swung0x48/MobileGL
1
0
Fork 0
mirror of https://github.com/MobileGL-Dev/MobileGL synced 2026-09-07 19:58:32 +09:00
Code Issues Packages Projects Releases Wiki Activity

[Feat] (Loader): detect GL_OES_viewport_array in the GLES capability scan

Browse Source
This commit is contained in:
swung0x48
2026-08-20 05:29:12 -04:00
parent 15e36ad1e9
commit f2f6430e34
2 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
+5
View File
@@ -932,6 +932,9 @@ namespace MobileGL::MG_Util::BackendLoader {
if (std::strcmp(extension, "GL_EXT_clip_cull_distance") == 0) {
caps.SupportsClipDistance = true;
}
if (std::strcmp(extension, "GL_OES_viewport_array") == 0) {
caps.SupportsViewportArray = true;
}
}
}
// The pointer check on top of the extension check makes each flag sufficient on its own
@@ -989,6 +992,8 @@ namespace MobileGL::MG_Util::BackendLoader {
MGLOG_I(" base instance (EXT_base_instance; emulated by attribute offsets when absent): %s",
caps.SupportsBaseInstance ? "yes" : "no");
MGLOG_I(" clip distances (EXT_clip_cull_distance): %s", caps.SupportsClipDistance ? "yes" : "no");
MGLOG_I(" viewport array (OES_viewport_array; gl_ViewportIndex collapses to viewport 0 when absent): %s",
caps.SupportsViewportArray ? "yes" : "no");
// LOAD-BEARING STRING, not just a banner. android-plugin/trace-replay-ci.sh's
// is_angle_surface_lost() greps mobilegl.log for exactly "OpenGL ES capabilities:" to
MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.h
+15
View File
@@ -1182,6 +1182,21 @@ namespace MobileGL {
// compile and the per-distance enables have nowhere to go - clipping silently never
// happens, which is exactly what KHR-GLxx.clip_distance.functional catches.
Bool SupportsClipDistance = false;
// GL_OES_viewport_array is present: the driver knows gl_ViewportIndex in ESSL - and
// only then. ESSL has no core spelling for it at ANY version, while SPIRV-Cross prints
// the identifier bare and requests nothing for it (contrast gl_Layer, which it backs
// with GL_NV_viewport_array2 on ES), so the `#extension GL_OES_viewport_array :
// require` line has to be inserted into the emitted source - see
// RequestViewportArrayExtension. Without the extension the stage does not compile at
// all and the whole program becomes unusable, which on DirectGLES means every draw
// using it silently renders nothing; LowerViewportIndexPass is the fallback that
// demotes the builtin so the program still links and degrades to viewport 0.
//
// Extension string only, deliberately: DirectGLES does not call any of the indexed
// OES entry points yet, so there is no pointer to require. When that forwarding lands
// this must gain the pointer check as well - the rule everywhere else in this struct,
// because eglGetProcAddress can hand back a stub that silently drops every call.
Bool SupportsViewportArray = false;
// GL_RENDERER contains "ANGLE".
Bool IsAngleRenderer = false;
// GL_RENDERER contains both "ANGLE" and "llvmpipe".