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[Feat] (MG_Impl, MG_Backend): GL_ARB_timer_query on both backends

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Implements GL timer queries end to end: a frontend query registry
(modeled on the sync module - mutex-guarded objects wrapping opaque
backend handles behind optional function pointers) serving
glGenQueries/glBeginQuery/glEndQuery(GL_TIME_ELAPSED)/glQueryCounter
(GL_TIMESTAMP)/glGetQueryObject*/glGetQueryiv with GL 3.3 error
semantics and a graceful zero-result fallback when a backend cannot
time.

DirectGLES backs spans with GL_EXT_disjoint_timer_query (context-
generation-stamped handles, bounded result waits). DirectVulkan gets a
VkTimerQueryManager: per-frame-in-flight timestamp query pools reset at
command-buffer begin (outside render passes), records harvested by
frame serial before their pool recycles, elapsed = masked tick delta x
timestampPeriod; handles are stamped with a renderer generation that
also now guards fence syncs across renderer recreation. GL_QUERY_
COUNTER_BITS reports 0 unless the live backend can actually time
(dynamic IsTimerQuerySupported hook), and a failed blocking read keeps
the handle alive so the real value stays reachable once the frame
submits.

GL_ARB_timer_query is advertised only when the device supports timing
and MOBILEGL_DISABLE_TIMERQUERY is unset - LWJGL keys Minecraft's F3
'GPU: x%' line off exactly that extension string; verified on device
(Adreno 830) on both backends.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
swung0x48
2026-07-10 01:08:38 +00:00
co-authored by Claude Fable 5
parent 7d31a6fcd7
commit 7eb3994b02
25 changed files with 1917 additions and 91 deletions
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CMakeLists.txt
+2
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@@ -222,6 +222,7 @@ set(SOURCE_FILES
MobileGL/MG_Impl/GLImpl/Exporting/Definitions.cpp
MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
MobileGL/MG_Impl/GLImpl/Sync/GL_Sync.cpp
MobileGL/MG_Impl/GLImpl/Query/GL_Query.cpp
MobileGL/MG_Impl/Init.cpp
MobileGL/MG_Impl/GetProcAddress.cpp
@@ -249,6 +250,7 @@ set(SOURCE_FILES
MobileGL/MG_Backend/DirectVulkan/Renderer/VertexInputStateFactory.cpp
MobileGL/MG_Backend/DirectVulkan/Renderer/VkBufferObject.cpp
MobileGL/MG_Backend/DirectVulkan/Renderer/VkTextureManager.cpp
MobileGL/MG_Backend/DirectVulkan/Renderer/VkTimerQueryManager.cpp
MobileGL/MG_Backend/DirectVulkan/Renderer/VkSamplerManager.cpp
MobileGL/MG_Backend/DirectVulkan/Renderer/VkClearManager.cpp
MobileGL/MG_Backend/DirectVulkan/Renderer/VkRenderPassManager.cpp