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 #include "config.h" 28 29 #if ENABLE(3D_CANVAS) 30 31 #include "WebGLFloatArray.h" 32 33 namespace WebCore { 34 35 PassRefPtr<WebGLFloatArray> WebGLFloatArray::create(unsigned length) 36 { 37 RefPtr<WebGLArrayBuffer> buffer = WebGLArrayBuffer::create(length * sizeof(float)); 38 return create(buffer, 0, length); 39 } 40 41 PassRefPtr<WebGLFloatArray> WebGLFloatArray::create(float* array, unsigned length) 42 { 43 RefPtr<WebGLFloatArray> a = WebGLFloatArray::create(length); 44 for (unsigned i = 0; i < length; ++i) 45 a->set(i, array[i]); 46 return a; 47 } 48 49 PassRefPtr<WebGLFloatArray> WebGLFloatArray::create(PassRefPtr<WebGLArrayBuffer> buffer, int byteOffset, unsigned length) 50 { 51 // Make sure the offset results in valid alignment. 52 if ((byteOffset % sizeof(float)) != 0) 53 return NULL; 54 55 if (buffer) { 56 // Check to make sure we are talking about a valid region of 57 // the given WebGLArrayBuffer's storage. 58 if ((byteOffset + (length * sizeof(float))) > buffer->byteLength()) 59 return NULL; 60 } 61 return adoptRef(new WebGLFloatArray(buffer, byteOffset, length)); 62 } 63 64 WebGLFloatArray::WebGLFloatArray(PassRefPtr<WebGLArrayBuffer> buffer, int byteOffset, unsigned length) 65 : WebGLArray(buffer, byteOffset) 66 , m_size(length) 67 { 68 } 69 70 unsigned WebGLFloatArray::length() const { 71 return m_size; 72 } 73 74 unsigned WebGLFloatArray::byteLength() const { 75 return m_size * sizeof(float); 76 } 77 78 PassRefPtr<WebGLArray> WebGLFloatArray::slice(unsigned offset, unsigned length) { 79 // Check to make sure the specified region is within the bounds of 80 // the WebGLArrayBuffer. 81 unsigned startByte = m_byteOffset + offset * sizeof(float); 82 unsigned limitByte = startByte + length * sizeof(float); 83 unsigned bufferLength = buffer()->byteLength(); 84 if (startByte >= bufferLength || limitByte > bufferLength) 85 return 0; 86 return create(buffer(), startByte, length); 87 } 88 89 void WebGLFloatArray::set(WebGLFloatArray* array, unsigned offset, ExceptionCode& ec) { 90 setImpl(array, offset * sizeof(float), ec); 91 } 92 93 } 94 95 #endif // ENABLE(3D_CANVAS) 96
