Bos Taurus BT_BitmapSaveFile

[Georg_BA]

Hello everyone.

I need help with a function from Bos Taurus.
If I open a PNG file
hBitmap := BT_BitmapLoadFile (cLocalTempFile) and have it saved as a JPG
BT_BitmapSaveFile (hBitmap, cLocalTempFile, BT_FILEFORMAT_JPG)
it changes my background color to black.
It is possible to set or change it somewhere

[Georg_BA]

I am attaching the files for the test

[vagblad]

Hi Georg,

The background turns to black because the png file contains a transparency layer which you cannot transfer to the .jpg format. Try this sample code if you please:

Code: Select all

Local hBitmap := NIL
Local hBitmap2 := NIL

hBitmap := BT_BitmapLoadFile("62451.png")
hbitmap2 := BT_BitmapCreateNew (BT_BitmapWidth (hBitmap), BT_BitmapHeight (hBitmap), {255,255,255})
BT_BitmapPasteTransparent (hBitmap2, 0, 0, , , BT_COPY, hBitmap, )
BT_BitmapSaveFile (hBitmap2, "new.jpg", BT_FILEFORMAT_JPG)

I hope it helps!

[Georg_BA]

Thanks for the help, but the result is the same

[gfilatov]

Thanks for the help, but the result is the same

Hi Georg,

The suggested code for conversion your PNG file is correct.
Please take a look at the attached JPG result file with white background after conversion.

[Georg_BA]

Vagelis & Grigory

Thanks for help

I went through it again, and the fault was between the chair and the computer.

Everything works correctly there is a white background

Sincerely Georg

[vagblad]

Vagelis & Grigory

Thanks for help

I went through it again, and the fault was between the chair and the computer.

Everything works correctly there is a white background

Sincerely Georg

Great!i am glad it works. And once again a big thank you to Dr. Soto for the amazing BT library

[Rathinagiri]

the fault was between the chair and the computer.