add batch render texture shaders

Change-Id: I922d24bc63ed7c1f16318c25da0b6b3401d24b6f

chart2/Package_opengl.mk

@@ -32,6 +32,8 @@ $(eval $(call gb_Package_add_files,chart2_opengl_shader,$(LIBO_BIN_FOLDER)/openg
 	shape3DVertexShaderBatch.glsl \
 	shape3DFragmentShaderV300.glsl \
 	shape3DVertexShaderV300.glsl \
+	textFragmentShaderBatch.glsl \
+	textVertexShaderBatch.glsl \
 ))
 
 # vim: set noet sw=4 ts=4:

chart2/opengl/textFragmentShaderBatch.glsl

@@ -0,0 +1,20 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#version 330 core
+#extension GL_EXT_texture_array : enable
+uniform sampler2DArray texArray;
+in vec3 vTexCoord;
+
+out vec4 actualColor;
+void main()
+{
+	vec3 color = texture2DArray(texArray, vTexCoord.xyz).rgb;
+    actualColor = vec4(color, 1.0 - color.r);
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

chart2/opengl/textVertexShaderBatch.glsl

@@ -0,0 +1,22 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#version 330 core
+in vec3 vPosition;
+in vec3 texCoord;
+
+out vec3 vTexCoord;
+uniform mat4 MVP;
+
+void main()
+{
+    gl_Position =  MVP * vec4(vPosition, 1);
+    vTexCoord = texCoord;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */