From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 11 Dec 2021 17:34:25 +0000 (+0200)
Subject: Emit a max invocations exec mode for geometry shaders
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=0859998b4d394cb31f92c1031339bf6404561a8a

Emit a max invocations exec mode for geometry shaders
---

diff --git a/source/glsl/spirv.cpp b/source/glsl/spirv.cpp
index e1ba981b..7b3e104e 100644
--- a/source/glsl/spirv.cpp
+++ b/source/glsl/spirv.cpp
@@ -1701,7 +1701,10 @@ void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
 		writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, origin);
 	}
 	else if(stage->type==Stage::GEOMETRY)
+	{
 		use_capability(CAP_GEOMETRY);
+		writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INVOCATIONS, 1);
+	}
 
 	for(const InterfaceLayout *i: interface_layouts)
 	{
diff --git a/source/glsl/spirvconstants.h b/source/glsl/spirvconstants.h
index 9935b43e..aa164b87 100644
--- a/source/glsl/spirvconstants.h
+++ b/source/glsl/spirvconstants.h
@@ -169,6 +169,7 @@ enum SpirVCapability
 
 enum SpirVExecutionMode
 {
+	EXEC_INVOCATIONS = 0,
 	EXEC_ORIGIN_UPPER_LEFT = 7,
 	EXEC_ORIGIN_LOWER_LEFT = 8,
 	EXEC_INPUT_POINTS = 19,