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alonso



Joined: 06 Aug 2003
Posts: 15
alonso
Hi, every body

I'm trying to use the api call:
invoke CreateStreamOnHGlobal,pGlobal,TRUE,pStream

But it doesn't can some one please tell me if iStream is a structure and how is it, because I use
pStream dd ?

And it returns an error.

Thanks for your prompt reply and help!

sincerely,
Alonso Murillo.
Post 06 Aug 2003, 23:29
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JohnFound



Joined: 16 Jun 2003
Posts: 3502
Location: Bulgaria
JohnFound
Actually IMHO all is OK with 3-th parameter - pStream, you must set address of dword memory variable to receive pointer for new Stream. Only your pStream variable must not be local.

Try to set pGlobal to NULL:
Code:
invoke CreateStreamOnHGlobal, NULL, TRUE, pStream    


In this case Windows will allocate needed memory automatically. Windows have some requirements for allocated block if you allocate it manually. So let the Windows make it the way it likes.

Regards.
Post 07 Aug 2003, 11:27
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alonso



Joined: 06 Aug 2003
Posts: 15
alonso
Thank very much John for your prompt reply.

What i'm trying to do is translate a MASM program to FASM, but some things are so diferent that some times it's very hard, specially when you don't have alot of Assembly Language skills, but any way here is the orignal Masm code:

IPicture STRUCT
; IUnknown methods
QueryInterface DWORD ?
AddRef DWORD ?
Release DWORD ?
; IPicture methods
get_Handle DWORD ?
get_hPal DWORD ?
get_Type DWORD ?
get_Width DWORD ?
get_Height DWORD ?
Render DWORD ?
set_hPal DWORD ?
get_CurDC DWORD ?
SelectPicture DWORD ?
get_KeepOriginalFormat DWORD ?
put_KeepOriginalFormat DWORD ?
PictureChanged DWORD ?
SaveAsFile DWORD ?
get_Attributes DWORD ?
IPicture ENDS

sIID_IPicture TEXTEQU <{07BF80980H, 0BF32H, 0101AH, \
{08BH, 0BBH, 000H, 0AAH, 000H, 030H, 00CH, 0ABH}}>

IID_IPicture GUID sIID_IPicture

I translate the following code to FASM like this:
struc IPicture STRUCT
{
.handle dd ?
virtual at 0
; IUnknown methods
.QueryInterface dw ?
.AddRef dw ?
.Release dw ?
; IPicture methods
.get_Handle dw ?
.get_hPal dw ?
.get_Type dw ?
.get_Width dw ?
.get_Height dw ?
.Render dw ?
.set_hPal dw ?
.get_CurDC dw ?
.SelectPicture dw ?
.get_KeepOriginalFormat dw ?
.put_KeepOriginalFormat dw ?
.PictureChanged dw ?
.SaveAsFile dw ?
.get_Attributes dw ?
end virtual
}

struc GUID
{
Data1 dd ?
Data2 dw ?
Data3 dw ?
Data4 rb 8
}

struc sIID_IPicture
{
Data1 dd 7BF80980h
Data2 dw 0BF32h
Data3 dw 101Ah
Data4 equ 8BBB00AA00300CABh
}

And to code in Masm was:
invoke CreateStreamOnHGlobal, pGlobal, TRUE, ADDR pStream
invoke OleLoadPicture, pStream, NULL, TRUE, ADDR IID_IPicture, ADDR pPicture

And the translation i did was:
invoke CreateStreamOnHGlobal,pGlobal,TRUE,pStream
invoke OleLoadPicture,[pStream],NULL,TRUE,[IID_IPicture],[pPicture]

All this code compile just fine, but when it runs, OleLoadPicture return the message The address in pStream or ppvObj is not valid. For example, either may be NULL. So this means that either pStream, IID_IPicture or pPicture structures are wrong, can you please help me I would really appreciate it.

Thanks alot and may God bless you. Very Happy

Sincerely,
Alonso M.M
Post 07 Aug 2003, 14:13
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wanderer



Joined: 18 Jun 2003
Posts: 44
Location: Moldova, Kishinev
wanderer
Quote:
And to code in Masm was:
invoke CreateStreamOnHGlobal, pGlobal, TRUE, ADDR pStream
invoke OleLoadPicture, pStream, NULL, TRUE, ADDR IID_IPicture, ADDR pPicture

And the translation i did was:
invoke CreateStreamOnHGlobal,pGlobal,TRUE,pStream
invoke OleLoadPicture,[pStream],NULL,TRUE,[IID_IPicture],[pPicture]


Here is at least one error - translation should be:

Code:
invoke CreateStreamOnHGlobal, [pGlobal], TRUE, pStream 
invoke OleLoadPicture, [pStream], NULL, TRUE, IID_IPicture, pPicture 
    

_________________
Best regards,
Antoch Victor
Post 07 Aug 2003, 17:57
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alonso



Joined: 06 Aug 2003
Posts: 15
alonso
Thanks for your hekp Victor

I try your translation but it return Invalid Value and a message like this pushd ..arg?000018B6, but if I do:

invoke OleLoadPicture,[pStream],NULL,TRUE,IID_IPicture,[pPicture]

Then it compiles just fine but when i run it return the same error: The address in pStream or ppvObj is not valid. For example, either may be NULL.

