a rather hefty 6% speed gain by getting rid of the R_Mesh_UpdateFarClip function...

[xonotic/darkplaces.git] / gl_backend.h

diff --git a/gl_backend.h b/gl_backend.h
index 9d1309218d244467f557fc9a489b82058e98f3cd..e7183ad0c0e31754e36556f7f10cceecb3697d41 100644 (file)
--- a/gl_backend.h
+++ b/gl_backend.h
@@ -1,7 +1,10 @@
 
-#define MAX_TEXTUREUNITS 4
+#ifndef GL_BACKEND_H
+#define GL_BACKEND_H
 
-extern int c_meshtris;
+#define MAX_TEXTUREUNITS 8
+
+extern int c_meshtris, c_meshs, c_transtris, c_transmeshs;
 
 typedef struct
 {
@@ -17,26 +20,77 @@ typedef struct
        int vertexstep;
        float *color;
        int colorstep;
-       // if color is NULL, these are used for all vertices
-       float cr, cg, cb, ca;
+       float cr, cg, cb, ca; // if color is NULL, these are used for all vertices
        int tex[MAX_TEXTUREUNITS];
        float *texcoords[MAX_TEXTUREUNITS];
        int texcoordstep[MAX_TEXTUREUNITS];
-       float texrgbscale[MAX_TEXTUREUNITS]; // used only if COMBINE is present
+       int texrgbscale[MAX_TEXTUREUNITS]; // used only if COMBINE is present
 }
 rmeshinfo_t;
 
+typedef struct
+{
+       //input to R_Mesh_Draw_GetBuffer
+       int transparent;
+       int depthwrite; // force depth writing enabled even if polygon is not opaque
+       int depthdisable; // disable depth read/write entirely
+       int blendfunc1;
+       int blendfunc2;
+       int numtriangles;
+       int numverts;
+       int tex[MAX_TEXTUREUNITS];
+       int texrgbscale[MAX_TEXTUREUNITS]; // used only if COMBINE is present
+
+       // output
+       int *index;
+       float *vertex;
+       float *color;
+       float colorscale;
+       float *texcoords[MAX_TEXTUREUNITS];
+}
+rmeshbufferinfo_t;
+
 // adds console variables and registers the render module (only call from GL_Init)
 void gl_backend_init(void);
-// sets up mesh renderer for the frame
-void R_Mesh_Clear(void);
-// renders queued meshs
+
+// starts mesh rendering for the frame
+void R_Mesh_Start(float farclip);
+
+// ends mesh rendering for the frame
+// (only valid after R_Mesh_Start)
+void R_Mesh_Finish(void);
+
+// clears depth buffer, used for masked sky rendering
+// (only valid between R_Mesh_Start and R_Mesh_Finish)
+void R_Mesh_ClearDepth(void);
+
+// renders current batch of meshs
+// (only valid between R_Mesh_Start and R_Mesh_Finish)
 void R_Mesh_Render(void);
+
 // queues a mesh to be rendered (invokes Render if queue is full)
+// (only valid between R_Mesh_Start and R_Mesh_Finish)
 void R_Mesh_Draw(const rmeshinfo_t *m);
+
 // renders the queued transparent meshs
+// (only valid between R_Mesh_Start and R_Mesh_Finish)
 void R_Mesh_AddTransparent(void);
+
 // ease-of-use frontend to R_Mesh_Draw, set up meshinfo, except for index and numtriangles and numverts, then call this
+// (only valid between R_Mesh_Start and R_Mesh_Finish)
 void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts);
-// faster hardwired version of R_Mesh_Draw specifically for decals (has close ties to decal code)
-void R_Mesh_DrawDecal(const rmeshinfo_t *m);
+
+// allocates space in geometry buffers, and fills in pointers to the buffers in passsed struct
+// (this is used for very high speed rendering, no copying)
+// (only valid between R_Mesh_Start and R_Mesh_Finish)
+int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m);
+
+// saves a section of the rendered frame to a .tga file
+qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height);
+// used by R_Envmap_f and internally in backend, clears the frame
+void R_ClearScreen(void);
+// invoke refresh of frame
+void SCR_UpdateScreen (void);
+
+#endif
+