reflect dpi change events appropriately in font size / window pos & size

Author: ryanfleury

src/os/gfx/win32/os_gfx_win32.c

@@ -548,7 +548,14 @@ os_w32_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
       case WM_DPICHANGED:
       {
         F32 new_dpi = (F32)(wParam & 0xffff);
+        RECT suggested_new_rect = *(RECT *)lParam;
         window->dpi = new_dpi;
+        SetWindowPos(window->hwnd, 0,
+                     suggested_new_rect.left,
+                     suggested_new_rect.top,
+                     suggested_new_rect.right - suggested_new_rect.left,
+                     suggested_new_rect.bottom - suggested_new_rect.top,
+                     0);
       }break;
 
       //- rjf: [file drop]

src/raddbg/raddbg_core.c

@@ -5176,6 +5176,19 @@ rd_window_frame(void)
       cfg_node_release(rd_state->cfg, cfg_node_child_from_string(window, str8_lit("maximized")));
     }
 
+    //- rjf: DPI changes -> xform font size / window size
+    F32 dpi = os_dpi_from_window(ws->os);
+    if(dpi != ws->last_dpi)
+    {
+      fnt_reset();
+      F32 current_font_size = rd_font_size();
+      F32 new_font_size = current_font_size * (dpi / ws->last_dpi);
+      new_font_size = Clamp(6.f, new_font_size, 72.f);
+      CFG_Node *font_size_cfg = cfg_node_child_from_string_or_alloc(rd_state->cfg, window, str8_lit("font_size"));
+      cfg_node_new_replacef(rd_state->cfg, font_size_cfg, "%I64u", (U64)new_font_size);
+      ws->last_dpi = dpi;
+    }
+    
     //- rjf: commit position
     Rng2F32 window_rect = os_rect_from_window(ws->os);
     if(!is_fullscreen && !is_maximized && !is_minimized)