ref: restore missing PARM_TEX_MEMORY RenderAPI parameter

ref/gl/gl_context.c

@@ -212,6 +212,8 @@ static int GL_RefGetParm( int parm, int arg )
 	case PARM_TEX_FLAGS:
 		glt = R_GetTexture( arg );
 		return glt->flags;
+	case PARM_TEX_MEMORY:
+		return GL_TexMemory();
 	case PARM_ACTIVE_TMU:
 		return glState.activeTMU;
 	case PARM_LIGHTSTYLEVALUE:

ref/gl/gl_image.c

@@ -1943,6 +1943,23 @@ void GL_ProcessTexture( int texnum, float gamma, int topColor, int bottomColor )
 	gEngfuncs.FS_FreeImage( pic );
 }
 
+/*
+================
+GL_TexMemory
+
+return size of all uploaded textures
+================
+*/
+int GL_TexMemory( void )
+{
+	int	i, total = 0;
+
+	for( i = 0; i < gl_numTextures; i++ )
+		total += gl_textures[i].size;
+
+	return total;
+}
+
 /*
 ==============================================================================
 

ref/gl/gl_local.h

@@ -366,6 +366,7 @@ void R_InitDlightTexture( void );
 void R_TextureList_f( void );
 void R_InitImages( void );
 void R_ShutdownImages( void );
+int GL_TexMemory( void );
 
 //
 // gl_rlight.c

ref/soft/r_context.c

@@ -147,6 +147,8 @@ static int GL_RefGetParm( int parm, int arg )
 	case PARM_TEX_FLAGS:
 		glt = R_GetTexture( arg );
 		return glt->flags;
+	case PARM_TEX_MEMORY:
+		return R_TexMemory();
 	case PARM_ACTIVE_TMU:
 		return  0; //glState.activeTMU;
 	case PARM_LIGHTSTYLEVALUE:

ref/soft/r_image.c

@@ -1199,6 +1199,23 @@ void GAME_EXPORT GL_ProcessTexture( int texnum, float gamma, int topColor, int b
 	gEngfuncs.FS_FreeImage( pic );
 }
 
+/*
+================
+R_TexMemory
+
+return size of all uploaded textures
+================
+*/
+int R_TexMemory( void )
+{
+	int	i, total = 0;
+
+	for( i = 0; i < r_numImages; i++ )
+		total += r_images[i].size;
+
+	return total;
+}
+
 /*
 ==============================================================================
 

ref/soft/r_local.h

@@ -448,6 +448,8 @@ void R_InitDlightTexture( void );
 void R_TextureList_f( void );
 void R_InitImages( void );
 void R_ShutdownImages( void );
+int R_TexMemory( void );
+
 #if 1
 //
 // gl_rlight.c