58 lines
2 KiB
C
58 lines
2 KiB
C
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#pragma once
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#include <cgv/base/traverser.h>
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#include <cgv/render/context.h>
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#include "lib_begin.h"
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namespace cgv {
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namespace render {
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/** base class for all drawables, which is independent of the used rendering API. */
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class CGV_API drawable : public base::traverse_policy
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{
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private:
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/// store the context
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context* ctx;
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public:
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/// default construction
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drawable();
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/// hide the drawable
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void hide();
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/// show the drawable
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void show();
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/// check whether the drawable is visible
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bool is_visible() const;
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/// access the current context. The context will be available latestly in the init method but not in the contructor.
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context* get_context() const;
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/// set the current focus context, this should only be called by the context itself
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void set_context(context* _ctx);
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/// posts a redraw event to the current context if one is available
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void post_redraw();
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/// forces a redraw right now. This cannot be called from init, init_frame, draw, finish_draw, finish_frame and clear
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void force_redraw();
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/// this method is called after creation or recreation of the context, return whether all necessary functionality is supported
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virtual bool init(context&);
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/// callback to anounce resizing of the output window
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virtual void resize(unsigned int w, unsigned int h);
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/// this method is called in one pass over all drawables before the draw method
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virtual void init_frame(context&);
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/// overload to draw the content of this drawable
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virtual void draw(context&);
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/// this method is called when the current drawable is left in a tree traversal that calls the draw method
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virtual void finish_draw(context&);
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/// this method is called in one pass over all drawables after drawing
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virtual void finish_frame(context&);
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/// this method is called in one pass over all drawables after finish frame
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virtual void after_finish(cgv::render::context&);
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/// clear all objects living in the context like textures or display lists
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virtual void clear(context&);
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};
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}
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}
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#include <cgv/config/lib_end.h>
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