From bcbc5632e38a51a2dc9e31b87746640754d33c2e Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Fri, 28 Jun 2024 19:13:28 +0200
Subject: [PATCH 1/8] cmake: disable LTO by default

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dba76ea1..9995f4af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,7 +66,7 @@ option(BUILD_EXAMPLES "Build examples" OFF)
 # Enable extra optimization flags, like using -O3 even in RelWithDebInfo build.
 option(USE_EXTRA_OPTIMIZATION "Enable extra optimization" ON)
 # Enable link time optimization, slows down the build but produce faster and smaller binaries.
-option(USE_LTO "Enable link-time optimization" ON)
+option(USE_LTO "Enable link-time optimization" OFF)
 # Enabling fast math makes generated images less likely to be reproducible.
 # See https://github.com/DaemonEngine/crunch/issues/29
 option(USE_FAST_MATH "Enable fast math (generated images are less likely to be reproducible)" ON)

From 7bf66f04a3b6a3af3cbb98bd30a88edc38eb8ea2 Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Tue, 2 Jul 2024 23:45:52 +0200
Subject: [PATCH 2/8] cmake: bump required cmake version to silence deprecation
 warning

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9995f4af..f5eb7032 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 set(CMAKE_CXX_STANDARD 11)
 

From 85a2f770ca05a4a2da95340cc2ed2d472ac9f7f2 Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Wed, 3 Jul 2024 00:47:43 +0200
Subject: [PATCH 3/8] cmake: this is a C++-only project

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5eb7032..e8a0304d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@ set(CRUNCH_PROJECT_NAME crunch)
 set(CRUNCH_LIBRARY_NAME crn)
 set(CRUNCH_EXE_NAME crunch)
 
-project(${CRUNCH_PROJECT_NAME})
+project(${CRUNCH_PROJECT_NAME} LANGUAGES CXX)
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
 

From 30e4a49cfa8e4d0059db565b19a9c9d0de7a8f99 Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Wed, 3 Jul 2024 01:08:13 +0200
Subject: [PATCH 4/8] emscripten: add build scripts

---
 .gitignore                |  4 +++-
 emscripten/CMakeLists.txt | 28 ++++++++++++++++++++++++++++
 emscripten/Makefile       | 17 +++++++++++++++++
 3 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 emscripten/CMakeLists.txt
 create mode 100644 emscripten/Makefile

diff --git a/.gitignore b/.gitignore
index 7d6843b3..62df287e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
 *.o
+*.js
+*.wasm
 *.2010.vcxproj.user
 *.2010.suo
 /crnlib/crunch
@@ -15,4 +17,4 @@
 /lib
 /bin/*
 !bin/crunch_x64.exe
-/build
+build*
diff --git a/emscripten/CMakeLists.txt b/emscripten/CMakeLists.txt
new file mode 100644
index 00000000..1344bbf1
--- /dev/null
+++ b/emscripten/CMakeLists.txt
@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.5)
+
+set(CMAKE_CXX_STANDARD 11)
+
+set(CRUNCHJS_EXE_NAME crunch)
+
+if (NOT CMAKE_CXX_COMPILER)
+	set(CMAKE_CXX_COMPILER emcc)
+endif()
+
+project(${CRUNCHJS_EXE_NAME}.js LANGUAGES CXX)
+
+if (NOT CMAKE_TOOLCHAIN_FILE)
+	set(CMAKE_EXECUTABLE_SUFFIX .js)
+endif()
+
+set(CMAKE_CXX_FLAGS "-O3 ${CMAKE_CXX_FLAGS}")
+set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s EXPORTED_FUNCTIONS=\"['_malloc', '_free', '_crn_get_width', '_crn_get_height', '_crn_get_levels', '_crn_get_dxt_format', '_crn_get_bytes_per_block', '_crn_get_uncompressed_size', '_crn_decompress']\" -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1 -s ELIMINATE_DUPLICATE_FUNCTIONS=1 -s ALLOW_MEMORY_GROWTH=1 --memory-init-file 0")
+
+include_directories(
+	${CMAKE_CURRENT_SOURCE_DIR}/../inc
+)
+
+set(CRUNCHJS_SRCS
+	${CMAKE_CURRENT_SOURCE_DIR}/crunch_lib.cpp
+)
+
+add_executable(${CRUNCHJS_EXE_NAME} ${CRUNCHJS_SRCS})
diff --git a/emscripten/Makefile b/emscripten/Makefile
new file mode 100644
index 00000000..598a9ffb
--- /dev/null
+++ b/emscripten/Makefile
@@ -0,0 +1,17 @@
+.DEFAULT_GOAL := all
+.PHONY: all clean
+
+CXX = emcc
+
+COMPILE_OPTIMIZATION_OPTIONS = -O3
+COMPILE_OPTIONS = -std=c++11 ${COMPILE_OPTIMIZATION_OPTIONS}
+
+LINKER_OPTIONS = -s EXPORTED_FUNCTIONS="['_malloc', '_free', '_crn_get_width', '_crn_get_height', '_crn_get_levels', '_crn_get_dxt_format', '_crn_get_bytes_per_block', '_crn_get_uncompressed_size', '_crn_decompress']" -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1 -s ELIMINATE_DUPLICATE_FUNCTIONS=1 -s ALLOW_MEMORY_GROWTH=1 --memory-init-file 0
+
+all: crunch.js
+
+crunch.js: crunch_lib.cpp
+	$(CXX) $< -o $@ -I../inc $(COMPILE_OPTIONS) $(LINKER_OPTIONS)
+
+clean:
+	rm crunch.js crunch.wasm

