// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*************************************************************************
Driver for Midway Zeus games
**************************************************************************/
#include "emu.h"
#include "includes/midzeus.h"
#include "video/rgbutil.h"
/*************************************
*
* Constants
*
*************************************/
#define DUMP_WAVE_RAM 0
#define WAVERAM0_WIDTH 512
#define WAVERAM0_HEIGHT 2048
#define WAVERAM1_WIDTH 512
#define WAVERAM1_HEIGHT 512
#define BLEND_OPAQUE1 0x00000000
#define BLEND_OPAQUE2 0x4b23cb00
#define BLEND_OPAQUE3 0x4b23dd00
#define BLEND_OPAQUE4 0x00004800
#define BLEND_OPAQUE5 0xdd23dd00
#define BLEND_ADD1 0x40b68800
#define BLEND_ADD2 0xc9b78800
#define BLEND_MUL1 0x4093c800
/*************************************
*
* Function prototypes
*
*************************************/
static inline uint8_t get_texel_4bit(const void *base, int y, int x, int width);
static inline uint8_t get_texel_alt_4bit(const void *base, int y, int x, int width);
static inline uint8_t get_texel_8bit(const void *base, int y, int x, int width);
static inline uint8_t get_texel_alt_8bit(const void *base, int y, int x, int width);
/*************************************
*
* Macros
*
*************************************/
#define WAVERAM_BLOCK0(blocknum) ((void *)((uint8_t *)m_waveram[0].get() + 8 * (blocknum)))
#define WAVERAM_BLOCK1(blocknum) ((void *)((uint8_t *)m_waveram[1].get() + 8 * (blocknum)))
#define WAVERAM_PTR8(base, bytenum) ((uint8_t *)(base) + BYTE4_XOR_LE(bytenum))
#define WAVERAM_READ8(base, bytenum) (*WAVERAM_PTR8(base, bytenum))
#define WAVERAM_WRITE8(base, bytenum, data) do { *WAVERAM_PTR8(base, bytenum) = (data); } while (0)
#define WAVERAM_PTR16(base, wordnum) ((uint16_t *)(base) + BYTE_XOR_LE(wordnum))
#define WAVERAM_READ16(base, wordnum) (*WAVERAM_PTR16(base, wordnum))
#define WAVERAM_WRITE16(base, wordnum, data) do { *WAVERAM_PTR16(base, wordnum) = (data); } while (0)
#define WAVERAM_PTR32(base, dwordnum) ((uint32_t *)(base) + (dwordnum))
#define WAVERAM_READ32(base, dwordnum) (*WAVERAM_PTR32(base, dwordnum))
#define WAVERAM_WRITE32(base, dwordnum, data) do { *WAVERAM_PTR32(base, dwordnum) = (data); } while (0)
#define PIXYX_TO_WORDNUM(y, x) (((y) << 10) | (((x) & 0x1fe) << 1) | ((x) & 1))
#define DEPTHYX_TO_WORDNUM(y, x) (PIXYX_TO_WORDNUM(y, x) | 2)
#define WAVERAM_PTRPIX(base, y, x) WAVERAM_PTR16(base, PIXYX_TO_WORDNUM(y, x))
#define WAVERAM_READPIX(base, y, x) (*WAVERAM_PTRPIX(base, y, x))
#define WAVERAM_WRITEPIX(base, y, x, color) do { *WAVERAM_PTRPIX(base, y, x) = (color); } while (0)
#define WAVERAM_PTRDEPTH(base, y, x) WAVERAM_PTR16(base, DEPTHYX_TO_WORDNUM(y, x))
#define WAVERAM_READDEPTH(base, y, x) (*WAVERAM_PTRDEPTH(base, y, x))
#define WAVERAM_WRITEDEPTH(base, y, x, color) do { *WAVERAM_PTRDEPTH(base, y, x) = (color); } while (0)
/*************************************
*
* Inlines for block addressing
*
*************************************/
inline void *midzeus_state::waveram0_ptr_from_block_addr(uint32_t addr)
{
uint32_t blocknum = (addr % WAVERAM0_WIDTH) + ((addr >> 12) % WAVERAM0_HEIGHT) * WAVERAM0_WIDTH;
return WAVERAM_BLOCK0(blocknum);
}
inline void *midzeus_state::waveram0_ptr_from_expanded_addr(uint32_t addr)
{
uint32_t blocknum = (addr % WAVERAM0_WIDTH) + ((addr >> 16) % WAVERAM0_HEIGHT) * WAVERAM0_WIDTH;
return WAVERAM_BLOCK0(blocknum);
}
inline void *midzeus_state::waveram1_ptr_from_expanded_addr(uint32_t addr)
{
uint32_t blocknum = (addr % WAVERAM1_WIDTH) + ((addr >> 16) % WAVERAM1_HEIGHT) * WAVERAM1_WIDTH;
return WAVERAM_BLOCK1(blocknum);
}
inline void *midzeus_state::waveram0_ptr_from_texture_addr(uint32_t addr, int width)
{
uint32_t blocknum = (((addr & ~1) * width) / 8) % (WAVERAM0_WIDTH * WAVERAM0_HEIGHT);
return WAVERAM_BLOCK0(blocknum);
}
/*************************************
*
* Inlines for rendering
*
*************************************/
inline void midzeus_state::waveram_plot_depth(int y, int x, uint16_t color, uint16_t depth)
{
if (m_zeus_cliprect.contains(x, y))
{
WAVERAM_WRITEPIX(m_zeus_renderbase, y, x, color);
WAVERAM_WRITEDEPTH(m_zeus_renderbase, y, x, depth);
}
}
#ifdef UNUSED_FUNCTION
inline void midzeus_state::waveram_plot(int y, int x, uint16_t color)
{
if (m_zeus_cliprect.contains(x, y))
WAVERAM_WRITEPIX(m_zeus_renderbase, y, x, color);
}
inline void midzeus_state::waveram_plot_check_depth(int y, int x, uint16_t color, uint16_t depth)
{
if (m_zeus_cliprect.contains(x, y))
{
uint16_t *depthptr = WAVERAM_PTRDEPTH(m_zeus_renderbase, y, x);
if (depth <= *depthptr)
{
WAVERAM_WRITEPIX(m_zeus_renderbase, y, x, color);
*depthptr = depth;
}
}
}
inline void midzeus_state::waveram_plot_check_depth_nowrite(int y, int x, uint16_t color, uint16_t depth)
{
if (m_zeus_cliprect.contains(x, y))
{
uint16_t *depthptr = WAVERAM_PTRDEPTH(m_zeus_renderbase, y, x);
if (depth <= *depthptr)
WAVERAM_WRITEPIX(m_zeus_renderbase, y, x, color);
}
}
#endif
/*************************************
*
* Inlines for texel accesses
*
*************************************/
// 4x2 block size
static inline uint8_t get_texel_4bit(const void *base, int y, int x, int width)
{
