mouse cursor drawing part2

[dosrtxon] / src / demo.c

diff --git a/src/demo.c b/src/demo.c
index 0874104..06b33f3 100644 (file)
--- 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;