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sdl: make window resizable, enable high DPI

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Tested on Linux, MacOS, and Windows.

On MacOS and Windows, we constrain the window's aspect
ratio by adjusting the size when responding to resize
events.

On Linux, I've not found a way to do so, that doesn't
result in fairly stuttery behavior and weird jumpy
behavior of the resize handle, possibly depending
on your window manager. So, black bars are displayed
around the content.
Maybe someone, at some point, finds a way.
(SDL3 seems to have SDL_SetWindowAspectRatio)

When the window is in fullscreen, black bars are
display necessarily, of course, on all systems,
unless the player GUI has exactly the same aspect
ratio as the screen...

Change-Id: I535e6617497611ea57a4c19e08e552f990859cfe
This commit is contained in:
Christian Soffke 2023-08-27 01:17:34 +02:00
parent 79191bf9bb
commit 60f3283f48
5 changed files with 127 additions and 30 deletions
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5
firmware/target/hosted/sdl/lcd-sdl.h
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@ -28,6 +28,11 @@
/* Default display zoom level */
extern SDL_Surface *gui_surface;
extern SDL_Renderer *sdlRenderer;
extern SDL_Window *window;
void sdl_get_window_dimensions(int *w, int *h);
int sdl_update_window(void);
void sdl_window_needs_update(void);
void sdl_update_rect(SDL_Surface *surface, int x_start, int y_start, int width,
int height, int max_x, int max_y,