I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
5  1141 
check out this resource, it has some good info about graphics http://www.bobpowell.net/
HTH
Ollie Riches
"_R" <_R@nomail.or g> wrote in message
news:uh******** *************** *********@4ax.c om... I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
>"_R" <_R@nomail.or g> wrote in message news:uh******* *************** **********@4ax. com...I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
On Sat, 10 Sep 2005 19:19:53 +0100, "Ollie Riches"
<ol**********@p honeanalyser.ne t> wrote:
check out this resource, it has some good info about graphics
http://www.bobpowell.net/
Thanks, Ollie. I have been to Bob's site, but didn't see anything
relating speeds of PInvoked Win32 calls. I was kind of hoping that
Bob or someone would jump in here. <g> I know this must have been
explored in detail.
have you tried www.pinvoke.net
HTH
Ollie Riches
"_R" <_R@nomail.or g> wrote in message
news:uh******** *************** *********@4ax.c om... I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
in fact here you go http://www.pinvoke.net/default.aspx/...eateDIBSection
HTH
Ollie Riches
"_R" <_R@nospam.or g> wrote in message
news:0j******** *************** *********@4ax.c om... "_R" <_R@nomail.or g> wrote in message
news:uh****** *************** ***********@4ax .com...I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
On Sat, 10 Sep 2005 19:19:53 +0100, "Ollie Riches"
<ol**********@p honeanalyser.ne t> wrote:
check out this resource, it has some good info about graphics
http://www.bobpowell.net/
Thanks, Ollie. I have been to Bob's site, but didn't see anything
relating speeds of PInvoked Win32 calls. I was kind of hoping that
Bob or someone would jump in here. <g> I know this must have been
explored in detail.
>> >"_R" <_R@nomail.or g> wrote in message news:uh***** *************** ************@4a x.com...
I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
On Sun, 11 Sep 2005 18:53:41 +0100, "Ollie Riches"
<ol**********@p honeanalyser.ne t> wrote:
in fact here you go
http://www.pinvoke.net/default.aspx/...eateDIBSection
Great resource, thanks. They even have a short stretch of sample code
for bitblt. I have seen PInvoked Bitblt code posted before but always
as "Why doesn't this work."
I guess I'll have to code both GDI and GDI+ and run my own benchmarks.
I had expected those numbers to be available somewhere, as well as
some organized classes for PInvoking GDI functions. You'd think... This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: DraguVaso |
last post by:
Hi,
In the override of the Paint-method of a DataGridTextBoxColumn I want to
show an image with BitBlt, to see what I can gain there on performance.
The problem is: It doesn't show me the image in the DataGrid-Cell's, but a
black background...
Does anybody has any idea what I am doing wrong?
Thanks a lot in advance,
|
by: JackS |
last post by:
I am trying to use GDI32 bitblt to write a bitmap to a control's window, but all I get is an empty rectangle of some rop-dependent color. In short, I use the following logic in a paint event handler:
dstGr = args.graphics;
srcGr = Graphics.FromImage( bitmap );
dstHdc = dstGr.GetHdc();
srcHdc = srcGr.GetHdc();
BitBlt( dstHdc, x, y, width, height, srcHdc, 0, 0, rop );
What am I doing wrong? A complete demo program follows.
|
by: _R |
last post by:
I need to establish a canvas for sorts, for painting primarily single
line pictures. Lines and images are currently drawn into raw
graphics space which is derived from a control, using LockBits.
I'm wondering if there is a quicker way to do this (like a wrapper for
Win32 DibSection with PInvoke'd BitBlt?)
|
by: Raed Sawalha |
last post by:
Dear,
Can I use BitBlt , and GetDC with ASP.NET?
|
by: VB Programmer |
last post by:
I am using the BitBlt operation to capture various controls into jpegs.
It's almost like a screen capture, but of just the control. (This is a
VB.NET application.)
Because of BitBlt limitations I know that the application has to always be
on top.
The problem: I am running this application on a Windows Server 2003 PC. The
server is in another state (North Carolina). I am in Florida. I access the
server over Termincal Server /Remote...
| | |
by: matt |
last post by:
Hallo,
I have to create a simple sprite movement;
in VB6 I used the API BitBlt and all was very good.
Using the NET graphical methods (not API) ,
the result is slow.
Do you have a NET example about BitBlt and the sprite movement ,
because I'm a little in trouble in implementing it
|
by: Galen Somerville |
last post by:
I'm doing something wrong. I made up a test app and put the ZIP file on my
website
http://home.surewest.net/galen/index.html under Downloads.
Basically I have a Panel that will get continuous updates and I don't want
any flicker. In the test app it sets up a mem map and sets it to Black.
When the Button is clicked it calls a routine that puts tick marks at top
and bottom. The tick marks do not show up.
|
by: Martijn Mulder |
last post by:
/*
BitBlt.cs
C# code using P/Invoke
I have good reasons to use P/Invoke to get access to the Win32 API
function BitBlt(). But I have trouble understanding the workings of it.
Below is a small, compilable and runnable program that shows the
|
by: =?Utf-8?B?Y3JhbmtlX2JveQ==?= |
last post by:
Hi Folks,
I'm not sure where this post belongs since I'm using managed vc.net, but the
issue is around GDI BitBlt.
Here is a summary of the problem:
- I am trying to copy a bitmap of my main form into a picture box.
- To do this, I bitblt using the device contexts of the form and a bitmap
object.
- After blitting, the bitmap image is always blank. I don't understand what
|
by: crankeboy |
last post by:
Hi Folks,
My setup: Visual Studio Express 2008, VC++, .NET, BitBlt
Here is a summary of the problem:
- I am trying to copy a bitmap of my main form into a picture box.
- To do this, I bitblt using the device contexts of the form and a bitmap object.
- After blitting, the bitmap image is always blank. I don't understand what I'm doing wrong here.
Here is my relevant code:
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
| | |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
| | |
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| | |
