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d5af9fe98ab96af7eb26bd5a21e13cebbbd5faa5
ComSquare/sources/PPU/PPU.cpp
Clément Le Bihan d5af9fe98a starting implementing bg scroll
2021-02-04 19:06:54 +01:00

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//
// Created by cbihan on 1/27/20.
//
#include <iostream>
#include <bitset>
#include "PPU.hpp"
#include "PPUUtils.hpp"
#include "../Exceptions/NotImplementedException.hpp"
#include "../Exceptions/InvalidAddress.hpp"
#include "../Ram/Ram.hpp"
#include "../Models/Vector2.hpp"
#include <random>
namespace ComSquare::PPU
{
PPU::PPU(Renderer::IRenderer &renderer):
vram(new Ram::Ram(VRAMSIZE, ComSquare::VRam, "VRAM")),
oamram(new Ram::Ram(OAMRAMSIZE, ComSquare::OAMRam, "OAMRAM")),
cgram(new Ram::Ram(CGRAMSIZE, ComSquare::CGRam, "CGRAM")),
_renderer(renderer),
_backgrounds{
Background(*this, 1, false),
Background(*this, 1, true),
Background(*this, 2, false),
Background(*this, 2, true),
Background(*this, 3, false),
Background(*this, 3, true),
Background(*this, 4, false),
Background(*this, 4, true)
}
{
this->_registers._isLowByte = true;
/*for (int i = 0; i < 512; i++) {
this->cgram->write_internal(i, random() % 255);
}*/
//colors for the cgram
this->cgram->write_internal(2, 0xE0);
this->cgram->write_internal(3, 0x7F);
this->cgram->write_internal(4, 0x1F); // 0x1F
this->cgram->write_internal(6, 0xFF);
this->cgram->write_internal(7, 0x03);
this->cgram->write_internal(66, 0xE0);
this->cgram->write_internal(67, 0x7F);
//tiles
int vram_test[] = {
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,
0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,
03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0xff,0xff,0xff,0xff,
0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xff,0xff,0xff,0xff,
00,0xc0,0x00,0xe0,0x00,0x70,0x00,0x38,0x00,0x1c,0x00,0x0e,0x00,0x07,0x00,0x03,
00,0x03,0x00,0x07,0x00,0x0e,0x00,0x1c,0x00,0x38,0x00,0x70,0x00,0xe0,0x00,0xc0,
00,0x07,0x00,0x0f,0x00,0x18,0x00,0x30,0x00,0x60,0x00,0xc0,0x00,0xc0,0x00,0xc0,
00,0xe0,0x00,0xf0,0x00,0x18,0x00,0x0c,0x00,0x06,0x00,0x03,0x00,0x03,0x00,0x03,
0xfc,0x00,0xf8,0x00,0xf0,0x00,0xe0,0x00,0xc0,0x00,0x80,0x00,0x00,0x00,0x00,0x00,
0x3f,0x00,0x1f,0x00,0x0f,0x00,0x07,0x00,0x03,0x00,0x01,0x00,0x00,0x00,0x00,0x00,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,
0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,
0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xff,0xff,0xff,0xff,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,
0xff,0xff,0xff,0xff,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,0xc0,
00,0x03,0x00,0x07,0x00,0x0e,0x00,0x1c,0x00,0x38,0x00,0x70,0x00,0xe0,0x00,0xc0,
00,0xc0,0x00,0xe0,0x00,0x70,0x00,0x38,0x00,0x1c,0x00,0x0e,0x00,0x07,0x00,0x03,
00,0xc0,0x00,0xc0,0x00,0xc0,0x00,0x60,0x00,0x30,0x00,0x18,0x00,0x0f,0x00,0x07,
00,0x03,0x00,0x03,0x00,0x03,0x00,0x06,0x00,0x0c,0x00,0x18,0x00,0xf0,0x00,0xe0,
00,0x00,0x00,0x00,0x80,0x00,0xc0,0x00,0xe0,0x00,0xf0,0x00,0xf8,0x00,0xfc,0x00,
00,0x00,0x00,0x00,0x01,0x00,0x03,0x00,0x07,0x00,0x0f,00,0x1f,00,0x3f,00, -1
};
/* int *cgram_test = get_dump_cgram();
for (int i = 0; cgram_test[i] != -1; i++) {
this->cgram->write_internal(i, cgram_test[i]);
}
int *vram_test = get_dump_vram();*/
