/// <summary>
/// Caches the current configuration and re-generates the filter effect of each LOD level to avoid
/// generating garbage a each frame.
/// </summary>
public void SetupTechnique()
{
// Sanity checks
if (levelCoCValues == null && levelDownscaleFactors != null)
{
throw new ArgumentOutOfRangeException("You cannot provide downscale factors without CoC values first.");
}
if (levelCoCValues != null && levelDownscaleFactors != null)
{
if (levelCoCValues.Length != levelDownscaleFactors.Length)
{
throw new ArgumentOutOfRangeException("levelCoCValues and levelDownscaleFactors must be arrays of the same size!");
}
}
if (levelCoCValues != null && levelCoCValues.Length == 0)
{
if (levelCoCValues.Length == 0)
{
throw new ArgumentOutOfRangeException("DoF configuration needs at least one blur level!");
}
if (levelCoCValues[levelCoCValues.Length - 1] != 1f)
{
throw new ArgumentOutOfRangeException("Last blurriest level must have a CoC of 1.0!");
}
}
// Default values: 1 original image and 1 blur level
int levelCount = 2;
if (levelCoCValues != null)
{
levelCount = levelCoCValues.Length + 1;
}
CleanupEffects();
cocLevels.Clear();
combineShaderCocLevelValues = new float[levelCount];
// Special case: level 0 is always our original image
cocLevels.Add(new CoCLevelConfig { CoCValue = 0f, downscaleFactor = 0 });
combineShaderCocLevelValues[0] = 0f;
// Add a description for each of the blur levels
for (int i = 1; i < levelCount; i++)
{
var blurEffect = Technique.ToBlurInstance();
blurEffect.Initialize(Context);
CoCLevelConfig lvlConfig = new CoCLevelConfig
{
CoCValue = (levelCoCValues != null) ? levelCoCValues[i - 1] : 1f,
downscaleFactor = (levelDownscaleFactors != null) ? levelDownscaleFactors[i - 1] : 1,
blurEffect = blurEffect
};
cocLevels.Add(lvlConfig);
// Cache shader parameters
combineShaderCocLevelValues[i] = lvlConfig.CoCValue;
}
configurationDirty = false;
}
