X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=fbgfx;a=blobdiff_plain;f=src%2Ftunnel.c;h=221fadcc0624085b7e01f67d292153c202955ca0;hp=85ca7b42fa27f2a6576e07db94657c66e6d6bbac;hb=55eb7990ac9033d9a0185dc9238365b5624be64e;hpb=6c34c443c62d0b40c91aee5f28985ee99c944caa

diff --git a/src/tunnel.c b/src/tunnel.c
index 85ca7b4..221fadc 100644
--- a/src/tunnel.c
+++ b/src/tunnel.c
@@ -1,24 +1,51 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <assert.h>
 #include <imago2.h>
 #include "tpool.h"
-#include "tunnel.h"
+#include "demo.h"
+#include "screen.h"
+
+#define VSCALE	1.5
 
 #define TEX_FNAME	"data/grid.png"
 #define TEX_USCALE	4
 #define TEX_VSCALE	2
 
-#define USCALE	2
-#define VSCALE	1
+#define NUM_WORK_ITEMS	8
 
-extern unsigned long time_msec;
+static struct work {
+	void *pixels;
+	int starty, num_lines;
+	long tm;
+	int xoffs, yoffs;
+} work[NUM_WORK_ITEMS];
 
-static void draw_tunnel_range(unsigned short *pixels, int starty, int num_lines);
+static int init(void);
+static void destroy(void);
+static void start(long trans_time);
+static void stop(long trans_time);
+static void draw(void);
+
+static void (*draw_tunnel_range)(void*, int, int, int, int, long);
+
+static void draw_tunnel_range16(void *pixels, int xoffs, int yoffs, int starty, int num_lines, long tm);
+static void draw_tunnel_range32(void *pixels, int xoffs, int yoffs, int starty, int num_lines, long tm);
 static int count_bits(unsigned int x);
 static int count_zeros(unsigned int x);
 
+static struct screen scr = {
+	"tunnel",
+	init,
+	destroy,
+	start,
+	stop,
+	draw
+};
+
 static int xsz, ysz, vxsz, vysz;
+static int pan_width, pan_height;
 static unsigned int *tunnel_map;
 static unsigned char *tunnel_fog;
 
@@ -29,18 +56,42 @@ static unsigned int tex_xmask, tex_ymask;
 
 static struct thread_pool *tpool;
 
+static long trans_start, trans_dur;
+static int trans_dir;
 
-int init_tunnel(int x, int y)
+
+struct screen *tunnel_screen(void)
+{
+	return &scr;
+}
+
+
+static int init(void)
 {
 	int i, j, n;
 	unsigned int *tmap;
 	unsigned char *fog;
-	float aspect = (float)x / (float)y;
+	float aspect = (float)fb_width / (float)fb_height;
+
+	switch(fb_depth) {
+	case 16:
+		draw_tunnel_range = draw_tunnel_range16;
+		break;
+	case 32:
+		draw_tunnel_range = draw_tunnel_range32;
+		break;
+	default:
+		fprintf(stderr, "unsupported color depth: %d\n", fb_depth);
+		return -1;
+	}
+
+	xsz = fb_width / 2;
+	ysz = fb_height;
+	vxsz = xsz * VSCALE;
+	vysz = ysz * VSCALE;
 
-	xsz = x;
-	ysz = y;
-	vxsz = xsz / USCALE;
-	vysz = ysz / VSCALE;
+	pan_width = vxsz - xsz;
+	pan_height = vysz - ysz;
 
 	if(!(tunnel_map = malloc(vxsz * vysz * sizeof *tunnel_map))) {
 		fprintf(stderr, "failed to allocate tunnel map\n");
@@ -65,7 +116,7 @@ int init_tunnel(int x, int y)
 			int tx = (int)(tu * 65535.0 * TEX_USCALE) & 0xffff;
 			int ty = (int)(tv * 65535.0 * TEX_VSCALE) & 0xffff;
 
-			int f = (int)(d * 95.0);
+			int f = (int)(d * 128.0);
 
 			*tmap++ = (tx << 16) | ty;
 			*fog++ = f > 255 ? 255 : f;
@@ -98,97 +149,155 @@ int init_tunnel(int x, int y)
 		return -1;
 	}
 
+	/* initialize the constant part of all work items */
+	for(i=0; i<NUM_WORK_ITEMS; i++) {
+		int num_lines = ysz / NUM_WORK_ITEMS;
+		work[i].pixels = fb_pixels;
+		work[i].starty = i * num_lines;
+	}
+
 	return 0;
 }
 
-void destroy_tunnel(void)
+static void destroy(void)
 {
 	tpool_destroy(tpool);
 	free(tunnel_map);
 	free(tunnel_fog);
 }
 
-#define NUM_WORK_ITEMS	32
+static void start(long trans_time)
+{
+	if(trans_time) {
+		trans_start = time_msec;
+		trans_dur = trans_time;
+		trans_dir = 1;
+	}
+}
+
+static void stop(long trans_time)
+{
+	if(trans_time) {
+		trans_start = time_msec;
+		trans_dur = trans_time;
+		trans_dir = -1;
+	}
+}
 
-static struct work {
-	unsigned short *pixels;
-	int starty, num_lines;
-} work[NUM_WORK_ITEMS];
 
 static void work_func(void *cls)
 {
 	struct work *w = (struct work*)cls;
-	draw_tunnel_range(w->pixels, w->starty, w->num_lines);
+	draw_tunnel_range(w->pixels, w->xoffs, w->yoffs, w->starty, w->num_lines, w->tm);
 }
 
