A Hybrid Rendering Pipeline Combining CPU Rasterization and GPU Upscaling

Abstract

In this paper, we present a hybrid rendering approach that combines CPU-based software rendering with GPU-accelerated image upscaling. The method allows developers to perform computationally heavy pixel-level operations at a lower resolution on the CPU and then efficiently upscale the result to the display resolution using hardware acceleration. This design significantly reduces CPU workload while maintaining visual fidelity, offering a practical solution for educational renderers, retro-style graphics, or systems without full GPU rendering pipelines. Experimental results show that this approach provides a balanced trade-off between performance and image quality, making it suitable for lightweight rendering engines and research in computer graphics optimization.