[ui] Add FloatImage component

meshroom/ui/qml/Viewer/FloatImage.qml

@@ -0,0 +1,45 @@
+import QtQuick 2.11
+import Utils 1.0
+
+import AliceVision 1.0 as AliceVision
+
+/**
+ * FloatImage displays an Image with gamma / offset / channel controls
+ * Requires QtAliceVision plugin.
+ */
+
+AliceVision.FloatImageViewer {
+    id: root
+
+    width: textureSize.width
+    height: textureSize.height
+    visible: (status === Image.Ready)
+
+    // paintedWidth / paintedHeight / status for compatibility with standard Image
+    property int paintedWidth: textureSize.width
+    property int paintedHeight: textureSize.height
+    property var status: {
+        if(root.loading)
+            return Image.Loading;
+        else if((root.source === "") ||
+                (root.sourceSize.height <= 0) ||
+                (root.sourceSize.height <= 0))
+            return Image.Null;
+        return Image.Ready;
+    }
+
+    property string channelModeString : "rgba"
+
+    channelMode: {
+        switch(channelModeString)
+        {
+            case "rgb": return AliceVision.FloatImageViewer.EChannelMode.RGB
+            case "r": return AliceVision.FloatImageViewer.EChannelMode.R
+            case "g": return AliceVision.FloatImageViewer.EChannelMode.G
+            case "b": return AliceVision.FloatImageViewer.EChannelMode.B
+            case "a": return AliceVision.FloatImageViewer.EChannelMode.A
+            default: return AliceVision.FloatImageViewer.EChannelMode.RGBA
+        }
+    }
+    clearBeforeLoad: true
+}