Update dfdutils-included vulkan_core.h. (KhronosGroup#783)

ASTC HDR and A4B4G4R4_UNORM formats are now core. Update all code and
tests to use the non _EXT names. Make `ktx create --format` accept both
variants of the format name.

Fix mkvkformatfiles to add format aliases to `stringToVkFormat`.

Fix dfdutils scripts to not create duplicate cases for _{EXT,KHR} and
non-_{EXT,KHR} names.

Fix long standing bug in the dfdutils scripts where they were reading as input both
files given on the command line.

Add instructions and a script for regenerating vulkan_core.h from vk.xml.

Do not look for the VulkanSDK for mkvk target as it does not use the SDK's
vulkan_core.h and hasn't for some time.

cmake/mkvk.cmake

@@ -3,16 +3,18 @@
 
 # Code generation scripts that require a Vulkan SDK installation
 
-set(skip_mkvk_message "-> skipping mkvk target (this is harmless; only needed when re-generating of vulkan headers and dfdutils is required)")
+#set(skip_mkvk_message "-> skipping mkvk target (this is harmless; only needed when re-generating of vulkan headers and dfdutils is required)")
 
 if (NOT IOS)
-    # find_package doesn't find the Vulkan SDK when building for IOS.
-    # I haven't investigated why.
-    find_package(Vulkan)
-    if(NOT Vulkan_FOUND)
-        message(STATUS "Vulkan SDK not found ${skip_mkvk_message}")
-        return()
-    endif()
+# Not needed as local custom vulkan_core.h is used. Keeping
+# in case we go back to the standard one.
+#    # find_package doesn't find the Vulkan SDK when building for IOS.
+#    # I haven't investigated why.
+#    find_package(Vulkan)
+#    if(NOT Vulkan_FOUND)
+#        message(STATUS "Vulkan SDK not found ${skip_mkvk_message}")
+#        return()
+#    endif()
 else()
     # Skip mkvk. We don't need to run it when building for iOS.
     return()

lib/dfdutils/Makefile

@@ -7,19 +7,21 @@ targets := testcreatedfd testinterpretdfd testbidirectionalmapping doc
 
 all: $(addprefix out/,${targets})
 
+CFLAGS=-I.
+
 # Note. Currently we use an unreleased version of vulkan_core.h with enums
 # for ASTC 3D. Since this is temporary, the sources still use <angled>
 # includes. The -I. causes our local copy to be found while the VULKAN_SDK
 # part keeps compilers from warning that the file was not found with
 # <angled> include.
 $(out)/testcreatedfd: createdfd.c createdfdtest.c printdfd.c vk2dfd.c vk2dfd.inl KHR/khr_df.h dfd.h | out
-	gcc createdfdtest.c createdfd.c printdfd.c -I. $(if VULKAN_SDK,-I${VULKAN_SDK}/include) -o $@ -std=c99 -W -Wall -pedantic -O2 -Wno-strict-aliasing
+	gcc createdfdtest.c createdfd.c printdfd.c -I. $(if $(VULKAN_SDK),-I$(VULKAN_SDK)/include) -o $@ -std=c99 -W -Wall -pedantic -O2 -Wno-strict-aliasing -Wno-unused-parameter
 
 $(out)/testinterpretdfd: createdfd.c interpretdfd.c interpretdfdtest.c printdfd.c KHR/khr_df.h dfd.h | out
-	gcc interpretdfd.c createdfd.c interpretdfdtest.c printdfd.c -o $@ -I. $(if VULKAN_SDK,-I${VULKAN_SDK}/include) -O -W -Wall -std=c99 -pedantic
+	gcc interpretdfd.c createdfd.c interpretdfdtest.c printdfd.c -o $@ -I. $(if $(VULKAN_SDK),-I$(VULKAN_SDK)/include) -O -W -Wall -std=c99 -pedantic -Wno-unused-parameter
 
 $(out)/testbidirectionalmapping: testbidirectionalmapping.c interpretdfd.c createdfd.c dfd2vk.c dfd2vk.inl vk2dfd.c vk2dfd.inl KHR/khr_df.h dfd.h | out
-	gcc testbidirectionalmapping.c interpretdfd.c createdfd.c -o $@ -I. $(if VULKAN_SDK,-I${VULKAN_SDK}/include) -g -W -Wall -std=c99 -pedantic
+	gcc testbidirectionalmapping.c interpretdfd.c createdfd.c -o $@ -I. $(if $(VULKAN_SDK),-I$(VULKAN_SDK)/include) -g -W -Wall -std=c99 -pedantic -Wno-unused-parameter
 
 $(out)/doc: colourspaces.c createdfd.c createdfdtest.c printdfd.c queries.c KHR/khr_df.h dfd.h | out
 	doxygen dfdutils.doxy
@@ -28,20 +30,28 @@ build out:
 	mkdir -p $@
 
 clean:
+	rm -rf $(out)/dfd2vk.o $(out)/vk2dfd.o
 
 clobber: clean
 	rm -rf $(addprefix out/,${targets})
 
 doc: $(out)/doc
 
-switches: dfd2vk.inl vk2dfd.inl
+# Generate the switch bodies and test build the including code.
+switches: dfd2vk.inl $(out)/dfd2vk.o vk2dfd.inl $(out)/vk2dfd.o
 
 dfd2vk.inl: vulkan/vulkan_core.h makedfd2vk.pl
 	./makedfd2vk.pl $< $@
 
 vk2dfd.inl: vulkan/vulkan_core.h makevk2dfd.pl
 	./makevk2dfd.pl $< $@
 
+$(out)/vk2dfd.o: vk2dfd.c | $(out)
+	cc -c -o $@ -I . $<
+
+$(out)/dfd2vk.o: dfd2vk.c | $(out)
+	cc -c -o $@ -I . $<
+
 # For those who wish to generate a project from the gyp file so
 # as to use xcode for debugging.
 xcodeproj: build/project.pbxproj

lib/dfdutils/createdfdtest.c

@@ -8,7 +8,7 @@
 
 #define TESTRGB565 1
 
-int main()
+int main(int argc, char** argv)
 {
 #ifdef TESTRGBA8888
     uint32_t *DFD = createDFDUnpacked(0, 4, 1, 1, s_UNORM);