blob: d87cae25063c76a7f7d03b26c8823f6e722179c4 [file] [log] [blame]
/*
* Copyright (C) 2009-2017 Apple 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 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 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"
#include "WebGLBuffer.h"
#if ENABLE(WEBGL)
#include "WebGLContextGroup.h"
#include "WebGLRenderingContextBase.h"
#include <JavaScriptCore/ArrayBuffer.h>
namespace WebCore {
Ref<WebGLBuffer> WebGLBuffer::create(WebGLRenderingContextBase& ctx)
{
return adoptRef(*new WebGLBuffer(ctx));
}
WebGLBuffer::WebGLBuffer(WebGLRenderingContextBase& ctx)
: WebGLSharedObject(ctx)
{
setObject(ctx.graphicsContext3D()->createBuffer());
clearCachedMaxIndices();
}
WebGLBuffer::~WebGLBuffer()
{
deleteObject(0);
}
void WebGLBuffer::deleteObjectImpl(GraphicsContext3D* context3d, Platform3DObject object)
{
context3d->deleteBuffer(object);
}
bool WebGLBuffer::associateBufferDataImpl(const void* data, GC3Dsizeiptr byteLength)
{
if (byteLength < 0)
return false;
switch (m_target) {
case GraphicsContext3D::ELEMENT_ARRAY_BUFFER:
if (byteLength > std::numeric_limits<unsigned>::max())
return false;
m_byteLength = byteLength;
clearCachedMaxIndices();
if (byteLength) {
m_elementArrayBuffer = ArrayBuffer::tryCreate(byteLength, 1);
if (!m_elementArrayBuffer) {
m_byteLength = 0;
return false;
}
if (data) {
// We must always clone the incoming data because client-side
// modifications without calling bufferData or bufferSubData
// must never be able to change the validation results.
memcpy(m_elementArrayBuffer->data(), data, byteLength);
}
} else
m_elementArrayBuffer = nullptr;
return true;
case GraphicsContext3D::ARRAY_BUFFER:
m_byteLength = byteLength;
return true;
default:
#if ENABLE(WEBGL2)
switch (m_target) {
case GraphicsContext3D::COPY_READ_BUFFER:
case GraphicsContext3D::COPY_WRITE_BUFFER:
case GraphicsContext3D::PIXEL_PACK_BUFFER:
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
case GraphicsContext3D::UNIFORM_BUFFER:
m_byteLength = byteLength;
return true;
}
#endif
return false;
}
}
bool WebGLBuffer::associateBufferData(GC3Dsizeiptr size)
{
return associateBufferDataImpl(nullptr, size);
}
bool WebGLBuffer::associateBufferData(ArrayBuffer* array)
{
if (!array)
return false;
return associateBufferDataImpl(array->data(), array->byteLength());
}
bool WebGLBuffer::associateBufferData(ArrayBufferView* array)
{
if (!array)
return false;
return associateBufferDataImpl(array->baseAddress(), array->byteLength());
}
bool WebGLBuffer::associateBufferSubDataImpl(GC3Dintptr offset, const void* data, GC3Dsizeiptr byteLength)
{
if (!data || offset < 0 || byteLength < 0)
return false;
if (byteLength) {
Checked<GC3Dintptr, RecordOverflow> checkedBufferOffset(offset);
Checked<GC3Dsizeiptr, RecordOverflow> checkedDataLength(byteLength);
Checked<GC3Dintptr, RecordOverflow> checkedBufferMax = checkedBufferOffset + checkedDataLength;
if (checkedBufferMax.hasOverflowed() || offset > m_byteLength || checkedBufferMax.unsafeGet() > m_byteLength)
return false;
}
switch (m_target) {
case GraphicsContext3D::ELEMENT_ARRAY_BUFFER:
clearCachedMaxIndices();
if (byteLength) {
if (!m_elementArrayBuffer)
return false;
memcpy(static_cast<unsigned char*>(m_elementArrayBuffer->data()) + offset, data, byteLength);
}
return true;
case GraphicsContext3D::ARRAY_BUFFER:
return true;
default:
#if ENABLE(WEBGL2)
switch (m_target) {
case GraphicsContext3D::COPY_READ_BUFFER:
case GraphicsContext3D::COPY_WRITE_BUFFER:
case GraphicsContext3D::PIXEL_PACK_BUFFER:
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
