C / C++ / MFC

17-Dec-07 6:19

I am trying to get a small Windows program to follow the example in http://msdn2.microsoft.com/en-us/library/ms533844.aspx , which reads an image from a .BMP and writes it to a .JPG . I have got it to compile, except for one persistent error: "'GetEncoderClsid': identifier not found". (This is the line afer the comment "// Get the CLSID of the JPEG encoder.".) Please, is this name GetEncoderClsid mistyped in the original? or what? Thanks.

toxcct17-Dec-07 6:29

17-Dec-07 6:29

did you forget to forward declare it before the main() function ?

INT GetEncoderClsid(const WCHAR* format, CLSID* pClsid);  // helper function

or you didn't didn't include the function implementation, which is shown on a link above the code :

"The main function relies on the helper function GetEncoderClsid, which is shown in Retrieving the Class Identifier for an Encoder[^]"

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Anthony Appleyard17-Dec-07 6:41

17-Dec-07 6:41

Thanks. I inserted the line

INT GetEncoderClsid(const WCHAR* format, CLSID* pClsid); // helper function

and it caused successful compilation but this link error:

unresolved external symbol "int __cdecl GetEncoderClsid(wchar_t const *,struct _GUID *)" (?GetEncoderClsid@@YAHPB_WPAU_GUID@@@Z) referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)

toxcct17-Dec-07 6:44

17-Dec-07 6:44

YES !

follow the link[^] I gave you, which I got from you original link. the code of the method is there. copy it and paste it in your project.

D'Oh! | :doh:

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Anthony Appleyard17-Dec-07 6:53

17-Dec-07 6:53

Thanks. It worked!!!!!!!!!!!!!!. It copied a BMP file to a JPG file with modew conversion, like I wanted. Thanks everybody.

toxcct17-Dec-07 6:55

17-Dec-07 6:55

Anthony Appleyard wrote:
Thanks everybody

man, I was alone on this thread Sigh | :sigh:

BTW, please read the WHOLE page after now, because I didn't invent anything. all you need was provided in the first related link.

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David Crow17-Dec-07 7:30

David Crow

17-Dec-07 7:30

toxcct wrote:
because I didn't invent anything.

Ahh, don't be so modest, Tox. We all know that your middle name is bmp-to-jpg.

Hey man

CPallini17-Dec-07 7:47

How to call Windows's built-in routines to read and write JPG files?

17-Dec-07 7:47

Hey man, I made his GDI+ environment compile! http://www.codeproject.com/script/Forums/View.aspx?fid=1647&msg=2359861[^]
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Anthony Appleyard17-Dec-07 4:04

17-Dec-07 4:04

I have the free version of Visual C++ 2008.

In reply to this query, you told me to read http://msdn2.microsoft.com/en-us/library/ms533798.aspx about GDI+.

I went from there to its subpage about "Setting JPEG Compression Level", which has an example coding. Thus, I first inserted the line
#include <gdiplus.h>
in a small test program. The result was 104 compile errors and 8 warnings, of which the first were:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1>c:\program files\microsoft sdks\windows\v6.0a\include\gdiplusimaging.h(74) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
...\include\gdiplusimaging.h(74) : error C2440: 'initializing' : cannot convert from 'const char [37]' to 'int'
1> There is no context in which this conversion is possible
...\include\gdiplusimaging.h(74) : error C2146: syntax error : missing ';' before identifier 'IImageBytes'
...include\gdiplusimaging.h(74) : error C2470: 'IImageBytes' : looks like a function definition, but there is no parameter list; skipping apparent body
...\include\gdiplusimaging.h(74) : error C2059: syntax error : 'public'
...\include\gdiplusimaging.h(280) : error C2146: syntax error : missing ';' before identifier 'id'
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Please, what should I do now?

Typo sorry

Anthony Appleyard17-Dec-07 4:07

Re: About the "Typo sorry"

17-Dec-07 4:07

I inserted #include (less-than-sign) gdiplus.h (greater-than-sign) :: the %^&*&* vagaries of HTLM code.

