#include <string.h>
#include <math.h>
#include <assert.h>
+#if defined(__WATCOMC__) || defined(_MSC_VER) || defined(__DJGPP__)
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
#include "3dgfx.h"
#include "gfxutil.h"
#include "polyfill.h"
fprintf(stderr, "failed to allocate G3D context\n");
return -1;
}
+ st->opt = G3D_CLIP_FRUSTUM;
st->fill_mode = POLYFILL_FLAT;
for(i=0; i<G3D_NUM_MATRICES; i++) {
g3d_viewport(0, 0, width, height);
}
+/* set the framebuffer pointer, without resetting the size */
+void g3d_framebuffer_addr(void *pixels)
+{
+ st->pixels = pixels;
+ pfill_fb.pixels = pixels;
+}
+
void g3d_viewport(int x, int y, int w, int h)
{
st->vport[0] = x;
void g3d_draw_indexed(int prim, const struct g3d_vertex *varr, int varr_size,
const uint16_t *iarr, int iarr_size)
{
- int i, j, nfaces;
+ int i, j, vnum, nfaces;
struct pvertex pv[16];
struct g3d_vertex v[16];
- int vnum = prim; /* primitive vertex counts correspond to enum values */
int mvtop = st->mtop[G3D_MODELVIEW];
int ptop = st->mtop[G3D_PROJECTION];
struct g3d_vertex *tmpv;
memcpy(st->norm_mat, st->mat[G3D_MODELVIEW][mvtop], 16 * sizeof(float));
st->norm_mat[12] = st->norm_mat[13] = st->norm_mat[14] = 0.0f;
- nfaces = (iarr ? iarr_size : varr_size) / vnum;
+ nfaces = (iarr ? iarr_size : varr_size) / prim;
for(j=0; j<nfaces; j++) {
vnum = prim; /* reset vnum for each iteration */
}
/* clipping */
- for(i=0; i<6; i++) {
- memcpy(tmpv, v, vnum * sizeof *v);
-
- if(clip_frustum(v, &vnum, tmpv, vnum, i) < 0) {
- /* polygon completely outside of view volume. discard */
- vnum = 0;
- break;
+ if(st->opt & G3D_CLIP_FRUSTUM) {
+ for(i=0; i<6; i++) {
+ memcpy(tmpv, v, vnum * sizeof *v);
+
+ if(clip_frustum(v, &vnum, tmpv, vnum, i) < 0) {
+ /* polygon completely outside of view volume. discard */
+ vnum = 0;
+ break;
+ }
}
- }
- if(!vnum) continue;
+ if(!vnum) continue;
+ }
for(i=0; i<vnum; i++) {
if(v[i].w != 0.0f) {