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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************

    screen.h

    Core MAME screen device.

***************************************************************************/

#include <utility>

#pragma once

#ifndef __EMU_H__
#error Dont include this file directly; include emu.h instead.
#endif

#ifndef __SCREEN_H__
#define __SCREEN_H__


//**************************************************************************
//  CONSTANTS
//**************************************************************************

// screen types
enum screen_type_enum
{
	SCREEN_TYPE_INVALID = 0,
	SCREEN_TYPE_RASTER,
	SCREEN_TYPE_VECTOR,
	SCREEN_TYPE_LCD,
	SCREEN_TYPE_SVG
};

// texture formats
enum texture_format
{
	TEXFORMAT_UNDEFINED = 0,                            // require a format to be specified
	TEXFORMAT_PALETTE16,                                // 16bpp palettized, alpha ignored
	TEXFORMAT_PALETTEA16,                               // 16bpp palettized, alpha respected
	TEXFORMAT_RGB32,                                    // 32bpp 8-8-8 RGB
	TEXFORMAT_ARGB32,                                   // 32bpp 8-8-8-8 ARGB
	TEXFORMAT_YUY16                                     // 16bpp 8-8 Y/Cb, Y/Cr in sequence
};

// screen_update callback flags
const UINT32 UPDATE_HAS_NOT_CHANGED = 0x0001;   // the video has not changed

/*!
 @defgroup flags for video_attributes
 @{
 @def VIDEO_UPDATE_BEFORE_VBLANK
 update_video called at the start of the VBLANK period
 @todo hack, remove me
 
 @def VIDEO_UPDATE_AFTER_VBLANK
 update_video called at the end of the VBLANK period
 @todo hack, remove me

 @def VIDEO_SELF_RENDER
 indicates VIDEO_UPDATE will add container bits itself
 
 @def VIDEO_ALWAYS_UPDATE
 force VIDEO_UPDATE to be called even for skipped frames.
 @todo in case you need this one for model updating, then you're doing it wrong (read: hack)
 
 @def VIDEO_UPDATE_SCANLINE
 calls VIDEO_UPDATE for every visible scanline, even for skipped frames
 
 @}
 */

#define VIDEO_UPDATE_BEFORE_VBLANK      0x0000
#define VIDEO_UPDATE_AFTER_VBLANK       0x0004

#define VIDEO_SELF_RENDER               0x0008
#define VIDEO_ALWAYS_UPDATE             0x0080
#define VIDEO_UPDATE_SCANLINE           0x0100


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// forward references
class render_texture;
class screen_device;


// ======================> screen_bitmap

class screen_bitmap
{
private:
	// internal helpers
	bitmap_t &live() { assert(m_live != nullptr); return *m_live; }
	const bitmap_t &live() const { assert(m_live != nullptr); return *m_live; }

public:
	// construction/destruction
	screen_bitmap()
		: m_format(BITMAP_FORMAT_RGB32),
			m_texformat(TEXFORMAT_RGB32),
			m_live(&m_rgb32) { }
	screen_bitmap(bitmap_ind16 &orig)
		: m_format(BITMAP_FORMAT_IND16),
			m_texformat(TEXFORMAT_PALETTE16),
			m_live(&m_ind16),
			m_ind16(orig, orig.cliprect()) { }
	screen_bitmap(bitmap_rgb32 &orig)
		: m_format(BITMAP_FORMAT_RGB32),
			m_texformat(TEXFORMAT_RGB32),
			m_live(&m_rgb32),
			m_rgb32(orig, orig.cliprect()) { }

	// resizing
	void resize(int width, int height) { live().resize(width, height); }

	// conversion
	operator bitmap_t &() { return live(); }
	bitmap_ind16 &as_ind16() { assert(m_format == BITMAP_FORMAT_IND16); return m_ind16; }
	bitmap_rgb32 &as_rgb32() { assert(m_format == BITMAP_FORMAT_RGB32); return m_rgb32; }

	// getters
	INT32 width() const { return live().width(); }
	INT32 height() const { return live().height(); }
	INT32 rowpixels() const { return live().rowpixels(); }
	INT32 rowbytes() const { return live().rowbytes(); }
	UINT8 bpp() const { return live().bpp(); }
	bitmap_format format() const { return m_format; }
	texture_format texformat() const { return m_texformat; }
	bool valid() const { return live().valid(); }
	palette_t *palette() const { return live().palette(); }
	const rectangle &cliprect() const { return live().cliprect(); }

