Move nvtt to file

cmake/bimg/3rdparty/nvtt.cmake

@@ -0,0 +1,25 @@
+# bgfx.cmake - bgfx building in cmake
+# Written in 2017 by Joshua Brookover <joshua.al.brookover@gmail.com>
+#
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain
+# worldwide. This software is distributed without any warranty.
+#
+# You should have received a copy of the CC0 Public Domain Dedication along with
+# this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+# Ensure the directory exists
+if(NOT IS_DIRECTORY ${BIMG_DIR})
+	message(SEND_ERROR "Could not load bimg, directory does not exist. ${BIMG_DIR}")
+	return()
+endif()
+
+if(NOT NVTT_LIBRARIES)
+	file(
+		GLOB_RECURSE #
+		NVTT_SOURCES #
+		${BIMG_DIR}/3rdparty/nvtt/**.cpp #
+		${BIMG_DIR}/3rdparty/nvtt/**.h #
+	)
+	set(NVTT_INCLUDE_DIR ${BIMG_DIR}/3rdparty/nvtt)
+endif()

cmake/bimg/CMakeLists.txt

@@ -11,6 +11,7 @@
 include(3rdparty/loadpng.cmake)
 include(3rdparty/libsquish.cmake)
 include(3rdparty/astc_encoder.cmake)
+include(3rdparty/nvtt.cmake)
 include(3rdparty/pvrtc.cmake)
 include(3rdparty/tinyexr.cmake)
 include(3rdparty/iqa.cmake)

cmake/bimg/bimg_encode.cmake

@@ -25,7 +25,7 @@ target_include_directories(
 	PRIVATE ${BIMG_DIR}/3rdparty #
 			${LIBSQUISH_INCLUDE_DIR} #
 			${ASTC_ENCODER_INCLUDE_DIR}
-			${BIMG_DIR}/3rdparty/nvtt #
+			${NVTT_INCLUDE_DIR} #
 			${PVRTC_INCLUDE_DIR}
 			${TINYEXR_INCLUDE_DIR} #
 			${IQA_INCLUDE_DIR} #
@@ -45,8 +45,7 @@ file(
 	${BIMG_DIR}/3rdparty/etc1/**.h #
 	${BIMG_DIR}/3rdparty/etc2/**.cpp #
 	${BIMG_DIR}/3rdparty/etc2/**.hpp #
-	${BIMG_DIR}/3rdparty/nvtt/**.cpp #
-	${BIMG_DIR}/3rdparty/nvtt/**.h #
+	${NVTT_SOURCES} #
 	${PVRTC_SOURCES} #
 	${TINYEXR_SOURCES}
 	${IQA_SOURCES} #
@@ -59,6 +58,7 @@ target_link_libraries(
 	PUBLIC bx #
 		   ${LIBSQUISH_LIBRARIES} #
 		   ${ASTC_ENCODER_LIBRARIES} #
+		   ${NVTT_LIBRARIES}
 		   ${PVRTC_LIBRARIES} #
 		   ${TINYEXR_LIBRARIES} #
 		   ${IQA_LIBRARIES} #