BUG: GetGlyphOutline() Returns Partial Glyph |
Q87350
3.10 WINDOWS kbprg kbbuglist
The information in this article applies to:
- Microsoft Windows Software Development Kit (SDK) 3.1
SYMPTOMS
In the Microsoft Windows graphical environment, when an application calls the GetGlyphOutline function to retrieve the bitmap for a rotated glyph (the lpmat2 matrix points to a nonidentity rotation matrix) and the glyph is larger than 75 pixels, the returned bitmap contains a partial, nonrotated, glyph.
RESOLUTION
To work around this problem, perform the following five steps:
- Select the font into an appropriate device context (DC).
- Determine the size of the bitmap required to hold the rotated glyph by performing the following three steps:
- Call the GetCharABCWidths() function to determine the (nonrotated) width of the black part of glyph. This information is returned in the abcB member of an ABC data structure.
- Call the GetTextMetrics() function to fill a TEXTMETRICS data structure with information about the font. Use the value of the tmHeight member of the TEXTMETRICS structure as the height.
- Use the angle of rotation to compute the width and height of the rotated glyph based on the information above.
- Create a bitmap of the size calculated in step 2 and select it into a memory DC.
- Create a rotated version of the font by specifying the rotation angle in the lfOrientation member of the LOGFONT data structure and select it into the memory DC.
- Call the TextOut() function to write the desired glyph into the memory DC.
STATUS
Microsoft has confirmed this to be a bug in Windows version 3.1.
Additional query words: buglist3.10 3.10
Keywords : kbSDKWin16
Issue type : kbbug
Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310
Last Reviewed: June 24, 1999 |