for (int i = 0; vram_test[i] != -1; i++) {
this->vram->write_internal(i, vram_test[i]);
}
int vram_test_2[] = {8, 00, 02, 00, 0x0A, 00, 02, 00, 0x0A, 00, 00, 00, 00, 00, 00, -1};
for (int i = 0; vram_test_2[i] != -1; i++) {
this->vram->write_internal(i + 0x8000, vram_test_2[i]);
}
int vram_test_3[] = {8, 00, 02, 00, 0x8, 00, 02, 00, 0x8, 00, 00, 00, 00, 00, 00, -1};
for (int i = 0; vram_test_3[i] != -1; i++) {
this->vram->write_internal(i + 0x8080, vram_test_3[i]);
}
int vram_test_4[] = {8, 00, 02, 00, 0x0A, 00, 02, 00, 0x0A, 00, 00, 00, 00, 00, 00, -1};
for (int i = 0; vram_test_4[i] != -1; i++) {
this->vram->write_internal(i + 0x8100, vram_test_4[i]);
}
this->vram->write_internal(0x8040, 04);
this->vram->write_internal(0x8042, 06);
this->vram->write_internal(0x8044, 04);
this->vram->write_internal(0x8046, 06);
this->vram->write_internal(0x8048, 04);
this->vram->write_internal(0x80C0, 04);
this->vram->write_internal(0x80C2, 06);
this->vram->write_internal(0x80C4, 04);
this->vram->write_internal(0x80C6, 06);
this->vram->write_internal(0x80C8, 04);
this->vram->write_internal(0xC000, 0x0C);
//registers tic tac toe
this->_registers._bgmode.bgMode = 0;
this->_backgrounds[0].setBpp(this->getBPP(1));
this->_backgrounds[1].setBpp(this->getBPP(1));
this->_backgrounds[2].setBpp(this->getBPP(2));
this->_backgrounds[3].setBpp(this->getBPP(2));
this->_backgrounds[4].setBpp(this->getBPP(3));
this->_backgrounds[5].setBpp(this->getBPP(3));
this->_backgrounds[6].setBpp(this->getBPP(4));
this->_backgrounds[7].setBpp(this->getBPP(4));
this->_registers._bgmode.characterSizeBg1 = true;
this->_registers._bgmode.characterSizeBg2 = true;
this->_backgrounds[0].setCharacterSize(this->getCharacterSize(1));
this->_backgrounds[1].setCharacterSize(this->getCharacterSize(1));
this->_backgrounds[2].setCharacterSize(this->getCharacterSize(2));
this->_backgrounds[3].setCharacterSize(this->getCharacterSize(2));
this->_backgrounds[4].setCharacterSize(this->getCharacterSize(3));
this->_backgrounds[5].setCharacterSize(this->getCharacterSize(3));
this->_backgrounds[6].setCharacterSize(this->getCharacterSize(4));
this->_backgrounds[7].setCharacterSize(this->getCharacterSize(4));
this->_registers._bgsc[0].tilemapAddress = 0x4000 >> 10U;
this->_registers._bgsc[1].tilemapAddress = 0x6000 >> 10U;
this->_backgrounds[0].setTileMapStartAddress(this->getTileMapStartAddress(1));
this->_backgrounds[1].setTileMapStartAddress(this->getTileMapStartAddress(1));
this->_backgrounds[2].setTileMapStartAddress(this->getTileMapStartAddress(2));
this->_backgrounds[3].setTileMapStartAddress(this->getTileMapStartAddress(2));
//this->_registers._bgofs[2].raw = 0x03E0;
//this->_registers._bgofs[3].raw = 0x03DF;
this->_registers._t[0].enableWindowDisplayBg1 = true;
this->_registers._t[0].enableWindowDisplayBg2 = true;
//registers
/* this->_registers._bgmode.bgMode = 1;
this->_backgrounds[0].setBpp(this->getBPP(1));
this->_backgrounds[1].setBpp(this->getBPP(1));
this->_backgrounds[2].setBpp(this->getBPP(2));
this->_backgrounds[3].setBpp(this->getBPP(2));
this->_backgrounds[4].setBpp(this->getBPP(3));
this->_backgrounds[5].setBpp(this->getBPP(3));
//this->_registers._bgmode.characterSizeBg1 = false;