uint32_t byteoffs = (y / 2) * (width * 2) + ((x / 8) << 3) + ((y & 1) << 2) + ((x / 2) & 3);
return (WAVERAM_READ8(base, byteoffs) >> (4 * (x & 1))) & 0x0f;
}
static inline uint8_t get_texel_8bit(const void *base, int y, int x, int width)
{
uint32_t byteoffs = (y / 2) * (width * 2) + ((x / 4) << 3) + ((y & 1) << 2) + (x & 3);
return WAVERAM_READ8(base, byteoffs);
}
// 2x2 block size
static inline uint8_t get_texel_alt_4bit(const void *base, int y, int x, int width)
{
uint32_t byteoffs = (y / 4) * (width * 4) + ((x / 4) << 3) + ((y & 3) << 1) + ((x / 2) & 1);
return (WAVERAM_READ8(base, byteoffs) >> (4 * (x & 1))) & 0x0f;
}
static inline uint8_t get_texel_alt_8bit(const void *base, int y, int x, int width)
{
uint32_t byteoffs = (y / 4) * (width * 4) + ((x / 2) << 3) + ((y & 3) << 1) + (x & 1);
return WAVERAM_READ8(base, byteoffs);
}
/*************************************
*
* Video startup
*
*************************************/
midzeus_renderer::midzeus_renderer(midzeus_state &state)
: poly_manager<float, mz_poly_extra_data, 4, 10000>(state.machine()),
m_state(state)
{}
VIDEO_START_MEMBER(midzeus_state,midzeus)
{
int i;
/* allocate memory for "wave" RAM */
m_waveram[0] = std::make_unique<uint32_t[]>(WAVERAM0_WIDTH * WAVERAM0_HEIGHT * 8/4);
m_waveram[1] = std::make_unique<uint32_t[]>(WAVERAM1_WIDTH * WAVERAM1_HEIGHT * 8/4);
/* initialize a 5-5-5 palette */
for (i = 0; i < 32768; i++)
m_palette->set_pen_color(i, pal5bit(i >> 10), pal5bit(i >> 5), pal5bit(i >> 0));
/* initialize polygon engine */
m_poly = std::make_unique<midzeus_renderer>(*this);
/* we need to cleanup on exit */
machine().add_notifier(MACHINE_NOTIFY_EXIT, machine_notify_delegate(&midzeus_state::exit_handler, this));
m_yoffs = 0;
m_texel_width = 256;
m_zeus_renderbase = m_waveram[1].get();
/* state saving */
save_item(NAME(m_zeus_fifo));
save_item(NAME(m_zeus_fifo_words));
save_item(NAME(m_zeus_matrix));
save_item(NAME(m_zeus_point));
save_item(NAME(m_zeus_light));
save_item(NAME(m_zeus_palbase));
save_item(NAME(m_zeus_objdata));
save_item(NAME(m_zeus_cliprect.min_x));
save_item(NAME(m_zeus_cliprect.max_x));
save_item(NAME(m_zeus_cliprect.min_y));
save_item(NAME(m_zeus_cliprect.max_y));
save_pointer(NAME(m_waveram[0]), WAVERAM0_WIDTH * WAVERAM0_HEIGHT * 8 / sizeof(m_waveram[0][0]));
save_pointer(NAME(m_waveram[1]), WAVERAM1_WIDTH * WAVERAM1_HEIGHT * 8 / sizeof(m_waveram[1][0]));
/* hack */
m_is_mk4b = strcmp(machine().system().name, "mk4b") == 0;
}
void midzeus_state::exit_handler()
{
#if DUMP_WAVE_RAM
FILE *f = fopen("waveram.dmp", "w");
int i;
for (i = 0; i < WAVERAM0_WIDTH * WAVERAM0_HEIGHT; i++)
{
if (i % 4 == 0) fprintf(f, "%03X%03X: ", i / WAVERAM0_WIDTH, i % WAVERAM0_WIDTH);
fprintf(f, " %08X %08X ",
WAVERAM_READ32(waveram[0], i*2+0),
WAVERAM_READ32(waveram[0], i*2+1));
if (i % 4 == 3) fprintf(f, "\n");
}
fclose(f);
#endif
}
/*************************************
*
* Video update
*
*************************************/
uint32_t midzeus_state::screen_update_midzeus(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x, y;
m_poly->wait("VIDEO_UPDATE");
/* normal update case */
if (!machine().input().code_pressed(KEYCODE_V))
{
const void *base = waveram1_ptr_from_expanded_addr(m_zeusbase[0xcc]);
int xoffs = screen.visible_area().min_x;
for (y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint16_t *dest = &bitmap.pix16(y);
for (x = cliprect.min_x; x <= cliprect.max_x; x++)
dest[x] = WAVERAM_READPIX(base, y, x - xoffs) & 0x7fff;
}
}
/* waveram drawing case */
else
{
const void *base;
if (machine().input().code_pressed(KEYCODE_DOWN)) m_yoffs += machine().input().code_pressed(KEYCODE_LSHIFT) ? 0x40 : 1;
if (machine().input().code_pressed(KEYCODE_UP)) m_yoffs -= machine().input().code_pressed(KEYCODE_LSHIFT) ? 0x40 : 1;
if (machine().input().code_pressed(KEYCODE_LEFT) && m_texel_width > 4) { m_texel_width >>= 1; while (machine().input().code_pressed(KEYCODE_LEFT)) ; }
if (machine().input().code_pressed(KEYCODE_RIGHT) && m_texel_width < 512) { m_texel_width <<= 1; while (machine().input().code_pressed(KEYCODE_RIGHT)) ; }
if (m_yoffs < 0) m_yoffs = 0;
base = waveram0_ptr_from_block_addr(m_yoffs << 12);
for (y = cliprect.min_y; y <= cliprect.max_y; y++)
{
uint16_t *dest = &bitmap.pix16(y);
for (x = cliprect.min_x; x <= cliprect.max_x; x++)
{
uint8_t tex = get_texel_8bit(base, y, x, m_texel_width);
dest[x] = (tex << 8) | tex;
}
}
popmessage("offs = %06X", m_yoffs << 12);
}
return 0;
}
/*************************************
*
* Core read handler
*
*************************************/
READ32_MEMBER(midzeus_state::zeus_r)
{
bool logit = (offset < 0xb0 || offset > 0xb7);
uint32_t result = m_zeusbase[offset & ~1];
switch (offset & ~1)
{
case 0xf0:
result = m_screen->hpos();
logit = 0;
break;
case 0xf2:
result = m_screen->vpos();
logit = 0;
break;
case 0xf4:
result = 6;
if (m_screen->vblank())
result |= 0x800;
logit = 0;
break;
case 0xf6: // status -- they wait for this & 9 == 0
// value & $9600 must == $9600 to pass Zeus system test
result = 0x9600;
if (m_zeusbase[0xb6] == 0x80040000)
result |= 1;
logit = 0;
break;
}
/* 32-bit mode */
if (m_zeusbase[0x80] & 0x00020000)
{
if (offset & 1)
result >>= 16;
if (logit)
{
