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diff --git a/util/fbcompose/OpenGLTexPartitioner.cc b/util/fbcompose/OpenGLTexPartitioner.cc
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+/** OpenGLTexPartitioner.cc file for the fluxbox compositor. */
+
+// Copyright (c) 2011 Gediminas Liktaras (gliktaras at gmail dot com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+
+#include "OpenGLTexPartitioner.hh"
+
+#include "OpenGLScreen.hh"
+
+using namespace FbCompositor;
+
+
+//--- CONSTRUCTORS AND DESTRUCTORS ---------------------------------------------
+
+// Constructor.
+OpenGL2DTexturePartition::OpenGL2DTexturePartition(const OpenGLScreen &screen, bool swizzle_alpha_to_one) :
+    m_screen(screen) {
+
+    m_display = (Display*)(screen.display());
+    m_max_texture_size = screen.maxTextureSize();
+    m_pixmap = None;
+    m_swizzle_alpha_to_one = swizzle_alpha_to_one;
+
+    m_full_height = 0;
+    m_full_width = 0;
+}
+
+// Destructor.
+OpenGL2DTexturePartition::~OpenGL2DTexturePartition() { }
+
+
+//--- MUTATORS -----------------------------------------------------------------
+
+// Sets the texture's contents to the given pixmap.
+void OpenGL2DTexturePartition::setPixmap(Pixmap pixmap, bool manage_pixmap, int width, int height, int depth) {
+    // Handle the pixmap and its GC.
+    if (m_pixmap) {
+        XFreePixmap(m_display, m_pixmap);
+        m_pixmap = None;
+    }
+    if (manage_pixmap) {
+        m_pixmap = pixmap;
+    }
+    GC gc = XCreateGC(m_display, pixmap, 0, NULL);
+
+    // Set partition's dimensions and partition that space.
+    m_full_height = height;
+    m_full_width = width;
+
+    int unit_height, unit_width;
+    std::vector<XRectangle> space_parts = partitionSpace(0, 0, width, height, m_max_texture_size, &unit_width, &unit_height);
+    int total_units = unit_height * unit_width;
+
+    // Adjust number of stored partitions.
+    while ((size_t)(total_units) > m_partitions.size()) {
+        TexturePart partition;
+        partition.borders = 0;
+        partition.texture = new OpenGL2DTexture(m_screen, m_swizzle_alpha_to_one);
+        m_partitions.push_back(partition);
+    }
+    while ((size_t)(total_units) < m_partitions.size()) {
+        m_partitions.pop_back();
+    }
+
+    // Create texture partitions.
+    if (total_units == 1) {
+        m_partitions[0].borders = BORDER_ALL;
+        m_partitions[0].texture->setPixmap(pixmap, false, m_full_width, m_full_height, false);
+    } else {
+        for (int i = 0; i < unit_height; i++) {
+            for (int j = 0; j < unit_width; j++) {
+                int idx = i * unit_width + j;
+
+                // Create partition's pixmap.
+                Pixmap part_pixmap = XCreatePixmap(m_display, m_screen.rootWindow().window(),
+                                                   space_parts[idx].width, space_parts[idx].height, depth);
+                XCopyArea(m_display, pixmap, part_pixmap, gc, space_parts[idx].x, space_parts[idx].y,
+                          space_parts[idx].width, space_parts[idx].height, 0, 0);
+
+                // Set up the partition.
+                m_partitions[idx].borders = getBorderBitfield(unit_width, unit_height, j, i);
+                m_partitions[idx].texture->setPixmap(part_pixmap, true, space_parts[idx].width, space_parts[idx].height, false);
+            }
+        }
+    }
+
+    // Cleanup.
+    XFreeGC(m_display, gc);
+}
+
+
+//--- SUPPORTING FUNCTIONS -------------------------------------------------
+
+// Returns the border bitfield of the given partition.
+unsigned int FbCompositor::getBorderBitfield(int unit_width, int unit_height, int x, int y) {
+    unsigned int borders = 0;
+    borders |= ((y == 0) ? BORDER_NORTH : 0);
+    borders |= ((x == 0) ? BORDER_WEST : 0);
+    borders |= ((y == (unit_height - 1)) ? BORDER_SOUTH : 0);
+    borders |= ((x == (unit_width - 1)) ? BORDER_EAST : 0);
+    return borders;
+}
+
+// Space partitioning function.
+std::vector<XRectangle> FbCompositor::partitionSpace(int x, int y, int width, int height, int max_partition_size,
+                                                     int *unit_width_return, int *unit_height_return) {
+    int unit_height = ((height - 1) / max_partition_size) + 1;
+    int unit_width = ((width - 1) / max_partition_size) + 1;
+
+    std::vector<XRectangle> partitions;
+    for (int i = 0; i < unit_height; i++) {
+        for (int j = 0; j < unit_width; j++) {
+            int part_x = x + j * max_partition_size;
+            int part_y = y + i * max_partition_size;
+            int part_height = ((i == (unit_height - 1)) ? (height % max_partition_size) : max_partition_size);
+            int part_width = ((j == (unit_width - 1)) ? (width % max_partition_size) : max_partition_size);
+
+            XRectangle part = { part_x, part_y, part_width, part_height };
+            partitions.push_back(part);
+        }
+    }
+
+    if (unit_width_return && unit_height_return) {
+        *unit_width_return = unit_width;
+        *unit_height_return = unit_height;
+    }
+
+    return partitions;
+}
+
+// Partitions space directly to buffers.
+std::vector<OpenGLBufferPtr> FbCompositor::partitionSpaceToBuffers(const OpenGLScreen &screen,
+        int x, int y, int width, int height) {
+
+    std::vector<XRectangle> space_part = partitionSpace(x, y, width, height, screen.maxTextureSize());
+    std::vector<OpenGLBufferPtr> buffers;
+
+    for (size_t i = 0; i < space_part.size(); i++) {
+        OpenGLBufferPtr buffer(new OpenGLBuffer(screen, GL_ARRAY_BUFFER));
+        buffer->bufferPosRectangle(screen.rootWindow().width(), screen.rootWindow().height(), space_part[i]);
+        buffers.push_back(buffer);
+    }
+
+    return buffers;
+}