OpenGL tiled image fix.

modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp

@@ -515,7 +515,7 @@ public:
                                         JUCE_DECLARE_MATRIX_UNIFORM JUCE_DECLARE_VARYING_COLOUR JUCE_DECLARE_VARYING_PIXELPOS
     #define JUCE_GET_IMAGE_PIXEL        "texture2D (imageTexture, vec2 (texturePos.x, 1.0 - texturePos.y))"
     #define JUCE_CLAMP_TEXTURE_COORD    JUCE_HIGHP " vec2 texturePos = clamp (" JUCE_MATRIX_TIMES_FRAGCOORD ", imageLimits.xy, imageLimits.zw);"
-    #define JUCE_MOD_TEXTURE_COORD      JUCE_HIGHP " vec2 texturePos = imageLimits.xy + mod (" JUCE_MATRIX_TIMES_FRAGCOORD " - imageLimits.xy, imageLimits.zw - imageLimits.xy);"
+    #define JUCE_MOD_TEXTURE_COORD      JUCE_HIGHP " vec2 texturePos = clamp (mod (" JUCE_MATRIX_TIMES_FRAGCOORD ", imageLimits.zw + imageLimits.xy), imageLimits.xy, imageLimits.zw);"
 
     struct ImageProgram  : public ShaderBase
     {