if (offset & 1)
logerror("%06X:zeus32_r(%02X) = %08X -- unexpected in 32-bit mode\n", m_maincpu->pc(), offset, result);
else if (offset != 0xe0)
logerror("%06X:zeus32_r(%02X) = %08X\n", m_maincpu->pc(), offset, result);
else
logerror("%06X:zeus32_r(%02X) = %08X\n", m_maincpu->pc(), offset, result);
}
}
/* 16-bit mode */
else
{
if (offset & 1)
result >>= 16;
else
result &= 0xffff;
if (logit)
logerror("%06X:zeus16_r(%02X) = %04X\n", m_maincpu->pc(), offset, result);
}
return result;
}
/*************************************
*
* Core write handler
*
*************************************/
WRITE32_MEMBER(midzeus_state::zeus_w)
{
bool logit = m_zeus_enable_logging || ((offset < 0xb0 || offset > 0xb7) && (offset < 0xe0 || offset > 0xe1));
if (logit)
logerror("%06X:zeus_w", m_maincpu->pc());
/* 32-bit mode */
if (m_zeusbase[0x80] & 0x00020000)
zeus_register32_w(offset, data, logit);
/* 16-bit mode */
else
zeus_register16_w(offset, data, logit);
}
/*************************************
*
* Handle writes to an internal
* pointer register
*
*************************************/
void midzeus_state::zeus_pointer_w(uint32_t which, uint32_t data, bool logit)
{
switch (which & 0xffffff)
{
case 0x008000:
case 0x018000:
if (logit)
logerror(" -- setptr(objdata)\n");
m_zeus_objdata = data;
break;
// case 0x00c040: -- set in model data in invasn
case 0x00c040:
if (logit)
logerror(" -- setptr(palbase)\n");
m_zeus_palbase = data;
break;
case 0x02c0f0:
if (logit)
logerror(" -- setptr(unkbase)\n");
m_zeus_unkbase = data;
break;
// case 0x004040: -- set via FIFO command in mk4 (len=02)
// case 0x02c0f0: -- set in model data in mk4 (len=0f)
// case 0x03c0f0: -- set via FIFO command in mk4 (len=00)
// case 0x02c0e7: -- set via FIFO command in mk4 (len=08)
// case 0x04c09c: -- set via FIFO command in mk4 (len=08)
// case 0x05c0a5: -- set via FIFO command in mk4 (len=21)
// case 0x80c0a5: -- set via FIFO command in mk4 (len=3f)
// case 0x81c0a5: -- set via FIFO command in mk4 (len=35)
// case 0x82c0a5: -- set via FIFO command in mk4 (len=41)
// case 0x00c0f0: -- set via FIFO command in invasn (len=0f)
// case 0x00c0b0: -- set via FIFO command in invasn (len=3f) -- seems to be the same as c0a5
// case 0x05c0b0: -- set via FIFO command in invasn (len=21)
// case 0x00c09c: -- set via FIFO command in invasn (len=06)
// case 0x00c0a3: -- set via FIFO command in invasn (len=0a)
default:
if (logit)
logerror(" -- setptr(%06X)\n", which & 0xffffff);
break;
}
if (logit)
log_waveram(data);
}
/*************************************
*
* Handle register writes
*
*************************************/
void midzeus_state::zeus_register16_w(offs_t offset, uint16_t data, bool logit)
{
/* writes to register $CC need to force a partial update */
if ((offset & ~1) == 0xcc)
m_screen->update_partial(m_screen->vpos());
/* write to high part on odd addresses */
if (offset & 1)
m_zeusbase[offset & ~1] = (m_zeusbase[offset & ~1] & 0x0000ffff) | (data << 16);
/* write to low part on event addresses */
else
m_zeusbase[offset & ~1] = (m_zeusbase[offset & ~1] & 0xffff0000) | (data & 0xffff);
/* log appropriately */
if (logit)
logerror("(%02X) = %04X [%08X]\n", offset, data & 0xffff, m_zeusbase[offset & ~1]);
/* handle the update */
if ((offset & 1) == 0)
zeus_register_update(offset);
}
void midzeus_state::zeus_register32_w(offs_t offset, uint32_t data, bool logit)
{
/* writes to register $CC need to force a partial update */
if ((offset & ~1) == 0xcc)
m_screen->update_partial(m_screen->vpos());
/* always write to low word? */
m_zeusbase[offset & ~1] = data;
/* log appropriately */
if (logit)
{
if (offset & 1)
logerror("(%02X) = %08X -- unexpected in 32-bit mode\n", offset, data);
else if (offset != 0xe0)
logerror("(%02X) = %08X\n", offset, data);
else
logerror("(%02X) = %08X\n", offset, data);
}
/* handle the update */
if ((offset & 1) == 0)
zeus_register_update(offset);
}
/*************************************
*
* Update state after a register write
*
*************************************/
void midzeus_state::zeus_register_update(offs_t offset)
{
/* handle the writes; only trigger on low accesses */
switch (offset)
{
case 0x52:
m_zeusbase[0xb2] = m_zeusbase[0x52];
break;
case 0x60:
/* invasn writes here to execute a command (?) */
if (m_zeusbase[0x60] & 1)
{
if ((m_zeusbase[0x80] & 0xffffff) == 0x22FCFF)
{
// m_zeusbase[0x00] = color
// m_zeusbase[0x02] = ??? = 0x000C0000
// m_zeusbase[0x04] = ??? = 0x00000E01
// m_zeusbase[0x06] = ??? = 0xFFFF0030
// m_zeusbase[0x08] = vert[0] = (y0 << 16) | x0
// m_zeusbase[0x0a] = vert[1] = (y1 << 16) | x1
// m_zeusbase[0x0c] = vert[2] = (y2 << 16) | x2
// m_zeusbase[0x0e] = vert[3] = (y3 << 16) | x3
// m_zeusbase[0x18] = ??? = 0xFFFFFFFF
// m_zeusbase[0x1a] = ??? = 0xFFFFFFFF
// m_zeusbase[0x1c] = ??? = 0xFFFFFFFF
// m_zeusbase[0x1e] = ??? = 0xFFFFFFFF
// m_zeusbase[0x20] = ??? = 0x00000000
// m_zeusbase[0x22] = ??? = 0x00000000
// m_zeusbase[0x24] = ??? = 0x00000000
// m_zeusbase[0x26] = ??? = 0x00000000
// m_zeusbase[0x40] = ??? = 0x00000000
// m_zeusbase[0x42] = ??? = 0x00000000
// m_zeusbase[0x44] = ??? = 0x00000000
// m_zeusbase[0x46] = ??? = 0x00000000
// m_zeusbase[0x4c] = ??? = 0x00808080 (brightness?)
