Fix post processing framebuffer binding

The framebuffer stack operations were at the wrong locations which
caused problems since the wrong buffers were used for rendering.

Author: asarium

code/graphics/opengl/gropenglpostprocessing.cpp

@@ -103,8 +103,6 @@ void opengl_post_pass_bloom()
 	// we need the scissor test disabled
 	GLboolean scissor_test = GL_state.ScissorTest(GL_FALSE);
 
-	GL_state.PushFramebufferState();
-
 	// ------  begin bright pass ------
 	int width, height;
 	{
@@ -379,15 +377,15 @@ void gr_opengl_post_process_end()
 	GLboolean cull = GL_state.CullFace(GL_FALSE);
 
 	GL_state.Texture.SetShaderMode(GL_TRUE);
+
+	GL_state.PushFramebufferState();
 
 	// do bloom, hopefully ;)
 	opengl_post_pass_bloom();
 
 	// do tone mapping
 	opengl_post_pass_tonemap();
 
-	GL_state.PopFramebufferState();
-
     // Do FXAA
     if (Cmdline_fxaa && !fxaa_unavailable && !GL_rendering_to_texture) {
         opengl_post_pass_fxaa();
@@ -437,7 +435,7 @@ void gr_opengl_post_process_end()
 	}
 
 	// now render it to the screen ...
-	GL_state.BindFrameBuffer(0);
+	GL_state.PopFramebufferState();
 	GL_state.Texture.SetActiveUnit(0);
 	GL_state.Texture.SetTarget(GL_TEXTURE_2D);
 	//GL_state.Texture.Enable(Scene_color_texture);