/***************************************************************************
circus.c video
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "sound/samples.h"
#include "includes/circus.h"
WRITE8_HANDLER( circus_videoram_w )
{
circus_state *state = space->machine().driver_data<circus_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
WRITE8_HANDLER( circus_clown_x_w )
{
circus_state *state = space->machine().driver_data<circus_state>();
state->m_clown_x = 240 - data;
}
WRITE8_HANDLER( circus_clown_y_w )
{
circus_state *state = space->machine().driver_data<circus_state>();
state->m_clown_y = 240 - data;
}
static TILE_GET_INFO( get_bg_tile_info )
{
circus_state *state = machine.driver_data<circus_state>();
int code = state->m_videoram[tile_index];
SET_TILE_INFO(0, code, 0, 0);
}
VIDEO_START( circus )
{
circus_state *state = machine.driver_data<circus_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows, 8, 8, 32, 32);
}
static void draw_line( bitmap_t *bitmap, const rectangle *cliprect, int x1, int y1, int x2, int y2, int dotted )
{
/* Draws horizontal and Vertical lines only! */
int count, skip;
/* Draw the Line */
if (dotted > 0)
skip = 2;
else
skip = 1;
if (x1 == x2)
for (count = y2; count >= y1; count -= skip)
*BITMAP_ADDR16(bitmap, count, x1) = 1;
else
for (count = x2; count >= x1; count -= skip)
*BITMAP_ADDR16(bitmap, y1, count) = 1;
}
static void draw_sprite_collision( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
circus_state *state = machine.driver_data<circus_state>();
const gfx_element *sprite_gfx = machine.gfx[1];
const UINT8 *sprite_data = gfx_element_get_data(sprite_gfx, state->m_clown_z);
int sx, sy, dx, dy;
int pixel, collision = 0;
// draw sprite and check collision on a pixel basis
for (sy = 0; sy < 16; sy++)
{
dy = state->m_clown_x + sy-1;
if (dy>=0 && dy<bitmap->height)
{
for (sx = 0; sx < 16; sx++)
{
dx = state->m_clown_y + sx;
if (dx>=0 && dx<bitmap->width)
{
pixel = sprite_data[sy * sprite_gfx->line_modulo + sx];
if (pixel)
{
collision |= *BITMAP_ADDR16(bitmap, dy, dx);
*BITMAP_ADDR16(bitmap, dy, dx) = machine.pens[pixel];
}
}
}
}
}
if (collision)
device_set_input_line(state->m_maincpu, 0, ASSERT_LINE);
}
static void circus_draw_fg( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
/* The sync generator hardware is used to */
/* draw the border and diving boards */
draw_line(bitmap, cliprect, 0, 18, 255, 18, 0);
draw_line(bitmap, cliprect, 0, 249, 255, 249, 1);
draw_line(bitmap, cliprect, 0, 18, 0, 248, 0);
draw_line(bitmap, cliprect, 247, 18, 247, 248, 0);
draw_line(bitmap, cliprect, 0, 136, 17, 136, 0);
draw_line(bitmap, cliprect, 231, 136, 248, 136, 0);
draw_line(bitmap, cliprect, 0, 192, 17, 192, 0);
draw_line(bitmap, cliprect, 231, 192, 248, 192, 0);
}
SCREEN_UPDATE( circus )
{
circus_state *state = screen->machine().driver_data<circus_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
circus_draw_fg(screen->machine(), bitmap, cliprect);
draw_sprite_collision(screen->machine(), bitmap, cliprect);
return 0;
}
static void robotbwl_draw_box( bitmap_t *bitmap, const rectangle *cliprect, int x, int y )
{
/* Box */
int ex = x + 24;
int ey = y + 26;
draw_line(bitmap, cliprect, x, y, ex, y, 0); /* Top */
draw_line(bitmap, cliprect, x, ey, ex, ey, 0); /* Bottom */
draw_line(bitmap, cliprect, x, y, x, ey, 0); /* Left */
draw_line(bitmap, cliprect, ex, y, ex, ey, 0); /* Right */
/* Score Grid */
ey = y + 10;
draw_line(bitmap, cliprect, x + 8, ey, ex, ey, 0); /* Horizontal Divide Line */
draw_line(bitmap, cliprect, x + 8, y, x + 8, ey, 0);
draw_line(bitmap, cliprect, x + 16, y, x + 16, ey, 0);
}
static void robotbwl_draw_scoreboard( bitmap_t *bitmap, const rectangle *cliprect )
{
int offs;
/* The sync generator hardware is used to */
/* draw the bowling alley & scorecards */
for (offs = 15; offs <= 63; offs += 24)
{
robotbwl_draw_box(bitmap, cliprect, offs, 31);
robotbwl_draw_box(bitmap, cliprect, offs, 63);
robotbwl_draw_box(bitmap, cliprect, offs, 95);
robotbwl_draw_box(bitmap, cliprect, offs + 152, 31);
robotbwl_draw_box(bitmap, cliprect, offs + 152, 63);
robotbwl_draw_box(bitmap, cliprect, offs + 152, 95);
}
robotbwl_draw_box(bitmap, cliprect, 39, 127); /* 10th Frame */
draw_line(bitmap, cliprect, 39, 137, 47, 137, 0); /* Extra digit box */
robotbwl_draw_box(bitmap, cliprect, 39 + 152, 127);
draw_line(bitmap, cliprect, 39 + 152, 137, 47 + 152, 137, 0);
}
static void robotbwl_draw_bowling_alley( bitmap_t *bitmap, const rectangle *cliprect )
{
draw_line(bitmap, cliprect, 103, 17, 103, 205, 0);
draw_line(bitmap, cliprect, 111, 17, 111, 203, 1);
draw_line(bitmap, cliprect, 152, 17, 152, 205, 0);
draw_line(bitmap, cliprect, 144, 17, 144, 203, 1);
}
static void robotbwl_draw_ball( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
circus_state *state = machine.driver_data<circus_state>();
drawgfx_transpen(bitmap,/* Y is horizontal position */
cliprect,machine.gfx[1],
state->m_clown_z,
0,
0,0,
state->m_clown_y + 8, state->m_clown_x + 8, 0);
}
SCREEN_UPDATE( robotbwl )
{
circus_state *state = screen->machine().driver_data<circus_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
robotbwl_draw_scoreboard(bitmap, cliprect);
robotbwl_draw_bowling_alley(bitmap, cliprect);
robotbwl_draw_ball(screen->machine(), bitmap, cliprect);
return 0;
}
static void crash_draw_car( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
circus_state *state = machine.driver_data<circus_state>();
drawgfx_transpen(bitmap,/* Y is horizontal position */
cliprect,machine.gfx[1],
state->m_clown_z,
0,
0,0,
state->m_clown_y, state->m_clown_x - 1, 0);
}
SCREEN_UPDATE( crash )
{
circus_state *state = screen->machine().driver_data<circus_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
crash_draw_car(screen->machine(), bitmap, cliprect);
return 0;
}
SCREEN_UPDATE( ripcord )
{
circus_state *state = screen->machine().driver_data<circus_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
draw_sprite_collision(screen->machine(), bitmap, cliprect);
return 0;
}