1 files changed, 54 insertions, 1 deletions
diff --git a/Source/ThirdParty/ANGLE/src/libGLESv2/mathutil.h b/Source/ThirdParty/ANGLE/src/libGLESv2/mathutil.h
index 31fa16f..7ca2d9f 100644
--- a/Source/ThirdParty/ANGLE/src/libGLESv2/mathutil.h
+++ b/Source/ThirdParty/ANGLE/src/libGLESv2/mathutil.h
@@ -9,7 +9,9 @@
 #ifndef LIBGLESV2_MATHUTIL_H_
 #define LIBGLESV2_MATHUTIL_H_
 
+#include <intrin.h>
 #include <math.h>
+#include <windows.h>
 
 namespace gl
 {
@@ -38,9 +40,15 @@ inline unsigned int ceilPow2(unsigned int x)
     return x;
 }
 
+template<typename T, typename MIN, typename MAX>
+inline T clamp(T x, MIN min, MAX max)
+{
+    return x < min ? min : (x > max ? max : x);
+}
+
 inline float clamp01(float x)
 {
-    return x < 0 ? 0 : (x > 1 ? 1 : x);
+    return clamp(x, 0.0f, 1.0f);
 }
 
 template<const int n>
@@ -61,6 +69,51 @@ inline unsigned int unorm(float x)
         return (unsigned int)(max * x + 0.5f);
     }
 }
+
+inline RECT transformPixelRect(GLint x, GLint y, GLint w, GLint h, GLint surfaceHeight)
+{
+    RECT rect = {x,
+                 surfaceHeight - y - h,
+                 x + w,
+                 surfaceHeight - y};
+    return rect;
+}
+
+inline int transformPixelYOffset(GLint yoffset, GLint h, GLint surfaceHeight)
+{
+    return surfaceHeight - yoffset - h;
+}
+
+inline GLenum adjustWinding(GLenum winding)
+{
+    ASSERT(winding == GL_CW || winding == GL_CCW);
+    return winding == GL_CW ? GL_CCW : GL_CW;
+}
+
+inline bool supportsSSE2()
+{
+    static bool checked = false;
+    static bool supports = false;
+
+    if (checked)
+    {
+        return supports;
+    }
+
+    int info[4];
+    __cpuid(info, 0);
+    
+    if (info[0] >= 1)
+    {
+        __cpuid(info, 1);
+
+        supports = (info[3] >> 26) & 1;
+    }
+
+    checked = true;
+
+    return supports;
+}
 }
 
 #endif   // LIBGLESV2_MATHUTIL_H_