diff options
| -rw-r--r-- | src/Fl_Gl_Window.cxx | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/Fl_Gl_Window.cxx b/src/Fl_Gl_Window.cxx index 9f4648910..ab3b0d4c1 100644 --- a/src/Fl_Gl_Window.cxx +++ b/src/Fl_Gl_Window.cxx @@ -1,5 +1,5 @@ // -// "$Id: Fl_Gl_Window.cxx,v 1.12.2.5 1999/12/19 05:32:34 bill Exp $" +// "$Id: Fl_Gl_Window.cxx,v 1.12.2.6 2000/01/12 06:06:24 bill Exp $" // // OpenGL window code for the Fast Light Tool Kit (FLTK). // @@ -199,8 +199,10 @@ void Fl_Gl_Window::flush() { if (overlay == this) { // Use CopyPixels to act like SWAP_TYPE == COPY + uchar save_valid = valid_; // don't draw if only the overlay is damaged: if (damage1_ || damage() != FL_DAMAGE_OVERLAY || !valid()) draw(); + // we use a seperate context for the copy because rasterpos must be 0 // and depth test needs to be off: static GLXContext ortho_context; @@ -212,10 +214,14 @@ void Fl_Gl_Window::flush() { ortho_context = glXCreateContext(fl_display,g->vis,fl_first_context,1); #endif fl_set_gl_context(this, ortho_context); - if (init) { + if (init || !save_valid) { glDisable(GL_DEPTH_TEST); glReadBuffer(GL_BACK); glDrawBuffer(GL_FRONT); + glLoadIdentity(); + glViewport(0, 0, w(), h()); + glOrtho(0, w(), 0, h(), -1, 1); + glRasterPos2i(0,0); } glCopyPixels(0,0,w(),h(),GL_COLOR); make_current(); // set current context back to draw overlay @@ -316,5 +322,5 @@ void Fl_Gl_Window::draw_overlay() {} #endif // -// End of "$Id: Fl_Gl_Window.cxx,v 1.12.2.5 1999/12/19 05:32:34 bill Exp $". +// End of "$Id: Fl_Gl_Window.cxx,v 1.12.2.6 2000/01/12 06:06:24 bill Exp $". // |