shithub: candycrisis

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HiDPI support

--- a/src/SDLU.cpp

+++ b/src/SDLU.cpp

@@ -423,6 +423,29 @@

 static MPoint SDLUi_TranslatePointFromWindowToFrontSurface(MPoint pt)

 {

+	// On macOS, the mouse position is relative to the window's "point size" on Retina screens.

+	int windowPointW = 1;

+	int windowPointH = 1;

+	int windowPixelW = 1;

+	int windowPixelH = 1;

+

+	SDL_GetWindowSize(g_window, &windowPointW, &windowPointH);

+#if SDL_VERSION_ATLEAST(2,26,0)

+	SDL_GetWindowSizeInPixels(g_window, &windowPixelW, &windowPixelH);

+#else

+	// Backwards compat with old versions of SDL

+	windowPixelW = windowPointW;

+	windowPixelH = windowPointH;

+#endif

+

+	if (windowPointW != windowPixelW || windowPointH != windowPixelH)

+	{

+		float dpiScaleX = (float) windowPixelW / (float) windowPointW;		// gGameWindowWidth is in actual pixels

+		float dpiScaleY = (float) windowPixelH / (float) windowPointH;		// gGameWindowHeight is in actual pixels

+		pt.h *= dpiScaleX;

+		pt.v *= dpiScaleY;

+	}

+

     SDL_Rect viewport;

     float scaleX, scaleY;

     SDL_RenderGetViewport(g_renderer, &viewport);

@@ -430,6 +453,12 @@

     pt.h = pt.h / scaleX - viewport.x;

     pt.v = pt.v / scaleY - viewport.y;

+

+    if (widescreen)

+    {

+        pt.h += g_widescreenCrop.x;

+        pt.v += g_widescreenCrop.y;

+    }

     return pt;

 }

binary files a/src/main.cpp b/src/main.cpp differ