dfdutils/makevk2dfd.pl at main · KhronosGroup/dfdutils · GitHub

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#!/usr/bin/perl

# -*- tab-width: 4; -*-

# vi: set sw=2 ts=4 expandtab:

# SPDX-License-Identifier: Apache-2.0

use strict;

use warnings;

# N.B. 0 arguments, read stdin, write stdout.

# 1 argument, read ARGV[0], write stdout.

# 2 arguments, read ARGV[0], write ARGV[1].

my $infile = shift @ARGV;

my $outfile = shift @ARGV;

my $input;

if (defined $infile) {

open($input, '<', $infile);

} else {

$input = *STDIN;

}

if (defined $outfile) {

open (my $output, '>', $outfile);

select $output;

}

# Endianness is a parameter to the (non-block-compressed) generators

# This doesn't have to be a number: $bigEndian = "myBigEndianFlag" will drop this argument in the generated code

my $bigEndian = 0;

# Keep track of formats we've seen to avoid duplicates

my %foundFormats = ();

# Check if we've processed a format. Returns true for extension formats

# that have been promoted to core when the core format has been processed.

# Usually only _KHR and _EXT extensions are promoted so only those are

# checked.

sub formatProcessed {

my $format =$_[0];

my $format_noext = $format;

$format_noext =~ s/_(EXT|KHR)$//;

return (exists($foundFormats{$format})

|| exists($foundFormats{$format_noext}));

}

print "/* SPDX-", "License-Identifier: Apache-2.0 */\n\n";

print "/***************************** Do not edit. *****************************\n";

print " Automatically generated by makevk2dfd.pl.\n";

print " *************************************************************************/\n\n";

# Loop over each line of input

# IMPORTANT: Do not use `<>` as that reads all files given on the

# command line.

while (my $line = <$input>) {

# Match any format that starts with a channel description (some number of R, G, B, A or a number)

# In PERL, "=~" performs a regex operation on the left argument

# m/<regex>/ matches the regular expression

my $format = "";

my $suffix = "";

my $channels = "";

my $scheme = "";

# VK_FORMAT_ is a simple 422 format

if ($line =~ m/(VK_FORMAT_[RGBX0-9]+_422_UNORM(_4PACK16)?)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (exists($foundFormats{$format})) { next }

$foundFormats{$format} = 1;

# VK_FORMAT_G8B8G8R8_422_UNORM,

# VK_FORMAT_B8G8R8G8_422_UNORM,

# VK_FORMAT_G10X6B10X6G10X6R10X6_422_UNORM_4PACK16,

# VK_FORMAT_B10X6G10X6R10X6G10X6_422_UNORM_4PACK16,

# VK_FORMAT_G12X4B12X4G12X4R12X4_422_UNORM_4PACK16,

# VK_FORMAT_B12X4G12X4R12X4G12X4_422_UNORM_4PACK16,

# VK_FORMAT_G16B16G16R16_422_UNORM,

# VK_FORMAT_B16G16R16G16_422_UNORM,

$format =~ m/VK_FORMAT_([RGBX0-9]+)_422_UNORM(_4PACK16)?/;

my $formatChannels = $1;

my $bits = "";

my $shiftBits = "";

my $position_xs = "";

my $position_ys = "";

my $last_green = 1;

while ($formatChannels =~ m/([RGBX0-9]*)([RGB])([0-9]+)X?([0-9]+)?/) {

# Processing from right to left for ease of regex expression

my $channel = $2;

my $bit = $3;

my $padding = $4 ? $4 : "";

if ($channels ne "") {

$channels = ", " . $channels;

$bits = ", " . $bits;

$shiftBits = ", " . $shiftBits;

$position_xs = ", " . $position_xs;

$position_ys = ", " . $position_ys;

}

# The default 4:2:2 positioning is currently cosited-even.

# Block size is 2x1: Sample positions coded as 1/128 on X and 1/256 on Y

# Cosited-even:

# Position Sample

# X Y X Y

# Y0: 0.5, 0.5 -> 64, 128

# U : 0.5, 0.5 -> 64, 128

# Y1: 1.5, 0.5 -> 192, 128

# V : 0.5, 0.5 -> 64, 128

# Midpoint:

# Position Sample

# X Y X Y

# Y0: 0.5, 0.5 -> 64, 128

# U : 1.0, 0.5 -> 128, 128

# Y1: 1.5, 0.5 -> 192, 128

# V : 1.0, 0.5 -> 128, 128

if ($channel eq 'R') {

$channels = "2" . $channels; # 2 = Cr / V

$position_xs = "64" . $position_xs;

$position_ys = "128" . $position_ys;

} elsif ($channel eq 'G') {

$channels = "0" . $channels; # 0 = Y

$position_xs = ($last_green ? "192" : "64") . $position_xs;

