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Autodocs
 Libraries:
 bullet.library
  --background--
  CloseEngine
  ObtainInfoA
  OpenEngine
  ReleaseInfoA
  SetInfoA
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Docs » Autodocs » bullet.library » ObtainInfoA

NAME

	ObtainInfoA -- Inquire tagged font and/or glyph metrics
ObtainInfo -- varargs form of ObtainInfoA

SYNOPSIS

	error = ObtainInfoA(engineHandle, tagList)
A0 A1
ULONG ObtainInfoA(struct GlyphEngine *, struct TagItem *);
error = ObtainInfo(engineHandle, firstTag, ...)
ULONG ObtainInfo(struct GlyphEngine *, Tag, ...);

FUNCTION

	This function accepts a tagList whose tag field elements are
valid for inquiry, and whose associated data fields are
pointers to the destination in which to place the requested
data.
Tag items that refer to data indirectly (OT_Indirect is set)
return pointers that may be allocated or cached by the
library. This data must be treated as read-only data. When
the application is done with the data acquired via ObtainInfoA,
it must perform a ReleaseInfoA to allow the library to release
the data.

INPUTS

	engineHandle -- the handle acquired via OpenEngine.
tagList -- a tagList containing OT_ tags valid for inquiry
paired with the destination pointers for the inquiry
results. All destinations are longwords, whether they
are pointers or values, and regardless of whether the
value could fit in a smaller variable.

RESULT

	This function returns a zero success indication, or a non-zero
error code.

EXAMPLE

	    ULONG pointSize;
struct GlyphMap *glyph;
...
if (!ObtainInfo(EngineHandle, OT_Glyph, &glyph, TAG_DONE)) {
...
ReleaseInfo(EngineHandle, OT_Glyph, glyph, TAG_DONE);
}

SEE ALSO

ReleaseInfoA(), <diskfont/diskfonttag.h>, <diskfont/oterrors.h>

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