/// <summary>
/// Finds the best set of DPI values to use when loading the font for the specified density bucket.
/// </summary>
private static void GetBestScreenDensityMatch(UltravioletContext uv, ScreenDensityBucket bucket, out Single dpiX, out Single dpiY)
{
dpiX = 96f;
dpiY = 96f;
var bestMatchFound = false;
var bestMatchScale = Single.MaxValue;
foreach (var display in uv.GetPlatform().Displays)
{
if (display.DensityBucket == bucket)
{
if (display.DensityScale < bestMatchScale)
{
bestMatchFound = true;
bestMatchScale = display.DensityScale;
dpiX = display.DpiX;
dpiY = display.DpiY;
}
}
}
if (bestMatchFound)
{
return;
}
dpiX = dpiY = ScreenDensityService.GuessDensityFromBucket(bucket);
}
/// <summary>
/// Initializes a new instance of the OpenGLUltravioletDisplay class.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="displayIndex">The SDL2 display index that this object represents.</param>
public SDL2UltravioletDisplay(UltravioletContext uv, Int32 displayIndex)
{
Contract.Require(uv, nameof(uv));
this.uv = uv;
this.displayIndex = displayIndex;
this.displayModes = Enumerable.Range(0, SDL_GetNumDisplayModes(displayIndex))
.Select(modeIndex => CreateDisplayModeFromSDL(displayIndex, modeIndex))
.ToList();
this.name = SDL_GetDisplayName(displayIndex);
SDL_DisplayMode sdlDesktopDisplayMode;
if (SDL_GetDesktopDisplayMode(displayIndex, &sdlDesktopDisplayMode) < 0)
{
throw new SDL2Exception();
}
this.desktopDisplayMode = CreateDisplayModeFromSDL(sdlDesktopDisplayMode);
this.screenRotationService = ScreenRotationService.Create(this);
this.screenDensityService = ScreenDensityService.Create(this);
}
/// <summary>
/// Initializes a new instance of the OpenGLUltravioletDisplay class.
/// </summary>
/// <param name="displayIndex">The SDL2 display index that this object represents.</param>
public OpenGLUltravioletDisplay(Int32 displayIndex)
{
this.displayIndex = displayIndex;
this.displayModes = Enumerable.Range(0, SDL.GetNumDisplayModes(displayIndex))
.Select(modeIndex => CreateDisplayModeFromSDL(displayIndex, modeIndex))
.ToList();
this.name = SDL.GetDisplayName(displayIndex);
SDL_DisplayMode sdlDesktopDisplayMode;
if (SDL.GetDesktopDisplayMode(displayIndex, &sdlDesktopDisplayMode) < 0)
{
throw new SDL2Exception();
}
this.desktopDisplayMode = CreateDisplayModeFromSDL(sdlDesktopDisplayMode);
this.screenRotationService = ScreenRotationService.Create(this);
this.screenDensityService = ScreenDensityService.Create(this);
}
