texture*D in GLSL is deprecated and not available in core contexts

Change-Id: Ia5da0899d73aea22fe7bae735e57e30dcd37b254

chart2/opengl/commonFragmentShader.glsl

@@ -10,10 +10,11 @@
 #version 150 core
 
 in vec4 fragmentColor;
+out vec4 actualColor;
 
 void main()
 {
-    gl_FragColor = fragmentColor;
+    actualColor = fragmentColor;
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

chart2/opengl/screenTextFragmentShader.glsl

@@ -12,10 +12,12 @@
 in vec2 vTexCoord;
 uniform sampler2D TextTex;
 uniform vec4 textColor;
+out vec4 actualColor;
+
 void main()
 {
-    vec3 color = texture2D(TextTex, vTexCoord).rgb;
-    gl_FragColor = vec4(textColor.rgb, 1.0 - color.r);
+    vec3 color = texture(TextTex, vTexCoord).rgb;
+    actualColor = vec4(textColor.rgb, 1.0 - color.r);
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

chart2/opengl/textFragmentShader.glsl

@@ -11,10 +11,13 @@
 
 uniform sampler2D TextTex;
 in vec2 vTexCoord;
+out vec4 actualColor;
+
+
 void main()
 {
-    vec3 color = texture2D(TextTex, vTexCoord).rgb;
-    gl_FragColor = vec4(color, 1.0 - color.r);
+    vec3 color = texture(TextTex, vTexCoord).rgb;
+    actualColor = vec4(color, 1.0 - color.r);
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

chart2/opengl/textFragmentShaderBatch.glsl

@@ -17,7 +17,7 @@ in vec3 vTexCoord;
 out vec4 actualColor;
 void main()
 {
-    vec3 color = texture2DArray(texArray, vTexCoord.xyz).rgb;
+    vec3 color = texture(texArray, vTexCoord.xyz).rgb;
     actualColor = vec4(color, 1.0 - color.r);
 }