// m_zeusbase[0x4e] = ??? = 0x00808080 (brightness?)
mz_poly_extra_data& extra = m_poly->object_data_alloc();
poly_vertex vert[4];
vert[0].x = (int16_t)m_zeusbase[0x08];
vert[0].y = (int16_t)(m_zeusbase[0x08] >> 16);
vert[1].x = (int16_t)m_zeusbase[0x0a];
vert[1].y = (int16_t)(m_zeusbase[0x0a] >> 16);
vert[2].x = (int16_t)m_zeusbase[0x0c];
vert[2].y = (int16_t)(m_zeusbase[0x0c] >> 16);
vert[3].x = (int16_t)m_zeusbase[0x0e];
vert[3].y = (int16_t)(m_zeusbase[0x0e] >> 16);
extra.solidcolor = m_zeusbase[0x00];
extra.zoffset = 0x7fff;
m_poly->zeus_draw_debug_quad(m_zeus_cliprect, vert);
m_poly->wait("Normal");
}
else
logerror("Execute unknown command\n");
}
break;
case 0x70:
m_zeus_point[0] = m_zeusbase[0x70] << 16;
break;
case 0x72:
m_zeus_point[1] = m_zeusbase[0x72] << 16;
break;
case 0x74:
m_zeus_point[2] = m_zeusbase[0x74] << 16;
break;
case 0x80:
/* this bit enables the "FIFO empty" IRQ; since our virtual FIFO is always empty,
we simply assert immediately if this is enabled. invasn needs this for proper
operations */
if (m_zeusbase[0x80] & 0x02000000)
m_maincpu->set_input_line(2, ASSERT_LINE);
else
m_maincpu->set_input_line(2, CLEAR_LINE);
break;
case 0x84:
/* MK4: Written in tandem with 0xcc */
/* MK4: Writes either 0x80 (and 0x000000 to 0xcc) or 0x00 (and 0x800000 to 0xcc) */
m_zeus_renderbase = waveram1_ptr_from_expanded_addr(m_zeusbase[0x84] << 16);
break;
case 0xb0:
case 0xb2:
if ((m_zeusbase[0xb6] >> 16) != 0)
{
if ((offset == 0xb0 && (m_zeusbase[0xb6] & 0x02000000) == 0) ||
(offset == 0xb2 && (m_zeusbase[0xb6] & 0x02000000) != 0))
{
void *dest;
if (m_zeusbase[0xb6] & 0x80000000)
dest = waveram1_ptr_from_expanded_addr(m_zeusbase[0xb4]);
else
dest = waveram0_ptr_from_expanded_addr(m_zeusbase[0xb4]);
if (m_zeusbase[0xb6] & 0x00100000)
WAVERAM_WRITE16(dest, 0, m_zeusbase[0xb0]);
if (m_zeusbase[0xb6] & 0x00200000)
WAVERAM_WRITE16(dest, 1, m_zeusbase[0xb0] >> 16);
if (m_zeusbase[0xb6] & 0x00400000)
WAVERAM_WRITE16(dest, 2, m_zeusbase[0xb2]);
if (m_zeusbase[0xb6] & 0x00800000)
WAVERAM_WRITE16(dest, 3, m_zeusbase[0xb2] >> 16);
if (m_zeusbase[0xb6] & 0x00020000)
m_zeusbase[0xb4]++;
}
}
break;
case 0xb4:
if (m_zeusbase[0xb6] & 0x00010000)
{
const uint32_t *src;
if (m_zeusbase[0xb6] & 0x80000000)
src = (const uint32_t *)waveram1_ptr_from_expanded_addr(m_zeusbase[0xb4]);
else
src = (const uint32_t *)waveram0_ptr_from_expanded_addr(m_zeusbase[0xb4]);
m_poly->wait("vram_read");
m_zeusbase[0xb0] = WAVERAM_READ32(src, 0);
m_zeusbase[0xb2] = WAVERAM_READ32(src, 1);
}
break;
case 0xc0:
case 0xc2:
case 0xc4:
case 0xc6:
case 0xc8:
case 0xca:
m_screen->update_partial(m_screen->vpos());
{
int vtotal = m_zeusbase[0xca] >> 16;
int htotal = m_zeusbase[0xc6] >> 16;
rectangle visarea(m_zeusbase[0xc6] & 0xffff, htotal - 3, 0, m_zeusbase[0xc8] & 0xffff);
if (htotal > 0 && vtotal > 0 && visarea.min_x < visarea.max_x && visarea.max_y < vtotal)
{
m_screen->configure(htotal, vtotal, visarea, HZ_TO_ATTOSECONDS(MIDZEUS_VIDEO_CLOCK / 8.0 / (htotal * vtotal)));
m_zeus_cliprect = visarea;
m_zeus_cliprect.max_x -= m_zeus_cliprect.min_x;
m_zeus_cliprect.min_x = 0;
}
}
break;
case 0xcc:
m_screen->update_partial(m_screen->vpos());
m_log_fifo = machine().input().code_pressed(KEYCODE_L);
break;
case 0xe0:
m_zeus_fifo[m_zeus_fifo_words++] = m_zeusbase[0xe0];
if (zeus_fifo_process(m_zeus_fifo, m_zeus_fifo_words))
m_zeus_fifo_words = 0;
break;
}
}
/*************************************
*
* Process the FIFO
*
*************************************/
int midzeus_state::zeus_fifo_process(const uint32_t *data, int numwords)
{
/* handle logging */
switch (data[0] >> 24)
{
/* 0x00/0x01: set pointer */
/* in model data, this is 0x0C */
case 0x00:
case 0x01:
if (numwords < 2 && data[0] != 0)
return false;
if (m_log_fifo)
log_fifo_command(data, numwords, "");
zeus_pointer_w(data[0] & 0xffffff, data[1], m_log_fifo);
break;
/* 0x13: render model based on previously set information */
case 0x13: /* invasn */
if (m_log_fifo)
log_fifo_command(data, numwords, "");
zeus_draw_model((m_zeusbase[0x06] << 16), m_log_fifo);
break;
/* 0x17: write 16-bit value to low registers */
case 0x17:
if (m_log_fifo)
log_fifo_command(data, numwords, " -- reg16");
zeus_register16_w((data[0] >> 16) & 0x7f, data[0], m_log_fifo);
break;
/* 0x18: write 32-bit value to low registers */
/* in model data, this is 0x19 */
case 0x18:
if (numwords < 2)
return false;
if (m_log_fifo)
