From 4ef3f34da4eac83188e60d45c122fe429f82610c Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sun, 8 Mar 2026 09:54:40 -0700
Subject: High DPI

---
 src/xplorer.c | 61 +++++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 40 insertions(+), 21 deletions(-)

(limited to 'src')

diff --git a/src/xplorer.c b/src/xplorer.c
index 53badc3..db9cf7d 100644
--- a/src/xplorer.c
+++ b/src/xplorer.c
@@ -11,8 +11,8 @@
 #include <stdlib.h>
 
 static const char* WindowTitle   = "XPLORER";
-static const int   DefaultWidth  = 1440;
-static const int   DefaultHeight = 900;
+static const int   DefaultWidth  = 720;
+static const int   DefaultHeight = 450;
 
 // #define DEBUG_EVENT_LOOP 1
 
@@ -31,6 +31,9 @@ typedef struct State {
 
 uiMouseButton ToUiButton(Uint8 button);
 
+void MouseCoordsToUiCoords(
+    SDL_Window*, float mouse_x, float mouse_y, int* x, int* y);
+
 void CreateUi(State* state) {
   assert(state);
 
@@ -244,8 +247,8 @@ bool Initialize(State* state) {
   assert(state);
 
   if ((state->window = SDL_CreateWindow(
-           WindowTitle, DefaultWidth, DefaultHeight, SDL_WINDOW_RESIZABLE)) ==
-      NULL) {
+           WindowTitle, DefaultWidth, DefaultHeight,
+           SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIGH_PIXEL_DENSITY)) == NULL) {
     return false;
   }
 
@@ -337,32 +340,38 @@ int main(
         }
       }
     } else if (event.type == SDL_EVENT_MOUSE_BUTTON_DOWN) {
+      int x, y;
+      MouseCoordsToUiCoords(
+          state.window, event.button.x, event.button.y, &x, &y);
       const uiInputEvent ui_event = {
-          .type         = uiEventMouseButton,
-          .mouse_button = (uiMouseButtonEvent){
-                                               .button = ToUiButton(event.button.button),
-                                               .state  = uiMouseDown,
-                                               .mouse_position =
-                  (uiPoint){.x = event.button.x, .y = event.button.y}}
+          .type = uiEventMouseButton,
+          .mouse_button =
+              (uiMouseButtonEvent){.button = ToUiButton(event.button.button),
+                                   .state  = uiMouseDown,
+                                   .mouse_position = (uiPoint){x, y}}
       };
       redraw = uiSendEvent(state.frame, &ui_event);
     } else if (event.type == SDL_EVENT_MOUSE_BUTTON_UP) {
+      int x, y;
+      MouseCoordsToUiCoords(
+          state.window, event.button.x, event.button.y, &x, &y);
       const uiInputEvent ev = {
-          .type         = uiEventMouseButton,
-          .mouse_button = (uiMouseButtonEvent){
-                                               .button = ToUiButton(event.button.button),
-                                               .state  = uiMouseUp,
-                                               .mouse_position =
-                  (uiPoint){.x = event.button.x, .y = event.button.y}}
+          .type = uiEventMouseButton,
+          .mouse_button =
+              (uiMouseButtonEvent){.button = ToUiButton(event.button.button),
+                                   .state  = uiMouseUp,
+                                   .mouse_position = (uiPoint){x, y}}
       };
       redraw = uiSendEvent(state.frame, &ev);
     } else if (event.type == SDL_EVENT_MOUSE_WHEEL) {
+      int x, y;
+      MouseCoordsToUiCoords(
+          state.window, event.wheel.mouse_x, event.wheel.mouse_y, &x, &y);
       const uiInputEvent ev = {
-          .type         = uiEventMouseScroll,
-          .mouse_scroll = (uiMouseScrollEvent){
-                                               .scroll_offset  = event.wheel.y,
-                                               .mouse_position = (uiPoint){.x = event.wheel.mouse_x,
-                                          .y = event.wheel.mouse_y}}
+          .type = uiEventMouseScroll,
+          .mouse_scroll =
+              (uiMouseScrollEvent){.scroll_offset  = (int)event.wheel.y,
+                                   .mouse_position = (uiPoint){x, y}}
       };
       redraw = uiSendEvent(state.frame, &ev);
     } else {
@@ -400,3 +409,13 @@ uiMouseButton ToUiButton(Uint8 button) {
   // TODO: Buttons.
   return uiLMB;
 }
+
+void MouseCoordsToUiCoords(
+    SDL_Window* window, float mouse_x, float mouse_y, int* x, int* y) {
+  assert(window);
+  assert(x);
+  assert(y);
+  const float d = SDL_GetWindowPixelDensity(window);
+  *x            = (int)(mouse_x * d);
+  *y            = (int)(mouse_y * d);
+}
-- 
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