com/5732044/
--this line, and those below, will be ignored--
M src/ports/SkFontHost_FreeType.cpp
git-svn-id: http://skia.googlecode.com/svn/trunk@3313 2bbb7eff-a529-9590-31e7-b0007b416f81
-rw-r--r-- | src/ports/SkFontHost_FreeType.cpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/ports/SkFontHost_FreeType.cpp b/src/ports/SkFontHost_FreeType.cpp index da1040daa3..8494d38550 100644 --- a/src/ports/SkFontHost_FreeType.cpp +++ b/src/ports/SkFontHost_FreeType.cpp @@ -1068,7 +1068,7 @@ static void build_power_table(uint8_t table[], float ee) { } } -static void build_gamma_table(uint8_t table[256], int src, int dst) { +static void build_gamma_table(uint8_t table[256], int src) { static bool gInit; static uint8_t powTable[256], invPowTable[256]; if (!gInit) { @@ -1079,7 +1079,9 @@ static void build_gamma_table(uint8_t table[256], int src, int dst) { } const int linSrc = powTable[src]; - const int linDst = powTable[dst]; + const int linDst = 255 - linSrc; + const int dst = invPowTable[linDst]; + // have our contrast value taper off to 0 as the src luminance becomes white const int contrast = SK_GAMMA_CONTRAST * (255 - linSrc) / 255; @@ -1105,10 +1107,10 @@ static const uint8_t* getGammaTable(U8CPU luminance) { static uint8_t gGammaTables[4][256]; static bool gInited; if (!gInited) { - build_gamma_table(gGammaTables[0], 0x00, 0xFF); - build_gamma_table(gGammaTables[1], 0x66, 0x99); - build_gamma_table(gGammaTables[2], 0x99, 0x66); - build_gamma_table(gGammaTables[3], 0xFF, 0x00); + build_gamma_table(gGammaTables[0], 0x00); + build_gamma_table(gGammaTables[1], 0x55); + build_gamma_table(gGammaTables[2], 0xAA); + build_gamma_table(gGammaTables[3], 0xFF); gInited = true; } |