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Windows DPI scaling/highdpi support

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Adds hint "SDL_WINDOWS_DPI_SCALING" which can be set to "1" to
change the SDL coordinate system units to be DPI-scaled points, rather
than pixels everywhere.

This means windows will be appropriately sized, even when created on
high-DPI displays with scaling.

e.g. requesting a 640x480 window from SDL, on a display with 125%
scaling in Windows display settings, will create a window with an
800x600 client area (in pixels).

Setting this to "1" implicitly requests process DPI awareness
(setting SDL_WINDOWS_DPI_AWARENESS is unnecessary),
and forces SDL_WINDOW_ALLOW_HIGHDPI on all windows.
This commit is contained in:
Eric Wasylishen
2022-06-07 02:01:27 -06:00
committed by Sam Lantinga
parent df36f926fc
commit ab81a559f4
16 changed files with 624 additions and 34 deletions
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src/video/windows/SDL_windowsopengl.h
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@@ -71,6 +71,7 @@ extern int WIN_GL_SetupWindow(_THIS, SDL_Window * window);
extern SDL_GLContext WIN_GL_CreateContext(_THIS, SDL_Window * window);
extern int WIN_GL_MakeCurrent(_THIS, SDL_Window * window,
SDL_GLContext context);
extern void WIN_GL_GetDrawableSize(_THIS, SDL_Window *window, int *w, int *h);
extern int WIN_GL_SetSwapInterval(_THIS, int interval);
extern int WIN_GL_GetSwapInterval(_THIS);
extern int WIN_GL_SwapWindow(_THIS, SDL_Window * window);