Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

17 files changed, 1300 insertions, 0 deletions

diff --git a/slideshow/opengl/basicFragmentShader.glsl b/slideshow/opengl/basicFragmentShader.glsl
new file mode 100644
index 0000000000..fe27071a93
--- /dev/null
+++ b/slideshow/opengl/basicFragmentShader.glsl
@@ -0,0 +1,24 @@
+/* -*- 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 120
+
+uniform sampler2D slideTexture;
+varying vec2 v_texturePosition;
+varying vec3 v_normal;
+
+void main() {
+    vec3 lightVector = vec3(0.0, 0.0, 1.0);
+    float light = max(dot(lightVector, v_normal), 0.0);
+    vec4 fragment = texture2D(slideTexture, v_texturePosition);
+    vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
+    gl_FragColor = mix(black, fragment, light);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/basicVertexShader.glsl b/slideshow/opengl/basicVertexShader.glsl
new file mode 100644
index 0000000000..730da36fd6
--- /dev/null
+++ b/slideshow/opengl/basicVertexShader.glsl
@@ -0,0 +1,96 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#version 120
+
+attribute vec3 a_position;
+attribute vec3 a_normal;
+attribute vec2 a_texCoord;
+
+uniform mat4 u_projectionMatrix;
+uniform mat4 u_modelViewMatrix;
+uniform mat4 u_sceneTransformMatrix;
+uniform mat4 u_primitiveTransformMatrix;
+uniform mat4 u_operationsTransformMatrix;
+
+varying vec2 v_texturePosition;
+varying vec3 v_normal;
+
+#if __VERSION__ < 140
+mat4 inverse(mat4 m)
+{
+    float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2], a03 = m[0][3];
+    float a10 = m[1][0], a11 = m[1][1], a12 = m[1][2], a13 = m[1][3];
+    float a20 = m[2][0], a21 = m[2][1], a22 = m[2][2], a23 = m[2][3];
+    float a30 = m[3][0], a31 = m[3][1], a32 = m[3][2], a33 = m[3][3];
+
+    float b00 = a00 * a11 - a01 * a10;
+    float b01 = a00 * a12 - a02 * a10;
+    float b02 = a00 * a13 - a03 * a10;
+    float b03 = a01 * a12 - a02 * a11;
+    float b04 = a01 * a13 - a03 * a11;
+    float b05 = a02 * a13 - a03 * a12;
+    float b06 = a20 * a31 - a21 * a30;
+    float b07 = a20 * a32 - a22 * a30;
+    float b08 = a20 * a33 - a23 * a30;
+    float b09 = a21 * a32 - a22 * a31;
+    float b10 = a21 * a33 - a23 * a31;
+    float b11 = a22 * a33 - a23 * a32;
+
+    float det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
+
+    return mat4(
+        a11 * b11 - a12 * b10 + a13 * b09,
+        a02 * b10 - a01 * b11 - a03 * b09,
+        a31 * b05 - a32 * b04 + a33 * b03,
+        a22 * b04 - a21 * b05 - a23 * b03,
+        a12 * b08 - a10 * b11 - a13 * b07,
+        a00 * b11 - a02 * b08 + a03 * b07,
+        a32 * b02 - a30 * b05 - a33 * b01,
+        a20 * b05 - a22 * b02 + a23 * b01,
+        a10 * b10 - a11 * b08 + a13 * b06,
+        a01 * b08 - a00 * b10 - a03 * b06,
+        a30 * b04 - a31 * b02 + a33 * b00,
+        a21 * b02 - a20 * b04 - a23 * b00,
+        a11 * b07 - a10 * b09 - a12 * b06,
+        a00 * b09 - a01 * b07 + a02 * b06,
+        a31 * b01 - a30 * b03 - a32 * b00,
+        a20 * b03 - a21 * b01 + a22 * b00) / det;
+}
+#endif
+
+void main( void )
+{
+    mat4 modelViewMatrix = u_modelViewMatrix * u_operationsTransformMatrix * u_sceneTransformMatrix * u_primitiveTransformMatrix;
+    mat3 normalMatrix = mat3(transpose(inverse(modelViewMatrix)));
+    gl_Position = u_projectionMatrix * modelViewMatrix * vec4(a_position, 1.0);
+    v_texturePosition = a_texCoord;
+    v_normal = normalize(normalMatrix * a_normal);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/dissolveFragmentShader.glsl b/slideshow/opengl/dissolveFragmentShader.glsl
new file mode 100644
index 0000000000..c0fdbf441e
--- /dev/null
+++ b/slideshow/opengl/dissolveFragmentShader.glsl
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#version 120
+
+uniform sampler2D leavingSlideTexture;
+uniform sampler2D enteringSlideTexture;
+uniform sampler2D permTexture;
+uniform float time;
+varying vec2 v_texturePosition;
+
+float snoise(vec2 P) {
+
+  return texture2D(permTexture, P).r;
+}
+
+void main() {
+     float sn = snoise(10.0*v_texturePosition);
+     if( sn < time)
+         gl_FragColor = texture2D(enteringSlideTexture, v_texturePosition);
+     else
+         gl_FragColor = texture2D(leavingSlideTexture, v_texturePosition);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/fadeBlackFragmentShader.glsl b/slideshow/opengl/fadeBlackFragmentShader.glsl
new file mode 100644
index 0000000000..3d618a3b4b
--- /dev/null
+++ b/slideshow/opengl/fadeBlackFragmentShader.glsl
@@ -0,0 +1,35 @@
+/* -*- 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 120
+
+uniform sampler2D leavingSlideTexture;
+uniform sampler2D enteringSlideTexture;
+uniform float time;
+varying vec2 v_texturePosition;
+
+void main() {
+#ifdef use_white
+    vec4 color = vec4(1.0, 1.0, 1.0, 1.0);
+#else
+    vec4 color = vec4(0.0, 0.0, 0.0, 1.0);
+#endif
+    vec4 texel;
+    float amount;
+    if (time < 0.5) {
+        texel = texture2D(leavingSlideTexture, v_texturePosition);
+        amount = time * 2;
+    } else {
+        texel = texture2D(enteringSlideTexture, v_texturePosition);
+        amount = (1.0 - time) * 2;
+    }
