Layer synthesis method and device, equipment, medium and program product

The invention provides a layer synthesis method and device, equipment, a medium and a program product, and the method comprises the steps: firstly starting a layer synthesis process, then judging whether the layer state of a current frame accords with a preset synthesis scene, and enabling a display system to have a first number of layers in the preset synthesis scene; the first number of image layers comprise a scene in which a second number of image layers are not covered by other image layers and change in continuous frames, and if the first number of image layers accord with the scene in which the second number of image layers are not covered by other image layers and change in continuous frames, when it is determined that the display system is in a cache superposition mode, superposing the second number of image layers and the cache image layers to obtain a composite image layer, unchanged layers in the first number of layers are synthesized on the cache layer, so that layer synthesis in the current synt