$position_ys = "128" . $position_ys;

$last_green = 0;

} elsif ($channel eq 'B') {

$channels = "1" . $channels; # 1 = Cb / U

$position_xs = "64" . $position_xs;

$position_ys = "128" . $position_ys;

}

$bits = $bit . $bits;

if ($padding ne "") { $shiftBits = $padding . $shiftBits; }

else { $shiftBits = "0" . $shiftBits; }

$formatChannels = $1;

}

print "case $format: {\n";

print " int channels[] = {$channels}; int bits[] = {$bits}; int shiftBits[] = {$shiftBits};\n";

print " int position_xs[] = {$position_xs}; int position_ys[] = {$position_ys};\n";

print " return createDFD422($bigEndian, 4, bits, shiftBits, channels, position_xs, position_ys, s_UNORM);\n}\n";

} elsif ($line =~ m/VK_FORMAT_[RGBAE0-9]+_/) {

# Set $format to the enum identifier

($line =~ m/(VK_FORMAT[A-Z0-9_]+)/);

# $<number> holds the <number>'th parenthesised entry in the previous regex

# (only one in this case)

$format = $1;

# Skip a format if we've already processed it

if (!formatProcessed($format)) {

if ($format =~ m/_E5B9G9R9/) {

# Special case (assumed little-endian).

print "case $format: {\n";

print " int bits[] = {0}; int channels[] = {0};\n";

print " return createDFDPacked(0, 6, bits, channels, s_UFLOAT);\n";

print "}\n";

$foundFormats{$format} = 1;

} elsif ($format =~ m/_PACK/) {

# Packed formats end "_PACK<n>" - is this format packed?

# Extract the channel identifiers and suffix from the packed format

$format =~ m/VK_FORMAT_([RGBA0-9]+)_([^_]+)_PACK[0-9]+/;

# The first parenthesised bit of regex is the channels ("R5G5B5" etc.)

$channels = $1;

# The second parenthesised bit of regex is the suffix ("UNORM" etc.)

$suffix = $2;

# N.B. We don't care about the total bit count (after "PACK" in the name)

# Create an empty array of channel names and corresponding bits

my @packChannels = ();

my @packBits = ();

# Loop over channels, separating out the last letter followed by a number

while ($channels =~ m/([RGBA0-9]*)([RGBA])([0-9]+)/) {

# Add the rightmost channel name to our array

push @packChannels, $2;

# Add the rightmost channel bits to the array

push @packBits, $3;

# Truncate the channels string to remove the channel we've processed

$channels = $1;

}

# The number of channels we've found is the array length we've built

my $numChannels = @packChannels;

# Packed output needs a C block for local variables

print "case $format: {\n";

# Start with a null list of channel ids

my $channelIds = "";

# Loop over the channel names we've found

foreach (@packChannels) {

# Use a comma as a separator, so don't add it if the $channelIds string is empty

if ($channelIds ne "") { $channelIds .= ","; }

# Map the channel names to our internal numbering

if ($_ eq 'R') { $channelIds .= "0"; }

elsif ($_ eq 'G') { $channelIds .= "1"; }

elsif ($_ eq 'B') { $channelIds .= "2"; }

elsif ($_ eq 'A') { $channelIds .= "3"; }

}

# Channel bit counts are easier: we can use join() to make a comma-separated

# string of the numbers in the array

my $channelBits = join (',', @packBits);

# Print initialisation for the two arrays we've created

print " int channels[] = {" . $channelIds . "}; ";

print "int bits[] = {" . $channelBits . "};\n";

# Now print the function call and close the block

print " return createDFDPacked($bigEndian, $numChannels, bits, channels, s_$suffix);\n";

print "}\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

# If we're not packed, do we have a simple RGBA channel size list with a suffix?

# N.B. We don't want to pick up downsampled or planar formats, which have more _-separated fields

# - "$" matches the end of the format identifier

} elsif ($format =~ m/VK_FORMAT_A([0-9]+)_([^_]+)(_[^_]+)?$/) {

# Special case for alpha-only formats

# Extract our "suffix" (e.g. "UNORM") and bytes per channel

$suffix = $2;

my $bytesPerChannel = $1 / 8;

# Output the case entry

print "case $format: return createDFDAlpha($bigEndian, $bytesPerChannel, s_$suffix);\n";

} elsif ($format =~ m/VK_FORMAT_([RGBA0-9]+)_([^_]+)$/) {

# Extract our "channels" (e.g. "B8G8R8") and "suffix" (e.g. "UNORM")

$channels = $1;

$suffix = $2;

my $rbswap = 0;

my $numChannels = 0;

