From dbaff017ebe9d429c4399609ece5198d8db1ae42 Mon Sep 17 00:00:00 2001
From: kallaballa <amir@viel-zu.org>
Date: Wed, 9 Nov 2022 01:54:26 +0100
Subject: [PATCH] downgrade required opencl to 1.2

---
 src/nanovg/nanovg-demo.cpp         |  2 +-
 src/optflow/optflow-demo.cpp       | 12 +++++-------
 src/optflow_mt/optflow_mt-demo.cpp |  2 +-
 src/tetra/tetra-demo.cpp           |  2 +-
 src/video/video-demo.cpp           |  2 +-
 5 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/src/nanovg/nanovg-demo.cpp b/src/nanovg/nanovg-demo.cpp
index b3157a050..910bd5f5e 100644
--- a/src/nanovg/nanovg-demo.cpp
+++ b/src/nanovg/nanovg-demo.cpp
@@ -1,4 +1,4 @@
-#define CL_TARGET_OPENCL_VERSION 200
+#define CL_TARGET_OPENCL_VERSION 120
 
 constexpr unsigned long WIDTH = 1920;
 constexpr unsigned long HEIGHT = 1080;
diff --git a/src/optflow/optflow-demo.cpp b/src/optflow/optflow-demo.cpp
index e2fc6217b..a36915f30 100644
--- a/src/optflow/optflow-demo.cpp
+++ b/src/optflow/optflow-demo.cpp
@@ -1,4 +1,4 @@
-#define CL_TARGET_OPENCL_VERSION 200
+#define CL_TARGET_OPENCL_VERSION 120
 
 constexpr unsigned long WIDTH = 1920;
 constexpr unsigned long HEIGHT = 1080;
@@ -59,7 +59,7 @@ int main(int argc, char **argv) {
     cv::UMat frameBuffer;
     cv::UMat background;
     cv::UMat foreground(HEIGHT, WIDTH, CV_8UC4, cv::Scalar::all(0));
-    cv::UMat videoFrame, flipped, nextVideoFrameGray, prevVideoFrameGray, foregroundMaskGrey;
+    cv::UMat videoFrame, nextVideoFrameGray, prevVideoFrameGray, foregroundMaskGrey;
 
     cv::Ptr<cv::BackgroundSubtractor> bgSubtractor = cv::createBackgroundSubtractorMOG2(100, 32.0, false);
 
@@ -78,14 +78,9 @@ int main(int argc, char **argv) {
         if (videoFrame.empty())
             break;
 
-        gl::bind();
-        gl::acquire_from_gl(frameBuffer);
-
         cv::resize(videoFrame, videoFrame, cv::Size(WIDTH, HEIGHT));
         cv::cvtColor(videoFrame, background, cv::COLOR_RGB2BGRA);
         cvtColor(videoFrame, nextVideoFrameGray, cv::COLOR_RGB2GRAY);
-        frameBuffer = cv::Scalar::all(0);
-        gl::release_to_gl(frameBuffer);
 
         bgSubtractor->apply(videoFrame, foregroundMaskGrey);
 
@@ -102,6 +97,8 @@ int main(int argc, char **argv) {
             }
         }
 
+        gl::bind();
+
         if (allPoints.size() > 4) {
             prevPoints = allPoints;
             if (prevVideoFrameGray.empty()) {
@@ -114,6 +111,7 @@ int main(int argc, char **argv) {
             cv::calcOpticalFlowPyrLK(prevVideoFrameGray, nextVideoFrameGray, prevPoints, nextPoints, status, err, cv::Size(15, 15), 2, criteria);
 
             nvg::begin();
+            nvg::clear();
             newPoints.clear();
 
             using kb::nvg::vg;
diff --git a/src/optflow_mt/optflow_mt-demo.cpp b/src/optflow_mt/optflow_mt-demo.cpp
index daac034d2..fefe6f4b2 100644
--- a/src/optflow_mt/optflow_mt-demo.cpp
+++ b/src/optflow_mt/optflow_mt-demo.cpp
@@ -1,4 +1,4 @@
-#define CL_TARGET_OPENCL_VERSION 200
+#define CL_TARGET_OPENCL_VERSION 120
 
 constexpr unsigned long WIDTH = 1920;
 constexpr unsigned long HEIGHT = 1080;
diff --git a/src/tetra/tetra-demo.cpp b/src/tetra/tetra-demo.cpp
index 762275c67..ad6aed5df 100644
--- a/src/tetra/tetra-demo.cpp
+++ b/src/tetra/tetra-demo.cpp
@@ -1,4 +1,4 @@
-#define CL_TARGET_OPENCL_VERSION 200
+#define CL_TARGET_OPENCL_VERSION 120
 
 constexpr long unsigned int WIDTH = 1920;
 constexpr long unsigned int HEIGHT = 1080;
diff --git a/src/video/video-demo.cpp b/src/video/video-demo.cpp
index 9dc98eb02..8928025e8 100644
--- a/src/video/video-demo.cpp
+++ b/src/video/video-demo.cpp
@@ -1,4 +1,4 @@
-#define CL_TARGET_OPENCL_VERSION 200
+#define CL_TARGET_OPENCL_VERSION 120
 
 //WIDTH and HEIGHT have to be specified before including subsystems.hpp
 constexpr long unsigned int WIDTH = 1920;