fixed cloud layers in quake sky loading

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@3750 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/r_sky.c b/r_sky.c
index 7af15bacf76d4efa39f3a06aaa15f485f66ac89a..b8ed536edf9bc1de2104ceb4ddb90a8e2b483ed8 100644 (file)
--- a/r_sky.c
+++ b/r_sky.c
@@ -332,8 +332,6 @@ static void R_SkySphere(void)
        if (r_textureunits.integer >= 2)
        {
                // one pass using GL_DECAL or GL_INTERPOLATE_ARB for alpha layer
-               // LordHavoc: note that color is not set here because it does not
-               // matter with GL_REPLACE
                m.tex[1] = R_GetTexture(alphaskytexture);
                m.texcombinergb[1] = gl_combine.integer ? GL_INTERPOLATE_ARB : GL_DECAL;
                m.pointer_texcoord[1] = skysphere_texcoord2f;
@@ -397,15 +395,8 @@ A sky texture is 256*128, with the right side being a masked overlay
 */
 void R_InitSky (qbyte *src, int bytesperpixel)
 {
-       int i, j, p, r, g, b;
-       qbyte skyupperlayerpixels[128*128*4], skylowerlayerpixels[128*128*4];
-       unsigned trans[128*128], transpix, *rgba;
-       union
-       {
-               int i;
-               qbyte b[4];
-       }
-       transpixunion;
+       int i, j;
+       unsigned solidpixels[128*128], alphapixels[128*128];
 
        skyavailable_quake = true;
 
@@ -417,65 +408,53 @@ void R_InitSky (qbyte *src, int bytesperpixel)
 
        if (bytesperpixel == 4)
        {
-               transpixunion.i = 0;
                for (i = 0;i < 128;i++)
+               {
                        for (j = 0;j < 128;j++)
-                               trans[(i*128) + j] = ((unsigned *)src)[i*256+j+128];
+                       {
+                               solidpixels[(i*128) + j] = ((unsigned *)src)[i*256+j+128];
+                               alphapixels[(i*128) + j] = ((unsigned *)src)[i*256+j];
+                       }
+               }
        }
        else
        {
                // make an average value for the back to avoid
                // a fringe on the top level
+               int p, r, g, b;
+               union
+               {
+                       unsigned int i;
+                       unsigned char b[4];
+               }
+               rgba;
                r = g = b = 0;
-               for (i=0 ; i<128 ; i++)
+               for (i = 0;i < 128;i++)
                {
-                       for (j=0 ; j<128 ; j++)
+                       for (j = 0;j < 128;j++)
                        {
-                               p = src[i*256 + j + 128];
-                               rgba = &palette_complete[p];
-                               trans[(i*128) + j] = *rgba;
-                               r += ((qbyte *)rgba)[0];
-                               g += ((qbyte *)rgba)[1];
-                               b += ((qbyte *)rgba)[2];
+                               rgba.i = palette_complete[src[i*256 + j + 128]];
+                               r += rgba.b[0];
+                               g += rgba.b[1];
+                               b += rgba.b[2];
                        }
                }
-
-               transpixunion.i = 0;
-               transpixunion.b[0] = r/(128*128);
-               transpixunion.b[1] = g/(128*128);
-               transpixunion.b[2] = b/(128*128);
-               transpixunion.b[3] = 0;
-       }
-       transpix = transpixunion.i;
-
-       memcpy(skyupperlayerpixels, trans, 128*128*4);
-
-       solidskytexture = R_LoadTexture2D(skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
-
-       if (bytesperpixel == 4)
-       {
+               rgba.b[0] = r/(128*128);
+               rgba.b[1] = g/(128*128);
+               rgba.b[2] = b/(128*128);
+               rgba.b[3] = 0;
                for (i = 0;i < 128;i++)
-                       for (j = 0;j < 128;j++)
-                               trans[(i*128) + j] = ((unsigned *)src)[i*256+j];
-       }
-       else
-       {
-               for (i=0 ; i<128 ; i++)
                {
-                       for (j=0 ; j<128 ; j++)
+                       for (j = 0;j < 128;j++)
                        {
-                               p = src[i*256 + j];
-                               if (p == 0)
-                                       trans[(i*128) + j] = transpix;
-                               else
-                                       trans[(i*128) + j] = palette_complete[p];
+                               solidpixels[(i*128) + j] = palette_complete[src[i*256 + j + 128]];
+                               alphapixels[(i*128) + j] = (p = src[i*256 + j]) ? palette_complete[p] : rgba.i;
                        }
                }
        }
 
-       memcpy(skylowerlayerpixels, trans, 128*128*4);
-
-       alphaskytexture = R_LoadTexture2D(skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE, NULL);
+       solidskytexture = R_LoadTexture2D(skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) solidpixels, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
+       alphaskytexture = R_LoadTexture2D(skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) alphapixels, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE, NULL);
 }
 
 void R_ResetQuakeSky(void)