[gegl] tests: add a test-case for contrast-curve

[Téo Mazars <teom src gnome org>]

commit 1814716afbceb43e813b2726c135cd4ff8f591a7
Author: Téo Mazars <teo mazars ensimag fr>
Date:   Thu Oct 24 16:47:14 2013 +0200

    tests: add a test-case for contrast-curve

 tests/compositions/Makefile.am                  |    1 +
 tests/compositions/contrast-curve.xml           |   21 +++++++++++++++++++++
 tests/compositions/reference/contrast-curve.png |  Bin 0 -> 281055 bytes
 3 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/tests/compositions/Makefile.am b/tests/compositions/Makefile.am
index 2ccd48c..ee9817e 100644
--- a/tests/compositions/Makefile.am
+++ b/tests/compositions/Makefile.am
@@ -22,6 +22,7 @@ TESTS = \
   colors.xml                      \
   color-to-alpha.xml              \
   composite-transform.xml         \
+  contrast-curve.xml              \
   edge-laplace.xml                \
   edge-sobel.xml                  \
   fattal02.xml                    \
diff --git a/tests/compositions/contrast-curve.xml b/tests/compositions/contrast-curve.xml
new file mode 100644
index 0000000..ff26745
--- /dev/null
+++ b/tests/compositions/contrast-curve.xml
@@ -0,0 +1,21 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<gegl>
+  <node operation='gegl:contrast-curve'>
+    <params>
+      <param name='sampling-points'>30</param>
+      <param name='curve'>
+       <curve ymin='0.0' ymax='1.0'>
+         <curve-point x='0.0' y='1.0'/>
+         <curve-point x='0.5' y='0.3'/>
+         <curve-point x='1.0' y='0.0'/>
+       </curve>
+      </param>
+    </params>
+  </node>
+  <node operation='gegl:load'>
+    <params>
+      <param name='path'>data/car-stack.png</param>
+    </params>
+  </node>
+</gegl>
+
diff --git a/tests/compositions/reference/contrast-curve.png b/tests/compositions/reference/contrast-curve.png
new file mode 100644
index 0000000..27d3098
Binary files /dev/null and b/tests/compositions/reference/contrast-curve.png differ