optimizations and best color depth attempt

[fbgfx] / src / main.c

diff --git a/src/main.c b/src/main.c
index 8752567..f0588c0 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -4,6 +4,9 @@
 #include "fbgfx.h"
 #include "fbevents.h"
 #include "tunnel.h"
+#include "timer.h"
+
+unsigned long start_msec, time_msec, num_frames;
 
 static void keyboard(int key, int pressed, void *cls);
 static void mouse(int bn, int pressed, int x, int y, void *cls);
@@ -17,14 +20,26 @@ static int quit;
 
 int main(void)
 {
+       int i, trybpp[] = {32, 24, 16, 0};
+
        fbgfx_save_video_mode();
-       if(!(vmem = fbgfx_set_video_mode(800, 600, 16))) {
-               return 1;
-       }
        fbgfx_get_video_mode(&xsz, &ysz, &depth);
-       if(depth != 16) {
+
+       for(i=0; trybpp[i]; i++) {
+               if(!(vmem = fbgfx_set_video_mode(xsz, ysz, trybpp[i]))) {
+                       continue;
+               }
+               fbgfx_get_video_mode(&xsz, &ysz, &depth);
+               if(depth == trybpp[i]) {
+                       break;
+               }
+               fprintf(stderr, "failed to set color depth: %dbpp\n", trybpp[i]);
+       }
+       if(trybpp[i] == 0) {
+               fprintf(stderr, "no usable color depths found\n");
                goto end;
        }
+
        if(fbev_init() == -1) {
                goto end;
        }
@@ -32,21 +47,29 @@ int main(void)
        fbev_mbutton(mouse, 0);
        fbev_mmotion(motion, 0);
 
-       if(init_tunnel(xsz, ysz) == -1) {
+       if(init_tunnel(xsz, ysz, depth) == -1) {
                goto end;
        }
 
+       start_msec = get_time_msec();
        for(;;) {
                fbev_update();
                if(quit) break;
 
+               time_msec = get_time_msec() - start_msec;
+
                draw_tunnel(vmem);
+               ++num_frames;
        }
 
+       time_msec = get_time_msec() - start_msec;
 end:
        destroy_tunnel();
        fbev_shutdown();
        fbgfx_restore_video_mode();
+       if(num_frames && time_msec) {
+               printf("\ravg framerate: %.1f\n", (float)num_frames / ((float)time_msec / 1000.0));
+       }
        return 0;
 }
 
@@ -58,7 +81,8 @@ static void keyboard(int key, int pressed, void *cls)
        case 27:
        case 'q':
        case 'Q':
-               exit(0);
+               quit = 1;
+               break;
        }
 }