X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2F3dgfx.c;h=a642c1e42da16918510da9dcdf6c1770021a167b;hp=a4af73a5015329f9dafb34440146c62adadf3a0e;hb=5029eb9f7a538dd58e1c66c0945784acac8cc58b;hpb=45f6f46fe758d15aafccdb69ae837fc7d84ee466

diff --git a/src/3dgfx.c b/src/3dgfx.c
index a4af73a..a642c1e 100644
--- a/src/3dgfx.c
+++ b/src/3dgfx.c
@@ -3,6 +3,11 @@
 #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"
@@ -77,6 +82,7 @@ int g3d_init(void)
 		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++) {
@@ -111,6 +117,13 @@ void g3d_framebuffer(int width, int height, void *pixels)
 	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;
@@ -398,10 +411,9 @@ void g3d_draw(int prim, const struct g3d_vertex *varr, int varr_size)
 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;
@@ -412,7 +424,7 @@ void g3d_draw_indexed(int prim, const struct g3d_vertex *varr, int varr_size,
 	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 */
@@ -434,17 +446,19 @@ void g3d_draw_indexed(int prim, const struct g3d_vertex *varr, int varr_size,
 		}
 
 		/* 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) {