//this->_registers._bgmode.characterSizeBg2 = false;
this->_registers._bgmode.mode1Bg3PriorityBit = true;
this->_backgrounds[0].setCharacterSize(this->getCharacterSize(1));
this->_backgrounds[1].setCharacterSize(this->getCharacterSize(1));
this->_backgrounds[2].setCharacterSize(this->getCharacterSize(2));
this->_backgrounds[3].setCharacterSize(this->getCharacterSize(2));
this->_registers._bgsc[0].tilemapAddress = 0x4800U >> 10U; // 0x4800
this->_registers._bgsc[0].tilemapHorizontalMirroring = 1;
this->_registers._bgsc[1].tilemapAddress = 0x4000U >> 10U; // 0x4000
this->_registers._bgsc[1].tilemapHorizontalMirroring = 1;
this->_registers._bgsc[2].tilemapAddress = 0x5C00U >> 10U;
this->_backgrounds[0].setTileMapStartAddress(this->getTileMapStartAddress(1));
this->_backgrounds[0].setTilemaps(this->getBackgroundSize(1));
this->_backgrounds[1].setTileMapStartAddress(this->getTileMapStartAddress(1));
this->_backgrounds[1].setTilemaps(this->getBackgroundSize(1));
this->_backgrounds[2].setTileMapStartAddress(this->getTileMapStartAddress(2));
this->_backgrounds[2].setTilemaps(this->getBackgroundSize(2));
this->_backgrounds[3].setTileMapStartAddress(this->getTileMapStartAddress(2));
this->_backgrounds[3].setTilemaps(this->getBackgroundSize(2));
this->_backgrounds[4].setTileMapStartAddress(this->getTileMapStartAddress(3));
this->_backgrounds[5].setTileMapStartAddress(this->getTileMapStartAddress(3));
//registres bgnba
//this->_registers._bgnba[0].baseAddressBg1a3 = 0x5;
//this->_registers._bgnba[0].baseAddressBg2a4 = 0x5;
this->_registers._bgnba[1].baseAddressBg1a3 = 0x5;
//this->_backgrounds[0].setTilesetAddress(this->getTilesetAddress(1));
//this->_backgrounds[1].setTilesetAddress(this->getTilesetAddress(1));
//this->_backgrounds[2].setTilesetAddress(this->getTilesetAddress(2));
//this->_backgrounds[3].setTilesetAddress(this->getTilesetAddress(2));
this->_backgrounds[4].setTilesetAddress(this->getTilesetAddress(3));
this->_backgrounds[5].setTilesetAddress(this->getTilesetAddress(3));
this->_registers._vmain.incrementMode = true;
this->_registers._vmain.incrementAmount = 1;
this->_registers._vmdata.vmdata = 0x1AF0;
this->_registers._t[0].enableWindowDisplayBg1 = true;
this->_registers._t[0].enableWindowDisplayBg2 = true;
this->_registers._t[0].enableWindowDisplayBg3 = true;
*/
}
uint8_t PPU::read(uint24_t addr)
{
//return 0;
switch (addr) {
case PpuRegisters::mpyl:
return this->_registers._mpy.mpyl;
case PpuRegisters::mpym:
return this->_registers._mpy.mpym;
case PpuRegisters::mpyh:
return this->_registers._mpy.mpyh;
case PpuRegisters::slhv:
return this->_registers._slhv;
case PpuRegisters::oamdataread:
return 0;
case PpuRegisters::vmdatalread: {
auto returnValue = static_cast<uint8_t>(this->_vramReadBuffer);
if (!this->_registers._vmain.incrementMode) {
this->updateVramReadBuffer();
// & 0x7FFF;
this->_registers._vmadd.vmadd += this->_registers._incrementAmount;
}
return returnValue;
}
case PpuRegisters::vmdatahread: {
auto returnValue = static_cast<uint8_t>(this->_vramReadBuffer >> 8);
if (this->_registers._vmain.incrementMode) {
this->updateVramReadBuffer();
// & 0x7FFF;
this->_registers._vmadd.vmadd += this->_registers._incrementAmount;
}
return returnValue;
}
