// license:BSD-3-Clause // copyright-holders:David Haywood, Ryan Holtz #include "emu.h" #include "spg_renderer.h" DEFINE_DEVICE_TYPE(SPG_RENDERER, spg_renderer_device, "spg_renderer", "SunPlus SPG2xx video rendering") spg_renderer_device::spg_renderer_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock) { } spg_renderer_device::spg_renderer_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : spg_renderer_device(mconfig, SPG_RENDERER, tag, owner, clock) { } void spg_renderer_device::device_start() { m_rgb555_to_rgb888 = std::make_unique(0x8000); m_rgb555_to_rgb888_current = std::make_unique(0x8000); for (uint8_t i = 0; i < 32; i++) { m_rgb5_to_rgb8[i] = (i << 3) | (i >> 2); } for (uint16_t i = 0; i < 0x8000; i++) { m_rgb555_to_rgb888[i] = (m_rgb5_to_rgb8[(i >> 10) & 0x1f] << 16) | (m_rgb5_to_rgb8[(i >> 5) & 0x1f] << 8) | (m_rgb5_to_rgb8[(i >> 0) & 0x1f] << 0); m_rgb555_to_rgb888_current[i] = 0x0000; } save_item(NAME(m_video_regs_1c)); save_item(NAME(m_video_regs_1d)); save_item(NAME(m_video_regs_1e)); save_item(NAME(m_video_regs_2a)); save_item(NAME(m_video_regs_30)); save_item(NAME(m_video_regs_3c)); save_item(NAME(m_video_regs_42)); save_item(NAME(m_ycmp_table)); save_pointer(NAME(m_rgb555_to_rgb888_current), 0x8000); save_item(NAME(m_brightness_or_saturation_dirty)); } void spg_renderer_device::device_reset() { m_video_regs_1c = 0x0000; m_video_regs_1d = 0x0000; m_video_regs_1e = 0x0000; m_video_regs_2a = 0x0000; m_video_regs_30 = 0x0000; m_video_regs_3c = 0x0020; m_video_regs_42 = 0x0001; for (int i = 0; i < 480; i++) { m_ycmp_table[i] = 0xffffffff; } m_brightness_or_saturation_dirty = true; } // Perform a lerp between a and b inline uint8_t spg_renderer_device::mix_channel(uint8_t bottom, uint8_t top, uint8_t alpha) { return ((0x20 - alpha) * bottom + alpha * top) >> 5; } template void spg_renderer_device::draw_tilestrip(uint32_t screenwidth, uint32_t drawwidthmask, const rectangle &cliprect, uint32_t tile_h, uint32_t tile_w, uint32_t tilegfxdata_addr, uint32_t tile, uint32_t tile_scanline, int drawx, bool flip_y, uint32_t palette_offset, const uint32_t nc_bpp, const uint32_t bits_per_row, const uint32_t words_per_tile, address_space &spc, uint16_t *paletteram, uint8_t blendlevel) { const uint32_t yflipmask = flip_y ? tile_h - 1 : 0; uint32_t m = tilegfxdata_addr + words_per_tile * tile + bits_per_row * (tile_scanline ^ yflipmask); uint32_t bits = 0; uint32_t nbits = 0; for (int32_t x = FlipX ? (tile_w - 1) : 0; FlipX ? x >= 0 : x < tile_w; FlipX ? x-- : x++) { int realdrawpos = (drawx + x) & drawwidthmask; bits <<= nc_bpp; if (nbits < nc_bpp) { uint16_t b = spc.read_word(m++ & 0x3fffff); b = (b << 8) | (b >> 8); bits |= b << (nc_bpp - nbits); nbits += 16; } nbits -= nc_bpp; uint32_t pal = palette_offset + (bits >> 16); bits &= 0xffff; if (realdrawpos >= 0 && realdrawpos < screenwidth) { uint16_t rgb = paletteram[pal]; if (!(rgb & 0x8000)) { if (Blend && !