|
Overview |
|
|
|
Group |
|
|
|
Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| gdi32.lib
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| Windows 95: int == 16 bits
|
|
|
SetStretchBltMode
The SetStretchBltMode function sets the bitmap stretching mode in the specified device context.
int SetStretchBltMode(
HDC hdc,
| // handle of device context
| int iStretchMode
| // bitmap stretching mode
| );
|
|
Parameters
hdc
Identifies the device context.
iStretchMode
Specifies the stretching mode. It can be one of the following values:
Value
| Description
| BLACKONWHITE
| Performs a Boolean AND operation using the color values for the eliminated and
existing pixels. If the bitmap is a monochrome bitmap, this mode preserves
black pixels at the expense of white pixels.
| COLORONCOLOR
| Deletes the pixels. This mode deletes all eliminated lines of pixels without
trying to preserve their information.
| HALFTONE
| Maps pixels from the source rectangle into blocks of pixels in the destination
rectangle. The average color over the destination block of pixels approximates
the color of the source pixels.
|
| After setting the HALFTONE stretching mode, an application must call the SetBrushOrgEx function to set the brush origin. If it fails to do so, brush misalignment
occurs.
| STRETCH_ANDSCANS
| Same as BLACKONWHITE.
| STRETCH_DELETESCANS
| Same as COLORONCOLOR.
| STRETCH_HALFTONE
| Same as HALFTONE.
| STRETCH_ORSCANS
| Same as WHITEONBLACK.
| WHITEONBLACK
| Performs a Boolean OR operation using the color values for the eliminated and
existing pixels. If the bitmap is a monochrome bitmap, this mode preserves
white pixels at the expense of black pixels.
|
Return Values
If the function succeeds, the return value is the previous stretching mode.
If the function fails, the return value is zero.
Remarks
The stretching mode defines how Windows combines rows or columns of a bitmap
with existing pixels on a display device when an application calls the StretchBlt function.
The BLACKONWHITE (STRETCH_ANDSCANS) and WHITEONBLACK (STRETCH_ORSCANS) modes
are typically used to preserve foreground pixels in monochrome bitmaps. The
COLORONCOLOR (STRETCH_DELETESCANS) mode is typically used to preserve color in
color bitmaps.
The HALFTONE mode requires more processing of the source image than the other
three modes; it is slower than the others but produces higher quality images.
Also note that SetBrushOrgEx must be called after setting the HALFTONE mode to avoid brush misalignment.
Additional stretching modes might also be available depending on the
capabilities of the device driver.
See Also
GetStretchBltMode, SetBrushOrgEx, StretchBlt
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
