diff options
Diffstat (limited to 'src/mame/gaelco/gaelco3d_v.cpp')
-rw-r--r-- | src/mame/gaelco/gaelco3d_v.cpp | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/src/mame/gaelco/gaelco3d_v.cpp b/src/mame/gaelco/gaelco3d_v.cpp new file mode 100644 index 00000000000..9d7c033334f --- /dev/null +++ b/src/mame/gaelco/gaelco3d_v.cpp @@ -0,0 +1,476 @@ +// license:BSD-3-Clause +// copyright-holders:Aaron Giles +/************************************************************************* + + Driver for Gaelco 3D games + + driver by Aaron Giles + +**************************************************************************/ + +#include "emu.h" +#include "gaelco3d.h" + +#include "cpu/tms32031/tms32031.h" + +#include "video/rgbutil.h" + + +static constexpr unsigned MAX_POLYGONS = 4096; +static constexpr unsigned MAX_POLYDATA = MAX_POLYGONS * 21; +static constexpr unsigned MAX_VERTICES = 32; + +#define DISPLAY_TEXTURE 0 +#define LOG_POLYGONS 0 +#define DISPLAY_STATS 0 + +constexpr bool IS_POLYEND(uint32_t x) { return BIT(x ^ (x >> 1), 14); } + + +gaelco3d_state::gaelco3d_renderer::gaelco3d_renderer(gaelco3d_state &state) : + poly_manager<float, gaelco3d_object_data, 1>(state.machine()), + m_state(state), + m_screenbits(state.m_screen->width(), state.m_screen->height()), + m_zbuffer(state.m_screen->width(), state.m_screen->height()), + m_polygons(0), + m_texture_size(state.memregion("texture")->bytes()), + m_texmask_size(state.memregion("texmask")->bytes() * 8), + m_texture(std::make_unique<uint8_t[]>(m_texture_size)), + m_texmask(std::make_unique<uint8_t[]>(m_texmask_size)) +{ + state.machine().save().save_item(NAME(m_screenbits)); + state.machine().save().save_item(NAME(m_zbuffer)); + + /* first expand the pixel data */ + uint8_t *src = state.memregion("texture")->base(); + uint8_t *dst = m_texture.get(); + for (int y = 0; y < m_texture_size/4096; y += 2) + for (int x = 0; x < 4096; x += 2) + { + dst[(y + 0) * 4096 + (x + 1)] = src[0 * m_texture_size / 4 + (y / 2) * 2048 + (x / 2)]; + dst[(y + 1) * 4096 + (x + 1)] = src[1 * m_texture_size / 4 + (y / 2) * 2048 + (x / 2)]; + dst[(y + 0) * 4096 + (x + 0)] = src[2 * m_texture_size / 4 + (y / 2) * 2048 + (x / 2)]; + dst[(y + 1) * 4096 + (x + 0)] = src[3 * m_texture_size / 4 + (y / 2) * 2048 + (x / 2)]; + } + + /* then expand the mask data */ + src = state.memregion("texmask")->base(); + dst = m_texmask.get(); + for (int y = 0; y < m_texmask_size/4096; y++) + for (int x = 0; x < 4096; x++) + dst[y * 4096 + x] = (src[(x / 1024) * (m_texmask_size / 8 / 4) + (y * 1024 + x % 1024) / 8] >> (x % 8)) & 1; +} + + +/************************************* + * + * Video init + * + *************************************/ + +void gaelco3d_state::video_start() +{ + m_poly = std::make_unique<gaelco3d_renderer>(*this); + + m_palette = std::make_unique<rgb_t[]>(32768); + m_polydata_buffer = std::make_unique<uint32_t[]>(MAX_POLYDATA); + + /* save states */ + + save_pointer(NAME(m_palette), 32768); + save_pointer(NAME(m_polydata_buffer), MAX_POLYDATA); + save_item(NAME(m_polydata_count)); + save_item(NAME(m_lastscan)); +} + + + +/************************************* + * + * 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) +*/ + +void gaelco3d_state::gaelco3d_renderer::render_poly(screen_device &screen, uint32_t *polydata) +{ + float const midx = screen.width() / 2; + float const midy = screen.height() / 2; + float const z0 = tms3203x_device::fp_to_float(polydata[0]); + float const voz_dy = tms3203x_device::fp_to_float(polydata[1]) * 256.0f; + float const voz_dx = tms3203x_device::fp_to_float(polydata[2]) * 256.0f; + float const ooz_dy = tms3203x_device::fp_to_float(polydata[3]); + float const ooz_dx = tms3203x_device::fp_to_float(polydata[4]); + float const uoz_dy = tms3203x_device::fp_to_float(polydata[5]) * 256.0f; + float const uoz_dx = tms3203x_device::fp_to_float(polydata[6]) * 256.0f; + float const voz_base = tms3203x_device::fp_to_float(polydata[7]) * 256.0f - midx * voz_dx - midy * voz_dy; + float const ooz_base = tms3203x_device::fp_to_float(polydata[8]) - midx * ooz_dx - midy * ooz_dy; + float const uoz_base = tms3203x_device::fp_to_float(polydata[9]) * 256.0f - midx * uoz_dx - midy * uoz_dy; + gaelco3d_object_data &object = object_data().next(); + int const color = (polydata[10] & 0x7f) << 8; + vertex_t vert[MAX_VERTICES]; + + if (LOG_POLYGONS) + { + int t; + m_state.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_t)(polydata[12] >> 16), (int16_t)(polydata[12] << 2) >> 2, polydata[12]); + + m_state.logerror(" (%4d,%4d) %08X %08X", (int16_t)(polydata[13] >> 16), (int16_t)(polydata[13] << 2) >> 2, polydata[13], polydata[14]); + for (t = 15; !IS_POLYEND(polydata[t - 2]); t += 2) + m_state.logerror(" (%4d,%4d) %08X %08X", (int16_t)(polydata[t] >> 16), (int16_t)(polydata[t] << 2) >> 2, polydata[t], polydata[t+1]); + m_state.logerror("\n"); + } + + /* fill in object data */ + object.tex = polydata[11]; + object.color = color; + object.ooz_dx = ooz_dx; + object.ooz_dy = ooz_dy; + object.ooz_base = ooz_base; + object.uoz_dx = uoz_dx; + object.uoz_dy = uoz_dy; + object.uoz_base = uoz_base; + object.voz_dx = voz_dx; + object.voz_dy = voz_dy; + object.voz_base = voz_base; + object.z0 = z0; + + /* extract vertices */ + uint32_t data = 0; + int vertnum; + for (vertnum = 0; vertnum < std::size(vert) && !IS_POLYEND(data); vertnum++) + { + /* extract vertex data */ + data = polydata[13 + vertnum * 2]; + vert[vertnum].x = midx + (float)((int32_t)data >> 16) + 0.5f; + vert[vertnum].y = midy + (float)((int32_t)(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) + render_triangle_fan<0>(visarea, render_delegate(&gaelco3d_renderer::render_noz_noperspective, this), vertnum, &vert[0]); + + /* general case: non-alpha blended */ + else if (color != 0x7f00) + render_triangle_fan<0>(visarea, render_delegate(&gaelco3d_renderer::render_normal, this), vertnum, &vert[0]); + + /* color 0x7f seems to be hard-coded as a 50% alpha blend */ + else + render_triangle_fan<0>(visarea, render_delegate(&gaelco3d_renderer::render_alphablend, this), vertnum, &vert[0]); + + m_polygons += vertnum - 2; + } +} + + + +void gaelco3d_state::gaelco3d_renderer::render_noz_noperspective(int32_t scanline, const extent_t &extent, const gaelco3d_object_data &object, int threadid) +{ + float const zbase = recip_approx(object.ooz_base); + float const uoz_step = object.uoz_dx * zbase; + float const voz_step = object.voz_dx * zbase; + int const zbufval = (int)(-object.z0 * zbase); + offs_t const endmask = m_texture_size - 1; + const rgb_t *const palsource = m_state.m_palette.get() + object.color; + uint32_t const tex = object.tex; + uint16_t *const dest = &m_screenbits.pix(scanline); + uint16_t *const zbuf = &m_zbuffer.pix(scanline); + int const startx = extent.startx; + float uoz = (object.uoz_base + scanline * object.uoz_dy + startx * object.uoz_dx) * zbase; + float voz = (object.voz_base + scanline * object.voz_dy + startx * object.voz_dx) * zbase; + + for (int x = startx; x < extent.stopx; x++) + { + int const u = (int)uoz; + int const v = (int)voz; + int const pixeloffs = (tex + (v >> 8) * 4096 + (u >> 8)) & endmask; + if (pixeloffs >= m_texmask_size || !m_texmask[pixeloffs]) + { + uint32_t rgb00 = palsource[m_texture[pixeloffs]]; + uint32_t rgb01 = palsource[m_texture[(pixeloffs + 1) & endmask]]; + uint32_t rgb10 = palsource[m_texture[(pixeloffs + 4096) & endmask]]; + uint32_t rgb11 = palsource[m_texture[(pixeloffs + 4097) & endmask]]; + const uint32_t filtered = rgbaint_t::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; + } +} + + +void gaelco3d_state::gaelco3d_renderer::render_normal(int32_t scanline, const extent_t &extent, const gaelco3d_object_data &object, int threadid) +{ + float const ooz_dx = object.ooz_dx; + float const uoz_dx = object.uoz_dx; + float const voz_dx = object.voz_dx; + offs_t const endmask = m_texture_size - 1; + const rgb_t *const palsource = m_state.m_palette.get() + object.color; + uint32_t const tex = object.tex; + float const z0 = object.z0; + uint16_t *const dest = &m_screenbits.pix(scanline); + uint16_t *const zbuf = &m_zbuffer.pix(scanline); + int const startx = extent.startx; + float ooz = object.ooz_base + scanline * object.ooz_dy + startx * ooz_dx; + float uoz = object.uoz_base + scanline * object.uoz_dy + startx * uoz_dx; + float voz = object.voz_base + scanline * object.voz_dy + startx * voz_dx; + + for (int x = startx; x < extent.stopx; x++) + { + if (ooz > 0) + { + /* compute Z and check the Z buffer value first */ + float const z = recip_approx(ooz); + int zbufval = (int)(z0 * z); + if (zbufval < zbuf[x]) + { + int const u = (int)(uoz * z); + int const v = (int)(voz * z); + int const pixeloffs = (tex + (v >> 8) * 4096 + (u >> 8)) & endmask; + if (pixeloffs >= m_texmask_size || !m_texmask[pixeloffs]) + { + uint32_t rgb00 = palsource[m_texture[pixeloffs]]; + uint32_t rgb01 = palsource[m_texture[(pixeloffs + 1) & endmask]]; + uint32_t rgb10 = palsource[m_texture[(pixeloffs + 4096) & endmask]]; + uint32_t rgb11 = palsource[m_texture[(pixeloffs + 4097) & endmask]]; + const uint32_t filtered = rgbaint_t::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; + } +} + + +void gaelco3d_state::gaelco3d_renderer::render_alphablend(int32_t scanline, const extent_t &extent, const gaelco3d_object_data &object, int threadid) +{ + float const ooz_dx = object.ooz_dx; + float const uoz_dx = object.uoz_dx; + float const voz_dx = object.voz_dx; + offs_t const endmask = m_texture_size - 1; + const rgb_t *const palsource = m_state.m_palette.get() + object.color; + uint32_t const tex = object.tex; + float const z0 = object.z0; + uint16_t *const dest = &m_screenbits.pix(scanline); + uint16_t *const zbuf = &m_zbuffer.pix(scanline); + int const startx = extent.startx; + float ooz = object.ooz_base + object.ooz_dy * scanline + startx * ooz_dx; + float uoz = object.uoz_base + object.uoz_dy * scanline + startx * uoz_dx; + float voz = object.voz_base + object.voz_dy * scanline + startx * voz_dx; + + for (int x = startx; x < extent.stopx; x++) + { + if (ooz > 0) + { + /* compute Z and check the Z buffer value first */ + float const z = recip_approx(ooz); + int const zbufval = (int)(z0 * z); + if (zbufval < zbuf[x]) + { + int const u = (int)(uoz * z); + int const v = (int)(voz * z); + int const pixeloffs = (tex + (v >> 8) * 4096 + (u >> 8)) & endmask; + if (pixeloffs >= m_texmask_size || !m_texmask[pixeloffs]) + { + uint32_t rgb00 = palsource[m_texture[pixeloffs]]; + uint32_t rgb01 = palsource[m_texture[(pixeloffs + 1) & endmask]]; + uint32_t rgb10 = palsource[m_texture[(pixeloffs + 4096) & endmask]]; + uint32_t rgb11 = palsource[m_texture[(pixeloffs + 4097) & endmask]]; + const uint32_t filtered = rgbaint_t::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_state::gaelco3d_render(screen_device &screen) +{ + /* wait for any queued stuff to complete */ + m_poly->wait("Time to render"); + +#if DISPLAY_STATS +{ + int const scan = screen.vpos(); + popmessage("Polys = %4d Timeleft = %3d", m_poly->polygons(), (m_lastscan < scan) ? (scan - m_lastscan) : (scan + (m_lastscan - screen.visible_area().max_y))); +} +#endif + + m_polydata_count = 0; + m_lastscan = -1; +} + + + +/************************************* + * + * Renderer access + * + *************************************/ + +void gaelco3d_state::render_w(uint32_t data) +{ + /* append the data to our buffer */ + m_polydata_buffer[m_polydata_count++] = data; + if (m_polydata_count >= MAX_POLYDATA) + fatalerror("Out of polygon buffer space!\n"); + + /* if we've accumulated a completed poly set of data, queue it */ + if (!machine().video().skip_this_frame()) + { + if (m_polydata_count >= 18 && (m_polydata_count % 2) == 1 && IS_POLYEND(m_polydata_buffer[m_polydata_count - 2])) + { + m_poly->render_poly(*m_screen, &m_polydata_buffer[0]); + m_polydata_count = 0; + } + m_video_changed = true; + } + +#if DISPLAY_STATS + m_lastscan = m_screen->vpos(); +#endif +} + + + +/************************************* + * + * Palette access + * + *************************************/ + +void gaelco3d_state::paletteram_w(offs_t offset, uint16_t data, uint16_t mem_mask) +{ + m_poly->wait("Palette change"); + COMBINE_DATA(&m_paletteram16[offset]); + m_palette[offset] = ((m_paletteram16[offset] & 0x7fe0) << 6) | (m_paletteram16[offset] & 0x1f); +} + + +void gaelco3d_state::paletteram_020_w(offs_t offset, uint32_t data, uint32_t mem_mask) +{ + m_poly->wait("Palette change"); + COMBINE_DATA(&m_paletteram32[offset]); + m_palette[offset * 2 + 0] = ((m_paletteram32[offset] & 0x7fe00000) >> 10) | ((m_paletteram32[offset] & 0x1f0000) >> 16); + m_palette[offset * 2 + 1] = ((m_paletteram32[offset] & 0x7fe0) << 6) | (m_paletteram32[offset] & 0x1f); +} + + + +/************************************* + * + * Video update + * + *************************************/ + +uint32_t gaelco3d_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + int ret = 0; + +/* + if (DISPLAY_TEXTURE && (machine().input().code_pressed(KEYCODE_Z) || machine().input().code_pressed(KEYCODE_X))) + { + static int xv = 0, yv = 0x1000; + uint8_t *base = m_texture; + int length = m_texture_size; + + if (machine().input().code_pressed(KEYCODE_X)) + { + base = m_texmask; + length = m_texmask_size; + } + + if (machine().input().code_pressed(KEYCODE_LEFT) && xv >= 4) + xv -= 4; + if (machine().input().code_pressed(KEYCODE_RIGHT) && xv < 4096 - 4) + xv += 4; + + if (machine().input().code_pressed(KEYCODE_UP) && yv >= 4) + yv -= 4; + if (machine().input().code_pressed(KEYCODE_DOWN) && yv < 0x40000) + yv += 4; + + for (y = cliprect.min_y; y <= cliprect.max_y; y++) + { + uint16_t *dest = &bitmap.pix(y); + 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 (m_video_changed) + copybitmap(bitmap, m_poly->screenbits(), 0,1, 0,0, cliprect); + ret = m_video_changed ? 1 : 0; + m_video_changed = false; + } + + return (!ret); +} |