forked from 0ad/0ad
Ykkrosh
ed38414b41
Textures: converted ARGB to ABGR. Misc: warning fixes, etc. This was SVN commit r3631.
133 lines
2.8 KiB
Perl
133 lines
2.8 KiB
Perl
use strict;
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use warnings;
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package DDS;
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sub new
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{
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my $proto = shift;
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my $class = ref($proto) || $proto;
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my $fh;
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if (ref $_[0])
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{
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$fh = $_[0];
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}
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else
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{
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open $fh, '<', $_[0] or die "Cannot open $_[0]";
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binmode $fh;
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}
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my %dds;
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$dds{dwMagic} = pack L => read_DWORD($fh);
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for (qw(Size Flags Height Width PitchOrLinearSize Depth MipMapCount))
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{
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$dds{"dw$_"} = read_DWORD($fh);
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}
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read_DWORD($fh) for 1..11; # dwReserved1
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$dds{dwFlags} = expand_flags($dds{dwFlags}, 'sd');
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$dds{ddpfPixelFormat} = read_DDPIXELFORMAT($fh);
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$dds{ddsCaps} = read_DDCAPS2($fh);
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read_DWORD($fh);# dwReserved2
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bless \%dds, $class;
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}
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sub getType
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{
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my ($self) = @_;
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if (grep $_ eq 'DDPF_RGB', @{$self->{ddpfPixelFormat}{dwFlags}})
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{
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return pack N => (
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((unpack L => 'RRRR') & $self->{ddpfPixelFormat}{dwRBitMask}) |
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((unpack L => 'GGGG') & $self->{ddpfPixelFormat}{dwGBitMask}) |
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((unpack L => 'BBBB') & $self->{ddpfPixelFormat}{dwBBitMask}) |
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((unpack L => 'AAAA') & $self->{ddpfPixelFormat}{dwRGBAlphaBitMask})
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);
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}
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elsif (grep $_ eq 'DDPF_FOURCC', @{$self->{ddpfPixelFormat}{dwFlags}})
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{
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return $self->{ddpfPixelFormat}{dwFourCC}
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}
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else
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{
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die "Unknown type";
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}
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}
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sub read_DWORD
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{
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die "Failed to read DWORD" unless (read $_[0], my $b, 4) == 4;
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return unpack L => $b;
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}
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sub read_DDPIXELFORMAT
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{
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my $r = { map +("dw$_" => read_DWORD($_[0])),
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qw(Size Flags FourCC RGBBitCount RBitMask GBitMask BBitMask RGBAlphaBitMask) };
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$r->{dwFourCC} = pack L => $r->{dwFourCC};
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$r->{dwFlags} = expand_flags($r->{dwFlags}, 'pf');
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return $r;
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}
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sub read_DDCAPS2
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{
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my $r = { map +("dw$_" => read_DWORD($_[0])),
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qw(Caps1 Caps2) };
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$r->{dwCaps1} = expand_flags($r->{dwCaps1}, 'cap1');
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$r->{dwCaps2} = expand_flags($r->{dwCaps2}, 'cap2');
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return $r;
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}
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my %flag_names = (
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sd => {
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DDSD_CAPS => 0x00000001,
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DDSD_HEIGHT => 0x00000002,
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DDSD_WIDTH => 0x00000004,
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DDSD_PITCH => 0x00000008,
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DDSD_PIXELFORMAT => 0x00001000,
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DDSD_MIPMAPCOUNT => 0x00020000,
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DDSD_LINEARSIZE => 0x00080000,
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DDSD_DEPTH => 0x00800000,
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},
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pf => {
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DDPF_ALPHAPIXELS => 0x00000001,
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DDPF_FOURCC => 0x00000004,
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DDPF_RGB => 0x00000040,
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},
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cap1 => {
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DDSCAPS_COMPLEX => 0x00000008,
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DDSCAPS_TEXTURE => 0x00001000,
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DDSCAPS_MIPMAP => 0x00400000,
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},
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cap2 => {
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DDSCAPS2_CUBEMAP => 0x00000200,
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DDSCAPS2_CUBEMAP_POSITIVEX => 0x00000400,
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DDSCAPS2_CUBEMAP_NEGATIVEX => 0x00000800,
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DDSCAPS2_CUBEMAP_POSITIVEY => 0x00001000,
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DDSCAPS2_CUBEMAP_NEGATIVEY => 0x00002000,
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DDSCAPS2_CUBEMAP_POSITIVEZ => 0x00004000,
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DDSCAPS2_CUBEMAP_NEGATIVEZ => 0x00008000,
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DDSCAPS2_VOLUME => 0x00200000,
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},
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);
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sub expand_flags
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{
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my ($n, $name) = @_;
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return [ grep $flag_names{$name}{$_} & $n, keys %{$flag_names{$name}} ];
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}
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1;
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