Method setFrameBuffer

3rdparty/bgfx/src/renderer_vk.cpp:2949–3034

		}

		void setFrameBuffer(FrameBufferHandle _fbh, bool _acquire = true)
		{
			BGFX_PROFILER_SCOPE("RendererContextVK::setFrameBuffer()", kColorFrame);

			BX_ASSERT(false
				  ||  isValid(_fbh)
				  ||  NULL != m_backBuffer.m_nwh
				, "Rendering to backbuffer in headless mode."
				);

			FrameBufferVK& newFrameBuffer = isValid(_fbh)
				? m_frameBuffers[_fbh.idx]
				: m_backBuffer
				;

			FrameBufferVK& oldFrameBuffer = isValid(m_fbh)
				? m_frameBuffers[m_fbh.idx]
				: m_backBuffer
				;

			if (NULL == oldFrameBuffer.m_nwh
			&&  m_fbh.idx != _fbh.idx)
			{
				oldFrameBuffer.resolve();

				for (uint8_t ii = 0, num = oldFrameBuffer.m_num; ii < num; ++ii)
				{
					TextureVK& texture = m_textures[oldFrameBuffer.m_texture[ii].idx];
					texture.setImageMemoryBarrier(m_commandBuffer, texture.m_sampledLayout);
					if (VK_NULL_HANDLE != texture.m_singleMsaaImage)
					{
						texture.setImageMemoryBarrier(m_commandBuffer, texture.m_sampledLayout, true);
					}
				}

				if (isValid(oldFrameBuffer.m_depth) )
				{
					TextureVK& texture = m_textures[oldFrameBuffer.m_depth.idx];
					const bool writeOnly  = 0 != (texture.m_flags&BGFX_TEXTURE_RT_WRITE_ONLY);

					if (!writeOnly)
					{
						texture.setImageMemoryBarrier(m_commandBuffer, texture.m_sampledLayout);
					}
				}
			}

			if (NULL == newFrameBuffer.m_nwh)
			{
				for (uint8_t ii = 0, num = newFrameBuffer.m_num; ii < num; ++ii)
				{
					TextureVK& texture = m_textures[newFrameBuffer.m_texture[ii].idx];
					texture.setImageMemoryBarrier(
						  m_commandBuffer
						, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
						);
				}