|
DrawDib Operations
You can access the entire group of DrawDib functions by using the DrawDibOpen function. This function loads the dynamic-link library (DLL), allocates
memory resources, creates a DrawDib device context (DC), and maintains a reference
count of the number of DCs that are initialized. DrawDibOpen also returns a handle of the new DC that you use with the other DrawDib
functions.
You can release a DrawDib DC when you finish using it by using the DrawDibClose function. DrawDibClose also decrements the reference count of the applications accessing the DLL.
The call to DrawDibClose should be the last DrawDib function in your application.
You can create as many DrawDib DCs as you want. You can use multiple DrawDib
DCs to draw several bitmaps simultaneously. You can also create multiple DrawDib
DCs, each with unique characteristics, so your application can choose and then
use the DC with the most appropriate settings. For example, you can create two
DrawDib DCs in an application: one that displays an image at its normal
resolution, and the other that displays an enlarged portion of the image.
To run efficiently, DrawDib functions require information about the display
adapter and its driver. The display profile is obtained by running a series of
tests on the display adapter the first time the DLL containing the DrawDib
functions is accessed. The DrawDib functions use this information for all
applications. You can repeat these tests when necessary by using the DrawDibProfileDisplay function.
Note Retrieving and storing the display profile is typically a one-time
occurrence. If, however, the profile information is deleted or another display driver is
installed in the system, DrawDib reruns the tests.
Programming books recommended by Amazon.com
More programming books on Amazon.com
|
Share this page
|
|
Follow us
|
| 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
|
