added rampsize parameter to BuildGammaTable8 and 16

[xonotic/darkplaces.git] / palette.c

diff --git a/palette.c b/palette.c
index 8996f0111f70ac3ba2d1f29446db56b16e3a847e..21974d4de9e8c1b1dd905bb7d141df157ae461d7 100644 (file)
--- a/palette.c
+++ b/palette.c
@@ -109,28 +109,28 @@ void Palette_SetupSpecialPalettes(void)
        palette_font[0] = 0;
 }
 
-void BuildGammaTable8(float prescale, float gamma, float scale, float base, unsigned char *out)
+void BuildGammaTable8(float prescale, float gamma, float scale, float base, unsigned char *out, int rampsize)
 {
        int i, adjusted;
        double invgamma;
 
        invgamma = 1.0 / gamma;
-       prescale /= 255.0f;
-       for (i = 0;i < 256;i++)
+       prescale /= (double) (rampsize - 1);
+       for (i = 0;i < rampsize;i++)
        {
                adjusted = (int) (255.0 * (pow((double) i * prescale, invgamma) * scale + base) + 0.5);
                out[i] = bound(0, adjusted, 255);
        }
 }
 
-void BuildGammaTable16(float prescale, float gamma, float scale, float base, unsigned short *out)
+void BuildGammaTable16(float prescale, float gamma, float scale, float base, unsigned short *out, int rampsize)
 {
        int i, adjusted;
        double invgamma;
 
        invgamma = 1.0 / gamma;
-       prescale /= 255.0f;
-       for (i = 0;i < 256;i++)
+       prescale /= (double) (rampsize - 1);
+       for (i = 0;i < rampsize;i++)
        {
                adjusted = (int) (65535.0 * (pow((double) i * prescale, invgamma) * scale + base) + 0.5);
                out[i] = bound(0, adjusted, 65535);
@@ -164,7 +164,7 @@ void Palette_Init(void)
        scale = bound(0.01, scale, 10.0);
        base = bound(0, base, 0.95);
 
-       BuildGammaTable8(1.0f, gamma, scale, base, texturegammaramp);
+       BuildGammaTable8(1.0f, gamma, scale, base, texturegammaramp, 256);
 
        palfile = (unsigned char *)FS_LoadFile ("gfx/palette.lmp", tempmempool, false, &filesize);
        if (palfile && filesize >= 768)