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-itech32: Added support for the WIDTHPIX blit flag. [Ryan Holtz]

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This commit is contained in:
Ryan Holtz 2021-01-27 19:34:30 +01:00
parent 207cbd739f
commit 4333cec3e6
2 changed files with 126 additions and 5 deletions
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1
src/mame/includes/itech32.h
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@ -190,6 +190,7 @@ protected:
virtual void logblit(const char *tag);
void update_interrupts(int fast);
void draw_raw(u16 *base, u16 color);
void draw_raw_widthpix(u16 *base, u16 color);
virtual void command_blit_raw();
virtual void command_shift_reg();
inline void draw_rle_fast(u16 *base, u16 color);

130
src/mame/video/itech32.cpp
View File

@ -114,9 +114,9 @@
#define XFERFLAG_DXDYSIGN 0x0020
#define XFERFLAG_UNKNOWN8 0x0100
#define XFERFLAG_CLIP 0x0400
#define XFERFLAG_UNKNOWN15 0x8000
#define XFERFLAG_WIDTHPIX 0x8000
#define XFERFLAG_KNOWNFLAGS (XFERFLAG_TRANSPARENT | XFERFLAG_XFLIP | XFERFLAG_YFLIP | XFERFLAG_DSTXSCALE | XFERFLAG_DYDXSIGN | XFERFLAG_DXDYSIGN | XFERFLAG_CLIP)
#define XFERFLAG_KNOWNFLAGS (XFERFLAG_TRANSPARENT | XFERFLAG_XFLIP | XFERFLAG_YFLIP | XFERFLAG_DSTXSCALE | XFERFLAG_DYDXSIGN | XFERFLAG_DXDYSIGN | XFERFLAG_CLIP | XFERFLAG_WIDTHPIX)
#define VRAM_WIDTH 512
@ -333,7 +333,7 @@ void itech32_state::logblit(const char *tag)
}
else
{
logerror("%s: e=%d%d f=%04x c=%02x%02x %02x%04x -> (%03x,%03x) %3dx%3d c=(%03x,%03x)-(%03x,%03x) s=%04x %04x %04x %04x %04x %04x", tag,
logerror("%s: e=%d%d f=%04x c=%02x%02x %02x%04x -> (%03x,%03x) %3dx%d c=(%03x,%03x)-(%03x,%03x) s=%04x %04x %04x %04x %04x %04x", tag,
m_enable_latch[0], m_enable_latch[1],
VIDEO_TRANSFER_FLAGS,
m_color_latch[0] >> 8, m_color_latch[1] >> 8,
@ -507,6 +507,118 @@ void itech32_state::draw_raw(u16 *base, u16 color)
enable_clipping();
}
/* draw a scaled primitive such that the specified width is in pixel, not scaled, coordinates */
void itech32_state::draw_raw_widthpix(u16 *base, u16 color)
{
u8* src = &m_grom[0];// m_grom[(m_grom_bank | ((VIDEO_TRANSFER_ADDRHI & 0xff) << 16) | VIDEO_TRANSFER_ADDRLO) % m_grom.length()];
const u32 grom_length = m_grom.length();
const u32 grom_base = m_grom_bank | ((VIDEO_TRANSFER_ADDRHI & 0xff) << 16) | VIDEO_TRANSFER_ADDRLO;
int transparent_pen = (VIDEO_TRANSFER_FLAGS & XFERFLAG_TRANSPARENT) ? 0xff : -1;
int width = VIDEO_TRANSFER_WIDTH << 8;
int height = ADJUSTED_HEIGHT(VIDEO_TRANSFER_HEIGHT) << 8;
int xsrcstep = VIDEO_SRC_XSTEP;
int ysrcstep = VIDEO_SRC_YSTEP;
int sx, sy = (VIDEO_TRANSFER_Y & 0xfff) << 8;
int startx = (VIDEO_TRANSFER_X & 0xfff) << 8;
int xdststep = 0x100;
int ydststep = VIDEO_DST_YSTEP;
int x, y, px;
/* adjust for (lack of) clipping */
if (!(VIDEO_TRANSFER_FLAGS & XFERFLAG_CLIP))
disable_clipping();
/* adjust for scaling */
if (VIDEO_TRANSFER_FLAGS & XFERFLAG_DSTXSCALE)
xdststep = VIDEO_DST_XSTEP;
/* adjust for flipping */