From c5abbd0bda9f2967d6584cb121a75ad425eaa93e Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Wed, 3 Jul 2024 17:51:01 +0200
Subject: [PATCH 5/8] test: add test images and scripts

Except black.jpg and unvanquished_64.png, the test images come from:

- https://github.com/UnvanquishedAssets/UnvanquishedTestAssets/tree/master/pkg/map-test-pngalpha_src.dpkdir/textures/test-pngalpha_custom_src
- https://gitlab.com/illwieckz/investigating-tga-orientation-in-imagemagick/-/tree/master/samples-default
- https://gitlab.com/illwieckz/investigating-tga-orientation-in-imagemagick/-/tree/master/samples

I'm the author of all of them and I place them under CC0 1.0 (public domain).
---
 test/black.jpg                  | Bin 0 -> 172 bytes
 test/raw-bottom-left.tga        | Bin 0 -> 4156 bytes
 test/raw-bottom-right.tga       | Bin 0 -> 4157 bytes
 test/raw-top-left.tga           | Bin 0 -> 4153 bytes
 test/raw-top-right.tga          | Bin 0 -> 4154 bytes
 test/sample-default.bmp         | Bin 0 -> 4234 bytes
 test/sample-vertical-flip.bmp   | Bin 0 -> 4234 bytes
 test/test-colormap1-alpha1.png  | Bin 0 -> 432 bytes
 test/test-colormap2-alpha1.png  | Bin 0 -> 454 bytes
 test/test-colormap4-alpha1.png  | Bin 0 -> 486 bytes
 test/test-colormap8-alpha1.png  | Bin 0 -> 4726 bytes
 test/test-grayscale1-alpha1.png | Bin 0 -> 415 bytes
 test/test-grayscale1-alpha8.png | Bin 0 -> 5720 bytes
 test/test-grayscale8-alpha1.png | Bin 0 -> 2833 bytes
 test/test-rgb8-alpha8.png       | Bin 0 -> 10798 bytes
 test/test.py                    | 101 ++++++++++++++++++++++++++++++++
 test/unvanquished_64.png        | Bin 0 -> 7471 bytes
 17 files changed, 101 insertions(+)
 create mode 100644 test/black.jpg
 create mode 100644 test/raw-bottom-left.tga
 create mode 100644 test/raw-bottom-right.tga
 create mode 100644 test/raw-top-left.tga
 create mode 100644 test/raw-top-right.tga
 create mode 100644 test/sample-default.bmp
 create mode 100644 test/sample-vertical-flip.bmp
 create mode 100644 test/test-colormap1-alpha1.png
 create mode 100644 test/test-colormap2-alpha1.png
 create mode 100644 test/test-colormap4-alpha1.png
 create mode 100644 test/test-colormap8-alpha1.png
 create mode 100644 test/test-grayscale1-alpha1.png
 create mode 100644 test/test-grayscale1-alpha8.png
 create mode 100644 test/test-grayscale8-alpha1.png
 create mode 100644 test/test-rgb8-alpha8.png
 create mode 100755 test/test.py
 create mode 100644 test/unvanquished_64.png

