274 lines
8.8 KiB
C++
274 lines
8.8 KiB
C++
/*
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* Copyright (C) 2009-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "WebGLBuffer.h"
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#if ENABLE(WEBGL)
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#include "WebGLContextGroup.h"
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#include "WebGLRenderingContextBase.h"
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#include <JavaScriptCore/ArrayBuffer.h>
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#include <wtf/Lock.h>
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#include <wtf/Locker.h>
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namespace WebCore {
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Ref<WebGLBuffer> WebGLBuffer::create(WebGLRenderingContextBase& ctx)
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{
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return adoptRef(*new WebGLBuffer(ctx));
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}
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WebGLBuffer::WebGLBuffer(WebGLRenderingContextBase& ctx)
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: WebGLSharedObject(ctx)
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{
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setObject(ctx.graphicsContextGL()->createBuffer());
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clearCachedMaxIndices();
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}
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WebGLBuffer::~WebGLBuffer()
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{
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if (!hasGroupOrContext())
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return;
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runDestructor();
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}
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void WebGLBuffer::deleteObjectImpl(const AbstractLocker&, GraphicsContextGL* context3d, PlatformGLObject object)
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{
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context3d->deleteBuffer(object);
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}
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bool WebGLBuffer::associateBufferDataImpl(const void* data, GCGLsizeiptr byteLength)
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{
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if (byteLength < 0)
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return false;
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switch (m_target) {
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case GraphicsContextGL::ELEMENT_ARRAY_BUFFER:
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if (byteLength > std::numeric_limits<unsigned>::max())
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return false;
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m_byteLength = byteLength;
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clearCachedMaxIndices();
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if (byteLength) {
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m_elementArrayBuffer = ArrayBuffer::tryCreate(byteLength, 1);
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if (!m_elementArrayBuffer) {
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m_byteLength = 0;
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return false;
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}
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if (data) {
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// We must always clone the incoming data because client-side
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// modifications without calling bufferData or bufferSubData
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// must never be able to change the validation results.
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memcpy(m_elementArrayBuffer->data(), data, byteLength);
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}
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} else
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m_elementArrayBuffer = nullptr;
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return true;
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case GraphicsContextGL::ARRAY_BUFFER:
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m_byteLength = byteLength;
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return true;
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default:
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#if ENABLE(WEBGL2)
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switch (m_target) {
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case GraphicsContextGL::COPY_READ_BUFFER:
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case GraphicsContextGL::COPY_WRITE_BUFFER:
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case GraphicsContextGL::PIXEL_PACK_BUFFER:
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case GraphicsContextGL::PIXEL_UNPACK_BUFFER:
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case GraphicsContextGL::TRANSFORM_FEEDBACK_BUFFER:
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case GraphicsContextGL::UNIFORM_BUFFER:
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m_byteLength = byteLength;
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return true;
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}
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#endif
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return false;
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}
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}
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bool WebGLBuffer::associateBufferData(GCGLsizeiptr size)
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{
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return associateBufferDataImpl(nullptr, size);
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}
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bool WebGLBuffer::associateBufferData(ArrayBuffer* array)
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{
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if (!array)
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return false;
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return associateBufferDataImpl(array->data(), array->byteLength());
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}
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bool WebGLBuffer::associateBufferData(ArrayBufferView* array)
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{
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if (!array)
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return false;
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return associateBufferDataImpl(array->baseAddress(), array->byteLength());
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}
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bool WebGLBuffer::associateBufferSubDataImpl(GCGLintptr offset, const void* data, GCGLsizeiptr byteLength)
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{
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if (!data || offset < 0 || byteLength < 0)
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return false;
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if (byteLength) {
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Checked<GCGLintptr, RecordOverflow> checkedBufferOffset(offset);
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Checked<GCGLsizeiptr, RecordOverflow> checkedDataLength(byteLength);
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Checked<GCGLintptr, RecordOverflow> checkedBufferMax = checkedBufferOffset + checkedDataLength;
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if (checkedBufferMax.hasOverflowed() || offset > m_byteLength || checkedBufferMax > m_byteLength)
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return false;
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}
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switch (m_target) {
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case GraphicsContextGL::ELEMENT_ARRAY_BUFFER:
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clearCachedMaxIndices();
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if (byteLength) {
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if (!m_elementArrayBuffer)
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return false;
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memcpy(static_cast<unsigned char*>(m_elementArrayBuffer->data()) + offset, data, byteLength);
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}
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return true;
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case GraphicsContextGL::ARRAY_BUFFER:
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return true;
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default:
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#if ENABLE(WEBGL2)
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switch (m_target) {
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case GraphicsContextGL::COPY_READ_BUFFER:
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case GraphicsContextGL::COPY_WRITE_BUFFER:
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case GraphicsContextGL::PIXEL_PACK_BUFFER:
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case GraphicsContextGL::PIXEL_UNPACK_BUFFER:
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case GraphicsContextGL::TRANSFORM_FEEDBACK_BUFFER:
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case GraphicsContextGL::UNIFORM_BUFFER:
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return true;
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}
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#endif
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return false;
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}
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}
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bool WebGLBuffer::associateBufferSubData(GCGLintptr offset, ArrayBuffer* array)
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{
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if (!array)
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return false;
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return associateBufferSubDataImpl(offset, array->data(), array->byteLength());
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}
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bool WebGLBuffer::associateBufferSubData(GCGLintptr offset, ArrayBufferView* array)
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{
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if (!array)
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return false;
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return associateBufferSubDataImpl(offset, array->baseAddress(), array->byteLength());
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}
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bool WebGLBuffer::associateCopyBufferSubData(const WebGLBuffer& readBuffer, GCGLintptr readOffset, GCGLintptr writeOffset, GCGLsizeiptr size)
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{
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if (readOffset < 0 || writeOffset < 0 || size < 0)
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return false;
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if (size) {
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Checked<GCGLintptr, RecordOverflow> checkedReadBufferOffset(readOffset);
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Checked<GCGLsizeiptr, RecordOverflow> checkedDataLength(size);
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Checked<GCGLintptr, RecordOverflow> checkedReadBufferMax = checkedReadBufferOffset + checkedDataLength;
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if (checkedReadBufferMax.hasOverflowed() || readOffset > readBuffer.byteLength() || checkedReadBufferMax > readBuffer.byteLength())
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return false;
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Checked<GCGLintptr, RecordOverflow> checkedWriteBufferOffset(writeOffset);
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Checked<GCGLintptr, RecordOverflow> checkedWriteBufferMax = checkedWriteBufferOffset + checkedDataLength;
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if (checkedWriteBufferMax.hasOverflowed() || writeOffset > m_byteLength || checkedWriteBufferMax > m_byteLength)
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return false;
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}
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switch (m_target) {
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case GraphicsContextGL::ELEMENT_ARRAY_BUFFER:
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clearCachedMaxIndices();
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if (size) {
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if (!m_elementArrayBuffer)
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return false;
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memcpy(static_cast<unsigned char*>(m_elementArrayBuffer->data()) + writeOffset, static_cast<const unsigned char*>(readBuffer.elementArrayBuffer()->data()) + readOffset, size);
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}
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return true;
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case GraphicsContextGL::ARRAY_BUFFER:
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return true;
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default:
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#if ENABLE(WEBGL2)
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switch (m_target) {
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case GraphicsContextGL::COPY_READ_BUFFER:
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case GraphicsContextGL::COPY_WRITE_BUFFER:
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case GraphicsContextGL::PIXEL_PACK_BUFFER:
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case GraphicsContextGL::PIXEL_UNPACK_BUFFER:
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case GraphicsContextGL::TRANSFORM_FEEDBACK_BUFFER:
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case GraphicsContextGL::UNIFORM_BUFFER:
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return true;
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}
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#endif
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return false;
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}
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}
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void WebGLBuffer::disassociateBufferData()
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{
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m_byteLength = 0;
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clearCachedMaxIndices();
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}
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GCGLsizeiptr WebGLBuffer::byteLength() const
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{
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return m_byteLength;
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}
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std::optional<unsigned> WebGLBuffer::getCachedMaxIndex(GCGLenum type)
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{
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for (auto& cache : m_maxIndexCache) {
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if (cache.type == type)
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return cache.maxIndex;
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}
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return std::nullopt;
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}
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void WebGLBuffer::setCachedMaxIndex(GCGLenum type, unsigned value)
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{
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for (auto& cache : m_maxIndexCache) {
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if (cache.type == type) {
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cache.maxIndex = value;
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return;
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}
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}
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m_maxIndexCache[m_nextAvailableCacheEntry].type = type;
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m_maxIndexCache[m_nextAvailableCacheEntry].maxIndex = value;
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m_nextAvailableCacheEntry = (m_nextAvailableCacheEntry + 1) % WTF_ARRAY_LENGTH(m_maxIndexCache);
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}
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void WebGLBuffer::setTarget(GCGLenum target)
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{
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m_target = target;
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}
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void WebGLBuffer::clearCachedMaxIndices()
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{
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memset(m_maxIndexCache, 0, sizeof(m_maxIndexCache));
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}
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}
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#endif // ENABLE(WEBGL)
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