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=head1 NAME |
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|
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CFPlus::Texture - tetxure class for CFPlus |
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|
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=head1 SYNOPSIS |
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|
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use CFPlus::Texture; |
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|
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=head1 DESCRIPTION |
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|
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=over 4 |
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|
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=cut |
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|
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package CFPlus::Texture; |
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|
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use strict; |
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|
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use List::Util qw(max min); |
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use CFPlus::OpenGL; |
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|
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my %TEXTURES; |
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my ($MAX_W, $MAX_H) = (4096, 4096); # maximum texture size attempted by this module |
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|
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sub new { |
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my ($class, %data) = @_; |
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|
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my $self = bless { |
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internalformat => GL_RGBA, |
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format => GL_RGBA, |
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type => GL_UNSIGNED_BYTE, |
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%data, |
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}, $class; |
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|
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CFPlus::weaken ($TEXTURES{$self+0} = $self); |
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|
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$self->upload; |
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|
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$self |
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} |
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|
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sub new_from_image { |
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my ($class, $image, %arg) = @_; |
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|
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$class->new (image => $image, internalformat => undef, %arg) |
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} |
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|
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sub new_from_file { |
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my ($class, $path, %arg) = @_; |
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|
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open my $fh, "<:raw", $path |
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or die "$path: $!"; |
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|
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local $/; |
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$class->new_from_image (<$fh>, %arg) |
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} |
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|
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#sub new_from_surface { |
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# my ($class, $surface) = @_; |
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# |
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# $surface->rgba; |
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# |
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# $class->new ( |
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# data => $surface->pixels, |
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# w => $surface->width, |
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# h => $surface->height, |
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# ) |
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#} |
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|
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#sub new_from_layout { |
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# my ($class, $layout, %arg) = @_; |
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# |
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# my ($w, $h, $data, $format, $internalformat) = $layout->render; |
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# |
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# $class->new ( |
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# w => $w, |
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# h => $h, |
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# data => $data, |
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# format => $format, |
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# internalformat => $format, |
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# type => GL_UNSIGNED_BYTE, |
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# %arg, |
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# ) |
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#} |
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|
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sub new_from_opengl { |
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my ($class, $w, $h, $cb) = @_; |
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|
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$class->new (w => $w || 1, h => $h || 1, render_cb => $cb, nearest => 1) |
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} |
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|
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sub upload { |
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my ($self) = @_; |
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|
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return unless $GL_VERSION; |
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|
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# $tw,$th texture |
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# $rw,$rh rendered/used size |
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# $dw,$dh $data |
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|
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my ($data, $dw, $dh); |
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|
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if (exists $self->{data}) { |
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$data = $self->{data}; |
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($dw, $dh) = @$self{qw(w h)}; |
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|
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} elsif (exists $self->{render_cb}) { |
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($dw, $dh) = @$self{qw(w h)}; |
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|
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} else { |
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($self->{w}, $self->{h}, $data, my $internalformat, $self->{format}, $self->{type}) |
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= CFPlus::load_image_inline $self->{image}; |
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|
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$self->{internalformat} ||= $internalformat; |
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($dw, $dh) = @$self{qw(w h)}; |
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} |
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|
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my ($tw, $th) = ($dw, $dh); |
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my ($rw, $rh) = ($dw, $dh); |
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|
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defined $data or $self->{render_cb} or die; # some sanity check |
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|
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$self->{minified} ||= [CFPlus::average $dw, $dh, $data] |
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if $self->{minify}; |
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|
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# against rather broken cards we enforce a maximum texture size |
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$tw = min $MAX_W, minpot $tw; |
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$th = min $MAX_H, minpot $th; |
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|
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# if only pot-textures are allowed, pot'ify tw/th |
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unless ($GL_NPOT && 0) {#d# |
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$tw = minpot $tw; |
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$th = minpot $th; |
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} |
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|
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# now further decrease texture size until the |