	// operations
	void set_palette(palette_t *palette) { live().set_palette(palette); }
	void set_format(bitmap_format format, texture_format texformat)
	{
		m_format = format;
		m_texformat = texformat;
		switch (format)
		{
			case BITMAP_FORMAT_IND16:   m_live = &m_ind16;  break;
			case BITMAP_FORMAT_RGB32:   m_live = &m_rgb32;  break;
			default:                    m_live = nullptr;      break;
		}
		m_ind16.reset();
		m_rgb32.reset();
	}

private:
	// internal state
	bitmap_format       m_format;
	texture_format      m_texformat;
	bitmap_t *          m_live;
	bitmap_ind16        m_ind16;
	bitmap_rgb32        m_rgb32;
};


// ======================> other delegate types

typedef delegate<void (screen_device &, bool)> vblank_state_delegate;

typedef device_delegate<UINT32 (screen_device &, bitmap_ind16 &, const rectangle &)> screen_update_ind16_delegate;
typedef device_delegate<UINT32 (screen_device &, bitmap_rgb32 &, const rectangle &)> screen_update_rgb32_delegate;
typedef device_delegate<void (screen_device &, bool)> screen_vblank_delegate;


// ======================> screen_device

class screen_device_svg_renderer;
class render_container;

class screen_device : public device_t
{
	friend class render_manager;

public:
	// construction/destruction
	screen_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
	~screen_device();

	// configuration readers
	screen_type_enum screen_type() const { return m_type; }
	int width() const { return m_width; }
	int height() const { return m_height; }
	const rectangle &visible_area() const { return m_visarea; }
	const rectangle &cliprect() const { return m_bitmap[0].cliprect(); }
	bool oldstyle_vblank_supplied() const { return m_oldstyle_vblank_supplied; }
	attoseconds_t refresh_attoseconds() const { return m_refresh; }
	attoseconds_t vblank_attoseconds() const { return m_vblank; }
	bitmap_format format() const { return !m_screen_update_ind16.isnull() ? BITMAP_FORMAT_IND16 : BITMAP_FORMAT_RGB32; }
	float xoffset() const { return m_xoffset; }
	float yoffset() const { return m_yoffset; }
	float xscale() const { return m_xscale; }
	float yscale() const { return m_yscale; }
	bool have_screen_update() const { return !m_screen_update_ind16.isnull() && !m_screen_update_rgb32.isnull(); }

	// inline configuration helpers
	static void static_set_type(device_t &device, screen_type_enum type);
	static void static_set_raw(device_t &device, UINT32 pixclock, UINT16 htotal, UINT16 hbend, UINT16 hbstart, UINT16 vtotal, UINT16 vbend, UINT16 vbstart);
	static void static_set_refresh(device_t &device, attoseconds_t rate);
	static void static_set_vblank_time(device_t &device, attoseconds_t time);
	static void static_set_size(device_t &device, UINT16 width, UINT16 height);
	static void static_set_visarea(device_t &device, INT16 minx, INT16 maxx, INT16 miny, INT16 maxy);
	static void static_set_default_position(device_t &device, double xscale, double xoffs, double yscale, double yoffs);
	static void static_set_screen_update(device_t &device, screen_update_ind16_delegate callback);
	static void static_set_screen_update(device_t &device, screen_update_rgb32_delegate callback);
	static void static_set_screen_vblank(device_t &device, screen_vblank_delegate callback);
	static void static_set_palette(device_t &device, const char *tag);
	static void static_set_video_attributes(device_t &device, UINT32 flags);
	static void static_set_color(device_t &device, rgb_t color);
	static void static_set_svg_region(device_t &device, const char *region);

	// information getters
	render_container &container() const { assert(m_container != nullptr); return *m_container; }
	bitmap_ind8 &priority() { return m_priority; }
	palette_device &palette() const { assert(m_palette.found()); return *m_palette; }
	bool has_palette() const { return m_palette.found(); }

	// dynamic configuration
	void configure(int width, int height, const rectangle &visarea, attoseconds_t frame_period);
	void reset_origin(int beamy = 0, int beamx = 0);
	void set_visible_area(int min_x, int max_x, int min_y, int max_y);
	void set_brightness(UINT8 brightness) { m_brightness = brightness; }

