/// <summary>
/// Initializes a new instance of the <see cref="DynamicTextureAtlas"/> class.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="width">The width of the texture atlas in pixels.</param>
/// <param name="height">The height of the texture atlas in pixels.</param>
/// <param name="spacing">The number of pixels between cells on the texture atlas.</param>
/// <param name="options">The texture's configuration options.</param>
private DynamicTextureAtlas(UltravioletContext uv, Int32 width, Int32 height, Int32 spacing, TextureOptions options)
: base(uv)
{
Contract.EnsureRange(width > 0, nameof(width));
Contract.EnsureRange(height > 0, nameof(height));
Contract.EnsureRange(spacing >= 0, nameof(spacing));
var isSrgb = (options & TextureOptions.SrgbColor) == TextureOptions.SrgbColor;
var isLinear = (options & TextureOptions.LinearColor) == TextureOptions.LinearColor;
if (isSrgb && isLinear)
{
throw new ArgumentException(UltravioletStrings.TextureCannotHaveMultipleEncodings);
}
var caps = uv.GetGraphics().Capabilities;
var srgbEncoded = (isLinear ? false : (isSrgb ? true : uv.Properties.SrgbDefaultForTexture2D)) && caps.SrgbEncodingEnabled;
var surfOptions = (srgbEncoded ? SurfaceOptions.SrgbColor : SurfaceOptions.LinearColor);
this.IsFlipped = Ultraviolet.GetGraphics().Capabilities.FlippedTextures;
this.Width = width;
this.Height = height;
this.Spacing = spacing;
this.Surface = Surface2D.Create(width, height, surfOptions);
this.Texture = Texture2D.CreateDynamicTexture(width, height, options, this, (dt2d, state) =>
{
((DynamicTextureAtlas)state).Flush();
});
Clear(true);
Invalidate();
}
/// <summary>
/// Creates the output surface for a texture atlas.
/// </summary>
private static Surface2D CreateOutputSurface(TextureAtlasDescription atlasDesc, IEnumerable <TextureAtlasImage> atlasImages,
ContentManager content, IContentProcessorMetadata metadata, Int32 width, Int32 height, Dictionary <String, Rectangle> images)
{
var output = Surface2D.Create(width, height);
foreach (var image in atlasImages)
{
var imageArea = images[image.Name];
using (var imageSurface = content.Load <Surface2D>(image.Path, metadata.AssetDensity, false, metadata.IsLoadedFromSolution))
{
var areaWithoutPadding = new Rectangle(
imageArea.X,
imageArea.Y,
imageArea.Width - atlasDesc.Metadata.Padding,
imageArea.Height - atlasDesc.Metadata.Padding);
imageSurface.Blit(output, areaWithoutPadding);
}
}
return(output);
}
/// <summary> /// Saves the specified surface as a JPEG image. /// </summary> /// <param name="surface">The surface to save.</param> /// <param name="stream">The stream to which to save the surface data.</param> public abstract void SaveAsJpeg(Surface2D surface, Stream stream);
/// <summary> /// Blits the surface onto the specified destination surface at the given location relative /// to the destination's top-left corner, optionally flipping this surface in the process. /// </summary> /// <param name="dst">The destination surface.</param> /// <param name="position">The position at which to blit the surface.</param> /// <param name="direction">The direction in which to flip the surface.</param> public abstract void Blit(Surface2D dst, Point2 position, SurfaceFlipDirection direction);
/// <summary> /// Blits the surface onto the specified destination surface at the given location relative /// to the destination's top-left corner, optionally flipping this surface in the process. /// </summary> /// <param name="dst">The destination surface.</param> /// <param name="position">The position at which to blit the surface.</param> public abstract void Blit(Surface2D dst, Point2 position);
/// <summary> /// Blits the surface onto the specified destination surface. /// </summary> /// <param name="srcRect">The area of this surface that will be copied to the destination surface.</param> /// <param name="dst">The destination surface.</param> /// <param name="dstRect">The area on the destination surface to which this surface will be copied.</param> public abstract void Blit(Rectangle srcRect, Surface2D dst, Rectangle dstRect);
/// <summary> /// Blits the surface onto the specified destination surface. /// </summary> /// <param name="dst">The destination surface.</param> /// <param name="dstRect">The area on the destination surface to which this surface will be copied.</param> public abstract void Blit(Surface2D dst, Rectangle dstRect);
/// <summary> /// Blits the surface onto the specified destination surface. /// </summary> /// <param name="dst">The destination surface.</param> public abstract void Blit(Surface2D dst);
/// <summary> /// Sets the texture's data. /// </summary> /// <param name="surface">The <see cref="Surface2D"/> which contains the data to set.</param> public abstract void SetData(Surface2D surface);
/// <summary> /// Sets the <see cref="Surface2D"/> which represents the specified layer /// of this <see cref="Surface3D"/> instance. /// </summary> /// <param name="layer">The index of the layer to set.</param> /// <param name="surface">The <see cref="Surface2D"/> which represents the /// specified layer of this <see cref="Surface3D"/> instance.</param> /// <param name="transferOwnership">A value indicating whether ownership of the layer /// is transferred to this object. If so, the layer surface will be disposed when this object is disposed.</param> public abstract void SetLayer(Int32 layer, Surface2D surface, Boolean transferOwnership = false);
