From ff1f093a0bab87bc08f4bc2a8fef6a5a8878f861 Mon Sep 17 00:00:00 2001
From: SmileTheory <SmileTheory@gmail.com>
Date: Fri, 1 Aug 2014 23:57:26 -0700
Subject: [PATCH] OpenGL2: Remove R_MipMap() and R_MipMap2(), and fix gamma
 conversion in R_MipMapsRGB()

---
 code/renderergl2/tr_image.c | 102 ++----------------------------------
 1 file changed, 3 insertions(+), 99 deletions(-)

diff --git a/code/renderergl2/tr_image.c b/code/renderergl2/tr_image.c
index eff21988..6c8dc456 100644
--- a/code/renderergl2/tr_image.c
+++ b/code/renderergl2/tr_image.c
@@ -1275,61 +1275,12 @@ void R_LightScaleTexture (byte *in, int inwidth, int inheight, qboolean only_gam
 
 /*
 ================
-R_MipMap2
+R_MipMapsRGB
 
 Operates in place, quartering the size of the texture
-Proper linear filter
+Colors are gamma correct 
 ================
 */
-static void R_MipMap2( byte *in, int inWidth, int inHeight ) {
-	int			i, j, k;
-	byte		*outpix;
-	int			inWidthMask, inHeightMask;
-	int			total;
-	int			outWidth, outHeight;
-	unsigned	*temp;
-
-	outWidth = inWidth >> 1;
-	outHeight = inHeight >> 1;
-	temp = ri.Hunk_AllocateTempMemory( outWidth * outHeight * 4 );
-
-	inWidthMask = inWidth - 1;
-	inHeightMask = inHeight - 1;
-
-	for ( i = 0 ; i < outHeight ; i++ ) {
-		for ( j = 0 ; j < outWidth ; j++ ) {
-			outpix = (byte *) ( temp + i * outWidth + j );
-			for ( k = 0 ; k < 4 ; k++ ) {
-				total = 
-					1 * (&in[ 4*(((i*2-1)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask)) ])[k] +
-					2 * (&in[ 4*(((i*2-1)&inHeightMask)*inWidth + ((j*2  )&inWidthMask)) ])[k] +
-					2 * (&in[ 4*(((i*2-1)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask)) ])[k] +
-					1 * (&in[ 4*(((i*2-1)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask)) ])[k] +
-
-					2 * (&in[ 4*(((i*2  )&inHeightMask)*inWidth + ((j*2-1)&inWidthMask)) ])[k] +
-					4 * (&in[ 4*(((i*2  )&inHeightMask)*inWidth + ((j*2  )&inWidthMask)) ])[k] +
-					4 * (&in[ 4*(((i*2  )&inHeightMask)*inWidth + ((j*2+1)&inWidthMask)) ])[k] +
-					2 * (&in[ 4*(((i*2  )&inHeightMask)*inWidth + ((j*2+2)&inWidthMask)) ])[k] +
-
-					2 * (&in[ 4*(((i*2+1)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask)) ])[k] +
-					4 * (&in[ 4*(((i*2+1)&inHeightMask)*inWidth + ((j*2  )&inWidthMask)) ])[k] +
-					4 * (&in[ 4*(((i*2+1)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask)) ])[k] +
-					2 * (&in[ 4*(((i*2+1)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask)) ])[k] +
-
-					1 * (&in[ 4*(((i*2+2)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask)) ])[k] +
-					2 * (&in[ 4*(((i*2+2)&inHeightMask)*inWidth + ((j*2  )&inWidthMask)) ])[k] +
-					2 * (&in[ 4*(((i*2+2)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask)) ])[k] +
-					1 * (&in[ 4*(((i*2+2)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask)) ])[k];
-				outpix[k] = total / 36;
-			}
-		}
-	}
-
-	Com_Memcpy( in, temp, outWidth * outHeight * 4 );
-	ri.Hunk_FreeTempMemory( temp );
-}
-
-
 static void R_MipMapsRGB( byte *in, int inWidth, int inHeight)
 {
 	int x, y, c, stride;
@@ -1341,7 +1292,7 @@ static void R_MipMapsRGB( byte *in, int inWidth, int inHeight)
 
 	if (!downmipSrgbLookupSet) {
 		for (x = 0; x < 256; x++)
-			downmipSrgbLookup[x] = ((x < 10) ? x / 3294.6f : powf((x / 255.0f + 0.055f) / 1.055f, 2.4f)) * 0.25f;
+			downmipSrgbLookup[x] = powf(x / 255.0f, 2.2f) * 0.25f;
 		downmipSrgbLookupSet = 1;
 	}
 
@@ -1379,53 +1330,6 @@ static void R_MipMapsRGB( byte *in, int inWidth, int inHeight)
 	}
 }
 
-/*
-================
-R_MipMap
-
-Operates in place, quartering the size of the texture
-================
-*/
-static void R_MipMap (byte *in, int width, int height) {
-	int		i, j;
-	byte	*out;
-	int		row;
-
-	if ( !r_simpleMipMaps->integer ) {
-		R_MipMap2( in, width, height );
-		return;
-	}
-
-	if ( width == 1 && height == 1 ) {
-		return;
-	}
-
-	row = width * 4;
-	out = in;
-	width >>= 1;
-	height >>= 1;
-
-	if ( width == 0 || height == 0 ) {
-		width += height;	// get largest
-		for (i=0 ; i<width ; i++, out+=4, in+=8 ) {
-			out[0] = ( in[0] + in[4] )>>1;
-			out[1] = ( in[1] + in[5] )>>1;
-			out[2] = ( in[2] + in[6] )>>1;
-			out[3] = ( in[3] + in[7] )>>1;
-		}
-		return;
-	}
-
-	for (i=0 ; i<height ; i++, in+=row) {
-		for (j=0 ; j<width ; j++, out+=4, in+=8) {
-			out[0] = (in[0] + in[4] + in[row+0] + in[row+4])>>2;
-			out[1] = (in[1] + in[5] + in[row+1] + in[row+5])>>2;
-			out[2] = (in[2] + in[6] + in[row+2] + in[row+6])>>2;
-			out[3] = (in[3] + in[7] + in[row+3] + in[row+7])>>2;
-		}
-	}
-}
-
 
 static void R_MipMapLuminanceAlpha (const byte *in, byte *out, int width, int height)
 {