case PpuRegisters::cgdataread: {
return this->cgram->read_internal(this->_registers._cgadd++);
}
case PpuRegisters::ophct:
case PpuRegisters::opvct:
case PpuRegisters::stat77:
case PpuRegisters::stat78:
return 0;
default:
throw InvalidAddress("PPU Internal Registers read ", addr);
}
}
void PPU::write(uint24_t addr, uint8_t data)
{
//return;
switch (addr) {
case PpuRegisters::inidisp:
this->_registers._inidisp.raw = data;
break;
case PpuRegisters::obsel:
this->_registers._obsel.raw = data;
break;
case PpuRegisters::oamaddl:
this->_registers._oamadd.oamaddl = data;
break;
case PpuRegisters::oamaddh:
this->_registers._oamadd.oamaddh = data;
break;
case PpuRegisters::oamdata:
this->_registers._oamdata = data;
//throw InvalidAddress("oamdata", addr);
std::cout << "oamdata" << std::endl;
// the oamAddress have to be calculated if fblank or not (not implemented)
oamram->write_internal(this->_registers._oamadd.oamAddress, this->_registers._oamdata);
this->_registers._oamadd.oamAddress++;
break;
case PpuRegisters::bgmode:
this->_registers._bgmode.raw = data;
// update backgrounds
for (int i = 0; i < 8; i++) {
this->_backgrounds[i].setBpp(this->getBPP((i / 2) + 1));
this->_backgrounds[i].setCharacterSize(this->getCharacterSize((i / 2) + 1));
}
break;
case PpuRegisters::mosaic:
this->_registers._mosaic.raw = data;
break;
case PpuRegisters::bg1sc:
case PpuRegisters::bg2sc:
case PpuRegisters::bg3sc:
case PpuRegisters::bg4sc:
this->_registers._bgsc[addr - 0x07].raw = data;
// update background tilemap address
this->_backgrounds[addr - 0x07].setTileMapStartAddress(this->getTileMapStartAddress(addr - 0x07 + 1));
this->_backgrounds[addr - 0x07 + 1].setTileMapStartAddress(this->getTileMapStartAddress(addr - 0x07 + 1));
this->_backgrounds[addr - 0x07].setTilemaps({this->_registers._bgsc[addr - 0x07].tilemapHorizontalMirroring, this->_registers._bgsc[addr - 0x07].tilemapVerticalMirroring});
this->_backgrounds[addr - 0x07 + 1].setTilemaps({this->_registers._bgsc[addr - 0x07].tilemapHorizontalMirroring, this->_registers._bgsc[addr - 0x07].tilemapVerticalMirroring});
break;
case PpuRegisters::bg12nba:
case PpuRegisters::bg34nba:
this->_registers._bgnba[addr - PpuRegisters::bg12nba].raw = data;
break;
case PpuRegisters::bg1hofs:
// TODO need of special var for prev value for Mode 7
this->_registers._m7ofs[addr - PpuRegisters::bg1hofs].raw = data;
__attribute__((fallthrough));
case PpuRegisters::bg2hofs:
case PpuRegisters::bg3hofs:
case PpuRegisters::bg4hofs:
this->_registers._bgofs[addr - PpuRegisters::bg1hofs].raw = ((data << 8) | (this->_ppuState.hvSharedScrollPrevValue & ~7) | (this->_ppuState.hScrollPrevValue & 7)) & 0x3FF;
this->_ppuState.hScrollPrevValue = data;
this->_ppuState.hvSharedScrollPrevValue = data;
break;
case PpuRegisters::bg1vofs:
// TODO need of special var for prev value for Mode 7
this->_registers._bgnba[addr - PpuRegisters::bg12nba].raw = data;
__attribute__((fallthrough));
case PpuRegisters::bg2vofs:
case PpuRegisters::bg3vofs:
case PpuRegisters::bg4vofs:
this->_registers._bgofs[addr - PpuRegisters::bg1hofs].raw = ((data << 8) | this->_ppuState.hvSharedScrollPrevValue) & 0x3FF;
this->_ppuState.hvSharedScrollPrevValue = data;
break;
case PpuRegisters::vmain:
this->_registers._vmain.raw = data;
switch (this->_registers._vmain.incrementAmount) {
case 0b00:
this->_registers._incrementAmount = 1;
break;
case 0b01:
this->_registers._incrementAmount = 32;
break;
case 0b10:
case 0b11:
this->_registers._incrementAmount = 128;
}
break;
case PpuRegisters::vmaddl:
this->_registers._vmadd.vmaddl = data;
this->updateVramReadBuffer();
break;
case PpuRegisters::vmaddh:
this->_registers._vmadd.vmaddh = data;
this->updateVramReadBuffer();
break;
case PpuRegisters::vmdatal:
//throw InvalidAddress("vmdata", addr);
//std::cout << "vmdatal" << std::endl;
if (!this->_registers._inidisp.fblank) {
this->_registers._vmdata.vmdatal = data;
this->vram->write_internal(this->getVramAddress(), data);
}
if (!this->_registers._vmain.incrementMode)
this->_registers._vmadd.vmadd += this->_registers._incrementAmount;
break;
case PpuRegisters::vmdatah:
//std::cout << "vmdatah" << std::endl;
if (!this->_registers._inidisp.fblank) {
this->_registers._vmdata.vmdatah = data;
this->vram->write_internal(this->getVramAddress() + 1, data);
}
if (this->_registers._vmain.incrementMode)
this->_registers._vmadd.vmadd += this->_registers._incrementAmount;
break;
case PpuRegisters::m7sel:
this->_registers._m7sel.raw = data;
break;
case PpuRegisters::m7a:
case PpuRegisters::m7b:
case PpuRegisters::m7c:
case PpuRegisters::m7d:
this->_registers._m7[addr - PpuRegisters::m7a].m7 = (this->_registers._m7[addr - PpuRegisters::m7a].m7 << 8U) | data;
break;
case PpuRegisters::m7x:
case PpuRegisters::m7y:
// TODO these registers
break;
case PpuRegisters::cgadd:
this->_registers._cgadd = data;
this->_registers._isLowByte = true;
break;
case PpuRegisters::cgdata:
if (this->_registers._isLowByte) {
this->_registers._cgdata.cgdatal = data;
}
else {
this->_registers._cgdata.cgdatah = data;
this->cgram->write_internal(this->_registers._cgadd, this->_registers._cgdata.cgdatal);
this->_registers._cgadd++;
this->cgram->write_internal(this->_registers._cgadd, this->_registers._cgdata.cgdatah);
this->_registers._cgadd++;
}
this->_registers._isLowByte = !this->_registers._isLowByte;
break;
case PpuRegisters::w12sel:
case PpuRegisters::w34sel:
case PpuRegisters::wobjsel:
this->_registers._wsel[addr - PpuRegisters::w12sel].raw = data;
break;
case PpuRegisters::wh0:
this->_registers._wh0 = data;
break;
case PpuRegisters::wh1:
this->_registers._wh1 = data;
break;
case PpuRegisters::wh2:
this->_registers._wh2 = data;
break;
case PpuRegisters::wh3:
this->_registers._wh3 = data;
break;
case PpuRegisters::wbjlog:
this->_registers._wbglog.raw = data;
break;
case PpuRegisters::wobjlog:
this->_registers._wobjlog.raw = data;
break;
case PpuRegisters::tm:
case PpuRegisters::ts:
this->_registers._t[addr - PpuRegisters::tm].raw = data;
break;
case PpuRegisters::tmw:
case PpuRegisters::tsw:
this->_registers._tw[addr - PpuRegisters::tmw].raw = data;
break;
case PpuRegisters::cgwsel:
this->_registers._cgwsel.raw = data;
break;
case PpuRegisters::cgadsub:
this->_registers._cgadsub.raw = data;
break;
case PpuRegisters::coldata:
this->_registers._coldata.raw = data;
break;
case PpuRegisters::setini:
this->_registers._setini.raw = data;
break;
//TODO adding the rest of the registers. oaf !