+    gl_FragColor = mix(texel, color, amount);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/fadeFragmentShader.glsl b/slideshow/opengl/fadeFragmentShader.glsl
new file mode 100644
index 0000000000..0751b6ecd9
--- /dev/null
+++ b/slideshow/opengl/fadeFragmentShader.glsl
@@ -0,0 +1,23 @@
+/* -*- 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 120
+
+uniform sampler2D leavingSlideTexture;
+uniform sampler2D enteringSlideTexture;
+uniform float time;
+varying vec2 v_texturePosition;
+
+void main() {
+    vec4 leavingFragment = texture2D(leavingSlideTexture, v_texturePosition);
+    vec4 enteringFragment = texture2D(enteringSlideTexture, v_texturePosition);
+    gl_FragColor = mix(leavingFragment, enteringFragment, time);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/glitterFragmentShader.glsl b/slideshow/opengl/glitterFragmentShader.glsl
new file mode 100644
index 0000000000..71881742c7
--- /dev/null
+++ b/slideshow/opengl/glitterFragmentShader.glsl
@@ -0,0 +1,36 @@
+/* -*- 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 120
+
+#define M_PI 3.1415926535897932384626433832795
+
+uniform sampler2D leavingSlideTexture;
+uniform sampler2D enteringSlideTexture;
+varying vec2 v_texturePosition;
+varying vec3 v_normal;
+
+uniform float time;
+varying float angle;
+
+void main() {
+    vec3 lightVector = vec3(0.0, 0.0, 1.0);
+    float light = dot(lightVector, v_normal);
+
+    vec4 fragment;
+    if (angle < M_PI)
+        fragment = texture2D(leavingSlideTexture, v_texturePosition);
+    else
+        fragment = texture2D(enteringSlideTexture, v_texturePosition);
+
+    vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
+    gl_FragColor = mix(black, fragment, max(light, 0.0));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/glitterVertexShader.glsl b/slideshow/opengl/glitterVertexShader.glsl
new file mode 100644
index 0000000000..00ae568ac6
--- /dev/null
+++ b/slideshow/opengl/glitterVertexShader.glsl
@@ -0,0 +1,128 @@
+/* -*- 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 120
+
+#define M_PI 3.1415926535897932384626433832795
+
+attribute vec3 a_position;
+attribute vec3 a_normal;
+
+uniform mat4 u_projectionMatrix;
+uniform mat4 u_modelViewMatrix;
+uniform mat4 u_sceneTransformMatrix;
+uniform mat4 u_primitiveTransformMatrix;
+uniform mat4 u_operationsTransformMatrix;
+
+varying vec2 v_texturePosition;
+varying vec3 v_normal;
+
+attribute vec3 center;
+uniform float time;
+uniform ivec2 numTiles;
+uniform sampler2D permTexture;
+varying float angle;
+
+#if __VERSION__ < 140
+mat4 inverse(mat4 m)
+{
+    float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2], a03 = m[0][3];
+    float a10 = m[1][0], a11 = m[1][1], a12 = m[1][2], a13 = m[1][3];
+    float a20 = m[2][0], a21 = m[2][1], a22 = m[2][2], a23 = m[2][3];
+    float a30 = m[3][0], a31 = m[3][1], a32 = m[3][2], a33 = m[3][3];
+
+    float b00 = a00 * a11 - a01 * a10;
+    float b01 = a00 * a12 - a02 * a10;
+    float b02 = a00 * a13 - a03 * a10;
+    float b03 = a01 * a12 - a02 * a11;
+    float b04 = a01 * a13 - a03 * a11;
+    float b05 = a02 * a13 - a03 * a12;
+    float b06 = a20 * a31 - a21 * a30;
+    float b07 = a20 * a32 - a22 * a30;
+    float b08 = a20 * a33 - a23 * a30;
+    float b09 = a21 * a32 - a22 * a31;
+    float b10 = a21 * a33 - a23 * a31;
+    float b11 = a22 * a33 - a23 * a32;
+
+    float det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
+
+    return mat4(
+        a11 * b11 - a12 * b10 + a13 * b09,
+        a02 * b10 - a01 * b11 - a03 * b09,
+        a31 * b05 - a32 * b04 + a33 * b03,
+        a22 * b04 - a21 * b05 - a23 * b03,
+        a12 * b08 - a10 * b11 - a13 * b07,
+        a00 * b11 - a02 * b08 + a03 * b07,
+        a32 * b02 - a30 * b05 - a33 * b01,
+        a20 * b05 - a22 * b02 + a23 * b01,
+        a10 * b10 - a11 * b08 + a13 * b06,
+        a01 * b08 - a00 * b10 - a03 * b06,
+        a30 * b04 - a31 * b02 + a33 * b00,
+        a21 * b02 - a20 * b04 - a23 * b00,
+        a11 * b07 - a10 * b09 - a12 * b06,
+        a00 * b09 - a01 * b07 + a02 * b06,
+        a31 * b01 - a30 * b03 - a32 * b00,
+        a20 * b03 - a21 * b01 + a22 * b00) / det;
+}
+#endif
+
+float snoise(vec2 p)
+{
+    return texture2D(permTexture, p).r;
+}
+
+mat4 translationMatrix(vec3 axis)
+{
+    return mat4(1.0,    0.0,    0.0,    0.0,
+                0.0,    1.0,    0.0,    0.0,
+                0.0,    0.0,    1.0,    0.0,
+                axis.x, axis.y, axis.z, 1.0);
+}
+
+mat4 rotationMatrix(vec3 axis, float angle)
+{
+    axis = normalize(axis);
+    float s = sin(angle);
+    float c = cos(angle);
+    float oc = 1.0 - c;
+
+    return mat4(oc * axis.x * axis.x + c,           oc * axis.x * axis.y - axis.z * s,  oc * axis.z * axis.x + axis.y * s,  0.0,
+                oc * axis.x * axis.y + axis.z * s,  oc * axis.y * axis.y + c,           oc * axis.y * axis.z - axis.x * s,  0.0,
+                oc * axis.z * axis.x - axis.y * s,  oc * axis.y * axis.z + axis.x * s,  oc * axis.z * axis.z + c,           0.0,
+                0.0,                                0.0,                                0.0,                                1.0);
+}
+
+void main( void )
+{
+    vec2 pos = (center.xy + 1.0) / 2.0;
+
+    // 0..1 pseudo-random value used to randomize the tile’s start time.
