Hi, I want to read a bitmapV3 from resource, modify it, and save it back to
database resource, but the saved resource is not bitmap version 3 and
density of 144, it showed bitmap version 0 and density of 72... I have done
it with the same code for bitmap version 2 (with offscreen creation of
genericFormat) and it works. Below is my code, please help!!!
// open file
DmGetNextDatabaseByTypeCreator(true, &ldssInfo, sysFileTApplication, 'ABCD',
true, &lintCard, &llidDB);
ldorDB = DmOpenDatabase(lintCard, llidDB, dmModeReadWrite);
// read bitmapV3 into memory, modify it and display it on screen
lmhdBitmap = DmGet1Resource('Tbmp', 2008);
if(lmhdBitmap != NULL)
{
lbmpBitmap = (BitmapPtr) MemHandleLock(lmhdBitmap);
lwhdWindow = WinCreateOffscreenWindow(22, 22, nativeFormat, &lerrRV);
lwhdCurrent = WinGetDisplayWindow();
WinSetDrawWindow(lwhdWindow);
WinDrawBitmap(lbmpBitmap, 0, 0);
WinDrawLine(0, 0, 12, 12);
lrtpFrame.topLeft.x = 0;
lrtpFrame.topLeft.y = 0;
lrtpFrame.extent.x = 22;
lrtpFrame.extent.y = 22;
WinCopyRectangle(lwhdWindow, lwhdCurrent, &lrtpFrame, 30, 20, winPaint);
// display as bitmapV3 on screen successful
WinSetDrawWindow(lwhdCurrent);
MemHandleUnlock(lmhdBitmap);
DmReleaseResource(lmhdBitmap);
}
// remove bitmapV3 resource
lintRec = DmFindResource(ldorDB, 'Tbmp', 2008, NULL);
DmRemoveResource(ldorDB, lintRec);
lintDensity = BmpGetDensity(lbmpWindow); // return 144
lintVersion = BmpGetVersion(lbmpWindow); // return 3
// get bitmap size
BmpGetSizes(lbmpWindow, &lintData, &lintHeader);
lintTotal = BmpSize(lbmpWindow);
// write bitmap to a new resource
lmhdWindow = DmNewResource(ldorDB, 'Tbmp', 2008, BmpSize(lbmpWindow));
lptrWrite = MemHandleLock(lmhdWindow);
DmWrite(lptrWrite, 0, lbmpWindow, lintHeader);
DmWrite(lptrWrite, lintHeader, BmpGetBits(lbmpWindow), lintData);
MemHandleUnlock(lmhdWindow);
DmReleaseResource(lmhdWindow);
// close file
DmCloseDatabase(ldorDB);
// free offscreen window created
WinDeleteWindow(lwhdWindow, false);
--
Season
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