Fix http://otland.net/f494/otclient-error-171679/

src/framework/graphics/graphics.cpp

@@ -365,3 +365,16 @@ bool Graphics::canCacheBackbuffer()
     return m_cacheBackbuffer;
 #endif
 }
+
+bool Graphics::hasScissorBug()
+{
+#if OPENGL_ES==2
+    return false;
+#elif OPENGL_ES==1
+    return false;
+#else
+    if(!GLEW_VERSION_1_2)
+        return true;
+    return false;
+#endif
+}

src/framework/graphics/graphics.h

@@ -71,6 +71,7 @@ public:
     bool canUseClampToEdge();
     bool canUseBlendFuncSeparate();
     bool canCacheBackbuffer();
+    bool hasScissorBug();
 
 private:
     Size m_viewportSize;

src/framework/graphics/painter.cpp

@@ -222,6 +222,7 @@ void Painter::updateGlClipRect()
         glEnable(GL_SCISSOR_TEST);
         glScissor(m_clipRect.left(), m_resolution.height() - m_clipRect.bottom() - 1, m_clipRect.width(), m_clipRect.height());
     } else {
+        glScissor(0, 0, m_resolution.width(), m_resolution.height());
         glDisable(GL_SCISSOR_TEST);
     }
 }

src/framework/graphics/painterogl1.cpp

@@ -76,6 +76,10 @@ void PainterOGL1::drawCoords(CoordsBuffer& coordsBuffer, DrawMode drawMode)
         updateGlTextureState();
     }
 
+    // GDI Generic driver has this bug
+    if(g_graphics.hasScissorBug())
+        updateGlClipRect();
+
     // use vertex arrays if possible, much faster
     if(g_graphics.canUseDrawArrays()) {
         // update coords buffer hardware caches if enabled