public static string AsHint(this TextureScalingQuality quality)
{
switch (quality)
{
case TextureScalingQuality.Nearest: return("nearest");
case TextureScalingQuality.Linear: return("linear");
case TextureScalingQuality.Anisotropic: return("best");
default: return("");
}
}
/// <summary>
/// Creates a static texture from an existing surface.
/// </summary>
/// <param name="surface">Surface to create texture from</param>
/// <param name="quality">Filtering quality when texture is scaled</param>
/// <remarks>
/// The surface is not modified or disposed by this function.
/// <see cref="TextureAccess" /> is static.
/// The pixel format of the created texture may be different from the
/// pixel format of the surface.
/// </remarks>
public Texture CreateTextureFromSurface(Surface surface,
TextureScalingQuality quality = TextureScalingQuality.Nearest)
{
Try(() =>
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, quality.AsHint()),
"SDL_SetHint");
var texture = SDL_CreateTextureFromSurface(Handle, surface.Handle);
if (texture == IntPtr.Zero)
{
throw new ImaginiException($"Could not create texture: {SDL_GetError()}");
}
return(new Texture(texture, this));
}
public GraphicsTextRenderer(Graphics graphics, SpriteFont font,
TextureScalingQuality quality = TextureScalingQuality.Linear)
{
Font = font;
_graphics = graphics;
foreach (var page in font.Pages)
{
var texture = TextureFactory.FromImage(_graphics, quality,
page.Texture);
texture.BlendMode = BlendMode.AlphaBlend;
page.Texture.Dispose(); // dispose and unset the original image
page.Texture = null;
_pages.Add(texture);
}
}
/// <summary>
/// Creates a texture with the specified dimensions, format and access
/// type.
/// </summary>
/// <param name="w">Width in pixels</param>
/// <param name="h">Height in pixels</param>
/// <param name="quality">Filtering quality when texture is scaled</param>
/// <param name="format">Pixel format</param>
/// <param name="access">Texture access type</param>
public Texture CreateTexture(int w, int h,
TextureScalingQuality quality = TextureScalingQuality.Nearest,
PixelFormat format = PixelFormat.Format_ARGB8888,
TextureAccess access = TextureAccess.Static)
{
Try(() =>
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, quality.AsHint()),
"SDL_SetHint");
var texture = SDL_CreateTexture(Handle, (uint)format, (int)access, w, h);
if (texture == IntPtr.Zero)
{
throw new ImaginiException($"Could not create texture: {SDL_GetError()}");
}
return(new Texture(texture, this));
}
/// <summary>
/// Creates a RGBA8888 surface from the specified Image object.
/// </summary>
public static Texture FromImage <TPixel>(Graphics graphics,
TextureScalingQuality quality, Image <TPixel> image)
where TPixel : struct, IPixel <TPixel>
{
var cloned = image.CloneAs <Rgba32>();
var pixels = cloned.GetPixelSpan();
var bytes = ArrayPool.Rent(pixels.Length * 4);
for (int i = 0; i < pixels.Length; i++)
{
var pixel = pixels[i];
bytes[i * 4] = pixel.A;
bytes[i * 4 + 1] = pixel.B;
bytes[i * 4 + 2] = pixel.G;
bytes[i * 4 + 3] = pixel.R;
}
var texture = graphics.CreateTexture(cloned.Width, cloned.Height,
quality, PixelFormat.Format_RGBA8888);
texture.SetPixels(ref bytes);
ArrayPool.Return(bytes);
return(texture);
}
/// <summary>
/// Creates a RGBA8888 surface by loading a file from the specified stream.
/// </summary>
public static Texture FromStream(Graphics graphics, Stream stream,
TextureScalingQuality quality,
IImageDecoder decoder) =>
FromImage(graphics, quality, Image.Load(stream, decoder));
/// <summary>
/// Creates a RGBA8888 surface by loading a file from the specified path.
/// </summary>
public static Texture FromFile(Graphics graphics, TextureScalingQuality quality,
string path) =>
FromImage(graphics, quality, Image.Load(path));
/// <summary>
/// Creates a text renderer for the specified font.
/// </summary>
public static ITextRenderer CreateTextRenderer(
this Graphics graphics, SpriteFont font,
TextureScalingQuality quality = TextureScalingQuality.Linear) =>
new GraphicsTextRenderer(graphics, font, quality);
