From 48d275a01baaff68a0c055dd77664b5d0f22d70d Mon Sep 17 00:00:00 2001
From: Andreas Grois <andi@grois.info>
Date: Sat, 10 Mar 2018 00:14:46 +0100
Subject: Dump result to image.png in current folder.

---
 BuddhaTest/src/BuddhaTest.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'BuddhaTest/src/BuddhaTest.cpp')

diff --git a/BuddhaTest/src/BuddhaTest.cpp b/BuddhaTest/src/BuddhaTest.cpp
index 57edc14..d1b6a66 100644
--- a/BuddhaTest/src/BuddhaTest.cpp
+++ b/BuddhaTest/src/BuddhaTest.cpp
@@ -14,8 +14,8 @@ int main()
     unsigned int bufferWidth = 1600;
     unsigned int bufferHeight = 900;
 
-    unsigned int orbitLengthRed = 100;
-    unsigned int orbitLengthGreen = 10;
+    unsigned int orbitLengthRed = 10;
+    unsigned int orbitLengthGreen = 100;
     unsigned int orbitLengthBlue = 1000;
 
 	GLFWwindow* window;
@@ -124,6 +124,15 @@ int main()
 		glfwPollEvents();
 	}
 
+    glMemoryBarrier(GL_ALL_BARRIER_BITS);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, drawBuffer);
+    {
+        const unsigned int pixelCount{(bufferWidth * bufferHeight)*3}; //*3 -> RGB
+        std::vector<uint32_t> readBackBuffer(pixelCount);
+        glGetBufferSubData(GL_SHADER_STORAGE_BUFFER,4*2,4 * pixelCount,readBackBuffer.data()); //offset of 2*4, that's the dimension integers.
+        Helpers::WriteOutputPNG(readBackBuffer,bufferWidth,bufferHeight);
+    }
+
 	glfwTerminate();
 	return 0;
 }
-- 
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