case PpuRegisters::stat77: // some roms write here but it is useless
break;
default:
throw InvalidAddress("PPU Internal Registers write", addr);
}
}
uint16_t PPU::getVramAddress() const
{
uint16_t vanillaAddress = this->_registers._vmadd.vmadd * 2;
switch (this->_registers._vmain.addressRemapping) {
case 0b00:
return vanillaAddress;
case 0b01:
return (vanillaAddress & 0xFF00U) | (vanillaAddress & 0x00E0U) >> 5U | (vanillaAddress & 0x001FU) << 3U;
case 0b10:
return (vanillaAddress & 0xFE00U) | (vanillaAddress & 0x01C0U) >> 6U | (vanillaAddress & 0x3FU) << 3U;
case 0b11:
return (vanillaAddress & 0xFC00U) | (vanillaAddress & 0x0380U) >> 7U | (vanillaAddress & 0x7FU) << 3U;
}
}
void PPU::update(unsigned cycles)
{
(void)cycles;
this->renderMainAndSubScreen();
this->add_buffer(this->_screen, this->_subScreen);
this->add_buffer(this->_screen, this->_mainScreen);
//this->_backgrounds[2].renderBackground();
//add_buffer(this->_screen, this->_backgrounds[2].buffer);
for (unsigned long i = 0; i < this->_screen.size(); i++) {
for (unsigned long j = 0; j < this->_screen[i].size(); j++) {
this->_renderer.putPixel(j, i, this->_screen[i][j]);
}
}
this->_renderer.drawScreen();
}
std::string PPU::getName()
{
return "PPU";
}
std::string PPU::getValueName(uint24_t addr) const
{
switch (addr) {
case PpuRegisters::inidisp:
return "INIDISP";
case PpuRegisters::obsel:
return "OBSEL";
case PpuRegisters::oamaddl:
return "OAMADDL";
case PpuRegisters::oamaddh:
return "OAMDDH";
case PpuRegisters::oamdata:
return "OAMDATA";
case PpuRegisters::bgmode:
return "BGMODE";
case PpuRegisters::mosaic:
return "MOSAIC";
case PpuRegisters::bg1sc:
return "BG1SC";
case PpuRegisters::bg2sc:
return "BG2SC";
case PpuRegisters::bg3sc:
return "BG3SC";
case PpuRegisters::bg4sc:
return "BG4SC";
case PpuRegisters::bg12nba:
return "BG12NBA";
case PpuRegisters::bg34nba:
return "BG34NBA";
case PpuRegisters::bg1hofs:
return "BG1HOFS";
case PpuRegisters::bg1vofs:
return "BG1VOFS";
case PpuRegisters::bg2hofs:
return "BG2HOFS";
case PpuRegisters::bg2vofs:
return "BG2VOFS";
case PpuRegisters::bg3hofs:
return "BG3HOFS";
case PpuRegisters::bg3vofs:
return "BG3VOFS";
case PpuRegisters::bg4hofs:
return "BG4HOFS";
case PpuRegisters::bg4vofs:
return "BG4VOFS";
case PpuRegisters::vmain:
return "VMAIN";
case PpuRegisters::vmaddl:
return "VMADDL";
case PpuRegisters::vmaddh:
return "VMADDH";
case PpuRegisters::vmdatal:
return "VMDATAL";
case PpuRegisters::vmdatah:
return "VMDATAH";
case PpuRegisters::m7sel:
return "M7SEL";
case PpuRegisters ::m7a:
return "M7A";
case PpuRegisters ::m7b:
return "M7B";
case PpuRegisters ::m7c:
return "M7C";
case PpuRegisters ::m7d:
return "M7D";
case PpuRegisters ::m7x:
return "M7X";
case PpuRegisters ::m7y:
return "M7Y";
case PpuRegisters::cgadd:
return "CGADD";
case PpuRegisters::cgdata:
return "CGDATA";
case PpuRegisters::w12sel:
return "W12SEL";
case PpuRegisters::w34sel:
return "W34SEL";
case PpuRegisters::wobjsel:
return "WOBJSEL";
case PpuRegisters::wh0:
return "WH0";
case PpuRegisters::wh1:
return "WH1";
case PpuRegisters::wh2:
return "WH2";
case PpuRegisters::wh3:
return "WH3";
case PpuRegisters::wbjlog:
return "WBJLOG";
case PpuRegisters::wobjlog:
return "WOBJLOG";
