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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_Impl/GLImpl/RenderState/GL_RenderState.cpp
+9
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@@ -561,6 +561,11 @@ namespace MobileGL::MG_Impl::GLImpl {
buf, BoolVec4(red != GL_FALSE, green != GL_FALSE, blue != GL_FALSE, alpha != GL_FALSE));
}
void PrimitiveRestartIndex_State(GLuint index) {
// glPrimitiveRestartIndex accepts any GLuint and generates no error.
MG_State::pGLContext->SetPrimitiveRestartIndex(index);
}
void ClampColor_State(GLenum target, GLenum clamp) {
// GL 3.3 core: the only legal target is GL_CLAMP_READ_COLOR. The compatibility-only
// GL_CLAMP_VERTEX_COLOR / GL_CLAMP_FRAGMENT_COLOR were removed from the core profile and
@@ -924,6 +929,10 @@ namespace MobileGL::MG_Impl::GLImpl {
ClampColor_State(target, clamp);
}
void PrimitiveRestartIndex(GLuint index) {
PrimitiveRestartIndex_State(index);
}
void BlendFuncSeparate(GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha) {
BlendFuncSeparate_State(sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha);
}