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// 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__
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