mirror of https://github.com/bsnes-emu/bsnes.git
Update to v082r07 release.
byuu says: Wrote a cycle-based PPU renderer, ~95% hardware accurate for BGs, not so much for sprites yet. Mednafen has been helping out a lot.
This commit is contained in:
Tim Allen
parent
4ca051a22f
commit
7fc78dae07
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@ -124,7 +124,7 @@ void CPU::write(uint16 addr, uint8 data) {
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void CPU::oam_dma(uint16 addr) {
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op_readpc();
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for(unsigned n = 0; n < 256; n++) {
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uint8 data = bus.read(addr + n);
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uint8 data = op_read(addr + n);
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op_write(0x2004, data);
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}
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}
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@ -4,7 +4,7 @@
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namespace NES {
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namespace Info {
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static const char Name[] = "bnes";
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static const char Version[] = "000.02";
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static const char Version[] = "000.03";
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}
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}
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@ -9,53 +9,42 @@ void PPU::Main() {
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}
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void PPU::main() {
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unsigned x = 0, y = 0;
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while(true) {
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add_clocks(4);
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raster_scanline();
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}
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}
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status.lx++;
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if(status.ly >= 0 && status.ly <= 239) {
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if(status.lx == 257) {
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if(raster_enable()) {
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status.vaddr = (status.vaddr & 0x7be0) | (status.taddr & 0x041f);
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}
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}
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}
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if(status.ly == 261 && status.lx == 304) {
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if(raster_enable()) {
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status.vaddr = status.taddr;
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}
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}
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if(status.lx == 341) {
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void PPU::tick() {
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if(++status.lx == 341) {
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status.lx = 0;
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status.ly++;
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if(status.ly == 262) {
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scanline_edge();
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if(++status.ly == 262) {
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status.ly = 0;
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frame_edge();
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}
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}
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clock += 4;
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if(clock >= 0) co_switch(cpu.thread);
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}
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void PPU::tick(unsigned cycles) {
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while(cycles--) tick();
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}
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void PPU::scanline_edge() {
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if(status.ly == 241) {
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status.nmi = 1;
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if(status.nmi_enable) cpu.status.nmi_line = true;
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}
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}
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void PPU::frame_edge() {
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status.field ^= 1;
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status.nmi = 0;
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status.sprite_zero_hit = 0;
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system.interface->video_refresh(buffer);
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scheduler.exit();
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}
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if(status.ly >= 0 && status.ly <= 239) {
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render_scanline();
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}
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if(status.ly == 240) {
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status.nmi = 1;
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if(status.nmi_enable) cpu.status.nmi_line = true;
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}
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}
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}
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}
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void PPU::add_clocks(unsigned clocks) {
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clock += clocks;
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if(clock >= 0) co_switch(cpu.thread);
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}
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void PPU::power() {
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@ -85,6 +74,7 @@ void PPU::reset() {
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create(PPU::Main, 21477272);
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status.mdr = 0x00;
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status.field = 0;
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status.ly = 0;
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status.lx = 0;
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status.bus_data = 0x00;
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@ -140,7 +130,8 @@ uint8 PPU::read(uint16 addr) {
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status.address_latch = 0;
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break;
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case 4: //OAMDATA
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result = oam[status.oam_addr++];
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result = oam[status.oam_addr];
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if((status.oam_addr & 3) == 3) result &= 0xe3;
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break;
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case 7: //PPUDATA
