//===========================================================================
//
// Gets the average color of a texture for use as a sky cap color
//
//===========================================================================
static PalEntry SkyCapColor(FTextureID texno, bool bottom)
{
PalEntry col;
FTexture *tex = TexMan[texno];
if (!tex) return 0;
if (!tex->gl_info.bSkyColorDone)
{
tex->gl_info.bSkyColorDone = true;
FGLTexture * gltex = FGLTexture::ValidateTexture(tex);
if (tex)
{
int w;
int h;
unsigned char * buffer = gltex->CreateTexBuffer(FGLTexture::GLUSE_TEXTURE, CM_DEFAULT, 0, w, h);
if (buffer)
{
tex->gl_info.CeilingSkyColor = averageColor((DWORD *) buffer, w * MIN(30, h), 0);
if (h>30)
{
tex->gl_info.FloorSkyColor = averageColor(((DWORD *) buffer)+(h-30)*w, w * 30, 0);
}
else tex->gl_info.FloorSkyColor = tex->gl_info.CeilingSkyColor;
delete buffer;
}
}
}
return bottom? tex->gl_info.FloorSkyColor : tex->gl_info.CeilingSkyColor;
}
//===========================================================================
//
// Gets the average color of a texture for use as a sky cap color
//
//===========================================================================
static PalEntry SkyCapColor(unsigned int texno, bool bottom)
{
PalEntry col;
if (!SkyColors)
{
MaxSkyTexture=TexMan.NumTextures();
SkyColors=new PalEntry[MaxSkyTexture*2]; // once for top cap, once for bottom cap
memset(SkyColors, 0, sizeof(PalEntry)*MaxSkyTexture);
}
if (texno<MaxSkyTexture)
{
if (SkyColors[texno].a==0)
{
FGLTexture * tex = FGLTexture::ValidateTexture(texno);
if (tex)
{
int w;
int h;
unsigned char * buffer = tex->CreateTexBuffer(CM_DEFAULT, 0, NULL, w, h);
if (buffer)
{
SkyColors[texno]=averageColor((unsigned long *) buffer, w * MIN(30, h), false);
if (h>30)
{
SkyColors[texno+MaxSkyTexture]= averageColor(((unsigned long *) buffer)+(h-30)*w, w * 30, false);
}
else SkyColors[texno+MaxSkyTexture]=SkyColors[texno];
delete buffer;
SkyColors[texno].a=1; // mark as processed
}
}
}
return SkyColors[texno+MaxSkyTexture*bottom];
}
else
{
return 0;
}
}