	// beam positioning and state
	int vpos() const;
	int hpos() const;
	bool vblank() const { return (machine().time() < m_vblank_end_time); }
	DECLARE_READ_LINE_MEMBER(vblank) { return (machine().time() < m_vblank_end_time) ? ASSERT_LINE : CLEAR_LINE; }
	DECLARE_READ_LINE_MEMBER(hblank) { int curpos = hpos(); return (curpos < m_visarea.min_x || curpos > m_visarea.max_x) ? ASSERT_LINE : CLEAR_LINE; }

	// timing
	attotime time_until_pos(int vpos, int hpos = 0) const;
	attotime time_until_vblank_start() const { return time_until_pos(m_visarea.max_y + 1); }
	attotime time_until_vblank_end() const;
	attotime time_until_update() const { return (m_video_attributes & VIDEO_UPDATE_AFTER_VBLANK) ? time_until_vblank_end() : time_until_vblank_start(); }
	attotime scan_period() const { return attotime(0, m_scantime); }
	attotime frame_period() const { return attotime(0, m_frame_period); }
	UINT64 frame_number() const { return m_frame_number; }

	// updating
	int partial_updates() const { return m_partial_updates_this_frame; }
	bool update_partial(int scanline);
	void update_now();
	void reset_partial_updates();

	// additional helpers
	void register_vblank_callback(vblank_state_delegate vblank_callback);
	void register_screen_bitmap(bitmap_t &bitmap);

	// internal to the video system
	bool update_quads();
	void update_burnin();

	// globally accessible constants
	static const int DEFAULT_FRAME_RATE = 60;
	static const attotime DEFAULT_FRAME_PERIOD;

private:
	// timer IDs
	enum
	{
		TID_VBLANK_START,
		TID_VBLANK_END,
		TID_SCANLINE0,
		TID_SCANLINE
	};

	// device-level overrides
	virtual void device_validity_check(validity_checker &valid) const override;
	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_stop() override;
	virtual void device_post_load() override;
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;

	// internal helpers
	void set_container(render_container &container) { m_container = &container; }
	void realloc_screen_bitmaps();
	void vblank_begin();
	void vblank_end();
	void finalize_burnin();
	void load_effect_overlay(const char *filename);

	// inline configuration data
	screen_type_enum    m_type;                     // type of screen
	bool                m_oldstyle_vblank_supplied; // MCFG_SCREEN_VBLANK_TIME macro used
	attoseconds_t       m_refresh;                  // default refresh period
	attoseconds_t       m_vblank;                   // duration of a VBLANK
	float               m_xoffset, m_yoffset;       // default X/Y offsets
	float               m_xscale, m_yscale;         // default X/Y scale factor
	screen_update_ind16_delegate m_screen_update_ind16; // screen update callback (16-bit palette)
	screen_update_rgb32_delegate m_screen_update_rgb32; // screen update callback (32-bit RGB)
	screen_vblank_delegate m_screen_vblank;         // screen vblank callback
	optional_device<palette_device> m_palette;      // our palette
	UINT32              m_video_attributes;         // flags describing the video system
	const char *        m_svg_region;               // the region in which the svg data is in

	// internal state
	render_container *  m_container;                // pointer to our container
	std::unique_ptr<screen_device_svg_renderer> m_svg; // the svg renderer
	// dimensions
	int                 m_width;                    // current width (HTOTAL)
	int                 m_height;                   // current height (VTOTAL)
	rectangle           m_visarea;                  // current visible area (HBLANK end/start, VBLANK end/start)

	// textures and bitmaps
	texture_format      m_texformat;                // texture format
	render_texture *    m_texture[2];               // 2x textures for the screen bitmap
	screen_bitmap       m_bitmap[2];                // 2x bitmaps for rendering
	bitmap_ind8         m_priority;                 // priority bitmap
	bitmap_ind64        m_burnin;                   // burn-in bitmap
	UINT8               m_curbitmap;                // current bitmap index
	UINT8               m_curtexture;               // current texture index
	bool                m_changed;                  // has this bitmap changed?
	INT32               m_last_partial_scan;        // scanline of last partial update
	INT32               m_partial_scan_hpos;        // horizontal pixel last rendered on this partial scanline
	bitmap_argb32       m_screen_overlay_bitmap;    // screen overlay bitmap
	UINT32              m_unique_id;                // unique id for this screen_device
	rgb_t               m_color;                    // render color
	UINT8               m_brightness;               // global brightness

