kc3-lang/freetype/demos/graph/grdevice.h

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• Hash : e49ab25c
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  Date : 2000-05-16T23:44:38
  

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• demos/graph/grdevice.h

• /***************************************************************************
   *
   *  grdevice.h
   *
   *    Graphics device interface
   *
   *  Copyright 1999 - The FreeType Development Team - www.freetype.org
   *
   *
   ***************************************************************************/
  
  #ifndef GRDEVICE_H
  #define GRDEVICE_H
  
  #include "graph.h"
  
  
   /********************************************************************
    *
    * <FuncType>
    *   grDeviceInitFunc
    *
    * <Description>
    *   Simple device initialiser function
    *
    * <Return>
    *   error code. 0 means success
    *
    ********************************************************************/
  
    typedef int  (*grDeviceInitFunc)( void );
  
  
   /********************************************************************
    *
    * <FuncType>
    *   grDeviceDoneFunc
    *
    * <Description>
    *   Simple device finaliser function
    *
    * <Return>
    *   error code. 0 means success
    *
    ********************************************************************/
  
    typedef void (*grDeviceDoneFunc)( void );
  
  
   /********************************************************************
    *
    * <FuncType>
    *   grDeviceInitSurfaceFunc
    *
    * <Description>
    *   initializes a new surface for the device. This may be a window
    *   or a video screen, depending on the device.
    *
    * <Input>
    *   surface  :: handle to target surface
    *
    * <InOut>
    *   bitmap   :: handle to bitmap descriptor
    *
    ********************************************************************/
  
    typedef int  (*grDeviceInitSurfaceFunc)( grSurface*   surface,
                                             grBitmap*    bitmap );
  
  
   /********************************************************************
    *
    * <Struct>
    *   grDevice
    *
    * <Description>
    *   Simple device interface structure
    *
    * <Fields>
    *   surface_objsize :: size in bytes of a single surface object for
    *                      this device.
    *
    *   device_name :: name of device, e.g. "x11", "os2pm", "directx" etc..
    *   init        :: device initialisation routine
    *   done        :: device finalisation
    *   new_surface :: function used to create a new surface (screen or
    *                  window) from the device
    *
    *   num_pixel_modes :: the number of pixel modes supported by this
    *                      device. This value _must_ be set to -1
    *                      default, unless the device provides a
    *                      static set of pixel modes (fullscreen).
    *
    *   pixel_modes     :: an array of pixel modes supported by this
    *                      device
    *
    * <Note>
    *   the fields "num_pixel_modes" and "pixel_modes" must be
    *   set by the "init" function.
    *
    *   This allows windowed devices to "discover" at run-time the
    *   available pixel modes they can provide depending on the
    *   current screen depth.
    *
    ********************************************************************/
  
    struct grDevice_
    {
      int          surface_objsize;
      const char*  device_name;  /* name of device                 */
  
      grDeviceInitFunc        init;
      grDeviceDoneFunc        done;
  
      grDeviceInitSurfaceFunc init_surface;
  
      int                     num_pixel_modes;
      grPixelMode*            pixel_modes;
    };
  
  
    extern grDeviceChain   gr_device_chain[];
    extern int             gr_num_devices;
  
  
  #endif /* GRDEVICE_H */
  

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