105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
#ifndef _framebuffer__hpp__included__
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#define _framebuffer__hpp__included__
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#include "core/render.hpp"
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#include "core/window.hpp"
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#include <stdexcept>
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/**
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* Triple buffering logic.
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*/
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class triplebuffer_logic
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{
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public:
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/**
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* Create new triple buffer logic.
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*/
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triplebuffer_logic() throw(std::bad_alloc);
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/**
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* Destructor.
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*/
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~triplebuffer_logic() throw();
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/**
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* Get index for write buffer.Also starts write cycle.
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*
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* Returns: Write buffer index (0-2).
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*/
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unsigned start_write() throw();
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/**
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* Notify that write cycle has ended.
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*/
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void end_write() throw();
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/**
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* Get index for read buffer. Also starts read cycle.
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*
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* Returns: Read buffer index (0-2).
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*/
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unsigned start_read() throw();
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/**
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* Notify that read cycle has ended.
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*/
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void end_read() throw();
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private:
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triplebuffer_logic(triplebuffer_logic&);
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triplebuffer_logic& operator=(triplebuffer_logic&);
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mutex* mut;
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unsigned read_active;
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unsigned write_active;
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unsigned read_active_slot;
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unsigned write_active_slot;
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unsigned last_complete_slot;
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};
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/**
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* The main framebuffer.
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*/
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extern lcscreen framebuffer;
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/**
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* Special screen: "NO SIGNAL".
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*/
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extern lcscreen screen_nosignal;
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/**
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* Special screen: "SYSTEM STATE CORRUPT".
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*/
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extern lcscreen screen_corrupt;
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/**
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* The main screen to draw on.
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*/
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extern screen<false> main_screen;
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/**
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* Initialize special screens.
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*
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* throws std::bad_alloc: Not enough memory.
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*/
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void init_special_screens() throw(std::bad_alloc);
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/**
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* Copy framebuffer to backing store, running Lua hooks if any.
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*/
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void redraw_framebuffer(lcscreen& torender, bool no_lua = false, bool spontaneous = false);
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/**
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* Redraw the framebuffer, reusing contents from last redraw. Runs lua hooks if last redraw ran them.
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*/
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void redraw_framebuffer();
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/**
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* Return last complete framebuffer.
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*/
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lcscreen get_framebuffer() throw(std::bad_alloc);
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/**
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* Render framebuffer to main screen.
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*/
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void render_framebuffer();
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/**
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* Get the size of current framebuffer.
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*/
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std::pair<uint32_t, uint32_t> get_framebuffer_size();
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/**
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* Take a screenshot to specified file.
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*/
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void take_screenshot(const std::string& file) throw(std::bad_alloc, std::runtime_error);
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/**
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* Get scale factors.
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*/
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std::pair<uint32_t, uint32_t> get_scale_factors(uint32_t width, uint32_t height);
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#endif
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