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simulator: Adjust scaling using keyboard shortcuts

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Press 0-3 to to adjust current zoom level
to 50% (0), 100% (1), 200% (2), or 300% (3).

Press 4 to switch between "best" (linear)
and nearest pixel sampling.

Change-Id: Id10d361659855a0ad9c97e6b341f498f72709ef5
This commit is contained in:
Christian Soffke 2024-12-22 12:50:59 +01:00
parent 759cbf4e5f
commit 7aaa722a5d
3 changed files with 55 additions and 22 deletions
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52
firmware/target/hosted/sdl/lcd-sdl.c
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@ -65,37 +65,45 @@ static inline void sdl_render(void)
#define SNAP_MARGIN 50
int sdl_update_window(void)
{
int w, h;
if (!window_needs_update)
return false;
window_needs_update = false;
#if defined (__APPLE__) || defined(__WIN32) /* Constrain aspect ratio */
sdl_get_window_dimensions(&w, &h);
if (!(SDL_GetWindowFlags(window) & (SDL_WINDOW_MAXIMIZED | SDL_WINDOW_FULLSCREEN)))
{
float aspect_ratio;
int w, h;
sdl_get_window_dimensions(&w, &h);
aspect_ratio = (float) h / w;
int original_height = h;
int original_width = w;
SDL_GetWindowSize(window, &w, &h);
if (w != original_width || h != original_height)
if (display_zoom)
{
if (abs(original_width - w) < SNAP_MARGIN)
{
w = original_width;
h = original_height;
}
else
h = w * aspect_ratio;
SDL_SetWindowSize(window, w, h);
SDL_SetWindowSize(window, display_zoom * w, display_zoom * h);
}
#if defined(__APPLE__) || defined(__WIN32)
else /* Constrain aspect ratio on Windows and MacOS */
{
float aspect_ratio = (float) h / w;
int original_height = h;
int original_width = w;
SDL_GetWindowSize(window, &w, &h);
if (w != original_width || h != original_height)
{
if (abs(original_width - w) < SNAP_MARGIN)
{
w = original_width;
h = original_height;
}
else
h = w * aspect_ratio;
SDL_SetWindowSize(window, w, h);
}
}
}
#endif
}
display_zoom = 0;
sdl_render();
return true;
}