1 /* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * Copyright (C) 2009 Google Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef WebGLUnsignedShortArray_h 28 #define WebGLUnsignedShortArray_h 29 30 #include "WebGLArray.h" 31 #include <limits> 32 #include <wtf/MathExtras.h> 33 #include <wtf/PassRefPtr.h> 34 #include <wtf/RefCounted.h> 35 36 namespace WebCore { 37 38 class WebGLUnsignedShortArray : public WebGLArray { 39 public: 40 virtual bool isUnsignedShortArray() const { return true; } 41 42 static PassRefPtr<WebGLUnsignedShortArray> create(unsigned length); 43 static PassRefPtr<WebGLUnsignedShortArray> create(unsigned short* array, unsigned length); 44 static PassRefPtr<WebGLUnsignedShortArray> create(PassRefPtr<WebGLArrayBuffer> buffer, int byteOffset, unsigned length); 45 46 unsigned short* data() { return static_cast<unsigned short*>(baseAddress()); } 47 48 virtual unsigned length() const; 49 virtual unsigned byteLength() const; 50 virtual PassRefPtr<WebGLArray> slice(unsigned offset, unsigned length); 51 52 void set(unsigned index, double value) 53 { 54 if (index >= m_size) 55 return; 56 if (isnan(value)) // Clamp NaN to 0 57 value = 0; 58 if (value < std::numeric_limits<unsigned short>::min()) 59 value = std::numeric_limits<unsigned short>::min(); 60 else if (value > std::numeric_limits<unsigned short>::max()) 61 value = std::numeric_limits<unsigned short>::max(); 62 unsigned short* storage = static_cast<unsigned short*>(m_baseAddress); 63 storage[index] = static_cast<unsigned short>(value); 64 } 65 66 bool get(unsigned index, unsigned short& result) const 67 { 68 if (index >= m_size) 69 return false; 70 unsigned short* storage = static_cast<unsigned short*>(m_baseAddress); 71 result = storage[index]; 72 return true; 73 } 74 75 unsigned short get(unsigned index) const 76 { 77 return item(index); 78 } 79 80 unsigned short item(unsigned index) const 81 { 82 ASSERT(index < m_size); 83 unsigned short* storage = static_cast<unsigned short*>(m_baseAddress); 84 return storage[index]; 85 } 86 87 void set(WebGLUnsignedShortArray* array, unsigned offset, ExceptionCode& ec); 88 89 private: 90 WebGLUnsignedShortArray(PassRefPtr<WebGLArrayBuffer> buffer,int byteOffset,unsigned length); 91 unsigned m_size; 92 }; 93 94 } // namespace WebCore 95 96 #endif // WebGLUnsignedShortArray_h 97
