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SDL: Restore OpenGL's previous state after displaying the overlay

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This commit is contained in:
Bastien Bouclet 2011-09-17 10:28:32 +02:00
parent 243081610a
commit 6284ccbc3d
1 changed files with 20 additions and 5 deletions
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25
backends/graphics/surfacesdl/surfacesdl-graphics.cpp
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@ -265,14 +265,23 @@ void SurfaceSdlGraphicsManager::updateScreen() {
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
}
// Save current state
glPushAttrib(GL_TRANSFORM_BIT | GL_ENABLE_BIT | GL_DEPTH_BUFFER_BIT | GL_SCISSOR_BIT);
// prepare view
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, _overlayWidth, _overlayHeight, 0, 0, 1);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_TEXTURE);
glPushMatrix();
glLoadIdentity();
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
@ -299,11 +308,17 @@ void SurfaceSdlGraphicsManager::updateScreen() {
}
}
glDisable(GL_SCISSOR_TEST);
glDisable(GL_TEXTURE_2D);
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
// Restore previous state
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_TEXTURE);
glPopMatrix();
glPopAttrib();
}
SDL_GL_SwapBuffers();
} else