tomwalters@411: // Copyright 2006-2010, Willem van Engen, Thomas Walters
tomwalters@397: //
tomwalters@397: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@397: // http://www.acousticscale.org/AIMC
tomwalters@397: //
tomwalters@397: // Licensed under the Apache License, Version 2.0 (the "License");
tomwalters@397: // you may not use this file except in compliance with the License.
tomwalters@397: // You may obtain a copy of the License at
tomwalters@397: //
tomwalters@397: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@397: //
tomwalters@397: // Unless required by applicable law or agreed to in writing, software
tomwalters@397: // distributed under the License is distributed on an "AS IS" BASIS,
tomwalters@397: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tomwalters@397: // See the License for the specific language governing permissions and
tomwalters@397: // limitations under the License.
tomwalters@397: 
tomwalters@397: #ifndef __GRAPHICS_OUTPUT_DEVICE_H__
tomwalters@397: #define __GRAPHICS_OUTPUT_DEVICE_H__
tomwalters@397: 
tomwalters@397: #include "Support/Parameters.h"
tomwalters@397: 
tom@399: namespace aimc {
tom@399: 
tomwalters@397: /*!
tomwalters@397:  * \class GraphicsOutputDevice "Output/GraphicsOutputDevice.h"
tomwalters@397:  * \brief General output device class
tomwalters@397:  *
tomwalters@397:  * This class provides basic drawing primitives in a device-independent manner.
tomwalters@397:  * It is structured like the OpenGL interface. Following is an example drawing
tomwalters@397:  * five horizontal lines, with the colour changing between red and blue over
tomwalters@397:  * time.
tomwalters@397:  * \code
tomwalters@397:  *  GraphicsOutputDevice oOutput = static_cast<GraphicsOutputDevice>(new GraphicsOutputDeviceSomething());
tomwalters@397:  *  unsigned int a=0;
tomwalters@397:  *  ...
tomwalters@397:  *  oOutput->Start();
tomwalters@397:  *  while ( bIsRunning ) {
tomwalters@398:  *    // Start a drawing operation
tomwalters@398:  *    oOutput->gGrab();
tomwalters@398:  *    // Draw five horizontal lines
tomwalters@398:  *    for (int y=0; y<5; y++) {
tomwalters@398:  *      // Start a new line
tomwalters@398:  *      oOutput->gBegin();
tomwalters@398:  *      // Give each line it's own colour
tomwalters@398:  *      oOutput->gColor3f( (a%255)/255, 0, 1-(a%255)/255 );
tomwalters@398:  *      // Draw the line
tomwalters@398:  *      oOutput->gVertex2f(0, y);
tomwalters@398:  *      oOutput->gVertex2f(1, y);
tomwalters@398:  *      // End the line
tomwalters@398:  *      oOutput->gEnd();
tomwalters@398:  *    }
tomwalters@398:  *    oOutput->gRelease();
tomwalters@398:  *    Sleep(1);
tomwalters@398:  *    a++;
tomwalters@397:  *  }
tomwalters@397:  *  oOutput->Stop();
tomwalters@397:  * \endcode
tomwalters@397:  *
tomwalters@397:  * This class includes some basic overloading definitions to ease the
tomwalters@397:  * children's implementation. Note that the basic operations that need
tomwalters@397:  * implementation are glVertex3f(x,y,z) and glColor(r,g,b).
tomwalters@397:  */
tomwalters@397: class GraphicsOutputDevice {
tomwalters@397:  public:
tom@399:   GraphicsOutputDevice(Parameters *pParam);
tomwalters@398:   virtual ~GraphicsOutputDevice() { };
tomwalters@397: 
tomwalters@398:   /*! \brief Initialize the module, sets up everything to Start().
tomwalters@398:    *  \return true on success, false on error
tomwalters@398:    *
tomwalters@398:    *   Initialize() needs to be called before any other function.
tomwalters@398:    *
tomwalters@398:    *  This method is called in it's form as displayed here by the GraphicsView,
tomwalters@398:    *  but you may want to setup your own Initialize(...) function with
tomwalters@398:    *  different arguments and call it yourself.
tomwalters@398:    *
tomwalters@398:    *  Thus make sure you do all memory allocations here. They can be cleaned
tomwalters@398:    *  up by the destructor. Because Initialize() may fail, it's not put in
tomwalters@398:    *  the constructor, so it can return a value.
tomwalters@398:    *
tomwalters@398:    *  \sa Module::Initialize()
tomwalters@398:    */
tomwalters@411: 
tomwalters@398:   /*! \overload
tomwalters@398:    *  This function reloads the parameters; make sure to have at least the
tomwalters@398:    *  function with maximum parameters called once.
tomwalters@398:    */
tomwalters@411:   virtual bool Initialize(Parameters *global_parameters) {
tomwalters@411:     global_parameters_ = global_parameters;
tomwalters@411:     return true;
tomwalters@411:   };
tomwalters@397: 
tomwalters@398:   /*! \brief Create a new drawing
tomwalters@398:    *  Run this before any other drawing command.