+    float fuzz = snoise(pos);
+
+    float startTime = pos.x * 0.5 + fuzz * 0.25;
+    float endTime = startTime + 0.25;
+
+    // Scale the transition time to minimize the time a tile will stay black.
+    float transitionTime = clamp((time - startTime) / (endTime - startTime), 0.0, 1.0);
+    if (transitionTime < 0.5)
+        transitionTime = transitionTime / 2.0;
+    else
+        transitionTime = (transitionTime / 2.0) + 0.5;
+    angle = transitionTime * M_PI * 2.0;
+
+    mat4 modelViewMatrix = u_modelViewMatrix * u_operationsTransformMatrix * u_sceneTransformMatrix * u_primitiveTransformMatrix;
+    mat4 transformMatrix = translationMatrix(center) * rotationMatrix(vec3(0.0, 1.0, 0.0), angle) * translationMatrix(-center);
+
+    mat3 normalMatrix = mat3(transpose(inverse(transformMatrix)));
+    gl_Position = u_projectionMatrix * modelViewMatrix * transformMatrix * vec4(a_position, 1.0);
+    v_texturePosition = vec2((a_position.x + 1.0) / 2.0, (1.0 - a_position.y) / 2.0);
+    v_normal = normalize(normalMatrix * a_normal);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/honeycombFragmentShader.glsl b/slideshow/opengl/honeycombFragmentShader.glsl
new file mode 100644
index 0000000000..e4ce8e31f9
--- /dev/null
+++ b/slideshow/opengl/honeycombFragmentShader.glsl
@@ -0,0 +1,108 @@
+/* -*- 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 150
+
+in vec2 texturePosition;
+in float fuzz;
+in vec2 v_center;
+in vec3 normal;
+in vec4 shadowCoordinate;
+
+uniform sampler2D slideTexture;
+uniform sampler2D colorShadowTexture;
+uniform sampler2D depthShadowTexture;
+uniform float selectedTexture;
+uniform float time;
+uniform float hexagonSize;
+
+bool isBorder(vec2 point)
+{
+    return point.x < 0.02 || point.x > 0.98 || point.y < 0.02 || point.y > 0.98;
+}
+
+void main()
+{
+    const vec2 samplingPoints[9] = vec2[](
+        vec2(0, 0),
+        vec2(-1, -1),
+        vec2(-1, 0),
+        vec2(-1, 1),
+        vec2(0, 1),
+        vec2(1, 1),
+        vec2(1, 0),
+        vec2(1, -1),
+        vec2(0, -1)
+    );
+
+    vec4 fragment = vec4(texture(slideTexture, texturePosition).rgb, 1.0);
+    vec3 lightVector = vec3(0.0, 0.0, 1.0);
+    float light = max(dot(lightVector, normal), 0.0);
+    if (hexagonSize > 1.0) {
+        // The space in-between hexagons.
+        if (selectedTexture > 0.5)
+            fragment.a = 1.0 - time * 8 + gl_FragCoord.x / 1024.;
+        else
+            fragment.a = time * 8 - 7.3 + gl_FragCoord.x / 1024.;
+    } else {
+        // The hexagons themselves.
+
+        float startTime;
+        float actualTime;
+        if (selectedTexture > 0.5) {
+            // Leaving slide.
+            if (isBorder(v_center))
+                // If the center is “outside” of the canvas, clear it first.
+                startTime = 0.15;
+            else
+                startTime = 0.15 + fuzz * 0.4;
+            float endTime = startTime + 0.05;
+            actualTime = 1.0 - clamp((time - startTime) / (endTime - startTime), 0, 1);
+        } else {
+            // Entering slide.
+            if (isBorder(v_center))
+                // If the center is “outside” of the canvas, clear it first.
+                startTime = 0.85;
+            else
+                startTime = 0.3 + fuzz * 0.4;
+            float endTime = startTime + 0.05;
+            actualTime = clamp((time - startTime) / (endTime - startTime), 0, 1);
+            if (time < 0.8)
+                actualTime *= time / 0.8;
+        }
+
+        if (selectedTexture > 0.5) {
+            // Leaving texture needs to be transparent to see-through.
+            fragment.a = actualTime;
+        } else {
+            // Entering one though, would look weird with transparency.
+            fragment.rgb *= actualTime;
+        }
+    }
+
+    // Compute the shadow.
+    float visibility = 1.0;
+    const float epsilon = 0.0001;
+    if (selectedTexture < 0.5) {
+        float depthShadow = texture(depthShadowTexture, shadowCoordinate.xy).z;
+        float shadowRadius = (1.0 / (shadowCoordinate.z - depthShadow)) * 1000.0;
+        // Only the entering slide.
