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/** OpenGLTexPartitioner.hh 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.
#ifndef FBCOMPOSITOR_OPENGLTEXPARTITIONER_HH
#define FBCOMPOSITOR_OPENGLTEXPARTITIONER_HH
#include "Exceptions.hh"
#include "OpenGLResources.hh"
#include "FbTk/RefCount.hh"
#include <GL/glxew.h>
#include <GL/glx.h>
#include <X11/Xlib.h>
#include <algorithm>
#include <vector>
namespace FbCompositor {
class OpenGLScreen;
//--- CONSTANTS ------------------------------------------------------------
/** North border flag. */
const int BORDER_NORTH = 1 << 0;
/** East border flag. */
const int BORDER_EAST = 1 << 1;
/** South border flag. */
const int BORDER_SOUTH = 1 << 2;
/** West border flag. */
const int BORDER_WEST = 1 << 3;
/** A bitfield with all border flags set. */
const int BORDER_ALL = BORDER_NORTH | BORDER_EAST | BORDER_SOUTH | BORDER_WEST;
//--- SUPPORTING STRUCTURES ------------------------------------------------
/**
* A single 2D texture partition.
*/
struct TexturePart {
OpenGL2DTexturePtr texture; ///< Partition's contents.
unsigned int borders; ///< A bitfield showing borders, adjacent to this partition.
};
//--- TEXTURE PARTITIONER --------------------------------------------------
/**
* A wrapper that automatically splits large textures into manageable (i.e.
* with supported size) parts.
*/
class OpenGL2DTexturePartition {
public:
//--- CONSTRUCTORS AND DESTRUCTORS -------------------------------------
/** Constructor. */
OpenGL2DTexturePartition(const OpenGLScreen &screen, bool swizzle_alpha_to_one);
/** Destructor. */
~OpenGL2DTexturePartition();
//--- ACCESSORS --------------------------------------------------------
/** \returns the partitions of the current texture. */
const std::vector<TexturePart> &partitions() const;
/** \returns the full height of the current texture. */
int fullHeight() const;
/** \returns the full width of the current texture. */
int fullWidth() const;
//--- MUTATORS ---------------------------------------------------------
/** Sets the texture's contents to the given pixmap. */
void setPixmap(Pixmap pixmap, bool manage_pixmap, int width, int height, int depth);
private:
//--- CONSTRUCTORS -----------------------------------------------------
/** Constructor. */
OpenGL2DTexturePartition(const OpenGL2DTexturePartition &other);
/** Assignment operator. */
OpenGL2DTexturePartition &operator=(const OpenGL2DTexturePartition &other);
//--- INTERNALS --------------------------------------------------------
/** Maximum supported texture size. */
int m_max_texture_size;
/** Whether alpha channel should be swizzled to one. */
bool m_swizzle_alpha_to_one;
/** Partitions of the texture. */
std::vector<TexturePart> m_partitions;
/** Pixmap of the texture's contents. */
Pixmap m_pixmap;
/** Full texture height. */
int m_full_height;
/** Full texture width. */
int m_full_width;
/** Current connection to the X server. */
Display *m_display;
/** Screen that manages this texture. */
const OpenGLScreen &m_screen;
};
// Returns the full height of the current texture.
inline int OpenGL2DTexturePartition::fullHeight() const {
return m_full_height;
}
// Returns the full width of the current texture.
inline int OpenGL2DTexturePartition::fullWidth() const {
return m_full_width;
}
// Returns the partitions of the current texture.
inline const std::vector<TexturePart> &OpenGL2DTexturePartition::partitions() const {
return m_partitions;
}
//--- SUPPORTING FUNCTIONS -------------------------------------------------
/** Returns the border bitfield of the given partition. */
unsigned int getBorderBitfield(int unit_width, int unit_height, int x, int y);
/** Space partitioning function. */
std::vector<XRectangle> partitionSpace(int x, int y, int width, int height, int max_partition_size,
int *unit_width_return = 0, int *unit_height_return = 0);
/** Partitions space directly to buffers. */
std::vector<OpenGLBufferPtr> partitionSpaceToBuffers(const OpenGLScreen &screen, int x, int y,
int width, int height);
//--- TYPEDEFS -------------------------------------------------------------
/** OpenGL texture partition smart pointer. */
typedef FbTk::RefCount<OpenGL2DTexturePartition> OpenGL2DTexturePartitionPtr;
}
#endif // FBCOMPOSITOR_OPENGLTEXPARTITIONER_HH
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