From b24aab30527feb67f32e0f7a43dc8be4eb0fc0da Mon Sep 17 00:00:00 2001
From: Jordi Vilalta Prat
Date: Sat, 8 Jan 2011 16:05:27 +0000
Subject: OPENGL: Skip empty texture updates.

This fixes some hangs when calling the GMM while running Fascination.

svn-id: r55166
---
 backends/graphics/opengl/gltexture.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'backends')

diff --git a/backends/graphics/opengl/gltexture.cpp b/backends/graphics/opengl/gltexture.cpp
index 843ec2d2b3..cd9e23cb71 100644
--- a/backends/graphics/opengl/gltexture.cpp
+++ b/backends/graphics/opengl/gltexture.cpp
@@ -141,6 +141,10 @@ void GLTexture::allocBuffer(GLuint w, GLuint h) {
 }
 
 void GLTexture::updateBuffer(const void *buf, int pitch, GLuint x, GLuint y, GLuint w, GLuint h) {
+	// Skip empty updates.
+	if (w * h == 0)
+		return;
+
 	// Select this OpenGL texture
 	glBindTexture(GL_TEXTURE_2D, _textureName); CHECK_GL_ERROR();
 
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