Commit 515802d0 authored by Ken Martin's avatar Ken Martin
Browse files

fix issue with glViewport on OSX

OSX seems to change glViewport under the hood
so we cannot cache it safely.
parent 92058e87
......@@ -146,6 +146,11 @@ void vtkOpenGLState::CheckState()
GLint iparams[4];
#if defined(__APPLE__)
// OSX systems seem to change the glViewport upon a window resize
// under the hood, so our viewport cache cannot be trusted
::glGetIntegerv(GL_VIEWPORT, iparams);
if (
iparams[0] != this->CurrentState.Viewport[0] ||
......@@ -495,7 +500,7 @@ void vtkOpenGLState::vtkglViewport(GLint x, GLint y, GLsizei width, GLsizei heig
#ifndef NO_CACHE
#if !defined(NO_CACHE) && !defined(__APPLE__)
if (this->CurrentState.Viewport[0] != x ||
this->CurrentState.Viewport[1] != y ||
this->CurrentState.Viewport[2] != width ||
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