case PpuRegisters::tm:
return "TM";
case PpuRegisters::ts:
return "TS";
case PpuRegisters::tmw:
return "TMW";
case PpuRegisters::tsw:
return "TSW";
case PpuRegisters::cgwsel:
return "CGWSEL";
case PpuRegisters::cgadsub:
return "CGADDSUB";
case PpuRegisters::coldata:
return "COLDATA";
case PpuRegisters::setini:
return "SETINI";
case PpuRegisters::mpyl:
return "MPYL";
case PpuRegisters::mpym:
return "MPYM";
case PpuRegisters::mpyh:
return "MPYH";
case PpuRegisters::slhv:
return "SLHV";
case PpuRegisters::oamdataread:
return "OAMDATAREAD";
case PpuRegisters::vmdatalread:
return "VMDATALREAD";
case PpuRegisters::vmdatahread:
return "VMDATAHREAD";
case PpuRegisters::cgdataread:
return "CGDATAREAD";
case PpuRegisters::ophct:
return "OPHCT";
case PpuRegisters::opvct:
return "OPVCT";
case PpuRegisters::stat77:
return "STAT77";
case PpuRegisters::stat78:
return "STAT78";
default:
return "???";
}
}
Component PPU::getComponent()
{
return Ppu;
}
bool PPU::isDebugger() const
{
return false;
}
uint16_t PPU::cgramRead(uint16_t addr)
{
return this->cgram->read_internal(addr);
}
int PPU::getBPP(int bgNumber) const
{
switch (this->_registers._bgmode.bgMode) {
case 0:
return 2;
case 1:
if (bgNumber < 3)
return 4;
return 2;
case 2:
return 4;
case 3:
if (bgNumber == 1)
return 8;
return 4;
case 4:
if (bgNumber == 1)
return 8;
return 2;
case 5:
if (bgNumber == 1)
return 4;
return 2;
case 6:
return 4;
case 7:
if (bgNumber == 1)
return 8;
return 7;
default:
return -1;
}
}
Vector2<int> PPU::getCharacterSize(int bgNumber) const
{
Vector2<int> characterSize(8, 8);
//TODO this wont work for modes 5 and 6 and will be reworked
if (this->_registers._bgmode.raw & (1U << (3 + bgNumber)))
characterSize = {16, 16};
return characterSize;
}
uint16_t PPU::getTileMapStartAddress(int bgNumber) const
{
return this->_registers._bgsc[bgNumber - 1].tilemapAddress << 11U;
}
uint16_t PPU::getTilesetAddress(int bgNumber) const
{
uint16_t baseAddress = this->_registers._bgnba[bgNumber > 2].raw;
baseAddress = (bgNumber % 2) ? baseAddress & 0xFU : (baseAddress & 0xFU) >> 4U;
baseAddress = baseAddress << 13U;
return baseAddress;
}
Vector2<int> PPU::getBackgroundSize(int bgNumber) const
{
Vector2<int> backgroundSize(0,0);
backgroundSize.y = (this->_registers._bgsc[bgNumber - 1].tilemapVerticalMirroring) ? 2 : 1;
backgroundSize.x = (this->_registers._bgsc[bgNumber - 1].tilemapHorizontalMirroring) ? 2 : 1;
return backgroundSize;
}
void PPU::renderMainAndSubScreen()
{
uint16_t colorPalette;
// should only render backgrounds needed (depending of th bgMode)
int i = 0;
for (auto &_background : this->_backgrounds) {
i++;
_background.renderBackground();
}
// TODO make a function getDefaultBgColor
colorPalette = this->cgram->read_internal(0);
colorPalette += this->cgram->read_internal(1) << 8U;
for (unsigned long i = 0; i < this->_subScreen.size(); i++)
for (unsigned long j = 0; j < this->_subScreen[i].size(); j++)
this->_subScreen[i][j] = getRealColor(colorPalette);
// the buffer is overwrite if necessary by a new bg so the background priority is from back to front
// the starting palette index isn't implemented
switch (this->_registers._bgmode.bgMode) {
case 0:
this->addToMainSubScreen(this->_backgrounds[BgName::bg4NoPriority]);