log_fifo_command(data, numwords, " -- reg32");
zeus_register32_w((data[0] >> 16) & 0x7f, data[1], m_log_fifo);
break;
/* 0x1A/0x1B: sync pipeline(?) */
case 0x1a:
case 0x1b:
if (m_log_fifo)
log_fifo_command(data, numwords, " -- sync\n");
break;
/* 0x1C/0x1E: write matrix and translation vector */
case 0x1c:
case 0x1e:
/* single matrix form */
if ((data[0] & 0xffff) != 0x7fff)
{
/* requires 8 words total */
if (numwords < 8)
return false;
if (m_log_fifo)
{
log_fifo_command(data, numwords, "");
logerror("\n\t\tmatrix ( %04X %04X %04X ) ( %04X %04X %04X ) ( %04X %04X %04X )\n\t\tvector %8.2f %8.2f %8.5f\n",
data[2] & 0xffff, data[2] >> 16, data[0] & 0xffff,
data[3] & 0xffff, data[3] >> 16, data[1] >> 16,
data[4] & 0xffff, data[4] >> 16, data[1] & 0xffff,
(double)(int32_t)data[5] * (1.0 / 65536.0),
(double)(int32_t)data[6] * (1.0 / 65536.0),
(double)(int32_t)data[7] * (1.0 / (65536.0 * 512.0)));
}
/* extract the matrix from the raw data */
m_zeus_matrix[0][0] = data[2]; m_zeus_matrix[0][1] = data[2] >> 16; m_zeus_matrix[0][2] = data[0];
m_zeus_matrix[1][0] = data[3]; m_zeus_matrix[1][1] = data[3] >> 16; m_zeus_matrix[1][2] = data[1] >> 16;
m_zeus_matrix[2][0] = data[4]; m_zeus_matrix[2][1] = data[4] >> 16; m_zeus_matrix[2][2] = data[1];
/* extract the translation point from the raw data */
m_zeus_point[0] = data[5];
m_zeus_point[1] = data[6];
m_zeus_point[2] = data[7];
}
/* double matrix form */
else
{
int16_t matrix1[3][3];
int16_t matrix2[3][3];
/* requires 13 words total */
if (numwords < 13)
return false;
if (m_log_fifo)
{
log_fifo_command(data, numwords, "");
logerror("\n\t\tmatrix ( %04X %04X %04X ) ( %04X %04X %04X ) ( %04X %04X %04X )\n\t\tmatrix ( %04X %04X %04X ) ( %04X %04X %04X ) ( %04X %04X %04X )\n\t\tvector %8.2f %8.2f %8.5f\n",
data[4] & 0xffff, data[4] >> 16, data[5] >> 16,
data[8] & 0xffff, data[8] >> 16, data[6] >> 16,
data[9] & 0xffff, data[9] >> 16, data[7] >> 16,
data[1] & 0xffff, data[2] & 0xffff, data[3] & 0xffff,
data[1] >> 16, data[2] >> 16, data[3] >> 16,
data[5] & 0xffff, data[6] & 0xffff, data[7] & 0xffff,
(double)(int32_t)data[10] * (1.0 / 65536.0),
(double)(int32_t)data[11] * (1.0 / 65536.0),
(double)(int32_t)data[12] * (1.0 / (65536.0 * 512.0)));
}
/* extract the first matrix from the raw data */
matrix1[0][0] = data[4]; matrix1[0][1] = data[4] >> 16; matrix1[0][2] = data[5] >> 16;
matrix1[1][0] = data[8]; matrix1[1][1] = data[8] >> 16; matrix1[1][2] = data[6] >> 16;
matrix1[2][0] = data[9]; matrix1[2][1] = data[9] >> 16; matrix1[2][2] = data[7] >> 16;
/* extract the second matrix from the raw data */
matrix2[0][0] = data[1]; matrix2[0][1] = data[2]; matrix2[0][2] = data[3];
matrix2[1][0] = data[1] >> 16; matrix2[1][1] = data[2] >> 16; matrix2[1][2] = data[3] >> 16;
matrix2[2][0] = data[5]; matrix2[2][1] = data[6]; matrix2[2][2] = data[7];
/* multiply them together to get the final matrix */
m_zeus_matrix[0][0] = ((int64_t)(matrix1[0][0] * matrix2[0][0]) + (int64_t)(matrix1[0][1] * matrix2[1][0]) + (int64_t)(matrix1[0][2] * matrix2[2][0])) >> 16;
m_zeus_matrix[0][1] = ((int64_t)(matrix1[0][0] * matrix2[0][1]) + (int64_t)(matrix1[0][1] * matrix2[1][1]) + (int64_t)(matrix1[0][2] * matrix2[2][1])) >> 16;
m_zeus_matrix[0][2] = ((int64_t)(matrix1[0][0] * matrix2[0][2]) + (int64_t)(matrix1[0][1] * matrix2[1][2]) + (int64_t)(matrix1[0][2] * matrix2[2][2])) >> 16;
m_zeus_matrix[1][0] = ((int64_t)(matrix1[1][0] * matrix2[0][0]) + (int64_t)(matrix1[1][1] * matrix2[1][0]) + (int64_t)(matrix1[1][2] * matrix2[2][0])) >> 16;
m_zeus_matrix[1][1] = ((int64_t)(matrix1[1][0] * matrix2[0][1]) + (int64_t)(matrix1[1][1] * matrix2[1][1]) + (int64_t)(matrix1[1][2] * matrix2[2][1])) >> 16;
m_zeus_matrix[1][2] = ((int64_t)(matrix1[1][0] * matrix2[0][2]) + (int64_t)(matrix1[1][1] * matrix2[1][2]) + (int64_t)(matrix1[1][2] * matrix2[2][2])) >> 16;
m_zeus_matrix[2][0] = ((int64_t)(matrix1[2][0] * matrix2[0][0]) + (int64_t)(matrix1[2][1] * matrix2[1][0]) + (int64_t)(matrix1[2][2] * matrix2[2][0])) >> 16;
m_zeus_matrix[2][1] = ((int64_t)(matrix1[2][0] * matrix2[0][1]) + (int64_t)(matrix1[2][1] * matrix2[1][1]) + (int64_t)(matrix1[2][2] * matrix2[2][1])) >> 16;
m_zeus_matrix[2][2] = ((int64_t)(matrix1[2][0] * matrix2[0][2]) + (int64_t)(matrix1[2][1] * matrix2[1][2]) + (int64_t)(matrix1[2][2] * matrix2[2][2])) >> 16;
/* extract the translation point from the raw data */
m_zeus_point[0] = data[10];
m_zeus_point[1] = data[11];
