Hi,

if I want load a bitmap picture for extracting a small preview of it, what component or library would be best?

My goal is to use pascal only without any external lirbraries if possible. Second goal is to keep the program small, ideally avoiding to link lcl controls in.

Bitmap picture may be anything commen, JPEG, PNG, GIF, BMP, etc.

TIA,
Marc

if I want load a bitmap picture for extracting a small preview of it, what component or library would be best?

fcl-image (http://wiki.freepascal.org/fcl-image) is the basis of LCL image processing components and routines, so you can for sure use that. I use it to resize uploaded pictures in one of my web applications. TFPImageCanvas (TFPCustomCanvas to be precise) implements CopyRect which you can use for cropping. The wiki article (and the package directory) has some examples to start with.

Hi I attached a small program I just wrote that resizes an image and saves it to a file. I didn't test it but it compiles. It uses just the png reader/writer components but there are several units for different image formats.

FPReadPNG, FPWritePNG
FPReadBMP, FPWriteBMP etc.

Regards,

Andrew Haines