5 files changed, 71 insertions, 0 deletions
diff --git a/chart2/Package_opengl.mk b/chart2/Package_opengl.mk
index d96a1cef2b7d..cb8c45670870 100644
--- a/chart2/Package_opengl.mk
+++ b/chart2/Package_opengl.mk
@@ -16,6 +16,8 @@ $(eval $(call gb_Package_add_files,chart2_opengl_shader,$(LIBO_BIN_FOLDER)/openg
 	commonVertexShader.glsl \
 	debugFragmentShader.glsl \
 	debugVertexShader.glsl \
+	pickingVertexShader.glsl \
+	pickingFragmentShader.glsl \
 	symbolFragmentShader.glsl \
 	symbolVertexShader.glsl \
 	textFragmentShader.glsl \
diff --git a/chart2/opengl/pickingFragmentShader.glsl b/chart2/opengl/pickingFragmentShader.glsl
new file mode 100644
index 000000000000..805789e731ed
--- /dev/null
+++ b/chart2/opengl/pickingFragmentShader.glsl
@@ -0,0 +1,17 @@
+/* -*- 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/.
+ */
+
+varying vec4 fragmentColor;
+
+void main()
+{
+    gl_FragColor = fragmentColor;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/chart2/opengl/pickingVertexShader.glsl b/chart2/opengl/pickingVertexShader.glsl
new file mode 100644
index 000000000000..f32e3fd38a91
--- /dev/null
+++ b/chart2/opengl/pickingVertexShader.glsl
@@ -0,0 +1,21 @@
+/* -*- 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/.
+ */
+
+attribute vec3 vPosition;
+uniform mat4 MVP;
+uniform vec4 vColor;
+varying vec4 fragmentColor;
+
+void main()
+{
+    gl_Position =  MVP * vec4(vPosition, 1);
+    fragmentColor = vColor;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/chart2/source/view/inc/GL3DRenderer.hxx b/chart2/source/view/inc/GL3DRenderer.hxx
index 6bfc38373d46..2154f7d9809a 100644
--- a/chart2/source/view/inc/GL3DRenderer.hxx
+++ b/chart2/source/view/inc/GL3DRenderer.hxx
@@ -255,7 +255,27 @@ private:
         void LoadShaders();
     };
 
+    struct PickingShaderResources
+    {
+        // CommonProID
+        GLint m_CommonProID;
+        GLint m_2DVertexID;
+        GLint m_2DColorID;
+        GLint m_MatrixID;
+
+        PickingShaderResources():
+            m_CommonProID(0) {}
+
+        ~PickingShaderResources()
+        {
+            glDeleteProgram(m_CommonProID);
+        }
+
+        void LoadShaders();
+    };
+
     ShaderResources maResources;
+    PickingShaderResources maPickingResources;
 
     // Projection matrix : default 45 degree Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
     glm::mat4 m_Projection;
diff --git a/chart2/source/view/main/GL3DRenderer.cxx b/chart2/source/view/main/GL3DRenderer.cxx
index 6ef1fa78b65f..cbfebedb6e76 100644
--- a/chart2/source/view/main/GL3DRenderer.cxx
+++ b/chart2/source/view/main/GL3DRenderer.cxx
@@ -131,6 +131,14 @@ void OpenGL3DRenderer::ShaderResources::LoadShaders()
     CHECK_GL_ERROR();
 }
 
+void OpenGL3DRenderer::PickingShaderResources::LoadShaders()
+{
+    m_CommonProID = OpenGLHelper::LoadShaders("pickingVertexShader", "pickingFragmentShader");
+    m_MatrixID = glGetUniformLocation(m_CommonProID, "MVP");
+    m_2DVertexID = glGetAttribLocation(m_CommonProID, "vPosition");
+    m_2DColorID = glGetUniformLocation(m_CommonProID, "vColor");
+}
+
 void OpenGL3DRenderer::SetCameraInfo(glm::vec3 pos, glm::vec3 direction, glm::vec3 up)
 {
     m_CameraInfo.cameraPos = pos;
@@ -212,7 +220,10 @@ void OpenGL3DRenderer::init()
 
     m_fViewAngle = 60.0f;
     m_3DProjection = glm::perspective(m_fViewAngle, (float)m_iWidth / (float)m_iHeight, 0.01f, 2000.0f);
+
     maResources.LoadShaders();
+    maPickingResources.LoadShaders();
+
     glGenBuffers(1, &m_TextTexCoordBuf);
     glBindBuffer(GL_ARRAY_BUFFER, m_TextTexCoordBuf);
     glBufferData(GL_ARRAY_BUFFER, sizeof(texCoords), texCoords, GL_STATIC_DRAW);