c++.windows.32-bits - AlphaBlend (msimg32.lib)
- Dejan Lekic (7/7) May 10 2006 Hi everybody,
- Bertel Brander (9/16) May 10 2006 You could try to create one from msimg32.dll found in your
- Dejan Lekic (23/23) May 11 2006 Yeah, i did it, i got msimg32.lib, but than i have discovered that
- Bertel Brander (7/9) May 11 2006 Do you still get the multiple declaration of main warning?
- Matthew (53/76) May 27 2006 I don't know if it's directly germane to your issue, but you can now use
Hi everybody, few minutes ago i have tried to build a snapshot of FLTK 2.0 on my workstation, and failed because there is no msimg32 library in DM C/C++ distribution (freely downloadable one). Does anyone know where to get this library from? Kind regards Dejan Lekic
May 10 2006
Dejan Lekic wrote:Hi everybody, few minutes ago i have tried to build a snapshot of FLTK 2.0 on my workstation, and failed because there is no msimg32 library in DM C/C++ distribution (freely downloadable one). Does anyone know where to get this library from?You could try to create one from msimg32.dll found in your windows' system32 folder. It can be done with this command: implib.exe /noi msimg32.lib msimg32.dll -- Absolutely not the best homepage on the net: http://home20.inet.tele.dk/midgaard But it's mine - Bertel
May 10 2006
Yeah, i did it, i got msimg32.lib, but than i have discovered that actual problem lies in old headers... I could not just copy headers from MS PSDK or MinGW's Win32 API package because they are not compatible with DM C/C++. What i did was to declare all AlphaBlend-related types and functions inside #if __DMC__ at the top of my C++ sources and everything seemed to work until it came to the linking. Btw. i am using Code::Blocks for this little adventure. Than i got this: -------------- Build: fltk-static-debug in windows-dmc --------------- Linking static library: ..\..\lib\fltk2-debug.lib Digital Mars Librarian Version 8.00n Copyright (C) Digital Mars 2000-2002 All Rights Reserved www.digitalmars.com Warning: Public '_main' already in library, redefinition ignored. Error: /PAGESIZE:16 is too small Process terminated with status 1 (0 minutes, 0 seconds) 0 errors, 0 warnings When i added -p32 in the additional link properties (even though it is actually a librarian's flag) build passed well. But, executable does not do anything... How to debug it? It can be bad msimg32.lib or somehing else... Kind regards Dejan Lekic
May 11 2006
Bertel Brander <bertel post4.tele.dk> But, executable does not do anything... How to debug it? It can be bad msimg32.lib or somehing else...Do you still get the multiple declaration of main warning? To debug it, either buy the IDDE from Digital Mars, or put in some trace statements. -- Absolutely not the best homepage on the net: http://home20.inet.tele.dk/midgaard But it's mine - Bertel
May 11 2006
I don't know if it's directly germane to your issue, but you can now use
dl_call (from WinSTL sub-project of STLSoft; also one for UNIX in UNIXSTL)
for invoking, in a type-safe manner, any C function from any DLL, in
occasions such as when confronted with not having up-to-date libraries.
For example, AlphaBlend can be invoked thusly:
HDC hdcDest;
int nXOriginDest;
int nYOriginDest;
int nWidthDest;
int nHeightDest;
HDC hdcSrc;
int nXOriginSrc;
int nYOriginSrc;
int nWidthSrc;
int nHeightSrc;
BLENDFUNCTION blendFunction;
winstl::dl_call<BOOL>( "msimg32.dll"
, "S:AlphaBlend"
, hdcDest
, nXOriginDest
, nYOriginDest
, nWidthDest
, nHeightDest
, hdcSrc
, nXOriginSrc
, nYOriginSrc
, nWidthSrc
, nHeightSrc
, blendFunction);
Note: For safety, dl_call() does a static assert on the type of each
argument, to ensure that it is:
- fundamental type, or
- pointer type, or
- function pointer type.
Some functions, and AlphaBlend is one of them, take arguments of structure
by value. This, by default, causes the static assert to fire. However, the
user may stipulate any type as compatible by specialising the
winstl::is_valid_dl_call_arg traits, as follows:
template <>
struct winstl::is_valid_dl_call_arg<BLENDFUNCTION>
{
enum { value = 1 };
};
As long as this is defined in the same compilation unit as the function that
invokes AlphaBlend, the code shown above will work correctly.
(Note: the is_valid_dl_call_arg traits mechanism was added in the latest
beta (6), which was released a couple of days ago.)
HTH
Cheers
Matthew
"Dejan Lekic" <dejan nu6.org> wrote in message
news:e3v14o$vha$1 digitaldaemon.com...
Yeah, i did it, i got msimg32.lib, but than i have discovered that
actual problem lies in old headers... I could not just copy headers from
MS PSDK or MinGW's Win32 API package because they are not compatible
with DM C/C++.
What i did was to declare all AlphaBlend-related types and functions
inside #if __DMC__ at the top of my C++ sources and everything seemed to
work until it came to the linking.
Btw. i am using Code::Blocks for this little adventure.
Than i got this:
-------------- Build: fltk-static-debug in windows-dmc ---------------
Linking static library: ..\..\lib\fltk2-debug.lib
Digital Mars Librarian Version 8.00n
Copyright (C) Digital Mars 2000-2002 All Rights Reserved
www.digitalmars.com
Warning: Public '_main' already in library, redefinition ignored.
Error: /PAGESIZE:16 is too small
Process terminated with status 1 (0 minutes, 0 seconds)
0 errors, 0 warnings
When i added -p32 in the additional link properties (even though it is
actually a librarian's flag) build passed well.
But, executable does not do anything... How to debug it? It can be bad
msimg32.lib or somehing else...
Kind regards
Dejan Lekic
May 27 2006