X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=fbgfx;a=blobdiff_plain;f=src%2Ftunnel.c;fp=src%2Ftunnel.c;h=e6a53d53a01c98c03133d2ef517335d9e4b0b77e;hp=221fadcc0624085b7e01f67d292153c202955ca0;hb=15fa7c58b4dd399d2dc3dc0eacbf504e357d66ca;hpb=a97b562de19ac575deddf937b7eba5d6163f7b0e

diff --git a/src/tunnel.c b/src/tunnel.c
index 221fadc..e6a53d5 100644
--- a/src/tunnel.c
+++ b/src/tunnel.c
@@ -3,7 +3,9 @@
 #include <math.h>
 #include <assert.h>
 #include <imago2.h>
+#ifndef NO_THREADS
 #include "tpool.h"
+#endif
 #include "demo.h"
 #include "screen.h"
 
@@ -44,17 +46,23 @@ static struct screen scr = {
 	draw
 };
 
+struct tunmap {
+	int u, v;
+	unsigned char fog;
+};
+
 static int xsz, ysz, vxsz, vysz;
 static int pan_width, pan_height;
-static unsigned int *tunnel_map;
-static unsigned char *tunnel_fog;
+static struct tunmap *tunnel_map;
 
 static int tex_xsz, tex_ysz;
 static unsigned int *tex_pixels;
 static int tex_xshift, tex_yshift;
 static unsigned int tex_xmask, tex_ymask;
 
+#ifndef NO_THREADS
 static struct thread_pool *tpool;
+#endif
 
 static long trans_start, trans_dur;
 static int trans_dir;
@@ -69,8 +77,7 @@ struct screen *tunnel_screen(void)
 static int init(void)
 {
 	int i, j, n;
-	unsigned int *tmap;
-	unsigned char *fog;
+	struct tunmap *tmap;
 	float aspect = (float)fb_width / (float)fb_height;
 
 	switch(fb_depth) {
@@ -97,13 +104,8 @@ static int init(void)
 		fprintf(stderr, "failed to allocate tunnel map\n");
 		return -1;
 	}
-	if(!(tunnel_fog = malloc(vxsz * vysz))) {
-		fprintf(stderr, "failed to allocate tunnel fog map\n");
-		return -1;
-	}
 
 	tmap = tunnel_map;
-	fog = tunnel_fog;
 
 	for(i=0; i<vysz; i++) {
 		float y = 2.0 * (float)i / (float)vysz - 1.0;
@@ -113,13 +115,12 @@ static int init(void)
 			float d = sqrt(x * x + y * y);
 			float tv = d == 0.0 ? 0.0 : 1.0 / d;
 
-			int tx = (int)(tu * 65535.0 * TEX_USCALE) & 0xffff;
-			int ty = (int)(tv * 65535.0 * TEX_VSCALE) & 0xffff;
-
-			int f = (int)(d * 128.0);
+			int fog = (int)(d * 128.0f);
 
-			*tmap++ = (tx << 16) | ty;
-			*fog++ = f > 255 ? 255 : f;
+			tmap->u = (int)(tu * 65535.0 * TEX_USCALE) & 0xffff;
+			tmap->v = (int)(tv * 65535.0 * TEX_VSCALE) & 0xffff;
+			tmap->fog = fog > 255 ? 255 : fog;
+			tmap++;
 		}
 	}
 
@@ -144,10 +145,12 @@ static int init(void)
 	}
 	tex_yshift = n;
 
+#ifndef NO_THREADS
 	if(!(tpool = tpool_create(0))) {
 		fprintf(stderr, "failed to create thread pool\n");
 		return -1;
 	}
+#endif
 
 	/* initialize the constant part of all work items */
 	for(i=0; i<NUM_WORK_ITEMS; i++) {
@@ -161,9 +164,10 @@ static int init(void)
 
 static void destroy(void)
 {
+#ifndef NO_THREADS
 	tpool_destroy(tpool);
+#endif
 	free(tunnel_map);
-	free(tunnel_fog);
 }
 
 static void start(long trans_time)
@@ -221,17 +225,22 @@ static void draw(void)
 		work[i].xoffs = xoffs;
 		work[i].yoffs = yoffs;
 