CAN YOU OR SOME BODY HELP ME PLEASE Question

Sincerely,
Alonso M.M
wanderer wrote:
Quote:
And to code in Masm was:
invoke CreateStreamOnHGlobal, pGlobal, TRUE, ADDR pStream
invoke OleLoadPicture, pStream, NULL, TRUE, ADDR IID_IPicture, ADDR pPicture

And the translation i did was:
invoke CreateStreamOnHGlobal,pGlobal,TRUE,pStream
invoke OleLoadPicture,[pStream],NULL,TRUE,[IID_IPicture],[pPicture]


Here is at least one error - translation should be:

Code:
invoke CreateStreamOnHGlobal, [pGlobal], TRUE, pStream 
invoke OleLoadPicture, [pStream], NULL, TRUE, IID_IPicture, pPicture 
    
[/b]
Post 07 Aug 2003, 20:02
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inskipp



Joined: 23 Jun 2003
Posts: 25
Location: Poland
inskipp
Hello alonso. I have found few errors in your translation:

Quote:
I translate the following code to FASM like this:
struc IPicture STRUCT
{
.handle dd ?
virtual at 0
; IUnknown methods
.QueryInterface dw ?
.AddRef dw ?
.Release dw ?
; IPicture methods
.get_Handle dw ?
.get_hPal dw ?
.get_Type dw ?
.get_Width dw ?


The pointers are of course dword (not word) value, so you have to use dd ? (instead dw ?) in all fields:

Code:
struc IPicture STRUCT 
{ 
.handle dd ? 
virtual at 0 
; IUnknown methods 
.QueryInterface dd ? 
.AddRef dd ? 
.Release dd ? 
; IPicture methods 
.get_Handle dd ? 
.get_hPal dd ? 
.get_Type dd ? 
.get_Width dd ?
     

and so on. Next:
Quote:
struc sIID_IPicture
{
Data1 dd 7BF80980h
Data2 dw 0BF32h
Data3 dw 101Ah
Data4 equ 8BBB00AA00300CABh
}

equ is only costant declaration, so you have to use dq in Data4 declaration:
Code:
Data4 dq 8BBB00AA00300CABh 
    

I'm not sure, if byte order will be correct with dq. If not try this:
Code:
Data4 db 08Bh,0BBh,000h,0AAh,000h,030h,00Ch,0ABh 
    
Post 07 Aug 2003, 21:32
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wanderer



Joined: 18 Jun 2003
Posts: 44
Location: Moldova, Kishinev
wanderer
Quote:
I try your translation but it return Invalid Value and a message like this pushd ..arg?000018B6, but if I do:

invoke OleLoadPicture,[pStream],NULL,TRUE,IID_IPicture,[pPicture]

Then it compiles just fine but when i run it return the same error: The address in pStream or ppvObj is not valid. For example, either may be NULL.


Probably you have pPicture on stack. In that case you can't obtain it's address the way that works for variables in data section. You'll have to write something like:
Code:
lea eax, [pPicture]
invoke OleLoadPicture,[pStream],NULL,TRUE,IID_IPicture,eax
    


Remember, when you write [<var name>] in fasm you mean the content of a variable, not it's address. So when you passed content of pPicture to procedure that interpreted it as address of pPicture you got error.
Also, you can look how to make work OleLoadPicture in my "teeth" example in examples section of fasm website.
Sorry, that I can't help you better, but my hard drive have recently been broken, and now (until it will be repaired) I use old 530MB HDD, and I just can't install all documentation.

