view src/Modules/Output/Graphics/Devices/GraphicsOutputDeviceCairo.h @ 227:73c6d61440ad

- First add of a lot of graphics code from the old version. Not working yet, not even compiling yet.

// Copyright 2007, Thomas Walters
//
// AIM-C: A C++ implementation of the Auditory Image Model
// http://www.acousticscale.org/AIMC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/*!
 * \file
 * \brief Output device for output to a graphics file using cairo
 *
 * \author Tom Walters <[e-mail]> and Willem van Engen <[e-mail]>
 * \date created 2007/09/17
 * \version \$Header: $
 */

#ifndef __GRAPHICS_OUTPUT_DEVICE_CAIRO_H__
#define __GRAPHICS_OUTPUT_DEVICE_CAIRO_H__

#include <stdlib.h>
#include <stdio.h>

#include "cairo.h"

#include "Modules/Output/Graphics/Devices/GraphicsOutputDevice.h"

/*!
 * \class GraphicsOutputDeviceCairo "Output/GraphicsOutputDeviceCairo.h"
 * \brief Output class for output to a graphics file using Cairo
 *
 * This class outputs a graphics operation to file. It only supports 2d though,
 * so the z-component is ignored.
 */
class GraphicsOutputDeviceCairo : public GraphicsOutputDevice
{
 public:
  GraphicsOutputDeviceCairo(AimParameters *pParam);
  virtual ~GraphicsOutputDeviceCairo();

	/*! \brief Initializes this output device, prepares plotting tools.
	 *  \param sDir Directory or filename where to put images, max length is
   *         _MAX_PATH. Must end with slash!!!
	 *  \return true on success, false on failure.
	 *
	 *  sDir can be either a filename, in which case the output will be
	 *  to that file, or a directory, in which case it will be filled
	 *  with 6-digit numbered files. A new file is then created at every
	 *  call to gGrab().
	 *
	 *  As usual, make sure to call this function before any other. If this
	 *  Initialize() failed, you shouldn't try the other functions either.
	 */
	bool Initialize(const char *sDir);
	bool Initialize();
  void gGrab();
  void gBeginLineStrip();
  void gBeginQuadStrip();
	using GraphicsOutputDevice::gVertex3f; // Because we overload it
	void gVertex3f(float x, float y, float z);
	void gColor3f(float r, float g, float b);
  void gEnd();
	void gText3f(float x, float y, float z, const char *sStr, bool bRotated = false);
	void gRelease();
	unsigned char* GetBuffer();
	int GetPixelFormat();
 protected:
  /*! \brief Internal initialisation
   *
   */
  void Init();

	/*! \brief Open the file with given index for output
	 *  \param index File number to open
	 *  \return true on success, false on error
	 *
	 *  This opens a file for output and sets up the plotting library.
	 */
	bool OpenFile(unsigned int index);

	//! \brief Closes a plot output file, if any is open.
	void CloseFile();

	//! \brief Set to true if the input file can be written to
	bool m_bOutputFile;
	//! \brief The Cairo plotter
	int m_iPlotHandle;
	//! \brief Output directory
	char m_sDir[PATH_MAX];
	//! \brief Current file number
	unsigned int m_iFileNumber;
	//! \brief true if this is the first vertex after gBegin()
	bool m_bIsFirstVertex;

	enum VertexType {
		VertexTypeNone,
    VertexTypeLine,
    VertexTypeQuad
	};
	//! \brief The current vertex type
	VertexType m_iVertexType;
	//! \brief Begin vertex of current quad
	float m_aPrevX[3], m_aPrevY[3];
	//! \brief Current number of quad vertices stored
	unsigned int m_iPrevVertexCount;

	//! \brief Whether to invert the colors or not
	bool m_bInvertColors;

  //! \brief Cairo Drawing Surface
  cairo_surface_t *m_cSurface;

  //! \brief Cairo Context
	cairo_t *m_cCr;

  //! \brief Internal store for the input filename
	char m_sFilename[PATH_MAX];

	unsigned int m_iWidth;
	unsigned int m_iHeight;
	bool m_bUseMemoryBuffer;
};

#endif /* __GRAPHICS_OUTPUT_DEVICE_CAIRO_H__ */