the sin lut was too small for any kind of reasonable resolution in high

[retrobench] / src / rbench.c

diff --git a/src/rbench.c b/src/rbench.c
index c72dca4..8b9e23f 100644 (file)
--- a/src/rbench.c
+++ b/src/rbench.c
@@ -1,7 +1,9 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <math.h>
 #include "rbench.h"
 #include "treestor.h"
+#include "util.h"
 
 #define DEF_WIDTH      640
 #define DEF_HEIGHT     480
@@ -11,8 +13,84 @@ struct options opt = {
        DEF_WIDTH, DEF_HEIGHT, DEF_BPP
 };
 
+int fb_width, fb_height, fb_bpp, fb_pitch;
+int fb_rshift, fb_gshift, fb_bshift;
+unsigned int fb_rmask, fb_gmask, fb_bmask;
+void *framebuf;
+unsigned int time_msec;
+
+int init(void)
+{
+       printf("initialized graphics %dx%d %dbpp\n", fb_width, fb_height, fb_bpp);
+       printf("  rgb mask: %x %x %x\n", fb_rmask, fb_gmask, fb_bmask);
+       printf("  rgb shift: %d %d %d\n", fb_rshift, fb_gshift, fb_bshift);
+       return 0;
+}
+
+void cleanup(void)
+{
+}
+
+#define XORRGB(x, y, zoom, r, g, b) \
+       do { \
+               int xor = (((x) - fb_width/2) * (zoom) >> 16) ^ (((y) - fb_height/2) * (zoom) >> 16); \
+               (r) = xor >> 2; \
+               (g) = xor >> 1; \
+               (b) = xor; \
+       } while(0)
+
 void redraw(void)
 {
+       int i, j, r, g, b, xoffs, yoffs, zoom;
+       unsigned char *fbptr;
+       uint16_t *fbptr16;
+       uint32_t *fbptr32;
+
+       xoffs = COS(time_msec >> 3) * fb_width >> 15;
+       yoffs = SIN(time_msec >> 2) * fb_height >> 16;
+       zoom = (SIN(time_msec >> 5) >> 1) + 65536;
+
+       switch(fb_bpp) {
+       case 15:
+       case 16:
+               fbptr16 = framebuf;
+               for(i=0; i<fb_height; i++) {
+                       for(j=0; j<fb_width; j++) {
+                               XORRGB(j + xoffs, i + yoffs, zoom, r, g, b);
+                               *fbptr16++ = (((r >> 3) << fb_rshift) & fb_rmask) |
+                                       (((g >> 2) << fb_gshift) & fb_gmask) |
+                                       (((b >> 3) << fb_bshift) & fb_bmask);
+                       }
+                       fbptr16 += (fb_pitch >> 1) - fb_width;
+               }
+               break;
+
+       case 24:
+               fbptr = framebuf;
+               for(i=0; i<fb_height; i++) {
+                       for(j=0; j<fb_width; j++) {
+                               XORRGB(j + xoffs, i + yoffs, zoom, r, g, b);
+                               *fbptr++ = r;
+                               *fbptr++ = g;
+                               *fbptr++ = b;
+                       }
+                       fbptr += fb_pitch - fb_width * 3;
+               }
+               break;
+
+       case 32:
+               fbptr32 = framebuf;
+               for(i=0; i<fb_height; i++) {
+                       for(j=0; j<fb_width; j++) {
+                               XORRGB(j + xoffs, i + yoffs, zoom, r, g, b);
+                               *fbptr32++ = (((r) << fb_rshift) & fb_rmask) |
+                                       (((g) << fb_gshift) & fb_gmask) |
+                                       (((b) << fb_bshift) & fb_bmask);
+                       }
+                       fbptr32 += (fb_pitch >> 2) - fb_width;
+               }
+               break;
+       }
 }
 
 void key_event(int key, int press)