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