+        for (int i = 0; i < 9; ++i) {
+            vec2 coordinate = shadowCoordinate.xy + samplingPoints[i] / shadowRadius;
+            if (depthShadow < shadowCoordinate.z - epsilon) {
+                visibility -= 0.05 * texture(colorShadowTexture, coordinate).a;
+            }
+        }
+    }
+
+    vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
+    gl_FragColor = mix(black, fragment, visibility * light);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/honeycombGeometryShader.glsl b/slideshow/opengl/honeycombGeometryShader.glsl
new file mode 100644
index 0000000000..dedc0df975
--- /dev/null
+++ b/slideshow/opengl/honeycombGeometryShader.glsl
@@ -0,0 +1,111 @@
+/* -*- 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 150
+
+layout(triangles) in;
+layout(triangle_strip, max_vertices=27) out;
+
+in mat4 projectionMatrix[];
+in mat4 modelViewMatrix[];
+in mat4 shadowMatrix[];
+
+uniform float hexagonSize;
+uniform sampler2D permTexture;
+
+out vec2 texturePosition;
+out float fuzz;
+out vec2 v_center;
+out vec3 normal;
+out vec4 shadowCoordinate;
+
+const float expandFactor = 0.0318;
+
+float snoise(vec2 p)
+{
+    return texture(permTexture, p).r;
+}
+
+mat4 identityMatrix(void)
+{
+    return mat4(1.0, 0.0, 0.0, 0.0,
+                0.0, 1.0, 0.0, 0.0,
+                0.0, 0.0, 1.0, 0.0,
+                0.0, 0.0, 0.0, 1.0);
+}
+
+mat4 scaleMatrix(vec3 axis)
+{
+    mat4 matrix = identityMatrix();
+    matrix[0][0] = axis.x;
+    matrix[1][1] = axis.y;
+    matrix[2][2] = axis.z;
+    return matrix;
+}
+
+mat4 translationMatrix(vec3 axis)
+{
+    mat4 matrix = identityMatrix();
+    matrix[3] = vec4(axis, 1.0);
+    return matrix;
+}
+
+void emitHexagonVertex(vec3 center, vec2 translation)
+{
+    vec4 pos = vec4(center + hexagonSize * expandFactor * vec3(translation, 0.0), 1.0);
+    gl_Position = projectionMatrix[0] * modelViewMatrix[0] * pos;
+    shadowCoordinate = translationMatrix(vec3(0.5, 0.5, 0.5)) * scaleMatrix(vec3(0.5, 0.5, 0.5)) * shadowMatrix[0] * modelViewMatrix[0] * pos;
+    texturePosition = vec2((pos.x + 1), (1 - pos.y)) / 2;
+    EmitVertex();
+}
+
+void main()
+{
+    const vec2 translateVectors[6] = vec2[](
+        vec2(-3, -2),
+        vec2(0, -4),
+        vec2(3, -2),
+        vec2(3, 2),
+        vec2(0, 4),
+        vec2(-3, 2)
+    );
+
+    vec3 center = gl_in[0].gl_Position.xyz;
+
+    v_center = (1 + center.xy) / 2;
+    fuzz = snoise(center.xy);
+
+    // Draw “walls” to the hexagons.
+    if (hexagonSize < 1.0) {
+        vec3 rearCenter = vec3(center.xy, -0.3);
+        normal = vec3(0.0, 0.0, 0.3);
+        emitHexagonVertex(center, translateVectors[5]);
+        emitHexagonVertex(rearCenter, translateVectors[5]);
+
+        for (int i = 0; i < 6; ++i) {
+            emitHexagonVertex(center, translateVectors[i]);
+            emitHexagonVertex(rearCenter, translateVectors[i]);
+        }
+
+        EndPrimitive();
+    }
+
+    // Draw the main hexagon part.
+    normal = vec3(0.0, 0.0, 1.0);
+    emitHexagonVertex(center, translateVectors[5]);
+
+    for (int i = 0; i < 6; ++i) {
+        emitHexagonVertex(center, translateVectors[i]);
+        emitHexagonVertex(center, vec2(0.0, 0.0));
+    }
+
+    EndPrimitive();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/honeycombVertexShader.glsl b/slideshow/opengl/honeycombVertexShader.glsl
new file mode 100644
index 0000000000..c3484d39ad
--- /dev/null
+++ b/slideshow/opengl/honeycombVertexShader.glsl
@@ -0,0 +1,118 @@
+/* -*- 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 150
+
+#define M_PI 3.1415926535897932384626433832795
+
+in vec3 a_position;
+
+uniform mat4 u_projectionMatrix;
+uniform mat4 u_modelViewMatrix;
+uniform mat4 u_sceneTransformMatrix;
+uniform mat4 u_primitiveTransformMatrix;
+uniform mat4 u_operationsTransformMatrix;
+
+uniform float time;
+uniform float selectedTexture;
+uniform float shadow;
+uniform mat4 orthoProjectionMatrix;
+uniform mat4 orthoViewMatrix;
+
+// Workaround for Intel's Windows driver, to prevent optimisation breakage.
+uniform float zero;
+
+out mat4 projectionMatrix;
+out mat4 modelViewMatrix;
+out mat4 shadowMatrix;
+
+mat4 identityMatrix(void)
+{
+    return mat4(1.0, 0.0, 0.0, 0.0,
+                0.0, 1.0, 0.0, 0.0,
+                0.0, 0.0, 1.0, 0.0,
+                0.0, 0.0, 0.0, 1.0);
+}
+
+mat4 translationMatrix(vec3 axis)
+{
+    return mat4(1.0,    0.0,    0.0,    0.0,
+                0.0,    1.0,    0.0,    0.0,
+                0.0,    0.0,    1.0,    0.0,
+                axis.x, axis.y, axis.z, 1.0);
+}
+
+mat4 scaleMatrix(vec3 axis)
+{
+    return mat4(axis.x, 0.0,    0.0,    0.0,
+                0.0,    axis.y, 0.0,    0.0,
+                0.0,    0.0,    axis.z, 0.0,
+                0.0,    0.0,    0.0,    1.0);
+}
+
+mat4 rotationMatrix(vec3 axis, float angle)
+{
+    axis = normalize(axis);
+    float s = sin(angle);
+    float c = cos(angle);
+    float oc = 1.0 - c;
+
+    return mat4(oc * axis.x * axis.x + c,           oc * axis.x * axis.y - axis.z * s,  oc * axis.z * axis.x + axis.y * s,  0.0,
+                oc * axis.x * axis.y + axis.z * s,  oc * axis.y * axis.y + c,           oc * axis.y * axis.z - axis.x * s,  0.0,
+                oc * axis.z * axis.x - axis.y * s,  oc * axis.y * axis.z + axis.x * s,  oc * axis.z * axis.z + c,           0.0,
+                0.0,                                0.0,                                0.0,                                1.0);
+}
+
+void main( void )
+{
+    mat4 nmodelViewMatrix = u_modelViewMatrix * u_operationsTransformMatrix * u_sceneTransformMatrix * u_primitiveTransformMatrix;
+    mat4 transformMatrix = identityMatrix();
+
+    // TODO: use the aspect ratio of the slide instead.
