IGL: Switch to KTX-Software in TinyMesh_Large

Summary:
This diff replaces usage of gli with KTX-Software. Later diffs will rework the IGLU texture_loader module to also make use of this.

This also switches the textures from ktx1 to ktx2.

Reviewed By: syeh1, corporateshark

Differential Revision: D49716504

fbshipit-source-id: 30fa5cd57fa8125f01d8da69ea2e5b7f84cc8515

CMakeLists.txt

@@ -237,6 +237,37 @@ if(IGL_WITH_SAMPLES)
     endif()
 endif()
 
+# KTX-Software forcibly includes fmt so prefer its version when building IGL_WITH_IGLU or IGL_WITH_SAMPLES
+if (NOT EMSCRIPTEN)
+  if (IGL_WITH_IGLU OR IGL_WITH_SAMPLES)
+    set(KTX_FEATURE_DOC OFF CACHE BOOL "")
+    set(KTX_FEATURE_GL_UPLOAD OFF CACHE BOOL "")
+    set(KTX_FEATURE_JNI OFF CACHE BOOL "")
+    set(KTX_FEATURE_KTX1 ON CACHE BOOL "")
+    set(KTX_FEATURE_KTX2 ON CACHE BOOL "")
+    set(KTX_FEATURE_LOADTEST_APPS OFF CACHE BOOL "")
+    set(KTX_FEATURE_STATIC_LIBRARY ON CACHE BOOL "")
+    set(KTX_FEATURE_TESTS OFF CACHE BOOL "")
+    set(KTX_FEATURE_TOOLS OFF CACHE BOOL "")
+    set(KTX_FEATURE_VK_UPLOAD OFF CACHE BOOL "")
+    add_subdirectory(third-party/deps/src/ktx-software)
+    igl_set_folder(astcenc-avx2-static "third-party/ktx-software")
+    igl_set_folder(ktx "third-party/ktx-software")
+    igl_set_folder(ktx_read "third-party/ktx-software")
+    igl_set_folder(ktx_version "third-party/ktx-software")
+    igl_set_folder(makedfd2vk "third-party/ktx-software")
+    igl_set_folder(makevk2dfd "third-party/ktx-software")
+    igl_set_folder(mkvk "third-party/ktx-software")
+    igl_set_folder(mkvkformatfiles "third-party/ktx-software")
+    igl_set_folder(obj_basisu_cbind "third-party/ktx-software")
+    igl_set_folder(objUtil "third-party/ktx-software")
+    igl_set_folder(fmt "third-party")
+  elseif (IGL_WITH_VULKAN)
+    add_subdirectory(third-party/deps/src/fmt "fmt")
+    igl_set_folder(fmt "third-party")
+  endif()
+endif()
+
 if(IGL_WITH_TRACY)
   target_link_libraries(IGLLibrary PUBLIC TracyClient)
 endif()

LICENSE.md

@@ -53,9 +53,6 @@ https://github.com/nigels-com/glew/blob/master/LICENSE.txt
 glfw
 https://github.com/glfw/glfw/blob/master/LICENSE.md
 
-gli
-https://github.com/g-truc/gli#readme
-
 glm
 https://github.com/g-truc/glm
 
@@ -71,6 +68,9 @@ https://github.com/ocornut/imgui/blob/master/LICENSE.txt
 ios-cmake
 https://github.com/leetal/ios-cmake/blob/master/LICENSE.md
 
+KTX-Software
+https://github.com/KhronosGroup/KTX-Software/blob/main/LICENSE.md
+
 Meshoptimizer
 https://github.com/zeux/meshoptimizer/blob/master/LICENSE.md
 

samples/desktop/CMakeLists.txt

@@ -25,6 +25,7 @@ macro(ADD_DEMO app)
   target_link_libraries(${app} PRIVATE meshoptimizer)
   target_link_libraries(${app} PRIVATE tinyobjloader)
   target_link_libraries(${app} PRIVATE glfw)
+  target_link_libraries(${app} PRIVATE ktx)
   if(IGL_WITH_IGLU)
     target_link_libraries(${app} PRIVATE IGLUimgui)
     target_link_libraries(${app} PRIVATE IGLUsimple_renderer)