/************************************************************************* Driver for Gaelco 3D games driver by Aaron Giles **************************************************************************/ #include "emu.h" #include "includes/gaelco3d.h" #include "cpu/tms32031/tms32031.h" #include "video/rgbutil.h" #include "video/poly.h" #define MAX_POLYGONS 4096 #define MAX_POLYDATA (MAX_POLYGONS * 21) #define MAX_VERTICES 32 #define DISPLAY_TEXTURE 0 #define LOG_POLYGONS 0 #define DISPLAY_STATS 0 #define IS_POLYEND(x) (((x) ^ ((x) >> 1)) & 0x4000) struct poly_extra_data { running_machine &machine() const { assert(m_machine != NULL); return *m_machine; } running_machine *m_machine; UINT32 tex, color; float ooz_dx, ooz_dy, ooz_base; float uoz_dx, uoz_dy, uoz_base; float voz_dx, voz_dy, voz_base; float z0; }; static void render_noz_noperspective(void *dest, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid); static void render_normal(void *dest, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid); static void render_alphablend(void *dest, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid); /************************************* * * Video init * *************************************/ static void gaelco3d_exit(running_machine &machine) { gaelco3d_state *state = machine.driver_data(); poly_free(state->m_poly); } VIDEO_START( gaelco3d ) { gaelco3d_state *state = machine.driver_data(); int width, height; state->m_poly = poly_alloc(machine, 2000, sizeof(poly_extra_data), 0); machine.add_notifier(MACHINE_NOTIFY_EXIT, machine_notify_delegate(FUNC(gaelco3d_exit), &machine)); state->m_screenbits = machine.primary_screen->alloc_compatible_bitmap(); width = machine.primary_screen->width(); height = machine.primary_screen->height(); state->m_zbuffer = auto_bitmap_alloc(machine, width, height, BITMAP_FORMAT_INDEXED16); state->m_palette = auto_alloc_array(machine, rgb_t, 32768); state->m_polydata_buffer = auto_alloc_array(machine, UINT32, MAX_POLYDATA); /* save states */ state_save_register_global_pointer(machine, state->m_palette, 32768); state_save_register_global_pointer(machine, state->m_polydata_buffer, MAX_POLYDATA); state_save_register_global(machine, state->m_polydata_count); state_save_register_global(machine, state->m_polygons); state_save_register_global(machine, state->m_lastscan); state_save_register_global_bitmap(machine, state->m_screenbits); state_save_register_global_bitmap(machine, state->m_zbuffer); } /************************************* * * Polygon rendering * *************************************/ /* Polygon data stream format: data[0] (float) = scale factor to map Z to fixed Z buffer value data[1] (float) = dvoz/dy (change in v/z per Y) data[2] (float) = dvoz/dx (change in v/z per X) data[3] (float) = dooz/dy (change in 1/z per Y) data[4] (float) = dooz/dx (change in 1/z per X) data[5] (float) = duoz/dy (change in u/z per Y) data[6] (float) = duoz/dx (change in u/z per X) data[7] (float) = voz origin (value of v/z at coordinate (0,0)) data[8] (float) = ooz origin (value of 1/z at coordinate (0,0)) data[9] (float) = uoz origin (value of u/z at coordinate (0,0)) data[10] (int) = palette base (bits 14-8) data[11] (int) = texture address data[12] (int) = start point (bits 15-8 = X coordinate, bits 12-0 = Y coordinate) data[13] (int) = next point (bits 15-8 = X coordinate, bits 12-0 = Y coordinate) data[14] (int) = 16.16 dx/dy from previous point to this point (repeat these two for each additional point in the fan) */ static void render_poly(screen_device &screen, UINT32 *polydata) { gaelco3d_state *state = screen.machine().driver_data(); float midx = screen.width() / 2; float midy = screen.height() / 2; float z0 = tms3203x_device::fp_to_float(polydata[0]); float voz_dy = tms3203x_device::fp_to_float(polydata[1]) * 256.0f; float voz_dx = tms3203x_device::fp_to_float(polydata[2]) * 256.0f; float ooz_dy = tms3203x_device::fp_to_float(polydata[3]); float ooz_dx = tms3203x_device::fp_to_float(polydata[4]); float uoz_dy = tms3203x_device::fp_to_float(polydata[5]) * 256.0f; float uoz_dx = tms3203x_device::fp_to_float(polydata[6]) * 256.0f; float voz_base = tms3203x_device::fp_to_float(polydata[7]) * 256.0f - midx * voz_dx - midy * voz_dy; float ooz_base = tms3203x_device::fp_to_float(polydata[8]) - midx * ooz_dx - midy * ooz_dy; float uoz_base = tms3203x_device::fp_to_float(polydata[9]) * 256.0f - midx * uoz_dx - midy * uoz_dy; poly_extra_data *extra = (poly_extra_data *)poly_get_extra_data(state->m_poly); int color = (polydata[10] & 0x7f) << 8; poly_vertex vert[MAX_VERTICES]; UINT32 data; int vertnum; if (LOG_POLYGONS) { int t; logerror("poly: %12.2f %12.2f %12.2f %12.2f %12.2f %12.2f %12.2f %12.2f %12.2f %12.2f %08X %08X (%4d,%4d) %08X", (double)tms3203x_device::fp_to_float(polydata[0]), (double)tms3203x_device::fp_to_float(polydata[1]), (double)tms3203x_device::fp_to_float(polydata[2]), (double)tms3203x_device::fp_to_float(polydata[3]), (double)tms3203x_device::fp_to_float(polydata[4]), (double)tms3203x_device::fp_to_float(polydata[5]), (double)tms3203x_device::fp_to_float(polydata[6]), (double)tms3203x_device::fp_to_float(polydata[7]), (double)tms3203x_device::fp_to_float(polydata[8]), (double)tms3203x_device::fp_to_float(polydata[9]), polydata[10], polydata[11], (INT16)(polydata[12] >> 16), (INT16)(polydata[12] << 2) >> 2, polydata[12]); logerror(" (%4d,%4d) %08X %08X", (INT16)(polydata[13] >> 16), (INT16)(polydata[13] << 2) >> 2, polydata[13], polydata[14]); for (t = 15; !IS_POLYEND(polydata[t - 2]); t += 2) logerror(" (%4d,%4d) %08X %08X", (INT16)(polydata[t] >> 16), (INT16)(polydata[t] << 2) >> 2, polydata[t], polydata[t+1]); logerror("\n"); } /* fill in extra data */ extra->m_machine = &screen.machine(); extra->tex = polydata[11]; extra->color = color; extra->ooz_dx = ooz_dx; extra->ooz_dy = ooz_dy; extra->ooz_base = ooz_base; extra->uoz_dx = uoz_dx; extra->uoz_dy = uoz_dy; extra->uoz_base = uoz_base; extra->voz_dx = voz_dx; extra->voz_dy = voz_dy; extra->voz_base = voz_base; extra->z0 = z0; /* extract vertices */ data = 0; for (vertnum = 0; vertnum < ARRAY_LENGTH(vert) && !IS_POLYEND(data); vertnum++) { /* extract vertex data */ data = polydata[13 + vertnum * 2]; vert[vertnum].x = midx + (float)((INT32)data >> 16) + 0.5f; vert[vertnum].y = midy + (float)((INT32)(data << 18) >> 18) + 0.5f; } /* if we have a valid number of verts, render them */ if (vertnum >= 3) { const rectangle &visarea = screen.visible_area(); /* special case: no Z buffering and no perspective