+#ifdef NO_THREADS
+		work_func(work + i);
+	}
+#else
 		tpool_enqueue(tpool, work + i, work_func, 0);
 	}
 	tpool_wait(tpool);
+#endif
 }
 
-static void tunnel_color(int *rp, int *gp, int *bp, long toffs, unsigned int tpacked, int fog)
+static void tunnel_color(int *rp, int *gp, int *bp, long toffs, struct tunmap *tmap)
 {
 	int r, g, b;
 	unsigned int col;
-	unsigned int tx = (((tpacked >> 16) & 0xffff) << tex_xshift) >> 16;
-	unsigned int ty = ((tpacked & 0xffff) << tex_yshift) >> 16;
+	unsigned int tx = (tmap->u << tex_xshift) >> 16;
+	unsigned int ty = (tmap->v << tex_yshift) >> 16;
 	tx += toffs;
 	ty += toffs << 1;
 
@@ -243,9 +252,9 @@ static void tunnel_color(int *rp, int *gp, int *bp, long toffs, unsigned int tpa
 	g = (col >> 8) & 0xff;
 	b = (col >> 16) & 0xff;
 
-	*rp = (r * fog) >> 8;
-	*gp = (g * fog) >> 8;
-	*bp = (b * fog) >> 8;
+	*rp = (r * tmap->fog) >> 8;
+	*gp = (g * tmap->fog) >> 8;
+	*bp = (b * tmap->fog) >> 8;
 }
 
 #define PACK_RGB16(r, g, b) \
@@ -256,8 +265,7 @@ static void tunnel_color(int *rp, int *gp, int *bp, long toffs, unsigned int tpa
 static void draw_tunnel_range16(void *pix, int xoffs, int yoffs, int starty, int num_lines, long tm)
 {
 	int i, j;
-	unsigned int *tmap = tunnel_map + (starty + yoffs) * vxsz + xoffs;
-	unsigned char *fog = tunnel_fog + (starty + yoffs) * vxsz + xoffs;
+	struct tunmap *tmap = tunnel_map + (starty + yoffs) * vxsz + xoffs;
 
 	long toffs = tm / 4;
 	unsigned int *pixels = (unsigned int*)pix + starty * (fb_width >> 1);
@@ -267,20 +275,18 @@ static void draw_tunnel_range16(void *pix, int xoffs, int yoffs, int starty, int
 			unsigned int col;
 			int r, g, b;
 
-			tunnel_color(&r, &g, &b, toffs, tmap[j], fog[j]);
+			tunnel_color(&r, &g, &b, toffs, tmap + j);
 			col = PACK_RGB16(r, g, b);
 			*pixels++ = (col << 16) | col;
 		}
 		tmap += vxsz;
-		fog += vxsz;
 	}
 }
 
 static void draw_tunnel_range32(void *pix, int xoffs, int yoffs, int starty, int num_lines, long tm)
 {
 	int i, j;
-	unsigned int *tmap = tunnel_map + (starty + yoffs) * vxsz + xoffs;
-	unsigned char *fog = tunnel_fog + (starty + yoffs) * vxsz + xoffs;
+	struct tunmap *tmap = tunnel_map + (starty + yoffs) * vxsz + xoffs;
 
 	long toffs = tm / 4;
 	unsigned int *pixels = (unsigned int*)pix + starty * fb_width;
@@ -290,14 +296,13 @@ static void draw_tunnel_range32(void *pix, int xoffs, int yoffs, int starty, int
 			unsigned int col;
 			int r, g, b;
 
-			tunnel_color(&r, &g, &b, toffs, tmap[j], fog[j]);
+			tunnel_color(&r, &g, &b, toffs, tmap + j);
 			col = PACK_RGB32(r, g, b);
 
 			*pixels++ = col;
 			*pixels++ = col;
 		}
 		tmap += vxsz;
-		fog += vxsz;
 	}
 }