please dont rip this site Prev Next

GetGlyphOutline info  Overview  Group

The GetGlyphOutline function retrieves the outline or bitmap for a character in the TrueType font that is selected into the specified device context.

DWORD GetGlyphOutline(

    HDC hdc,

// handle of device context

    UINT uChar,

// character to query

    UINT uFormat,

// format of data to return

    LPGLYPHMETRICS lpgm,

// address of structure for metrics

    DWORD cbBuffer,

// size of buffer for data

    LPVOID lpvBuffer,

// address of buffer for data

    CONST MAT2 *lpmat2 

// address of transformation matrix structure

   );

Parameters

hdc
Identifies the device context.
uChar
Specifies the character for which data is to be returned.
uFormat
Specifies the format of the data that the function retrieves. Use one of the following values:

Value

Meaning

GGO_BITMAP

The function retrieves the glyph bitmap. For information about memory allocation, see the following Remarks section.

GGO_NATIVE

The function retrieves the curve data points in the rasterizerís native format and uses the fontís design units. When this value is specified, any transformation specified in the lpMatrix parameter is ignored.

GGO_METRICS

The function only retrieves the GLYPHMETRICS structure specified by lpgm. The other buffers are ignored. This value affects the meaning of the functionís return value upon failure; see the following Return Value section.

GGO_GRAY2_BITMAP

The function retrieves a glyph bitmap that contains 5 levels of gray.

GGO_GRAY4_BITMAP

The function retrieves a glyph bitmap that contains 17 levels of gray.

GGO_GRAY8_BITMAP

The function retrieves a glyph bitmap that contains 65 levels of gray.

Note that, for the GGO_GRAYn_BITMAP values, the function retrieves a glyph bitmap that contains n^2+1 (n squared plus one) levels of gray.

lpgm
Points to the GLYPHMETRICS structure describing the placement of the glyph in the character cell.
cbBuffer
Specifies the size of the buffer where the function is to copy information about the outline character. If this value is zero, the function returns the required size of the buffer.
lpvBuffer
Points to the buffer where the function is to copy information about the outline character. If this value is NULL, the function returns the required size of the buffer.
lpmat2
Points to a MAT2 structure specifying a transformation matrix for the character.

Return Values

If GGO_BITMAP, GGO_GRAY2_BITMAP, GGO_GRAY4_BITMAP, GGO_GRAY8_BITMAP, or GGO_NATIVE is specified and the function succeeds, the return value is greater than zero; otherwise, the return value is GDI_ERROR. If one of these flags is specified and the buffer size or address is zero, the return value specifies the required buffer size, in bytes.

If GGO_METRICS is specified and the function fails, the return value is GDI_ERROR. To get extended error information, call GetLastError.

Remarks

The glyph outline returned by the GetGlyphOutline function is for a grid-fitted glyph. (A grid-fitted glyph is a glyph that has been modified so that its bitmapped image conforms as closely as possible to the original design of the glyph.) If an application needs an unmodified glyph outline, it can request the glyph outline for a character in a font whose size is equal to the fontís em unit. The value for a fontís em unit is stored in the otmEMSquare member of the OUTLINETEXTMETRIC structure.

The glyph bitmap returned by GetGlyphOutline when GGO_BITMAP is specified is a doubleword-aligned, row-oriented, monochrome bitmap. When GGO_GRAY2_BITMAP is specified, the bitmap returned is a doubleword-aligned, row-oriented array of bytes whose values range from 0 to 4. When GGO_GRAY4_BITMAP is specified, the bitmap returned is a doubleword-aligned, row-oriented array of bytes whose values range from 0 to 16. When GGO_GRAY8_BITMAP is specified, the bitmap returned is a doubleword-aligned, row-oriented array of bytes whose values range from 0 to 255.

An application can rotate characters retrieved in bitmap format by specifying a 2-by-2 transformation matrix in the lpMatrix parameter.

See Also

FORM_INFO_1, GetOutlineTextMetrics, GLYPHMETRICS, MAT2, OUTLINETEXTMETRIC, POINT

See also:


file: /Techref/os/win/api/win32/func/src/f32_13.htm, 7KB, , updated: 2000/4/7 12:19, local time: 2022/5/20 10:04,
TOP NEW HELP FIND: 
3.239.129.91:LOG IN

 ©2022 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF="http://www.piclist.com/techref/os/win/api/win32/func/src/f32_13.htm"> GetGlyphOutline</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2022 contributors:
o List host: MIT, Site host massmind.org, Top posters @20220520
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .