ported solid color generator to external shader

app/shaders/shaders.qrc

@@ -10,6 +10,7 @@
         <file>opacity.frag</file>
         <file>opacity.xml</file>
         <file>solid.frag</file>
+        <file>solid.xml</file>
         <file>videoinput.frag</file>
         <file>videoinput.vert</file>
     </qresource>

app/shaders/solid.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<effect id="org.olivevideoeditor.Olive.solidgenerator">
+    <!-- Effect Name -->
+    <name lang="en_US">Solid</name>
+    
+    <!-- Effect Category -->
+    <category lang="en_US">Generator</category>
+
+    <!-- Effect Description -->
+    <description lang="en_US">
+        Generate a solid color.
+    </description>
+    <description lang="en_GB">
+        Generate a solid colour.
+    </description>
+
+    <!-- Parameter: Color Value -->
+    <param id="color_in" type="color">
+        <name lang="en_US">Color</name>
+        <name lang="en_GB">Colour</name>
+        <default>1.0, 0.0, 0.0, 1.0</default>
+    </param>
+
+    <!-- Qt Resource path to fragment shader -->
+    <fragment url=":/shaders/opacity.frag" />
+</effect>