(m_linebuf[realdrawpos] & 0x8000)) { m_linebuf[realdrawpos] = (mix_channel((uint8_t)(m_linebuf[realdrawpos] >> 10) & 0x1f, (rgb >> 10) & 0x1f, blendlevel) << 10) | (mix_channel((uint8_t)(m_linebuf[realdrawpos] >> 5) & 0x1f, (rgb >> 5) & 0x1f, blendlevel) << 5) | (mix_channel((uint8_t)(m_linebuf[realdrawpos] >> 0) & 0x1f, (rgb >> 0) & 0x1f, blendlevel) << 0); } else { m_linebuf[realdrawpos] = rgb; } } } } } void spg_renderer_device::draw_linemap(const rectangle &cliprect, uint32_t scanline, int priority, uint32_t tilegfxdata_addr, uint16_t *scrollregs, uint16_t *tilemapregs, address_space &spc, uint16_t *paletteram) { if ((scanline < 0) || (scanline >= 240)) return; uint32_t tilemap = tilemapregs[2]; uint32_t palette_map = tilemapregs[3]; //if (scanline == 128) // popmessage("draw draw_linemap reg0 %04x reg1 %04x bases %04x %04x\n", tilemapregs[0], tilemapregs[1], tilemap, palette_map); //uint32_t xscroll = scrollregs[0]; uint32_t yscroll = scrollregs[1]; int realline = (scanline + yscroll) & 0xff; uint32_t tile = spc.read_word(tilemap + realline); uint16_t palette = 0; //if (!tile) // continue; palette = spc.read_word(palette_map + realline / 2); if (scanline & 1) palette >>= 8; else palette &= 0x00ff; //const int linewidth = 320 / 2; int sourcebase = tile | (palette << 16); uint32_t ctrl = tilemapregs[1]; if (ctrl & 0x80) // HiColor mode (rad_digi) { for (int i = 0; i < 320; i++) { const uint16_t data = spc.read_word(sourcebase + i); if (!(data & 0x8000)) { m_linebuf[i] = data & 0x7fff; } } } else { const uint32_t attr = tilemapregs[0]; const uint8_t bpp = attr & 0x0003; const uint32_t nc_bpp = ((bpp)+1) << 1; uint32_t palette_offset = (attr & 0x0f00) >> 4; palette_offset >>= nc_bpp; palette_offset <<= nc_bpp; uint32_t bits = 0; uint32_t nbits = 0; for (int i = 0; i < 320; i++) { bits <<= nc_bpp; if (nbits < nc_bpp) { uint16_t b = spc.read_word(sourcebase++ & 0x3fffff); b = (b << 8) | (b >> 8); bits |= b << (nc_bpp - nbits); nbits += 16; } nbits -= nc_bpp; uint32_t pal = palette_offset + (bits >> 16); bits &= 0xffff; uint16_t rgb = paletteram[pal]; if (!(rgb & 0x8000)) { m_linebuf[i] = rgb; } } } } // this builds up a line table for the vcmp effect, this is not correct when step is used void spg_renderer_device::update_vcmp_table() { int currentline = 0; int step = m_video_regs_1e & 0xff; if (step & 0x80) step = step - 0x100; int current_inc_value = (m_video_regs_1c<<4); int counter = 0; for (int i = 0; i < 480; i++) { if (i < m_video_regs_1d) { m_ycmp_table[i] = 0xffffffff; } else { if ((currentline >= 0) && (currentline < 256)) { m_ycmp_table[i] = currentline; } counter += current_inc_value; while (counter >= (0x20<<4)) { currentline++; current_inc_value += step; counter -= (0x20<<4); } } } } void spg_renderer_device::draw_tilestrip(uint32_t screenwidth, uint32_t drawwidthmask, bool blend, bool flip_x, const rectangle &cliprect, uint32_t tile_h, uint32_t tile_w, uint32_t tilegfxdata_addr, uint32_t tile, uint32_t tile_scanline, int drawx, bool flip_y, uint32_t palette_offset, const uint32_t nc_bpp, const uint32_t bits_per_row, const uint32_t words_per_tile, address_space &spc, uint16_t *paletteram, uint8_t blendlevel) { if (blend) { if (flip_x) { draw_tilestrip(screenwidth, drawwidthmask, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, tile_scanline, drawx, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } else { draw_tilestrip(screenwidth, drawwidthmask, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, tile_scanline, drawx, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } } else { if (flip_x) { draw_tilestrip(screenwidth, drawwidthmask, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, tile_scanline, drawx, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } else { draw_tilestrip(screenwidth, drawwidthmask, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, tile_scanline, drawx, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } } } void spg_renderer_device::draw_page(const rectangle &cliprect, uint32_t scanline, int priority, uint16_t tilegfxdata_addr, uint16_t *scrollregs, uint16_t *tilemapregs, address_space &spc, uint16_t *paletteram, uint16_t *scrollram, uint32_t which) { const uint32_t attr = tilemapregs[0]; const uint32_t ctrl = tilemapregs[1]; if (!