diff --git a/test/black.jpg b/test/black.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..5b62d451c141275cd23e63b47797139fa1aa3704
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literal 0
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diff --git a/test/raw-bottom-left.tga b/test/raw-bottom-left.tga
new file mode 100644
index 0000000000000000000000000000000000000000..2bdf4cdd88a4473ab57cc06543ae2eeb8ee3fb22
GIT binary patch
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new file mode 100644
index 0000000000000000000000000000000000000000..da013ec25aba6c29ab04d362128d2459899d53d8
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new file mode 100644
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new file mode 100644
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diff --git a/test/sample-default.bmp b/test/sample-default.bmp
new file mode 100644
index 0000000000000000000000000000000000000000..068d10c22eff814edb36d507525dd2ab1d9f55fd
GIT binary patch
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diff --git a/test/test.py b/test/test.py
new file mode 100755
index 00000000..ccbb84cf
--- /dev/null
+++ b/test/test.py
@@ -0,0 +1,101 @@
+#! /usr/bin/env python3
+
+import os
+import subprocess
+import sys
+
+def print_command(command_list):
+    print("running: " + " ".join(command_list), file=sys.stderr)
+
+def convert_path(path):
+    return path.replace("/", os.path.sep)
+
+def run(command_list):
+    print_command(command_list)
+    returncode = subprocess.run(command_list).returncode
+    if returncode:
+        exit(returncode)
+
+def mkdir(path):
+    print_command(["mkdir", path])
+    os.makedirs(path, exist_ok=True)
+
+def crunch(input_path, output_path, options=[]):
+    executable_extension = ["", ".exe"][sys.platform == 'win32']
+    executable_name = "crunch" + executable_extension
+
+    build_dir = "build"
+    windows_build_dir = os.path.join(build_dir, "Release")
+    if os.path.exists(windows_build_dir):
+        build_dir = windows_build_dir
+
+    executable_path = os.path.join(build_dir, executable_name)
+    command_list = [executable_path] + options
+
+    if input_path:
+        input_path = convert_path(input_path)
+        output_path = convert_path(output_path)
+        command_list += ["-file", input_path, "-out", output_path]
+
+    run(command_list)
+
+crunch(None, None, ["--help"])
+
+mkdir("build/test/0")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.crn")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.dds")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.ktx")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.tga")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.bmp")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.png")
+crunch("test/unvanquished_64.png", "build/test/0/unvanquished_64.jpg")
+
+mkdir("build/test/1")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.crn")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.dds")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.ktx")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.tga")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.bmp")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.png")
+crunch("build/test/0/unvanquished_64.crn", "build/test/1/unvanquished_64.jpg")
+
+mkdir("build/test/2")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.crn")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.dds")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.ktx")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.tga")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.bmp")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.png")
+crunch("build/test/0/unvanquished_64.dds", "build/test/2/unvanquished_64.jpg")
+
+mkdir("build/test/3")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.crn")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.dds")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.ktx")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.tga")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.bmp")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.png")
+crunch("build/test/0/unvanquished_64.ktx", "build/test/3/unvanquished_64.jpg")
+
+mkdir("build/test/4")
+crunch("test/raw-bottom-left.tga", "build/test/4/raw-bottom-left.crn")
+crunch("test/raw-bottom-right.tga", "build/test/4/raw-bottom-right.crn")
+crunch("test/raw-top-left.tga", "build/test/4/raw-top-left.crn")
+crunch("test/raw-top-right.tga", "build/test/4/raw-top-right.crn")
+
+mkdir("build/test/5")
+crunch("test/test-colormap1-alpha1.png", "build/test/5/test-colormap1-alpha1.crn")
+crunch("test/test-colormap2-alpha1.png", "build/test/5/test-colormap2-alpha1.crn")
+crunch("test/test-colormap4-alpha1.png", "build/test/5/test-colormap4-alpha1.crn")
+crunch("test/test-colormap8-alpha1.png", "build/test/5/test-colormap8-alpha1.crn")
+crunch("test/test-grayscale1-alpha1.png", "build/test/5/test-grayscale1-alpha1.crn")
+crunch("test/test-grayscale1-alpha8.png", "build/test/5/test-grayscale1-alpha8.crn")
+crunch("test/test-grayscale8-alpha1.png", "build/test/5/test-grayscale8-alpha1.crn")
+crunch("test/test-rgb8-alpha8.png", "build/test/5/test-rgb8-alpha8.crn")
+
+mkdir("build/test/6")
+crunch("test/sample-default.bmp", "build/test/6/sample-default.crn")
+crunch("test/sample-vertical-flip.bmp", "build/test/6/sample-vertical-flip.crn")
+
+mkdir("build/test/7")
+crunch("test/black.jpg", "build/test/7/black.crn")
diff --git a/test/unvanquished_64.png b/test/unvanquished_64.png
new file mode 100644
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HcmV?d00001


From 4a5c8d22bbc3cddd9591d6c6d444ee98a404c28e Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Mon, 24 Jun 2024 12:01:32 +0200
Subject: [PATCH 6/8] ci/azure: test building Linux, MinGW and macOS

---
 .azure-pipelines.yml | 127 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 .azure-pipelines.yml

diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
new file mode 100644
index 00000000..a1579f15
--- /dev/null
+++ b/.azure-pipelines.yml
@@ -0,0 +1,127 @@
+# Documentation: https://wiki.unvanquished.net/wiki/Continuous_integration
+
+trigger:
+  branches:
+    include:
+      - master
+
+pr:
+  branches:
+    include:
+      - '*'
+  paths:
+    include:
+      - .azure-pipelines.yml
+      # The rest of this list should stay in sync with .appveyor.yml
+      - crunch/
+      - crnlib/
+      - inc/
+      - example1/
+      - example2/
+      - example3/
+      - test/
+      - cmake/
+      - CMakeLists.txt
+
+strategy:
+  matrix:
+    Linux amd64 GCC:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build g++-8
+      CXX_COMPILER: g++-8
+      RUN_TESTS: true
+    Linux i686 GCC:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build g++-i686-linux-gnu
+      CXX_COMPILER: i686-linux-gnu-g++
+      RUN_TESTS: true
+    Linux arm64 GCC:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build g++-aarch64-linux-gnu
+      CXX_COMPILER: aarch64-linux-gnu-g++
+    Linux armhf GCC:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build g++-arm-linux-gnueabihf
+      CXX_COMPILER: arm-linux-gnueabihf-g++
+    Linux amd64 Clang:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build
+      CXX_COMPILER: clang++
+      RUN_TESTS: true
+    Windows amd64 MinGW:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build g++-mingw-w64-x86-64 mingw-w64-x86-64-dev
+      SETUP_COMMANDS: sudo update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix
+      TOOLCHAIN_FILE: cmake/cross-toolchain-mingw64.cmake
+      BUILD_EXAMPLES: ON
+      EXE_EXTENSIONS: .exe
+    Windows i686 MinGW:
+      VM_IMAGE: 'ubuntu-20.04'
+      APT_PACKAGES: ninja-build g++-mingw-w64-i686 mingw-w64-i686-dev
+      SETUP_COMMANDS: sudo update-alternatives --set i686-w64-mingw32-g++ /usr/bin/i686-w64-mingw32-g++-posix
+      TOOLCHAIN_FILE: cmake/cross-toolchain-mingw32.cmake
+      BUILD_EXAMPLES: ON
+      EXE_EXTENSIONS: .exe
+    macOS amd64 AppleClang:
+      VM_IMAGE: 'macOS-12'
+      CMAKE_GENERATOR: Unix Makefiles
+      NPROC_COMMAND: sysctl -n hw.logicalcpu
+      RUN_TESTS: true
+    macOS arm64 AppleClang:
+      VM_IMAGE: 'macOS-12'
+      CMAKE_GENERATOR: Unix Makefiles
+      COMPILER_FLAGS: -target arm64-apple-macos11 -Wno-overriding-t-option
+      NPROC_COMMAND: sysctl -n hw.logicalcpu
+    Web Asm.js Emscripten:
+      VM_IMAGE: 'ubuntu-22.04'
+      APT_PACKAGES: ninja-build emscripten
+      TOOLCHAIN_FILE: /usr/share/emscripten/cmake/Modules/Platform/Emscripten.cmake
+      SOURCE_DIR: emscripten
+      EXE_EXTENSIONS: .js .wasm
+
+pool:
+  vmImage: $(VM_IMAGE)
+
+steps:
+- bash: |
+    set -xue
+    if [ -n "${APT_PACKAGES:-}" ]; then
+      sudo apt-get update && sudo apt-get -y -q --no-install-recommends install ${APT_PACKAGES}
+    fi
+    if [ -n "${SETUP_COMMANDS:-}" ]; then
+     $(SETUP_COMMANDS)
+    fi
+  displayName: 'Setup'
+- bash: |
+    set -xue
+    export CMAKE_BUILD_PARALLEL_LEVEL="$(${NPROC_COMMAND:-nproc})"
+    echo "${CMAKE_BUILD_PARALLEL_LEVEL}"
+    cmake_args=(-G"${CMAKE_GENERATOR:-Ninja}")
+    if [ -n "${TOOLCHAIN_FILE:-}" ]; then
+        cmake_args+=(-DCMAKE_TOOLCHAIN_FILE="${TOOLCHAIN_FILE}")
+    fi
+    if [ -n "${CXX_COMPILER:-}" ]; then
+        cmake_args+=(-DCMAKE_CXX_COMPILER="${CXX_COMPILER}")
+    fi
+    if [ -n "${COMPILER_FLAGS:-}" ]; then
+        cmake_args+=(-DCMAKE_CXX_FLAGS="${COMPILER_FLAGS}")
+    fi
+    if [ -z "${SOURCE_DIR:-}" ]; then
+        cmake_args+=(-DBUILD_CRUNCH=ON -DBUILD_SHARED_LIBCRN=ON -DBUILD_EXAMPLES="${BUILD_EXAMPLES:-OFF}")
+    fi
+    cmake -S"${SOURCE_DIR:-.}" -Bbuild "${cmake_args[@]}"
+    cmake --build build --config Release
+  displayName: 'Build'
+- bash: |
+    set -xue
+    if [ -z "${EXE_EXTENSIONS:-}" ]; then
+      file 'build/crunch'
+    else
+      for ext in ${EXE_EXTENSIONS}; do
+        file "build/crunch${ext}"
+      done
+    fi
+    if "${RUN_TESTS:-false}"; then
+      test/test.py
+    fi
+  displayName: 'Test'

From 115021dea3d14d4bf0c2e69fdccbf4075b792c5f Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Fri, 28 Jun 2024 20:02:28 +0200
Subject: [PATCH 7/8] ci/appveyor: run test

---
 .appveyor.yml | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/.appveyor.yml b/.appveyor.yml
index 78b2e0bb..283e75ff 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -5,13 +5,14 @@ skip_branch_with_pr: true
 only_commits:
   files:
     - .appveyor.yml
-    - example1/
-    - example2/
-    - example3/
     # The rest of this list should stay in sync with azure-pipelines.yml
     - crunch/
     - crnlib/
+    - example1/
+    - example2/
+    - example3/
     - inc/
+    - test/
     - cmake/
     - CMakeLists.txt
 
@@ -52,3 +53,5 @@ build_script:
       -DBUILD_CRUNCH=ON -DBUILD_SHARED_LIBCRN=ON -DBUILD_EXAMPLES=ON
 
       cmake --build build --config Release
+
+      python test\test.py

From 668fff3f2ee0b8fb3d323b50a8fd782225d196a3 Mon Sep 17 00:00:00 2001
From: Thomas Debesse <dev@illwieckz.net>
Date: Wed, 3 Jul 2024 17:38:10 +0200
Subject: [PATCH 8/8] readme: update

---
 README.md | 203 +++++++++++++++++++++++++++++++++---------------------
 1 file changed, 123 insertions(+), 80 deletions(-)

diff --git a/README.md b/README.md
index 0ffa5b52..4d225776 100644
--- a/README.md
+++ b/README.md
@@ -5,20 +5,29 @@
 - Upstream for the Dæmon branch: https://github.com/DaemonEngine/crunch
 - Bug tracker for the Dæmon branch: https://github.com/DaemonEngine/crunch/issues
 