+    mat4 slideScaleMatrix = scaleMatrix(vec3(0.75, 1, 1));
+    mat4 invertSlideScaleMatrix = scaleMatrix(1.0 / vec3(0.75, 1, 1));
+
+    // These ugly zero comparisons are a workaround for Intel's Windows driver optimisation bug.
+    if (selectedTexture > 0.5) {
+        // Leaving texture
+        if (zero < 1.0)
+            transformMatrix = invertSlideScaleMatrix * transformMatrix;
+        if (zero < 2.0)
+            transformMatrix = rotationMatrix(vec3(0.0, 0.0, 1.0), -pow(time, 3) * M_PI) * transformMatrix;
+        if (zero < 3.0)
+            transformMatrix = slideScaleMatrix * transformMatrix;
+        if (zero < 4.0)
+            transformMatrix = scaleMatrix(vec3(1 + pow(2 * time, 2.1), 1 + pow(2 * time, 2.1), 0)) * transformMatrix;
+        if (zero < 5.0)
+            transformMatrix = translationMatrix(vec3(0, 0, 6 * time)) * transformMatrix;
+    } else {
+        // Entering texture
+        if (zero < 1.0)
+            transformMatrix = invertSlideScaleMatrix * transformMatrix;
+        if (zero < 2.0)
+            transformMatrix = rotationMatrix(vec3(0.0, 0.0, 1.0), pow(0.8 * (time - 1.0), 2.0) * M_PI) * transformMatrix;
+        if (zero < 3.0)
+            transformMatrix = slideScaleMatrix * transformMatrix;
+        if (zero < 4.0)
+            transformMatrix = translationMatrix(vec3(0, 0, 28 * (sqrt(time) - 1))) * transformMatrix;
+    }
+
+    if (shadow < 0.5) {
+        projectionMatrix = u_projectionMatrix;
+        shadowMatrix = orthoProjectionMatrix * orthoViewMatrix;
+    } else {
+        projectionMatrix = orthoProjectionMatrix * orthoViewMatrix;
+        shadowMatrix = mat4(0.0);
+    }
+
+    modelViewMatrix = nmodelViewMatrix * transformMatrix;
+    gl_Position = vec4(a_position, 1.0);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/reflectionFragmentShader.glsl b/slideshow/opengl/reflectionFragmentShader.glsl
new file mode 100644
index 0000000000..c50b6a9d27
--- /dev/null
+++ b/slideshow/opengl/reflectionFragmentShader.glsl
@@ -0,0 +1,34 @@
+/* -*- 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 130
+
+uniform sampler2D slideTexture;
+varying float v_isShadow;
+varying vec2 v_texturePosition;
+varying vec3 v_normal;
+
+void main() {
+    vec3 lightVector = vec3(0.0, 0.0, 1.0);
+    float light = max(dot(lightVector, v_normal), 0.0);
+    vec4 fragment = texture2D(slideTexture, v_texturePosition);
+    vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
+    fragment = mix(black, fragment, light);
+
+    if (v_isShadow > 0.5) {
+        if (v_texturePosition.y > 1.0 - 0.3)
+            gl_FragColor = mix(fragment, vec4(0.0, 0.0, 0.0, 0.0), (1.0 - v_texturePosition.y) / 0.3);
+        else
+            discard;
+    } else {
+        gl_FragColor = fragment;
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/reflectionVertexShader.glsl b/slideshow/opengl/reflectionVertexShader.glsl
new file mode 100644
index 0000000000..6c0c41c751
--- /dev/null
+++ b/slideshow/opengl/reflectionVertexShader.glsl
@@ -0,0 +1,79 @@
+/* -*- 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 130
+
+attribute vec3 a_position;
+attribute vec3 a_normal;
+attribute vec2 a_texCoord;
+
+uniform mat4 u_projectionMatrix;
+uniform mat4 u_modelViewMatrix;
+uniform mat4 u_sceneTransformMatrix;
+uniform mat4 u_primitiveTransformMatrix;
+uniform mat4 u_operationsTransformMatrix;
+
+varying vec2 v_texturePosition;
+varying vec3 v_normal;
+varying float v_isShadow;
+
+#if __VERSION__ < 140
+mat4 inverse(mat4 m)
+{
+    float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2], a03 = m[0][3];
+    float a10 = m[1][0], a11 = m[1][1], a12 = m[1][2], a13 = m[1][3];
+    float a20 = m[2][0], a21 = m[2][1], a22 = m[2][2], a23 = m[2][3];
+    float a30 = m[3][0], a31 = m[3][1], a32 = m[3][2], a33 = m[3][3];
+
+    float b00 = a00 * a11 - a01 * a10;
+    float b01 = a00 * a12 - a02 * a10;
+    float b02 = a00 * a13 - a03 * a10;
+    float b03 = a01 * a12 - a02 * a11;
+    float b04 = a01 * a13 - a03 * a11;
+    float b05 = a02 * a13 - a03 * a12;
+    float b06 = a20 * a31 - a21 * a30;
+    float b07 = a20 * a32 - a22 * a30;
+    float b08 = a20 * a33 - a23 * a30;
+    float b09 = a21 * a32 - a22 * a31;
+    float b10 = a21 * a33 - a23 * a31;
+    float b11 = a22 * a33 - a23 * a32;
+
+    float det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
+
+    return mat4(
+        a11 * b11 - a12 * b10 + a13 * b09,
+        a02 * b10 - a01 * b11 - a03 * b09,
+        a31 * b05 - a32 * b04 + a33 * b03,
+        a22 * b04 - a21 * b05 - a23 * b03,
+        a12 * b08 - a10 * b11 - a13 * b07,
+        a00 * b11 - a02 * b08 + a03 * b07,
+        a32 * b02 - a30 * b05 - a33 * b01,
+        a20 * b05 - a22 * b02 + a23 * b01,
+        a10 * b10 - a11 * b08 + a13 * b06,
+        a01 * b08 - a00 * b10 - a03 * b06,
+        a30 * b04 - a31 * b02 + a33 * b00,
