Monitoring GDI calls
Is there a tool that allows one to monitor GDI calls? ...
gdi
Polygon fill modes in GDI and GDI+
The system default polygon fill mode in current device context is ALTERNATE (as I've learned from the Petzold book on Windows programming) and this one is used in Polygon Win32 function unless you change the mode with SetPolyFillMode. My question is: Does the GDI+ Graphics::FillPolygon (without the FillMode parameter in its signature) m...
Win32 CreatePatternBrush
MSDN displays the following for CreatePatternBrush: You can delete a pattern brush without affecting the associated bitmap by using the DeleteObject function. Therefore, you can then use this bitmap to create any number of pattern brushes. My question is the opposite. If the HBRUSH is long lived, can I delete the HBITMAP ...
How to determine the size of the button portion of a Windows radio button
I'm drawing old school (unthemed - themed radios are a whole other problem) radio buttons myself using DrawFrameControl: DrawFrameControl(dc, &rectRadio, DFC_BUTTON, isChecked() ? DFCS_BUTTONRADIO | DFCS_CHECKED : DFCS_BUTTONRADIO); I've never been able to figure out a sure fire way to figure out what to pass for the RECT. I've been u...
How can drawString method be used for writing diagonal way.
Hi, I am using c# 2005 i want to write string diagonally on image. But by default c# provides the option to write horizontally or vertically. how we write diagonally? Thanks ...
Finding GDI/User resource usage from a crash dump
I have a crash dump of an application that is supposedly leaking GDI. The app is running on XP and I have no problems loading it into WinDbg to look at it. Previously we have use the Gdikdx.dll extension to look at Gdi information but this extension is not supported on XP or Vista. Does anyone have any pointers for finding GDI object...
Heisenbug: WinApi program crashes on some computers
Please help! I'm really at my wits' end. My program is a little personal notes manager (google for "cintanotes"). On some computers (and of course I own none of them) it crashes with an unhandled exception just after start. Nothing special about these computers could be said, except that they tend to have AMD CPUs. Environment: Windows...
Sharing GDI handles between processes in Windows CE 6.0
Hello, I know that GDI handles are unique and process specific in 'Big Windows' but do they work the same way in Windows CE 6.0? For example: I've got a font management service that several other services and applications will be using. This service has a list of valid fonts and configurations for printing and displaying; CreateFontInd...
How to create a very big bitmap in C++/MFC / GDI
I'd like to be able to create a large (say 20,000 x 20,000) pixel bitmap in a C++ MFC application, using a CDC derived class to write to the bitmap. I've tried using memory DCs as described in the MSDN docs, but these appear to be restricted to sizes compatible with the current display driver. I'm currently using a bitmap print driver ...
GDI has been accelerated. Does anyone know when this happened?
To sketch the background of this question : at work we use Dell Precision workstations. My current one has got an NVidia Quadro FX1700. My team is developing the graphics components for a real time data acquisition system. So we are always looking out to see if the graphics operations don't use up too much CPU time. For quick checks, we ...
How to avoid flicker while handling WM_ERASEBKGND in Windows dialog
I have a dialog that resizes. It also has a custom background which I paint in response to a WM_ERASEBKGND call (currently a simple call to FillSolidRect). When the dialog is resized, there is tremendous flickering going on. To try and reduce the flickering I enumerate all child windows and add them to the clipping region. That see...
What library should be included to use TransparentBlt?
What library should be included to use TransparentBlt? This is VC98 (Visual Studio 6) linking to the Gdi32.lib. (Other GDI functions such as BitBlt link as expected), and the compilers compiles with out error or warning. Even though the Gdi32.lib is included, yet the linker returns this error: mtcombo.obj : error LNK2001: unresolved ...
GDI resource leak in DrawFrameControl
It seems that DrawFrameControl() creates Font and Brush objects, select them into dc, and doesn't delete them. (according to BoundsChecker messages). Does anyone faced such thing? ...
Change a Window background color, given a IntPtr handle
In c#, I have a handle to a window ( an IntPtr ), I want to change the background color of that window. How can I do this? I can get the GDI graphics object for that handle like so: Graphics graphics = Graphics.FromHwnd(theHandle); So I should somehow be able to change the background color from this? I also want to ensure the backgr...
Fast library to replace CDC vector graphics
I have a mature MFC C++ application that displays on screen and prints using CDC wrappings on the Win32 GDI. While it has been optimized over the years, I would like to replace it with something a bit faster. The graphics included rendered triangular surface models, complex polylines and polygons, and lots of text. It needs to meet th...
Visual C++: Avoiding overlapping of paint events, arching lines through click and drag?
I am currently a student and trying to design a Visual C++ application to allow me to visually insert an oriented graph in order to create a text file with the graph's matrix. At this point I have created an onClick event to create nodes and have used the form's Paint event to draw the nodes. I have also inserted the conditions to avoid...
Issues with using unsupported Win32 GDI Pens modes?
The MSDN documentation is (somewhat) clear about the following two facts about GDI Pens: A Cosmetic pen (create via CreatePen or ExtCreatePen w/ PS_COSMETIC) must be 1 unit wide (well, <= 1, but let's not go there). A Geometric (ExtCreatePen w/ PS_GEOMETRIC) pen must solid (PS_SOLID only, no PS_DASH, etc). They can, however, draw fatt...
C#/GDI - Create 1bpp mask from image.
How do you create a 1 bit per pixel mask from an image using GDI in C#? The image I am trying to create the mask from is held in a System.Drawing.Graphics object. I have seen examples that use Get/SetPixel in a loop, which are too slow. The method that interests me is one that uses only BitBlits, like this. I just can't get it to work ...
Windows GDI: horizontal/vertical DPI
When obtaining the DPI for the screen under Windows (by using ::GetDeviceCaps) will the horizontal value always be the same as the vertical? For example: HDC dc = ::GetDC(NULL); const int xDPI = ::GetDeviceCaps(dc, LOGPIXELSX); const int yDPI - ::GetDeviceCaps(dc, LOGPIXELSY); assert(xDPI == yDPI); ::ReleaseDC(NULL, dc); Are these va...
What is the best way to track and lower GD handles?
what is the best way to track and lower GDI windows handles . . ...