[Feat] (ShaderTranspiler, DirectGLES): support noperspective conformantly instead of stripping it - let the qualifier reach glslang as the core SPIR-V NoPerspective decoration (native on DirectVulkan; SPIRV-Cross emits ESSL noperspective + GL_NV_shader_noperspective_interpolation on DirectGLES), and for GLES devices lacking that extension add StripNoPerspectivePass to drop the decoration and fall back to smooth; the old naked substring erase discarded the interpolation shader packs need and mangled identifiers containing the word

2026-09-12 06:08:30 +09:00 · 2026-07-20 22:59:43 -04:00
parent b6a7807a3a
commit bce9c48c8e
10 changed files with 323 additions and 9 deletions
@@ -33,6 +33,11 @@ namespace MobileGL {
                // Only for the DirectGLES transpile path.
                static bool StripUboMemberRelaxedPrecisionForEssl(const Vector<Uint32>& inputBinary,
                                                                  Vector<uint32_t>& outputBinary);
+                // Removes NoPerspective decorations so SPIRV-Cross emits plain (smooth) ESSL varyings.
+                // DirectGLES fallback only, for devices lacking GL_NV_shader_noperspective_interpolation
+                // (SPIRV-Cross would otherwise require that extension and the driver would reject it).
+                static bool StripNoPerspectiveForEssl(const Vector<Uint32>& inputBinary,
+                                                      Vector<uint32_t>& outputBinary);
                // Rebases loads of the InstanceIndex builtin to (InstanceIndex - BaseInstance) so
                // shaders see GL's zero-based gl_InstanceID. Vertex shaders only; DirectVulkan
                // backend only (glslang's relaxed mode aliases gl_InstanceID to gl_InstanceIndex,