[GeometryInterface] Add fromFloat32Array & fromFloat64Array function

third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/DOMMatrix.h"
 
 namespace blink {
 
 DOMMatrixReadOnly* DOMMatrixReadOnly::create(Vector<double> sequence, ExceptionState& exceptionState)
 {
@@ skipping 16 matching lines @@
             sequence[0], sequence[1], sequence[2], sequence[3],
             sequence[4], sequence[5], sequence[6], sequence[7],
             sequence[8], sequence[9], sequence[10], sequence[11],
             sequence[12], sequence[13], sequence[14], sequence[15]);
         m_is2D = false;
     } else {
         NOTREACHED();
     }
 }
 
+DOMMatrixReadOnly* DOMMatrixReadOnly::fromFloat32Array(DOMFloat32Array* float32Array, ExceptionState& exceptionState)
+{
+    if (float32Array->length() != 6 && float32Array->length() != 16) {
+        exceptionState.throwTypeError("An invalid number sequence is specified. The sequence must contain 6 elements for 2D matrix and 16 elements for 3D matrix.");
+        return nullptr;
+    }
+    return new DOMMatrixReadOnly(float32Array);
+}
+
+DOMMatrixReadOnly::DOMMatrixReadOnly(DOMFloat32Array* float32Array)
+{
+    float* array = float32Array->data();
+    if (float32Array->length() == 6) {

[zino, 2016/09/04 23:11:53]

This logic is duplicated with below constructor. (and another constructor taking
Vector<double> as parameter)

Can we use template instead of duplicated codes?

[Hwanseung Lee, 2016/09/05 12:58:47]

i did resolve it.

+        m_matrix = TransformationMatrix::create(
+            array[0], array[1], array[2], array[3],
+            array[4], array[5]);
+        m_is2D = true;
+    } else if (float32Array->length() == 16) {
+        m_matrix = TransformationMatrix::create(
+            array[0], array[1], array[2], array[3],
+            array[4], array[5], array[6], array[7],
+            array[8], array[9], array[10], array[11],
+            array[12], array[13], array[14], array[15]);
+        m_is2D = false;
+    } else {
+        NOTREACHED();
+    }
+}
+
+DOMMatrixReadOnly* DOMMatrixReadOnly::fromFloat64Array(DOMFloat64Array* float64Array, ExceptionState& exceptionState)
+{
+    if (float64Array->length() != 6 && float64Array->length() != 16) {
+        exceptionState.throwTypeError("An invalid number sequence is specified. The sequence must contain 6 elements for 2D matrix and 16 elements for 3D matrix.");
+        return nullptr;
+    }
+    return new DOMMatrixReadOnly(float64Array);
+}
+
+DOMMatrixReadOnly::DOMMatrixReadOnly(DOMFloat64Array* float64Array)
+{
+    double* array = float64Array->data();
+    if (float64Array->length() == 6) {
+        m_matrix = TransformationMatrix::create(
+            array[0], array[1], array[2], array[3],
+            array[4], array[5]);
+        m_is2D = true;
+    } else if (float64Array->length() == 16) {
+        m_matrix = TransformationMatrix::create(
+            array[0], array[1], array[2], array[3],
+            array[4], array[5], array[6], array[7],
+            array[8], array[9], array[10], array[11],
+            array[12], array[13], array[14], array[15]);
+        m_is2D = false;
+    } else {
+        NOTREACHED();
+    }
+}
+
 DOMMatrixReadOnly::~DOMMatrixReadOnly()
 {
 }
 
 bool DOMMatrixReadOnly::is2D() const
 {
     return m_is2D;
 }
 
 bool DOMMatrixReadOnly::isIdentity() const
@@ skipping 99 matching lines @@
         << m21() << ", " << m22() << ", " << m23() << ", " << m24() << ", "
         << m31() << ", " << m32() << ", " << m33() << ", " << m34() << ", "
         << m41() << ", " << m42() << ", " << m43() << ", " << m44();
     }
     stream << ")";
 
     return String(stream.str().c_str());
 }
 
 } // namespace blink