From 43de4a59f34b6668c3fb557ad5c5d756373c7963 Mon Sep 17 00:00:00 2001
From: milek7 <me@milek7.pl>
Date: Thu, 25 Oct 2018 19:00:44 +0200
Subject: [PATCH] gles doesn't support glGetTexLevelParameter (though it anyway
 doesn't work on ANGLE)

---
 texturewindow.cpp | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/texturewindow.cpp b/texturewindow.cpp
index cbf9a9b0..ee33bda5 100644
--- a/texturewindow.cpp
+++ b/texturewindow.cpp
@@ -53,16 +53,20 @@ void texture_window::threadfunc()
 
 	while (!m_exit)
 	{
-		int w, h;
-		glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w);
-		glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h);
-		if (m_tex_w != w || m_tex_h != h)
+		// if texture resized, update window size (maybe not necessary?)
+		if (GLAD_GL_VERSION_3_3 || GLAD_GL_ES_VERSION_3_1)
 		{
-			m_tex_w = w;
-			m_tex_h = h;
-			m_win_w = w;
-			m_win_h = h;
-			glfwSetWindowSize(m_window, w, h); // eh, not thread-safe (but works?)
+			int w, h;
+			glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w);
+			glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h);
+			if (m_tex_w != w || m_tex_h != h)
+			{
+				m_tex_w = w;
+				m_tex_h = h;
+				m_win_w = w;
+				m_win_h = h;
+				glfwSetWindowSize(m_window, w, h); // eh, not thread-safe (but works?)
+			}
 		}
 
 		glViewport(0, 0, m_win_w, m_win_h);