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// license:BSD-3-Clause
// copyright-holders:David Haywood, Ryan Holtz

#ifndef MAME_MACHINE_SPG_RENDERER_H
#define MAME_MACHINE_SPG_RENDERER_H

#pragma once

#include "screen.h"

class spg_renderer_device : public device_t
{
public:
	spg_renderer_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
	spg_renderer_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	void draw_sprites(bool read_from_csspace, bool has_extended_sprites, bool alt_extrasprite_hack, uint32_t palbank, bool highres, const rectangle& cliprect, uint32_t scanline, int priority, uint32_t spritegfxdata_addr, address_space& spc, uint16_t* paletteram, uint16_t* spriteram, int sprlimit);
	void draw_page(bool read_from_csspace, bool has_extended_tilemaps, bool use_alt_tile_addressing, uint32_t palbank, const rectangle& cliprect, uint32_t scanline, int priority, uint32_t tilegfxdata_addr, uint16_t* scrollregs, uint16_t* tilemapregs, address_space& spc, uint16_t* paletteram, uint16_t* scrollram, uint32_t which);
	void new_line(const rectangle& cliprect);

	void apply_saturation_and_fade(bitmap_rgb32& bitmap, const rectangle& cliprect, int scanline);

	void set_video_reg_1c(uint16_t val) { m_video_regs_1c = val; update_vcmp_table(); }
	void set_video_reg_1d(uint16_t val) { m_video_regs_1d = val; update_vcmp_table(); }
	void set_video_reg_1e(uint16_t val) { m_video_regs_1e = val; update_vcmp_table(); }
	void set_video_reg_2a(uint16_t val) { m_video_regs_2a = val; }
	void set_video_reg_30(uint16_t val)
	{
		if (m_video_regs_30 != val)
			m_brightness_or_saturation_dirty = true;

		m_video_regs_30 = val;
	}
	void set_video_reg_3c(uint16_t val)
	{
		if (m_video_regs_3c != val)
			m_brightness_or_saturation_dirty = true;

		m_video_regs_3c = val;
	}
	void set_video_reg_42(uint16_t val) { m_video_regs_42 = val; }

	uint16_t get_video_reg_1c(void) { return m_video_regs_1c; }
	uint16_t get_video_reg_1d(void) { return m_video_regs_1d; }
	uint16_t get_video_reg_1e(void) { return m_video_regs_1e; }
	uint16_t get_video_reg_2a(void) { return m_video_regs_2a; }
	uint16_t get_video_reg_30(void) { return m_video_regs_30; }
	uint16_t get_video_reg_3c(void) { return m_video_regs_3c; }
	uint16_t get_video_reg_42(void) { return m_video_regs_42; }

	// used by some hack logic for the gpl16250 rendering for now
	void set_video_reg_7f(uint16_t val) { m_video_regs_7f = val; }
	uint16_t get_video_reg_7f(void) { return m_video_regs_7f; }

	auto space_read_callback() { return m_space_read_cb.bind(); }
	void set_video_spaces(address_space* cpuspace, address_space* cs_space, int csbase) { m_cpuspace = cpuspace; m_cs_space = cs_space; m_csbase = csbase; }

protected:

	virtual void device_start() override;
	virtual void device_reset() override;

	enum blend_enable_t : const bool
	{
		BlendOff = false,
		BlendOn = true
	};

	enum flipx_t : const bool
	{
		FlipXOff = false,
		FlipXOn = true
	};

	template<spg_renderer_device::blend_enable_t Blend, spg_renderer_device::flipx_t FlipX>
	inline void draw_tilestrip(bool read_from_csspace, uint32_t screenwidth, uint32_t drawwidthmask, const rectangle& cliprect, uint32_t tile_h, uint32_t tile_w, uint32_t tilegfxdata_addr, uint32_t tile, uint32_t tile_scanline, int drawx, bool flip_y, uint32_t palette_offset, const uint32_t nc_bpp, const uint32_t bits_per_row, const uint32_t words_per_tile, address_space &spc, uint16_t* palette, uint8_t blendlevel);

	inline void draw_tilestrip(bool read_from_csspace, uint32_t screenwidth, uint32_t drawwidthmask, spg_renderer_device::blend_enable_t blend, spg_renderer_device::flipx_t flip_x, const rectangle& cliprect, uint32_t tile_h, uint32_t tile_w, uint32_t tilegfxdata_addr, uint32_t tile, uint32_t tile_scanline, int drawx, bool flip_y, uint32_t palette_offset, const uint32_t nc_bpp, const uint32_t bits_per_row, const uint32_t words_per_tile, address_space& spc, uint16_t* paletteram, uint8_t blendlevel);

	inline void draw_sprite(bool read_from_csspace, bool has_extended_sprites, bool alt_extrasprite_hack, uint32_t palbank, bool highres, const rectangle& cliprect, uint32_t scanline, int priority, uint32_t spritegfxdata_addr, uint32_t base_addr, address_space& spc, uint16_t* paletteram, uint16_t* spriteram);
	
	inline void draw_linemap(bool has_extended_tilemaps, const rectangle& cliprect, uint32_t scanline, int priority, uint32_t tilegfxdata_addr, uint16_t* scrollregs, uint16_t* tilemapregs, address_space& spc, uint16_t* paletteram);
	
	inline uint8_t mix_channel(uint8_t a, uint8_t b, uint8_t alpha);

	uint8_t m_rgb5_to_rgb8[32];
	uint32_t m_rgb555_to_rgb888[0x8000];
	uint32_t m_rgb555_to_rgb888_current[0x8000];

private:

	void update_vcmp_table();

	uint16_t m_video_regs_1c;
	uint16_t m_video_regs_1d;
	uint16_t m_video_regs_1e;

	uint16_t m_video_regs_2a;
	uint16_t m_video_regs_42;

	uint16_t m_video_regs_30;
	uint16_t m_video_regs_3c;

	uint16_t m_video_regs_7f;

	uint32_t m_ycmp_table[480];

	devcb_read16 m_space_read_cb;

	address_space* m_cpuspace;
	address_space* m_cs_space;
	int m_csbase;
	bool m_brightness_or_saturation_dirty;
	void update_palette_lookup(void);
	uint16_t m_linebuf[640];
};

DECLARE_DEVICE_TYPE(SPG_RENDERER, spg_renderer_device)


#endif // MAME_MACHINE_SPG_RENDERER_H