correction */ if (color != 0x7f00 && z0 < 0 && ooz_dx == 0 && ooz_dy == 0) poly_render_triangle_fan(state->m_poly, state->m_screenbits, &visarea, render_noz_noperspective, 0, vertnum, &vert[0]); /* general case: non-alpha blended */ else if (color != 0x7f00) poly_render_triangle_fan(state->m_poly, state->m_screenbits, &visarea, render_normal, 0, vertnum, &vert[0]); /* color 0x7f seems to be hard-coded as a 50% alpha blend */ else poly_render_triangle_fan(state->m_poly, state->m_screenbits, &visarea, render_alphablend, 0, vertnum, &vert[0]); state->m_polygons += vertnum - 2; } } static void render_noz_noperspective(void *destbase, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid) { const poly_extra_data *extra = (const poly_extra_data *)extradata; gaelco3d_state *state = extra->machine().driver_data(); bitmap_t *bitmap = (bitmap_t *)destbase; float zbase = recip_approx(extra->ooz_base); float uoz_step = extra->uoz_dx * zbase; float voz_step = extra->voz_dx * zbase; int zbufval = (int)(-extra->z0 * zbase); offs_t endmask = state->m_texture_size - 1; const rgb_t *palsource = state->m_palette + extra->color; UINT32 tex = extra->tex; UINT16 *dest = BITMAP_ADDR16(bitmap, scanline, 0); UINT16 *zbuf = BITMAP_ADDR16(state->m_zbuffer, scanline, 0); int startx = extent->startx; float uoz = (extra->uoz_base + scanline * extra->uoz_dy + startx * extra->uoz_dx) * zbase; float voz = (extra->voz_base + scanline * extra->voz_dy + startx * extra->voz_dx) * zbase; int x; for (x = startx; x < extent->stopx; x++) { int u = (int)uoz; int v = (int)voz; int pixeloffs = (tex + (v >> 8) * 4096 + (u >> 8)) & endmask; if (pixeloffs >= state->m_texmask_size || !state->m_texmask[pixeloffs]) { rgb_t rgb00 = palsource[state->m_texture[pixeloffs]]; rgb_t rgb01 = palsource[state->m_texture[(pixeloffs + 1) & endmask]]; rgb_t rgb10 = palsource[state->m_texture[(pixeloffs + 4096) & endmask]]; rgb_t rgb11 = palsource[state->m_texture[(pixeloffs + 4097) & endmask]]; rgb_t filtered = rgb_bilinear_filter(rgb00, rgb01, rgb10, rgb11, u, v); dest[x] = (filtered & 0x1f) | ((filtered & 0x1ff800) >> 6); zbuf[x] = zbufval; } /* advance texture params to the next pixel */ uoz += uoz_step; voz += voz_step; } } static void render_normal(void *destbase, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid) { const poly_extra_data *extra = (const poly_extra_data *)extradata; gaelco3d_state *state = extra->machine().driver_data(); bitmap_t *bitmap = (bitmap_t *)destbase; float ooz_dx = extra->ooz_dx; float uoz_dx = extra->uoz_dx; float voz_dx = extra->voz_dx; offs_t endmask = state->m_texture_size - 1; const rgb_t *palsource = state->m_palette + extra->color; UINT32 tex = extra->tex; float z0 = extra->z0; UINT16 *dest = BITMAP_ADDR16(bitmap, scanline, 0); UINT16 *zbuf = BITMAP_ADDR16(state->m_zbuffer, scanline, 0); int startx = extent->startx; float ooz = extra->ooz_base + scanline * extra->ooz_dy + startx * ooz_dx; float uoz = extra->uoz_base + scanline * extra->uoz_dy + startx * uoz_dx; float voz = extra->voz_base + scanline * extra->voz_dy + startx * voz_dx; int x; for (x = startx; x < extent->stopx; x++) { if (ooz > 0) { /* compute Z and check the Z buffer value first */ float z = recip_approx(ooz); int zbufval = (int)(z0 * z); if (zbufval < zbuf[x]) { int u = (int)(uoz * z); int v = (int)(voz * z); int pixeloffs = (tex + (v >> 8) * 4096 + (u >> 8)) & endmask; if (pixeloffs >= state->m_texmask_size || !state->m_texmask[pixeloffs]) { rgb_t rgb00 = palsource[state->m_texture[pixeloffs]]; rgb_t rgb01 = palsource[state->m_texture[(pixeloffs + 1) & endmask]]; rgb_t rgb10 = palsource[state->m_texture[(pixeloffs + 4096) & endmask]]; rgb_t rgb11 = palsource[state->m_texture[(pixeloffs + 4097) & endmask]]; rgb_t filtered = rgb_bilinear_filter(rgb00, rgb01, rgb10, rgb11, u, v); dest[x] = (filtered & 0x1f) | ((filtered & 0x1ff800) >> 6); zbuf[x] = (zbufval < 0) ? -zbufval : zbufval; } } } /* advance texture params to the next pixel */ ooz += ooz_dx; uoz += uoz_dx; voz += voz_dx; } } static void render_alphablend(void *destbase, INT32 scanline, const poly_extent *extent, const void *extradata, int threadid) { const poly_extra_data *extra = (const poly_extra_data *)extradata; gaelco3d_state *state = extra->machine().driver_data(); bitmap_t *bitmap = (bitmap_t *)destbase; float ooz_dx = extra->ooz_dx; float uoz_dx = extra->uoz_dx; float voz_dx = extra->voz_dx; offs_t endmask = state->m_texture_size - 1; const rgb_t *palsource = state->m_palette + extra->color; UINT32 tex = extra->tex; float z0 = extra->z0; UINT16 *dest = BITMAP_ADDR16(bitmap, scanline, 0); UINT16 *zbuf = BITMAP_ADDR16(state->m_zbuffer, scanline, 0); int startx = extent->startx; float ooz = extra->ooz_base + extra->ooz_dy * scanline + startx * ooz_dx; float uoz = extra->uoz_base + extra->uoz_dy * scanline + startx * uoz_dx; float voz = extra->voz_base + extra->voz_dy * scanline + startx * voz_dx; int x; for (x = startx; x < extent->stopx; x++) { if (ooz > 0) { /* compute Z and check the Z buffer value first */ float z = recip_approx(ooz); int zbufval = (int)(z0 * z); if (zbufval < zbuf[x]) { int u = (int)(uoz * z); int v = (int)(voz * z); int pixeloffs = (tex + (v >> 8) * 4096 + (u >> 8)) & endmask; if (pixeloffs >= state->m_texmask_size || !state->m_texmask[pixeloffs]) { rgb_t rgb00 = palsource[state->m_texture[pixeloffs]]; rgb_t rgb01 = palsource[state->m_texture[(pixeloffs + 1) & endmask]]; rgb_t rgb10 = palsource[state->m_texture[(pixeloffs + 4096) & endmask]]; rgb_t rgb11 = palsource[state->m_texture[(pixeloffs + 4097) & endmask]]; rgb_t filtered = rgb_bilinear_filter(rgb00, rgb01, rgb10, rgb11, u, v) >> 1; dest[x] = ((filtered & 0x0f) | ((filtered & 0x0f7800) >> 6)) + ((dest[x] >> 1) & 0x3def); zbuf[x] = (zbufval < 0) ? -zbufval : zbufval; } } } /* advance texture params to the next pixel */ ooz += ooz_dx; uoz += uoz_dx; voz += voz_dx; } } /************************************* * * Scene rendering * *************************************/ void gaelco3d_render(screen_device &screen) { gaelco3d_state *state = screen.machine().driver_data(); /* wait for any queued stuff to complete */ poly_wait(state->m_poly, "Time to render"); #if DISPLAY_STATS { int scan = screen.vpos(); popmessage("Polys = %4d Timeleft = %3d", state->m_polygons, (state->m_lastscan < scan) ? (scan - state->m_lastscan) : (scan + (state->m_lastscan - screen.visible_area().max_y))); } #endif state->m_polydata_count = 0; state->m_polygons = 0; state->m_lastscan = -1; } /************************************* * * Renderer