summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/sprite.h
blob: f10537f990087048978636a8f067972341aeff2b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************

    General sprite handling helpers

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

#pragma once

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

#ifndef __SPRITE_H__
#define __SPRITE_H__


// ======================> sparse_dirty_rect

// class representing a single dirty region
class sparse_dirty_rect : public rectangle
{
	friend class simple_list<sparse_dirty_rect>;

public:
	sparse_dirty_rect(): m_next(nullptr) { }
	// getters
	const sparse_dirty_rect *next() const { return m_next; }

private:
	// internal state
	sparse_dirty_rect * m_next;
};


// ======================> sparse_dirty_bitmap

class sparse_dirty_bitmap
{
public:
	// construction/destruction
	sparse_dirty_bitmap(int granularity = 3);
	sparse_dirty_bitmap(int width, int height, int granularity = 3);

	// dirtying operations - partially interecting tiles are dirtied
	void dirty(const rectangle &rect) { dirty(rect.left(), rect.right(), rect.top(), rect.bottom()); }
	void dirty(INT32 left, INT32 right, INT32 top, INT32 bottom);
	void dirty_all() { dirty(0, m_width - 1, 0, m_height - 1); }

	// cleaning operations - partially intersecting tiles are NOT cleaned
	void clean(const rectangle &rect) { clean(rect.left(), rect.right(), rect.top(), rect.bottom()); }
	void clean(INT32 left, INT32 right, INT32 top, INT32 bottom);
	void clean_all() { clean(0, m_width - 1, 0, m_height - 1); }

	// convert to rect list
	sparse_dirty_rect *first_dirty_rect() { rectangle fullrect(0, m_width - 1, 0, m_height - 1); return first_dirty_rect(fullrect); }
	sparse_dirty_rect *first_dirty_rect(const rectangle &cliprect);

	// dynamic resizing
	void resize(int width, int height);

private:
	// invalidate cached rect list
	void invalidate_rect_list() { m_rect_list_bounds.set(0, -1, 0, -1); }

	// internal state
	int                     m_width;
	int                     m_height;
	int                     m_granularity;
	bitmap_ind8             m_bitmap;
	rectangle               m_rect_list_bounds;
	fixed_allocator<sparse_dirty_rect>  m_rect_allocator;
	simple_list<sparse_dirty_rect> m_rect_list;
};


// ======================> sprite_device

template<typename _SpriteRAMType, class _BitmapType>
class sprite_device : public device_t
{
	// constants
	static const int BITMAP_SLOP = 16;

protected:
	// construction/destruction - only for subclasses
	sprite_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, const char *shortname, const char *file, int dirty_granularity = 3)
		: device_t(mconfig, type, name, tag, owner, 0, shortname, file),
			m_xorigin(0),
			m_yorigin(0),
			m_spriteram(nullptr),
			m_spriteram_bytes(0),
			m_dirty(dirty_granularity)
	{
		force_clear();
	}

public:
	// getters
	INT32 xorigin() const { return m_xorigin; }
	INT32 yorigin() const { return m_yorigin; }
	_BitmapType &bitmap() { return m_bitmap; }
	sparse_dirty_rect *first_dirty_rect() { return m_dirty.first_dirty_rect(); }
	sparse_dirty_rect *first_dirty_rect(const rectangle &cliprect) { return m_dirty.first_dirty_rect(cliprect); }
	_SpriteRAMType *spriteram() const { return m_spriteram; }
	UINT32 spriteram_bytes() const { return m_spriteram_bytes; }
	UINT32 spriteram_elements() const { return m_spriteram_bytes / sizeof(_SpriteRAMType); }
	_SpriteRAMType *buffer() { return &m_buffer[0]; }

	// static configuration
	static void static_set_xorigin(device_t &device, int origin) { downcast<sprite_device &>(device).m_xorigin = origin; }
	static void static_set_yorigin(device_t &device, int origin) { downcast<sprite_device &>(device).m_yorigin = origin; }
	static void static_set_origin(device_t &device, int xorigin, int yorigin) { static_set_xorigin(device, xorigin); static_set_yorigin(device, yorigin); }

