Photoshop PSD import (Compositor 1.2.0, part one)

src/IO/PSD/PSDChannelCoder.h

@@ -0,0 +1,13 @@
+#pragma once
+#include <QByteArray>
+#include <QImage>
+#include <vector>
+
+// Photoshop's layer channels: raw and PackBits (Adobe's 2019 specification).
+namespace PSDChannelCoder {
+std::vector<uchar> decode(int compression, int width, int height, const QByteArray &data);
+// Straight planes into premultiplied RGBA, sRGB.
+QImage rgbaImage(int width, int height, const std::vector<uchar> &red, const std::vector<uchar> &green,
+                 const std::vector<uchar> &blue, const std::vector<uchar> &alpha);
+QImage maskImage(int width, int height, const std::vector<uchar> &gray);
+}