+        a21 * b02 - a20 * b04 - a23 * b00,
+        a11 * b07 - a10 * b09 - a12 * b06,
+        a00 * b09 - a01 * b07 + a02 * b06,
+        a31 * b01 - a30 * b03 - a32 * b00,
+        a20 * b03 - a21 * b01 + a22 * b00) / det;
+}
+#endif
+
+void main( void )
+{
+    mat4 modelViewMatrix = u_modelViewMatrix * u_operationsTransformMatrix * u_sceneTransformMatrix * u_primitiveTransformMatrix;
+    mat3 normalMatrix = mat3(transpose(inverse(modelViewMatrix)));
+    gl_Position = u_projectionMatrix * modelViewMatrix * vec4(a_position, 1.0);
+    v_texturePosition = a_texCoord;
+    v_normal = normalize(normalMatrix * a_normal);
+    v_isShadow = float(gl_VertexID >= 6);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/rippleFragmentShader.glsl b/slideshow/opengl/rippleFragmentShader.glsl
new file mode 100644
index 0000000000..df4bd59279
--- /dev/null
+++ b/slideshow/opengl/rippleFragmentShader.glsl
@@ -0,0 +1,57 @@
+/* -*- 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 120
+
+#define M_PI 3.1415926535897932384626433832795
+
+uniform sampler2D leavingSlideTexture;
+uniform sampler2D enteringSlideTexture;
+uniform float time;
+uniform vec2 center;
+uniform float slideRatio;
+
+varying vec2 v_texturePosition;
+
+// This function returns the distance between two points, taking into account the slide ratio.
+float betterDistance(vec2 p1, vec2 p2)
+{
+    p1.x *= slideRatio;
+    p2.x *= slideRatio;
+    return distance(p1, p2);
+}
+
+void main()
+{
+    const float w = 0.5;
+    const float v = 0.1;
+
+    // Distance from this fragment to the center, in slide coordinates.
+    float dist = betterDistance(center, v_texturePosition);
+
+    // We want the ripple to span all of the slide at the end of the transition.
+    float t = time * (sqrt(2.0) * (slideRatio < 1.0 ? 1.0 / slideRatio : slideRatio));
+
+    // Interpolate the distance to the center in function of the time.
+    float mixed = smoothstep(t*w-v, t*w+v, dist);
+
+    // Get the displacement offset from the current pixel, for fragments that have been touched by the ripple already.
+    vec2 offset = (v_texturePosition - center) * (sin(dist * 64.0 - time * 16.0) + 0.5) / 32.0;
+    vec2 wavyTexCoord = mix(v_texturePosition + offset, v_texturePosition, time);
+
+    // Get the final position we will sample from.
+    vec2 pos = mix(wavyTexCoord, v_texturePosition, mixed);
+
+    // Sample from the textures and mix that together.
+    vec4 leaving = texture2D(leavingSlideTexture, pos);
+    vec4 entering = texture2D(enteringSlideTexture, pos);
+    gl_FragColor = mix(entering, leaving, mixed);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/staticFragmentShader.glsl b/slideshow/opengl/staticFragmentShader.glsl
new file mode 100644
index 0000000000..ab4913de76
--- /dev/null
+++ b/slideshow/opengl/staticFragmentShader.glsl
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#version 120
+
+uniform sampler2D leavingSlideTexture;
+uniform sampler2D enteringSlideTexture;
+uniform sampler2D permTexture;
+uniform float time;
+varying vec2 v_texturePosition;
+
+float snoise(vec2 P) {
+
+  return texture2D(permTexture, P).r;
+}
+
+
+#define PART 0.5
+#define START 0.4
+#define END 0.9
+
+void main() {
+    float sn = snoise(10.0*v_texturePosition+time*0.07);
+    if( time < PART ) {
+        float sn1 = snoise(vec2(time*15.0, 20.0*v_texturePosition.y));
+        float sn2 = snoise(v_texturePosition);
+        if (sn1 > 1.0 - time*time && sn2 < 2.0*time+0.1)
+            gl_FragColor = vec4(sn, sn, sn, 1.0);
+        else if (time > START )
+            gl_FragColor = ((time-START)/(PART - START))*vec4(sn, sn, sn, 1.0) + (1.0 - (time - START)/(PART - START))*texture2D(leavingSlideTexture, v_texturePosition);
+        else
+            gl_FragColor = texture2D(leavingSlideTexture, v_texturePosition);
+    } else if ( time > END ) {
+        gl_FragColor = ((1.0 - time)/(1.0 - END))*vec4(sn, sn, sn, 1.0) + ((time - END)/(1.0 - END))*texture2D(enteringSlideTexture, v_texturePosition);
+    } else 
+        gl_FragColor = vec4(sn, sn, sn, 1.0);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/vortexFragmentShader.glsl b/slideshow/opengl/vortexFragmentShader.glsl
new file mode 100644
index 0000000000..6bcdfc5dab
--- /dev/null
+++ b/slideshow/opengl/vortexFragmentShader.glsl
@@ -0,0 +1,68 @@
+/* -*- 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 150
+
+uniform sampler2D slideTexture;
+uniform sampler2D leavingShadowTexture;
+uniform sampler2D enteringShadowTexture;
+
+in vec2 v_texturePosition;
+in vec3 v_normal;
+in vec4 shadowCoordinate;
+
+void main() {
+    const vec2 samplingPoints[9] = vec2[](
+        vec2(0, 0),
+        vec2(-1, -1),
+        vec2(-1, 0),
+        vec2(-1, 1),
+        vec2(0, 1),
+        vec2(1, 1),
+        vec2(1, 0),
+        vec2(1, -1),
+        vec2(0, -1)
+    );
+
+    // Compute the shadow...