if (VIDEO_TRANSFER_FLAGS & XFERFLAG_XFLIP)
xdststep = -xdststep;
if (VIDEO_TRANSFER_FLAGS & XFERFLAG_YFLIP)
ydststep = -ydststep;
/* loop over Y in src pixels */
for (y = 0; y < height; y += ysrcstep, sy += ydststep)
{
const u32 row_base = (y >> 8) * (width >> 8);
x = 0;
px = 0;
/* simpler case: VIDEO_YSTEP_PER_X is zero */
if (VIDEO_YSTEP_PER_X == 0)
{
/* clip in the Y direction */
if (sy >= m_scaled_clip_rect.min_y && sy < m_scaled_clip_rect.max_y)
{
u32 dstoffs;
/* direction matters here */
sx = startx;
if (xdststep > 0)
{
/* skip left pixels */
for ( ; x < width && sx < m_scaled_clip_rect.min_x; x += xsrcstep, px++, sx += xdststep) ;
/* compute the address */
dstoffs = compute_safe_address(sx >> 8, sy >> 8) - (sx >> 8);
/* render middle pixels */
for ( ; px < width && sx < m_scaled_clip_rect.max_x; x += xsrcstep, px++, sx += xdststep)
{
int pixel = src[(grom_base + row_base + (x >> 8)) % grom_length];
if (pixel != transparent_pen)
base[(dstoffs + (sx >> 8)) & m_vram_mask] = pixel | color;
}
}
else
{
/* skip right pixels */
for ( ; px < width && sx >= m_scaled_clip_rect.max_x; x += xsrcstep, px++, sx += xdststep) ;
/* compute the address */
dstoffs = compute_safe_address(sx >> 8, sy >> 8) - (sx >> 8);
/* render middle pixels */
for ( ; px < width && sx >= m_scaled_clip_rect.min_x; x += xsrcstep, px++, sx += xdststep)
{
int pixel = src[(grom_base + row_base + (x >> 8)) % grom_length];
if (pixel != transparent_pen)
base[(dstoffs + (sx >> 8)) & m_vram_mask] = pixel | color;
}
}
}
}
/* slow case: VIDEO_YSTEP_PER_X is non-zero */
else
{
int ystep = (VIDEO_TRANSFER_FLAGS & XFERFLAG_DYDXSIGN) ? -VIDEO_YSTEP_PER_X : VIDEO_YSTEP_PER_X;
int ty = sy;
/* render all pixels */
sx = startx;
for ( ; px < width && sx < m_scaled_clip_rect.max_x; x += xsrcstep, px++, sx += xdststep, ty += ystep)
if (m_scaled_clip_rect.contains(sx, ty))
{
int pixel = src[(grom_base + row_base + (x >> 8)) % grom_length];
if (pixel != transparent_pen)
base[compute_safe_address(sx >> 8, ty >> 8)] = pixel | color;
}
}
/* apply skew */
if (VIDEO_TRANSFER_FLAGS & XFERFLAG_DXDYSIGN)
startx += VIDEO_XSTEP_PER_Y;
else
startx -= VIDEO_XSTEP_PER_Y;
}
/* restore cliprects */
if (!(VIDEO_TRANSFER_FLAGS & XFERFLAG_CLIP))
enable_clipping();
}
void drivedge_state::draw_raw(u16 *base, u16 *zbase, u16 color)
{
@ -1170,8 +1282,16 @@ void itech32_state::command_blit_raw()
g_profiler.start(PROFILER_USER1);
if (BLIT_LOGGING) logblit("Blit Raw");
if (m_enable_latch[0]) draw_raw(m_videoplane[0], m_color_latch[0]);
if (m_enable_latch[1]) draw_raw(m_videoplane[1], m_color_latch[1]);
if (VIDEO_TRANSFER_FLAGS & XFERFLAG_WIDTHPIX)
{
if (m_enable_latch[0]) draw_raw_widthpix(m_videoplane[0], m_color_latch[0]);
if (m_enable_latch[1]) draw_raw_widthpix(m_videoplane[1], m_color_latch[1]);
}
else
{
if (m_enable_latch[0]) draw_raw(m_videoplane[0], m_color_latch[0]);
if (m_enable_latch[1]) draw_raw(m_videoplane[1], m_color_latch[1]);
}
g_profiler.stop();
}