[pixman] arm/arm64 windows support (microsoft#6117)

* fixes pixman arm/arm64 windows build

* bump pixman version to 0.38.0-2

ports/pixman/CMakeLists.txt

@@ -41,21 +41,29 @@ file(GLOB SOURCES
 "pixman-timer.c"
 "pixman-trap.c"
 "pixman-utils.c"
-"pixman-sse2.c"
 )
 
-add_library(pixman-1 ${SOURCES})
-target_include_directories(pixman-1 PUBLIC $<INSTALL_INTERFACE:include>)
-
-# pixman requires the three PACKAGE* definitions in order to compile. The USE_SSE2 definition lets it use SSE2 instructions for speed. Every target machine should have SSE2 these days.
-target_compile_definitions(pixman-1
+# pixman requires the three PACKAGE* definitions in order to compile.
+set(PIXMAN_DEFS 
     PRIVATE
-        PACKAGE="pixman-1"
-        PACKAGE_VERSION="0.34.0"
-        PACKAGE_BUGREPORT=""
-        USE_SSE2
+    PACKAGE="pixman-1"
+    PACKAGE_VERSION="0.34.0"
+    PACKAGE_BUGREPORT=""
 )
 
+if(VCPKG_TARGET_TRIPLET STREQUAL arm64-windows OR VCPKG_TARGET_TRIPLET STREQUAL arm-windows)
+    # don't enable SSE2 for arm64-windows and arm-windows
+else()
+    # The USE_SSE2 definition lets it use SSE2 instructions for speed. Every x86/64 target machine should have SSE2 these days.
+    set(PIXMAN_DEFS ${PIXMAN_DEFS} USE_SSE2)
+    file(GLOB SSE2_SOURCES "pixman-sse2.c")
+    set(SOURCES ${SOURCES} ${SSE2_SOURCES})
+endif()
+
+add_library(pixman-1 ${SOURCES})
+target_include_directories(pixman-1 PUBLIC $<INSTALL_INTERFACE:include>)
+target_compile_definitions(pixman-1 ${PIXMAN_DEFS})
+
 if(UNIX AND CMAKE_SIZEOF_VOID_P EQUAL 4)
     target_compile_options(pixman-1 PRIVATE -msse2)
 endif()

ports/pixman/CONTROL

@@ -1,3 +1,3 @@
 Source: pixman
-Version: 0.38.0-1
+Version: 0.38.0-2
 Description: Pixman is a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterization.