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video: Improve the SDL_WINDOW_ALLOW_HIGHDPI flag documentation

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Extend the SDL_WINDOW_ALLOW_HIGHDPI flag documentation to stress the importance of querying the window drawable size after every window event to avoid rendering issues in a mixed-DPI environment.
This commit is contained in:
Frank Praznik 2022-07-22 12:23:44 -04:00 committed by Ethan Lee
parent 0a1641635d
commit 41b89aec19
1 changed files with 4 additions and 1 deletions
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5
include/SDL_video.h
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@ -697,7 +697,10 @@ extern DECLSPEC Uint32 SDLCALL SDL_GetWindowPixelFormat(SDL_Window * window);
* in pixels may differ from its size in screen coordinates on platforms with
* high-DPI support (e.g. iOS and macOS). Use SDL_GetWindowSize() to query the
* client area's size in screen coordinates, and SDL_GL_GetDrawableSize() or
* SDL_GetRendererOutputSize() to query the drawable size in pixels.
* SDL_GetRendererOutputSize() to query the drawable size in pixels. Note that
* when this flag is set, the drawable size can vary after the window is
* created and should be queried after major window events such as when the
* window is resized or moved between displays.
*
* If the window is set fullscreen, the width and height parameters `w` and
* `h` will not be used. However, invalid size parameters (e.g. too large) may