+Target & compiler|Build status|Target & compiler|Build status
+-|-|-|-
+<sub>Linux amd64 GCC</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Linux%20amd64%20Clang)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)|<sub>Windows amd64 MSVC</sub>|[![Build status](https://ci.appveyor.com/api/projects/status/github/DaemonEngine/crunch?banch=master&svg=true)](https://ci.appveyor.com/project/DolceTriade/crunch/history)
+<sub>Linux amd64 Clang</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Linux%20amd64%20Clang)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)|<sub>Windows i686 MSVC</sub>|[![Build status](https://ci.appveyor.com/api/projects/status/github/DaemonEngine/crunch?banch=master&svg=true)](https://ci.appveyor.com/project/DolceTriade/crunch/history)
+<sub>Linux i686 GCC|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Linux%20i686%20GCC)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)|<sub>Windows amd64 MinGW</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Windows%20amd64%20MinGW)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)
+<sub>Linux arm64 GCC</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Linux%20arm64%20GCC)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)|<sub>Windows i686 MinGW</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Windows%20i686%20MinGW)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)
+<sub>Linux armhf GCC</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Linux%20armhf%20GCC)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)|<sub>macOS amd64 AppleClang</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20macOS%20amd64%20AppleClang)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)
+<sub>Web Asm.js Emscripten</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20Web%20Asm.js%20Emscripten)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)|<sub>macOS arm64 AppleClang</sub>|[![Build Status](https://dev.azure.com/UnvanquishedDevelopment/crunch/_apis/build/status%2FDaemonEngine.crunch?branchName=master&jobName=Job&configuration=Job%20macOS%20arm64%20AppleClang)](https://dev.azure.com/UnvanquishedDevelopment/crunch/_build/latest?definitionId=3&branchName=master)
+
 ## Dæmon crunch tool
 
-ℹ️ The [Dæmon engine](https://github.com/DaemonEngine/Daemon) uses the [`master`](https://github.com/DaemonEngine/crunch/tree/master) branch, which currently tracks the [Unity fork](https://github.com/Unity-Technologies/crunch/tree/unity), with a few additional minor fixes. The Dæmon engine is the open source game engine powering the [Unvanquished game](https://unvanquished.net). The produced CRN files are openable by the Unity game engine.
+ℹ️ The [Dæmon engine](https://github.com/DaemonEngine/Daemon) uses the [`master`](https://github.com/DaemonEngine/crunch/tree/master) branch, which tracks the [Unity fork](https://github.com/Unity-Technologies/crunch/tree/unity), with additional fixes and features. The Dæmon engine is the open source game engine powering the [Unvanquished game](https://unvanquished.net). The produced `.crn` files are compatible with both the Daemon game engine and the Unity game engine.
 
-Crunch is brought to you by:
+Dæmon crunch is brought to you by:
 
-- **2014-2023**: Dæmon Developers and contributors  
+- **2014-2024**: Dæmon Developers and contributors  
   https://github.com/DaemonEngine/crunch
 - **2017-2018**: Alexander Suvorov and Unity Software Inc.  
   https://github.com/Unity-Technologies/crunch/tree/unity
 - **2010-2017**: Richard Geldreich, Jr. and Binomial LLC and contributors  
   https://github.com/BinomialLLC/crunch
 
-The Dæmon branch is known to be used by:
+The Dæmon crunch is known to be used by:
 
 - The [Dæmon game engine](https://github.com/DaemonEngine/Daemon),
 - The [Urcheon game data build automation tool](https://github.com/DaemonEngine/Urcheon),
@@ -27,6 +36,17 @@ The Dæmon branch is known to be used by:
 - The [Xonotic game](https://xonotic.org),
 - Some games using the Unity game engine.
 
+This branch provides many improvements over the original crunch:
+
+- ✅️ Unity crunch format (runs many time faster and produces smaller files),
+- ✅️ Unity crunch metadata (the header is compatible with Unity),
+- ✅️ Improved image compatibility (1-bit PNG images are now supported),
+- ✅️ Added features and command line options (top mip renormalization and more),
+- ✅️ Network file system compatibility,
+- ✅️ Optional header-only checksumming,
+- ✅️ Multisystem and multiplatform (runs almost everywhere),
+- ✅️ CMake toolchain (with many useful build options).
+
 ## Unity crunch format
 
 This repository merged improvements done by Unity Technologies, it produces
@@ -51,7 +71,11 @@ Unlike the Unity `crunch` tool built from their public repository, this tool pro
 
 Since [February 11th 2023](faf5127b8c69dfd1ae554f4f3bf8168048b48d9f), this branch sets the CRN `m_userdata0` field to `1` to make CRN files loadable by the Unity engine which now prevents to load files with this value set to `0`.
 
-Files with this value set to `1` are expected to use the new format. Files with this value set to `0` may or may not use the new format. When Unity updated the tool and modified the format in an incompatible way, no bit was modified to detect if a CRN file was using the old or the new format. Unity has not updated that field in their public repository of Crunch so there may be files using new format with this value set to `0` in the wild.
+Files with this value set to `1` are expected to use the new format. Files with this value set to `0` may or may not use the new format. When Unity updated the tool and modified the format in an incompatible way, no bit was modified to detect if a CRN file was using the old or the new format. Unity has not updated that field in their public repository of Crunch so there may be files in the wild using new format with this value set to `0`.
+
+## Improved image compatibility
+
+The `stb_image` library was updated from version 1.18 to version 2.30, increasing the amount of image format variants that can be converted, like 1-bit PNG formats.
 
 ## Added features and command line options
 
@@ -61,28 +85,40 @@ In addition to the original `crunch` features and command line options this bran
 - `-noNormalDetection`: do not attempt to detect normal map to avoid selecting formats thought for normal maps when it's known an image is not a normal map. It may prevent the tool to use heavier and less-supported `DXT5_AGBR` format when `DXT1` is good enough.
 - `-h` or `--help`: print the command line built-in help.
 