-void draw_tunnel(unsigned short *pixels)
+static void draw(void)
 {
-	int i, num_lines = vysz / NUM_WORK_ITEMS;
+	int i, num_lines = ysz / NUM_WORK_ITEMS;
+	int draw_lines = num_lines;
+	float t;
+	int xoffs, yoffs;
+
+	if(trans_dir) {
+		long interval = time_msec - trans_start;
+		int progr = num_lines * interval / trans_dur;
+		if(trans_dir < 0) {
+			draw_lines = num_lines - progr - 1;
+		} else {
+			draw_lines = progr;
+		}
+		if(progr >= num_lines) {
+			trans_dir = 0;
+		}
+	}
+
+	t = time_msec / 10000.0;
+	xoffs = (int)(cos(t * 3.0) * pan_width / 2) + pan_width / 2;
+	yoffs = (int)(sin(t * 4.0) * pan_height / 2) + pan_height / 2;
+
 	for(i=0; i<NUM_WORK_ITEMS; i++) {
-		work[i].pixels = pixels;
-		work[i].starty = i * num_lines;
-		work[i].num_lines = num_lines;
+		work[i].num_lines = draw_lines;
+		work[i].tm = time_msec;
+		work[i].xoffs = xoffs;
+		work[i].yoffs = yoffs;
 
 		tpool_enqueue(tpool, work + i, work_func, 0);
 	}
 	tpool_wait(tpool);
 }
 
+static void tunnel_color(int *rp, int *gp, int *bp, long toffs, unsigned int tpacked, int fog)
+{
+	int r, g, b;
+	unsigned int col;
+	unsigned int tx = (((tpacked >> 16) & 0xffff) << tex_xshift) >> 16;
+	unsigned int ty = ((tpacked & 0xffff) << tex_yshift) >> 16;
+	tx += toffs;
+	ty += toffs << 1;
+
+	tx &= tex_xmask;
+	ty &= tex_ymask;
+
+	col = tex_pixels[(ty << tex_xshift) + tx];
+	r = col & 0xff;
+	g = (col >> 8) & 0xff;
+	b = (col >> 16) & 0xff;
+
+	*rp = (r * fog) >> 8;
+	*gp = (g * fog) >> 8;
+	*bp = (b * fog) >> 8;
+}
+
 #define PACK_RGB16(r, g, b) \
-	(((((r) >> 3) & 0x1f) << 11) | ((((g) >> 2) & 0x3f) << 5) | ((b) & 0x1f))
+	(((((r) >> 3) & 0x1f) << 11) | ((((g) >> 2) & 0x3f) << 5) | (((b) >> 3) & 0x1f))
+#define PACK_RGB32(r, g, b) \
+	((((r) & 0xff) << 16) | (((g) & 0xff) << 8) | ((b) & 0xff))
 
-static void draw_tunnel_range(unsigned short *pixels, int starty, int num_lines)
+static void draw_tunnel_range16(void *pix, int xoffs, int yoffs, int starty, int num_lines, long tm)
 {
-	int i, j, k, r, g, b;
-	unsigned int *tmap = tunnel_map + starty * vxsz;
-	unsigned char *fog = tunnel_fog + starty * vxsz;
+	int i, j;
+	unsigned int *tmap = tunnel_map + (starty + yoffs) * vxsz + xoffs;
+	unsigned char *fog = tunnel_fog + (starty + yoffs) * vxsz + xoffs;
 
-	long toffs = time_msec / 4;
-	pixels += starty * xsz * VSCALE;
+	long toffs = tm / 4;
+	unsigned int *pixels = (unsigned int*)pix + starty * (fb_width >> 1);
 
 	for(i=0; i<num_lines; i++) {
-		for(j=0; j<vxsz; j++) {
-			unsigned short *ptr;
+		for(j=0; j<xsz; j++) {
 			unsigned int col;
-			unsigned int tx = (((*tmap >> 16) & 0xffff) << tex_xshift) >> 16;
-			unsigned int ty = ((*tmap & 0xffff) << tex_yshift) >> 16;
-			++tmap;
-
-			tx += toffs;
-			ty += toffs << 1;
-
-			tx &= tex_xmask;
-			ty &= tex_ymask;
-
-			col = tex_pixels[(ty << tex_xshift) + tx];
-			r = col & 0xff;
-			g = (col >> 8) & 0xff;
-			b = (col >> 16) & 0xff;
-
-			r = (r * *fog) >> 8;
-			g = (g * *fog) >> 8;
-			b = (b * *fog) >> 8;
-			++fog;
-
-			col = ((((r >> 3) & 0x1f) << 11) | (((g >> 2) & 0x3f) << 5) | ((b >> 3) & 0x1f));
-
-			ptr = pixels;
-			for(k=0; k<VSCALE; k++) {
-				switch(USCALE) {
-				case 4:
-					ptr[3] = col;
-				case 3:
-					ptr[2] = col;
-				case 2:
-					ptr[1] = col;
-				case 1:
-					*ptr = col;
-				}
-				ptr += xsz;
-			}
-			pixels += USCALE;
+			int r, g, b;
+
+			tunnel_color(&r, &g, &b, toffs, tmap[j], fog[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;
+
+	long toffs = tm / 4;
+	unsigned int *pixels = (unsigned int*)pix + starty * fb_width;
+
+	for(i=0; i<num_lines; i++) {
+		for(j=0; j<xsz; j++) {
+			unsigned int col;
+			int r, g, b;
+
+			tunnel_color(&r, &g, &b, toffs, tmap[j], fog[j]);
+			col = PACK_RGB32(r, g, b);
+
+			*pixels++ = col;
+			*pixels++ = col;
 		}
-		pixels += xsz * (VSCALE - 1);
+		tmap += vxsz;
+		fog += vxsz;
 	}
 }