98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
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/**************************************************************************
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*
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* Copyright (c) 2000-2001 Microsoft Corporation
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*
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* Module Name:
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*
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* Gdiplus initialization
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*
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* Abstract:
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*
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* GDI+ Startup and Shutdown APIs
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*
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**************************************************************************/
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#ifndef _GDIPLUSINIT_H
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#define _GDIPLUSINIT_H
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enum DebugEventLevel
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{
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DebugEventLevelFatal,
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DebugEventLevelWarning
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};
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// Callback function that GDI+ can call, on debug builds, for assertions
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// and warnings.
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typedef VOID (WINAPI *DebugEventProc)(DebugEventLevel level, CHAR *message);
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// Notification functions which the user must call appropriately if
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// "SuppressBackgroundThread" (below) is set.
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typedef Status (WINAPI *NotificationHookProc)(OUT ULONG_PTR *token);
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typedef VOID (WINAPI *NotificationUnhookProc)(ULONG_PTR token);
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// Input structure for GdiplusStartup()
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struct GdiplusStartupInput
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{
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UINT32 GdiplusVersion; // Must be 1
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DebugEventProc DebugEventCallback; // Ignored on free builds
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BOOL SuppressBackgroundThread; // FALSE unless you're prepared to call
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// the hook/unhook functions properly
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BOOL SuppressExternalCodecs; // FALSE unless you want GDI+ only to use
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// its internal image codecs.
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GdiplusStartupInput(
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DebugEventProc debugEventCallback = NULL,
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BOOL suppressBackgroundThread = FALSE,
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BOOL suppressExternalCodecs = FALSE)
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{
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GdiplusVersion = 1;
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DebugEventCallback = debugEventCallback;
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SuppressBackgroundThread = suppressBackgroundThread;
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SuppressExternalCodecs = suppressExternalCodecs;
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}
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};
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// Output structure for GdiplusStartup()
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struct GdiplusStartupOutput
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{
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// The following 2 fields are NULL if SuppressBackgroundThread is FALSE.
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// Otherwise, they are functions which must be called appropriately to
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// replace the background thread.
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//
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// These should be called on the application's main message loop - i.e.
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// a message loop which is active for the lifetime of GDI+.
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// "NotificationHook" should be called before starting the loop,
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// and "NotificationUnhook" should be called after the loop ends.
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NotificationHookProc NotificationHook;
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NotificationUnhookProc NotificationUnhook;
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};
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// GDI+ initialization. Must not be called from DllMain - can cause deadlock.
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//
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// Must be called before GDI+ API's or constructors are used.
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//
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// token - may not be NULL - accepts a token to be passed in the corresponding
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// GdiplusShutdown call.
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// input - may not be NULL
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// output - may be NULL only if input->SuppressBackgroundThread is FALSE.
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extern "C" Status WINAPI GdiplusStartup(
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OUT ULONG_PTR *token,
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const GdiplusStartupInput *input,
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OUT GdiplusStartupOutput *output);
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// GDI+ termination. Must be called before GDI+ is unloaded.
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// Must not be called from DllMain - can cause deadlock.
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//
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// GDI+ API's may not be called after GdiplusShutdown. Pay careful attention
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// to GDI+ object destructors.
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extern "C" VOID WINAPI GdiplusShutdown(ULONG_PTR token);
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#endif
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