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video/jagblit.c: Implemented gouraud shading.

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This commit is contained in:
Ville Linde 2013-02-13 22:53:43 +00:00
parent 87bd8632b5
commit 18da9b0de2
1 changed files with 62 additions and 33 deletions
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95
src/mame/video/jagblit.c
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@ -296,6 +296,22 @@ void jaguar_state::FUNCNAME(UINT32 command, UINT32 a1flags, UINT32 a2flags)
adest_xmask = (COMMAND & 0x00000800) ? a2_xmask : a1_xmask;
adest_ymask = (COMMAND & 0x00000800) ? a2_ymask : a1_ymask;
int gouraud_color[4];
gouraud_color[0] = (m_blitter_regs[B_PATD_H] >> 16) & 0xff00;
gouraud_color[1] = m_blitter_regs[B_PATD_H] & 0xff00;
gouraud_color[2] = (m_blitter_regs[B_PATD_L] >> 16) & 0xff00;
gouraud_color[3] = m_blitter_regs[B_PATD_L] & 0xff00;
int gouraud_inten[4];
gouraud_inten[3] = m_blitter_regs[B_I0] & 0xffffff;
gouraud_inten[2] = m_blitter_regs[B_I1] & 0xffffff;
gouraud_inten[1] = m_blitter_regs[B_I2] & 0xffffff;
gouraud_inten[0] = m_blitter_regs[B_I3] & 0xffffff;
int gouraud_iinc = m_blitter_regs[B_IINC] & 0xffffff;
if (gouraud_iinc & 0x800000)
gouraud_iinc |= 0xff000000;
if (LOG_BLITS)
{
logerror("%s:Blit!\n", machine().describe_context());
@ -347,41 +363,41 @@ void jaguar_state::FUNCNAME(UINT32 command, UINT32 a1flags, UINT32 a2flags)
/* load src data and Z */
if (COMMAND & 0x00000001)
{
srcdata = READ_PIXEL(asrc, asrcflags);
srcdata = READ_PIXEL(asrc, asrcflags);
if (COMMAND & 0x00000002)
srczdata = READ_ZDATA(asrc, asrcflags);
srczdata = READ_ZDATA(asrc, asrcflags);
else if (COMMAND & 0x001c020)
srczdata = READ_RDATA(B_SRCZ1_H, asrc, asrcflags, asrc_phrase_mode);
srczdata = READ_RDATA(B_SRCZ1_H, asrc, asrcflags, asrc_phrase_mode);
}
else
{
srcdata = READ_RDATA(B_SRCD_H, asrc, asrcflags, asrc_phrase_mode);
srcdata = READ_RDATA(B_SRCD_H, asrc, asrcflags, asrc_phrase_mode);
if (COMMAND & 0x001c020)
srczdata = READ_RDATA(B_SRCZ1_H, asrc, asrcflags, asrc_phrase_mode);
srczdata = READ_RDATA(B_SRCZ1_H, asrc, asrcflags, asrc_phrase_mode);
}
/* load dst data and Z */
if (COMMAND & 0x00000008)
{
dstdata = READ_PIXEL(adest, adestflags);
dstdata = READ_PIXEL(adest, adestflags);
if (COMMAND & 0x00000010)
dstzdata = READ_ZDATA(adest, adestflags);
dstzdata = READ_ZDATA(adest, adestflags);
else
dstzdata = READ_RDATA(B_DSTZ_H, adest, adestflags, adest_phrase_mode);
dstzdata = READ_RDATA(B_DSTZ_H, adest, adestflags, adest_phrase_mode);
}
else
{
dstdata = READ_RDATA(B_DSTD_H, adest, adestflags, adest_phrase_mode);
dstdata = READ_RDATA(B_DSTD_H, adest, adestflags, adest_phrase_mode);
if (COMMAND & 0x00000010)
dstzdata = READ_RDATA(B_DSTZ_H, adest, adestflags, adest_phrase_mode);
