diff options
Diffstat (limited to 'common/util.cpp')
| -rw-r--r-- | common/util.cpp | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/common/util.cpp b/common/util.cpp index 86711866c9..cea9d3a8f0 100644 --- a/common/util.cpp +++ b/common/util.cpp @@ -21,9 +21,15 @@ #include "stdafx.h" #include "util.h" +// // 8-bit alpha blending routines -int BlendCache[256][256]; +// +static int BlendCache[256][256]; +// +// Find the entry in the given palette which matches the color defined by +// the tripel (r,b,g) most closely. +// int RGBMatch(byte *palette, int r, int g, int b) { int i, bestidx = 0, besterr = 0xFFFFFF; @@ -45,6 +51,9 @@ int RGBMatch(byte *palette, int r, int g, int b) return bestidx; } +// +// Blend two 8 bit colors into a third, all colors being defined by palette indices. +// int Blend(int src, int dst, byte *palette) { int r, g, b; @@ -70,6 +79,9 @@ int Blend(int src, int dst, byte *palette) return (BlendCache[dst][src] = RGBMatch(palette, r , g , b )); } +// +// Reset the blending cache +// void ClearBlendCache(byte *palette, int weight) { for (int i = 0; i < 256; i++) @@ -80,9 +92,9 @@ void ClearBlendCache(byte *palette, int weight) } -/* - * Print hexdump of the data passed in, 8 bytes a row - */ +// +// Print hexdump of the data passed in, 8 bytes a row +// void hexdump(const byte * data, int len) { int i; @@ -121,7 +133,12 @@ void hexdump(const byte * data, int len) printf("|\n"); } -// Resource string length, supports special chars starting with FF +// +// Given a pointer to a Scumm resource, this function returns the length +// of the (string) data in that resource. To do so it understands certain +// special chars starting with FF. The reason for this function is that +// sometimes resource data will contain 0 bytes, thus we can't just use strlen. +// int resStrLen(const char *src) { int num = 0; |