backport cont.

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

diff --git a/src/3dgfx/polyfill.h b/src/3dgfx/polyfill.h
new file mode 100644 (file)
index 0000000..19092f0
--- /dev/null
+++ b/src/3dgfx/polyfill.h
@@ -0,0 +1,79 @@
+#ifndef POLYFILL_H_
+#define POLYFILL_H_
+
+#include "inttypes.h"
+#include "3dgfx.h"
+
+#define POLYFILL_MODE_MASK     0x03
+#define POLYFILL_TEX_BIT       0x04
+#define POLYFILL_ALPHA_BIT     0x08
+#define POLYFILL_ADD_BIT       0x10
+
+enum {
+       POLYFILL_WIRE                   = 0,
+       POLYFILL_FLAT,
+       POLYFILL_GOURAUD,
+
+       POLYFILL_TEX_WIRE               = 4,
+       POLYFILL_TEX_FLAT,
+       POLYFILL_TEX_GOURAUD,
+
+       POLYFILL_ALPHA_WIRE             = 8,
+       POLYFILL_ALPHA_FLAT,
+       POLYFILL_ALPHA_GOURAUD,
+
+       POLYFILL_ALPHA_TEX_WIRE = 12,
+       POLYFILL_ALPHA_TEX_FLAT,
+       POLYFILL_ALPHA_TEX_GOURAUD,
+
+       POLYFILL_ADD_WIRE               = 16,
+       POLYFILL_ADD_FLAT,
+       POLYFILL_ADD_GOURAUD,
+
+       POLYFILL_ADD_TEX_WIRE   = 20,
+       POLYFILL_ADD_TEX_FLAT,
+       POLYFILL_ADD_TEX_GOURAUD
+};
+
+/* projected vertices for the rasterizer */
+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 */
+};
+
+struct pimage {
+       g3d_pixel *pixels;
+       int width, height;
+
+       int xshift, yshift;
+       unsigned int xmask, ymask;
+};
+
+extern struct pimage pfill_fb;
+extern struct pimage pfill_tex;
+
+void polyfill_fbheight(int height);
+
+void polyfill(int mode, struct pvertex *verts, int nverts);
+
+void polyfill_wire(struct pvertex *verts, int nverts);
+void polyfill_flat(struct pvertex *verts, int nverts);
+void polyfill_gouraud(struct pvertex *verts, int nverts);
+void polyfill_tex_wire(struct pvertex *verts, int nverts);
+void polyfill_tex_flat(struct pvertex *verts, int nverts);
+void polyfill_tex_gouraud(struct pvertex *verts, int nverts);
+void polyfill_alpha_wire(struct pvertex *verts, int nverts);
+void polyfill_alpha_flat(struct pvertex *verts, int nverts);
+void polyfill_alpha_gouraud(struct pvertex *verts, int nverts);
+void polyfill_alpha_tex_wire(struct pvertex *verts, int nverts);
+void polyfill_alpha_tex_flat(struct pvertex *verts, int nverts);
+void polyfill_alpha_tex_gouraud(struct pvertex *verts, int nverts);
+void polyfill_add_wire(struct pvertex *verts, int nverts);
+void polyfill_add_flat(struct pvertex *verts, int nverts);
+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);
+
+#endif /* POLYFILL_H_ */