Is there any example inside the forum pool for manipulating (set and read) pixels, drawing lines, circles etc? Any help is welcome.
Gunther
You need a DC, i.e. what BeginPaint returns in eax, and various simple graphics functions:
SetPixel
Chord
Ellipse
FillRect
FrameRect
InvertRect
Pie
Polygon
PolyPolygon
Rectangle
RoundRect
Select a brush and a pen into the DC, and go ahead.
Circles are done with
invoke Ellipse, myDC, Rect.left, Rect.top,, Rect.right, Rect.bottom
No rocket science, just try it in the WM_PAINT handler.
hth, jj
you can use SetPixel and GetPixel for maybe a few pixels
but, they are slow
it would seem they create a DC and blit for each pixel
so - much better to create a DC and blit once, edit your pixels, then blit back to the window DC
for lines, there is MoveTo, LineTo, et al
http://msdn.microsoft.com/en-us/library/windows/desktop/dd145031%28v=vs.85%29.aspx (http://msdn.microsoft.com/en-us/library/windows/desktop/dd145031%28v=vs.85%29.aspx)
the real "work horses" are
CreateCompatibleDC
CreateCompatibleBitmap
CreateDIBSection
BitBlt
StretchBlt
TransparentBlt
and the functions that go with them
DeleteDC
DeleteObject
SetStretchBltMode/SetBrushOrgEx
Hi Dave,
thank you for the hints. :t
Gunther
there are a number of forum members that i have learned a lot from
of course, there are the usual suspects :P
and also Seikmanski, guga, gwapo, Tedd, and a few others
another great resource is Jose Roca's site
http://www.jose.it-berater.org/smfforum/index.php (http://www.jose.it-berater.org/smfforum/index.php)
you can search almost any GDI function, and get a few nice examples
Hi Dave,
Quote from: dedndave on March 14, 2013, 06:52:48 AM
there are a number of forum members that i have learned a lot from
of course, there are the usual suspects :P
oh yes, the usual suspects.
Quote from: dedndave on March 14, 2013, 06:52:48 AM
another great resource is Jose Roca's site
http://www.jose.it-berater.org/smfforum/index.php (http://www.jose.it-berater.org/smfforum/index.php)
you can search almost any GDI function, and get a few nice examples
thank you, great ressource.
Gunther
by "usual suspects", i am refering to the guys we learn all kinds of stuff from
Hutch--, qWord, donkey, Vortex, KetilO, jj2007, MichaelW, FORTRANS, ToutEnMasm, BillCravener, etc
you can use the advanced search tool in the new and the old forums to help find things :P
Hi Dave,
Quote from: dedndave on March 14, 2013, 08:29:54 AM
by "usual suspects", i am refering to the guys we learn all kinds of stuff from
Hutch--, qWord, donkey, Vortex, KetilO, jj2007, MichaelW, FORTRANS, ToutEnMasm, BillCravener, etc
yes, that was my impression, too.
Quote from: dedndave on March 14, 2013, 08:29:54 AM
you can use the advanced search tool in the new and the old forums to help find things :P
I'll use the tool. :t
Gunther
let us know if you have some specific task in mind :t
Hi Dave,
Quote from: dedndave on March 15, 2013, 10:27:08 AM
let us know if you have some specific task in mind :t
yes, I'll drop a line.
Gunther
manipulating (set and read) pixels:
There is a fast and a slow method.The slow use API,the fast modify the pixels directly in memory.
A sample of this is here http://masm32.com/board/index.php?topic=835.msg7335#msg7335 (http://masm32.com/board/index.php?topic=835.msg7335#msg7335)
,the region.cpp modifie the pixels to made a transparent color.
Hi ToutEnMasm,
thank you for the link. It was a great help. :t
Gunther