Draco v1.5.0 release. (#779)

.cmake-format.py

@@ -64,7 +64,7 @@
 # If comment markup is enabled, don't reflow the first comment block in
 # eachlistfile. Use this to preserve formatting of your
 # copyright/licensestatements.
-first_comment_is_literal = False
+first_comment_is_literal = True
 
 # If comment markup is enabled, don't reflow any comment block which matchesthis
 # (regex) pattern. Default is `None` (disabled).

.gitmodules

@@ -1,3 +1,12 @@
 [submodule "third_party/googletest"]
-	path = third_party/googletest
-	url = https://github.com/google/googletest.git
+  path = third_party/googletest
+  url = https://github.com/google/googletest.git
+[submodule "third_party/eigen"]
+  path = third_party/eigen
+  url = https://gitlab.com/libeigen/eigen.git
+[submodule "third_party/tinygltf"]
+  path = third_party/tinygltf
+  url = https://github.com/syoyo/tinygltf.git
+[submodule "third_party/filesystem"]
+  path = third_party/filesystem
+  url = https://github.com/gulrak/filesystem

BUILDING.md

@@ -4,8 +4,10 @@ _**Contents**_
   * [Mac OS X](#mac-os-x)
   * [Windows](#windows)
   * [CMake Build Configuration](#cmake-build-configuration)
+    * [Transcoder](#transcoder)
     * [Debugging and Optimization](#debugging-and-optimization)
     * [Googletest Integration](#googletest-integration)
+    * [Third Party Libraries](#third-party-libraries)
     * [Javascript Encoder/Decoder](#javascript-encoderdecoder)
     * [WebAssembly Decoder](#webassembly-decoder)
     * [WebAssembly Mesh Only Decoder](#webassembly-mesh-only-decoder)
@@ -72,6 +74,21 @@ C:\Users\nobody> cmake ../ -G "Visual Studio 16 2019" -A x64
 CMake Build Configuration
 -------------------------
 
+Transcoder
+----------
+
+In order to build the `draco_transcoder` target, the transcoding support needs
+to be explicitly enabled when you run `cmake`, for example:
+
+~~~~~ bash
+$ cmake ../ -DDRACO_TRANCODER_SUPPORTED=ON
+~~~~~
+
+The above option is currently not compatible with our Javascript or WebAssembly
+builds but all other use cases are supported. Note that binaries and libraries
+built with the transcoder support may result in increased binary sizes of the
+produced libraries and executables compared to the default CMake settings.
+
 Debugging and Optimization
 --------------------------
 
