Add support for dropping files onto the window to mount them as a disk

src/bus.c

@@ -258,3 +258,13 @@ int bus_io_write(void *user, uint32_t value, uint32_t port) {
 
     return 0;
 }
+
+void drop_file(char *filename) {
+    int last_id = 0;
+    for (int i = 0; i < 4; i++) {
+        if (disk_controller.disks[i].size != 0) {
+            last_id++;
+        }
+    }
+    new_disk(filename, last_id);
+}

src/bus.h

@@ -2,3 +2,4 @@
 
 int bus_io_read(void *user, uint32_t *value, uint32_t port);
 int bus_io_write(void *user, uint32_t value, uint32_t port);
+void drop_file(char *filename);

src/main.c

@@ -88,7 +88,8 @@ int main(int argc, char *argv[]) {
         key_released,
         mouse_pressed,
         mouse_released,
-        mouse_moved
+        mouse_moved,
+        drop_file
     );
 
     ScreenInit();

src/screen.c

@@ -115,7 +115,6 @@ int ScreenProcessEvents() {
                 break;
             }
 
-
             case SDL_MOUSEBUTTONUP: {
                 if (MainScreen.MouseReleased)
                     MainScreen.MouseReleased(event.button.button);
@@ -131,6 +130,14 @@ int ScreenProcessEvents() {
                 if (MainScreen.KeyReleased)
                     MainScreen.KeyReleased(event.key.keysym.scancode);
                 break;
+
+            case SDL_DROPFILE:
+                if (MainScreen.DropFile) {
+                    char *file = event.drop.file;
+                    MainScreen.DropFile(file);
+                    SDL_free(file);
+                }
+                break;
         }
     }
 
@@ -160,7 +167,8 @@ void ScreenCreate(
     ScreenKeyReleasedF keyreleased,
     ScreenMousePressedF mousepressed,
     ScreenMouseReleasedF mousereleased,
-    ScreenMouseMovedF mousemoved
+    ScreenMouseMovedF mousemoved,
+    ScreenDropFileF dropfile
 ) {
 
     if (w > WindowWidth)
@@ -178,4 +186,5 @@ void ScreenCreate(
     MainScreen.MousePressed = mousepressed;
     MainScreen.MouseReleased = mousereleased;
     MainScreen.MouseMoved = mousemoved;
+    MainScreen.DropFile = dropfile;
 }

src/screen.h

@@ -10,6 +10,7 @@ typedef void (*ScreenKeyReleasedF)(int sdl_scancode);
 typedef void (*ScreenMousePressedF)(int button);
 typedef void (*ScreenMouseReleasedF)(int button);
 typedef void (*ScreenMouseMovedF)(int dx, int dy);
+typedef void (*ScreenDropFileF)(char *filename);
 
 struct Screen {
     int Width;
@@ -22,6 +23,7 @@ struct Screen {
     ScreenMousePressedF MousePressed;
     ScreenMouseReleasedF MouseReleased;
     ScreenMouseMovedF MouseMoved;
+    ScreenDropFileF DropFile;
 };
 
 void ScreenInit();
@@ -39,5 +41,6 @@ void ScreenCreate(
     ScreenKeyReleasedF keyreleased,
     ScreenMousePressedF mousepressed,
     ScreenMouseReleasedF mousereleased,
-    ScreenMouseMovedF mousemoved
+    ScreenMouseMovedF mousemoved,
+    ScreenDropFileF dropfile
 );