X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fscr%2Fgreets.c;fp=src%2Fscr%2Fgreets.c;h=8b128c65eece58618492f8a689dc5c42434f6110;hp=0000000000000000000000000000000000000000;hb=ba648ddfc62fc6d3f47294aa8bfc10ea6ca3f479;hpb=3398fc6c4188104048f99b650a6cb90beda9b6ed

diff --git a/src/scr/greets.c b/src/scr/greets.c
new file mode 100644
index 0000000..8b128c6
--- /dev/null
+++ b/src/scr/greets.c
@@ -0,0 +1,184 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include "demo.h"
+#include "3dgfx.h"
+#include "screen.h"
+#include "cfgopt.h"
+#include "imago2.h"
+#include "util.h"
+#include "gfxutil.h"
+#include "timer.h"
+#include "smoketxt.h"
+
+#ifdef MSDOS
+#include "dos/gfx.h"	/* for wait_vsync assembly macro */
+#else
+void wait_vsync(void);
+#endif
+
+#define BLUR_RAD	5
+
+
+static int init(void);
+static void destroy(void);
+static void start(long trans_time);
+static void draw(void);
+
+
+static struct screen scr = {
+	"greets",
+	init,
+	destroy,
+	start, 0,
+	draw
+};
+
+static long start_time;
+
+static struct smktxt *stx;
+
+static uint16_t *cur_smokebuf, *prev_smokebuf;
+static int smokebuf_size;
+#define smokebuf_start	(cur_smokebuf < prev_smokebuf ? cur_smokebuf : prev_smokebuf)
+#define swap_smoke_buffers() \
+	do { \
+		uint16_t *tmp = cur_smokebuf; \
+		cur_smokebuf = prev_smokebuf; \
+		prev_smokebuf = tmp; \
+	} while(0)
+
+static float cam_theta, cam_phi = 25;
+static float cam_dist = 3;
+
+struct screen *greets_screen(void)
+{
+	return &scr;
+}
+
+
+static int init(void)
+{
+	if(!(stx = create_smktxt("data/greets1.png", "data/vfield1"))) {
+		return -1;
+	}
+
+	smokebuf_size = fb_width * fb_height * sizeof *cur_smokebuf;
+	if(!(cur_smokebuf = malloc(smokebuf_size * 2))) {
+		perror("failed to allocate smoke framebuffer");
+		return -1;
+	}
+	prev_smokebuf = cur_smokebuf + fb_width * fb_height;
+
+	return 0;
+}
+
+static void destroy(void)
+{
+	free(smokebuf_start);
+	destroy_smktxt(stx);
+}
+
+static void start(long trans_time)
+{
+	g3d_matrix_mode(G3D_PROJECTION);
+	g3d_load_identity();
+	g3d_perspective(50.0, 1.3333333, 0.5, 100.0);
+
+	memset(smokebuf_start, 0, smokebuf_size * 2);
+
+	start_time = time_msec;
+}
+
+static void update(void)
+{
+	static long prev_msec;
+	static int prev_mx, prev_my;
+	static unsigned int prev_bmask;
+
+	long msec = time_msec - start_time;
+	float dt = (msec - prev_msec) / 1000.0f;
+	prev_msec = msec;
+
+	if(mouse_bmask) {
+		if((mouse_bmask ^ prev_bmask) == 0) {
+			int dx = mouse_x - prev_mx;
+			int dy = mouse_y - prev_my;
+
+			if(dx || dy) {
+				if(mouse_bmask & 1) {
+					cam_theta += dx * 1.0;
+					cam_phi += dy * 1.0;
+
+					if(cam_phi < -90) cam_phi = -90;
+					if(cam_phi > 90) cam_phi = 90;
+				}
+				if(mouse_bmask & 4) {
+					cam_dist += dy * 0.5;
+
+					if(cam_dist < 0) cam_dist = 0;
+				}
+			}
+		}
+	}
+	prev_mx = mouse_x;
+	prev_my = mouse_y;
+	prev_bmask = mouse_bmask;
+
+	update_smktxt(stx, dt);
+}
+
+static void draw(void)
+{
+	int i, j;
+	uint16_t *dest, *src;
+	unsigned long msec;
+	static unsigned long last_swap;
+
+	update();
+
+	g3d_matrix_mode(G3D_MODELVIEW);
+	g3d_load_identity();
+	g3d_translate(0, 0, -cam_dist);
+	g3d_rotate(cam_phi, 1, 0, 0);
+	g3d_rotate(cam_theta, 0, 1, 0);
+	if(opt.sball) {
+		g3d_mult_matrix(sball_matrix);
+	}
+
+	memcpy(cur_smokebuf, prev_smokebuf, smokebuf_size);
+
+	g3d_framebuffer(fb_width, fb_height, cur_smokebuf);
+	draw_smktxt(stx);
+	g3d_framebuffer(fb_width, fb_height, fb_pixels);
+
+	dest = fb_pixels;
+	src = cur_smokebuf;
+	for(i=0; i<fb_height; i++) {
+		for(j=0; j<fb_width; j++) {
+			unsigned int alpha = *src++;
+			*dest++ = PACK_RGB16(alpha, alpha, alpha);
+		}
+	}
+
+	/*perf_start();*/
+	blur_grey_horiz(prev_smokebuf, cur_smokebuf, fb_width, fb_height, BLUR_RAD, 240);
+	/*
+	perf_end();
+	printf("blur perf: %lu\n", (unsigned long)perf_interval_count);
+	*/
+	blur_grey_vert(cur_smokebuf, prev_smokebuf, fb_width, fb_height, BLUR_RAD, 240);
+	swap_smoke_buffers();
+
+	msec = get_msec();
+	if(msec - last_swap < 16) {
+		wait_vsync();
+	}
+	if(!opt.vsync) {
+		wait_vsync();
+	}
+	swap_buffers(fb_pixels);
+	last_swap = get_msec();
+}