- fixed weapon positioning again, after finding out that the first fix just worked around the actual problem: The entire coordinate calculation must be done in floating point with no integer math at all. Due to roundoff errors the stored int values needed for wall and flat placement significantly lack precision and with the high scaling factor that needs to be used for weapon HUD sprites these can easily become several pixels. After fixing this the border around sprite textures could be reverted to one pixel again.

- fixed: The 'may not be expanded' state should be stored in the texture and reused later. This also needs to revalidate the material if it decides that expansion should be disallowed.

src/gl/scene/gl_weapon.cpp

@@ -75,13 +75,13 @@ void FGLRenderer::DrawPSprite (player_t * player,pspdef_t *psp,fixed_t sx, fixed
 {
 	float			fU1,fV1;
 	float			fU2,fV2;
-	fixed_t			tx;
+	float			tx;
-	int				x1,y1,x2,y2;
+	float			x1,y1,x2,y2;
 	float			scale;
-	fixed_t			scalex;
+	float			scalex;
 	float			ftexturemid;
 	                      // 4:3  16:9   16:10  17:10    5:4
-	static fixed_t xratio[] = {FRACUNIT, FRACUNIT*3/4, FRACUNIT*5/6, FRACUNIT*40/51, FRACUNIT};
+	static float xratio[] = {1.f, 3.f/4, 5.f/6, 40.f/51, 1.f};
 	
 	// [BB] In the HUD model step we just render the model and break out. 
 	if ( hudModelStep )
@@ -100,30 +100,34 @@ void FGLRenderer::DrawPSprite (player_t * player,pspdef_t *psp,fixed_t sx, fixed
 
 	gl_RenderState.SetMaterial(tex, CLAMP_XY_NOMIP, 0, OverrideShader, alphatexture);
 
-	int vw = viewwidth;
+	float vw = (float)viewwidth;
-	int vh = viewheight;
+	float vh = (float)viewheight;
+
+	FloatRect r;
+	tex->GetSpriteRect(&r);
 
 	// calculate edges of the shape
 	scalex = xratio[WidescreenRatio] * vw / 320;
 
-	tx = sx - ((160 + tex->GetScaledLeftOffset())<<FRACBITS);
+	tx = FIXED2FLOAT(sx) - (160 - r.left);
-	x1 = (FixedMul(tx, scalex)>>FRACBITS) + (vw>>1);
+	x1 = tx * scalex + vw/2;
 	if (x1 > vw)	return; // off the right side
-	x1+=viewwindowx;
+	x1 += viewwindowx;
 
-	tx +=  tex->TextureWidth() << FRACBITS;
+	tx += r.width;
-	x2 = (FixedMul(tx, scalex)>>FRACBITS) + (vw>>1);
+	x2 = tx * scalex + vw / 2;
 	if (x2 < 0) return; // off the left side
-	x2+=viewwindowx;
+	x2 += viewwindowx;
+
 
 	// killough 12/98: fix psprite positioning problem
-	ftexturemid = 100.f - FIXED2FLOAT(sy) + tex->GetScaledTopOffsetFloat();
+	ftexturemid = 100.f - FIXED2FLOAT(sy) - r.top;
 
 	AWeapon * wi=player->ReadyWeapon;
 	if (wi && wi->YAdjust)
 	{
 		float fYAd = FIXED2FLOAT(wi->YAdjust);
-		if (screenblocks>=11)
+		if (screenblocks >= 11)
 		{
 			ftexturemid -= fYAd;
 		}
@@ -133,23 +137,23 @@ void FGLRenderer::DrawPSprite (player_t * player,pspdef_t *psp,fixed_t sx, fixed
 		}
 	}
 
-	scale =  (SCREENHEIGHT*vw)/ (SCREENWIDTH * 200.0f);    
+	scale = (SCREENHEIGHT*vw) / (SCREENWIDTH * 200.0f);
-	y1 = viewwindowy + (vh >> 1) - (int)(ftexturemid * scale);
+	y1 = viewwindowy + vh / 2 - (ftexturemid * scale);
-	y2 = y1 + (int)((float)tex->TextureHeight() * scale) + 1;
+	y2 = y1 + (r.height * scale) + 1;
 