case GraphicsContext3D::UNIFORM_BUFFER:
return true;
}
#endif
return false;
}
}
bool WebGLBuffer::associateBufferSubData(GC3Dintptr offset, ArrayBuffer* array)
{
if (!array)
return false;
return associateBufferSubDataImpl(offset, array->data(), array->byteLength());
}
bool WebGLBuffer::associateBufferSubData(GC3Dintptr offset, ArrayBufferView* array)
{
if (!array)
return false;
return associateBufferSubDataImpl(offset, array->baseAddress(), array->byteLength());
}
bool WebGLBuffer::associateCopyBufferSubData(const WebGLBuffer& readBuffer, GC3Dintptr readOffset, GC3Dintptr writeOffset, GC3Dsizeiptr size)
{
if (readOffset < 0 || writeOffset < 0 || size < 0)
return false;
if (size) {
Checked<GC3Dintptr, RecordOverflow> checkedReadBufferOffset(readOffset);
Checked<GC3Dsizeiptr, RecordOverflow> checkedDataLength(size);
Checked<GC3Dintptr, RecordOverflow> checkedReadBufferMax = checkedReadBufferOffset + checkedDataLength;
if (checkedReadBufferMax.hasOverflowed() || readOffset > readBuffer.byteLength() || checkedReadBufferMax.unsafeGet() > readBuffer.byteLength())
return false;
Checked<GC3Dintptr, RecordOverflow> checkedWriteBufferOffset(writeOffset);
Checked<GC3Dintptr, RecordOverflow> checkedWriteBufferMax = checkedWriteBufferOffset + checkedDataLength;
if (checkedWriteBufferMax.hasOverflowed() || writeOffset > m_byteLength || checkedWriteBufferMax.unsafeGet() > m_byteLength)
return false;
}
switch (m_target) {
case GraphicsContext3D::ELEMENT_ARRAY_BUFFER:
clearCachedMaxIndices();
if (size) {
if (!m_elementArrayBuffer)
return false;
memcpy(static_cast<unsigned char*>(m_elementArrayBuffer->data()) + writeOffset, static_cast<const unsigned char*>(readBuffer.elementArrayBuffer()->data()) + readOffset, size);
}
return true;
case GraphicsContext3D::ARRAY_BUFFER:
return true;
default:
#if ENABLE(WEBGL2)
switch (m_target) {
case GraphicsContext3D::COPY_READ_BUFFER:
case GraphicsContext3D::COPY_WRITE_BUFFER:
case GraphicsContext3D::PIXEL_PACK_BUFFER:
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
case GraphicsContext3D::UNIFORM_BUFFER:
return true;
}
#endif
return false;
}
}
void WebGLBuffer::disassociateBufferData()
{
m_byteLength = 0;
clearCachedMaxIndices();
}
GC3Dsizeiptr WebGLBuffer::byteLength() const
{
return m_byteLength;
}
Optional<unsigned> WebGLBuffer::getCachedMaxIndex(GC3Denum type)
{
for (auto& cache : m_maxIndexCache) {
if (cache.type == type)
return cache.maxIndex;
}
return WTF::nullopt;
}
void WebGLBuffer::setCachedMaxIndex(GC3Denum type, unsigned value)
{
for (auto& cache : m_maxIndexCache) {
if (cache.type == type) {
cache.maxIndex = value;
return;
}
}
m_maxIndexCache[m_nextAvailableCacheEntry].type = type;
m_maxIndexCache[m_nextAvailableCacheEntry].maxIndex = value;
m_nextAvailableCacheEntry = (m_nextAvailableCacheEntry + 1) % WTF_ARRAY_LENGTH(m_maxIndexCache);
}
void WebGLBuffer::setTarget(GC3Denum target, bool forWebGL2)
{
// In WebGL, a buffer is bound to one target in its lifetime
if (m_target)
return;
if (target == GraphicsContext3D::ARRAY_BUFFER || target == GraphicsContext3D::ELEMENT_ARRAY_BUFFER)
m_target = target;
else if (forWebGL2) {
#if ENABLE(WEBGL2)
switch (target) {
case GraphicsContext3D::COPY_READ_BUFFER:
case GraphicsContext3D::COPY_WRITE_BUFFER:
case GraphicsContext3D::PIXEL_PACK_BUFFER:
case GraphicsContext3D::PIXEL_UNPACK_BUFFER:
case GraphicsContext3D::TRANSFORM_FEEDBACK_BUFFER:
case GraphicsContext3D::UNIFORM_BUFFER:
m_target = target;
}
#endif
}
}
void WebGLBuffer::clearCachedMaxIndices()
{
memset(m_maxIndexCache, 0, sizeof(m_maxIndexCache));
}
}
#endif // ENABLE(WEBGL)