zbuffer partial implementation

[dosdemo] / src / 3dgfx / polyfill.h

diff --git a/src/3dgfx/polyfill.h b/src/3dgfx/polyfill.h
index 19092f0..fed8eda 100644 (file)
--- a/src/3dgfx/polyfill.h
+++ b/src/3dgfx/polyfill.h
@@ -8,6 +8,7 @@
 #define POLYFILL_TEX_BIT       0x04
 #define POLYFILL_ALPHA_BIT     0x08
 #define POLYFILL_ADD_BIT       0x10
+#define POLYFILL_ZBUF_BIT      0x20
 
 enum {
        POLYFILL_WIRE                   = 0,
@@ -32,7 +33,32 @@ enum {
 
        POLYFILL_ADD_TEX_WIRE   = 20,
        POLYFILL_ADD_TEX_FLAT,
-       POLYFILL_ADD_TEX_GOURAUD
+       POLYFILL_ADD_TEX_GOURAUD,
+
+
+       POLYFILL_WIRE_ZBUF                      = 32,
+       POLYFILL_FLAT_ZBUF,
+       POLYFILL_GOURAUD_ZBUF,
+
+       POLYFILL_TEX_WIRE_ZBUF          = 36,
+       POLYFILL_TEX_FLAT_ZBUF,
+       POLYFILL_TEX_GOURAUD_ZBUF,
+
+       POLYFILL_ALPHA_WIRE_ZBUF        = 40,
+       POLYFILL_ALPHA_FLAT_ZBUF,
+       POLYFILL_ALPHA_GOURAUD_ZBUF,
+
+       POLYFILL_ALPHA_TEX_WIRE_ZBUF = 44,
+       POLYFILL_ALPHA_TEX_FLAT_ZBUF,
+       POLYFILL_ALPHA_TEX_GOURAUD_ZBUF,
+
+       POLYFILL_ADD_WIRE_ZBUF          = 48,
+       POLYFILL_ADD_FLAT_ZBUF,
+       POLYFILL_ADD_GOURAUD_ZBUF,
+
+       POLYFILL_ADD_TEX_WIRE_ZBUF      = 52,
+       POLYFILL_ADD_TEX_FLAT_ZBUF,
+       POLYFILL_ADD_TEX_GOURAUD_ZBUF
 };
 
 /* projected vertices for the rasterizer */
@@ -40,6 +66,7 @@ struct pvertex {
        int32_t x, y; /* 24.8 fixed point */
        int32_t u, v; /* 16.16 fixed point */
        int32_t r, g, b, a;  /* int 0-255 */
+       uint16_t z;     /* 0-65535 */
 };
 
 struct pimage {
@@ -52,6 +79,7 @@ struct pimage {
 
 extern struct pimage pfill_fb;
 extern struct pimage pfill_tex;
+extern uint16_t *pfill_zbuf;
 
 void polyfill_fbheight(int height);
 
@@ -75,5 +103,17 @@ void polyfill_add_gouraud(struct pvertex *verts, int nverts);
 void polyfill_add_tex_wire(struct pvertex *verts, int nverts);
 void polyfill_add_tex_flat(struct pvertex *verts, int nverts);
 void polyfill_add_tex_gouraud(struct pvertex *verts, int nverts);
+void polyfill_flat_zbuf(struct pvertex *verts, int nverts);
+void polyfill_gouraud_zbuf(struct pvertex *verts, int nverts);
+void polyfill_tex_flat_zbuf(struct pvertex *verts, int nverts);
+void polyfill_tex_gouraud_zbuf(struct pvertex *verts, int nverts);
+void polyfill_alpha_flat_zbuf(struct pvertex *verts, int nverts);
+void polyfill_alpha_gouraud_zbuf(struct pvertex *verts, int nverts);
+void polyfill_alpha_tex_flat_zbuf(struct pvertex *verts, int nverts);
+void polyfill_alpha_tex_gouraud_zbuf(struct pvertex *verts, int nverts);
+void polyfill_add_flat_zbuf(struct pvertex *verts, int nverts);
+void polyfill_add_gouraud_zbuf(struct pvertex *verts, int nverts);
+void polyfill_add_tex_flat_zbuf(struct pvertex *verts, int nverts);
+void polyfill_add_tex_gouraud_zbuf(struct pvertex *verts, int nverts);
 
 #endif /* POLYFILL_H_ */