m_zeus_point[2] = data[12];
}
break;
/* 0x23: some additional X,Y,Z coordinates */
/* 0x2e: same for invasn */
case 0x23:
case 0x2e:
if (numwords < 2)
return false;
if (m_log_fifo)
{
log_fifo_command(data, numwords, "");
logerror(" -- light xyz = %d,%d,%d\n", (int16_t)data[1], (int16_t)(data[1] >> 16), (int16_t)data[0]);
}
m_zeus_light[0] = (int16_t)(data[1] & 0xffff);
m_zeus_light[1] = (int16_t)(data[1] >> 16);
m_zeus_light[2] = (int16_t)(data[0] & 0xffff);
break;
/* 0x25: display control? */
/* 0x28: same for mk4b */
/* 0x30: same for invasn */
case 0x25:
{
/* 0x25 is used differently in mk4b. What determines this? */
if (m_is_mk4b)
{
if (numwords < 2)
return false;
break;
}
}
case 0x28:
case 0x30:
if (numwords < 4 || ((data[0] & 0x808000) && numwords < 10))
return false;
if (m_log_fifo)
log_fifo_command(data, numwords, " -- alt. quad and hack screen clear\n");
if ((numwords < 10) && (data[0] & 0xffff7f) == 0)
{
/* not right -- just a hack */
int x, y;
for (y = m_zeus_cliprect.min_y; y <= m_zeus_cliprect.max_y; y++)
for (x = m_zeus_cliprect.min_x; x <= m_zeus_cliprect.max_x; x++)
waveram_plot_depth(y, x, 0, 0x7fff);
}
else
{
uint32_t texdata = (m_zeusbase[0x06] << 16) | (m_zeusbase[0x00] >> 16);
m_poly->zeus_draw_quad(false, data, texdata, m_log_fifo);
}
break;
/* 0x2d: unknown - invasn */
/* 0x70: same for mk4 */
case 0x2d:
case 0x70:
if (m_log_fifo)
log_fifo_command(data, numwords, "\n");
break;
/* 0x67: render model with inline texture info */
case 0x67:
if (numwords < 3)
return false;
if (m_log_fifo)
log_fifo_command(data, numwords, "");
m_zeus_objdata = data[1];
zeus_draw_model(data[2], m_log_fifo);
break;
default:
printf("Unknown command %08X\n", data[0]);
if (m_log_fifo)
log_fifo_command(data, numwords, "\n");
break;
}
return true;
}
/*************************************
*
* Draw a model in waveram
*
*************************************/
void midzeus_state::zeus_draw_model(uint32_t texdata, bool logit)
{
uint32_t databuffer[32];
int databufcount = 0;
int model_done = false;
if (logit)
logerror(" -- model @ %08X\n", m_zeus_objdata);
while (m_zeus_objdata != 0 && !model_done)
{
const void *base = waveram0_ptr_from_block_addr(m_zeus_objdata);
int count = m_zeus_objdata >> 24;
int curoffs;
/* reset the objdata address */
m_zeus_objdata = 0;
/* loop until we run out of data */
for (curoffs = 0; curoffs <= count; curoffs++)
{
int countneeded;
uint8_t cmd;
/* accumulate 2 words of data */
databuffer[databufcount++] = WAVERAM_READ32(base, curoffs * 2 + 0);
databuffer[databufcount++] = WAVERAM_READ32(base, curoffs * 2 + 1);
/* if this is enough, process the command */
cmd = databuffer[0] >> 24;
countneeded = (cmd == 0x25 || cmd == 0x30 || cmd == 0x28) ? 14 : 2;
if (databufcount == countneeded)
{
/* handle logging of the command */
if (logit)
{
int offs;
logerror("\t");
for (offs = 0; offs < databufcount; offs++)
logerror("%08X ", databuffer[offs]);
logerror("-- ");
}
/* handle the command */
switch (cmd)
{
case 0x08:
if (logit)
logerror("end of model\n");
model_done = true;
break;
case 0x0c: /* mk4/invasn */
zeus_pointer_w(databuffer[0] & 0xffffff, databuffer[1], logit);
break;
case 0x17: /* mk4 */
if (logit)
logerror("reg16");
zeus_register16_w((databuffer[0] >> 16) & 0x7f, databuffer[0], logit);
if (((databuffer[0] >> 16) & 0x7f) == 0x06)
texdata = (texdata & 0xffff) | (m_zeusbase[0x06] << 16);
break;
case 0x19: /* invasn */
if (logit)
logerror("reg32");
zeus_register32_w((databuffer[0] >> 16) & 0x7f, databuffer[1], logit);
if (((databuffer[0] >> 16) & 0x7f) == 0x06)
texdata = (texdata & 0xffff) | (m_zeusbase[0x06] << 16);
break;
case 0x25: /* mk4 */
case 0x28: /* mk4r1 */
case 0x30: /* invasn */
m_poly->zeus_draw_quad(true, databuffer, texdata, logit);
break;
default:
if (logit)
logerror("unknown\n");
break;
}
/* reset the count */
databufcount = 0;
}
}
}
}
/*************************************
*
* Draw a quad
*
*************************************/
void midzeus_renderer::zeus_draw_quad(int long_fmt, const uint32_t *databuffer, uint32_t texdata, bool logit)
{
poly_vertex clipvert[8];
poly_vertex vert[4];
uint32_t ushift, vshift;
float maxy, maxx;
uint32_t texbase, texwshift;
uint32_t numverts;
uint32_t ctrl_word = databuffer[long_fmt ? 1 : 9];
texbase = ((texdata >> 10) & 0x3f0000) | (texdata & 0xffff);
texwshift = (texdata >> 22) & 7;
ushift = 8 - ((m_state.m_zeusbase[0x04] >> 4) & 3);
vshift = 8 - ((m_state.m_zeusbase[0x04] >> 6) & 3);
