X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosrtxon;a=blobdiff_plain;f=src%2Fdemo.c;h=06b33f39ba9be5bb8bbf6b16b23f615db75c8bb1;hp=0874104136a7cfdd7ecd409f4123fb299b360079;hb=d6acf0b82bd026565f6b26bb00e42b4c126598dd;hpb=1d7a39ac5b29d684972014960289032c12b64baf

diff --git a/src/demo.c b/src/demo.c
index 0874104..06b33f3 100644
--- a/src/demo.c
+++ b/src/demo.c
@@ -13,8 +13,11 @@
 #include "tinyfps.h"
 #include "util.h"
 
-int fb_width = 320;
-int fb_height = 240;
+#define FB_WIDTH	320
+#define FB_HEIGHT	240
+
+int fb_width = FB_WIDTH;
+int fb_height = FB_HEIGHT;
 int fb_bpp = 16;
 uint16_t *fb_pixels, *vmem_back, *vmem_front;
 unsigned long time_msec;
@@ -102,6 +105,63 @@ void demo_draw(void)
 	++nframes;
 }
 
+
+
+#define DEST(x, y)	dest[(y) * FB_WIDTH + (x)]
+void draw_mouse_pointer(uint16_t *fb)
+{
+	uint16_t *dest = fb + mouse_y * FB_WIDTH + mouse_x;
+	int ylines = FB_HEIGHT - mouse_y;
+
+	switch(ylines) {
+	default:
+	case 10:
+		DEST(0, 9) = 0xffff;
+	case 9:
+		DEST(0, 8) = 0xffff;
+		DEST(1, 8) = 0xffff;
+	case 8:
+		DEST(0, 7) = 0xffff;
+		DEST(2, 7) = 0xffff;
+		DEST(1, 7) = 0;
+	case 7:
+		DEST(6, 6) = 0xffff;
+		DEST(0, 6) = 0xffff;
+		DEST(3, 6) = 0xffff;
+		DEST(4, 6) = 0xffff;
+		DEST(5, 6) = 0xffff;
+		DEST(1, 6) = 0;
+		DEST(2, 6) = 0;
+	case 6:
+		DEST(5, 5) = 0xffff;
+		DEST(0, 5) = 0xffff;
+		DEST(1, 5) = 0;
+		DEST(2, 5) = 0;
+		DEST(3, 5) = 0;
+		DEST(4, 5) = 0;
+	case 5:
+		DEST(4, 4) = 0xffff;
+		DEST(0, 4) = 0xffff;
+		DEST(1, 4) = 0;
+		DEST(2, 4) = 0;
+		DEST(3, 4) = 0;
+	case 4:
+		DEST(3, 3) = 0xffff;
+		DEST(0, 3) = 0xffff;
+		DEST(1, 3) = 0;
+		DEST(2, 3) = 0;
+	case 3:
+		DEST(2, 2) = 0xffff;
+		DEST(0, 2) = 0xffff;
+		DEST(1, 2) = 0;
+	case 2:
+		DEST(1, 1) = 0xffff;
+		DEST(0, 1) = 0xffff;
+	case 1:
+		DEST(0, 0) = 0xffff;
+	}
+}
+
 static void change_screen(int idx)
 {
 	printf("change screen %d\n", idx);
@@ -228,6 +288,7 @@ void mouse_orbit_update(float *theta, float *phi, float *dist)
 			}
 		}
 	}
+
 	prev_mx = mouse_x;
 	prev_my = mouse_y;
 	prev_bmask = mouse_bmask;