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