int xy_offset = long_fmt ? 2 : 1;
int16_t (*zeus_matrix)[3] = m_state.m_zeus_matrix;
int32_t *zeus_point = m_state.m_zeus_point;
for (uint32_t i = 0; i < 4; i++)
{
uint32_t ixy = databuffer[xy_offset + i*2];
uint32_t iuvz = databuffer[xy_offset + 1 + i*2];
int32_t xo = (int16_t)ixy;
int32_t yo = (int16_t)(ixy >> 16);
int32_t zo = (int16_t)iuvz;
uint8_t u = iuvz >> 16;
uint8_t v = iuvz >> 24;
int64_t x, y, z;
x = (int64_t)(xo * zeus_matrix[0][0]) + (int64_t)(yo * zeus_matrix[0][1]) + (int64_t)(zo * zeus_matrix[0][2]) + zeus_point[0];
y = (int64_t)(xo * zeus_matrix[1][0]) + (int64_t)(yo * zeus_matrix[1][1]) + (int64_t)(zo * zeus_matrix[1][2]) + zeus_point[1];
z = (int64_t)(xo * zeus_matrix[2][0]) + (int64_t)(yo * zeus_matrix[2][1]) + (int64_t)(zo * zeus_matrix[2][2]) + zeus_point[2];
// Rounding hack
x = (x + 0x00004000) & ~0x00007fffULL;
y = (y + 0x00004000) & ~0x00007fffULL;
z = (z + 0x00004000) & ~0x00007fffULL;
// back face cull using polygon normal and first vertex
if (i == 0)
{
int16_t normal[3];
int32_t rotnormal[3];
normal[0] = (int8_t)(databuffer[0] >> 0);
normal[1] = (int8_t)(databuffer[0] >> 8);
normal[2] = (int8_t)(databuffer[0] >> 16);
rotnormal[0] = normal[0] * zeus_matrix[0][0] + normal[1] * zeus_matrix[0][1] + normal[2] * zeus_matrix[0][2];
rotnormal[1] = normal[0] * zeus_matrix[1][0] + normal[1] * zeus_matrix[1][1] + normal[2] * zeus_matrix[1][2];
rotnormal[2] = normal[0] * zeus_matrix[2][0] + normal[1] * zeus_matrix[2][1] + normal[2] * zeus_matrix[2][2];
int64_t dot = rotnormal[0] * x + rotnormal[1] * y + rotnormal[2] * z;
if (dot >= 0)
return;
}
if (long_fmt)
{
#if 0
// TODO: Lighting
uint32_t inormal = databuffer[10 + i];
int32_t xn = (int32_t)(((inormal >> 0) & 0x3ff) << 22) >> 22;
int32_t yn = (int32_t)(((inormal >> 10) & 0x3ff) << 22) >> 22;
int32_t zn = (int32_t)(((inormal >> 20) & 0x3ff) << 22) >> 22;
#endif
}
vert[i].x = x;
vert[i].y = y;
vert[i].p[0] = z;
vert[i].p[1] = u << ushift;
vert[i].p[2] = v << vshift;
vert[i].p[3] = 0xffff;
if (logit)
{
m_state.logerror("\t\t(%f,%f,%f) UV:(%02X,%02X) UV_SCALE:(%02X,%02X) (%03X,%03X,%03X) dot=%08X\n",
(double) vert[i].x * (1.0 / 65536.0), (double) vert[i].y * (1.0 / 65536.0), (double) vert[i].p[0] * (1.0 / 65536.0),
(iuvz >> 16) & 0xff, (iuvz >> 24) & 0xff,
(int)(vert[i].p[1] / 256.0f), (int)(vert[i].p[2] / 256.0f),
(databuffer[10 + i] >> 20) & 0x3ff, (databuffer[10 + i] >> 10) & 0x3ff, (databuffer[10 + i] >> 0) & 0x3ff,
0);
}
}
numverts = m_state.m_poly->zclip_if_less(4, &vert[0], &clipvert[0], 4, 512.0f);
if (numverts < 3)
return;
maxx = maxy = -1000.0f;
for (uint32_t i = 0; i < numverts; i++)
{
float ooz = 512.0f / clipvert[i].p[0];
clipvert[i].x *= ooz;
clipvert[i].y *= ooz;
clipvert[i].x += 200.5f;
clipvert[i].y += 128.5f;
maxx = std::max(maxx, clipvert[i].x);
maxy = std::max(maxy, clipvert[i].y);
if (logit)
m_state.logerror("\t\t\tTranslated=(%f,%f,%f)\n", (double) clipvert[i].x, (double) clipvert[i].y, (double) clipvert[i].p[0]);
}
for (uint32_t i = 0; i < numverts; i++)
{
if (clipvert[i].x == maxx)
clipvert[i].x += 0.0005f;
if (clipvert[i].y == maxy)
clipvert[i].y += 0.0005f;
}
mz_poly_extra_data& extra = m_state.m_poly->object_data_alloc();
if (ctrl_word & 0x01000000)
{
uint32_t tex_type = (texdata >> 16) & 3;
extra.texwidth = 512 >> texwshift;
extra.voffset = ctrl_word & 0xffff;
extra.texbase = m_state.waveram0_ptr_from_texture_addr(texbase, extra.texwidth);
if (tex_type == 1)
{
extra.get_texel = texdata & 0x00200000 ? get_texel_8bit : get_texel_4bit;
}
else if (tex_type == 2)
{
extra.get_texel = texdata & 0x00200000 ? get_texel_alt_8bit : get_texel_alt_4bit;
}
else
{
printf("Unknown texture type: %d\n", tex_type);
return;
}
}
extra.ctrl_word = ctrl_word;
extra.solidcolor = m_state.m_zeusbase[0x00] & 0x7fff;
extra.zoffset = m_state.m_zeusbase[0x7e] >> 16;
extra.alpha = m_state.m_zeusbase[0x4e];
extra.blend = m_state.m_zeusbase[0x5c];
extra.depth_test_enable = !(m_state.m_zeusbase[0x04] & 0x800);
extra.depth_write_enable = m_state.m_zeusbase[0x04] & 0x200;
extra.transcolor = ((ctrl_word >> 16) & 1) ? 0 : 0x100;
extra.palbase = m_state.waveram0_ptr_from_block_addr(m_state.m_zeus_palbase);
// Note: Before being upgraded to the new polygon rasterizing code, this function call was
// a poly_render_quad_fan. It appears as though the new code defaults to a fan if
// the template argument is 4, but keep an eye out for missing quads.
m_state.m_poly->render_polygon<4>(m_state.m_zeus_cliprect,
render_delegate(&midzeus_renderer::render_poly, this),
4,
clipvert);
}
void midzeus_renderer::zeus_draw_debug_quad(const rectangle& rect, const vertex_t *vert)
{
m_state.m_poly->render_polygon<4>(rect, render_delegate(&midzeus_renderer::render_poly_solid_fixedz, this), 0, vert);
}
/*************************************
*
* Rasterizers
*
*************************************/
void midzeus_renderer::render_poly(int32_t scanline, const extent_t& extent, const mz_poly_extra_data& object, int threadid)
{
int32_t curz = extent.param[0].start;
int32_t curu = extent.param[1].start;
int32_t curv = extent.param[2].start;
int32_t curi = extent.param[3].start;
int32_t dzdx = extent.param[0].dpdx;
int32_t dudx = extent.param[1].dpdx;
int32_t dvdx = extent.param[2].dpdx;
int32_t didx = extent.param[3].dpdx;
const void *texbase = object.texbase;
const void *palbase = object.palbase;
uint16_t transcolor = object.transcolor;
uint32_t texwidth = object.texwidth;
for (uint32_t x = extent.startx; x < extent.stopx; x++)
{
uint16_t *depthptr = WAVERAM_PTRDEPTH(m_state.m_zeus_renderbase, scanline, x);
int32_t depth = (curz >> 16) + object.zoffset;
if (depth > 0x7fff)
depth = 0x7fff;
uint32_t i8 = curi >> 8;
bool depth_pass;
if (object.depth_test_enable)
depth_pass = depth >= 0 && depth <= *depthptr;
else
depth_pass = true;
if (depth_pass)
{
rgb_t src=0;
bool src_valid = true;
if ((object.ctrl_word & 0x000c0000) == 0x000c0000)
{
src.set_r(pal5bit(object.solidcolor >> 10));
src.set_g(pal5bit(object.solidcolor >> 5));
src.set_b(pal5bit(object.solidcolor));
}
else
{
uint32_t u0 = curu >> 8;
uint32_t v0 = object.voffset + (curv >> 8);
uint32_t u1 = u0 + 1;
uint32_t v1 = v0 + 1;
uint8_t texels[4];
texels[0] = object.get_texel(texbase, v0, u0, texwidth);
texels[1] = object.get_texel(texbase, v0, u1, texwidth);
texels[2] = object.get_texel(texbase, v1, u0, texwidth);
texels[3] = object.get_texel(texbase, v1, u1, texwidth);
if (texels[0] != transcolor)
{
rgb_t color[4] = {0, 0, 0, 0};
for (uint32_t i = 0; i < 4; ++i)
{
uint16_t pix = WAVERAM_READ16(palbase, texels[i]);
color[i].set_r(pal5bit(pix >> 10));
color[i].set_g(pal5bit(pix >> 5));
color[i].set_b(pal5bit(pix));
}
src = rgbaint_t::bilinear_filter(color[0], color[1], color[2], color[3], curu & 0xff, curv & 0xff);
}
else
{
src_valid = false;
}
}
if (src_valid)
{
uint32_t srcr = src.r();
uint32_t srcg = src.g();
uint32_t srcb = src.b();
uint32_t dstr = 0;
uint32_t dstg = 0;
uint32_t dstb = 0;
uint32_t outr = 0;
uint32_t outg = 0;
uint32_t outb = 0;
uint32_t srca = object.alpha & 0xff;
uint32_t dsta = (object.alpha >> 8) & 0xff;
// Destination enable?
if (object.blend & 0x00800000)
{
uint16_t dst = WAVERAM_READPIX(m_state.m_zeus_renderbase, scanline, x);
dstr = (dst >> 10) & 0x1f;
dstg = (dst >> 5) & 0x1f;
dstb = dst & 0x1f;
dstr = (dstr << 3) | (dstr >> 2);
dstg = (dstg << 3) | (dstg >> 2);
dstb = (dstb << 3) | (dstb >> 2);
}
switch (object.blend)
{
case BLEND_OPAQUE1:
{
outr = srcr;
outg = srcg;
outb = srcb;
break;
}
case BLEND_OPAQUE2:
{
outr = (srcr * i8) >> 8;
outg = (srcg * i8) >> 8;
outb = (srcb * i8) >> 8;
break;
}
case BLEND_OPAQUE3:
{
outr = (srcr * i8) >> 8;
outg = (srcg * i8) >> 8;
outb = (srcb * i8) >> 8;
break;
}
case BLEND_OPAQUE4:
{
outr = srcr;
outg = srcg;
outb = srcb;
break;
}
case BLEND_OPAQUE5:
{
// TODO: Fog factor?
outr = (srcr * srca) >> 8;
outg = (srcg * srca) >> 8;
outb = (srcb * srca) >> 8;
break;
}
case BLEND_ADD1:
{
outr = ((srcr * srca) >> 8) + dstr;
outg = ((srcg * srca) >> 8) + dstg;
outb = ((srcb * srca) >> 8) + dstb;
break;
}
case BLEND_ADD2:
{
outr = ((srcr * srca) >> 8) + ((dstr * (dsta << 1)) >> 8);
outg = ((srcg * srca) >> 8) + ((dstg * (dsta << 1)) >> 8);
outb = ((srcb * srca) >> 8) + ((dstb * (dsta << 1)) >> 8);
break;
}
case BLEND_MUL1:
{
outr = (((srcr * (srca << 1)) >> 8) * dstr) >> 8;
outg = (((srcg * (srca << 1)) >> 8) * dstg) >> 8;
outb = (((srcb * (srca << 1)) >> 8) * dstb) >> 8;
break;
}
default:
{
outr = srcr;
outg = srcg;
outb = srcb;
break;
}
}
outr = outr > 0xff ? 0xff : outr;
outg = outg > 0xff ? 0xff : outg;
outb = outb > 0xff ? 0xff : outb;
outr >>= 3;
outg >>= 3;
outb >>= 3;
WAVERAM_WRITEPIX(m_state.m_zeus_renderbase, scanline, x, (outr << 10) | (outg << 5) | outb);
if (object.depth_write_enable)
*depthptr = depth;
}
}
curz += dzdx;
curu += dudx;
curv += dvdx;
curi += didx;
}
}
void midzeus_renderer::render_poly_solid_fixedz(int32_t scanline, const extent_t& extent, const mz_poly_extra_data& object, int threadid)
{
uint16_t color = object.solidcolor;
uint16_t depth = object.zoffset;
int x;
for (x = extent.startx; x < extent.stopx; x++)
m_state.waveram_plot_depth(scanline, x, color, depth);
}
/*************************************
*
* Debugging tools
*
*************************************/
void midzeus_state::log_fifo_command(const uint32_t *data, int numwords, const char *suffix)
{
int wordnum;
logerror("Zeus cmd %02X :", data[0] >> 24);
for (wordnum = 0; wordnum < numwords; wordnum++)
logerror(" %08X", data[wordnum]);
logerror("%s", suffix);
}
void midzeus_state::log_waveram(uint32_t length_and_base)
{
static struct
{
uint32_t lab;
uint32_t checksum;
} recent_entries[100];
uint32_t numoctets = (length_and_base >> 24) + 1;
const uint32_t *ptr = (const uint32_t *)waveram0_ptr_from_block_addr(length_and_base);
uint32_t checksum = length_and_base;
int foundit = false;
int i;
for (i = 0; i < numoctets; i++)
checksum += ptr[i*2] + ptr[i*2+1];
for (i = 0; i < ARRAY_LENGTH(recent_entries); i++)
if (recent_entries[i].lab == length_and_base && recent_entries[i].checksum == checksum)
{
foundit = true;
break;
}
if (i == ARRAY_LENGTH(recent_entries))
i--;
if (i != 0)
{
memmove(&recent_entries[1], &recent_entries[0], i * sizeof(recent_entries[0]));
recent_entries[0].lab = length_and_base;
recent_entries[0].checksum = checksum;
}
if (foundit)
return;
for (i = 0; i < numoctets; i++)
logerror("\t%02X: %08X %08X\n", i, ptr[i*2], ptr[i*2+1]);
}