tomwalters@398:    *  \sa glRelease()
tomwalters@398:    */
tomwalters@398:   virtual void gGrab() = 0;
tomwalters@397: 
tomwalters@398:   //! \brief Start a new vertex group for drawing a line strip
tomwalters@397:   virtual void gBeginLineStrip() = 0;
tomwalters@397:   //! \brief Start a new vertex group for drawing a quad strip
tomwalters@397:   virtual void gBeginQuadStrip() = 0;
tomwalters@397: 
tomwalters@398:   /*! \brief Specify a vertex to draw
tomwalters@398:    *  \param[in] x X-coordinate of the vertex
tomwalters@398:    *  \param[in] y Y-coordinate of the vertex
tomwalters@398:    *  \param[in] z Z-coordinate of the vertex
tomwalters@398:    *  \param[in] r Red component of colour
tomwalters@398:    *  \param[in] g Green component of colour
tomwalters@398:    *  \param[in] b Blue component of colour
tomwalters@398:    *
tomwalters@398:    *  Currently, only lines are implemented.
tomwalters@398:    */
tomwalters@397:   virtual void gVertex3f(float x, float y, float z, float r, float g, float b);
tomwalters@397: 
tomwalters@398:   /*! \overload
tomwalters@398:    *  This will add a vertex with the last specified colour.
tomwalters@398:    */
tomwalters@397: 
tomwalters@398:   virtual void gVertex3f(float x, float y, float z) = 0;
tomwalters@398:   /*! \overload
tomwalters@398:    *  This will add a vertex in the 2d-plane with z=0.
tomwalters@398:    */
tomwalters@397: 
tomwalters@398:   virtual void gVertex2f(float x, float y, float r, float g, float b);
tomwalters@397: 
tomwalters@398:   /*! \overload
tomwalters@398:    *  This will add a vertex in the 2d-plane with z=0 with the last
tomwalters@397:    *  specified colour.
tomwalters@398:    */
tomwalters@398:   virtual void gVertex2f(float x, float y);
tomwalters@397: 
tomwalters@398:   /*! \brief Sets the current colour
tomwalters@398:    *  \param[in] r Red component
tomwalters@398:    *  \param[in] g Green component
tomwalters@398:    *  \param[in] b Blue component
tomwalters@398:    */
tomwalters@398:   virtual void gColor3f(float r, float g, float b) = 0;
tomwalters@397: 
tomwalters@398:   //! \brief End a vertex group
tomwalters@397:   virtual void gEnd() = 0;
tomwalters@397: 
tomwalters@398:   /*! \brief Render a text string
tomwalters@398:    *  \param[in] x X-coordinate of the text's alignment point
tomwalters@398:    *  \param[in] y Y-coordinate of the text's alignment point
tomwalters@398:    *  \param[in] z Z-coordinate of the text's alignment point
tomwalters@398:    *  \param[in] sStr Text to render
tomwalters@398:    *  \param[in] bRotated \c true for vertically rotated text
tomwalters@398:    *
tomwalters@398:    *  Current alignment is horizontal:left and vertical:bottom
tomwalters@398:    *  \todo Allow multiple alignment points
tomwalters@398:    */
tomwalters@398:   virtual void gText3f(float x,
tomwalters@397:                        float y,
tomwalters@397:                        float z,
tomwalters@397:                        const char *sStr,
tomwalters@397:                        bool bRotated = false) = 0;
tomwalters@397: 
tomwalters@398:   /*! \overload
tomwalters@398:    *  This will render a text string in the 2d-plane with z=0.
tomwalters@398:    */
tomwalters@398:   virtual void gText2f(float x,
tomwalters@397:                       float y,
tomwalters@397:                       const char *sStr,
tomwalters@397:                       bool bRight = false);
tomwalters@397: 
tomwalters@398:   /*! \brief Finish drawing
tomwalters@398:    *  Call this when a drawing is finished. It also makes sure that the
tomwalters@398:    *  rendering is actually done.
tomwalters@398:    *  \sa glGrab()
tomwalters@398:    */
tomwalters@398:   virtual void gRelease() = 0;
tomwalters@397: 
tomwalters@398:   /*! \brief Called when animation starts
tomwalters@398:    *
tomwalters@398:    *  You may wonder what Start() and Stop() do here. Some implementations
tomwalters@398:    *  may want to behave differently with respect to updating, if an
tomwalters@398:    *  animation is running or not (e.g. updating).
tomwalters@398:    */
tomwalters@398:   virtual void Start() { m_bRunning = true; }
tomwalters@397: 
tomwalters@398:   //! \brief Called when animation stops
tomwalters@398:   virtual void Stop()  { m_bRunning = false; }
tomwalters@418:   
tomwalters@418:   virtual void Reset(Parameters* global_parameters) = 0;
tomwalters@418:   
tomwalters@397: 
tomwalters@397:  protected:
tomwalters@398:   //! \brief True when animation is running
tomwalters@398:   bool m_bRunning;
tomwalters@398:   //! \brief Parameter store
tomwalters@411:   Parameters *parameters_;
tomwalters@411:   Parameters *global_parameters_;
tomwalters@397: 
tomwalters@398:   //! \brief Pixel Formats
tomwalters@398:   enum PixelFormat {AIM_PIX_FMT_RGB24_32, AIM_PIX_FMT_RGB24_24};
tomwalters@397: };
tom@399: }  // namespace aimc
tomwalters@397: #endif /* __GRAPHICS_OUTPUT_DEVICE__ */