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 005013c..8b9e23f 100644 (file)
--- a/src/rbench.c
+++ b/src/rbench.c
@@ -1,9 +1,9 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdint.h>
 #include <math.h>
 #include "rbench.h"
 #include "treestor.h"
+#include "util.h"
 
 #define DEF_WIDTH      640
 #define DEF_HEIGHT     480
@@ -14,11 +14,16 @@ struct options opt = {
 };
 
 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;
 }
 
@@ -28,7 +33,7 @@ void cleanup(void)
 
 #define XORRGB(x, y, zoom, r, g, b) \
        do { \
-               int xor = (((x) - fb_width/2) * (zoom) >> 10) ^ (((y) - fb_height/2) * (zoom) >> 10); \
+               int xor = (((x) - fb_width/2) * (zoom) >> 16) ^ (((y) - fb_height/2) * (zoom) >> 16); \
                (r) = xor >> 2; \
                (g) = xor >> 1; \
                (b) = xor; \
@@ -40,30 +45,21 @@ void redraw(void)
        unsigned char *fbptr;
        uint16_t *fbptr16;
        uint32_t *fbptr32;
-       float t = (float)time_msec / 1000.0f;
 
-       xoffs = cos(t * 0.5f) * DEF_WIDTH * 2;
-       yoffs = sin(t) * DEF_HEIGHT;
-       zoom = (sin(t * 0.75f) * 0.5f + 1.0f) * 1024.0f;
+       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:
-               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 & 0x1f) << 10) | ((g & 0x1f) << 5) | (b & 0x1f);
-                       }
-                       fbptr16 += (fb_pitch >> 1) - fb_width;
-               }
-               break;
-
        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 & 0x1f) << 11) | ((g & 0x3f) << 5) | (b & 0x1f);
+                               *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;
                }
@@ -87,7 +83,9 @@ void redraw(void)
                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 & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff);
+                               *fbptr32++ = (((r) << fb_rshift) & fb_rmask) |
+                                       (((g) << fb_gshift) & fb_gmask) |
+                                       (((b) << fb_bshift) & fb_bmask);
                        }
                        fbptr32 += (fb_pitch >> 2) - fb_width;
                }