00001 /* surface / context tracking */ 00002 00003 00004 /* 00005 00006 context A: 00007 render to texture T 00008 00009 context B: 00010 texture from T 00011 00012 ----------------------- 00013 00014 flush surface: 00015 which contexts are bound to the surface? 00016 00017 ----------------------- 00018 00019 glTexSubImage(): 00020 which contexts need to be flushed? 00021 00022 */ 00023 00024 00025 /* 00026 00027 in MakeCurrent(): 00028 00029 call sct_bind_surfaces(context, list of surfaces) to update the 00030 dependencies between context and surfaces 00031 00032 00033 in SurfaceFlush(), or whatever it is in D3D: 00034 00035 call sct_get_surface_contexts(surface) to get a list of contexts 00036 which are currently bound to the surface. 00037 00038 00039 00040 in BindTexture(): 00041 00042 call sct_bind_texture(context, texture) to indicate that the texture 00043 is used in the scene. 00044 00045 00046 in glTexSubImage() or RenderToTexture(): 00047 00048 call sct_is_texture_used(context, texture) to determine if the texture 00049 has been used in the scene, but the scene's not flushed. If TRUE is 00050 returned it means the scene has to be rendered/flushed before the contents 00051 of the texture can be changed. 00052 00053 00054 in psb_scene_flush/terminate(): 00055 00056 call sct_flush_textures(context) to tell the SCT that the textures which 00057 were used in the scene can be released. 00058 00059 00060 00061 */
1.5.4