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(MESS) spectrum.c partial screen updates

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note: for now hooked only at 128k screen page flip
This commit is contained in:
MetalliC 2015-02-04 16:59:00 +02:00
parent ffa3b0299f
commit 128ba6317b
3 changed files with 37 additions and 9 deletions
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3
src/mess/drivers/pentagon.c
View File

@ -120,6 +120,9 @@ WRITE8_MEMBER(pentagon_state::pentagon_port_7ffd_w)
if (m_port_7ffd_data & 0x20)
return;
if ((m_port_7ffd_data ^ data) & 0x08)
spectrum_UpdateBorderBitmap();
/* store new state */
m_port_7ffd_data = data;

3
src/mess/drivers/spec128.c
View File

@ -172,6 +172,9 @@ WRITE8_MEMBER(spectrum_state::spectrum_128_port_7ffd_w)
if (m_port_7ffd_data & 0x20)
return;
if ((m_port_7ffd_data ^ data) & 0x08)
spectrum_UpdateBorderBitmap();
/* store new state */
m_port_7ffd_data = data;

40
src/mess/video/spectrum.c
View File

@ -39,6 +39,8 @@ VIDEO_START_MEMBER(spectrum_state,spectrum_128)
m_previous_border_x = 0; m_previous_border_y = 0;
machine().first_screen()->register_screen_bitmap(m_border_bitmap);
m_screen_location = m_ram->pointer() + (5 << 14);
}
@ -58,6 +60,8 @@ void spectrum_state::screen_eof_spectrum(screen_device &screen, bool state)
// rising edge
if (state)
{
spectrum_UpdateBorderBitmap();
m_frame_number++;
if (m_frame_number >= m_frame_invert_count)
@ -65,9 +69,6 @@ void spectrum_state::screen_eof_spectrum(screen_device &screen, bool state)
m_frame_number = 0;
m_flash_invert = !m_flash_invert;
}
spectrum_UpdateBorderBitmap();
}
}
@ -103,6 +104,10 @@ inline void spectrum_state::spectrum_plot_pixel(bitmap_ind16 &bitmap, int x, int
UINT32 spectrum_state::screen_update_spectrum(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if (m_border_bitmap.valid())
copyscrollbitmap(bitmap, m_border_bitmap, 0, 0, 0, 0, cliprect);
#if 0
// note, don't update borders in here, this can time travel w/regards to other timers and may end up giving you
// screen positions earlier than the last write handler gave you
@ -112,9 +117,6 @@ UINT32 spectrum_state::screen_update_spectrum(screen_device &screen, bitmap_ind1
unsigned char *attr, *scr;
// int full_refresh = 1;
if (m_border_bitmap.valid())
copyscrollbitmap(bitmap, m_border_bitmap, 0, 0, 0, 0, cliprect);
scr=m_screen_location;
for (y=0; y<192; y++)
@ -149,6 +151,7 @@ UINT32 spectrum_state::screen_update_spectrum(screen_device &screen, bitmap_ind1
attr++;
}
}
#endif
return 0;
}
@ -191,14 +194,33 @@ void spectrum_state::spectrum_UpdateBorderBitmap()
if (m_border_bitmap.valid())
{
int colour = m_port_fe_data & 0x07;
UINT16 border = m_port_fe_data & 0x07;
//printf("update border from %d,%d to %d,%d\n", m_previous_border_x, m_previous_border_y, x, y);
do
{
UINT16* bm = &m_border_bitmap.pix16(m_previous_border_y);
bm[m_previous_border_x] = colour;
UINT16 scrx = m_previous_border_x - SPEC_LEFT_BORDER;
UINT16 scry = m_previous_border_y - SPEC_TOP_BORDER;
if (scrx < SPEC_DISPLAY_XSIZE && scry < SPEC_DISPLAY_YSIZE)
{
// this can/must be optimised
if ((scrx & 7) == 0) {
UINT16 *bm = &m_border_bitmap.pix16(m_previous_border_y, m_previous_border_x);
UINT8 attr = *(m_screen_location + ((scry & 0xF8) << 2) + (scrx >> 3) + 0x1800);
UINT8 scr = *(m_screen_location + ((scry & 7) << 8) + ((scry & 0x38) << 2) + ((scry & 0xC0) << 5) + (scrx >> 3));
UINT16 ink = (attr & 0x07) + ((attr >> 3) & 0x08);
UINT16 pap = (attr >> 3) & 0x0f;
if (m_flash_invert && (attr & 0x80))
scr = ~scr;
for (UINT8 b = 0x80; b != 0; b >>= 1)
*bm++ = (scr & b) ? ink : pap;
}
} else
m_border_bitmap.pix16(m_previous_border_y, m_previous_border_x) = border;
m_previous_border_x += 1;