// Finds any supported graphics mode that can fit requested game frame size;
// returns true if found acceptable mode, sets found_size.
bool try_find_nearest_supported_mode(const Size &base_size, const int scaling_factor, Size &found_size, const int color_depth,
const bool windowed, const bool enable_sideborders, const bool force_letterbox)
{
Size desktop_size;
if (!get_desktop_size_for_mode(desktop_size, windowed))
{
Out::FPrint("Failed to find acceptable supported gfx mode (unable to obtain desktop resolution)");
return false;
}
const Size wanted_size = base_size * scaling_factor;
// Windowed mode
if (windowed)
{
// Do not try to create windowed mode larger than current desktop resolution
if (!wanted_size.ExceedsByAny(desktop_size))
{
found_size = wanted_size;
return true;
}
return false;
}
// Fullscreen mode: always try strictly no borders first, unless they are
// explicitly enabled, so that modes with borders could be tried later
// anyway if "no borders" failed.
bool found = false;
if (!enable_sideborders)
{
// no sideborders
if (!force_letterbox)
// no letterboxing, perfect match only
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, NULL, true, true);
if (!found)
{
// with letterboxing, letterbox only
// try match desktop ratio
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, &desktop_size, true, false);
if (!found)
// disregard desktop ratio
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, NULL, true, false);
}
}
if (!found)
{
// with sideborders
if (!force_letterbox)
{
// no letterbox, sideborders only
// try match desktop ratio
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, &desktop_size, false, true);
if (!found)
// disregard desktop ratio
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, NULL, false, true);
}
if (!found)
{
// with letterboxing, letterbox + sideborders
// try match desktop ratio
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, &desktop_size);
if (!found)
// disregard desktop ratio
found = find_nearest_supported_mode(base_size, scaling_factor, found_size, color_depth, NULL);
}
}
if (!found)
Out::FPrint("Couldn't find acceptable supported gfx mode for game frame %d x %d (%d bit)",
wanted_size.Width, wanted_size.Height, color_depth);
return found;
}
