libraries/libdraco: Added (3D data compression).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

libraries/libdraco/README

@@ -0,0 +1,12 @@
+Draco is a library for compressing and decompressing 3D geometric
+meshes and point clouds. It is intended to improve the storage and
+transmission of 3D graphics.
+
+Draco was designed and built for compression efficiency and speed. The
+code supports compressing points, connectivity information, texture
+coordinates, color information, normals, and any other generic
+attributes associated with geometry.
+
+Draco is supported as optional dependency by applications that can take
+advantage by strong compression of 3D graphics (Blender, qgis, pdal,
+for example).

libraries/libdraco/gltf_decoder_cc.patch

@@ -0,0 +1,23 @@
+--- ./src/draco/io/gltf_decoder.cc
++++ ./src/draco/io/gltf_decoder.cc
+@@ -427,6 +427,12 @@
+   return WriteBufferToFile(contents.data(), contents.size(), filepath);
+ }
+ 
++bool GetFileSizeInBytes(size_t *out, std::string * /*err*/,
++                     const std::string &filepath, void * /*user_data*/) {
++  *out = GetFileSize(filepath);
++  return true;
++}
++
+ }  // namespace
+ 
+ GltfDecoder::GltfDecoder()
+@@ -486,6 +492,7 @@
+       // TinyGLTF's ExpandFilePath does not do filesystem i/o, so it's safe to
+       // use in all environments.
+       &tinygltf::ExpandFilePath, &ReadWholeFile, &WriteWholeFile,
++      &GetFileSizeInBytes,
+       reinterpret_cast<void *>(input_files)};
+ 
+   loader.SetFsCallbacks(fs_callbacks);

libraries/libdraco/gltf_utils_h.patch

@@ -0,0 +1,10 @@
+--- ./src/draco/io/gltf_utils.h	2023-02-07 18:30:00.000000000 +0100
++++ ./src/draco/io/gltf_utils.h	2023-11-10 19:04:39.726881566 +0100
+@@ -21,6 +21,7 @@
+ #include <iomanip>
+ #include <sstream>
+ #include <string>
++#include <cstdint>
+ 
+ namespace draco {
+ 

libraries/libdraco/libdraco.SlackBuild

@@ -0,0 +1,120 @@
+#!/bin/bash
+
+# Slackware build script for libdraco
+
+# Copyright 2023 Giancarlo Dessì, Cagliari, IT
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=libdraco
+SRCNAM=draco
+VERSION=${VERSION:-1.5.6}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $SRCNAM-$VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
+cd $SRCNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+sed -i -e 's:FindPythonInterp:FindPython3:g' CMakeLists.txt
+
+# Fix build errors in the source against gltf so allow the support to
+# TRANSCODER. Thanks to Timo Röhling maintainer of draco package for Ubuntu
+# https://answers.launchpad.net/ubuntu/+source/draco/1.5.6+dfsg-3
+patch -p1 < $CWD/gltf_decoder_cc.patch
+
+# Fix build errors with gcc 13 on Slackware current,
+# not needed on Slackware 15.0
+if [ -f /usr/bin/gcc-13* ]; then
+  patch -p1 < $CWD/gltf_utils_h.patch
+fi
+
+mkdir -p build
+cd build
+  cmake \
+    -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    -DDRACO_TRANSCODER_SUPPORTED=ON \
+    -DDRACO_EIGEN_PATH=/usr/include/eigen3 \
+    -DDRACO_FILESYSTEM_PATH=/usr/include \
+    -DCMAKE_BUILD_TYPE=Release ..
+  make
+  make install/strip DESTDIR=$PKG
+cd ..
+
+rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a AUTHORS CONTRIBUTING.md README.md LICENSE $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE

libraries/libdraco/libdraco.info

@@ -0,0 +1,10 @@
+PRGNAM="libdraco"
+VERSION="1.5.6"
+HOMEPAGE="https://google.github.io/draco/"
+DOWNLOAD="https://github.com/google/draco/archive/1.5.6/draco-1.5.6.tar.gz"
+MD5SUM="dbe3a9e286ee5b79016470349d78b2a3"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="ghc_filesystem tinygltf"
+MAINTAINER="Giancarlo Dessi"
+EMAIL="slack@giand.it"

libraries/libdraco/slack-desc

@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+        |-----handy-ruler------------------------------------------------------|
+libdraco: libdraco (3D graphics data compression)
+libdraco:
+libdraco: Draco is a library for compressing and decompressing 3D geometric
+libdraco: meshes and point clouds. It is intended to improve the storage
+libdraco: and transmission of 3D graphics.
+libdraco:
+libdraco: Home page: https://google.github.io/draco/
+libdraco:
+libdraco:
+libdraco:
+libdraco: