自学教程：C++ tilemap_draw函数代码示例

static void draw_background( struct mame_bitmap *bitmap, const struct rectangle *cliprect ){	int dx = -48;	int dy = 16;	int attributes = grchamp_vreg1[0x3];		/*	----xxxx	Analog Tachometer output		**	---x----	palette select		**	--x-----	enables msb of bg#3 xscroll		**	xx------	unused		*/	int color = (attributes&0x10)?1:0;	if( color!=palette_bank )	{		palette_bank = color;		tilemap_mark_all_tiles_dirty( ALL_TILEMAPS );	}	tilemap_set_scrollx( tilemap[0], 0, dx-(grchamp_vreg1[0x0]+grchamp_vreg1[0x1]*256) );	tilemap_set_scrolly( tilemap[0], 0, dy - grchamp_vreg1[0x2] );	tilemap_set_scrollx( tilemap[1], 0, dx-(grchamp_vreg1[0x5]+grchamp_vreg1[0x6]*256) );	tilemap_set_scrolly( tilemap[1], 0, dy - grchamp_vreg1[0x7] );	tilemap_set_scrollx( tilemap[2], 0, dx-(grchamp_vreg1[0x9]+ ((attributes&0x20)?256:(grchamp_vreg1[0xa]*256))));	tilemap_set_scrolly( tilemap[2], 0, dy - grchamp_vreg1[0xb] );	tilemap_draw(bitmap,cliprect,tilemap[0],0,0);	tilemap_draw(bitmap,cliprect,tilemap[1],0,0);	tilemap_draw(bitmap,cliprect,tilemap[2],0,0);}

static SCREEN_UPDATE(galaxi){	galaxi_state *state = screen->machine().driver_data<galaxi_state>();	int layers_ctrl = -1;#ifdef MAME_DEBUG	if (screen->machine().input().code_pressed(KEYCODE_R))	// remapped due to inputs changes.	{		int msk = 0;		if (screen->machine().input().code_pressed(KEYCODE_T))	msk |= 1;		if (screen->machine().input().code_pressed(KEYCODE_Y))	msk |= 2;		if (screen->machine().input().code_pressed(KEYCODE_U))	msk |= 4;		if (screen->machine().input().code_pressed(KEYCODE_I))	msk |= 8;		if (screen->machine().input().code_pressed(KEYCODE_O))	msk |= 16;		if (msk != 0) layers_ctrl &= msk;	}#endif	if (layers_ctrl & 1)	tilemap_draw(bitmap, cliprect, state->m_bg1_tmap, TILEMAP_DRAW_OPAQUE, 0);	else				bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine()));	if (layers_ctrl & 2)	tilemap_draw(bitmap, cliprect, state->m_bg2_tmap, 0, 0);	if (layers_ctrl & 4)	tilemap_draw(bitmap, cliprect, state->m_bg3_tmap, 0, 0);	if (layers_ctrl & 8)	tilemap_draw(bitmap, cliprect, state->m_bg4_tmap, 0, 0);	if (layers_ctrl & 16)	tilemap_draw(bitmap, cliprect, state->m_fg_tmap, 0, 0);	return 0;}

static SCREEN_UPDATE( dunhuang ){	dunhuang_state *state = screen->machine().driver_data<dunhuang_state>();	int layers_ctrl = -1;#if DUNHUANG_DEBUGif (input_code_pressed(screen->machine(), KEYCODE_Z)){	int msk = 0;	if (input_code_pressed(screen->machine(), KEYCODE_Q))	msk |= 1;	if (input_code_pressed(screen->machine(), KEYCODE_W))	msk |= 2;	if (msk != 0) layers_ctrl &= msk;}#endif	bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine()));	switch (state->m_layers)	{		case 0x04:	// girl select: bg over fg			if (layers_ctrl & 2)	tilemap_draw(bitmap,cliprect, state->m_tmap2, TILEMAP_DRAW_OPAQUE, 0);			if (layers_ctrl & 1)	tilemap_draw(bitmap,cliprect, state->m_tmap,  0, 0);			break;		case 0x05:	// dips: must hide fg			if (layers_ctrl & 1)	tilemap_draw(bitmap,cliprect, state->m_tmap,  TILEMAP_DRAW_OPAQUE, 0);			break;		case 0x07:	// game,demo: fg over bg		default:			if (layers_ctrl & 1)	tilemap_draw(bitmap,cliprect, state->m_tmap,  TILEMAP_DRAW_OPAQUE, 0);			if (layers_ctrl & 2)	tilemap_draw(bitmap,cliprect, state->m_tmap2, 0, 0);			break;	}	return 0;}

static VIDEO_UPDATE( drtomy ){	tilemap_draw(bitmap,cliprect,tilemap_bg,0,0);	tilemap_draw(bitmap,cliprect,tilemap_fg,0,0);	draw_sprites(screen->machine,bitmap,cliprect);	return 0;}

void cave_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh){	int pri;	int layers_ctrl = -1;	int	glob_flipx	=	READ_WORD(&cave_videoregs[0]) & 0x8000;	int	glob_flipy	=	READ_WORD(&cave_videoregs[2]) & 0x8000;	tilemap_set_flip(ALL_TILEMAPS, (glob_flipx ? TILEMAP_FLIPX : 0) | (glob_flipy ? TILEMAP_FLIPY : 0) );	tilemap_set_enable( tilemap_0, READ_WORD(&cave_vctrl_0[4]) & 1 );	tilemap_set_scrollx(tilemap_0, 0, READ_WORD(&cave_vctrl_0[0]) );	tilemap_set_scrolly(tilemap_0, 0, READ_WORD(&cave_vctrl_0[2]) );	if (tilemap_1)	{		tilemap_set_enable( tilemap_1, READ_WORD(&cave_vctrl_1[4]) & 1 );		tilemap_set_scrollx(tilemap_1, 0, READ_WORD(&cave_vctrl_1[0]) );		tilemap_set_scrolly(tilemap_1, 0, READ_WORD(&cave_vctrl_1[2]) );	}	if (tilemap_2)	{		tilemap_set_enable( tilemap_2, READ_WORD(&cave_vctrl_2[4]) & 1 );		tilemap_set_scrollx(tilemap_2, 0, READ_WORD(&cave_vctrl_2[0]) );		tilemap_set_scrolly(tilemap_2, 0, READ_WORD(&cave_vctrl_2[2]) );	}	tilemap_update(ALL_TILEMAPS);	palette_init_used_colors();	get_sprite_info();	sprite_update();	if (palette_recalc())	tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);	tilemap_render(ALL_TILEMAPS);	/* Clear the background if at least one of layer 0's tile priorities	   is lacking */	if ((layers_ctrl & 0xf) != 0xf)	osd_clearbitmap(Machine->scrbitmap);	/* Pen 0 of layer 0's tiles (any priority) goes below anything else */	for ( pri = 0; pri < 4; pri++ )		if ((layers_ctrl&(1<<(pri+0)))&&tilemap_0)	tilemap_draw(bitmap, tilemap_0, TILEMAP_IGNORE_TRANSPARENCY | pri);	/* Draw the rest with transparency */	for ( pri = 0; pri < 4; pri++ )	{		if ((layers_ctrl&(1<<(pri+12))))			sprite_draw(sprite_list, pri);		if ((layers_ctrl&(1<<(pri+0)))&&tilemap_0)	tilemap_draw(bitmap, tilemap_0, pri);		if ((layers_ctrl&(1<<(pri+4)))&&tilemap_1)	tilemap_draw(bitmap, tilemap_1, pri);		if ((layers_ctrl&(1<<(pri+8)))&&tilemap_2)	tilemap_draw(bitmap, tilemap_2, pri);	}}

static VIDEO_UPDATE( good ){    good_state *state = (good_state *)screen->machine->driver_data;    tilemap_draw(bitmap, cliprect, state->bg_tilemap, 0, 0);    tilemap_draw(bitmap, cliprect, state->fg_tilemap, 0, 0);    return 0;}

void stfight_vh_screenrefresh( struct osd_bitmap *bitmap,int full_refresh ){	tilemap_update(ALL_TILEMAPS);	if (palette_recalc())		tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);	tilemap_render(ALL_TILEMAPS);	fillbitmap(priority_bitmap,0,NULL);	if (bg_tilemap->enable)	    tilemap_draw(bitmap,bg_tilemap,0);	else		fillbitmap(bitmap,Machine->pens[0],&Machine->visible_area);	tilemap_draw(bitmap,fg_tilemap,1<<16);	/* Draw sprites (may be obscured by foreground layer) */	if (stfight_vh_latch_ram[0x07] & 0x40)		draw_sprites(bitmap);	tilemap_draw(bitmap,tx_tilemap,0);}

static VIDEO_UPDATE( dunhuang ){	int layers_ctrl = -1;#if DUNHUANG_DEBUGif (input_code_pressed(KEYCODE_Z)){	int msk = 0;	if (input_code_pressed(KEYCODE_Q))	msk |= 1;	if (input_code_pressed(KEYCODE_W))	msk |= 2;	if (msk != 0) layers_ctrl &= msk;}#endif	fillbitmap(bitmap,get_black_pen(screen->machine),cliprect);	switch (dunhuang_layers)	{		case 0x04:	// girl select: bg over fg			if (layers_ctrl & 2)	tilemap_draw(bitmap,cliprect, tmap2, TILEMAP_DRAW_OPAQUE, 0);			if (layers_ctrl & 1)	tilemap_draw(bitmap,cliprect, tmap,  0, 0);			break;		case 0x05:	// dips: must hide fg			if (layers_ctrl & 1)	tilemap_draw(bitmap,cliprect, tmap,  TILEMAP_DRAW_OPAQUE, 0);			break;		case 0x07:	// game,demo: fg over bg		default:			if (layers_ctrl & 1)	tilemap_draw(bitmap,cliprect, tmap,  TILEMAP_DRAW_OPAQUE, 0);			if (layers_ctrl & 2)	tilemap_draw(bitmap,cliprect, tmap2, 0, 0);			break;	}	return 0;}

static VIDEO_UPDATE( pkscramble ){	tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);	tilemap_draw(bitmap,cliprect,md_tilemap,0,0);	tilemap_draw(bitmap,cliprect,fg_tilemap,0,0);	return 0;}

void raiden_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh){	int color,offs,sprite;	int colmask[16],i,pal_base;	/* Setup the tilemaps, alternate version has different scroll positions */	if (!ALTERNATE) {		tilemap_set_scrollx( background_layer,0, ((raiden_scroll_ram[1]<<8)+raiden_scroll_ram[0]) );		tilemap_set_scrolly( background_layer,0, ((raiden_scroll_ram[3]<<8)+raiden_scroll_ram[2]) );		tilemap_set_scrollx( foreground_layer,0, ((raiden_scroll_ram[5]<<8)+raiden_scroll_ram[4]) );		tilemap_set_scrolly( foreground_layer,0, ((raiden_scroll_ram[7]<<8)+raiden_scroll_ram[6]) );	}	else {		tilemap_set_scrolly( background_layer,0, ((raiden_scroll_ram[0x02]&0x30)<<4)+((raiden_scroll_ram[0x04]&0x7f)<<1)+((raiden_scroll_ram[0x04]&0x80)>>7) );		tilemap_set_scrollx( background_layer,0, ((raiden_scroll_ram[0x12]&0x30)<<4)+((raiden_scroll_ram[0x14]&0x7f)<<1)+((raiden_scroll_ram[0x14]&0x80)>>7) );		tilemap_set_scrolly( foreground_layer,0, ((raiden_scroll_ram[0x22]&0x30)<<4)+((raiden_scroll_ram[0x24]&0x7f)<<1)+((raiden_scroll_ram[0x24]&0x80)>>7) );		tilemap_set_scrollx( foreground_layer,0, ((raiden_scroll_ram[0x32]&0x30)<<4)+((raiden_scroll_ram[0x34]&0x7f)<<1)+((raiden_scroll_ram[0x34]&0x80)>>7) );	}	tilemap_update(ALL_TILEMAPS);	/* Build the dynamic palette */	palette_init_used_colors();	/* Sprites */	pal_base = Machine->drv->gfxdecodeinfo[3].color_codes_start;	for (color = 0;color < 16;color++) colmask[color] = 0;	for (offs = 0;offs <0x1000;offs += 8)	{		color = buffered_spriteram[offs+1]&0xf;		sprite = buffered_spriteram[offs+2]+(buffered_spriteram[offs+3]<<8);		sprite &= 0x0fff;		colmask[color] |= Machine->gfx[3]->pen_usage[sprite];	}	for (color = 0;color < 16;color++)	{		for (i = 0;i < 15;i++)		{			if (colmask[color] & (1 << i))				palette_used_colors[pal_base + 16 * color + i] = PALETTE_COLOR_USED;		}	}	if (palette_recalc())		tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);	tilemap_render(ALL_TILEMAPS);	tilemap_draw(bitmap,background_layer,0);	/* Draw sprites underneath foreground */	draw_sprites(bitmap,0x40);	tilemap_draw(bitmap,foreground_layer,0);	/* Rest of sprites */	draw_sprites(bitmap,0x80);	/* Text layer */	tilemap_draw(bitmap,text_layer,0);}

static VIDEO_UPDATE(mil4000){    tilemap_draw(bitmap,cliprect,sc0_tilemap,0,0);    tilemap_draw(bitmap,cliprect,sc1_tilemap,0,0);    tilemap_draw(bitmap,cliprect,sc2_tilemap,0,0);    tilemap_draw(bitmap,cliprect,sc3_tilemap,0,0);    return 0;}

static SCREEN_UPDATE(dacholer){	dacholer_state *state = screen->machine().driver_data<dacholer_state>();	tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);	tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);	draw_sprites(screen->machine(), bitmap, cliprect);	return 0;}

static VIDEO_UPDATE(dacholer){	dacholer_state *state = (dacholer_state *)screen->machine->driver_data;	tilemap_draw(bitmap, cliprect, state->bg_tilemap, 0, 0);	tilemap_draw(bitmap, cliprect, state->fg_tilemap, 0, 0);	draw_sprites(screen->machine, bitmap, cliprect);	return 0;}

static VIDEO_UPDATE( dynadice ){	rectangle myclip=*cliprect;	myclip.max_x=15;	tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);	tilemap_draw(bitmap,&myclip,top_tilemap,0,0);	return 0;}

static SCREEN_UPDATE(mil4000){	mil4000_state *state = screen->machine().driver_data<mil4000_state>();	tilemap_draw(bitmap,cliprect,state->m_sc0_tilemap,0,0);	tilemap_draw(bitmap,cliprect,state->m_sc1_tilemap,0,0);	tilemap_draw(bitmap,cliprect,state->m_sc2_tilemap,0,0);	tilemap_draw(bitmap,cliprect,state->m_sc3_tilemap,0,0);	return 0;}

static VIDEO_UPDATE( chanbara ){	chanbara_state *state = screen->machine->driver_data<chanbara_state>();	tilemap_set_scrolly(state->bg2_tilemap, 0, state->scroll | (state->scrollhi << 8));	tilemap_draw(bitmap, cliprect, state->bg2_tilemap, 0, 0);	draw_sprites(screen->machine, bitmap, cliprect);	tilemap_draw(bitmap, cliprect, state->bg_tilemap, 0, 0);	return 0;}

static VIDEO_UPDATE(cabaret){	bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine));	tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);	tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 0);	return 0;}

static SCREEN_UPDATE(cabaret){	cabaret_state *state = screen->machine().driver_data<cabaret_state>();	bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine()));	tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);	tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);	return 0;}

static VIDEO_UPDATE( panicr){    bitmap_fill(bitmap,cliprect,get_black_pen(screen->machine));    tilemap_mark_all_tiles_dirty( txttilemap );    tilemap_set_scrollx( bgtilemap,0, ((scrollram[0x02]&0x0f)<<12)+((scrollram[0x02]&0xf0)<<4)+((scrollram[0x04]&0x7f)<<1)+((scrollram[0x04]&0x80)>>7) );    tilemap_draw(bitmap,cliprect,bgtilemap,0,0);    draw_sprites(screen->machine,bitmap,cliprect);    tilemap_draw(bitmap,cliprect,txttilemap,0,0);    return 0;}

static SCREEN_UPDATE( calorie ){	calorie_state *state = screen->machine().driver_data<calorie_state>();	int x;	if (state->m_bg_bank & 0x10)	{		tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);		tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);	}	else	{		tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, TILEMAP_DRAW_OPAQUE, 0);	}	for (x = 0x400; x >= 0; x -= 4)	{		int xpos, ypos, tileno, color, flipx, flipy;		tileno = state->m_sprites[x + 0];		color = state->m_sprites[x + 1] & 0x0f;		flipx = state->m_sprites[x + 1] & 0x40;		flipy = 0;		ypos = 0xff - state->m_sprites[x + 2];		xpos = state->m_sprites[x + 3];		if (flip_screen_get(screen->machine()))		{			if (state->m_sprites[x + 1] & 0x10)				ypos = 0xff - ypos + 32;			else				ypos = 0xff - ypos + 16;			xpos = 0xff - xpos - 16;			flipx = !flipx;			flipy = !flipy;		}		if (state->m_sprites[x + 1] & 0x10)		{			 /* 32x32 sprites */			drawgfx_transpen(bitmap, cliprect, screen->machine().gfx[3], tileno | 0x40, color, flipx, flipy, xpos, ypos - 31, 0);		}		else		{			/* 16x16 sprites */			drawgfx_transpen(bitmap, cliprect, screen->machine().gfx[2], tileno, color, flipx, flipy, xpos, ypos - 15, 0);		}	}	return 0;}

void gundealr_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh){	tilemap_update(ALL_TILEMAPS);	palette_init_used_colors();	if (palette_recalc())		tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);	tilemap_render(ALL_TILEMAPS);	tilemap_draw(bitmap,bg_tilemap,0);	tilemap_draw(bitmap,fg_tilemap,0);}

static VIDEO_UPDATE( calorie ){	int x;	if (calorie_bg & 0x10)	{		tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);		tilemap_draw(bitmap,cliprect,fg_tilemap,0,0);	}	else	{		tilemap_draw(bitmap,cliprect,fg_tilemap,TILEMAP_DRAW_OPAQUE,0);	}	for (x = 0x400; x >= 0; x -= 4)	{		int xpos, ypos, tileno, color, flipx, flipy;		tileno = calorie_sprites[x+0];		color = calorie_sprites[x+1] & 0x0f;		flipx = calorie_sprites[x+1] & 0x40;		flipy = 0;		ypos = 0xff - calorie_sprites[x+2];		xpos = calorie_sprites[x+3];		if(flip_screen_get(screen->machine))		{			if( calorie_sprites[x+1] & 0x10 )				ypos = 0xff - ypos + 32;			else				ypos = 0xff - ypos + 16;			xpos = 0xff - xpos - 16;			flipx = !flipx;			flipy = !flipy;		}		if( calorie_sprites[x+1] & 0x10 )		{			 /* 32x32 sprites */			drawgfx_transpen(bitmap,cliprect,screen->machine->gfx[3],tileno | 0x40,color,flipx,flipy,xpos,ypos - 31,0);		}		else		{			/* 16x16 sprites */			drawgfx_transpen(bitmap,cliprect,screen->machine->gfx[2],tileno,color,flipx,flipy,xpos,ypos - 15,0);		}	}	return 0;}

void maniacsq_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh){	/* set scroll registers */	tilemap_set_scrolly(pant[0], 0, READ_WORD(&gaelco_vregs[0]));	tilemap_set_scrollx(pant[0], 0, READ_WORD(&gaelco_vregs[2])+4);	tilemap_set_scrolly(pant[1], 0, READ_WORD(&gaelco_vregs[4]));	tilemap_set_scrollx(pant[1], 0, READ_WORD(&gaelco_vregs[6]));	tilemap_update(ALL_TILEMAPS);	gaelco_sort_sprites();	if (palette_recalc())		tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);	tilemap_render(ALL_TILEMAPS);	fillbitmap( bitmap, Machine->pens[0], &Machine->visible_area );	tilemap_draw(bitmap,pant[1],3);	tilemap_draw(bitmap,pant[0],3);	gaelco_draw_sprites(bitmap,3);	tilemap_draw(bitmap,pant[1],2);	tilemap_draw(bitmap,pant[0],2);	gaelco_draw_sprites(bitmap,2);	tilemap_draw(bitmap,pant[1],1);	tilemap_draw(bitmap,pant[0],1);	gaelco_draw_sprites(bitmap,1);	tilemap_draw(bitmap,pant[1],0);	tilemap_draw(bitmap,pant[0],0);	gaelco_draw_sprites(bitmap,0);}

void maniacsq_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh){	/* set scroll registers */	tilemap_set_scrolly(pant[0], 0, gaelco_vregs[0]);	tilemap_set_scrollx(pant[0], 0, gaelco_vregs[1]+4);	tilemap_set_scrolly(pant[1], 0, gaelco_vregs[2]);	tilemap_set_scrollx(pant[1], 0, gaelco_vregs[3]);	tilemap_update(ALL_TILEMAPS);	gaelco_sort_sprites();	palette_recalc();	fillbitmap( bitmap, Machine->pens[0], &Machine->visible_area );	tilemap_draw(bitmap,pant[1],3,0);	tilemap_draw(bitmap,pant[0],3,0);	gaelco_draw_sprites(bitmap,3);	tilemap_draw(bitmap,pant[1],2,0);	tilemap_draw(bitmap,pant[0],2,0);	gaelco_draw_sprites(bitmap,2);	tilemap_draw(bitmap,pant[1],1,0);	tilemap_draw(bitmap,pant[0],1,0);	gaelco_draw_sprites(bitmap,1);	tilemap_draw(bitmap,pant[1],0,0);	tilemap_draw(bitmap,pant[0],0,0);	gaelco_draw_sprites(bitmap,0);}

static VIDEO_UPDATE(bestleag){	tilemap_set_scrollx(bg_tilemap,0,(bestleag_vregs[0x00/2] & 0xfff) + (bestleag_vregs[0x08/2] & 0x7) - 3);	tilemap_set_scrolly(bg_tilemap,0,bestleag_vregs[0x02/2]);	tilemap_set_scrollx(tx_tilemap,0,bestleag_vregs[0x04/2]);	tilemap_set_scrolly(tx_tilemap,0,bestleag_vregs[0x06/2]);	tilemap_set_scrollx(fg_tilemap,0,bestleag_vregs[0x08/2] & 0xfff8);	tilemap_set_scrolly(fg_tilemap,0,bestleag_vregs[0x0a/2]);	tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);	tilemap_draw(bitmap,cliprect,fg_tilemap,0,0);	draw_sprites(screen->machine,bitmap,cliprect);	tilemap_draw(bitmap,cliprect,tx_tilemap,0,0);	return 0;}