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# card does accept it |
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while (!texture_valid_2d $self->{internalformat}, $tw, $th, $self->{format}, $self->{type}) { |
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# quarter the texture size |
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$tw >>= 1; |
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$th >>= 1; |
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} |
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|
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if ($self->{render_cb}) { |
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# use only part of the texture |
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#$rw >>= 1 while $rw > $tw; |
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#$rh >>= 1 while $rh > $th; |
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$rw = min $rw, $tw; |
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$rh = min $rh, $th; |
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} else { |
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if ($self->{wrap} || $tw < $dw || $th < $dh) { |
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# scale to the full texture size |
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($rw, $rh) = ($tw, $th); |
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} else { |
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# pad |
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pad $data, $dw, $dh, $tw, $th; |
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($rw, $rh) = ($dw, $dh); |
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($dw, $dh) = ($tw, $th); |
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} |
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} |
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|
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# rendering means we need to scale in some way |
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my $render = $self->{render_cb} || $rw != $dw || $th != $dh; |
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|
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if ($render) { |
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glViewport 0, 0, $tw, $th; |
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glClear 0, 0, 0, 0; |
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glMatrixMode GL_PROJECTION; |
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glLoadIdentity; |
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glOrtho 0, $tw, 0, $th, -10000, 10000; |
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glMatrixMode GL_MODELVIEW; |
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glLoadIdentity; |
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|
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if ($self->{render_cb}) { |
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glScale $rw / $dw, $rh / $dh; |
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$self->{render_cb}->($self, $rw, $rh); |
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} else { |
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glPixelZoom $tw / $dw, $th / $dh; |
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glDrawPixels $dw, $dh, |
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$self->{format}, |
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$self->{type}, |
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$data; |
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glPixelZoom 1, 1; |
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} |
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} |
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|
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glBindTexture GL_TEXTURE_2D, $self->{name} ||= glGenTexture; |
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|
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if ($self->{wrap}) { |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT; |
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} else { |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, $GL_VERSION >= 1.2 ? GL_CLAMP_TO_EDGE : GL_CLAMP; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, $GL_VERSION >= 1.2 ? GL_CLAMP_TO_EDGE : GL_CLAMP; |
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} |
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|
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if ($::FAST || $self->{nearest}) { |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST; |
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} elsif ($self->{mipmap} && $GL_VERSION >= 1.4) { |
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glTexParameter GL_TEXTURE_2D, GL_GENERATE_MIPMAP, 1; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR; |
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} else { |
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glTexParameter GL_TEXTURE_2D, GL_GENERATE_MIPMAP, $self->{mipmap}; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR; |
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glTexParameter GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR; |
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} |
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|
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glGetError; |
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|
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if ($render) { |
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glCopyTexImage2D GL_TEXTURE_2D, 0, |
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$self->{internalformat}, |
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0, 0, |
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$tw, $th, |
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0; |
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gl_check "copying to texture %dx%d if=%x", |
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$tw, $th, $self->{internalformat}; |
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} else { |
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glTexImage2D GL_TEXTURE_2D, 0, |
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$self->{internalformat}, |
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$dw, $dh, |
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0, |
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$self->{format}, |
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$self->{type}, |
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$data; |
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gl_check "uploading texture %dx%d if=%x f=%x t=%x", |
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$tw, $th, $self->{internalformat}, $self->{format}, $self->{type}; |
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} |
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|
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$self->{s} = $rw / $tw; |
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$self->{t} = $rh / $th; |
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} |
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|
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sub shutdown { |
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my ($self) = @_; |
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|
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glDeleteTexture $self->{name} |
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if $self->{name}; |
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} |
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|
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sub DESTROY { |
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my ($self) = @_; |
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|
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delete $TEXTURES{$self+0}; |
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|
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$self->shutdown; |
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} |
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|
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$CFPlus::OpenGL::INIT_HOOK{"CFPlus::Texture"} = sub { |
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# first mark all existing texture names as in-use, in case the context lost textures |
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glBindTexture GL_TEXTURE_2D, $_->{name} |
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for values %TEXTURES; |
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$_->upload |
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for values %TEXTURES; |
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}; |
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|
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$CFPlus::OpenGL::SHUTDOWN_HOOK{"CFPlus::Texture"} = sub { |
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$_->shutdown |
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for values %TEXTURES; |
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}; |
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|
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1; |
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|
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=back |
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|
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=head1 AUTHOR |
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|
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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|
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=cut |
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|
