To save an image

[Enrico Maria Giordano]

As I understood,

GDIP_IMAGEFROMFILE( cFile, .T. )

can now be used to load an image without FREEIMAGE.DLL. Is there something similar to SAVE an image?

EMG

[Antonio Linares]

Enrico,

Manuel (Mastintin) is our GDI master. Lets see what he can tell us.

[mastintin]

GDIP_IMAGEFROMFILE( cFile, .T. ) return classic hbitmap

Seria posible no usar freeimage.dll en la mayoria de los formatos imagenes comunes .
Funciona correcto con jpg, gif,tif,png, bmp , ico
Mas facil es unsar la clase creada a tal efecto y que se encuentra en c:\fwh\sources\tgdiplus.prg ...
Para grabar una imagen seria lago asi ...

Code: Select all  Expand view

local cImage := "image.bmp"
local
local oGdi := GDIBmp():new( cImage )
        oGdi:save( "imagenfinal.png")
       oGdi:end()
 

[Enrico Maria Giordano]

Thank you. I'm going to experiment with it.

EMG

[Enrico Maria Giordano]

Ok, it's working, thank you.

EMG

[Enrico Maria Giordano]

These are a couple of functions I wrote:

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REQUEST GDIBMP


FUNCTION LOADIMG( cFile )

    IF !FILE( cFile )
        RETURN 0
    ENDIF

    RETURN GDIP_IMAGEFROMFILE( cFile, .T. )


FUNCTION SAVEIMG( cSrcFile, cDstFile )

    LOCAL aExt := { "BMP", "JPG", "GIF", "TIF", "PNG" }

    LOCAL aIds := { "{557CF400-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF401-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF402-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF405-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF406-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF403-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF404-1A04-11D3-9A73-0000F81EF32E}",;
                    "{557CF407-1A04-11D3-9A73-0000F81EF32E}" }

    LOCAL cExt := CFILEEXT( cDstFile )

    LOCAL nExt := ASCAN( aExt, cExt )

    LOCAL cId := aIds[ nExt ]

    LOCAL hImg := GDIPLUSIMAGELOADCACHEDFILE( cSrcFile )

    IF hImg = 0 THEN RETURN .F.

    GDIPLUSIMAGESAVE( hImg, ANSITOWIDE( cDstFile ), ANSITOWIDE( cId ) )

    DELETEOBJECT( hImg )

    RETURN .T.

EMG

[mastintin]

These are a couple of functions I wrote:

[code=fw]

GDIPLUSIMAGESAVE( hImg, ANSITOWIDE( cDstFile ), ANSITOWIDE( cId ) )


EMG

Enrico, GDIPLUSIMAGESAVE function transform asitowide in your code ... is not necessary ansitowide functions

std::string str = hb_parc(2) ;
std::wstring wstr (str.begin(), str.end());
LPWSTR file = (LPWSTR) wstr.c_str();

[Enrico Maria Giordano]

I've already tried: it doesn't work without ANSITOWIDE().

EMG

[Enrico Maria Giordano]

[quote="Enrico Maria Giordano"

Code: Select all  Expand view

    LOCAL hImg := GDIPLUSIMAGELOADCACHEDFILE( cSrcFile )

    IF hImg = 0 THEN RETURN .F.

    GDIPLUSIMAGESAVE( hImg, ANSITOWIDE( cDstFile ), ANSITOWIDE( cId ) )

    DELETEOBJECT( hImg )[/quote]

Do I have to use

Code: Select all  Expand view

GDIP_DELETEIMAGE( hImg )

instead to release the image, right? Can you confirm this?

EMG

[mastintin]

[quote="Enrico Maria Giordano"

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   LOCAL hImg := GDIPLUSIMAGELOADCACHEDFILE( cSrcFile )

    IF hImg = 0 THEN RETURN .F.

    GDIPLUSIMAGESAVE( hImg, ANSITOWIDE( cDstFile ), ANSITOWIDE( cId ) )

    DELETEOBJECT( hImg )[/quote]

Do I have to use

Code: Select all  Expand view

GDIP_DELETEIMAGE( hImg )

instead to release the image, right? Can you confirm this?

EMG

Yes. Enrico use
GDIP_DELETEIMAGE( hImg ) // release pointer to gdi+ image object
instead
DELETEOBJECT( hImg ) // release pointer to "classic" image object

[Enrico Maria Giordano]

Thank you. Do you have any news for the quality of saved GIF?

Sample:

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#include "Fivewin.ch"


FUNCTION MAIN()

    LOCAL cSrcImage := "c:\fwh\bitmaps\magic.bmp"
    LOCAL cDstImage := "magic.gif"

    LOCAL oGdi := GDIBmp():New( cSrcImage )

    oGdi:Save( cDstImage )

    oGdi:End()

    RETURN NIL

EMG

[mastintin]

Enrico . No more news.
to solve the problem, we first have to develop code for octree algorithm and my c ++ does not go that far. I have c ++ code that is done but do not get removed compile errors.
However, the GIF format is licensed for use and is overwhelmed by png or tif.
If anyone is encouraged... your code is this ....
https://www.dropbox.com/s/3syub4enpg5lx ... r.cpp?dl=0
Cheers

[Enrico Maria Giordano]

Do you have QColorQuantizer.h?

EMG

[mastintin]

here.
https://dl.dropboxusercontent.com/u/132 ... uantizer.h

[Enrico Maria Giordano]

Error 404 (Page not found).

EMG