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tatsumi.cpp: invert shadow product when a specific register is enabled, used by Big Fight when player fights against Chen to simulate disco strobe lights [Angelo Salese]

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This commit is contained in:
angelosa 2018-06-07 01:53:28 +02:00
parent 1f7a89052c
commit c4a007dd23
4 changed files with 28 additions and 21 deletions
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10
src/mame/drivers/tatsumi.cpp
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@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
// copyright-holders:Bryan McPhail, Angelo Salese
/***************************************************************************
Apache 3 ATF-011
@ -195,12 +195,6 @@ WRITE16_MEMBER(cyclwarr_state::bigfight_a40000_w)
COMBINE_DATA(&m_bigfight_a40000[offset]);
}
WRITE16_MEMBER(cyclwarr_state::bigfight_a60000_w)
{
COMBINE_DATA(&m_bigfight_a60000[offset]);
// popmessage("%04x",m_bigfight_a60000[offset]);
}
template<int Bank>
READ16_MEMBER(cyclwarr_state::cyclwarr_videoram_r)
{
@ -341,7 +335,7 @@ void cyclwarr_state::common_map(address_map &map)
map(0x0a2000, 0x0a2007).w(this, FUNC(cyclwarr_state::video_config_w));
map(0x0a4000, 0x0a4001).w(this, FUNC(cyclwarr_state::bigfight_a40000_w));
map(0x0a6000, 0x0a6001).w(this, FUNC(cyclwarr_state::bigfight_a60000_w));
map(0x0a6000, 0x0a6001).w(this, FUNC(cyclwarr_state::mixing_control_w));
map(0x0ac000, 0x0ac003).w(this, FUNC(tatsumi_state::hd6445_crt_w)).umask16(0x00ff);
map(0x0b8000, 0x0b8001).w(this, FUNC(cyclwarr_state::cyclwarr_sound_w)).umask16(0xff00);

9
src/mame/includes/tatsumi.h
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@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
// copyright-holders:Bryan McPhail, Angelo Salese
#include "sound/okim6295.h"
#include "sound/ym2151.h"
@ -68,7 +68,7 @@ public:
protected:
uint8_t m_hd6445_reg[64];
void apply_shadow_bitmap(bitmap_rgb32 &bitmap, const rectangle &cliprect, bitmap_ind8 &shadow_bitmap);
void apply_shadow_bitmap(bitmap_rgb32 &bitmap, const rectangle &cliprect, bitmap_ind8 &shadow_bitmap, uint8_t xor_output);
private:
uint8_t m_hd6445_address;
};
@ -197,7 +197,7 @@ public:
DECLARE_WRITE16_MEMBER(cyclwarr_sprite_w);
DECLARE_WRITE16_MEMBER(video_config_w);
DECLARE_WRITE16_MEMBER(bigfight_a40000_w);
DECLARE_WRITE16_MEMBER(bigfight_a60000_w);
DECLARE_WRITE16_MEMBER(mixing_control_w);
DECLARE_WRITE8_MEMBER(cyclwarr_control_w);
DECLARE_WRITE8_MEMBER(cyclwarr_sound_w);
DECLARE_WRITE16_MEMBER(output_w);
@ -235,7 +235,7 @@ private:
tilemap_t *m_layer[4];
uint16_t m_video_config[4];
uint16_t m_bigfight_a60000[2];
uint16_t m_mixing_control;
uint16_t m_bigfight_a40000[2];
uint16_t m_bigfight_bank;
uint16_t m_bigfight_last_bank;
@ -246,5 +246,6 @@ private:
void tile_expand();
void draw_bg(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, tilemap_t *src, const uint16_t* scrollx, const uint16_t* scrolly, const uint16_t layer_page_size, bool is_road, int hi_priority);
void draw_bg_layers(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, int hi_priority);
void apply_highlight_bitmap(bitmap_rgb32 &bitmap, const rectangle &cliprect, bitmap_ind8 &highlight_bitmap);
};

2
src/mame/machine/tatsumi.cpp
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@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
// copyright-holders:Bryan McPhail, Angelo Salese
#include "emu.h"
#include "includes/tatsumi.h"
#include "sound/okim6295.h"