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if(addr >= 0x3f00) {
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@ -230,6 +221,21 @@ void PPU::cgram_write(uint16 addr, uint8 data) {
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cgram[addr & 0x1f] = data;
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}
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uint8 PPU::bus_read(uint16 addr) {
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uint8 data = cartridge.chr_read(addr);
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tick(2);
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return data;
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}
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//
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//vaddr = 0yyy VHYY YYYX XXXX
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//yyy = fine Yscroll (y:d0-d2)
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//V = V nametable (y:d8)
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//H = H nametable (x:d8)
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//YYYYY = Y nametable (y:d3-d7)
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//XXXXX = X nametable (x:d3-d7)
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bool PPU::raster_enable() const {
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return status.bg_enable || status.sprite_enable;
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}
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@ -246,7 +252,181 @@ unsigned PPU::scrolly() const {
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return (((status.vaddr >> 5) & 0x1f) << 3) | ((status.vaddr >> 12) & 7);
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}
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void PPU::render_scanline() {
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//
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void PPU::scrollx_increment() {
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status.vaddr = (status.vaddr & 0x7fe0) | ((status.vaddr + 0x0001) & 0x001f);
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if((status.vaddr & 0x001f) == 0x0000) {
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status.vaddr ^= 0x0400;
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}
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}
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void PPU::scrolly_increment() {
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status.vaddr = (status.vaddr & 0x0fff) | ((status.vaddr + 0x1000) & 0x7000);
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if((status.vaddr & 0x7000) == 0x0000) {
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status.vaddr = (status.vaddr & 0x7c1f) | ((status.vaddr + 0x0020) & 0x03e0);
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if((status.vaddr & 0x03e0) == 0x03c0) { //0x03c0 == 30 << 5; 30 * 8 = 240
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status.vaddr &= 0x7c1f;
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status.vaddr ^= 0x0800;
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}
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}
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}
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#if 1
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void PPU::raster_scanline() {
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if((status.ly >= 240 && status.ly <= 260)) {
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return tick(341);
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}
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uint32 *output = buffer + status.ly * 256;
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signed lx = 0, ly = (status.ly == 261 ? -1 : status.ly);
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if(raster_enable() == false) {
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while(lx < 256) output[lx++] = paletteRGB[cgram[0]];
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tick(341);
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return;
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}
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for(unsigned tile = 0; tile < 32; tile++) { // 0-255
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unsigned mask = 0x8000 >> status.xaddr;
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for(unsigned n = 0; n < 8; n++) {
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uint8 palette = 0;
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palette |= (raster.tiledatalo & mask) ? 1 : 0;
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palette |= (raster.tiledatahi & mask) ? 2 : 0;
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if(palette) {
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unsigned attr = raster.attribute;
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if(mask >= 256) attr >>= 2;
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palette |= (attr & 3) << 2;
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}
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mask >>= 1;
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if(status.bg_edge_enable == false && lx < 8) palette = 0;
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for(unsigned sprite = 0; sprite < 8; sprite++) {
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if(status.sprite_edge_enable == false && lx < 8) continue;
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if(raster.oam[sprite].id == 64) continue;
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unsigned spritex = lx - raster.oam[sprite].x;
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if(spritex >= 8) continue;
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if(raster.oam[sprite].attr & 0x40) spritex ^= 7;
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unsigned mask = 0x80 >> spritex;
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unsigned sprite_palette = 0;
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sprite_palette |= (raster.oam[sprite].tiledatalo & mask) ? 1 : 0;
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sprite_palette |= (raster.oam[sprite].tiledatahi & mask) ? 2 : 0;
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if(sprite_palette == 0) continue;
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if(raster.oam[sprite].id == 0) status.sprite_zero_hit = 1;
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sprite_palette |= (raster.oam[sprite].attr & 3) << 2;
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if((raster.oam[sprite].attr & 0x20) == 0 || palette == 0) {
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palette = 16 + sprite_palette;
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break;
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}
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}
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output[lx++] = paletteRGB[cgram[palette]];
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}
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unsigned nametable = bus_read(0x2000 | (status.vaddr & 0x1fff));
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unsigned attribute = bus_read(0x23c0 | (status.vaddr & 0x0fc0) | ((scrolly() >> 5) << 3) | (scrollx() >> 5));
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if(scrolly() & 16) attribute >>= 4;
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if(scrollx() & 16) attribute >>= 2;
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unsigned addr = status.bg_addr + (nametable << 4) + (scrolly() & 7);