+## Network file system compatibility
+
+The original `crunch` tool used I/O functions not working on some network file systems like NFS or SSHFS. The limitations is now gone and `crunch` can now process image files stored over the network.
+
+## Optional header-only checksumming
+
+For applications distributing their files in containers already providing a checksum mechanism for the whole contained file, it's now possible to only validate the CRN header checksum instead of the whole file checksum to not checksum the whole file twice.
+
 ## Multisystem and multiplatform portability
 
 Unlike upstream branches from Binomial LLC and Unity Software Inc. this branch focuses on keeping the code buildable outside of Windows and Visual Studio, and adds a CMake build option alongside the legacy Makefile.
 
 This `crunch` tool and the related `crnlib` library are known to build with and and run on:
 
-- Compilers: GCC, MSYS2/Mingw, MSVC, Clang, Apple Clang, ICC, ICX.
+- Compilers: GCC, MinGW, MSVC, Clang, Apple Clang, and more.
 - Systems: Linux, Windows, macOS, FreeBSD.
 - Architectures: amd64, arm64, i686, armhf.
 
+## CMake toolchain
+
+CMake is now preferred to the old Makefile. The supplied CMake configuration provides many useful build options. Toolchain files for MinGW cross-compilation are also supplied.
+
 ## How to build
 
 ```sh
 git clone https://github.com/DaemonEngine/crunch.git
 cd crunch
-cmake -H. -Bbuild
+cmake -S. -Bbuild
 cmake --build build --parallel $(nproc)
 ```
 
 Where `$(nproc)` is the amount of cores of your computer.
 
-You'll then find a `crunch` binary in `build/` folder.
+You'll then find a `crunch` binary in the `build/` folder.
 
 Some CMake build options are availables (explore more with `ccmake`).
 
@@ -94,7 +130,7 @@ http://opensource.org/licenses/Zlib
 Richard Geldreich removed copyright on all his work on Crunch in order to put it in public domain on 2020-09-15 with commit [`crunch@57353fa`](https://github.com/BinomialLLC/crunch/commit/57353fa9ac0908893215bc30ba106adfb80c4c95) but this repository also contains commits by Alexander Suvorov from Unity Technologies and from Dæmon Developers and contributors.
 
 Portions of this software make use of public domain code originally
-written by Igor Pavlov (LZMA), RYG (crn_ryg_dxt*), and Sean Barrett (stb_image.c).
+written by Igor Pavlov (LZMA), RYG (`crn_ryg_dxt*`), and Sean Barrett (`stb_image*.h`).
 
 If you use this software in a product, an acknowledgment in the product 
 documentation would be highly appreciated but is not required.
@@ -122,33 +158,33 @@ between 100-250 megatexels/sec. The current library supports PC
 (Win32/x64) and Xbox 360. Fast random access to individual mipmap levels
 is supported.
 
-crnlib can also generates standard .DDS files at specified quality
+crnlib can also generates standard DDS files at specified quality
 setting, which results in files that are much more compressible by
 LZMA/Deflate/etc. compared to files generated by standard DXTn texture
 tools (see below). This feature allows easy integration into any engine
-or graphics library that already supports .DDS files.
+or graphics library that already supports DDS files.
 
-The .CRN file format supports the following core DXTn texture formats:
+The CRN file format supports the following core DXTn texture formats:
 DXT1 (but not DXT1A), DXT5, DXT5A, and DXN/3DC
 
 It also supports several popular swizzled variants (several are
 also supported by AMD's Compressonator): 
 DXT5_XGBR, DXT5_xGxR, DXT5_AGBR, and DXT5_CCxY (experimental luma-chroma YCoCg).
 
-## Recommended Software
+## Recommended software
 
 AMD's [Compressonator tool](https://github.com/GPUOpen-Tools/Compressonator)
-is recommended to view the .DDS files created by the crunch tool and the included example projects.
+is recommended to view the DDS files created by the crunch tool and the included example projects.
 
-Note: Some of the swizzled DXTn .DDS output formats (such as DXT5_xGBR)
+Note: Some of the swizzled DXTn DDS output formats (such as DXT5_xGBR)
 read/written by the crunch tool or examples deviate from the DX9 DDS
-standard, so DXSDK tools such as DXTEX.EXE won't load them at all or
+standard, so DXSDK tools such as `DXTEX.EXE` won't load them at all or
 they won't be properly displayed.
 
-## Compression Algorithm Details
+## Compression algorithm details
 
-The compression process employed in creating both .CRN and
-clustered .DDS files utilizes a very high quality, scalable DXTn
+The compression process employed in creating both CRN and
+clustered DDS files utilizes a very high quality, scalable DXTn
 endpoint optimizer capable of processing any number of pixels (instead
 of the typical hard coded 16), optional adaptive switching between
 several macroblock sizes/configurations (currently any combination of
@@ -160,70 +196,70 @@ passes are performed between the clusterization and VQ steps to optimize
 quality, and several steps use a brute force refinement approach to improve 
 quality. The majority of compression steps are multithreaded.
 
-The .CRN format currently utilizes canonical Huffman coding for speed
+The CRN format currently utilizes canonical Huffman coding for speed
 (similar to Deflate but with much larger tables), but the next major
 version will also utilize adaptive binary arithmetic coding and higher
 order context modeling using already developed tech from the my LZHAM
 compression library.
 
-## Supported File Formats
+## Supported file formats
 
-crnlib supports two compressed texture file formats. The first
-format (clustered .DDS) is simple to integrate into an existing project
+crnlib supports three compressed texture file formats. The first
+format (clustered DDS) is simple to integrate into an existing project
 (typically, no code changes are required), but it doesn't offer the
 highest quality/compression ratio that crnlib is capable of. Integrating
-the second, higher quality custom format (.CRN) requires a few
+the second, higher quality custom format (CRN) requires a few
 typically straightforward engine modifications to integrate the
-.CRN->DXTn transcoder header file library into your tools/engine.
+CRN→DXTn transcoder header file library into your tools/engine.
 
