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Allow resizable Fl_Gl_Window drawn using the Fl_OpenGL_Graphics_Driver

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12165 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Manolo Gouy 2017-01-20 17:18:38 +00:00
parent 898d2580d3
commit c8fc8cc241
1 changed files with 6 additions and 0 deletions
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6
src/Fl_Gl_Window.cxx
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@ -364,6 +364,11 @@ void Fl_Gl_Window::draw() {
glDisable(GL_DEPTH_TEST);
glPushMatrix();
glLoadIdentity();
GLint viewport[4];
glGetIntegerv (GL_VIEWPORT, viewport);
if (viewport[2] != pixel_w() || viewport[3] != pixel_h()) {
glViewport(0, 0, pixel_w(), pixel_h());
}
glOrtho(-0.5, w()-0.5, h()-0.5, -0.5, -1, 1);
// glOrtho(0, w(), h(), 0, -1, 1);
glLineWidth((GLfloat)pixels_per_unit()); // should be 1 or 2 (2 if highres OpenGL)
@ -408,6 +413,7 @@ float Fl_Gl_Window::pixels_per_unit() {
}
// creates a unique, dummy Fl_Gl_Window_Driver object used when no Fl_Gl_Window is around
// necessary to support gl_start()/gl_finish()
Fl_Gl_Window_Driver *Fl_Gl_Window_Driver::global() {
static Fl_Gl_Window_Driver *gwd = newGlWindowDriver(NULL);
return gwd;