void GLES2HardwareIndexBuffer::copyData(HardwareBuffer& srcBuffer, size_t srcOffset,
size_t dstOffset, size_t length, bool discardWholeBuffer)
{
// If the buffer is not in system memory we can use ARB_copy_buffers to do an optimised copy.
if (srcBuffer.isSystemMemory())
{
HardwareBuffer::copyData(srcBuffer, srcOffset, dstOffset, length, discardWholeBuffer);
}
else
{
// Unbind the current buffer
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
// Zero out this(destination) buffer
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mBufferId));
OGRE_CHECK_GL_ERROR(glBufferData(GL_ELEMENT_ARRAY_BUFFER, length, 0, GLES2HardwareBufferManager::getGLUsage(mUsage)));
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
// Do it the fast way.
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_COPY_READ_BUFFER, static_cast<GLES2HardwareIndexBuffer &>(srcBuffer).getGLBufferId()));
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_COPY_WRITE_BUFFER, mBufferId));
OGRE_CHECK_GL_ERROR(glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, srcOffset, dstOffset, length));
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_COPY_READ_BUFFER, 0));
OGRE_CHECK_GL_ERROR(glBindBuffer(GL_COPY_WRITE_BUFFER, 0));
}
}
//---------------------------------------------------------------------
void D3D11HardwareUniformBuffer::copyData(HardwareBuffer& srcBuffer, size_t srcOffset,
size_t dstOffset, size_t length, bool discardWholeBuffer)
{
// check if the other buffer is also a D3D11HardwareVertexBuffer
if (srcBuffer.isSystemMemory())
{
// src is not a D3D11HardwareVertexBuffer - use default copy
HardwareBuffer::copyData(srcBuffer, srcOffset, dstOffset, length, discardWholeBuffer);
}
else
{
// src is a D3D11HardwareUniformBuffer use d3d11 optimized copy
D3D11HardwareUniformBuffer& d3dBuf = static_cast<D3D11HardwareUniformBuffer&>(srcBuffer);
mBufferImpl->copyData(*(d3dBuf.mBufferImpl), srcOffset, dstOffset, length, discardWholeBuffer);
}
}
void GL3PlusHardwareIndexBuffer::copyData(HardwareBuffer& srcBuffer, size_t srcOffset,
size_t dstOffset, size_t length, bool discardWholeBuffer)
{
// If the buffer is not in system memory we can use ARB_copy_buffers to do an optimised copy.
if (srcBuffer.isSystemMemory())
{
HardwareBuffer::copyData(srcBuffer, srcOffset, dstOffset, length, discardWholeBuffer);
}
else
{
if(mUseShadowBuffer) {
mShadowBuffer->copyData(srcBuffer, srcOffset, dstOffset, length, discardWholeBuffer);
}
mBuffer.copyData(static_cast<GL3PlusHardwareIndexBuffer&>(srcBuffer).getGLBufferId(),
srcOffset, dstOffset, length, discardWholeBuffer);
}
}