About the "Typo sorry"

Nelek17-Dec-07 4:29

Nelek

17-Dec-07 4:29

for < > lines just use a blank space to separate the signs from the texts
#include < header.h >
template < BLABLABLA >

or click on Ignore HTML tags in this message (good for code snippets)

Greetings.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

toxcct17-Dec-07 4:43

Re: About the "Typo sorry"

17-Dec-07 4:43

Nelek wrote:
for < > lines just use a blank space to separate the signs from the texts

...or just type < >

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Nelek17-Dec-07 21:27

Nelek

17-Dec-07 21:27

Yes, you are right, I forgot the new issues Wink | ;)

Greetings.
--------
M.D.V. Wink | ;)

Re: How to call Windows's built-in routines to read and write JPG files?

CPallini17-Dec-07 4:23

Re: How to call Windows's built-in routines to read and write JPG files?

17-Dec-07 4:23

Probably you have to remove

#define WIN32_LEAN_AND_MEAN

in your stdafx.h header (or wherever else it is in your project).

see http://www.gamedev.net/community/forums/topic.asp?topic_id=303606[^]

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Anthony Appleyard17-Dec-07 4:27

Re: How to call Windows's built-in routines to read and write JPG files?

17-Dec-07 4:27

Thanks. That cured it. ~~~~

Anthony Appleyard17-Dec-07 4:53

Re: How to call Windows's built-in routines to read and write JPG files?

17-Dec-07 4:53

I then inserted the instructions:

GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
Image* image = new Image(L"C:\\Poser4\\~~~~~.bmp");

and the result was successful compilation and these 7 linking faults:

>qwerty.obj : error LNK2019: unresolved external symbol _GdiplusStartup@12 referenced in function "long __stdcall WndProc(struct HWND__ *,unsigned int,unsigned int,long)" (?WndProc@@YGJPAUHWND__@@IIJ@Z)
1>qwerty.obj : error LNK2019: unresolved external symbol _GdipFree@4 referenced in function "public: static void __cdecl Gdiplus::GdiplusBase::operator delete(void *)" (??3GdiplusBase@Gdiplus@@SAXPAX@Z)
1>qwerty.obj : error LNK2019: unresolved external symbol _GdipAlloc@4 referenced in function "public: static void * __cdecl Gdiplus::GdiplusBase::operator new(unsigned int)" (??2GdiplusBase@Gdiplus@@SAPAXI@Z)
1>qwerty.obj : error LNK2019: unresolved external symbol _GdipLoadImageFromFile@8 referenced in function "public: __thiscall Gdiplus::Image::Image(wchar_t const *,int)" (??0Image@Gdiplus@@QAE@PB_WH@Z)
1>qwerty.obj : error LNK2019: unresolved external symbol _GdipLoadImageFromFileICM@8 referenced in function "public: __thiscall Gdiplus::Image::Image(wchar_t const *,int)" (??0Image@Gdiplus@@QAE@PB_WH@Z)
1>qwerty.obj : error LNK2019: unresolved external symbol _GdipDisposeImage@4 referenced in function "public: virtual __thiscall Gdiplus::Image::~Image(void)" (??1Image@Gdiplus@@UAE@XZ)
1>qwerty.obj : error LNK2019: unresolved external symbol _GdipCloneImage@8 referenced in function "public: virtual class Gdiplus::Image * __thiscall Gdiplus::Image::Clone(void)" (?Clone@Image@Gdiplus@@UAEPAV12@XZ)

Please what now??????????

CPallini17-Dec-07 5:04

Re: How to call Windows's built-in routines to read and write JPG files?

17-Dec-07 5:04

You have to link to Gdiplus.lib too.
Select Project properties menu item, the choose Configuration Porperties->Linker->Command Line and add Gdiplus.lib to the additional options textbox.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Anthony Appleyard17-Dec-07 5:06

Re: How to call Windows's built-in routines to read and write JPG files?

17-Dec-07 5:06

Thanks. It compiled OK.

CPallini17-Dec-07 5:16