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[Fix] (DirectGLES): gate the mg_IndirectParams vertex-stage injection on the driver having a vertex storage block

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swung0x48
2026-08-20 13:16:29 -04:00
parent a991f63899
commit 8899f065f4
2 changed files with 60 additions and 0 deletions
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MobileGL/MG_Backend/DirectGLES/Managers.h
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@@ -21,6 +21,16 @@ namespace MobileGL::MG_Backend::DirectGLES {
String EmulateBaseInstanceInVertexShader(String source, GLenum shaderType);
String PromoteDrawParameterGlobalsToUniforms(String source, GLenum shaderType);
// Whether a vertex shader may declare a storage block at all, given what the host driver
// reports for GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS. Pure, and separated from the capability
// global purely so the decision can be tested without one.
//
// The indirect half of the gl_BaseInstance lowering in PromoteDrawParameterGlobalsToUniforms
// is the only thing that needs this, and it needs exactly one block. A driver reporting 0 is
// conformant - the minimum is 0 in GL 4.6 table 23.64 and ES 3.2 table 21.44 - and ARM's
// GLES driver does report 0, so this is a live path, not a defensive one.
Bool VertexStageStorageBlockUsable(Int maxVertexShaderStorageBlocks);
// True once the process has entered exit(): past that point the EGL library and
// the driver may already be unloaded, so a backend twin's destructor must not
// call into g_GLESFuncs (the observed crash is a jump through an unmapped driver