New GDI Service Routines

The following table lists all engine functions that are new in the Windows NT 4.0 release, and provides a summary description for each function. The functions are ordered alphabetically. See the reference pages for detailed information.

New Engine Function	Summary Description
EngAcquireSemaphore	Acquires the resource associated with a semaphore for exclusive access by the calling thread.
EngAllocMem	Allocates a block of memory from the system’s paged pool.
EngAllocUserMem	Allocates a block of memory from the address space of the current process.
EngComputeGlyphSet	Computes the glyph set of a code page supported on a device.
EngCreateSemaphore	Creates a semaphore object.
EngDebugBreak	Causes a breakpoint in the current process to occur.
EngDebugPrint	Prints a debug message to the kernel debugger.
EngDeleteSemaphore	Deletes a semaphore object from the system’s resource list.
EngDeviceIoControl	Sends a control code to the video miniport driver, causing the device to perform the requested operation.
EngEnumForms	Enumerates the forms supported by a printer.
EngFindImageProcAddress	Returns the address of a function found within an executable module.
EngFindResource	Determines the location of a resource in a module.
EngFreeMem	Deallocates a block of system memory.
EngFreeModule	Unmaps a file from system memory.
EngFreeUserMem	Deallocates a block of user memory.
EngGetCurrentCodePage	Returns the system’s default OEM and ANSI code pages.
EngGetDriverName	Returns the name of the driver’s DLL.
EngGetFileChangeTime	Returns the specified file’s last write time.
EngGetForm	Gets FORM_INFO_1 details for a form.
EngGetLastError	Gets the last error code logged by GDI for the calling thread.
EngGetPrinter	Retrieves information about a printer.
EngGetPrinterData	Retrieves configuration data for a printer.
EngGetPrinterDataFileName	Retrieves the string name of a printer’s data file.
EngGetProcessHandle	Retrieves a handle to the current client process.
EngGetType1FontList	Retrieves a list of PostScript Type1 font
EngLineTo	Draws a single solid integer-only cosmetic line.
EngLoadImage	Loads an executable image into system memory.
EngLoadModule	Loads an executable module into system memory as read-only.
EngLoadModuleForWrite	Loads an executable module into system memory for writing.
EngMapFontFile	Returns a pointer to the base location of the font data in a font file.
EngMapModule	Returns the address and size of an executable file that was memory-mapped by EngLoadModule.
EngMarkBandingSurface	Marks a surface as a banding surface.
EngMulDiv	Performs a precision-preserved 32-bit multiplication and division.
EngMultiByteToUnicodeN	Converts an ANSI string to a Unicode string.
EngProbeForRead	Probes a structure for read accessibility.
EngProbeForReadAndWrite	Probes a structure for read and write accessibility.
EngQueryLocalTime	Queries the local time.
EngQueryPerformanceCounter	Queries the performance counter.
EngQueryPerformanceFrequency	Queries the frequency of the performance counter.
EngReleaseSemaphore	Releases a semaphore.
EngSecureMem	Secures an address range in memory.
EngSetPrinterData	Sets the configuration data for a printer.
EngSort	Performs a quick sort on a list.
EngUnicodeToMultiByteN	Converts a Unicode string to an ANSI string.
EngUnloadImage	Unloads an image loaded by EngLoadModule.
EngUnmapFontFile	Unmaps a font file from system memory.
EngUnsecureMem	Unlocks an address range that is locked down in memory.
EngWideCharToMultiByte	Converts a wide character string into an ANSI source string using the specified code page.
EngWritePrinter	Provides the spooler with data that needs to be written to a printer.
FLOATOBJ_Xxx, XFORMOBJ_iGetFloatObjXform	Allow graphics drivers to emulate floating point arithmetic. These services must be used on Windows NT systems that do not support kernel-mode floating point operations.
STROBJ_dwGetCodePage	Returns the code page associated with the specified STROBJ.