TifIMG 16/32 FAQs
How do I install TifIMG
16/32?
Unzip TifIMG16 or TifIMG32 with Pkzip 2.04G or equivalent. If
you have received the passworded, registered version, use the
-s option. Run the SETUP.EXE program and choose a directory. The
setup program will install DLLs in the /SYSTEM directory. See
the readme file concerning issues relating to which DLLs to supply
(and which component to use) depending on what functionality you
desire.
In DELPHI 1, go to install components, 'Add'
a component, and select the directory where you placed TifIMG.
Install TifIMG.DCU (or TifIMG.PAS if you have the registered version),
and perhaps TIFFONLY.PCU/PAS. Your Component Library will
recompile. If you get an Error 1157 (2.0 version) or "unable
to load COMPLIB.DCL" (version 1.0) message, it means Delphi
cannot find the DLLs for some reason.With other versions of Delphi,
Add the package *.bpl instead. The name will vary by version -
for instance Del5TIFF.bpl is for Delphi 5. Add the path to the
library to the environment/library path.
With the component installed, open the IMGDEMO.DPR
project to see all the functionality of TifIMG. There are right-mouse
popup menus in several places, especially on a live image to perform
special tasks. Use the Demo code to implement your own versions
of these functions.
What is error 1157 which
appears when loading the Delphi library?
Delphi 2.0 returns error 1157 when it cannot
find some part of CMPLIB32.DCL, such as the DLLs for TifIMG. The
Setup program should put them in the /System directory. Delphi
needs to find them when it loads CMPLIB32.DCL. Check SETUP.LOG
in your TifIMG directory to see where the setup program put the
DLLs.
If you get this error, it is probably because
you are using an old version and you should download a new version
of the component.
Why does my image come
up as a little dot or square?
See the RESIZE method of the IMGDEMO program. There is a function
called SetDesignedSize which tells TifIMG what the desired size
of the window is when it does a FitWindow or FitHeight function.
Also, the component needs to know the dimensions of the Scrollbox
in which it is placed (or the Panel, or whatever); this is set
by TIFFImage1.ScrollBoxW or TIFFImage1.Scroll BoxH. If these are
not set, the desired size will be a rectangle of (0,0,0,0).
How do I convert one
image format to another?
In general, you read one form in and simply set the save name
(LoadImage.SetSaveName :='myimage.pcx') and the component will
take care of it. With JPEG you get to specify a Quality number
(0..100), and with TIFF and DCX you can specify OVERWRITE to replace
an existing file or otherwise append to (or create) a file, creating
a multi-page file. If desired, right after calling LoadImage1.ImageFilename
... you can set LoadImage1.Visible :=FALSE to turn off display.
What if I want to load
the image myself, then use the Manipulate features?
Since TifIMG is a descendant of TImage, you could certainly load
the bitmap yourself. In fact, our fax product loads WinFax and
BITFAX images this way. However, if you do this you need to tell
the component that there is an image loaded and the function call
is Loadimage.Imageloaded :=TRUE. You may also need to call the
redraw method as well to force a redraw after something has changed.
How does the Pan window
work?
The pan window is a dynamic thumbnail representation of the main
image, and it can be used with any TImage, not just TifIMG. It
will allow you to control the scroll location of the main scrollbox
by means of a black rectangle on the pan window. To implement
this, look carefully at the code for the mouse events in the pan
window and the setup code for initializing it under the Create
button in the demo.
What about Expand and
Scale?
Expand is used if you have TIFF images (or CCITT images) that
were created to be standard mode fax (200 x 100) and you wish
to make them into normal resolution TIFF images (200 x 200). Scale
allows you to take an image and re-scale it (usually down) to
save space on disk. Often a 200 x 200 image (typically 1696 x
2196) can be scaled to 80% or maybe 60% with minimal loss of quality,
but considerable disk space savings. If you are doing thousands
of images, this adds up.
What DLLs do I ship
with my application?
Check the SETUP.LOG file in the installation directory to see
what files were installed in your case; it will show just what
files were installed and where. This is what UNINSTALL uses to
remove the application.
What I want to know
is ... ?
Send us your questions
and comments and we'll see what we can do for you.
See also
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