 	if (!mirror)
 	{
-		fU1=tex->GetUL();
+		fU1=tex->GetSpriteUL();
-		fV1=tex->GetVT();
+		fV1=tex->GetSpriteVT();
-		fU2=tex->GetUR();
+		fU2=tex->GetSpriteUR();
-		fV2=tex->GetVB();
+		fV2=tex->GetSpriteVB();
 	}
 	else
 	{
-		fU2=tex->GetUL();
+		fU2=tex->GetSpriteUL();
-		fV1=tex->GetVT();
+		fV1=tex->GetSpriteVT();
-		fU1=tex->GetUR();
+		fU1=tex->GetSpriteUR();
-		fV2=tex->GetVB();
+		fV2=tex->GetSpriteVB();
 	}
 
 	if (tex->GetTransparent() || OverrideShader != -1)

src/gl/textures/gl_material.cpp

@@ -89,7 +89,6 @@ FGLTexture::FGLTexture(FTexture * tx, bool expandpatches)
 	bHasColorkey = false;
 	bIsTransparent = -1;
 	bExpandFlag = expandpatches;
-	mExpandX = mExpandY = 0;
 	tex->gl_info.SystemTexture[expandpatches] = this;
 }
 
@@ -199,20 +198,10 @@ unsigned char * FGLTexture::CreateTexBuffer(int translation, int & w, int & h, F
 		}
 	}
 
-	int exx, exy;
+	int exx = bExpandFlag && createexpanded;
-	if (createexpanded)
-	{
-		exx = mExpandX;
-		exy = mExpandY;
-	}
-	else
-	{
-		exx = exy = 0;
-	}
-
 
 	W = w = tex->GetWidth() + 2 * exx;
-	H = h = tex->GetHeight() + 2 * exy;
+	H = h = tex->GetHeight() + 2 * exx;
 
 
 	buffer=new unsigned char[W*(H+1)*4];
@@ -230,7 +219,7 @@ unsigned char * FGLTexture::CreateTexBuffer(int translation, int & w, int & h, F
 		if (imgCreate.Create(W, H))
 		{
 			memset(imgCreate.GetPixels(), 0, W * H * 4);
-			int trans = tex->CopyTrueColorPixels(&imgCreate, exx, exy);
+			int trans = tex->CopyTrueColorPixels(&imgCreate, exx, exx);
 			bmp.CopyPixelDataRGB(0, 0, imgCreate.GetPixels(), W, H, 4, W * 4, 0, CF_BGRA);
 			tex->CheckTrans(buffer, W*H, trans);
 			bIsTransparent = tex->gl_info.mIsTransparent;
@@ -238,7 +227,7 @@ unsigned char * FGLTexture::CreateTexBuffer(int translation, int & w, int & h, F
 	}
 	else if (translation<=0)
 	{
-		int trans = tex->CopyTrueColorPixels(&bmp, exx, exy);
+		int trans = tex->CopyTrueColorPixels(&bmp, exx, exx);
 		tex->CheckTrans(buffer, W*H, trans);
 		bIsTransparent = tex->gl_info.mIsTransparent;
 	}
@@ -247,7 +236,7 @@ unsigned char * FGLTexture::CreateTexBuffer(int translation, int & w, int & h, F
 		// When using translations everything must be mapped to the base palette.
 		// Since FTexture's method is doing exactly that by calling GetPixels let's use that here
 		// to do all the dirty work for us. ;)
-		tex->FTexture::CopyTrueColorPixels(&bmp, exx, exy);
+		tex->FTexture::CopyTrueColorPixels(&bmp, exx, exx);
 		bIsTransparent = 0;
 	}
 
@@ -271,7 +260,7 @@ FHardwareTexture *FGLTexture::CreateHwTexture()
 	if (tex->UseType==FTexture::TEX_Null) return NULL;		// Cannot register a NULL texture
 	if (mHwTexture == NULL)
 	{
-		mHwTexture = new FHardwareTexture(tex->GetWidth() + mExpandX*2, tex->GetHeight() + mExpandY*2, tex->gl_info.bNoCompress);
+		mHwTexture = new FHardwareTexture(tex->GetWidth() + bExpandFlag*2, tex->GetHeight() + bExpandFlag*2, tex->gl_info.bNoCompress);
 	}
 	return mHwTexture; 
 }
@@ -454,7 +443,7 @@ FMaterial::FMaterial(FTexture * tx, bool expanded)
 			}
 		}
 	}
-	mBaseLayer = ValidateSysTexture(tx, true);
+	mBaseLayer = ValidateSysTexture(tx, expanded);
 
 
 	mWidth = tx->GetWidth();
@@ -467,7 +456,11 @@ FMaterial::FMaterial(FTexture * tx, bool expanded)
 	mSpriteU[1] = mSpriteV[1] = 1.f;
 
