public RenderTexture GetChannel(string channelName)
{
PainterChannel channel = null;
if (channels.TryGetValue(channelName, out channel))
{
return(channel.data);
}
return(null);
}
public void WriteChannel(string channelName, RenderTexture channelData, int channelDimension = 3)
{
PainterChannel targetChannel = null;
if (!channels.TryGetValue(channelName, out targetChannel))
{
targetChannel = new PainterChannel();
int dimension = 3;
if (Painter.ChannelDimensions.TryGetValue(channelName, out dimension))
{
targetChannel.dimension = dimension;
}
else
{
targetChannel.dimension = channelDimension;
}
bool blendable;
if (Painter.ChannelBlendable.TryGetValue(channelName, out blendable))
{
targetChannel.blendable = blendable;
}
else
{
targetChannel.blendable = true;
}
channels.Add(channelName, targetChannel);
}
// apply blend here, if necessary
if ((currentPainterLayer != null) && currentPainterLayer.isBlendable && targetChannel.blendable)
{
// figure out if we have a mask or not
RenderTexture maskRT = null;
if (currentPainter.LayerHasMask(currentGenericLayer))
{
maskRT = GetChannel(Painter.Channels.Mask);
}
RenderTexture original = targetChannel.data;
if (original == channelData)
{
Error("Blend-able layers must return a new RenderTarget, they cannot reuse the original");
}
else
{
RenderTexture dest = CreateRenderTexture(original.descriptor);
// blend channelData on top of original
m_LayerBlendingMaterial.SetTexture("_Overlay", channelData);
m_LayerBlendingMaterial.SetFloat("_Opacity", Mathf.Clamp01(currentGenericLayer.opacity));
if (maskRT)
{
m_LayerBlendingMaterial.SetTexture("_Mask", maskRT);
}
else
{
// Is this even cached, or does it build it on demand each time?
// This should really come from defaultTexture for the mask.
m_LayerBlendingMaterial.SetTexture("_Mask", Texture2D.whiteTexture);
}
Graphics.Blit(original, dest, m_LayerBlendingMaterial, (int)currentGenericLayer.blendMode);
// discard original
discardedRenderTextures.Add(original.descriptor, original);
// set channel to new value
targetChannel.data = dest;
// no longer a temp target, remove from the temp target list
currentLayerTempRenderTextures.Remove(dest);
}
}
else
{
// if not the same render texture, discard the old render texture (for potential reuse later)
if ((targetChannel.data != null) && (targetChannel.data != channelData))
{
discardedRenderTextures.Add(targetChannel.data.descriptor, targetChannel.data);
}
// assign the channel
targetChannel.data = channelData;
// new texture is no longer a temp target, so remove from the temp target list
currentLayerTempRenderTextures.Remove(channelData);
}
}