	// screen timing
	attoseconds_t       m_frame_period;             // attoseconds per frame
	attoseconds_t       m_scantime;                 // attoseconds per scanline
	attoseconds_t       m_pixeltime;                // attoseconds per pixel
	attoseconds_t       m_vblank_period;            // attoseconds per VBLANK period
	attotime            m_vblank_start_time;        // time of last VBLANK start
	attotime            m_vblank_end_time;          // time of last VBLANK end
	emu_timer *         m_vblank_begin_timer;       // timer to signal VBLANK start
	emu_timer *         m_vblank_end_timer;         // timer to signal VBLANK end
	emu_timer *         m_scanline0_timer;          // scanline 0 timer
	emu_timer *         m_scanline_timer;           // scanline timer
	UINT64              m_frame_number;             // the current frame number
	UINT32              m_partial_updates_this_frame;// partial update counter this frame

	// VBLANK callbacks
	class callback_item
	{
	public:
		callback_item(vblank_state_delegate callback)
			: m_callback(std::move(callback)) { }

		vblank_state_delegate       m_callback;
	};
	std::vector<std::unique_ptr<callback_item>> m_callback_list;     // list of VBLANK callbacks

	// auto-sizing bitmaps
	class auto_bitmap_item
	{
	public:
		auto_bitmap_item(bitmap_t &bitmap)
			: m_bitmap(bitmap) { }
		bitmap_t &                  m_bitmap;
	};
	std::vector<std::unique_ptr<auto_bitmap_item>> m_auto_bitmap_list; // list of registered bitmaps

	// static data
	static UINT32       m_id_counter; // incremented for each constructed screen_device,
										// used as a unique identifier during runtime
};

// device type definition
extern const device_type SCREEN;

// iterator helper
typedef device_type_iterator<&device_creator<screen_device>, screen_device> screen_device_iterator;

/*!
 @defgroup Screen device configuration macros
 @{
 @def MCFG_SCREEN_ADD
  Add a new legacy screen color device
 
 @def MCFG_SCREEN_ADD_MONOCHROME
  Add a new legacy monochrome screen device
 
 @def MCFG_SCREEN_MODIFY
  Modify a legacy screen device
 
 @def MCFG_SCREEN_TYPE
  Modify the screen device type
  @see screen_type_enum
 
 @def MCFG_SCREEN_RAW_PARAMS
  Configures screen parameters for the given screen. 
  @remark It's better than using @see MCFG_SCREEN_REFRESH_RATE and @see MCFG_SCREEN_VBLANK_TIME but still not enough.
 
  @param _pixclock 
  Pixel Clock frequency value
 
  @param _htotal 
  Total number of horizontal pixels, including hblank period.
 
  @param _hbend 
  Horizontal pixel position for HBlank end event, also first pixel where screen rectangle is visible.
 
  @param _hbstart 
  Horizontal pixel position for HBlank start event, also last pixel where screen rectangle is visible.
 
  @param _vtotal 
  Total number of vertical pixels, including vblank period.
 
  @param _vbend 
  Vertical pixel position for VBlank end event, also first pixel where screen rectangle is visible.
 
  @param _vbstart 
  Vertical pixel position for VBlank start event, also last pixel where screen rectangle is visible.
 
 @def MCFG_SCREEN_REFRESH_RATE
  Sets the number of Frames Per Second for this screen
  @remarks Please use @see MCFG_SCREEN_RAW_PARAMS instead. Gives imprecise timings.

  @param _rate 
  FPS number

 @def MCFG_SCREEN_VBLANK_TIME
  Sets the vblank time of the given screen
  @remarks Please use @see MCFG_SCREEN_RAW_PARAMS instead. Gives imprecise timings.
 
  @param _time 
  Time parameter, in attotime value

 @def MCFG_SCREEN_SIZE
  Sets total screen size, including H/V-Blanks
  @remarks Please use @see MCFG_SCREEN_RAW_PARAMS instead. Gives imprecise timings.
  
  @param _width 
  Screen horizontal size

  @param _height
  Screen vertical size
  
 @def MCFG_SCREEN_VISIBLE_AREA
  Sets screen visible area
  @remarks Please use MCFG_SCREEN_RAW_PARAMS instead. Gives imprecise timings.

  @param _minx 
  Screen left border
  
  @param _maxx 
  Screen right border, must be in N-1 format
 
  @param _miny 
  Screen top border
  
  @param _maxx 
  Screen bottom border, must be in N-1 format
  
 @}
 */

#define MCFG_SCREEN_ADD(_tag, _type) \
	MCFG_DEVICE_ADD(_tag, SCREEN, 0) \
	MCFG_SCREEN_TYPE(_type)

#define MCFG_SCREEN_ADD_MONOCHROME(_tag, _type, _color) \
	MCFG_DEVICE_ADD(_tag, SCREEN, 0) \
	MCFG_SCREEN_TYPE(_type) \
	MCFG_SCREEN_COLOR(_color)

#define MCFG_SCREEN_MODIFY(_tag) \
	MCFG_DEVICE_MODIFY(_tag)

#define MCFG_SCREEN_TYPE(_type) \
	screen_device::static_set_type(*device, SCREEN_TYPE_##_type);

#define MCFG_SCREEN_SVG_ADD(_tag, _region) \
	MCFG_DEVICE_ADD(_tag, SCREEN, 0) \
	MCFG_SCREEN_TYPE(SVG) \
	screen_device::static_set_svg_region(*device, _region);

#define MCFG_SCREEN_RAW_PARAMS(_pixclock, _htotal, _hbend, _hbstart, _vtotal, _vbend, _vbstart) \
	screen_device::static_set_raw(*device, _pixclock, _htotal, _hbend, _hbstart, _vtotal, _vbend, _vbstart);

#define MCFG_SCREEN_REFRESH_RATE(_rate) \
	screen_device::static_set_refresh(*device, HZ_TO_ATTOSECONDS(_rate));

#define MCFG_SCREEN_VBLANK_TIME(_time) \
	screen_device::static_set_vblank_time(*device, _time);

#define MCFG_SCREEN_SIZE(_width, _height) \
	screen_device::static_set_size(*device, _width, _height);

#define MCFG_SCREEN_VISIBLE_AREA(_minx, _maxx, _miny, _maxy) \
	screen_device::static_set_visarea(*device, _minx, _maxx, _miny, _maxy);
#define MCFG_SCREEN_DEFAULT_POSITION(_xscale, _xoffs, _yscale, _yoffs)  \
	screen_device::static_set_default_position(*device, _xscale, _xoffs, _yscale, _yoffs);
#define MCFG_SCREEN_UPDATE_DRIVER(_class, _method) \
	screen_device::static_set_screen_update(*device, screen_update_delegate_smart(&_class::_method, #_class "::" #_method, nullptr));
#define MCFG_SCREEN_UPDATE_DEVICE(_device, _class, _method) \
	screen_device::static_set_screen_update(*device, screen_update_delegate_smart(&_class::_method, #_class "::" #_method, _device));
#define MCFG_SCREEN_VBLANK_NONE() \
	screen_device::static_set_screen_vblank(*device, screen_vblank_delegate());
#define MCFG_SCREEN_VBLANK_DRIVER(_class, _method) \
	screen_device::static_set_screen_vblank(*device, screen_vblank_delegate(&_class::_method, #_class "::" #_method, nullptr, (_class *)nullptr));
#define MCFG_SCREEN_VBLANK_DEVICE(_device, _class, _method) \
	screen_device::static_set_screen_vblank(*device, screen_vblank_delegate(&_class::_method, #_class "::" #_method, _device, (_class *)nullptr));
#define MCFG_SCREEN_PALETTE(_palette_tag) \
	screen_device::static_set_palette(*device, "^" _palette_tag);
#define MCFG_SCREEN_NO_PALETTE \
	screen_device::static_set_palette(*device, FINDER_DUMMY_TAG);
#define MCFG_SCREEN_VIDEO_ATTRIBUTES(_flags) \
	screen_device::static_set_video_attributes(*device, _flags);
#define MCFG_SCREEN_COLOR(_color) \
	screen_device::static_set_color(*device, _color);


//**************************************************************************
//  INLINE HELPERS
//**************************************************************************

//-------------------------------------------------
//  screen_update_delegate_smart - collection of
//  inline helpers which create the appropriate
//  screen_update_delegate based on the input
//  function type
//-------------------------------------------------

template<class _FunctionClass>
inline screen_update_ind16_delegate screen_update_delegate_smart(UINT32 (_FunctionClass::*callback)(screen_device &, bitmap_ind16 &, const rectangle &), const char *name, const char *devname)
{
	return screen_update_ind16_delegate(callback, name, devname, (_FunctionClass *)nullptr);
}

template<class _FunctionClass>
inline screen_update_rgb32_delegate screen_update_delegate_smart(UINT32 (_FunctionClass::*callback)(screen_device &, bitmap_rgb32 &, const rectangle &), const char *name, const char *devname)
{
	return screen_update_rgb32_delegate(callback, name, devname, (_FunctionClass *)nullptr);
}


#endif  /* __SCREEN_H__ */