#include "emu.h" #include "includes/welltris.h" #ifdef UNUSED_FUNCTION READ16_HANDLER( welltris_spriteram_r ) { return welltris_spriteram[offset]; } #endif WRITE16_HANDLER( welltris_spriteram_w ) { welltris_state *state = space->machine().driver_data(); int offs; COMBINE_DATA(&state->m_spriteram[offset]); /* hack... sprite doesn't work otherwise (quiz18kn) */ if ((offset == 0x1fe) && (state->m_spriteram[0x01fc] == 0x0000) && (state->m_spriteram[0x01fd] == 0x0000) && (state->m_spriteram[0x01ff] == 0x0000)) { for (offs = 0; offs < 0x1fc; offs++) state->m_spriteram[offs] = 0x0000; } } /* Sprite Drawing is pretty much the same as fromance.c */ static void draw_sprites(running_machine &machine, bitmap_t *bitmap,const rectangle *cliprect) { static const UINT8 zoomtable[16] = { 0,7,14,20,25,30,34,38,42,46,49,52,54,57,59,61 }; welltris_state *state = machine.driver_data(); int offs; const rectangle &visarea = machine.primary_screen->visible_area(); /* draw the sprites */ for (offs = 0; offs < 0x200 - 4; offs += 4) { int data0 = state->m_spriteram[offs + 0]; int data1 = state->m_spriteram[offs + 1]; int data2 = state->m_spriteram[offs + 2]; int data3 = state->m_spriteram[offs + 3]; int code = data3 & 0x1fff; int color = (data2 & 0x0f) + (0x10 * state->m_spritepalettebank); int y = (data0 & 0x1ff) + 1; int x = (data1 & 0x1ff) + 6; int yzoom = (data0 >> 12) & 15; int xzoom = (data1 >> 12) & 15; int zoomed = (xzoom | yzoom); int ytiles = ((data2 >> 12) & 7) + 1; int xtiles = ((data2 >> 8) & 7) + 1; int yflip = (data2 >> 15) & 1; int xflip = (data2 >> 11) & 1; int xt, yt; if (!(state->m_spriteram[offs + 2] & 0x0080)) continue; /* compute the zoom factor -- stolen from aerofgt.c */ xzoom = 16 - zoomtable[xzoom] / 8; yzoom = 16 - zoomtable[yzoom] / 8; /* wrap around */ if (x > visarea.max_x) x -= 0x200; if (y > visarea.max_y) y -= 0x200; /* normal case */ if (!xflip && !yflip) { for (yt = 0; yt < ytiles; yt++) { for (xt = 0; xt < xtiles; xt++, code++) { if (!zoomed) drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, 0, 0, x + xt * 16, y + yt * 16, 15); else drawgfxzoom_transpen(bitmap, cliprect, machine.gfx[1], code, color, 0, 0, x + xt * xzoom, y + yt * yzoom, 0x1000 * xzoom, 0x1000 * yzoom, 15); } if (xtiles == 3) code += 1; if (xtiles == 5) code += 3; if (xtiles == 6) code += 2; if (xtiles == 7) code += 1; } } /* xflipped case */ else if (xflip && !yflip) { for (yt = 0; yt < ytiles; yt++) { for (xt = 0; xt < xtiles; xt++, code++) { if (!zoomed) drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, 1, 0, x + (xtiles - 1 - xt) * 16, y + yt * 16, 15); else drawgfxzoom_transpen(bitmap, cliprect, machine.gfx[1], code, color, 1, 0, x + (xtiles - 1 - xt) * xzoom, y + yt * yzoom, 0x1000 * xzoom, 0x1000 * yzoom, 15); } if (xtiles == 3) code += 1; if (xtiles == 5) code += 3; if (xtiles == 6) code += 2; if (xtiles == 7) code += 1; } } /* yflipped case */ else if (!xflip && yflip) { for (yt = 0; yt < ytiles; yt++) { for (xt = 0; xt < xtiles; xt++, code++) { if (!zoomed) drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, 0, 1, x + xt * 16, y + (ytiles - 1 - yt) * 16, 15); else drawgfxzoom_transpen(bitmap, cliprect, machine.gfx[1], code, color, 0, 1, x + xt * xzoom, y + (ytiles - 1 - yt) * yzoom, 0x1000 * xzoom, 0x1000 * yzoom, 15); } if (xtiles == 3) code += 1; if (xtiles == 5) code += 3; if (xtiles == 6) code += 2; if (xtiles == 7) code += 1; } } /* x & yflipped case */ else { for (yt = 0; yt < ytiles; yt++) { for (xt = 0; xt < xtiles; xt++, code++) { if (!zoomed) drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, 1, 1, x + (xtiles - 1 - xt) * 16, y + (ytiles - 1 - yt) * 16, 15); else drawgfxzoom_transpen(bitmap, cliprect, machine.gfx[1], code, color, 1, 1, x + (xtiles - 1 - xt) * xzoom, y + (ytiles - 1 - yt) * yzoom, 0x1000 * xzoom, 0x1000 * yzoom, 15); } if (xtiles == 3) code += 1; if (xtiles == 5) code += 3; if (xtiles == 6) code += 2; if (xtiles == 7) code += 1; } } } } static void setbank(welltris_state *state, int num, int bank) { if (state->m_gfxbank[num] != bank) { state->m_gfxbank[num] = bank; tilemap_mark_all_tiles_dirty(state->m_char_tilemap); } } /* Not really enough evidence here */ WRITE16_HANDLER( welltris_palette_bank_w ) { if (ACCESSING_BITS_0_7) { welltris_state *state = space->machine().driver_data(); if (state->m_charpalettebank != (data & 0x03)) { state->m_charpalettebank = (data & 0x03); tilemap_mark_all_tiles_dirty(state->m_char_tilemap); } flip_screen_set(space->machine(), data & 0x80); state->m_spritepalettebank = (data & 0x20) >> 5; state->m_pixelpalettebank = (data & 0x08) >> 3; } } WRITE16_HANDLER( welltris_gfxbank_w ) { if (ACCESSING_BITS_0_7) { welltris_state *state = space->machine().driver_data(); setbank(state, 0, (data & 0xf0) >> 4); setbank(state, 1, data & 0x0f); } } WRITE16_HANDLER( welltris_scrollreg_w ) { welltris_state *state = space->machine().driver_data(); switch (offset) { case 0: state->m_scrollx = data - 14; break; case 1: state->m_scrolly = data + 0; break; } } static TILE_GET_INFO( get_welltris_tile_info ) { welltris_state *state = machine.driver_data(); UINT16 code = state->m_charvideoram[tile_index]; int bank = (code & 0x1000) >> 12; SET_TILE_INFO( 0, (code & 0x0fff) + (state->m_gfxbank[bank] << 12), ((code & 0xe000) >> 13) + (8 * state->m_charpalettebank), 0); } WRITE16_HANDLER( welltris_charvideoram_w ) { welltris_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_charvideoram[offset]); tilemap_mark_tile_dirty(state->m_char_tilemap, offset); } VIDEO_START( welltris ) { welltris_state *state = machine.driver_data(); state->m_char_tilemap = tilemap_create(machine, get_welltris_tile_info, tilemap_scan_rows, 8, 8, 64, 32); tilemap_set_transparent_pen(state->m_char_tilemap, 15); } static void draw_background(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect) { welltris_state *state = machine.driver_data(); int x, y; int pixdata; for (y = 0; y < 256; y++) { for (x = 0; x < 512 / 2; x++) { pixdata = state->m_pixelram[(x & 0xff) + (y & 0xff) * 256]; *BITMAP_ADDR16(bitmap, y, (x * 2) + 0) = (pixdata >> 8) + (0x100 * state->m_pixelpalettebank) + 0x400; *BITMAP_ADDR16(bitmap, y, (x * 2) + 1) = (pixdata & 0xff) + (0x100 * state->m_pixelpalettebank) + 0x400; } } } SCREEN_UPDATE( welltris ) { welltris_state *state = screen->machine().driver_data(); tilemap_set_scrollx(state->m_char_tilemap, 0, state->m_scrollx); tilemap_set_scrolly(state->m_char_tilemap, 0, state->m_scrolly); draw_background(screen->machine(), bitmap, cliprect); tilemap_draw(bitmap, cliprect, state->m_char_tilemap, 0, 0); draw_sprites(screen->machine(), bitmap, cliprect); return 0; }