From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 24 Apr 2021 11:31:11 +0000 (+0300)
Subject: Rearrange postprocessing shaders
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=d4312ccb1a73acecc57394b2c5230083b1f8b6a1

Rearrange postprocessing shaders

Postprocess.glsl has been renamed to flat_effect.glsl and made more
generic so it can be used in non-postprocessing effects too.
---

diff --git a/builtin_data/_ambientocclusion.glsl b/builtin_data/_ambientocclusion.glsl
index 89d13357..dca636bb 100644
--- a/builtin_data/_ambientocclusion.glsl
+++ b/builtin_data/_ambientocclusion.glsl
@@ -2,6 +2,7 @@ const int max_samples = 32;
 
 uniform mat4 projection_matrix;
 
+uniform sampler2D source;
 uniform sampler2D depth;
 uniform sampler2D occlusion;
 uniform sampler2D rotate;
diff --git a/builtin_data/_ambientocclusion_combine.glsl b/builtin_data/_ambientocclusion_combine.glsl
index 616bada9..88929066 100644
--- a/builtin_data/_ambientocclusion_combine.glsl
+++ b/builtin_data/_ambientocclusion_combine.glsl
@@ -1,7 +1,8 @@
-import postprocess;
+import flat_effect;
 import _ambientocclusion;
 
 #pragma MSP stage(fragment)
+layout(location=0) out vec4 frag_color;
 void main()
 {
 	vec3 center = unproject(vec3(vertex.xy, texture(depth, texcoord).r));
diff --git a/builtin_data/_ambientocclusion_occlude.glsl b/builtin_data/_ambientocclusion_occlude.glsl
index e1900323..260f1efa 100644
--- a/builtin_data/_ambientocclusion_occlude.glsl
+++ b/builtin_data/_ambientocclusion_occlude.glsl
@@ -1,7 +1,8 @@
-import postprocess;
+import flat_effect;
 import _ambientocclusion;
 
 #pragma MSP stage(fragment)
+layout(location=0) out float frag_out;
 void main()
 {
 	vec4 rv = texture(rotate, gl_FragCoord.xy/4.0)*2.0-1.0;
@@ -21,5 +22,5 @@ void main()
 			count += 1.0;
 		}
 	}
-	frag_color = vec4(1.0-occlusion_sum/count, 0.0, 0.0, 1.0);
+	frag_out = 1.0-occlusion_sum/count;
 }
diff --git a/builtin_data/_bloom.glsl b/builtin_data/_bloom.glsl
index 262cb29b..fe3dd6e4 100644
--- a/builtin_data/_bloom.glsl
+++ b/builtin_data/_bloom.glsl
@@ -1,3 +1,4 @@
+uniform sampler2D source;
 uniform sampler2D blurred;
 uniform vec2 delta;
 uniform BloomParams
diff --git a/builtin_data/_bloom_blur.glsl b/builtin_data/_bloom_blur.glsl
index ce1cf755..0207506d 100644
--- a/builtin_data/_bloom_blur.glsl
+++ b/builtin_data/_bloom_blur.glsl
@@ -1,10 +1,11 @@
-import postprocess;
+import flat_effect;
 import _bloom;
 
 #pragma MSP stage(fragment)
+layout(location=0) out vec4 frag_color;
 void main()
 {
-	frag_color = vec4(0.0, 0.0, 0.0, 0.0);
+	frag_color = vec4(0.0);
 	for(int i=0; i<=size*2; ++i)
 		frag_color += texture(source, texcoord+delta*float(i-size))*factors[i];
 }
diff --git a/builtin_data/_bloom_combine.glsl b/builtin_data/_bloom_combine.glsl
index 641459be..be561af1 100644
--- a/builtin_data/_bloom_combine.glsl
+++ b/builtin_data/_bloom_combine.glsl
@@ -1,7 +1,8 @@
-import postprocess;
+import flat_effect;
 import _bloom;
 
 #pragma MSP stage(fragment)
+layout(location=0) out vec4 frag_color;
 void main()
 {
 	frag_color = mix(texture(source, texcoord), texture(blurred, texcoord), strength);
diff --git a/builtin_data/_colorcurve.glsl b/builtin_data/_colorcurve.glsl
index 23b5577d..9b6ae362 100644
--- a/builtin_data/_colorcurve.glsl
+++ b/builtin_data/_colorcurve.glsl
@@ -1,13 +1,16 @@
-import postprocess;
+import flat_effect;
 
-uniform sampler1D curve;
 uniform ToneMapping
 {
 	float exposure;
 	vec3 brightness_response;
 };
 
+uniform sampler2D source;
+uniform sampler1D curve;
+
 #pragma MSP stage(fragment)
+layout(location=0) out vec4 frag_color;
 void main()
 {
 	vec4 incoming = texture(source, texcoord);
diff --git a/shaderlib/flat_effect.glsl b/shaderlib/flat_effect.glsl
new file mode 100644
index 00000000..0377b8a6
--- /dev/null
+++ b/shaderlib/flat_effect.glsl
@@ -0,0 +1,8 @@
+#pragma MSP stage(vertex)
+layout(location=0) in vec4 vertex;
+void main()
+{
+	gl_Position = vertex;
+	out vec2 texcoord = vertex.xy*0.5+0.5;
+	passthrough;
+}
diff --git a/shaderlib/postprocess.glsl b/shaderlib/postprocess.glsl
deleted file mode 100644
index c868bd11..00000000
--- a/shaderlib/postprocess.glsl
+++ /dev/null
@@ -1,13 +0,0 @@
-uniform sampler2D source;
-
-#pragma MSP stage(vertex)
-layout(location=0) in vec4 vertex;
-void main()
-{
-	gl_Position = vertex;
-	out vec2 texcoord = vertex.xy*0.5+0.5;
-	passthrough;
-}
-
-#pragma MSP stage(fragment)
-layout(location=0) out vec4 frag_color;