 	FTexture *basetex = tx->GetRedirect(false);
+	// allow the redirect only if the textute is not expanded or the scale matches.
+	if (!expanded || (tx->xScale == basetex->xScale && tx->yScale == basetex->yScale))
+	{
 		mBaseLayer = ValidateSysTexture(basetex, expanded);
+	}
 
 	float fxScale = FIXED2FLOAT(tx->xScale);
 	float fyScale = FIXED2FLOAT(tx->yScale);
@@ -481,20 +474,17 @@ FMaterial::FMaterial(FTexture * tx, bool expanded)
 	if (expanded)
 	{
 		// a little adjustment to make sprites look better with texture filtering:
-		// create a 1 pixel wide empty frame around them. The frame must be the same size as the texture scale so that
+		// create a 1 pixel wide empty frame around them.
-		// position calculations remain scale independent.
 		int trim[4];
 		bool trimmed = TrimBorders(trim);	// get the trim size before adding the empty frame
 
-		int intscaleX = MAX(1, tex->xScale >> FRACBITS);
-		int intscaleY = MAX(1, tex->yScale >> FRACBITS);
 		int oldwidth = mWidth;
 		int oldheight = mHeight;
 
-		mWidth+=2*intscaleX;
+		mWidth+=2;
-		mHeight+=2*intscaleY;
+		mHeight+=2;
-		mLeftOffset+=intscaleX;
+		mLeftOffset+=1;
-		mTopOffset+=intscaleY;
+		mTopOffset+=1;
 		mRenderWidth = mRenderWidth * mWidth / oldwidth;
 		mRenderHeight = mRenderHeight * mHeight / oldheight;
 
@@ -793,14 +783,30 @@ void FMaterial::BindToFrameBuffer()
 
 FMaterial * FMaterial::ValidateTexture(FTexture * tex, bool expand)
 {
+again:
 	if (tex	&& tex->UseType!=FTexture::TEX_Null)
 	{
+		if (tex->gl_info.bNoExpand) expand = false;
+
 		FMaterial *gltex = tex->gl_info.Material[expand];
 		if (gltex == NULL) 
 		{
-			if (tex->bWarped || tex->bHasCanvas || tex->gl_info.shaderindex >= FIRST_USER_SHADER)// || tex->xScale != FRACUNIT && tex->yScale != FRACUNIT)
+			if (expand)
 			{
-				expand = false;
+				if (tex->bWarped || tex->bHasCanvas || tex->gl_info.shaderindex >= FIRST_USER_SHADER)
+				{
+					tex->gl_info.bNoExpand = true;
+					goto again;
+				}
+				if (tex->gl_info.Brightmap != NULL &&
+					(tex->GetWidth() != tex->gl_info.Brightmap->GetWidth() ||
+					tex->GetHeight() != tex->gl_info.Brightmap->GetHeight())
+					)
+				{
+					// do not expand if the brightmap's size differs.
+					tex->gl_info.bNoExpand = true;
+					goto again;
+				}
 			}
 			gltex = new FMaterial(tex, expand);
 		}

src/gl/textures/gl_material.h

@@ -66,8 +66,6 @@ private:
 
 	bool bHasColorkey;		// only for hires
 	bool bExpandFlag;
-	int mExpandX;
-	int mExpandY;
 
 	unsigned char * LoadHiresTexture(FTexture *hirescheck, int *width, int *height);
 
@@ -80,11 +78,6 @@ public:
 	~FGLTexture();
 
 	unsigned char * CreateTexBuffer(int translation, int & w, int & h, FTexture *hirescheck, bool createexpanded = true);
-	void SetExpand(int x, int y) 
-	{
-		mExpandX = x;
-		mExpandY = y;
-	}
 
 	void Clean(bool all);
 	int Dump(int i);

src/gl/textures/gl_texture.cpp

@@ -235,6 +235,7 @@ FTexture::MiscGLInfo::MiscGLInfo() throw()
 	bDisableFullbright = false;
 	bNoFilter = false;
 	bNoCompress = false;
+	bNoExpand = false;
 	areas = NULL;
 	areacount = 0;
 	mIsTransparent = -1;

src/textures/textures.h

@@ -352,6 +352,7 @@ public:
 		bool bDisableFullbright:1;				// This texture will not be displayed as fullbright sprite
 		bool bNoFilter:1;
 		bool bNoCompress:1;
+		bool bNoExpand:1;
 
 		MiscGLInfo() throw ();
 		~MiscGLInfo();