(ctrl & 0x0008)) { return; } if (((attr & 0x3000) >> 12) != priority) { return; } // graphic data segments/bases uint32_t tilegfxdata_addr_full = tilegfxdata_addr * 0x40; if (ctrl & 0x0001) // Bitmap / Linemap mode! (basically screen width tile mode) { draw_linemap(cliprect, scanline, priority, tilegfxdata_addr_full, scrollregs, tilemapregs, spc, paletteram); return; } uint32_t logical_scanline = scanline; if (ctrl & 0x0040) // 'vertical compression feature' (later models only?) { // used by senspeed //if (m_video_regs_1e != 0x0000) // popmessage("vertical compression mode with non-0 step amount %04x offset %04x step %04x\n", m_video_regs_1c, m_video_regs_1d, m_video_regs_1e); logical_scanline = m_ycmp_table[scanline]; if (logical_scanline == 0xffffffff) return; } const uint32_t total_width = 512; uint32_t y_mask = 0x100; const uint32_t screenwidth = 320; const uint32_t drawwidthmask = total_width - 1; y_mask--; // turn into actual mask const uint32_t xscroll = scrollregs[0]; const uint32_t yscroll = scrollregs[1]; const uint32_t tilemap_rambase = tilemapregs[2]; const uint32_t exattributemap_rambase = tilemapregs[3]; const int tile_width = (attr & 0x0030) >> 4; const uint32_t tile_h = 8 << ((attr & 0x00c0) >> 6); const uint32_t tile_w = 8 << (tile_width); const uint32_t tile_count_x = total_width / tile_w; // tilemaps are 512 or 1024 wide depending on screen mode? const uint32_t bitmap_y = (logical_scanline + yscroll) & y_mask; // tilemaps are 256 or 512 high depending on screen mode? const uint32_t y0 = bitmap_y / tile_h; const uint32_t tile_scanline = bitmap_y % tile_h; const uint8_t bpp = attr & 0x0003; const uint32_t nc_bpp = ((bpp)+1) << 1; const uint32_t bits_per_row = nc_bpp * tile_w / 16; const bool row_scroll = (ctrl & 0x0010); // Max blend level (3) should result in 100% opacity, per docs // Min blend level (0) should result in 25% opacity, per docs static const uint8_t s_blend_levels[4] = { 0x08, 0x10, 0x18, 0x20 }; const uint8_t blendlevel = s_blend_levels[m_video_regs_2a & 3]; const uint32_t words_per_tile = bits_per_row * tile_h; int realxscroll = xscroll; // Tennis in My Wireless Sports confirms the need to add the scroll value here rather than rowscroll being screen-aligned // this is different to GPL? if (row_scroll) realxscroll += (int16_t)scrollram[(logical_scanline + yscroll) & 0xff]; const int upperscrollbits = (realxscroll >> (tile_width + 3)); const int endpos = (screenwidth + tile_w) / tile_w; for (uint32_t x0 = 0; x0 < endpos; x0++) { bool blend; bool flip_x; bool flip_y; uint32_t tile; uint32_t palette_offset; // get tile info const int realx0 = (x0 + upperscrollbits) & (tile_count_x - 1); uint32_t tile_address = realx0 + (tile_count_x * y0); tile = (ctrl & 0x0004) ? spc.read_word(tilemap_rambase) : spc.read_word(tilemap_rambase + tile_address); if (!tile) continue; uint32_t tileattr = attr; uint32_t tilectrl = ctrl; if ((tilectrl & 2) == 0) { // -(1) bld(1) flip(2) pal(4) uint16_t exattribute = (tilectrl & 0x0004) ? spc.read_word(exattributemap_rambase) : spc.read_word(exattributemap_rambase + tile_address / 2); if (realx0 & 1) exattribute >>= 8; else exattribute &= 0x00ff; tileattr &= ~0x000c; tileattr |= (exattribute >> 2) & 0x000c; // flip tileattr &= ~0x0f00; tileattr |= (exattribute << 8) & 0x0f00; // palette tilectrl &= ~0x0100; tilectrl |= (exattribute << 2) & 0x0100; // blend } blend = (tilectrl & 0x0100) ? true : false; flip_x = (tileattr & 0x0004) ? true : false; flip_y = (tileattr & 0x0008) ? true : false; palette_offset = (tileattr & 0x0f00) >> 4; // got tile info palette_offset >>= nc_bpp; palette_offset <<= nc_bpp; const int drawx = (x0 * tile_w) - (realxscroll & (tile_w - 1)); draw_tilestrip(screenwidth, drawwidthmask, blend, flip_x, cliprect, tile_h, tile_w, tilegfxdata_addr_full, tile, tile_scanline, drawx, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } } void spg_renderer_device::draw_sprite(const rectangle &cliprect, uint32_t scanline, int priority, uint32_t spritegfxdata_addr, uint32_t base_addr, address_space &spc, uint16_t *paletteram, uint16_t *spriteram) { uint32_t tilegfxdata_addr = spritegfxdata_addr; uint32_t tile = spriteram[base_addr + 0]; int16_t x = spriteram[base_addr + 1]; int16_t y = spriteram[base_addr + 2]; uint16_t attr = spriteram[base_addr + 3]; if (!tile) { return; } if (((attr & 0x3000) >> 12) != priority) { return; } const uint32_t screenwidth = 320; const uint32_t screenheight = 256; const uint32_t xmask = 0x1ff; const uint32_t ymask = 0x1ff; const uint32_t tile_h = 8 << ((attr & 0x00c0) >> 6); const uint32_t tile_w = 8 << ((attr & 0x0030) >> 4); // TODO: not all SPG2xx models support this, check which ones do if (!(m_video_regs_42 & 0x0002)) { x = ((screenwidth/2) + x) - tile_w / 2; y = ((screenheight/2) - y) - (tile_h / 2); } x &= xmask; y &= ymask; int firstline = y; int lastline = y + (tile_h - 1); lastline &= ymask; const bool blend = (attr & 0x4000) ? true : false; bool flip_x = (attr & 0x0004) ? true : false; bool flip_y = (attr & 0x0008) ? true : false; const uint8_t bpp = attr & 0x0003; const uint32_t nc_bpp = ((bpp)+1) << 1; const uint32_t bits_per_row = nc_bpp * tile_w / 16; // Max blend level (3) should result in 100% opacity on the sprite, per docs // Min blend level (0) should result in 25% opacity on the sprite, per docs static const uint8_t s_blend_levels[4] = { 0x08, 0x10, 0x18, 0x20 }; uint8_t blendlevel = s_blend_levels[m_video_regs_2a & 3]; uint32_t words_per_tile = bits_per_row * tile_h; uint32_t palette_offset = (attr & 0x0f00) >> 4; // the Circuit Racing game in PDC100 needs this or some graphics have bad colours at the edges when turning as it leaves stray lower bits set palette_offset >>= nc_bpp; palette_offset <<= nc_bpp; if (firstline < lastline) { int scanx = scanline - firstline; if ((scanx >= 0) && (scanline <= lastline)) { draw_tilestrip(screenwidth, xmask, blend, flip_x, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, scanx, x, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } } else { // clipped from top int tempfirstline = firstline - (screenheight<<1); int templastline = lastline; int scanx = scanline - tempfirstline; if ((scanx >= 0) && (scanline <= templastline)) { draw_tilestrip(screenwidth, xmask, blend, flip_x, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, scanx, x, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } // clipped against the bottom tempfirstline = firstline; templastline = lastline + (screenheight<<1); scanx = scanline - tempfirstline; if ((scanx >= 0) && (scanline <= templastline)) { draw_tilestrip(screenwidth, xmask, blend, flip_x, cliprect, tile_h, tile_w, tilegfxdata_addr, tile, scanx, x, flip_y, palette_offset, nc_bpp, bits_per_row, words_per_tile, spc, paletteram, blendlevel); } } } void spg_renderer_device::draw_sprites(const rectangle &cliprect, uint32_t scanline, int priority, uint32_t spritegfxdata_addr, address_space &spc, uint16_t *paletteram, uint16_t *spriteram, int sprlimit) { if (!(m_video_regs_42 & 0x0001)) return; for (uint32_t n = 0; n < sprlimit; n++) { draw_sprite(cliprect, scanline, priority, spritegfxdata_addr, 4 * n, spc, paletteram, spriteram); } } void spg_renderer_device::new_line(const rectangle &cliprect) { update_palette_lookup(); for (int x = cliprect.min_x; x <= cliprect.max_x; x++) { m_linebuf[x] = 0x8000; // transparent } } void spg_renderer_device::update_palette_lookup() { if (!m_brightness_or_saturation_dirty) return; static const float s_u8_to_float = 1.0f / 255.0f; static const float s_gray_r = 0.299f; static const float s_gray_g = 0.587f; static const float s_gray_b = 0.114f; const float sat_adjust = (0xff - (m_video_regs_3c & 0x00ff)) / (float)(0xff - 0x20); const uint16_t fade_offset = m_video_regs_30; for (uint16_t i = 0; i < 0x8000; i++) { uint32_t src = m_rgb555_to_rgb888[i]; if ((m_video_regs_3c & 0x00ff) != 0x0020) // apply saturation { const uint32_t src_rgb = src; const float src_r = (uint8_t)(src_rgb >> 16) * s_u8_to_float; const float src_g = (uint8_t)(src_rgb >> 8) * s_u8_to_float; const float src_b = (uint8_t)(src_rgb >> 0) * s_u8_to_float; const float luma = src_r * s_gray_r + src_g * s_gray_g + src_b * s_gray_b; const float adjusted_r = luma + (src_r - luma) * sat_adjust; const float adjusted_g = luma + (src_g - luma) * sat_adjust; const float adjusted_b = luma + (src_b - luma) * sat_adjust; const int integer_r = (int)floor(adjusted_r * 255.0f); const int integer_g = (int)floor(adjusted_g * 255.0f); const int integer_b = (int)floor(adjusted_b * 255.0f); src = (integer_r > 255 ? 0xff0000 : (integer_r < 0 ? 0 : ((uint8_t)integer_r << 16))) | (integer_g > 255 ? 0x00ff00 : (integer_g < 0 ? 0 : ((uint8_t)integer_g << 8))) | (integer_b > 255 ? 0x0000ff : (integer_b < 0 ? 0 : (uint8_t)integer_b)); } if (fade_offset != 0) // apply fade { const uint32_t src_rgb = src; const uint8_t src_r = (src_rgb >> 16) & 0xff; const uint8_t src_g = (src_rgb >> 8) & 0xff; const uint8_t src_b = (src_rgb >> 0) & 0xff; const uint8_t r = src_r - fade_offset; const uint8_t g = src_g - fade_offset; const uint8_t b = src_b - fade_offset; src = (r > src_r ? 0 : (r << 16)) | (g > src_g ? 0 : (g << 8)) | (b > src_b ? 0 : (b << 0)); } m_rgb555_to_rgb888_current[i] = src; } m_brightness_or_saturation_dirty = false; } void spg_renderer_device::apply_saturation_and_fade(bitmap_rgb32 &bitmap, const rectangle &cliprect, int scanline) { uint32_t *src = &bitmap.pix(scanline, cliprect.min_x); for (int x = cliprect.min_x; x <= cliprect.max_x; x++) { uint16_t px = (m_linebuf[x] & 0x8000) ? 0x0 : m_linebuf[x]; *src = m_rgb555_to_rgb888_current[px]; src++; } }