+    float visibility = 1.0;
+    const float epsilon = 0.0001;
+
+    // for the leaving slide,
+    {
+    float depthShadow = texture(leavingShadowTexture, shadowCoordinate.xy).r;
+    float shadowRadius = (1.0 / (shadowCoordinate.z - depthShadow)) * 1000.0;
+    for (int i = 0; i < 9; ++i) {
+        vec2 coordinate = shadowCoordinate.xy + samplingPoints[i] / shadowRadius;
+        if (texture(leavingShadowTexture, coordinate).r < shadowCoordinate.z - epsilon) {
+            visibility -= 0.05;
+        }
+    }
+    }
+
+    // and for entering slide.
+    {
+    float depthShadow = texture(enteringShadowTexture, shadowCoordinate.xy).r;
+    float shadowRadius = (1.0 / (shadowCoordinate.z - depthShadow)) * 1000.0;
+    for (int i = 0; i < 9; ++i) {
+        vec2 coordinate = shadowCoordinate.xy + samplingPoints[i] / shadowRadius;
+        if (texture(enteringShadowTexture, coordinate).r < shadowCoordinate.z - epsilon) {
+            visibility -= 0.05;
+        }
+    }
+    }
+
+    vec3 lightVector = vec3(0.0, 0.0, 1.0);
+    float light = max(dot(lightVector, v_normal), 0.0);
+    vec4 fragment = texture(slideTexture, v_texturePosition);
+    vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
+    gl_FragColor = mix(black, fragment, visibility * light);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/vortexGeometryShader.glsl b/slideshow/opengl/vortexGeometryShader.glsl
new file mode 100644
index 0000000000..5d64a1249c
--- /dev/null
+++ b/slideshow/opengl/vortexGeometryShader.glsl
@@ -0,0 +1,116 @@
+/* -*- 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 150
+
+layout(triangles) in;
+layout(triangle_strip, max_vertices=11) out;
+
+uniform float shadow;
+uniform mat4 u_projectionMatrix;
+uniform mat4 orthoProjectionMatrix;
+uniform mat4 orthoViewMatrix;
+
+in vec2 g_texturePosition[];
+in vec3 g_normal[];
+in mat4 modelViewMatrix[];
+in mat4 transform[];
+in float nTime[];
+in float startTime[];
+in float endTime[];
+
+out vec2 v_texturePosition;
+out vec3 v_normal;
+out vec4 shadowCoordinate;
+
+mat4 identityMatrix(void)
+{
+    return mat4(1.0, 0.0, 0.0, 0.0,
+                0.0, 1.0, 0.0, 0.0,
+                0.0, 0.0, 1.0, 0.0,
+                0.0, 0.0, 0.0, 1.0);
+}
+
+mat4 scaleMatrix(vec3 axis)
+{
+    mat4 matrix = identityMatrix();
+    matrix[0][0] = axis.x;
+    matrix[1][1] = axis.y;
+    matrix[2][2] = axis.z;
+    return matrix;
+}
+
+mat4 translationMatrix(vec3 axis)
+{
+    mat4 matrix = identityMatrix();
+    matrix[3] = vec4(axis, 1.0);
+    return matrix;
+}
+
+void emitHexagonVertex(int index, vec3 translation, float fdsq)
+{
+    mat4 projectionMatrix;
+    mat4 shadowMatrix;
+
+    if (shadow < 0.5) {
+        projectionMatrix = u_projectionMatrix;
+        shadowMatrix = orthoProjectionMatrix * orthoViewMatrix;
+    } else {
+        projectionMatrix = orthoProjectionMatrix * orthoViewMatrix;
+        shadowMatrix = mat4(0.0);
+    }
+
+    mat4 normalMatrix = transpose(inverse(modelViewMatrix[index]));
+
+    vec4 pos = gl_in[index].gl_Position + vec4(translation, 0.0);
+
+    // Apply our transform operations.
+    pos = transform[index] * pos;
+
+    v_normal = normalize(vec3(normalMatrix * transform[index] * vec4(g_normal[index], 0.0)));
+    v_normal.z *= fdsq;
+
+    gl_Position = projectionMatrix * modelViewMatrix[index] * pos;
+    shadowCoordinate = translationMatrix(vec3(0.5, 0.5, 0.5)) * scaleMatrix(vec3(0.5, 0.5, 0.5)) * shadowMatrix * modelViewMatrix[index] * pos;
+    v_texturePosition = g_texturePosition[index];
+    EmitVertex();
+}
+
+void main()
+{
+    const vec4 invalidPosition = vec4(-256.0, -256.0, -256.0, -256.0);
+    const vec3 noTranslation = vec3(0.0, 0.0, 0.0);
+
+    if (gl_in[0].gl_Position == invalidPosition)
+        return;
+
+    // Draw “walls” to the hexagons.
+    if (nTime[0] > startTime[0] && nTime[0] <= endTime[0]) {
+        const vec3 translation = vec3(0.0, 0.0, -0.02);
+
+        emitHexagonVertex(2, noTranslation, 0.3);
+        emitHexagonVertex(2, translation, 0.3);
+
+        for (int i = 0; i < 3; ++i) {
+            emitHexagonVertex(i, noTranslation, 0.3);
+            emitHexagonVertex(i, translation, 0.3);
+        }
+
+        EndPrimitive();
+    }
+
+    // Draw the main quad part.
