Re: Simple Graphics Coding

"maud" <maud.july@xxxxxxxxx> wrote in message
news:b08133dd-c89d-414d-94a7-296e4a0a3ea0@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I would like to produce a number of maps with customized pushpins. I
do not need to embedded this into an application, however I need to
produce many more than I can manually construct. I was hoping someone
could recommend a simple application or programming environment to
work in. I have been thinking that if I get a background map image,
and then create a table of the pixel locations corresponding to map
locations, I would just need a program that given some sort of input
text file, created an image by placing a designated image on top of
the world map image at a designated pixel location.

It looks you don't need an application with a user interface, just an
utility. In that case the approach can be very simple. However you do need
some language or other with a library that can deal with images easily.
(With my poor knowledge in that area, I can only think of Python.)

I created the semi-pseudo code below as an example of this approach. The
library functions bmload/bmsave (wrappers around Intel's IJL library)
convert an image (it doesn't have to be jpeg) into internal form, in this
case a Windows format akin to BMP -- I believe something called a
'dib-section'.

The library function gxcopy (implemented at some deep level as Windows GDI)
is designed for bit-blitting between windows, but here works just as well
for copying pixels between images.

define inputimg = "bart01.jpg"
define pinimg = "pin.jpg"
define outputimg = "markedup.jpg"
define datafile = "locations.txt"

PROC START=

bmain:=bmload(inputimg)
if bmain=nil then stop fi

bpin:=bmload(pinimg)
if bpin=nil then stop fi

fin:=openfile(datafile)
if fin=0 then stop fi

while not eof(fin) do
readln #fin,x,y
gxcopy(bmain,bpin,x,y)
od

closefile(fin)
bmsave(bmain,outputimg)

END


--
Bartc


.

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