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MT06085: Fix "1" pixel issue mentioned.

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Actually this is more of a "half" pixel issue and caused by
discretization to pixels by drawing arbitrary length horizontal
vectors onto a bitmap.
The fix uses a 4x horizontal resolution and causes some
25% performance loss.
This commit is contained in:
couriersud 2019-04-22 14:48:34 +02:00
parent 70c4265970
commit f3e15ce818
1 changed files with 9 additions and 6 deletions
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15
src/mame/drivers/pong.cpp
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@ -96,7 +96,9 @@ TODO: Volleyball...
* http://www.youtube.com/watch?v=pDrRnJOCKZc
*/
#define MASTER_CLOCK 7159000
static const int NS_PER_CLOCK_PONG = static_cast<int>((double) NETLIST_INTERNAL_RES / (double) 7159000 + 0.5);
static const int MASTER_CLOCK_PONG = static_cast<int>((double) NETLIST_INTERNAL_RES / (double) NS_PER_CLOCK_PONG + 0.5);
#define V_TOTAL_PONG (0x105+1) // 262
#define H_TOTAL_PONG (0x1C6+1) // 454
@ -116,8 +118,8 @@ TODO: Volleyball...
*/
//#define MASTER_CLOCK_BREAKOUT (14318000)
static const int NS_PER_CLOCK = static_cast<int>((double) NETLIST_INTERNAL_RES / (double) 14318000 + 0.5);
static const int MASTER_CLOCK_BREAKOUT = static_cast<int>((double) NETLIST_INTERNAL_RES / (double) NS_PER_CLOCK + 0.5);
static const int NS_PER_CLOCK_BREAKOUT = static_cast<int>((double) NETLIST_INTERNAL_RES / (double) 14318000 + 0.5);
static const int MASTER_CLOCK_BREAKOUT = static_cast<int>((double) NETLIST_INTERNAL_RES / (double) NS_PER_CLOCK_BREAKOUT + 0.5);
static const int V_TOTAL_BREAKOUT = (0xFC); // 252
static const int H_TOTAL_BREAKOUT = (448*2); // 448
@ -489,11 +491,12 @@ void pong_state::pong(machine_config &config)
/* video hardware */
SCREEN(config, "screen", SCREEN_TYPE_RASTER);
FIXFREQ(config, m_video).set_screen("screen");
m_video->set_monitor_clock(MASTER_CLOCK);
m_video->set_monitor_clock(MASTER_CLOCK_PONG);
m_video->set_horz_params(H_TOTAL_PONG-67,H_TOTAL_PONG-40,H_TOTAL_PONG-8,H_TOTAL_PONG);
m_video->set_vert_params(V_TOTAL_PONG-22,V_TOTAL_PONG-19,V_TOTAL_PONG-12,V_TOTAL_PONG);
m_video->set_fieldcount(1);
m_video->set_threshold(0.11);
m_video->set_horz_scale(4);
/* sound hardware */
SPEAKER(config, "speaker").front_center();
@ -591,7 +594,7 @@ void pong_state::pongd(machine_config &config)
/* video hardware */
SCREEN(config, "screen", SCREEN_TYPE_RASTER);
FIXFREQ(config, m_video).set_screen("screen");
m_video->set_monitor_clock(MASTER_CLOCK);
m_video->set_monitor_clock(MASTER_CLOCK_PONG);
m_video->set_horz_params(H_TOTAL_PONG-67,H_TOTAL_PONG-52,H_TOTAL_PONG-8,H_TOTAL_PONG);
m_video->set_vert_params(V_TOTAL_PONG-22,V_TOTAL_PONG-19,V_TOTAL_PONG-12,V_TOTAL_PONG);
m_video->set_fieldcount(1);
@ -630,7 +633,7 @@ void rebound_state::rebound(machine_config &config)
/* video hardware */
SCREEN(config, "screen", SCREEN_TYPE_RASTER);
FIXFREQ(config, m_video).set_screen("screen");
m_video->set_monitor_clock(MASTER_CLOCK);
m_video->set_monitor_clock(MASTER_CLOCK_PONG);
//m_video->set_horz_params(H_TOTAL_PONG-67,H_TOTAL_PONG-40,H_TOTAL_PONG-8,H_TOTAL_PONG);
m_video->set_horz_params(H_TOTAL_PONG-51,H_TOTAL_PONG-40,H_TOTAL_PONG-8,H_TOTAL_PONG);
m_video->set_vert_params(V_TOTAL_PONG-22,V_TOTAL_PONG-19,V_TOTAL_PONG-12,V_TOTAL_PONG);