96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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* Graphics driver management functions
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*
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* Copyright 1996 Alexandre Julliard
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*/
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#include "gdi.h"
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#include "heap.h"
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#include "debug.h"
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#include <string.h>
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typedef struct tagGRAPHICS_DRIVER
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{
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struct tagGRAPHICS_DRIVER *next;
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LPSTR name;
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const DC_FUNCTIONS *funcs;
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} GRAPHICS_DRIVER;
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static GRAPHICS_DRIVER *firstDriver = NULL;
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static GRAPHICS_DRIVER *genericDriver = NULL;
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/**********************************************************************
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* DRIVER_RegisterDriver
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*/
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BOOL32 DRIVER_RegisterDriver( LPCSTR name, const DC_FUNCTIONS *funcs )
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{
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GRAPHICS_DRIVER *driver = HeapAlloc( SystemHeap, 0, sizeof(*driver) );
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if (!driver) return FALSE;
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driver->funcs = funcs;
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if (name)
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{
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driver->name = HEAP_strdupA( SystemHeap, 0, name );
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driver->next = firstDriver;
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firstDriver = driver;
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return TRUE;
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}
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/* No name -> it's the generic driver */
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if (genericDriver)
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{
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WARN(driver, " already a generic driver\n" );
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HeapFree( SystemHeap, 0, driver );
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return FALSE;
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}
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driver->name = NULL;
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genericDriver = driver;
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return TRUE;
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}
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/**********************************************************************
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* DRIVER_FindDriver
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*/
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const DC_FUNCTIONS *DRIVER_FindDriver( LPCSTR name )
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{
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GRAPHICS_DRIVER *driver = firstDriver;
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while (driver && name)
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{
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if (!strcasecmp( driver->name, name )) return driver->funcs;
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driver = driver->next;
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}
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return genericDriver ? genericDriver->funcs : NULL;
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}
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/**********************************************************************
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* DRIVER_UnregisterDriver
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*/
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BOOL32 DRIVER_UnregisterDriver( LPCSTR name )
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{
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if (name)
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{
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GRAPHICS_DRIVER **ppDriver = &firstDriver;
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while (*ppDriver)
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{
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if (!strcasecmp( (*ppDriver)->name, name ))
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{
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GRAPHICS_DRIVER *driver = *ppDriver;
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(*ppDriver) = driver->next;
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HeapFree( SystemHeap, 0, driver->name );
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HeapFree( SystemHeap, 0, driver );
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return TRUE;
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}
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ppDriver = &(*ppDriver)->next;
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}
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return FALSE;
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}
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else
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{
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if (!genericDriver) return FALSE;
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HeapFree( SystemHeap, 0, genericDriver );
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genericDriver = NULL;
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return TRUE;
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}
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}
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