28
src/mame/video/tatsumi.cpp
View File

@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
// copyright-holders:Bryan McPhail, Angelo Salese
#include "emu.h"
#include "includes/tatsumi.h"
#include "screen.h"
@ -56,15 +56,18 @@ WRITE16_MEMBER(tatsumi_state::tatsumi_sprite_control_w)
}
// apply shadowing to underlying layers
// TODO: it might mix up with the lower palette bank instead
void tatsumi_state::apply_shadow_bitmap(bitmap_rgb32 &bitmap, const rectangle &cliprect, bitmap_ind8 &shadow_bitmap)
// TODO: it might mix up with the lower palette bank instead (color bank 0x1400?)
void tatsumi_state::apply_shadow_bitmap(bitmap_rgb32 &bitmap, const rectangle &cliprect, bitmap_ind8 &shadow_bitmap, uint8_t xor_output)
{
for(int y=cliprect.min_y;y<cliprect.max_y;y++)
{
for(int x=cliprect.min_x;x<cliprect.max_x;x++)
{
uint8_t shadow = shadow_bitmap.pix8(y, x);
if(shadow)
// xor_output is enabled during Chen boss fight (where shadows have more brightness than everything else)
// TODO: transition before fighting him should also black out all the background tilemaps too!?
// (more evidence that we need to mix with color bank 0x1400 instead of doing true RGB mixing).
if(shadow ^ xor_output)
{
rgb_t shadow_pen = bitmap.pix32(y, x);
bitmap.pix32(y, x) = rgb_t(shadow_pen.r() >> 1,shadow_pen.g() >> 1, shadow_pen.b() >> 1);
@ -702,7 +705,7 @@ uint32_t apache3_state::screen_update_apache3(screen_device &screen, bitmap_rgb3
screen.priority().fill(0, cliprect);
draw_sprites(screen.priority(),cliprect,1,(m_sprite_control_ram[0xe0]&0x1000) ? 0x1000 : 0); // Alpha pass only
draw_sky(bitmap, cliprect, 256, m_apache3_rotate_ctrl[1]);
apply_shadow_bitmap(bitmap,cliprect,screen.priority());
apply_shadow_bitmap(bitmap,cliprect,screen.priority(), 0);
// draw_ground(bitmap, cliprect);
draw_sprites(bitmap,cliprect,0, (m_sprite_control_ram[0x20]&0x1000) ? 0x1000 : 0);
m_tx_layer->draw(screen, bitmap, cliprect, 0,0);
@ -1038,7 +1041,7 @@ uint32_t roundup5_state::screen_update_roundup5(screen_device &screen, bitmap_rg
draw_landscape(bitmap,cliprect,0);
draw_landscape(bitmap,cliprect,1);
draw_road(bitmap,cliprect);
apply_shadow_bitmap(bitmap,cliprect,screen.priority());
apply_shadow_bitmap(bitmap,cliprect,screen.priority(), 0);
if(m_control_word & 0x80) // enabled on map screen after a play
{
m_tx_layer->draw(screen, bitmap, cliprect, 0,0);
@ -1078,7 +1081,16 @@ WRITE16_MEMBER(cyclwarr_state::video_config_w)
{
COMBINE_DATA(&m_video_config[offset]);
}
// mixing control (seems to be available only for Big Fight and Cycle Warriors)
// --x- ---- enabled in Big Fight, disabled in Cycle Warriors (unknown purpose)
// ---- -x-- enable shadow mixing
// ---- ---x if 1 invert shadows, i.e. shadows are drawn with original pen while non shadows are halved (Chen stage in Big Fight)
WRITE16_MEMBER(cyclwarr_state::mixing_control_w)
{
COMBINE_DATA(&m_mixing_control);
}
template<int Bank>
TILE_GET_INFO_MEMBER(cyclwarr_state::get_tile_info_bigfight)
{
@ -1309,7 +1321,7 @@ uint32_t cyclwarr_state::screen_update_cyclwarr(screen_device &screen, bitmap_rg
screen.priority().fill(0, cliprect);
draw_sprites(screen.priority(),cliprect,1,(m_sprite_control_ram[0xe0]&0x1000) ? 0x1000 : 0); // Alpha pass only
draw_bg_layers(screen, bitmap, cliprect, 0);
apply_shadow_bitmap(bitmap,cliprect,screen.priority());
apply_shadow_bitmap(bitmap,cliprect,screen.priority(), m_mixing_control & 1);
draw_sprites(bitmap,cliprect,0,(m_sprite_control_ram[0xe0]&0x1000) ? 0x1000 : 0);
draw_bg_layers(screen, bitmap, cliprect, 1);
return 0;