access * *************************************/ WRITE32_HANDLER( gaelco3d_render_w ) { gaelco3d_state *state = space->machine().driver_data(); /* append the data to our buffer */ state->m_polydata_buffer[state->m_polydata_count++] = data; if (state->m_polydata_count >= MAX_POLYDATA) fatalerror("Out of polygon buffer space!"); /* if we've accumulated a completed poly set of data, queue it */ if (!space->machine().video().skip_this_frame()) { if (state->m_polydata_count >= 18 && (state->m_polydata_count % 2) == 1 && IS_POLYEND(state->m_polydata_buffer[state->m_polydata_count - 2])) { render_poly(*space->machine().primary_screen, &state->m_polydata_buffer[0]); state->m_polydata_count = 0; } state->m_video_changed = TRUE; } #if DISPLAY_STATS state->m_lastscan = space->machine().primary_screen->vpos(); #endif } /************************************* * * Palette access * *************************************/ WRITE16_HANDLER( gaelco3d_paletteram_w ) { gaelco3d_state *state = space->machine().driver_data(); poly_wait(state->m_poly, "Palette change"); COMBINE_DATA(&space->machine().generic.paletteram.u16[offset]); state->m_palette[offset] = ((space->machine().generic.paletteram.u16[offset] & 0x7fe0) << 6) | (space->machine().generic.paletteram.u16[offset] & 0x1f); } WRITE32_HANDLER( gaelco3d_paletteram_020_w ) { gaelco3d_state *state = space->machine().driver_data(); poly_wait(state->m_poly, "Palette change"); COMBINE_DATA(&space->machine().generic.paletteram.u32[offset]); state->m_palette[offset*2+0] = ((space->machine().generic.paletteram.u32[offset] & 0x7fe00000) >> 10) | ((space->machine().generic.paletteram.u32[offset] & 0x1f0000) >> 16); state->m_palette[offset*2+1] = ((space->machine().generic.paletteram.u32[offset] & 0x7fe0) << 6) | (space->machine().generic.paletteram.u32[offset] & 0x1f); } /************************************* * * Video update * *************************************/ SCREEN_UPDATE( gaelco3d ) { gaelco3d_state *state = screen->machine().driver_data(); int x, y, ret; if (DISPLAY_TEXTURE && (screen->machine().input().code_pressed(KEYCODE_Z) || screen->machine().input().code_pressed(KEYCODE_X))) { static int xv = 0, yv = 0x1000; UINT8 *base = state->m_texture; int length = state->m_texture_size; if (screen->machine().input().code_pressed(KEYCODE_X)) { base = state->m_texmask; length = state->m_texmask_size; } if (screen->machine().input().code_pressed(KEYCODE_LEFT) && xv >= 4) xv -= 4; if (screen->machine().input().code_pressed(KEYCODE_RIGHT) && xv < 4096 - 4) xv += 4; if (screen->machine().input().code_pressed(KEYCODE_UP) && yv >= 4) yv -= 4; if (screen->machine().input().code_pressed(KEYCODE_DOWN) && yv < 0x40000) yv += 4; for (y = cliprect->min_y; y <= cliprect->max_y; y++) { UINT16 *dest = BITMAP_ADDR16(bitmap, y, 0); for (x = cliprect->min_x; x <= cliprect->max_x; x++) { int offs = (yv + y - cliprect->min_y) * 4096 + xv + x - cliprect->min_x; if (offs < length) dest[x] = base[offs]; else dest[x] = 0; } } popmessage("(%04X,%04X)", xv, yv); } else { if (state->m_video_changed) copybitmap(bitmap, state->m_screenbits, 0,1, 0,0, cliprect); ret = state->m_video_changed; state->m_video_changed = FALSE; } logerror("---update---\n"); return (!ret); }