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Set Fixed Scale Factor for VisionOS (#10222)

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Giovanni Petrantoni 2024-07-11 12:56:50 +08:00 • committed by GitHub
parent 9e331d235f
commit a16ff651e8
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GPG key ID: B5690EEEBB952194
2 changed files with 16 additions and 4 deletions
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12
src/video/uikit/SDL_uikitmetalview.m
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@ -79,16 +79,24 @@ SDL_MetalView UIKit_Metal_CreateView(SDL_VideoDevice *_this, SDL_Window *window)
CGFloat scale = 1.0; CGFloat scale = 1.0;
SDL_uikitmetalview *metalview; SDL_uikitmetalview *metalview;
#ifndef SDL_PLATFORM_VISIONOS
if (window->flags & SDL_WINDOW_HIGH_PIXEL_DENSITY) { if (window->flags & SDL_WINDOW_HIGH_PIXEL_DENSITY) {
/* Set the scale to the natural scale factor of the screen - then /* Set the scale to the natural scale factor of the screen - then
* the backing dimensions of the Metal view will match the pixel * the backing dimensions of the Metal view will match the pixel
* dimensions of the screen rather than the dimensions in points * dimensions of the screen rather than the dimensions in points
* yielding high resolution on retine displays. * yielding high resolution on retine displays.
*/ */
#ifndef SDL_PLATFORM_VISIONOS
scale = data.uiwindow.screen.nativeScale; scale = data.uiwindow.screen.nativeScale;
} #else
// VisionOS doesn't use the concept of "nativeScale" like other iOS devices.
// We use a fixed scale factor of 2.0 to achieve better pixel density.
// This is because VisionOS presents a virtual 1280x720 "screen", but we need
// to render at a higher resolution for optimal visual quality.
// TODO: Consider making this configurable or determining it dynamically
// based on the specific visionOS device capabilities.
scale = 2.0;
#endif #endif
}
metalview = [[SDL_uikitmetalview alloc] initWithFrame:data.uiwindow.bounds metalview = [[SDL_uikitmetalview alloc] initWithFrame:data.uiwindow.bounds
scale:scale]; scale:scale];

8
src/video/uikit/SDL_uikitwindow.m
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@ -368,11 +368,15 @@ void UIKit_GetWindowSizeInPixels(SDL_VideoDevice *_this, SDL_Window *window, int
CGSize size = view.bounds.size; CGSize size = view.bounds.size;
CGFloat scale = 1.0; CGFloat scale = 1.0;
#ifndef SDL_PLATFORM_VISIONOS
if (window->flags & SDL_WINDOW_HIGH_PIXEL_DENSITY) { if (window->flags & SDL_WINDOW_HIGH_PIXEL_DENSITY) {
#ifndef SDL_PLATFORM_VISIONOS
scale = windata.uiwindow.screen.nativeScale; scale = windata.uiwindow.screen.nativeScale;
} #else
scale = 2.0;
#endif #endif
}
/* Integer truncation of fractional values matches SDL_uikitmetalview and /* Integer truncation of fractional values matches SDL_uikitmetalview and
* SDL_uikitopenglview. */ * SDL_uikitopenglview. */