mirror of https://github.com/godotengine/godot
acf439e96d
Fixes #90017 Fixes #90030 Fixes #98044 This PR makes the following changes: # Force processing of GPU commands for frame_count frames The variable `frames_pending_resources_for_processing` is added to track this. The ticket #98044 suggested to use `_flush_and_stall_for_all_frames()` while minimized. Technically this works and is a viable solution. However I noticed that this issue was happening because Logic/Physics continue to work "business as usual" while minimized(\*). Only Graphics was being deactivated (which caused commands to accumulate until window is restored). To continue this behavior of "business as usual", I decided that GPU work should also "continue as usual" by buffering commands in a double or triple buffer scheme until all commands are done processing (if they ever stop coming). This is specially important if the app specifically intends to keep processing while minimized. Calling `_flush_and_stall_for_all_frames()` would fix the leak, but it would make Godot's behavior different while minimized vs while the window is presenting. \* `OS::add_frame_delay` _does_ consider being minimized, but it just throttles CPU usage. Some platforms such as Android completely disable processing because the higher level code stops being called when the app goes into background. But this seems like an implementation-detail that diverges from the rest of the platforms (e.g. Windows, Linux & macOS continue to process while minimized). # Rename p_swap_buffers for p_present **This is potentially a breaking change** (if it actually breaks anything, I ignore. But I strongly suspect it doesn't break anything). "Swap Buffers" is a concept carried from OpenGL, where a frame is "done" when `glSwapBuffers()` is called, which basically means "present to the screen". However it _also_ means that OpenGL internally swaps its internal buffers in a double/triple buffer scheme (in Vulkan, we do that ourselves and is tracked by `RenderingDevice::frame`). Modern APIs like Vulkan differentiate between "submitting GPU work" and "presenting". Before this PR, calling `RendererCompositorRD::end_frame(false)` would literally do nothing. This is often undesired and the cause of the leak. After this PR, calling `RendererCompositorRD::end_frame(false)` will now process commands, swap our internal buffers in a double/triple buffer scheme **but avoid presenting to the screen**. Hence the rename of the variable from `p_swap_buffers` to `p_present` (which slightly alters its behavior). If we want `RendererCompositorRD::end_frame(false)` to do nothing, then we should not call it at all. This PR reflects such change: When we're minimized **_and_** `has_pending_resources_for_processing()` returns false, we don't call `RendererCompositorRD::end_frame()` at all. But if `has_pending_resources_for_processing()` returns true, we will call it, but with `p_present = false` because we're minimized. There's still the issue that Godot keeps processing work (logic, scripts, physics) while minimized, which we shouldn't do by default. But that's work for follow up PR. |
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| .. | ||
| effects | ||
| environment | ||
| forward_clustered | ||
| forward_mobile | ||
| shaders | ||
| spirv-reflect | ||
| storage_rd | ||
| SCsub | ||
| cluster_builder_rd.cpp | ||
| cluster_builder_rd.h | ||
| framebuffer_cache_rd.cpp | ||
| framebuffer_cache_rd.h | ||
| pipeline_cache_rd.cpp | ||
| pipeline_cache_rd.h | ||
| pipeline_hash_map_rd.h | ||
| renderer_canvas_render_rd.cpp | ||
| renderer_canvas_render_rd.h | ||
| renderer_compositor_rd.cpp | ||
| renderer_compositor_rd.h | ||
| renderer_scene_render_rd.cpp | ||
| renderer_scene_render_rd.h | ||
| shader_rd.cpp | ||
| shader_rd.h | ||
| uniform_set_cache_rd.cpp | ||
| uniform_set_cache_rd.h | ||