Method create_encoder

compute/vulkan/vulkan_kernel.cpp:157–216

}

shared_ptr<vulkan_encoder> vulkan_kernel::create_encoder(const compute_queue& cqueue,
														 const vulkan_command_buffer* cmd_buffer_,
														 const VkPipeline pipeline,
														 const VkPipelineLayout pipeline_layout,
														 const vector<const vulkan_kernel_entry*>& entries,
														 const char* debug_label floor_unused_if_release,
														 bool& success) const {
	success = false;
	if (entries.empty()) return {};
	
	// create a command buffer if none was specified
	vulkan_command_buffer cmd_buffer;
	if (cmd_buffer_ == nullptr) {
		cmd_buffer = ((const vulkan_queue&)cqueue).make_command_buffer("encoder");
		if(cmd_buffer.cmd_buffer == nullptr) return {}; // just abort
		
		// begin recording
		const VkCommandBufferBeginInfo begin_info {
			.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
			.pNext = nullptr,
			.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT,
			.pInheritanceInfo = nullptr,
		};
		VK_CALL_RET(vkBeginCommandBuffer(cmd_buffer.cmd_buffer, &begin_info),
					"failed to begin command buffer", {})
	} else {
		cmd_buffer = *(const vulkan_command_buffer*)cmd_buffer_;
	}
	
	const auto& vk_dev = (const vulkan_device&)cqueue.get_device();
	
#if defined(FLOOR_DEBUG)
	string encoder_label = "encoder_"s + (entries[0]->stage_info.stage == VK_SHADER_STAGE_COMPUTE_BIT ? "compute" : "graphics");
	if (entries[0]->info) {
		encoder_label += "_" + entries[0]->info->name;
	}
	if (debug_label) {
		encoder_label += '#';
		encoder_label += debug_label;
	}
	((const vulkan_compute*)vk_dev.context)->vulkan_begin_cmd_debug_label(cmd_buffer.cmd_buffer, encoder_label);
#endif
	
	vkCmdBindPipeline(cmd_buffer.cmd_buffer,
					  entries[0]->stage_info.stage == VK_SHADER_STAGE_COMPUTE_BIT ?
					  VK_PIPELINE_BIND_POINT_COMPUTE : VK_PIPELINE_BIND_POINT_GRAPHICS,
					  pipeline);
	
	auto encoder = make_shared<vulkan_encoder>(vulkan_encoder {
		.cmd_buffer = cmd_buffer,
		.cqueue = (const vulkan_queue&)cqueue,
		.device = vk_dev,
		.pipeline = pipeline,
		.pipeline_layout = pipeline_layout,
		.entries = entries,
	});
	
	success = true;