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scrollx_increment();
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if(tile == 31) scrolly_increment();
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unsigned tiledatalo = bus_read(addr + 0);
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unsigned tiledatahi = bus_read(addr + 8);
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raster.nametable = (raster.nametable << 8) | nametable;
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raster.attribute = (raster.attribute << 2) | (attribute & 3);
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raster.tiledatalo = (raster.tiledatalo << 8) | tiledatalo;
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raster.tiledatahi = (raster.tiledatahi << 8) | tiledatahi;
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}
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for(unsigned n = 0; n < 8; n++) {
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raster.oam[n].id = 64;
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raster.oam[n].tiledatalo = 0;
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raster.oam[n].tiledatahi = 0;
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}
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//should occur every 4 cycles during main screen rendering
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unsigned counter = 0;
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unsigned sprite_height = status.sprite_size ? 16 : 8;
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if(status.sprite_enable) for(unsigned n = 0; n < 64; n++) {
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unsigned y = ly - oam[(n * 4) + 0];
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if(y >= sprite_height) continue;
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if(counter == 8) {
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status.sprite_overflow = 1;
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break;
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}
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raster.oam[counter].id = n;
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raster.oam[counter].y = y;
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raster.oam[counter].tile = oam[(n * 4) + 1];
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raster.oam[counter].attr = oam[(n * 4) + 2];
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raster.oam[counter].x = oam[(n * 4) + 3];
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counter++;
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}
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for(unsigned sprite = 0; sprite < 8; sprite++) { //256-319
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unsigned nametable = bus_read(0x2000 | (status.vaddr & 0x1fff));
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if(sprite == 0) status.vaddr = (status.vaddr & 0x7be0) | (status.taddr & 0x041f); //257
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unsigned attribute = bus_read(0x23c0 | (status.vaddr & 0x0fc0) | ((scrolly() >> 5) << 3) | (scrollx() >> 5));
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unsigned addr = (sprite_height == 8)
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? status.sprite_addr + raster.oam[sprite].tile * 16
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: ((raster.oam[sprite].tile & ~1) * 16) + ((raster.oam[sprite].tile & 1) * 0x1000);
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unsigned spritey = raster.oam[sprite].y;
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if(raster.oam[sprite].attr & 0x80) spritey ^= (sprite_height - 1);
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if(spritey & 8) spritey += 8;
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raster.oam[sprite].tiledatalo = bus_read(addr + spritey + 0);
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raster.oam[sprite].tiledatahi = bus_read(addr + spritey + 8);
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if(sprite == 6 && status.ly == 261) status.vaddr = status.taddr; //304
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}
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for(unsigned tile = 0; tile < 2; tile++) { //320-335
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unsigned nametable = bus_read(0x2000 | (status.vaddr & 0x1fff));
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unsigned attribute = bus_read(0x23c0 | (status.vaddr & 0x0fc0) | ((scrolly() >> 5) << 3) | (scrollx() >> 5));
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if(scrolly() & 16) attribute >>= 4;
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if(scrollx() & 16) attribute >>= 2;
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unsigned addr = status.bg_addr + (nametable << 4) + (scrolly() & 7);
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scrollx_increment();
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unsigned tiledatalo = bus_read(addr + 0);
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unsigned tiledatahi = bus_read(addr + 8);
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raster.nametable = (raster.nametable << 8) | nametable;
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raster.attribute = (raster.attribute << 2) | (attribute & 3);
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raster.tiledatalo = (raster.tiledatalo << 8) | tiledatalo;
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raster.tiledatahi = (raster.tiledatahi << 8) | tiledatahi;
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}
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//336-339
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unsigned nametable = bus_read(0x2000 | (status.vaddr & 0x1fff));
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unsigned attribute = bus_read(0x23c0 | (status.vaddr & 0x0fc0) | ((scrolly() >> 5) << 3) | (scrollx() >> 5));
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//340
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tick();
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}
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#else
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void PPU::raster_scanline() {
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if(raster_enable() == false || (status.ly >= 240 && status.ly <= 260)) {
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return tick(341);
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}
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uint32 *line = buffer + status.ly * 256;
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uint8 ioam[8][5];
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@ -265,30 +445,18 @@ void PPU::render_scanline() {
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}
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for(unsigned x = 0; x < 256; x++) {
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unsigned offsetx = x + scrollx();
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unsigned offsety = status.ly + (scrolly() < 240 ? scrolly() : 240 - scrolly());
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uint8 tile = cartridge.chr_read(0x2000 | (status.vaddr & 0x1fff));
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uint8 attr = cartridge.chr_read(0x23c0 | (status.vaddr & 0x0fc0) | ((scrolly() >> 5) << 3) | (scrollx() >> 5));
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//if(x==0&&status.ly==64) print("Y=", offsety, "\n");
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if(scrollx() & 16) attr >>= 2;
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if(scrolly() & 16) attr >>= 4;
