Thanks for posting your code. I have been looking
through it and have a bunch of questions:
1. "I use this code to draw a bitmap >64k from a
stream resource -"
When you say a bitmap, I'm assuming that you are
referring to a 'Tbmp' resource in the resource db and
not a .BMP file on an external card right?
2. If you meant 'Tbmp', how were you able to create
it and attach it to the resource db if the resource db
limit is 64k per resource? Did you split the image
and then run pilrc?
3. My original goal was to read a .BMP file from an
external card and then display it. Did you use the
.BMP to 'Tbmp' conversion code from pilrc to create a
'Tbmp' file >64k?
Thanks
Anning
--- Rob <[EMAIL PROTECTED]> wrote:
> I use this code to draw a bitmap >64k from a stream
> resource -
>
>
> {
> FileHand inHand;
> t_bmpDetails bmpDetails;
> BitmapPtr bitmapP;
> UInt32 bitmapDataSize,bitmapHeaderSize;
> Int32 objectsRead;
> UInt32 density;
> Boolean highDensityBackground=false;
>
>
>
inHand=FileOpen(0,dbJpgCacheName,dBJpgCacheType,launcherFileCreator,fileModeReadOnly,&error)
> ;
> if (inHand) //there is a stored bitmap!
> {
>
>
objectsRead=FileRead(inHand,&bmpDetails,sizeof(t_bmpDetails),1,&error);
>
> bitmapP = BmpCreate(bmpDetails.width,
> bmpDetails.height,
> bmpDetails.depth, NULL, &error);
> if (bitmapP)
> {
>
>
BmpGetSizes(bitmapP,&bitmapDataSize,&bitmapHeaderSize);
>
>
>
objectsRead=FileRead(inHand,BmpGlueGetBits(bitmapP),bitmapDataSize,1,&error);
> }
> FileClose(inHand);
>
> WinScreenGetAttribute(winScreenDensity,&density);
> if (objectsRead==1)
> {
> Int16 x,y;
> if (density==kDensityDouble &&
> (bmpDetails.width>160 ||
> bmpDetails.height>160))
> {
> BitmapTypeV3 *tempBitmapP;
>
>
tempBitmapP=BmpCreateBitmapV3(bitmapP,kDensityDouble,BmpGlueGetBits(bitmapP),NULL);
> BmpDelete(bitmapP);
> bitmapP=(BitmapPtr)tempBitmapP;
> highDensityBackground=true;
> //change bitmap size to correct value in normal
> coordinates
> bmpDetails.width=bmpDetails.width/2;
> bmpDetails.height=bmpDetails.height/2;
> }
>
> //
> //screenSize= highDensityBackground?320:160;
>
> x=bmpDetails.width<160?((160-bmpDetails.width)/2):0;
>
>
y=bmpDetails.height<160?((160-bmpDetails.height)/2):0;
> WinPaintBitmap(bitmapP,x,y);
> }
> BmpDelete(bitmapP);
> }
> }
>
>
> for this to work - I have saved the bitmap myself,
> so I can fill in the
> typedef struct {
> Int16 width;
> Int16 height;
> UInt8 depth;
> } t_bmpDetails;
>
>
> You could adapt this approach to work with vfs
> pretty easily.
> email me if you need more details.
>
> Rob
>
> On Thu, 14 Jul 2005 20:14:53 -0600, ThuNguyet Nguyen
>
> <[EMAIL PROTECTED]> wrote:
>
> > Hi there,
> >
> >> Has anyone drawn a bitmap bigger than 64k
> >> from an external card before? I was able
> >> to get the image from the card and allocate
> >> enough memory for a MemPtr to hold it by
> >> using MemGluePtrNew. After casting the
> >> MemPtr as a BitmapPtr, I called
> >> WinDrawBitmap(someBitmap,0,0) in the
> >> frmOpenEvent event handler, but nothing
> >> showed up... Can somebody help?
> >
> > Can you draw a smaller bitmap from the external
> card? If not, try that
> > first.
> >
> >> WinDrawBitmap(someBitmap,0,0)
> > Input data someBitmap (of WinDrawBitmap()) is in
> the Palm bitmap format
> > (bitmap family, check the "Palm OS Programmer's
> Companion"). It is a lot
> > different than the format of images (.bmp,.gif,
> .jpg, etc...)
> >
> > If you can load the image in advanced, cut the
> image to smaller size
> > imagees and put them in the resources (using
> Constructor).
> >
> > If you have to load the image at runtime
> >
>
http://flippinbits.com/twiki/bin/view/Main/DevelopmentToolsList
> > has links for some image related libraries.
> >
> > I tried to show images at run time on the Palm but
> I couldn't get the
> > right color table (color pallete) and I gave up.
> >
> > If you find out how to draw bitmap from external
> card, let me know too,
> > please.
> >
> > tnn
> >
>
>
>
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