--- deliantra/Deliantra-Client/DC.pm	2006/04/06 20:15:10	1.2
+++ deliantra/Deliantra-Client/DC.pm	2006/04/10 22:16:33	1.20
@@ -21,6 +21,233 @@
    XSLoader::load "Crossfire::Client", $VERSION;
 }
 
+our %GL_EXT;
+our $GL_VERSION;
+
+our $GL_NPOT;
+
+sub gl_init {
+   $GL_VERSION = gl_version * 1;
+   %GL_EXT = map +($_ => 1), split /\s+/, gl_extensions;
+
+   $GL_NPOT = $GL_EXT{GL_ARB_texture_non_power_of_two} || $GL_VERSION >= 2;
+
+   Crossfire::Client::Texture::restore_state ();
+}
+
+sub find_rcfile($) {
+   my $path;
+
+   for (@INC) {
+      $path = "$_/Crossfire/resources/$_[0]";
+      return $path if -r $path;
+   }
+
+   die "FATAL: can't find required file $_[0]\n";
+}
+
+sub read_cfg {
+   my ($file) = @_;
+
+   open CFG, $file
+      or return;
+
+   my $CFG;
+
+   local $/;
+   $CFG = eval <CFG>;
+
+   $::CFG = $CFG;
+
+   close CFG;
+}
+
+sub write_cfg {
+   my ($file) = @_;
+
+   open CFG, ">$file"
+      or return;
+
+   {
+      require Data::Dumper;
+      local $Data::Dumper::Purity = 1;
+      $::CFG->{VERSION} = $::VERSION;
+      print CFG Data::Dumper->Dump ([$::CFG], [qw/CFG/]);
+   }
+
+   close CFG;
+}
+
+package Crossfire::Client::Texture;
+
+use Scalar::Util;
+
+use SDL::OpenGL;
+
+my @textures;
+
+sub new {
+   my ($class, %data) = @_;
+
+   my $self = bless {
+      internalformat => GL_RGBA,
+      format         => GL_RGBA,
+      %data,
+   }, $class;
+
+   push @textures, $self;
+   Scalar::Util::weaken $textures[-1];
+
+   $self->upload;
+
+   $self
+}
+
+sub new_from_image {
+   my ($class, $image) = @_;
+
+   $class->new (image => $image)
+}
+
+sub new_from_file {
+   my ($class, $path) = @_;
+
+   open my $fh, "<:raw", $path
+      or die "$path: $!";
+
+   local $/;
+   $class->new_from_image (<$fh>)
+}
+
+#sub new_from_surface {
+#   my ($class, $surface) = @_;
+#
+#   $surface->rgba;
+#
+#   $class->new (
+#      data   => $surface->pixels,
+#      width  => $surface->width,
+#      height => $surface->height,
+#   )
+#}
+
+sub new_from_text {
+   my ($class, $text, $height) = @_;
+
+   my ($w, $h, $data) = Crossfire::Client::font_render $text, $height;
+
+   $class->new (
+      width          => $w,
+      height         => $h,
+      data           => $data,
+      internalformat => GL_ALPHA4,
+      format         => GL_ALPHA,
+   )
+}
+
+sub new_from_opengl {
+   my ($class, $w, $h, $cb) = @_;
+
+   $class->new (width => $w, height => $h, rendercb => $cb)
+}
+
+sub topot {
+   (grep $_ >= $_[0], 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768)[0]
+}
+
+sub upload {
+   my ($self) = @_;
+
+   return unless $SDL::App::USING_OPENGL;
+
+   my $data;
+
+   if (exists $self->{data}) {
+      $data = $self->{data};
+   } elsif (exists $self->{rendercb}) {
+      glViewport 0, 0, $self->{width}, $self->{height};
+      glMatrixMode GL_PROJECTION;
+      glLoadIdentity;
+      glOrtho 0, $self->{width}, 0, $self->{height}, -10000, 10000;
+      glMatrixMode GL_MODELVIEW;
+      glPushmatrix;
+      glLoadIdentity;
+      glClear GL_COLOR_BUFFER_BIT;
+
+      $self->{rendercb}->($self, $self->{width}, $self->{height});
+   } else {
+      my $pb = new Gtk2::Gdk::PixbufLoader;
+      $pb->write ($self->{image});
+      $pb->close;
+
+      $pb = $pb->get_pixbuf;
+      $pb = $pb->add_alpha (0, 0, 0, 0);
+
+      $self->{width}  = $pb->get_width;
+      $self->{height} = $pb->get_height;
+
+      $data = $pb->get_pixels;
+   }
+
+   my ($tw, $th) = @$self{qw(width height)};
+
+   unless ($GL_NPOT) {
+      $tw = topot $tw;
+      $th = topot $th;
+
+      if (defined $data) {
+         my $bpp = (length $data) / ($self->{width} * $self->{height});
+         $data = pack "(a" . ($tw * $bpp) . ")*",
+                    unpack "(a" . ($self->{width} * $bpp) . ")*", $data;
+         $data .= ("\x00" x ($tw * $bpp)) x ($th - $self->{height});
+      }
+   }
+
+   $self->{s} = $self->{width}  / $tw;
+   $self->{t} = $self->{height} / $th;
+
+   $self->{name} ||= (glGenTextures 1)->[0];
+
+   glBindTexture GL_TEXTURE_2D, $self->{name};
+
+   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR;
+   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR;#_MIPMAP_LINEAR;
+   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP;
+   glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP;
+   
+   glGetError;
+   if (defined $data) {
+      glTexImage2D GL_TEXTURE_2D, 0,
+                   $self->{internalformat},
+                   $tw, $th, # need to pad texture first
+                   0,
+                   $self->{format},
+                   GL_UNSIGNED_BYTE,
+                   $data;
+      glGetError and die;
+   } else {
+      glCopyTexImage2D GL_TEXTURE_2D, 0,
+                   $self->{internalformat},
+                   0, 0,
+                   $tw, $th,
+                   0;
+      glPopmatrix;
+   }
+}
+
+sub DESTROY {
+   my ($self) = @_;
+
+   return unless exists $self->{name};
+
+   glDeleteTextures delete $self->{name};
+}
+
+sub restore_state{
+   $_->upload
+      for grep $_, @textures;
+};
+
 1;
 
 =back