pixman-wasm.patch

--- a/pixman/pixman/pixman-x86.c
+++ b/pixman/pixman/pixman-x86.c
@@ -74,10 +74,12 @@ detect_cpu_features (void)
 
 #else
 
-#if defined (__GNUC__)
+#if defined (__GNUC__) && !defined(__EMSCRIPTEN__)
 #include <cpuid.h>
 #endif
 
+#if !defined(__EMSCRIPTEN__)
+
 static void
 pixman_cpuid (uint32_t feature,
 	      uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d)
@@ -98,10 +100,17 @@ pixman_cpuid (uint32_t feature,
 #error Unknown compiler
 #endif
 }
+ 
+#endif // !__EMSCRIPTEN__
 
 static cpu_features_t
 detect_cpu_features (void)
 {
+#if defined(__EMSCRIPTEN__)
+
+    return X86_MMX | X86_MMX_EXTENSIONS | X86_SSE | X86_SSE2;
+
+#else
     uint32_t a, b, c, d;
     cpu_features_t features = 0;
 
@@ -147,6 +156,8 @@ detect_cpu_features (void)
     }
 
     return features;
+
+#endif // !__EMSCRIPTEN__
 }
 
 #endif
--- a/pixman/pixman/pixman-ssse3.c
+++ b/pixman/pixman/pixman-ssse3.c
@@ -28,7 +28,9 @@
 #endif
 
 #include <stdlib.h>
+#if !defined(__EMSCRIPTEN__)
 #include <mmintrin.h>
+#endif
 #include <xmmintrin.h>
 #include <emmintrin.h>
 #include <tmmintrin.h>
--- a/pixman/meson.build
+++ b/pixman/meson.build
@@ -160,14 +160,16 @@ elif cc.get_id() != 'msvc'
   sse2_flags = ['-msse2', '-Winline']
 endif
 if not use_sse2.disabled()
-  if host_machine.cpu_family() == 'x86'
+  # if host_machine.cpu_family() == 'x86'
     if cc.compiles('''
         #if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2))
-        #   if !defined(__amd64__) && !defined(__x86_64__)
+        #   if !defined(__amd64__) && !defined(__x86_64__) && !defined(__EMSCRIPTEN__)
         #      error "Need GCC >= 4.2 for SSE2 intrinsics on x86"
         #   endif
         #endif
-        #include <mmintrin.h>
+        #ifndef __EMSCRIPTEN__
+        #  include <mmintrin.h>
+        #endif
         #include <xmmintrin.h>
         #include <emmintrin.h>
         int param;
@@ -180,7 +182,7 @@ if not use_sse2.disabled()
         name : 'SSE2 Intrinsic Support')
       have_sse2 = true
     endif
-  elif host_machine.cpu_family() == 'x86_64'
+  if host_machine.cpu_family() == 'x86_64'
     have_sse2 = true
   endif
 endif
@@ -200,11 +200,14 @@ endif
 
 # x64 pre-2010 MSVC compilers crashes when building the ssse3 code
 if not use_ssse3.disabled() and not (cc.get_id() == 'msvc' and cc.version().version_compare('<16') and host_machine.cpu_family() == 'x86_64')
-  if host_machine.cpu_family().startswith('x86')
+  # if host_machine.cpu_family().startswith('x86')
     if cc.compiles('''
-        #include <mmintrin.h>
+        #ifndef __EMSCRIPTEN__
+        #  include <mmintrin.h>
+        #endif
         #include <xmmintrin.h>
         #include <emmintrin.h>
+        #include <tmmintrin.h>
         int param;
         int main () {
           __m128i a = _mm_set1_epi32 (param), b = _mm_set1_epi32 (param + 1), c;
@@ -215,7 +218,7 @@ if not use_ssse3.disabled() and not (cc.get_id() == 'msvc' and cc.version().vers
         name : 'SSSE3 Intrinsic Support')
       have_ssse3 = true
     endif
-  endif
+  # endif
 endif
 
 if have_ssse3