	// configuration
	void set_spriteram(_SpriteRAMType *base, UINT32 bytes) { m_spriteram = base; m_spriteram_bytes = bytes; m_buffer.resize(m_spriteram_bytes / sizeof(_SpriteRAMType)); }
	void set_origin(INT32 xorigin = 0, INT32 yorigin = 0) { m_xorigin = xorigin; m_yorigin = yorigin; }
	void set_xorigin(INT32 xorigin) { m_xorigin = xorigin; }
	void set_yorigin(INT32 yorigin) { m_yorigin = yorigin; }

	// buffering
	void copy_to_buffer() { memcpy(m_buffer, m_spriteram, m_spriteram_bytes); }

	// clearing
	void clear() { clear(m_bitmap.cliprect()); }
	void clear(const rectangle &cliprect)
	{
		for (const sparse_dirty_rect *rect = m_dirty.first_dirty_rect(cliprect); rect != nullptr; rect = rect->next())
			m_bitmap.fill(~0, *rect);
		m_dirty.clean(cliprect);
	}

	// force clear (don't use dirty rects)
	void force_clear()
	{
		m_bitmap.fill(~0);
		m_dirty.clean_all();
	}

	// drawing
	void draw_async(const rectangle &cliprect, bool clearit = true)
	{
		// if the cliprect exceeds our current bitmap dimensions, expand
		if (cliprect.right() >= m_bitmap.width() || cliprect.bottom() >= m_bitmap.height())
		{
			int new_width = MAX(cliprect.right() + 1, m_bitmap.width());
			int new_height = MAX(cliprect.bottom() + 1, m_bitmap.height());
			m_bitmap.resize(new_width, new_height, BITMAP_SLOP, BITMAP_SLOP);
			m_dirty.resize(new_width, new_height);
		}

		// clear out the region
		if (clearit)
			clear(cliprect);

		// wrap the bitmap, adjusting for x/y origins
		_BitmapType wrapped(&m_bitmap.pix(0) - m_xorigin - m_yorigin * m_bitmap.rowpixels(), m_xorigin + cliprect.right() + 1, m_yorigin + cliprect.bottom() + 1, m_bitmap.rowpixels());

		// compute adjusted cliprect in source space
		rectangle adjusted = cliprect;
		adjusted.offset(m_xorigin, m_yorigin);

		// render
		draw(wrapped, adjusted);
	}

protected:
	// device-level overrides
	virtual void device_start() override
	{
		// find spriteram
		memory_share *spriteram = owner()->memshare(tag());
		if (spriteram != nullptr)
		{
			set_spriteram(reinterpret_cast<_SpriteRAMType *>(spriteram->ptr()), spriteram->bytes());

			// save states
			save_item(NAME(m_buffer));
		}
	}

	// subclass overrides
	virtual void draw(_BitmapType &bitmap, const rectangle &cliprect) = 0;

	// subclass helpers
	void mark_dirty(const rectangle &rect) { mark_dirty(rect.left(), rect.right(), rect.top(), rect.bottom()); }
	void mark_dirty(INT32 left, INT32 right, INT32 top, INT32 bottom) { m_dirty.dirty(left - m_xorigin, right - m_xorigin, top - m_yorigin, bottom - m_yorigin); }

private:
	// configuration
	INT32                           m_xorigin;              // X origin for drawing
	INT32                           m_yorigin;              // Y origin for drawing

	// memory pointers and buffers
	_SpriteRAMType *                m_spriteram;            // pointer to spriteram pointer
	INT32                           m_spriteram_bytes;      // size of sprite RAM in bytes
	std::vector<_SpriteRAMType>          m_buffer;               // buffered spriteram for those that use it

	// bitmaps
	_BitmapType                     m_bitmap;               // live bitmap
	sparse_dirty_bitmap             m_dirty;                // dirty bitmap
};

typedef sprite_device<UINT8, bitmap_ind16> sprite8_device_ind16;
typedef sprite_device<UINT16, bitmap_ind16> sprite16_device_ind16;
typedef sprite_device<UINT32, bitmap_ind16> sprite32_device_ind16;

typedef sprite_device<UINT8, bitmap_ind32> sprite8_device_ind32;
typedef sprite_device<UINT16, bitmap_ind32> sprite16_device_ind32;
typedef sprite_device<UINT32, bitmap_ind32> sprite32_device_ind32;


#endif  // __SPRITE_H__