/// <summary>
/// Packs image buffer into a single buffer. Image buffers are assumed to be 4 bytes per pixel in RGBA format
/// </summary>
/// <param name="buffers">Image buffers to pack</param>
/// <param name="width">Image buffers width</param>
/// <param name="height">Image buffers height</param>
/// <param name="padding">Padding between each packed image</param>
/// <param name="outPackedBuffer">Packed image buffer</param>
/// <param name="outPackedBufferWidth">Packed image buffer's width</param>
/// <param name="outPackedBufferHeight">Packed iamge buffer's height</param>
/// <param name="outPackedRect">Location of each image buffers in the packed buffer</param>
/// <param name="outUVTransform">Translation data from image original buffer to packed buffer</param>
public static void Pack(NativeArray <Color32>[] buffers, int width, int height, int padding, out NativeArray <Color32> outPackedBuffer, out int outPackedBufferWidth, out int outPackedBufferHeight, out RectInt[] outPackedRect, out Vector2Int[] outUVTransform)
{
UnityEngine.Profiling.Profiler.BeginSample("Pack");
// Determine the area that contains data in the buffer
outPackedBuffer = default(NativeArray <Color32>);
try
{
var tightRects = FindTightRectJob.Execute(buffers, width, height);
Pack(tightRects, padding, out outPackedRect, out outPackedBufferWidth, out outPackedBufferHeight);
outUVTransform = new Vector2Int[tightRects.Length];
for (int i = 0; i < outUVTransform.Length; ++i)
{
outUVTransform[i] = new Vector2Int(outPackedRect[i].x - tightRects[i].x, outPackedRect[i].y - tightRects[i].y);
}
outPackedBuffer = new NativeArray <Color32>(outPackedBufferWidth * outPackedBufferHeight, Allocator.Temp);
Blit(outPackedBuffer, outPackedRect, outPackedBufferWidth, buffers, tightRects, width, padding);
}
catch (Exception ex)
{
if (outPackedBuffer.IsCreated)
{
outPackedBuffer.Dispose();
}
throw ex;
}
finally
{
UnityEngine.Profiling.Profiler.EndSample();
}
}
public static unsafe RectInt[] Execute(NativeArray <Color32>[] buffers, int width, int height)
{
var job = new FindTightRectJob();
job.m_Buffers = new NativeArray <IntPtr>(buffers.Length, Allocator.TempJob);
for (int i = 0; i < buffers.Length; ++i)
{
job.m_Buffers[i] = new IntPtr(buffers[i].GetUnsafeReadOnlyPtr());
}
job.m_Output = new NativeArray <RectInt>(buffers.Length, Allocator.Temp);
job.m_Width = width;
job.m_Height = height;
// Ensure all jobs are completed before we return since we don't own the buffers
job.Schedule(buffers.Length, 1).Complete();
var rects = job.m_Output.ToArray();
job.m_Output.Dispose();
return(rects);
}