@@ -135,6 +152,28 @@ To run the tests execute `draco_tests` from your build output directory:
 $ ./draco_tests
 ~~~~~
 
+Third Party Libraries
+---------------------
+
+When Draco is built with transcoding and/or testing support enabled the project
+has dependencies on third party libraries:
+
+- [Eigen](https://eigen.tuxfamily.org/)
+  - Provides various math utilites.
+- [Googletest](https://github.com/google/googletest)
+  - Provides testing support.
+- [Gulrak/filesystem](https://github.com/gulrak/filesystem)
+  - Provides C++17 std::filesystem emulation for pre-C++17 environments.
+- [TinyGLTF](https://github.com/syoyo/tinygltf)
+  - Provides GLTF I/O support.
+
+These dependencies are managed as Git submodules. To obtain the dependencies
+run the following command in your Draco repository:
+
+~~~~~ bash
+$ git submodule update --init
+~~~~~
+
 WebAssembly Decoder
 -------------------
 

CMakeLists.txt

@@ -14,7 +14,8 @@
 
 cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
 
-# Draco requires C++11.
+# Draco requires modern compiler support.
+set(CMAKE_C_STANDARD 99)
 set(CMAKE_CXX_STANDARD 11)
 project(draco C CXX)
 
@@ -81,6 +82,7 @@ draco_reset_target_lists()
 draco_setup_options()
 draco_set_build_definitions()
 draco_set_cxx_flags()
+draco_set_exe_linker_flags()
 draco_generate_features_h()
 
 # Draco source file listing variables.
@@ -508,12 +510,77 @@ list(APPEND draco_maya_plug_sources
             "${draco_src_root}/maya/draco_maya_plugin.cc"
             "${draco_src_root}/maya/draco_maya_plugin.h")
 
+if(DRACO_TRANSCODER_SUPPORTED)
+  list(APPEND draco_animation_sources
+    "${draco_src_root}/animation/animation.cc"
+    "${draco_src_root}/animation/animation.h"
+    "${draco_src_root}/animation/node_animation_data.h"
+    "${draco_src_root}/animation/skin.cc"
+    "${draco_src_root}/animation/skin.h")
+
+ list(APPEND draco_io_sources
+    "${draco_src_root}/io/gltf_decoder.cc"
+    "${draco_src_root}/io/gltf_decoder.h"
+    "${draco_src_root}/io/gltf_encoder.cc"
+    "${draco_src_root}/io/gltf_encoder.h"
+    "${draco_src_root}/io/gltf_utils.cc"
+    "${draco_src_root}/io/gltf_utils.h"
+    "${draco_src_root}/io/image_compression_options.h"
+    "${draco_src_root}/io/scene_io.cc"
+    "${draco_src_root}/io/scene_io.h"
+    "${draco_src_root}/io/texture_io.cc"
+    "${draco_src_root}/io/texture_io.h"
+    "${draco_src_root}/io/tiny_gltf_utils.cc"
+    "${draco_src_root}/io/tiny_gltf_utils.h")
+
+  list(APPEND draco_material_sources
+    "${draco_src_root}/material/material.cc"
+    "${draco_src_root}/material/material.h"
+    "${draco_src_root}/material/material_library.cc"
+    "${draco_src_root}/material/material_library.h")
+
+  list(APPEND draco_mesh_sources
+    "${draco_src_root}/mesh/mesh_splitter.cc"
+    "${draco_src_root}/mesh/mesh_splitter.h"
+    "${draco_src_root}/mesh/mesh_utils.cc"
+    "${draco_src_root}/mesh/mesh_utils.h")
+
+  list(APPEND draco_scene_sources
+    "${draco_src_root}/scene/mesh_group.h"
+    "${draco_src_root}/scene/scene.cc"
+    "${draco_src_root}/scene/scene.h"
+    "${draco_src_root}/scene/scene_indices.h"
+    "${draco_src_root}/scene/scene_node.h"
+    "${draco_src_root}/scene/scene_utils.cc"
+    "${draco_src_root}/scene/scene_utils.h"
+    "${draco_src_root}/scene/trs_matrix.cc"
+    "${draco_src_root}/scene/trs_matrix.h")
+
+  list(APPEND draco_texture_sources
+    "${draco_src_root}/texture/source_image.cc"
+    "${draco_src_root}/texture/source_image.h"
+    "${draco_src_root}/texture/texture.h"
+    "${draco_src_root}/texture/texture_library.cc"
+    "${draco_src_root}/texture/texture_library.h"
+    "${draco_src_root}/texture/texture_map.cc"
+    "${draco_src_root}/texture/texture_map.h"
+    "${draco_src_root}/texture/texture_transform.cc"
+    "${draco_src_root}/texture/texture_transform.h"
+    "${draco_src_root}/texture/texture_utils.cc"
+    "${draco_src_root}/texture/texture_utils.h")
+endif()
+
 #
 # Draco targets.
 #
 if(EMSCRIPTEN AND DRACO_JS_GLUE)
   # Draco decoder and encoder "executable" targets in various flavors for
-  # Emsscripten.
+  # Emscripten.
+
+  if(DRACO_TRANSCODER_SUPPORTED)
+    message(FATAL_ERROR "The transcoder is not supported in Emscripten.")
+  endif()
+
   list(APPEND draco_decoder_src
               ${draco_attributes_sources}
               ${draco_compression_attributes_dec_sources}
@@ -788,7 +855,45 @@ else()
                     INCLUDES
                     ${draco_include_paths})
 
-  set(draco_object_library_deps
+  if(DRACO_TRANSCODER_SUPPORTED)
+    draco_add_library(
+      NAME
+      draco_material
+      TYPE
+      OBJECT
+      SOURCES
+      ${draco_material_sources}
+      DEFINES
+      ${draco_defines}
+      INCLUDES
+      ${draco_include_paths})
+
+    draco_add_library(
+      NAME
+      draco_scene
+      TYPE
+      OBJECT
+      SOURCES
+      ${draco_scene_sources}
+      DEFINES
+      ${draco_defines}
+      INCLUDES
+      ${draco_include_paths})
+
+    draco_add_library(
+      NAME
+      draco_texture
+      TYPE
+      OBJECT
+      SOURCES
+      ${draco_texture_sources}
+      DEFINES
+      ${draco_defines}
+      INCLUDES
+      ${draco_include_paths})
+  endif()
+
+  list(APPEND draco_object_library_deps
       draco_attributes
       draco_compression_attributes_dec
       draco_compression_attributes_enc
@@ -817,14 +922,19 @@ else()
       draco_points_dec
       draco_points_enc)
 
+  if(DRACO_TRANSCODER_SUPPORTED)
