#include <stdlib.h>
#include <string.h>
#include <assert.h>
-#if defined(__WATCOMC__) || defined(_MSC_VER)
+#if defined(__WATCOMC__) || defined(_MSC_VER) || defined(__DJGPP__)
#include <malloc.h>
#else
#include <alloca.h>
#endif
#include "polyfill.h"
#include "gfxutil.h"
-#include "demo.h"
+#define FILL_POLY_BITS 0x03
+
+/* mode bits: 00-wire 01-flat 10-gouraud 11-reserved
+ * bit 2: texture
+ * bit 3: blend
+ */
void (*fillfunc[])(struct pvertex*, int) = {
polyfill_wire,
polyfill_flat,
polyfill_gouraud,
- polyfill_tex,
- polyfill_tex_gouraud
+ 0,
+ polyfill_tex_wire,
+ polyfill_tex_flat,
+ polyfill_tex_gouraud,
+ 0,
+ polyfill_blend_wire,
+ polyfill_blend_flat,
+ polyfill_blend_gouraud,
+ 0,
+ polyfill_blend_tex_wire,
+ polyfill_blend_tex_flat,
+ polyfill_blend_tex_gouraud,
+ 0
};
-struct pimage pimg_fb, pimg_texture;
+struct pimage pfill_fb, pfill_tex;
void polyfill(int mode, struct pvertex *verts, int nverts)
{
++v;
x1 = v->x >> 8;
y1 = v->y >> 8;
- if(clip_line(&x0, &y0, &x1, &y1, 0, 0, pimg_fb.width, pimg_fb.height)) {
+ if(clip_line(&x0, &y0, &x1, &y1, 0, 0, pfill_fb.width, pfill_fb.height)) {
draw_line(x0, y0, x1, y1, color);
}
}
x0 = verts[0].x >> 8;
y0 = verts[0].y >> 8;
- if(clip_line(&x1, &y1, &x0, &y0, 0, 0, pimg_fb.width, pimg_fb.height)) {
+ if(clip_line(&x1, &y1, &x0, &y0, 0, 0, pfill_fb.width, pfill_fb.height)) {
draw_line(x1, y1, x0, y0, color);
}
}
+void polyfill_tex_wire(struct pvertex *verts, int nverts)
+{
+ polyfill_wire(verts, nverts); /* TODO */
+}
+
+void polyfill_blend_wire(struct pvertex *verts, int nverts)
+{
+ polyfill_wire(verts, nverts); /* TODO */
+}
+
+void polyfill_blend_tex_wire(struct pvertex *verts, int nverts)
+{
+ polyfill_wire(verts, nverts); /* TODO */
+}
+
#define NEXTIDX(x) (((x) - 1 + nverts) % nverts)
#define PREVIDX(x) (((x) + 1) % nverts)
+/* XXX
+ * When HIGH_QUALITY is defined, the rasterizer calculates slopes for attribute
+ * interpolation on each scanline separately; otherwise the slope for each
+ * attribute would be calculated once for the whole polygon, which is faster,
+ * but produces some slight quantization artifacts, due to the limited precision
+ * of fixed-point calculations.
+ */
+#define HIGH_QUALITY
+
+/* extra bits of precision to use when interpolating colors.
+ * try tweaking this if you notice strange quantization artifacts.
+ */
+#define COLOR_SHIFT 12
+
+
#define POLYFILL polyfill_flat
#define SCANEDGE scanedge_flat
#undef GOURAUD
#undef TEXMAP
+#undef BLEND
#include "polytmpl.h"
#undef POLYFILL
#undef SCANEDGE
#define SCANEDGE scanedge_gouraud
#define GOURAUD
#undef TEXMAP
+#undef BLEND
#include "polytmpl.h"
#undef POLYFILL
#undef SCANEDGE
-#define POLYFILL polyfill_tex
-#define SCANEDGE scanedge_tex
+#define POLYFILL polyfill_tex_flat
+#define SCANEDGE scanedge_tex_flat
#undef GOURAUD
#define TEXMAP
+#undef BLEND
#include "polytmpl.h"
#undef POLYFILL
#undef SCANEDGE
#define SCANEDGE scanedge_tex_gouraud
#define GOURAUD
#define TEXMAP
+#undef BLEND
+#include "polytmpl.h"
+#undef POLYFILL
+#undef SCANEDGE
+
+#define POLYFILL polyfill_blend_flat
+#define SCANEDGE scanedge_blend_flat
+#undef GOURAUD
+#undef TEXMAP
+#define BLEND
+#include "polytmpl.h"
+#undef POLYFILL
+#undef SCANEDGE
+
+#define POLYFILL polyfill_blend_gouraud
+#define SCANEDGE scanedge_blend_gouraud
+#define GOURAUD
+#undef TEXMAP
+#define BLEND
+#include "polytmpl.h"
+#undef POLYFILL
+#undef SCANEDGE
+
+#define POLYFILL polyfill_blend_tex_flat
+#define SCANEDGE scanedge_blend_tex_flat
+#undef GOURAUD
+#define TEXMAP
+#define BLEND
+#include "polytmpl.h"
+#undef POLYFILL
+#undef SCANEDGE
+
+#define POLYFILL polyfill_blend_tex_gouraud
+#define SCANEDGE scanedge_blend_tex_gouraud
+#define GOURAUD
+#define TEXMAP
+#define BLEND
#include "polytmpl.h"
#undef POLYFILL
#undef SCANEDGE