Refactoring

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.22)
 
 project(
     toucan

README.md

@@ -10,8 +10,8 @@ with image sequences, effects, and transitions.
 The OpenTimelineIO library is used for working with timelines, and the
 OpenImageIO library is used for image I/O and image processing.
 
-Supported Effects
-=================
+Effects
+=======
 
 Patterns: Fill, Checkers, Noise
 
@@ -53,12 +53,18 @@ Transition:
 
 Transition with an invert effect on the clips:
 
-![Transition2](images/Transition2.png)
+![Transition 2](images/Transition2.png)
 
 Transforms; resize, rotate, flip, and flop:
 
 ![Transforms](images/Transforms.png)
 
+Image Graph
+===========
+Image processing graph for a timeline with two tracks:
+
+![Composite Tracks Graph](images/CompositeTracksGraph.svg)
+
 Building
 ========
 

SuperBuild.sh

@@ -2,7 +2,10 @@
 
 set -x
 
-BUILD_TYPE=$1
+BUILD_TYPE=Release
+if [ "$#" -eq 1 ]; then
+    BUILD_TYPE=$1
+fi
 
 cmake -S toucan/cmake/SuperBuild -B superbuild-$BUILD_TYPE -DCMAKE_INSTALL_PREFIX=$PWD/install-$BUILD_TYPE -DCMAKE_PREFIX_PATH=$PWD/install-$BUILD_TYPE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
 cmake --build superbuild-$BUILD_TYPE -j 4 --config $BUILD_TYPE

cmake/SuperBuild/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.22)
 
 project(
     toucan-SuperBuild

images/CompositeTracksGraph.dot

@@ -0,0 +1,11 @@
+digraph CompositeTracks {
+    FillOp [shape=box, label="FillOp: Background color"]
+    ReadOp [shape=box, label="ReadOp: Color_Blue.png"]
+    ReadOp2 [shape=box, label="ReadOp: Counter.2.png"]
+    OverOp [shape=box, label="OverOp"]
+    OverOp2 [shape=box, label="OverOp"]
+    FillOp -> OverOp;
+    ReadOp -> OverOp;
+    OverOp -> OverOp2;
+    ReadOp2 -> OverOp2;
+}