From f8363704e91dfe99ee1596e926183a86184c57cf Mon Sep 17 00:00:00 2001
From: divverent <divverent@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Sat, 3 Sep 2011 15:06:21 +0000
Subject: [PATCH] disable offsetmapping where TEXF_ALPHA is not set and no
 height bias exists

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11322 d7cf8633-e32d-0410-b094-e92efae38249
---
 gl_rmain.c    | 14 +++++++-------
 gl_textures.c |  5 +++++
 r_textures.h  |  3 +++
 3 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/gl_rmain.c b/gl_rmain.c
index 24ea8ffa..7e1609fe 100644
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -375,7 +375,7 @@ static void R_BuildBlankTextures(void)
 	data[2] = 128; // normal X
 	data[1] = 128; // normal Y
 	data[0] = 255; // normal Z
-	data[3] = 128; // height
+	data[3] = 255; // height
 	r_texture_blanknormalmap = R_LoadTexture2D(r_main_texturepool, "blankbump", 1, 1, data, TEXTYPE_BGRA, TEXF_PERSISTENT, -1, NULL);
 	data[0] = 255;
 	data[1] = 255;
@@ -2184,7 +2184,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	}
 	else if (rsurfacepass == RSURFPASS_DEFERREDGEOMETRY)
 	{
-		if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
+		if (r_glsl_offsetmapping.integer && ((R_TextureFlags(rsurface.texture->nmaptexture) & TEXF_ALPHA) || rsurface.texture->offsetbias != 0.0f))
 		{
 			switch(rsurface.texture->offsetmapping)
 			{
@@ -2205,7 +2205,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	}
 	else if (rsurfacepass == RSURFPASS_RTLIGHT)
 	{
-		if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
+		if (r_glsl_offsetmapping.integer && ((R_TextureFlags(rsurface.texture->nmaptexture) & TEXF_ALPHA) || rsurface.texture->offsetbias != 0.0f))
 		{
 			switch(rsurface.texture->offsetmapping)
 			{
@@ -2251,7 +2251,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	}
 	else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_FULLBRIGHT)
 	{
-		if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
+		if (r_glsl_offsetmapping.integer && ((R_TextureFlags(rsurface.texture->nmaptexture) & TEXF_ALPHA) || rsurface.texture->offsetbias != 0.0f))
 		{
 			switch(rsurface.texture->offsetmapping)
 			{
@@ -2304,7 +2304,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	}
 	else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_MODELLIGHT_DIRECTIONAL)
 	{
-		if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
+		if (r_glsl_offsetmapping.integer && ((R_TextureFlags(rsurface.texture->nmaptexture) & TEXF_ALPHA) || rsurface.texture->offsetbias != 0.0f))
 		{
 			switch(rsurface.texture->offsetmapping)
 			{
@@ -2367,7 +2367,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	}
 	else if (rsurface.texture->currentmaterialflags & MATERIALFLAG_MODELLIGHT)
 	{
-		if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
+		if (r_glsl_offsetmapping.integer && ((R_TextureFlags(rsurface.texture->nmaptexture) & TEXF_ALPHA) || rsurface.texture->offsetbias != 0.0f))
 		{
 			switch(rsurface.texture->offsetmapping)
 			{
@@ -2427,7 +2427,7 @@ void R_SetupShader_Surface(const vec3_t lightcolorbase, qboolean modellighting,
 	}
 	else
 	{
-		if (r_glsl_offsetmapping.integer && (rsurface.texture->nmaptexture != r_texture_blanknormalmap || rsurface.texture->offsetbias != 0.0f))
+		if (r_glsl_offsetmapping.integer && ((R_TextureFlags(rsurface.texture->nmaptexture) & TEXF_ALPHA) || rsurface.texture->offsetbias != 0.0f))
 		{
 			switch(rsurface.texture->offsetmapping)
 			{
diff --git a/gl_textures.c b/gl_textures.c
index 06038a3e..180447ff 100644
--- a/gl_textures.c
+++ b/gl_textures.c
@@ -2584,6 +2584,11 @@ int R_TextureHeight(rtexture_t *rt)
 	return rt ? ((gltexture_t *)rt)->inputheight : 0;
 }
 
+int R_TextureFlags(rtexture_t *rt)
+{
+	return rt ? ((gltexture_t *)rt)->flags : 0;
+}
+
 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int z, int width, int height, int depth)
 {
 	gltexture_t *glt = (gltexture_t *)rt;
diff --git a/r_textures.h b/r_textures.h
index 03e06908..82e3189c 100644
--- a/r_textures.h
+++ b/r_textures.h
@@ -179,6 +179,9 @@ int R_TextureWidth(rtexture_t *rt);
 // returns height of texture, as was specified when it was uploaded
 int R_TextureHeight(rtexture_t *rt);
 
+// returns flags of texture, as was specified when it was uploaded
+int R_TextureFlags(rtexture_t *rt);
+
 // only frees the texture if TEXF_PERSISTENT is not set
 // also resets the variable
 void R_PurgeTexture(rtexture_t *prt);
-- 
2.39.2