From 3b734f0d6b9e28c1f2c4ae54e3f46e573e02f4a5 Mon Sep 17 00:00:00 2001
From: Andreas Grois <andi@grois.info>
Date: Fri, 9 Mar 2018 21:36:10 +0100
Subject: Initial Commit

---
 BuddhaTest/Shaders/BuddhaCompute.glsl  | 27 +++++++++++++++++++++++++++
 BuddhaTest/Shaders/BuddhaFragment.glsl | 28 ++++++++++++++++++++++++++++
 BuddhaTest/Shaders/BuddhaVertex.glsl   | 11 +++++++++++
 3 files changed, 66 insertions(+)
 create mode 100644 BuddhaTest/Shaders/BuddhaCompute.glsl
 create mode 100644 BuddhaTest/Shaders/BuddhaFragment.glsl
 create mode 100644 BuddhaTest/Shaders/BuddhaVertex.glsl

(limited to 'BuddhaTest/Shaders')

diff --git a/BuddhaTest/Shaders/BuddhaCompute.glsl b/BuddhaTest/Shaders/BuddhaCompute.glsl
new file mode 100644
index 0000000..49209ae
--- /dev/null
+++ b/BuddhaTest/Shaders/BuddhaCompute.glsl
@@ -0,0 +1,27 @@
+#version 430
+
+layout(std430, binding=2) buffer renderedData
+{
+        uint width;
+        uint height;
+        uint counts_SSBO[];
+};
+
+uniform uint iterationCount;
+
+void addToColorAt(uvec2 cell, uvec3 toAdd)
+{
+    uint firstIndex = 3*(cell.x + cell.y * width);
+    atomicAdd(counts_SSBO[firstIndex],toAdd.x);
+    atomicAdd(counts_SSBO[firstIndex+1],toAdd.y);
+    atomicAdd(counts_SSBO[firstIndex+2],toAdd.z);
+}
+
+
+layout (local_size_x = 1, local_size_y = 1) in;
+void main() {
+    if(iterationCount < 1024)
+        addToColorAt(uvec2(iterationCount%width,iterationCount/width),uvec3(1,0,0));
+    else
+        addToColorAt(uvec2(iterationCount%width,iterationCount/width),uvec3(0,1,0));
+}
diff --git a/BuddhaTest/Shaders/BuddhaFragment.glsl b/BuddhaTest/Shaders/BuddhaFragment.glsl
new file mode 100644
index 0000000..4978765
--- /dev/null
+++ b/BuddhaTest/Shaders/BuddhaFragment.glsl
@@ -0,0 +1,28 @@
+#version 430 core
+
+in vec2 uv;
+
+out vec3 color;
+
+layout(std430, binding=2) buffer renderedData
+{
+        uint width;
+        uint height;
+        uint counts_SSBO[];
+};
+
+uvec3 getColorAt(vec2 fragCoord)
+{
+    uint xIndex = uint(max(0.0,(fragCoord.x+1.0)*0.5*width));
+    uint yIndex = uint(max(0.0,(fragCoord.y+1.0)*0.5*height));
+    uint firstIndex = 3*(xIndex + yIndex * width);
+    return uvec3(counts_SSBO[firstIndex],counts_SSBO[firstIndex+1],counts_SSBO[firstIndex+2]);
+}
+
+void main(){
+    uvec3 totalCount = getColorAt(uv) + getColorAt(vec2(uv.x, -uv.y));
+    uvec3 brightness = getColorAt(vec2(-0.2390625,0));
+
+    vec3 scaled = vec3(totalCount)/max(length(vec3(brightness)),1.0);
+    color = scaled;
+}
diff --git a/BuddhaTest/Shaders/BuddhaVertex.glsl b/BuddhaTest/Shaders/BuddhaVertex.glsl
new file mode 100644
index 0000000..686eeb4
--- /dev/null
+++ b/BuddhaTest/Shaders/BuddhaVertex.glsl
@@ -0,0 +1,11 @@
+#version 430 core
+
+layout(location = 0) in vec3 vertexPosition_modelspace;
+
+out vec2 uv;
+
+void main(){
+  gl_Position.xyz = vertexPosition_modelspace;
+  gl_Position.w = 1.0;
+  uv = gl_Position.xy;
+}
\ No newline at end of file
-- 
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