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bool screenx = offsetx & 256;
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bool screeny = offsety & 256;
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unsigned tilex = (scrollx() + x) & 7;
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offsetx &= 255;
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offsety &= 255;
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uint8 tdlo = cartridge.chr_read(status.bg_addr + (tile << 4) + 0 + (scrolly() & 7));
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uint8 tdhi = cartridge.chr_read(status.bg_addr + (tile << 4) + 8 + (scrolly() & 7));
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unsigned base = nametable_addr() + (screenx * 0x0400) + (screeny * 0x0800);
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uint8 tile = cartridge.chr_read(base + (offsety / 8) * 32 + (offsetx / 8));
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uint8 attr = cartridge.chr_read(base + 0x03c0 + (offsety / 32) * 8 + (offsetx / 32));
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if((offsety / 16) & 1) attr >>= 4;
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if((offsetx / 16) & 1) attr >>= 2;
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unsigned tilex = offsetx & 7;
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unsigned tiley = offsety & 7;
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uint8 tdlo = cartridge.chr_read(status.bg_addr + tile * 16 + 0 + tiley);
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uint8 tdhi = cartridge.chr_read(status.bg_addr + tile * 16 + 8 + tiley);
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if(tilex == 7) scrollx_increment();
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unsigned mask = 0x80 >> tilex;
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unsigned palette = 0;
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@ -335,6 +503,21 @@ void PPU::render_scanline() {
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*line++ = paletteRGB[cgram[palette]];
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}
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if(status.ly != 261) scrolly_increment();
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tick(257); //257
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if(raster_enable()) {
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status.vaddr = (status.vaddr & 0x7be0) | (status.taddr & 0x041f);
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}
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tick(47); //304
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if(status.ly == 261) status.vaddr = status.taddr;
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tick(37); //341
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}
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#endif
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}
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@ -1,7 +1,11 @@
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struct PPU : Processor {
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static void Main();
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void main();
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void add_clocks(unsigned clocks);
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void tick();
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void tick(unsigned cycles);
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void scanline_edge();
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void frame_edge();
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void power();
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void reset();
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@ -15,16 +19,22 @@ struct PPU : Processor {
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uint8 cgram_read(uint16 addr);
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void cgram_write(uint16 addr, uint8 data);
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void render_scanline();
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uint8 bus_read(uint16 addr);
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bool raster_enable() const;
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unsigned nametable_addr() const;
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unsigned scrollx() const;
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unsigned scrolly() const;
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void scrollx_increment();
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void scrolly_increment();
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void raster_scanline();
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struct Status {
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uint8 mdr;
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bool field;
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unsigned ly;
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unsigned lx;
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@ -63,7 +73,25 @@ struct PPU : Processor {
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uint8 oam_addr;
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} status;
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uint32 buffer[256 * 240];
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struct Raster {
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uint16 nametable;
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uint16 attribute;
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uint16 tiledatalo;
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uint16 tiledatahi;
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struct OAM {
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uint8 id;
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uint8 y;
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uint8 tile;
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uint8 attr;
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uint8 x;
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uint8 tiledatalo;
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uint8 tiledatahi;
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} oam[8];
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} raster;
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uint32 buffer[256 * 262];
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uint32 paletteRGB[64];
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uint8 ciram[2048];
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uint8 cgram[32];
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@ -4,7 +4,7 @@
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namespace SNES {
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namespace Info {
|
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static const char Name[] = "bsnes";
|
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static const char Version[] = "082.06";
|
||||
static const char Version[] = "082.07";
|
||||
static const unsigned SerializerVersion = 21;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -53,6 +53,9 @@ void Utility::resizeMainWindow(bool shrink) {
|
|||
height = height * maxM;
|
||||
|
||||
if(shrink == false) {
|
||||
if(geometry.width < width ) width = geometry.width;
|
||||
if(geometry.height < height) height = geometry.height;
|
||||
|
||||
mainWindow->viewport.setGeometry({
|
||||
(geometry.width - width) / 2, (geometry.height - height) / 2,
|
||||
width, height
|
||||
|
|
|
|||
Loading…
Reference in New Issue