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convert our GL_RGB lightmaps to GL_RGBA which gives considerable

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performance boost on some systems. add GL_BGRA as an option, thanks
to Kristian Duske. the format is hardcoded as GL_RGBA for now,
need a way to make it configurable later.

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@813 af15c1b1-3010-417e-b628-4374ebc0bcbd
This commit is contained in:
Ozkan Sezer 2013-02-20 06:01:10 +00:00
parent 00a3f7659b
commit 204c6290b2
1 changed files with 46 additions and 12 deletions
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58
Quake/r_brush.c
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@ -884,13 +884,17 @@ void GL_BuildLightmaps (void)
lightmap_textures[i] = NULL;
//johnfitz
gl_lightmap_format = GL_RGB; //johnfitz
gl_lightmap_format = GL_RGBA; //johnfitz
//johnfitz -- only support GL_RGB lightmaps
//kristian -- now with GL_BGRA support
switch (gl_lightmap_format)
{
case GL_RGB:
lightmap_bytes = 3;
case GL_RGBA:
lightmap_bytes = 4;
break;
case GL_BGRA:
lightmap_bytes = 4;
break;
default:
Sys_Error ("GL_BuildLightmaps: bad lightmap format");
@ -1040,7 +1044,7 @@ Combine and scale multiple lightmaps into the 8.8 format in blocklights
void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
{
int smax, tmax;
int t;
int r,g,b;
int i, j, size;
byte *lightmap;
unsigned scale;
@ -1093,8 +1097,8 @@ void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
//johnfitz -- only support GL_RGB lightmaps
switch (gl_lightmap_format)
{
case GL_RGB:
stride -= smax * 3;
case GL_RGBA:
stride -= smax * 4;
bl = blocklights;
for (i=0 ; i<tmax ; i++, dest += stride)
{
@ -1102,16 +1106,46 @@ void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
{
if (gl_overbright.value)
{
t = *bl++ >> 8;if (t > 255) t = 255;*dest++ = t;
t = *bl++ >> 8;if (t > 255) t = 255;*dest++ = t;
t = *bl++ >> 8;if (t > 255) t = 255;*dest++ = t;
r = *bl++ >> 8;
g = *bl++ >> 8;
b = *bl++ >> 8;
}
else
{
t = *bl++ >> 7;if (t > 255) t = 255;*dest++ = t;
t = *bl++ >> 7;if (t > 255) t = 255;*dest++ = t;
t = *bl++ >> 7;if (t > 255) t = 255;*dest++ = t;
r = *bl++ >> 7;
g = *bl++ >> 7;
b = *bl++ >> 7;
}
if (r > 255) r = 255; *dest++ = r;
if (g > 255) g = 255; *dest++ = g;
if (b > 255) b = 255; *dest++ = b;
*dest++ = 255;
}
}
break;
case GL_BGRA:
stride -= smax * 4;
bl = blocklights;
for (i=0 ; i<tmax ; i++, dest += stride)
{
for (j=0 ; j<smax ; j++)
{
if (gl_overbright.value)
{
r = *bl++ >> 8;
g = *bl++ >> 8;
b = *bl++ >> 8;
}
else
{
r = *bl++ >> 7;
g = *bl++ >> 7;
b = *bl++ >> 7;
}
if (b > 255) b = 255; *dest++ = b;
if (g > 255) g = 255; *dest++ = g;
if (r > 255) r = 255; *dest++ = r;
*dest++ = 255;
}
}
break;