Fixed pixel alignment drawing glitches in OpenGL mode

At some window sizes, lines would flicker in between the tiles. This
happened when the window size was not dividable by the scaling factor.

Fixed by setting a slightly smaller viewport in this case (which will
hopefully not cause other issues).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/openglgraphics.cpp b/src/openglgraphics.cpp
index 65e24e51..ac412334 100644
--- a/src/openglgraphics.cpp
+++ b/src/openglgraphics.cpp
@@ -116,7 +116,7 @@ bool OpenGLGraphics::setVideoMode(int w, int h, int bpp, bool fs, bool hwaccel)
 #endif
 
     // Setup OpenGL
-    glViewport(0, 0, w, h);
+    glViewport(0, 0, mWidth * mScale, mHeight * mScale);
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
     int gotDoubleBuffer;
     SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &gotDoubleBuffer);