+    for (int i = 0; i < 3; ++i) {
+        emitHexagonVertex(i, noTranslation, 1.0);
+    }
+
+    EndPrimitive();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/opengl/vortexVertexShader.glsl b/slideshow/opengl/vortexVertexShader.glsl
new file mode 100644
index 0000000000..8d1a67d3d1
--- /dev/null
+++ b/slideshow/opengl/vortexVertexShader.glsl
@@ -0,0 +1,153 @@
+/* -*- 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 150
+
+#define M_PI 3.1415926535897932384626433832795
+
+in vec3 a_position;
+in vec3 a_normal;
+in vec2 a_texCoord;
+in float tileInfo;
+
+uniform mat4 u_modelViewMatrix;
+uniform mat4 u_sceneTransformMatrix;
+uniform mat4 u_primitiveTransformMatrix;
+uniform mat4 u_operationsTransformMatrix;
+
+uniform float time;
+uniform ivec2 numTiles;
+uniform sampler2D permTexture;
+uniform float slide;
+
+// Workaround for Intel's Windows driver, to prevent optimisation breakage.
+uniform float zero;
+
+out vec2 g_texturePosition;
+out vec3 g_normal;
+out mat4 modelViewMatrix;
+out mat4 transform;
+out float nTime;
+out float startTime;
+out float endTime;
+
+float snoise(vec2 p)
+{
+    return texture(permTexture, p).r;
+}
+
+mat4 identityMatrix(void)
+{
+    return mat4(1.0, 0.0, 0.0, 0.0,
+                0.0, 1.0, 0.0, 0.0,
+                0.0, 0.0, 1.0, 0.0,
+                0.0, 0.0, 0.0, 1.0);
+}
+
+mat4 translationMatrix(vec3 axis)
+{
+    mat4 matrix = identityMatrix();
+    matrix[3] = vec4(axis, 1.0);
+    return matrix;
+}
+
+mat4 rotationMatrix(vec3 axis, float angle)
+{
+    axis = normalize(axis);
+    float s = sin(angle);
+    float c = cos(angle);
+    float oc = 1.0 - c;
+
+    return mat4(oc * axis.x * axis.x + c,           oc * axis.x * axis.y - axis.z * s,  oc * axis.z * axis.x + axis.y * s,  0.0,
+                oc * axis.x * axis.y + axis.z * s,  oc * axis.y * axis.y + c,           oc * axis.y * axis.z - axis.x * s,  0.0,
+                oc * axis.z * axis.x - axis.y * s,  oc * axis.y * axis.z + axis.x * s,  oc * axis.z * axis.z + c,           0.0,
+                0.0,                                0.0,                                0.0,                                1.0);
+}
+
+void main( void )
+{
+    // Each tile moves during only half of the transition. The leftmost
+    // tiles start moving at the start and arrive at their end
+    // position around time=0.5, when the tiles there (the rightmost
+    // ones) start moving. (The exact time each tile is moving is
+    // fuzzed a bit to make a more random appearance.)
+
+    // In GLSL 1.20 we don't have any bitwise operators, sigh
+
+    int tileXIndex = int(mod(int(tileInfo), 256));
+    int tileYIndex = int(mod(int(tileInfo) / 256, 256));
+
+    // A semi-random number 0..1, different for neighbouring tiles, to know when they should start moving.
+    float startTimeFuzz = snoise(vec2(float(tileXIndex)/(numTiles.x-1), float(tileYIndex)/(numTiles.y-1)));
+
+    // A semi-random number -1.5..1.5, different for neighbouring tiles, to specify their rotation center.
+    // The additional 0.5 on each side is because we want some tiles to rotate outside.
+    float rotationFuzz = snoise(vec2(float(numTiles.x + tileXIndex)/(numTiles.x-1), float(tileYIndex)/(numTiles.y-1))) * 3.0 - 1.5;
+
+    startTime = float(tileXIndex)/(numTiles.x-1) * 0.2 + startTimeFuzz * 0.2;
+    endTime = min(startTime + 0.7, 1.0);
+
+    bool isLeavingSlide = (slide < 0.5);
+    const vec4 invalidPosition = vec4(-256.0, -256.0, -256.0, -256.0);
+
+    // Don’t display the tile before or after its rotation, depending on the slide.
+    if (!isLeavingSlide)
+    {
+        if (time < max(0.3, startTime))
+        {
+            gl_Position = invalidPosition;
+            return;
+        }
+        nTime = 1.0 - time;
+    }
+    else
+    {
+        if (time > endTime)
+        {
+            gl_Position = invalidPosition;
+            return;
+        }
+        nTime = time;
+    }
+
+    transform = identityMatrix();
+    if (nTime > startTime && nTime <= endTime)
+    {
+        // We are in the rotation part.
+        float rotation = (nTime - startTime) / (endTime - startTime);
+        if (isLeavingSlide)
+            rotation *= -1.0;
+
+        if (rotation < -0.5 || rotation > 0.5) {
+            gl_Position = invalidPosition;
+            return;
+        }
+
+        // Translation vector to set the origin of the rotation.
+        vec3 translationVector = vec3(rotationFuzz, 0.0, 0.0);
+
+        // Compute the actual rotation matrix.
+
+        // Intel's Windows driver gives a wrong matrix when all operations are done at once.
+        if (zero < 1.0)
+            transform = translationMatrix(translationVector) * transform;
+        if (zero < 2.0)
+            transform = rotationMatrix(vec3(0.0, 1.0, 0.0), clamp(rotation, -1.0, 1.0) * M_PI) * transform;
+        if (zero < 3.0)
+            transform = translationMatrix(-translationVector) * transform;
+    }
+
+    modelViewMatrix = u_modelViewMatrix * u_operationsTransformMatrix * u_sceneTransformMatrix * u_primitiveTransformMatrix;
+    gl_Position = vec4(a_position, 1.0);
+
+    g_texturePosition = a_texCoord;
+    g_normal = a_normal;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */