Luis Antonio wrote in message
\nnews:7ksu6u$
\nc3l14@forums.borland.com… <\/p>\n
> Hello: use a code like this:<\/p>\n [code lang=”delphi”]function j.savetofile(‘c:\\sal\\n’+inttostr(n)+’p’+inttostr(p)+’p’+inttostr(ay)+’.’+int [tags]Delphi, Graphic[\/tags]<\/p>\n","protected":false},"excerpt":{"rendered":" Luis Antonio wrote in message news:7ksu6u$ c3l14@forums.borland.com… > Hello: > > I’m making a cartographic program that use an TImage with an >…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[11],"tags":[75,101],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p71Tml-2w","_links":{"self":[{"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/posts\/156"}],"collection":[{"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/comments?post=156"}],"version-history":[{"count":0,"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/posts\/156\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/media?parent=156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/categories?post=156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nsonic.de\/blog\/wp-json\/wp\/v2\/tags?post=156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n>
\n> I’m making a cartographic program that use an TImage with an
\n> cartographic map image in jpeg format as background. This map is inside a
\n> scrollbox because is 3500 x 906 pixels (900 Kb) or 6890 x 1790 (3819 Kb).
\nBy
\n> its quality the second is preferable.
\n>
\n> The user will be able to move the map arround, will be able to
\nmake
\n> searches and will be able to move the mouse over the cities and to know
\n> information about them. By these reasons the program will have to be
\nfaster
\n> and agile.
\n>
\n> Could somebody advise some component to me better than TImage?
\nSome
\n> other advise?
\n>
\n> Thanks in advance:
\n>
\n> —————–
\n> Luis Antonio
\n>
\n<\/em>
\nHi. I have the same problem with images that use 15Mg, you need to make a
\nprogram that cut the jpeg in (for example) 6×10 jpeg files.
\nThen READ ALL the new jpegs. The diferent is that the pc will need less
\nmemory to descompress the images, and it will be very faster.
\n
\nWhen i do this i pass, from 60 seconds to load the bigimage, to 4 seconds.
\nYou need to test in how many parts cut it.<\/p>\n
\nconst
\n cx=3;
\n cy=6;
\nvar
\n xx,yy,ax,ay,n,p:integer;
\n j:tjpegimage;
\n b,bs:tbitmap;
\nbegin
\n dt:=now;
\n j:=tjpegimage.create;
\n b:=tbitmap.create;
\n bs:=tbitmap.create;
\n for n:=1 to 20 do
\n begin
\n j.LoadFromFile();
\n b.assign(j); {you need to assign it to a bitmap, so you can work on
\nit}
\n xx:=b.width div cx;
\n yy:=b.height div cy;
\n bs.width:=xx; bs.height:=yy;
\n for ax:=0 to cx-1 do
\n for ay:=0 to cy-1 do
\n begin
\n bs.canvas.draw(-xx*ax,-yy*ay,b);
\n j.Assign(bs);<\/p>\n
\ntostr(ax));
\n end;
\n end;
\n b.free;
\n bs.free;
\n j.free;
\nend;
\n[\/code]
\nIf it’s slowly, you can only read the parts that the user is seeing, plus
\nthe corners.<\/p>\n