# Non-packed format either start with red (R8G8B8A8) or blue (B8G8R8A8)

# We have a special case to notice when we start with blue

if (substr($channels,0,1) eq "B") {

# Red and blue are swapped (B, G, R, A) - record this

# N.B. createDFDUnpacked() just knows this and R,G,B,A channel order, not arbitrary

$rbswap = 1;

# We know we saw "B" for blue, so we must also have red and green

$numChannels = 3;

# If we have "A" in the channels as well, we have four channels

if ($channels =~ m/A/) {

$numChannels = 4;

}

} else {

# We didn't start "B", so we're in conventional order (R, G, B, A)

$rbswap = 0;

# Check for the channel names present and map that to the number of channels

if ($channels =~ m/A/) {

$numChannels = 4;

} elsif ($channels =~ m/B/) {

$numChannels = 3;

} elsif ($channels =~ m/G/) {

$numChannels = 2;

} else {

$numChannels = 1;

}

# In an unpacked format, all the channels are the same size, so we only need to check one

$channels =~ m/R([0-9]+)/;

# For unpacked, we need bytes per channel, not bits

my $bytesPerChannel = $1 / 8;

# Output the case entry

print "case $format: return createDFDUnpacked($bigEndian, $numChannels, $bytesPerChannel, $rbswap, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

} elsif ($format =~ m/R16G16_SFIXED5_NV/) {

# Currently only this 2-channel SFIXED5 format exists so an

# explicit match is used.

# Output the case entry

print "case $format: return createDFDUnpacked($bigEndian, 2, 2, 0, s_SFIXED5);\n";

}

# VK_FORMAT_ is a packed HDR formats with padding

# R10X6_UNORM_PACK16

# R10X6G10X6_UNORM_2PACK16

# R10X6G10X6B10X6A10X6_UNORM_4PACK16

# R12X4_UNORM_PACK16

# R12X4G12X4_UNORM_2PACK16

# R12X4G12X4B12X4A12X4_UNORM_4PACK16

} elsif ($line =~ m/(VK_FORMAT_R10X6_UNORM_PACK16)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (!exists($foundFormats{$format})) {

$foundFormats{$format} = 1;

print "case $format: {\n";

print " int channels[] = {0}; int bits[] = {10}; int shiftBits[] = {6};\n";

print " return createDFDPackedShifted($bigEndian, 1, bits, shiftBits, channels, s_UNORM);\n}\n"

}

} elsif ($line =~ m/(VK_FORMAT_R10X6G10X6_UNORM_2PACK16)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (!exists($foundFormats{$format})) {

$foundFormats{$format} = 1;

print "case $format: {\n";

print " int channels[] = {0, 1}; int bits[] = {10, 10}; int shiftBits[] = {6, 6};\n";

print " return createDFDPackedShifted($bigEndian, 2, bits, shiftBits, channels, s_UNORM);\n}\n"

}

} elsif ($line =~ m/(VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (!exists($foundFormats{$format})) {

$foundFormats{$format} = 1;

print "case $format: {\n";

print " int channels[] = {0, 1, 2, 3}; int bits[] = {10, 10, 10, 10}; int shiftBits[] = {6, 6, 6, 6};\n";

print " return createDFDPackedShifted($bigEndian, 4, bits, shiftBits, channels, s_UNORM);\n}\n"

}

} elsif ($line =~ m/(VK_FORMAT_R12X4_UNORM_PACK16)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (!exists($foundFormats{$format})) {

$foundFormats{$format} = 1;

print "case $format: {\n";

print " int channels[] = {0}; int bits[] = {12}; int shiftBits[] = {4};\n";

print " return createDFDPackedShifted($bigEndian, 1, bits, shiftBits, channels, s_UNORM);\n}\n"

}

} elsif ($line =~ m/(VK_FORMAT_R12X4G12X4_UNORM_2PACK16)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (!exists($foundFormats{$format})) {

$foundFormats{$format} = 1;

print "case $format: {\n";

print " int channels[] = {0, 1}; int bits[] = {12, 12}; int shiftBits[] = {4, 4};\n";

print " return createDFDPackedShifted($bigEndian, 2, bits, shiftBits, channels, s_UNORM);\n}\n"

}

} elsif ($line =~ m/(VK_FORMAT_R12X4G12X4B12X4A12X4_UNORM_4PACK16)/) {

$format = $1; # Extract the format identifier from the rest of the line

if (!exists($foundFormats{$format})) {

$foundFormats{$format} = 1;

print "case $format: {\n";

print " int channels[] = {0, 1, 2, 3}; int bits[] = {12, 12, 12, 12}; int shiftBits[] = {4, 4, 4, 4};\n";

print " return createDFDPackedShifted($bigEndian, 4, bits, shiftBits, channels, s_UNORM);\n}\n"