_________________
Best regards,
Antoch Victor
Post 07 Aug 2003, 22:27
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alonso



Joined: 06 Aug 2003
Posts: 15
alonso
How do I know if IPicture is on the stack what I did was:

section '.data' data readable writeable
pPicture IPicture

And on the IPicture.inc file this:
struc IPicture
{
.handle dd ?
; virtual at 0
; IUnknown methods
.QueryInterface dd ?
.AddRef dd ?
.Release dd ?
; IPicture methods
.get_Handle dd ?
.get_hPal dd ?
.get_Type dd ?
.get_Width dd ?
.get_Height dd ?
.Render dd ?
.set_hPal dd ?
.get_CurDC dd ?
.SelectPicture dd ?
.get_KeepOriginalFormat dd ?
.put_KeepOriginalFormat dd ?
.PictureChanged dd ?
.SaveAsFile dd ?
.get_Attributes dd ?
; end virtual
}

Now with the code you give me:

lea eax, [pPicture]
invoke OleLoadPicture,[pStream],NULL,TRUE,IID_IPicture,eax

It return E_UNEXPECTED error.
I check with OllyDebuger the program Paint.exe created with Masm and the IID_IPicture data is ok.

And finally I download the sample program you created teeth, I think you did a very nice job on it, but there are some things I do NOT understand like:

In Ole32.inc
virtual at 0
IPicture:
.QueryInterface dd ?
..
..
Why don't you use the struc statement, why virtual at 0 is before the struc name and why when i try to do something like this:
pPicture IPicture
I get a illegal instruction error message??? Question
And If I try to compile your source program i get Out of memory error message (i have Flat Assembler 1.48 for Win).

What is going on?
Can you explain please Wink

Sincerly,
Alonso M.M
Post 12 Aug 2003, 16:25
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wanderer



Joined: 18 Jun 2003
Posts: 44
Location: Moldova, Kishinev
wanderer
Quote:
How do I know if IPicture is on the stack what I did was:

section '.data' data readable writeable
pPicture IPicture

And on the IPicture.inc file this:
struc IPicture
{
.handle dd ?
; virtual at 0
; IUnknown methods
.QueryInterface dd ?
.AddRef dd ?
.Release dd ?
; IPicture methods
.get_Handle dd ?
.get_hPal dd ?
.get_Type dd ?
.get_Width dd ?
.get_Height dd ?
.Render dd ?
.set_hPal dd ?
.get_CurDC dd ?
.SelectPicture dd ?
.get_KeepOriginalFormat dd ?
.put_KeepOriginalFormat dd ?
.PictureChanged dd ?
.SaveAsFile dd ?
.get_Attributes dd ?
; end virtual
}


Well, let's begin from the beginning Smile.
First of all, pPicture is a pointer to object, therefore it should be declared like any other pointer:
Code:
pPicture dd ?    

Also, .handle field is not needed in this definition and you have to write struct IPicture after struc IPicture {...} definition.

Quote:
Now with the code you give me:

lea eax, [pPicture]
invoke OleLoadPicture,[pStream],NULL,TRUE,IID_IPicture,eax

It return E_UNEXPECTED error.
I check with OllyDebuger the program Paint.exe created with Masm and the IID_IPicture data is ok.


In the attachment you'll find a simple program based on teeth Wink, that shows only how to use IPicture. Sorry, it displays resulting bitmap as monochrome, but I don't have time now to figure out the right sequence of CreateCompatibleDC and CreateCompatibleBitmap. It always takes me a lot of time (again and again, I don't know why, I tryed to copy the right order from teeth, however it didn't work). Anyway, it correctly works with CreateStreamOnHGlobal and OleLoadPicture, so it solves your problem.

Quote:

And finally I download the sample program you created teeth, I think you did a very nice job on it, but there are some things I do NOT understand like:

In Ole32.inc
virtual at 0
IPicture:
.QueryInterface dd ?
..
..
Why don't you use the struc statement, why virtual at 0 is before the struc name and why when i try to do something like this:
pPicture IPicture
I get a illegal instruction error message???


Here are defined offsets of methods relative to the beginning of the virtual methods table. All we need here are offsets in the table. You can use the struc statement, but the method I used seems to be more clear for me. And, you get illegal instruction message because IPicture in this case is just label with the offset 0. It's not description of some structure.

Quote:
And If I try to compile your source program i get Out of memory error message (i have Flat Assembler 1.48 for Win).


Go to Options|Compiler Setup in FasmW's menu and set Memory to a bigger value. Teeth is rather big project with a lot of macro calls, that's why it needs 32MB of memory to compile.

Quote:

What is going on?
Can you explain please


Hope, I explained Wink.


Description:
Download
Filename: ipicture.zip
Filesize: 28.82 KB
Downloaded: 435 Time(s)


_________________
Best regards,
Antoch Victor
Post 12 Aug 2003, 22:13
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alonso



Joined: 06 Aug 2003
Posts: 15
alonso
Thank you Victor I download the IPicture sample and will play with it!!!
Post 13 Aug 2003, 16:52
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