add shaders for 3.0 glsl version

Change-Id: I52dd49132a9b625e8be51b4d5feb7e567ffa0a6e

chart2/Package_opengl.mk

@@ -30,6 +30,8 @@ $(eval $(call gb_Package_add_files,chart2_opengl_shader,$(LIBO_BIN_FOLDER)/openg
 	renderTextureFragmentShader.glsl \
 	shape3DFragmentShaderBatch.glsl \
 	shape3DVertexShaderBatch.glsl \
+	shape3DFragmentShaderV300.glsl \
+	shape3DVertexShaderV300.glsl \
 ))
 
 # vim: set noet sw=4 ts=4:

chart2/opengl/shape3DFragmentShaderV300.glsl

+/* -*- 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/.
+ */
+#define MAX_LIGHT_NUM 8
+
+varying vec3 positionWorldspace;
+varying vec3 normalCameraspace;
+
+uniform mat4 V;
+uniform vec4 materialAmbient;
+uniform vec4 materialDiffuse;
+uniform vec4 materialSpecular;
+uniform vec4 materialColor;
+uniform int twoSidesLighting;
+uniform float materialShininess;
+uniform vec4 lightColor[MAX_LIGHT_NUM];
+uniform vec4 lightPosWorldspace[MAX_LIGHT_NUM];
+uniform float lightPower[MAX_LIGHT_NUM];
+uniform int lightNum;
+uniform vec4 lightAmbient;
+
+void main()
+{
+    vec3 colorTotal = vec3(0.0f, 0.0f, 0.0f);
+
+    vec3 vertexPositionCameraspace = (V * vec4(positionWorldspace,1)).xyz;
+
+    vec3 MaterialDiffuseColor = materialColor.rgb;
+
+    vec3 normalDirectionCameraspace = normalCameraspace;
+    vec3 eyeDirectionCameraspace = normalize(vec3(0, 0, 0) - vertexPositionCameraspace);
+    float attenuation = 1.0;
+    int i = 0;
+    vec3 lightDirectionCameraspace;
+    vec3 vertexToLightSource;
+
+    vec3 totalAmbient = lightAmbient.rgb *
+                        MaterialDiffuseColor *
+                        materialAmbient.rgb
+                        * 5.0;
+
+    if ((twoSidesLighting == 1) && (!gl_FrontFacing))
+    {
+        normalDirectionCameraspace = -normalDirectionCameraspace;
+    }
+    for (i = 0; i < lightNum; i++)
+    {
+        float  LightPower = lightPower[i];
+        lightDirectionCameraspace = normalize((V * lightPosWorldspace[i]).xyz);
+
+        float cosTheta = clamp(dot(normalDirectionCameraspace,lightDirectionCameraspace), 0,1);
+        vec3 lightDiffuse = LightPower *
+                            attenuation *
+                            lightColor[i].rgb *
+                            MaterialDiffuseColor *
+                            materialDiffuse.rgb *
+                            cosTheta;
+
+        vec3 specularReflection;
+        if (dot(normalDirectionCameraspace, lightDirectionCameraspace) < 0)
+        {
+            specularReflection = vec3(0.0, 0.0, 0.0);
+        }
+        else
+        {
+            vec3 R = reflect(-lightDirectionCameraspace,normalDirectionCameraspace);
+            float cosAlpha = clamp(dot(eyeDirectionCameraspace, R), 0,1);
+            specularReflection = attenuation *
+                                 LightPower *
+                                 lightColor[i].rgb *
+                                 materialSpecular.rgb *
+                                 MaterialDiffuseColor *
+                                 pow(max(0.0, cosAlpha), materialShininess);
+        }
+        colorTotal += lightDiffuse + specularReflection;
+
+    }
+    colorTotal += totalAmbient;
+    gl_FragColor = vec4(colorTotal, 1.0);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

chart2/opengl/shape3DVertexShaderV300.glsl

+/* -*- 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 vertexPositionModelspace;
+attribute vec3 vertexNormalModelspace;
+
+varying vec3 positionWorldspace;
+varying vec3 normalCameraspace;
+
+uniform mat4 P;
+uniform mat4 M;
+uniform mat4 V;
+uniform mat3 normalMatrix;
+
+void main()
+{
+    gl_Position =  P * V * M * vec4(vertexPositionModelspace,1);
+
+    positionWorldspace = (M * vec4(vertexPositionModelspace,1)).xyz;
+
+    normalCameraspace = normalize(mat3(V) * normalMatrix * vertexNormalModelspace);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */