slight optimizations to GL_ConvertColorsFloattoByte

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@1833 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/gl_backend.c b/gl_backend.c
index 5cdf1153f34fdf4062f0375acedfd0abecdd5ec0..42cbcf34005f977da8bd41bcb3c8fd9e72a4e409 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -581,25 +581,33 @@ void GL_UpdateFarclip(void)
 
 void GL_ConvertColorsFloatToByte(void)
 {
-       int i, k, *icolor;
+       int i, k, total, *icolor;
        float *fcolor;
        qbyte *bcolor;
 
+       total = currentvertex * 4;
+
        // shift float to have 8bit fraction at base of number
-       for (i = 0, fcolor = &buf_fcolor->c[0];i < currentvertex;i++)
+       fcolor = &buf_fcolor->c[0];
+       for (i = 0;i < total;)
        {
-               *fcolor++ += 32768.0f;
-               *fcolor++ += 32768.0f;
-               *fcolor++ += 32768.0f;
-               *fcolor++ += 32768.0f;
+               fcolor[i    ] += 32768.0f;
+               fcolor[i + 1] += 32768.0f;
+               fcolor[i + 2] += 32768.0f;
+               fcolor[i + 3] += 32768.0f;
+               i += 4;
        }
+
        // then read as integer and kill float bits...
-       for (i = 0, icolor = (int *)&buf_fcolor->c[0], bcolor = &buf_bcolor->c[0];i < currentvertex;i++)
-       {
-               k = (*icolor++) & 0x7FFFFF;*bcolor++ = k > 255 ? 255 : k;
-               k = (*icolor++) & 0x7FFFFF;*bcolor++ = k > 255 ? 255 : k;
-               k = (*icolor++) & 0x7FFFFF;*bcolor++ = k > 255 ? 255 : k;
-               k = (*icolor++) & 0x7FFFFF;*bcolor++ = k > 255 ? 255 : k;
+       icolor = (int *)&buf_fcolor->c[0];
+       bcolor = &buf_bcolor->c[0];
+       for (i = 0;i < total;)
+       {
+               k = icolor[i    ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i    ] = (qbyte) k;
+               k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
+               k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
+               k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
+               i += 4;
        }
 }