On 2011-12-05, at 4:51 PM, Alex <cap...@gmx.de> wrote: > Dear all! > > I would like to draw a menu like the one in the game TRAUMA (cf. > http://images.netzwelt.de/thumb/27/2011/4322/32288-test-trauma.jpg && no, I > don't want to code a game). > > So, it's basically 4 picture slides in a row. For testing purposes, I assume > my window to be 640x400. Each of the 4 pics should have 160 x 400 px. > I need to load each one of the 4 images and blit them to the surface. > > How do I do that? > > Here is what I got so far and I don't see anything else than a black screen > with 640 x 400 pixels :-s > > [code] > #!perl > > use strict; > use warnings; > use utf8; > use Data::Dumper qw/Dumper/; > use SDL; > use SDLx::Surface; > use SDL::Event; > use SDL::Events; > use SDLx::App; > use SDL::Image; > > # create our main screen > my $app = SDLx::App->new( > w => 640, > h => 400, > exit_on_quit => 1, > dt => 0.2, > title => 'SDLx Menu' > ); > > $app->update(); # make it black > > my $some_jpg_file = 'images/1-0d5ff539c7a3d166.jpg'; > my $image = SDL::Image::load( $some_jpg_file ); > > $app->blit_by( > $image, > [0, 0, 160, 400], > ); >
$app->blit(); > $app->run(); > > # -- Cleanup. > exit(0); > [/code] > > And, is it possible to extract a picture section from the image loaded? In > case the app is loaded with 4:3 aspect ratio, I would like to snip a bit of > the images at the left and the right, so that the pictures fit in without > the need of black bars at the top and the bottom of the screen. Yup this is possible. Make a smaller SDLx::Surface of the final snipped image, blit_by the original image with the right offset. > > Best regards, > Alex >
