rubber band in platform-specific code

[retroray] / src / dos / main.c

diff --git a/src/dos/main.c b/src/dos/main.c
index 16f53ba..e6e2346 100644 (file)
--- a/src/dos/main.c
+++ b/src/dos/main.c
@@ -44,6 +44,8 @@ static uint32_t *vmem;
 static int quit, disp_pending, dirty_valid;
 static rtk_rect dirty;
 static int mx, my;
+static rtk_rect rband, prev_rband;
+
 
 int main(int argc, char **argv)
 {
@@ -198,20 +200,28 @@ void app_swap_buffers(void)
        if(opt.vsync) {
                vid_vsync();
        }
-       if(!dirty_valid) return;
-       if(dirty.width < win_width || dirty.height < win_height) {
-               uint32_t *src = framebuf + dirty.y * win_width + dirty.x;
-               vid_blit32(dirty.x, dirty.y, dirty.width, dirty.height, src, 0);
+       if(dirty_valid) {
+               if(dirty.width < win_width || dirty.height < win_height) {
+                       uint32_t *src = framebuf + dirty.y * win_width + dirty.x;
+                       vid_blit32(dirty.x, dirty.y, dirty.width, dirty.height, src, 0);
 
-               if(mx >= dirty.x && my >= dirty.y && mx < dirty.x + dirty.width && my < dirty.y + dirty.height) {
+                       if(mx >= dirty.x && my >= dirty.y && mx < dirty.x + dirty.width && my < dirty.y + dirty.height) {
+                               draw_cursor(mx, my);
+                       }
+               } else {
+                       vid_blitfb32(framebuf, 0);
                        draw_cursor(mx, my);
                }
-       } else {
-               vid_blitfb32(framebuf, 0);
-               draw_cursor(mx, my);
+               dirty_valid = 0;
        }
 
-       dirty_valid = 0;
+       if(rband.width) {
+               if(prev_rband.width) {
+                       draw_rband(&prev_rband);
+               }
+               draw_rband(&rband);
+               prev_rband = rband;
+       }
 }
 
 void app_quit(void)
@@ -231,6 +241,19 @@ void app_vsync(int vsync)
 {
 }
 
+void app_rband(int x, int y, int w, int h)
+{
+       if(!(w | h)) {
+               w = h = 0;
+               prev_rband.width = 0;
+       }
+
+       rband.x = x;
+       rband.y = y;
+       rband.width = w;
+       rband.height = h;
+}
+
 static void draw_cursor(int x, int y)
 {
        int i;
@@ -244,3 +267,27 @@ static void draw_cursor(int x, int y)
                if(x < win_width - offs - 1) fbptr[offs] ^= 0xffffff;
        }
 }
+
+static void draw_rband(rtk_rect *r)
+{
+       int i;
+       rtk_rect rect;
+       uint32_t *fbptr, *bptr;
+
+       rect = *r;
+       rtk_fix_rect(&rect);
+
+       fbptr = vmem + rect.y * win_width + rect.x;
+       bptr = fbptr + win_width * (rect.height - 1);
+
+       for(i=0; i<rect.width; i++) {
+               fbptr[i] ^= 0xffffff;
+               bptr[i] ^= 0xffffff;
+       }
+       fbptr += win_width;
+       for(i=0; i<rect.height-2; i++) {
+               fbptr[0] ^= 0xffffff;
+               fbptr[rect.width - 1] ^= 0xffffff;
+               fbptr += win_width;
+       }
+}