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Diffstat (limited to 'WebCore/html/canvas/WebGLUnsignedShortArray.cpp')
-rw-r--r-- | WebCore/html/canvas/WebGLUnsignedShortArray.cpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/WebCore/html/canvas/WebGLUnsignedShortArray.cpp b/WebCore/html/canvas/WebGLUnsignedShortArray.cpp new file mode 100644 index 0000000..86fae8c --- /dev/null +++ b/WebCore/html/canvas/WebGLUnsignedShortArray.cpp @@ -0,0 +1,102 @@ +/* + * Copyright (C) 2009 Apple Inc. All rights reserved. + * Copyright (C) 2009 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" + +#if ENABLE(3D_CANVAS) + +#include "WebGLArrayBuffer.h" +#include "WebGLUnsignedShortArray.h" + +namespace WebCore { + +PassRefPtr<WebGLUnsignedShortArray> WebGLUnsignedShortArray::create(unsigned length) +{ + RefPtr<WebGLArrayBuffer> buffer = WebGLArrayBuffer::create(length * sizeof(unsigned short)); + return create(buffer, 0, length); +} + +PassRefPtr<WebGLUnsignedShortArray> WebGLUnsignedShortArray::create(unsigned short* array, unsigned length) +{ + RefPtr<WebGLUnsignedShortArray> a = WebGLUnsignedShortArray::create(length); + for (unsigned i = 0; i < length; ++i) + a->set(i, array[i]); + return a; +} + +PassRefPtr<WebGLUnsignedShortArray> WebGLUnsignedShortArray::create(PassRefPtr<WebGLArrayBuffer> buffer, + int byteOffset, + unsigned length) +{ + // Make sure the offset results in valid alignment. + if ((byteOffset % sizeof(unsigned short)) != 0) { + return NULL; + } + + if (buffer) { + // Check to make sure we are talking about a valid region of + // the given WebGLArrayBuffer's storage. + if ((byteOffset + (length * sizeof(unsigned short))) > buffer->byteLength()) + return NULL; + } + + return adoptRef(new WebGLUnsignedShortArray(buffer, byteOffset, length)); +} + +WebGLUnsignedShortArray::WebGLUnsignedShortArray(PassRefPtr<WebGLArrayBuffer> buffer, + int byteOffset, + unsigned length) + : WebGLArray(buffer, byteOffset) + , m_size(length) +{ +} + +unsigned WebGLUnsignedShortArray::length() const { + return m_size; +} + +unsigned WebGLUnsignedShortArray::byteLength() const { + return m_size * sizeof(unsigned short); +} + +PassRefPtr<WebGLArray> WebGLUnsignedShortArray::slice(unsigned offset, unsigned length) { + // Check to make sure the specified region is within the bounds of + // the WebGLArrayBuffer. + unsigned startByte = m_byteOffset + offset * sizeof(unsigned short); + unsigned limitByte = startByte + length * sizeof(unsigned short); + unsigned bufferLength = buffer()->byteLength(); + if (startByte >= bufferLength || limitByte > bufferLength) + return 0; + return create(buffer(), startByte, length); +} + +void WebGLUnsignedShortArray::set(WebGLUnsignedShortArray* array, unsigned offset, ExceptionCode& ec) { + setImpl(array, offset * sizeof(unsigned short), ec); +} + +} + +#endif // ENABLE(3D_CANVAS) |