/// <summary>
/// Extension method to resolve supplied resource from a resource dictionary.
/// </summary>
/// <typeparam name="T">Expected type of requested resource.</typeparam>
/// <param name="resources">ResourceDictionary from where to resolve resource.</param>
/// <param name="resource">Resource to resolve.</param>
/// <param name="defaultValue">Default value of expected type.</param>
/// <returns>Resolved resource in expected type or supplied default value of expected type.</returns>
/// <remarks>Recursion is used to resolve resources from within other resources.</remarks>
static T GetResource <T>(this ResourceDictionary resources, object?resource, T defaultValue)
{
//Init
var comparer = EqualityComparer <T> .Default;
//Check resource type
switch (resource)
{
case OnPlatform <T> value:
//Get platform specific resource
var platformValue = value.Platforms?.FirstOrDefault(p => p.Platform.Contains(Device.RuntimePlatform))?.Value;
return(resources.GetResource <T>(platformValue, comparer.Equals(value.Default, default(T) ?? defaultValue) ? defaultValue : value.Default ?? defaultValue));
case OnIdiom <T> value:
{
//Get idiom specific resource
return(Device.Idiom switch
{
TargetIdiom.Phone => value.Phone,
TargetIdiom.Tablet => value.Tablet,
TargetIdiom.Desktop => value.Desktop,
TargetIdiom.TV => value.TV,
TargetIdiom.Watch => value.Watch,
_ => comparer.Equals(value.Default, default(T) ?? defaultValue) ? defaultValue : value.Default ?? defaultValue,
});
}
/// <summary>
/// Gets or creates the material resource for the given VertexStructure object.
/// </summary>
internal static MaterialResource GetOrCreateMaterialResource(this ResourceDictionary resourceDict, VertexStructureSurface targetSurface)
{
NamedOrGenericKey materialKey = targetSurface.Material;
NamedOrGenericKey textureKey = targetSurface.TextureKey;
// Get the material if it is already created
if ((!materialKey.IsEmpty) && (resourceDict.ContainsResource(materialKey)))
{
return(resourceDict.GetResource <MaterialResource>(materialKey));
}
// Generate a dynamic material key
if (materialKey.IsEmpty)
{
materialKey = new NamedOrGenericKey(targetSurface.MaterialProperties.GetDynamicResourceKey());
}
// Get the material if it is already created
if (resourceDict.ContainsResource(materialKey))
{
return(resourceDict.GetResource <MaterialResource>(materialKey));
}
if (textureKey.IsEmpty)
{
// Create a default material without any texture
SimpleColoredMaterialResource result = resourceDict.AddResource <SimpleColoredMaterialResource>(materialKey, new SimpleColoredMaterialResource());
result.MaterialDiffuseColor = targetSurface.MaterialProperties.DiffuseColor;
return(result);
}
else
{
// Create texture resource if needed
try
{
if ((!resourceDict.ContainsResource(textureKey)) &&
(!string.IsNullOrEmpty(textureKey.NameKey)))
{
// Try to find and create the texture resource by its name
if (targetSurface.ResourceLink != null)
{
var textureResourceLink = targetSurface.ResourceLink.GetForAnotherFile(textureKey.NameKey);
resourceDict.AddResource <StandardTextureResource>(
textureKey,
new StandardTextureResource(
targetSurface.ResourceLink.GetForAnotherFile(textureKey.NameKey)));
}
else if (targetSurface.ResourceSourceAssembly != null)
{
var textureResourceLink = new AssemblyResourceLink(
targetSurface.ResourceSourceAssembly,
targetSurface.ResourceSourceAssembly.GetName().Name + ".Resources.Textures",
textureKey.NameKey);
if (textureResourceLink.IsValid())
{
resourceDict.AddResource <StandardTextureResource>(
textureKey,
new StandardTextureResource(textureResourceLink));
}
else
{
// Unable to resolve texture
textureKey = NamedOrGenericKey.Empty;
}
}
else
{
// Unable to resolve texture
textureKey = NamedOrGenericKey.Empty;
}
}
}
catch { }
// Create a default textured material
if (!textureKey.IsEmpty)
{
SimpleColoredMaterialResource result = resourceDict.AddResource <SimpleColoredMaterialResource>(
materialKey,
new SimpleColoredMaterialResource(textureKey));
result.MaterialDiffuseColor = targetSurface.MaterialProperties.DiffuseColor;
return(result);
}
else
{
SimpleColoredMaterialResource result = resourceDict.AddResource <SimpleColoredMaterialResource>(
materialKey,
new SimpleColoredMaterialResource());
result.MaterialDiffuseColor = targetSurface.MaterialProperties.DiffuseColor;
return(result);
}
}
}
