From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 10 Oct 2021 12:50:43 +0000 (+0300)
Subject: Move the frag_color output from msp_interface to common
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=b4fe073653da9e27bf486b1b4366fe44b6138bb4

Move the frag_color output from msp_interface to common

This allows creating shaders without a fragment stage which use the
interface.
---

diff --git a/builtin_data/_occluder.glsl b/builtin_data/_occluder.glsl
index 488d4120..b8846c47 100644
--- a/builtin_data/_occluder.glsl
+++ b/builtin_data/_occluder.glsl
@@ -4,8 +4,3 @@ void main()
 {
 	gl_Position = clip_eye_matrix*eye_world_matrix*world_obj_matrix*vertex;
 }
-#pragma MSP stage(fragment)
-void main()
-{
-	frag_color = vec4(1.0);
-}
diff --git a/builtin_data/_sky_backdrop.glsl b/builtin_data/_sky_backdrop.glsl
index fa28663c..fa8f1be5 100644
--- a/builtin_data/_sky_backdrop.glsl
+++ b/builtin_data/_sky_backdrop.glsl
@@ -13,6 +13,7 @@ void main()
 }
 
 #pragma MSP stage(fragment)
+layout(location=0) out vec4 frag_color;
 void main()
 {
 	vec3 nview = normalize(view_dir.xyz);
diff --git a/shaderlib/common.glsl b/shaderlib/common.glsl
index 33fefe88..03cfd5af 100644
--- a/shaderlib/common.glsl
+++ b/shaderlib/common.glsl
@@ -77,6 +77,8 @@ struct IncomingLight
 	vec3 color;
 };
 
+layout(location=0) out vec4 frag_color;
+
 virtual vec3 get_fragment_normal()
 {
 	if(use_normal_map)
diff --git a/shaderlib/msp_interface.glsl b/shaderlib/msp_interface.glsl
index b0f8a410..3fdd606b 100644
--- a/shaderlib/msp_interface.glsl
+++ b/shaderlib/msp_interface.glsl
@@ -49,6 +49,3 @@ layout(location=7) in vec4 texcoord1;
 layout(location=8) in vec4 texcoord2;
 layout(location=9) in vec4 texcoord3;
 layout(location=13) in vec4 instance_transform[3];
-
-#pragma MSP stage(fragment)
-layout(location=0) out vec4 frag_color;