commit 506256cdb5e48435570bbcae81eb8d17de1f7b9f
author Dirk Lemstra <dirk@git.imagemagick.org> Tue Apr 17 21:09:12 2018 +0200
committer Dirk Lemstra <dirk@git.imagemagick.org> Tue Apr 17 21:09:29 2018 +0200
tree 2f4d496b2e620f54691c688145a4f4456e8f7e1c
parent 3065875a976e3df51546d65591c24b65d224cd03

OpenCL is disabled by default for NVIDIA devices due to a lot of reports about access violations.

MagickCore/opencl.c

diff --git a/MagickCore/opencl.c b/MagickCore/opencl.c
index 1e61864..c4cead5 100644
--- a/MagickCore/opencl.c
+++ b/MagickCore/opencl.c
@@ -2394,6 +2394,9 @@
 MagickPrivate MagickBooleanType InitializeOpenCL(MagickCLEnv clEnv,
   ExceptionInfo *exception)
 {
+  register
+    size_t i;
+
   LockSemaphoreInfo(clEnv->lock);
   if (clEnv->initialized != MagickFalse)
     {
@@ -2408,6 +2411,12 @@
         AutoSelectOpenCLDevices(clEnv);
     }
   clEnv->initialized=MagickTrue;
+  /* NVIDIA is disabled by default due to reported access violation */
+  for (i=0; i < (ssize_t) clEnv->number_devices; i++)
+  {
+    if (strncmp(clEnv->devices[i]->platform_name,"NVIDIA",6) == 0)
+        clEnv->enabled=MagickFalse;
+  }
   UnlockSemaphoreInfo(clEnv->lock);
   return(HasOpenCLDevices(clEnv,exception));
 }