- minor cleanup and allow FHardwareTexture to restore the old bindings after creating a texture.

src/gl/textures/gl_hwtexture.cpp

@@ -99,10 +99,14 @@ unsigned int FHardwareTexture::CreateTexture(unsigned char * buffer, int w, int
 	TranslatedTexture * glTex=GetTexID(translation);
 	bool firstCall = glTex->glTexID == 0;
 	if (firstCall) glGenTextures(1,&glTex->glTexID);
-	if (texunit != 0) glActiveTexture(GL_TEXTURE0+texunit);
+
+	unsigned textureBinding = UINT_MAX;
+	if (texunit == -1)	glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding);
+	if (texunit > 0) glActiveTexture(GL_TEXTURE0+texunit);
+	if (texunit >= 0) lastbound[texunit] = glTex->glTexID;
 	glBindTexture(GL_TEXTURE_2D, glTex->glTexID);
+
 	FGLDebug::LabelObject(GL_TEXTURE, glTex->glTexID, name);
-	lastbound[texunit] = glTex->glTexID;
 
 	rw = GetTexDimension(w);
 	rh = GetTexDimension(h);
@@ -168,7 +172,8 @@ unsigned int FHardwareTexture::CreateTexture(unsigned char * buffer, int w, int
 		glTex->mipmapped = true;
 	}
 
-	if (texunit != 0) glActiveTexture(GL_TEXTURE0);
+	if (texunit > 0) glActiveTexture(GL_TEXTURE0);
+	else if (texunit == -1) glBindTexture(GL_TEXTURE_2D, textureBinding);
 	return glTex->glTexID;
 }
 

src/hwrenderer/textures/hw_material.cpp

@@ -140,7 +140,7 @@ IHardwareTexture * FMaterial::ValidateSysTexture(FTexture * tex, bool expand)
 		IHardwareTexture *gltex = tex->SystemTexture[expand];
 		if (gltex == nullptr) 
 		{
-			gltex = tex->SystemTexture[expand] = screen->CreateHardwareTexture(tex);
+			gltex = tex->SystemTexture[expand] = screen->CreateHardwareTexture();
 		}
 		return gltex;
 	}

src/textures/texture.cpp

@@ -774,7 +774,7 @@ FWrapperTexture::FWrapperTexture(int w, int h, int bits)
 	Format = bits;
 	UseType = ETextureType::SWCanvas;
 	bNoCompress = true;
-	SystemTexture[0] = screen->CreateHardwareTexture(this);
+	SystemTexture[0] = screen->CreateHardwareTexture();
 }
 
 //===========================================================================

src/textures/textures.h

@@ -42,6 +42,7 @@
 #include "colormatcher.h"
 #include "r_data/renderstyle.h"
 #include "r_data/r_translate.h"
+#include "hwrenderer/textures/hw_texmanager.h"
 #include <vector>
 
 // 15 because 0th texture is our texture