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Viewing changes to mess/src/mame/video/targeth.c

  • Committer: Package Import Robot
  • Author(s): Jordi Mallach, Jordi Mallach, Emmanuel Kasper
  • Date: 2011-12-19 22:56:27 UTC
  • mfrom: (0.1.2)
  • Revision ID: package-import@ubuntu.com-20111219225627-ub5oga1oys4ogqzm
Tags: 0.144-1
http://bugs.debian.org/651538
[ Jordi Mallach ]
* Fix syntax errors in DEP5 copyright file (lintian).
* Use a versioned copyright Format specification field.
* Update Vcs-* URLs.
* Move transitional packages to the new metapackages section, and make
  them priority extra.
* Remove references to GNU/Linux and MESS sources from copyright.
* Add build variables for s390x.
* Use .xz tarballs as it cuts 4MB for the upstream sources.
* Add nplayers.ini as a patch. Update copyright file to add CC-BY-SA-3.0.

[ Emmanuel Kasper ]
* New upstream release. Closes: #651538.
* Add Free Desktop compliant png icons of various sizes taken from
  the hydroxygen iconset
* Mess is now built from a new source package, to avoid possible source
  incompatibilities between mame and the mess overlay.
* Mame-tools are not built from the mame source package anymore, but
  from the mess source package

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mess/src/mame/video/targeth.c
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/***************************************************************************
2
 
 
3
 
  Target Hits Video Hardware
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5
 
  Functions to emulate the video hardware of the machine
6
 
 
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***************************************************************************/
8
 
 
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#include "emu.h"
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#include "includes/targeth.h"
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/***************************************************************************
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    Callbacks for the TileMap code
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***************************************************************************/
18
 
 
19
 
/*
20
 
    Tile format
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    -----------
22
 
 
23
 
    Screen 0 & 1: (64*32, 16x16 tiles)
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    Word | Bit(s)            | Description
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    -----+-FEDCBA98-76543210-+--------------------------
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      0  | --xxxxxx xxxxxxxx | code
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      0  | xx------ -------- | not used?
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      1  | -------- ---xxxxx | color (uses 1st half of the palette)
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      1  | -------- --x----- | flip y
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      1  | -------- -x------ | flip x
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      1  | xxxxxxxx x------- | not used?
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*/
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static TILE_GET_INFO( get_tile_info_targeth_screen0 )
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{
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        targeth_state *state = machine.driver_data<targeth_state>();
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        int data = state->m_videoram[tile_index << 1];
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        int data2 = state->m_videoram[(tile_index << 1) + 1];
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        int code = data & 0x3fff;
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        SET_TILE_INFO(0, code, data2 & 0x1f, TILE_FLIPXY((data2 >> 5) & 0x03));
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}
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static TILE_GET_INFO( get_tile_info_targeth_screen1 )
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{
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        targeth_state *state = machine.driver_data<targeth_state>();
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        int data = state->m_videoram[(0x2000/2) + (tile_index << 1)];
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        int data2 = state->m_videoram[(0x2000/2) + (tile_index << 1) + 1];
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        int code = data & 0x3fff;
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        SET_TILE_INFO(0, code, data2 & 0x1f, TILE_FLIPXY((data2 >> 5) & 0x03));
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}
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/***************************************************************************
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    Memory Handlers
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***************************************************************************/
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WRITE16_HANDLER( targeth_vram_w )
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{
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        targeth_state *state = space->machine().driver_data<targeth_state>();
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        state->m_videoram[offset] = data;
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        tilemap_mark_tile_dirty(state->m_pant[(offset & 0x1fff) >> 12], ((offset << 1) & 0x1fff) >> 2);
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}
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/***************************************************************************
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    Start/Stop the video hardware emulation.
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***************************************************************************/
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VIDEO_START( targeth )
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{
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        targeth_state *state = machine.driver_data<targeth_state>();
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        state->m_pant[0] = tilemap_create(machine, get_tile_info_targeth_screen0,tilemap_scan_rows,16,16,64,32);
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        state->m_pant[1] = tilemap_create(machine, get_tile_info_targeth_screen1,tilemap_scan_rows,16,16,64,32);
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        tilemap_set_transparent_pen(state->m_pant[0],0);
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}
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/***************************************************************************
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    Sprites
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***************************************************************************/
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/*
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    Sprite Format
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    -------------
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    Word | Bit(s)            | Description
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    -----+-FEDCBA98-76543210-+--------------------------
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      0  | -------- xxxxxxxx | y position
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      0  | --xxxxxx -------- | not used?
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      0  | -x------ -------- | flipx
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      0  | x------- -------- | flipy
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      1  | xxxxxxxx xxxxxxxx | not used?
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      2  | ------xx xxxxxxxx | x position
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      2  | -xxxxx-- -------- | sprite color (uses 2nd half of the palette)
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      3  | --xxxxxx xxxxxxxx | sprite code
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      3  | xx------ -------- | not used?
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*/
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static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
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{
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        targeth_state *state = machine.driver_data<targeth_state>();
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        int i;
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        const gfx_element *gfx = machine.gfx[0];
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        for (i = 3; i < (0x1000 - 6)/2; i += 4){
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                int sx = state->m_spriteram[i+2] & 0x03ff;
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                int sy = (240 - (state->m_spriteram[i] & 0x00ff)) & 0x00ff;
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                int number = state->m_spriteram[i+3] & 0x3fff;
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                int color = (state->m_spriteram[i+2] & 0x7c00) >> 10;
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                int attr = (state->m_spriteram[i] & 0xfe00) >> 9;
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                int xflip = attr & 0x20;
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                int yflip = attr & 0x40;
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                drawgfx_transpen(bitmap,cliprect,gfx,number,
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                                0x20 + color,xflip,yflip,
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                                sx - 0x0f,sy,0);
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        }
128
 
}
129
 
 
130
 
/***************************************************************************
131
 
 
132
 
    Display Refresh
133
 
 
134
 
***************************************************************************/
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SCREEN_UPDATE( targeth )
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{
138
 
        targeth_state *state = screen->machine().driver_data<targeth_state>();
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        /* set scroll registers */
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        tilemap_set_scrolly(state->m_pant[0], 0, state->m_vregs[0]);
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        tilemap_set_scrollx(state->m_pant[0], 0, state->m_vregs[1] + 0x04);
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        tilemap_set_scrolly(state->m_pant[1], 0, state->m_vregs[2]);
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        tilemap_set_scrollx(state->m_pant[1], 0, state->m_vregs[3]);
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        tilemap_draw(bitmap,cliprect,state->m_pant[1],0,0);
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        tilemap_draw(bitmap,cliprect,state->m_pant[0],0,0);
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        draw_sprites(screen->machine(), bitmap,cliprect);
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        return 0;
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}