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[Feat] (MG_Impl/GLImpl, MG_State): implement glPrimitiveRestartIndex

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Store the primitive restart index as render state and report it through
glGetIntegerv(GL_PRIMITIVE_RESTART_INDEX), replacing the stub and the
hardcoded 0 in the getter.

- RenderState gains a PrimitiveRestartIndex field (default 0) with
  set/get accessors and GLContext wrappers.
- glPrimitiveRestartIndex accepts any GLuint and generates no error.
- glGetIntegerv(GL_PRIMITIVE_RESTART_INDEX) now reads the stored value.

This is the state layer only. The backends do not yet honor an arbitrary
restart index at draw time -- Vulkan and GLES support only the fixed
all-ones restart value (GL_PRIMITIVE_RESTART_FIXED_INDEX) -- so a non-
default index is tracked and queryable but not yet applied to indexed
draws.

Tests: RenderStateSanity round-trip (default 0, mid value, and the full
32-bit range). Full SanityTest sweep green (31/31).
This commit is contained in:
swung0x48
2026-07-11 00:43:45 -04:00
parent 22ac8a8c10
commit e18d369adf
9 changed files with 63 additions and 2 deletions
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MobileGL/MG_State/GLState/Core.h
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@@ -136,6 +136,8 @@ namespace MobileGL {
void SetPolygonMode(GLenum front, GLenum back);
GLenum GetPolygonModeFront() const;
GLenum GetPolygonModeBack() const;
void SetPrimitiveRestartIndex(Uint32 index);
Uint32 GetPrimitiveRestartIndex() const;
void SetCapability(CapabilityInput cap, Bool enabled);
Bool IsCapabilityEnabled(CapabilityInput cap) const;
void SetCapabilityIndexed(CapabilityInput cap, Uint index, Bool enabled);