Fix C-style casts in GLSL pointer cast operations (#7841)

* Initial plan

* Fix C-style casts in GLSL pointer cast operations

Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/source/slang/slang-emit-glsl.cpp b/source/slang/slang-emit-glsl.cpp
index 9d4f72b07..eb71286a2 100644
--- a/source/slang/slang-emit-glsl.cpp
+++ b/source/slang/slang-emit-glsl.cpp
@@ -2727,6 +2727,23 @@ bool GLSLSourceEmitter::tryEmitInstExprImpl(IRInst* inst, const EmitOpInfo& inOu
             }
             break;
         }
+    case kIROp_CastPtrToInt:
+    case kIROp_CastIntToPtr:
+    case kIROp_PtrCast:
+        {
+            // For GLSL, emit constructor-style casts instead of C-style casts
+            auto prec = getInfo(EmitOp::Postfix);
+            EmitOpInfo outerPrec = inOuterPrec; // Make a mutable copy
+            bool needClose = maybeEmitParens(outerPrec, prec);
+
+            emitType(inst->getDataType());
+            m_writer->emit("(");
+            emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+            m_writer->emit(")");
+
+            maybeCloseParens(needClose);
+            return true;
+        }
     default:
         break;
     }