+    list(APPEND draco_object_library_deps
+         draco_material draco_scene draco_texture)
+  endif()
+
   # Library targets that consume the object collections.
   if(MSVC)
     # In order to produce a DLL and import library the Windows tools require
     # that the exported symbols are part of the DLL target. The unfortunate side
     # effect of this is that a single configuration cannot output both the
     # static library and the DLL: This results in an either/or situation.
-    # Windows users of the draco build can have a DLL and an import library,
-    # or they can have a static library; they cannot have both from a single
+    # Windows users of the draco build can have a DLL and an import library, or
+    # they can have a static library; they cannot have both from a single
     # configuration of the build.
     if(BUILD_SHARED_LIBS)
       set(draco_lib_type SHARED)
@@ -955,6 +1065,22 @@ else()
                        LIB_DEPS
                        ${draco_dependency})
 
+  if(DRACO_TRANSCODER_SUPPORTED)
+    draco_add_executable(NAME
+                         draco_transcoder
+                         SOURCES
+                         "${draco_src_root}/tools/draco_transcoder.cc"
+                         "${draco_src_root}/tools/draco_transcoder_lib.cc"
+                         "${draco_src_root}/tools/draco_transcoder_lib.h"
+                         ${draco_io_sources}
+                         DEFINES
+                         ${draco_defines}
+                         INCLUDES
+                         ${draco_include_paths}
+                         LIB_DEPS
+                         ${draco_dependency})
+  endif()
+
   draco_setup_install_target()
   draco_setup_test_targets()
 endif()

README.md

@@ -14,6 +14,29 @@ delays can result in transient errors that can be difficult to diagnose when
 new Draco releases are launched. To avoid the issue pin your sites to a
 versioned release.
 
+### Version 1.5.0 release
+* Adds the draco_transcoder tool. See the section below on the glTF transcoding
+  tool, and BUILDING.md for build and dependency information.
+* Some changes to configuration variables have been made for this release:
+  - The DRACO_GLTF flag has been renamed to DRACO_GLTF_BITSTREAM to help
+    increase understanding of its purpose, which is to limit Draco features to
+    those included in the Draco glTF specification.
+  - Variables exported in CMake via draco-config.cmake and find-draco.cmake
+    (formerly FindDraco.cmake) have been renamed. It's unlikely that this
+    impacts any existing projects as the aforementioned files were not formed
+    correctly. See [PR775](https://github.com/google/draco/pull/775) for full
+    details of the changes.
+* A CMake version file has been added.
+* The CMake install target now uses absolute paths direct from CMake instead
+  of building them using CMAKE_INSTALL_PREFIX. This was done to make Draco
+  easier to use for downstream packagers and should have little to no impact on
+  users picking up Draco from source.
+* Certain MSVC warnings have had their levels changed via compiler flag to
+  reduce the amount of noise output by the MSVC compilers. Set MSVC warning
+  level to 4, or define DRACO_DEBUG_MSVC_WARNINGS at CMake configuration time
+  to restore previous behavior.
+* Bug fixes.
+
 ### Version 1.4.3 release
 * Using the versioned www.gstatic.com WASM and Javascript decoders continues
   to be recommended. To use v1.4.3, use this URL:
@@ -143,6 +166,7 @@ _**Contents**_
     * [Encoding Tool](#encoding-tool)
     * [Encoding Point Clouds](#encoding-point-clouds)
     * [Decoding Tool](#decoding-tool)
+    * [glTF Transcoding Tool](#gltf-transcoding-tool)
     * [C++ Decoder API](#c-decoder-api)
     * [Javascript Encoder API](#javascript-encoder-api)
     * [Javascript Decoder API](#javascript-decoder-api)
@@ -185,9 +209,11 @@ Command Line Applications
 ------------------------
 
 The default target created from the build files will be the `draco_encoder`
-and `draco_decoder` command line applications. For both applications, if you
-run them without any arguments or `-h`, the applications will output usage and
-options.
+and `draco_decoder` command line applications. Additionally, `draco_transcoder`
+is generated when CMake is run with the DRACO_TRANSCODER_SUPPORTED variable set
+to ON (see [BUILDING](BUILDING.md#transcoder) for more details). For all
+applications, if you run them without any arguments or `-h`, the applications
+will output usage and options.
 
 Encoding Tool
 -------------
@@ -254,8 +280,27 @@ The basic command line looks like this:
 ./draco_decoder -i in.drc -o out.obj
 ~~~~~
 
+glTF Transcoding Tool
+---------------------
+
+`draco_transcoder` can be used to add Draco compression to glTF assets. The
+basic command line looks like this:
+
+~~~~~ bash
+./draco_transcoder -i in.glb -o out.glb
+~~~~~
+
+This command line will add geometry compression to all meshes in the `in.glb`
+file. Quantization values for different glTF attributes can be specified
+similarly to the `draco_encoder` tool. For example `-qp` can be used to define
+quantization of the position attribute:
+
+~~~~~ bash
+./draco_transcoder -i in.glb -o out.glb -qp 12
+~~~~~
+
 C++ Decoder API
--------------
+---------------
 
 If you'd like to add decoding to your applications you will need to include
 the `draco_dec` library. In order to use the Draco decoder you need to