dstzdata = READ_RDATA(B_DSTZ_H, adest, adestflags, adest_phrase_mode);
}
/* handle clipping */
if (COMMAND & 0x00000040)
{
if (adest_x < 0 || adest_y < 0 ||
(adest_x >> 16) >= (m_blitter_regs[A1_CLIP] & 0x7fff) ||
(adest_y >> 16) >= ((m_blitter_regs[A1_CLIP] >> 16) & 0x7fff))
if (adest_x < 0 || adest_y < 0 ||
(adest_x >> 16) >= (m_blitter_regs[A1_CLIP] & 0x7fff) ||
(adest_y >> 16) >= ((m_blitter_regs[A1_CLIP] >> 16) & 0x7fff))
inhibit = 1;
}
@ -398,12 +414,12 @@ void jaguar_state::FUNCNAME(UINT32 command, UINT32 a1flags, UINT32 a2flags)
{
if (!(COMMAND & 0x02000000))
{
if (srcdata == READ_RDATA(B_PATD_H, asrc, asrcflags, asrc_phrase_mode))
if (srcdata == READ_RDATA(B_PATD_H, asrc, asrcflags, asrc_phrase_mode))
inhibit = 1;
}
else
{
if (dstdata == READ_RDATA(B_PATD_H, adest, adestflags, adest_phrase_mode))
if (dstdata == READ_RDATA(B_PATD_H, adest, adestflags, adest_phrase_mode))
inhibit = 1;
}
}
@ -413,7 +429,7 @@ void jaguar_state::FUNCNAME(UINT32 command, UINT32 a1flags, UINT32 a2flags)
{
/* handle patterns/additive/LFU */
if (COMMAND & 0x00010000)
writedata = READ_RDATA(B_PATD_H, adest, adestflags, adest_phrase_mode);
writedata = READ_RDATA(B_PATD_H, adest, adestflags, adest_phrase_mode);
else if (COMMAND & 0x00020000)
{
writedata = (srcdata & 0xff) + (dstdata & 0xff);
@ -436,28 +452,41 @@ void jaguar_state::FUNCNAME(UINT32 command, UINT32 a1flags, UINT32 a2flags)
writedata |= srcdata & dstdata;
}
/* handle source shading */
if (COMMAND & 0x40000000)
{
int intensity = srcdata & 0x00ff;
intensity += (INT8) (m_blitter_regs[B_IINC] >> 16);
if (intensity < 0)
intensity = 0;
else if (intensity > 0xff)
intensity = 0xff;
writedata = (srcdata & 0xff00) | intensity;
}
/* handle source shading */
if (COMMAND & 0x40000000)
{
int intensity = srcdata & 0x00ff;
intensity += (INT8) (m_blitter_regs[B_IINC] >> 16);
if (intensity < 0)
intensity = 0;
else if (intensity > 0xff)
intensity = 0xff;
writedata = (srcdata & 0xff00) | intensity;
}
/* handle gouraud shading */
if (COMMAND & 0x1000)
{
int p = asrc_phrase_mode ? (asrc_x & 3) : 3;
writedata = ((gouraud_inten[p] >> 16) & 0xff) | gouraud_color[p];
int intensity = gouraud_inten[p];
intensity += gouraud_iinc;
if (intensity < 0) intensity = 0;
if (intensity > 0xffffff) intensity = 0xffffff;
gouraud_inten[p] = intensity;
}
}
else
writedata = dstdata;
if (adest_phrase_mode || (command & 0x10000000) || !inhibit)
{
/* write to the destination */
WRITE_PIXEL(adestflags, writedata);
if (COMMAND & 0x00000020)
if ((command & 0x10000000) || !inhibit)
{
/* write to the destination */
WRITE_PIXEL(adestflags, writedata);
if (COMMAND & 0x00000020)
WRITE_ZDATA(adestflags, srczdata);
}
}
/* update X/Y */
asrc_x = (asrc_x + asrc_xadd) & asrc_xmask;