}

# If we weren't VK_FORMAT_ plus a channel, we might be a compressed

# format, that ends "_BLOCK"

} elsif ($line =~ m/(VK_FORMAT_[A-Z0-9x_]+_BLOCK(_[A-Z]+)?)/) {

# Extract the format identifier from the rest of the line

$format = $1;

# Skip a format if we've already processed it

if (!formatProcessed($format)) {

# Special-case BC1_RGB to separate it from BC1_RGBA

if ($line =~ m/VK_FORMAT_BC1_RGB_([A-Z]+)_BLOCK/) {

# Pull out the suffix ("UNORM" etc.)

$suffix = $1;

# Output the special case - a 4x4 BC1 block

print "case $format: return createDFDCompressed(c_BC1_RGB, 4, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

# Special case BC1_RGBA (but still extract the suffix with a regex)

} elsif ($line =~ m/VK_FORMAT_BC1_RGBA_([A-Z]+)_BLOCK/) {

$suffix = $1;

print "case $format: return createDFDCompressed(c_BC1_RGBA, 4, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

# All the other BC formats don't have a channel identifier in the name, so we regex match them

} elsif ($line =~ m/VK_FORMAT_(BC(?:[2-57]|6H))_([A-Z]+)_BLOCK/) {

$scheme = $1;

$suffix = $2;

print "case $format: return createDFDCompressed(c_$scheme, 4, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

# The ETC and EAC formats have two-part names (ETC2_R8G8B8, EAC_R11 etc.) starting with "E"

} elsif ($line =~ m/VK_FORMAT_(E[^_]+_[^_]+)_([A-Z]+)_BLOCK/) {

$scheme = $1;

$suffix = $2;

print "case $format: return createDFDCompressed(c_$scheme, 4, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

# Finally, ASTC and PVRTC, the only cases where the block size is a parameter

} elsif ($line =~ m/VK_FORMAT_ASTC_([0-9]+)x([0-9]+)(x([0-9]+))?_([A-Z]+)_BLOCK(_EXT)?/) {

my $w = $1;

my $h = $2;

my $d = $4 ? $4 : '1';

$suffix = $5;

print "case $format: return createDFDCompressed(c_ASTC, $w, $h, $d, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

} elsif ($line =~ m/VK_FORMAT_PVRTC1_2BPP_([A-Z]+)_BLOCK_IMG/) {

# Pull out the suffix ("UNORM" etc.)

$suffix = $1;

# Output the special case - an 8x4 PVRTC block

print "case $format: return createDFDCompressed(c_PVRTC, 8, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

} elsif ($line =~ m/VK_FORMAT_PVRTC1_4BPP_([A-Z]+)_BLOCK_IMG/) {

# Pull out the suffix ("UNORM" etc.)

$suffix = $1;

# Output the special case - an 8x4 PVRTC block

print "case $format: return createDFDCompressed(c_PVRTC, 4, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

} elsif ($line =~ m/VK_FORMAT_PVRTC2_2BPP_([A-Z]+)_BLOCK_IMG/) {

# Pull out the suffix ("UNORM" etc.)

$suffix = $1;

# Output the special case - an 8x4 PVRTC block

print "case $format: return createDFDCompressed(c_PVRTC2, 8, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

} elsif ($line =~ m/VK_FORMAT_PVRTC2_4BPP_([A-Z]+)_BLOCK_IMG/) {

# Pull out the suffix ("UNORM" etc.)

$suffix = $1;

# Output the special case - an 8x4 PVRTC block

print "case $format: return createDFDCompressed(c_PVRTC2, 4, 4, 1, s_$suffix);\n";

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

}

} elsif ($line =~ m/(VK_FORMAT_X8_D24_UNORM_PACK32)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(24,0,4);\n";

}

} elsif ($line =~ m/(VK_FORMAT_D32_SFLOAT_S8_UINT)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(32,8,8);\n";

}

} elsif ($line =~ m/(VK_FORMAT_D16_UNORM_S8_UINT)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(16,8,4);\n";

}

} elsif ($line =~ m/(VK_FORMAT_D24_UNORM_S8_UINT)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(24,8,4);\n";

}

} elsif ($line =~ m/(VK_FORMAT_D32_SFLOAT)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(32,0,4);\n";

}

} elsif ($line =~ m/(VK_FORMAT_S8_UINT)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(0,8,1);\n";

}

} elsif ($line =~ m/(VK_FORMAT_D16_UNORM)/) {

# Extract the format identifier from the rest of the line

$format = $1;

if (!exists($foundFormats{$format})) {

# Add the format we've processed to our "done" hash

$foundFormats{$format} = 1;

print "case $format: return createDFDDepthStencil(16,0,2);\n";

}

# ...and continue to the next line

}

# vim:ai:ts=4:sts=4:sw=2:expandtab

dfdutils/makevk2dfd.pl at main · KhronosGroup/dfdutils · GitHub

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