-### .DDS
+### DDS
 
-crnlib can compress textures to standard DX9-style .DDS files using
+crnlib can compress textures to standard DX9-style `.dds` files using
 clustered DXTn compression, which is a subset of the approach used to
-create .CRN files.(For completeness, crnlib also supports vanilla, block
+create CRN files.(For completeness, crnlib also supports vanilla, block
 by block DXTn compression too, but that's not very interesting.)
-Clustered DXTn compressed .DDS files are much more compressible than
+Clustered DXTn compressed DDS files are much more compressible than
 files created by other libraries/tools. Apart from increased
-compressibility, the .DDS files generated by this process are completely
+compressibility, the DDS files generated by this process are completely
 standard so they should be fairly easy to add to a project with little
 to no code changes.
 
-To actually benefit from clustered DXTn .DDS files, your engine needs to
-further losslessly compress the .DDS data generated by crnlib using a
+To actually benefit from clustered DXTn DDS files, your engine needs to
+further losslessly compress the DDS data generated by crnlib using a
 lossless codec such as zlib, lzo, LZMA, LZHAM, etc. Most likely, your
 engine does this already. (If not, you definitely should because DXTn
 compressed textures generally contain a large amount of highly redundant
 data.)
 
-Clustered .DDS files are intended to be the simplest/fastest way to
+Clustered DDS files are intended to be the simplest/fastest way to
 integrate crnlib's tech into a project.
 
-### .CRN
+### CRN
 
-The second, better, option is to compress your textures to .CRN files
-using crnlib. To read the resulting .CRN data, you must add the .CRN
+The second, better, option is to compress your textures to `.crn` files
+using crnlib. To read the resulting CRN data, you must add the CRN
 transcoder library (located in the included single file, stand-alone
-header file library inc/crn_decomp.h) into your application. .CRN files
+header file library inc/crn_decomp.h) into your application. CRN files
 provide noticeably higher quality at the same effective bitrate compared
-to clustered DXTn compressed .DDS files. Also, .CRN files don't require
+to clustered DXTn compressed DDS files. Also, CRN files don't require
 further lossless compression because they're already highly compressed.
 
-.CRN files are a bit more difficult/risky to integrate into a project, but
-the resulting compression ratio and quality is superior vs. clustered .DDS files.
+CRN files are a bit more difficult/risky to integrate into a project, but
+the resulting compression ratio and quality is superior vs. clustered DDS files.
 
-### .KTX
+### KTX
 
-crnlib and crunch can read/write the .KTX file format in various pixel formats.
+crnlib and crunch can read/write the `.ktx` file format in various pixel formats.
 Rate distortion optimization (clustered DXTc compression) is not yet supported
-when writing .KTX files. 
+when writing KTX files. 
 
-The .KTX file format is just like .DDS, except it's a fairly well specified
-standard created by the Khronos Group. Unfortunately, almost all of the tools I've
-found that support .KTX are fairly (to very) buggy, or are limited to only a handful
-of pixel formats, so there's no guarantee that the .KTX files written by crnlib can
-be reliably read by other tools.
+The KTX file format is just like DDS, except it's a fairly well specified
+standard created by the Khronos Group. Unfortunately, almost all of the tools
+the original Crunch author found that supported KTX were fairly (to very) buggy,
+or were limited to only a handful of pixel formats, so there's no guarantee that
+the KTX files written by crnlib can be reliably read by other tools.
 
-## Building the Examples
+## Building the examples
 
 This release contains the source code and projects for three simple
 example projects:
@@ -237,39 +273,41 @@ way hasn't been tested much.
 ### example1
 
 Demonstrates how to use crnlib's high-level C-helper
-compression/decompression/transcoding functions in inc/crnlib.h. It's a
+compression/decompression/transcoding functions in `inc/crnlib.h`. It's a
 fairly complete example of crnlib's functionality.
 
 ### example2
-Shows how to transcodec .CRN files to .DDS using **only**
-the functionality in inc/crn_decomp.h. It does not link against against
-crnlib.lib or depend on it in any way. (Note: The complete source code,
-approx. 4800 lines, to the CRN transcoder is included in inc/crn_decomp.h.)
 
-example2 is intended to show how simple it is to integrate CRN textures
+Shows how to transcodec CRN files to DDS using **only**
+the functionality in `inc/crn_decomp.h`. It does not link against against
+`crnlib.lib` or depend on it in any way. (Note: The complete source code,
+approx. 4800 lines, to the CRN transcoder is included in `inc/crn_decomp.h`.)
+
+`example2` is intended to show how simple it is to integrate CRN textures
 into your application.
 
 ### example3
+
 Shows how to use the regular, low-level DXTn block compressor
-functions in inc/crnlib.h. This functionality is included for
+functions in `inc/crnlib.h`. This functionality is included for
 completeness. (Your engine or toolchain most likely already has its own
 DXTn compressor. crnlib's compressor is typically very competitive or
 superior to most available closed and open source CPU-based
 compressors.)
 
-## Creating Compressed Textures from the Command Line (crunch.exe)
+## Creating compressed textures with crunch
 
 The simplest way to create compressed textures using crnlib is to
-integrate the bin\crunch.exe or bin\crunch_x64.exe) command line tool
+integrate the `crunch` (or `crunch.exe`) command line tool
 into your texture build toolchain or export process. It can write DXTn
-compressed 2D/cubemap textures to regular DXTn compressed .DDS,
-clustered (or reduced entropy) DXTn compressed .DDS, or .CRN files. It
+compressed 2D/cubemap textures to regular DXTn compressed DDS,
+clustered (or reduced entropy) DXTn compressed DDS, or CRN files. It
 can also transcode or decompress files to several standard image
-formats, such as TGA or BMP. Run crunch.exe with no options for help.
+formats, such as TGA or BMP. Run `crunch --help` for help.
 
-The .CRN files created by crunch.exe can be efficiently transcoded to
+The `.crn` files created by `crunch` can be efficiently transcoded to
 DXTn using the included CRN transcoding library, located in full source
-form under inc/crn_decomp.h.
+form under `inc/crn_decomp.h`.
 
 Here are a few example crunch.exe command lines:
 
@@ -330,11 +368,11 @@ void *crn_compress( const crn_comp_params &comp_params,
                     float *pActual_bitrate = NULL);
 ```
 
-You can also transcode/uncompress .DDS/.CRN files to raw 32bpp images
+You can also transcode/uncompress DDS/CRN files to raw 32bpp images
 using `crn_decompress_crn_to_dds()` and `crn_decompress_dds_to_images()`.
 
 Internally, crnlib just uses inc/crn_decomp.h to transcode textures to
-DXTn. If you only need to transcode .CRN format files to raw DXTn bits
+DXTn. If you only need to transcode CRN format files to raw DXTn bits
 at runtime (and not compress), you don't actually need to compile or
 link against crnlib at all. Just include inc/crn_decomp.h, which
 contains a completely self-contained CRN transcoder in the "crnd"
@@ -346,31 +384,31 @@ GPU you're using. (See example2.)
 Important note: When compiling under native client, be sure to define
 the `PLATFORM_NACL` macro before including the `inc/crn_decomp.h` header file library.
 
-## Known Issues/Bugs
+## Known issues/Bugs
 
 * crnlib currently assumes you'll be further losslessly compressing its
-output .DDS files using LZMA. However, some engines use weaker codecs
+output DDS files using LZMA. However, some engines use weaker codecs
 such as LZO, zlib, or custom codecs, so crnlib's bitrate measurements
 will be inaccurate. It should be easy to allow the caller to plug-in
 custom lossless compressors for bitrate measurement.
 
 * Compressing to a desired bitrate can be time consuming, especially when
-processing large (2k or 4k) images to the .CRN format. There are several
-high-level optimizations employed when compressing to clustered DXTn .DDS
-files using multiple trials, but not so for .CRN.
+processing large (2k or 4k) images to the CRN format. There are several
+high-level optimizations employed when compressing to clustered DXTn DDS
+files using multiple trials, but not so for CRN.
 
-* The .CRN compressor does not currently use 3 color (transparent) DXT1
+* The CRN compressor does not currently use 3 color (transparent) DXT1
 blocks at all, only 4 color blocks. So it doesn't support DXT1A
 transparency, and its output quality suffers a little due to this
 limitation. (Note that the clustered DXTn compressor used when
-writing clustered .DDS files does *not* have this limitation.)
+writing clustered DDS files does _not_ have this limitation.)
 
 * Clustered DXT5/DXT5A compressor is able to group DXT5A blocks into
 clusters only if they use absolute (black/white) selector indices. This
 hurts performance at very low bitrates, because too many bits are
 effectively given to alpha.
 
-* DXT3 is not supported when writing .CRN or clustered DXTn DDS files.
+* DXT3 is not supported when writing CRN or clustered DXTn DDS files.
 (DXT3 is supported by crnlib's when compressing to regular DXTn DDS
 files.) You'll get DXT5 files if you request DXT3. However, DXT3 is
 supported by the regular DXTn block compressor. (DXT3's 4bpp fixed alpha
@@ -380,15 +418,20 @@ sucks verses DXT5 alpha blocks, so I don't see this as a bug deal.)
 hasn't been tuned for max. quality yet.
 
 * Clustered (or rate distortion optimized) DXTc compression is only
-supported when writing to .DDS, not .KTX. Also, only plain block by block
-compression is supported when writing to ETC1, and .CRN does not support ETC1.
+supported when writing to DDS, not KTX. Also, only plain block by block
+compression is supported when writing to ETC1, and CRN does not support ETC1.
 
-## Compile to Javascript with Emscripten
+## Compile to Javascript and WebAssembly with Emscripten
 
 Download and install Emscripten:
-    http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html
 
-From the root directory, run:
-```c
-    emcc -O3 emscripten/crunch_lib.cpp -I./inc -s EXPORTED_FUNCTIONS="['_malloc', '_free', '_crn_get_width', '_crn_get_height', '_crn_get_levels', '_crn_get_dxt_format', '_crn_get_bytes_per_block', '_crn_get_uncompressed_size', '_crn_decompress']" -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1 -s ELIMINATE_DUPLICATE_FUNCTIONS=1 -s ALLOW_MEMORY_GROWTH=1 --memory-init-file 0 -o crunch.js
+- https://emscripten.org/docs/getting_started/downloads.html
+
+From the repository directory, run:
+
+```sh
+cmake -Semscripten -Bbuild-emscripten
+cmake --build build-emscripten
 ```
+
+You’ll then find a `crunch.js` script and a `crunch.wasm` binary in the `build-emscripten/` folder.