this->addToMainSubScreen(this->_backgrounds[BgName::bg3NoPriority]);
//sprites priority 0
this->addToMainSubScreen(this->_backgrounds[BgName::bg4Priority]);
this->addToMainSubScreen(this->_backgrounds[BgName::bg3Priority]);
//sprites priority 1
this->addToMainSubScreen(this->_backgrounds[BgName::bg2NoPriority]);
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg2Priority]);
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
break;
case 1:
this->addToMainSubScreen(this->_backgrounds[BgName::bg3NoPriority]);
//sprites priority 0
if (!this->_registers._bgmode.mode1Bg3PriorityBit)
this->addToMainSubScreen(this->_backgrounds[BgName::bg3Priority]);
//sprites priority 1
this->addToMainSubScreen(this->_backgrounds[BgName::bg2NoPriority]);
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg2Priority]);
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
if (this->_registers._bgmode.mode1Bg3PriorityBit)
this->addToMainSubScreen(this->_backgrounds[BgName::bg3Priority]);
break;
case 2:
this->addToMainSubScreen(this->_backgrounds[BgName::bg2NoPriority]);
//sprites priority 0
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 1
this->addToMainSubScreen(this->_backgrounds[BgName::bg2Priority]);
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
break;
case 3:
this->addToMainSubScreen(this->_backgrounds[BgName::bg2NoPriority]);
//sprites priority 0
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 1
this->addToMainSubScreen(this->_backgrounds[BgName::bg2Priority]);
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
break;
case 4:
this->addToMainSubScreen(this->_backgrounds[BgName::bg2NoPriority]);
//sprites priority 0
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 1
this->addToMainSubScreen(this->_backgrounds[BgName::bg2Priority]);
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
break;
case 5:
this->addToMainSubScreen(this->_backgrounds[BgName::bg2NoPriority]);
//sprites priority 0
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 1
this->addToMainSubScreen(this->_backgrounds[BgName::bg2Priority]);
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
break;
case 6:
//sprites priority 0
this->addToMainSubScreen(this->_backgrounds[BgName::bg1NoPriority]);
//sprites priority 1
//sprites priority 2
this->addToMainSubScreen(this->_backgrounds[BgName::bg1Priority]);
//sprites priority 3
break;
case 7:
// Not implemented
default:
break;
}
}
template <std::size_t DEST_SIZE, std::size_t SRC_SIZE>
void PPU::add_buffer(std::array<std::array<uint32_t, DEST_SIZE>, DEST_SIZE> &bufferDest, std::array<std::array<uint32_t, SRC_SIZE>, SRC_SIZE> &bufferSrc)
{
for (unsigned long i = 0; i < bufferSrc.size(); i++) {
for (unsigned long j = 0; j < bufferSrc[i].size(); j++) {
if (bufferSrc[i][j] > 0xFF) // 0xFF correspond to a black pixel with full brightness
bufferDest[i][j] = bufferSrc[i][j];
}
}
}
void PPU::addToMainSubScreen(Background &bg)
{
if (this->_registers._t[0].raw & (1U << (bg.getBgNumber() - 1U)))
this->add_buffer(this->_mainScreen, bg.buffer);
if (this->_registers._t[1].raw & (1U << (bg.getBgNumber() - 1U)))
this->add_buffer(this->_subScreen, bg.buffer);
}
int PPU::getBgMode() const
{
return this->_registers._bgmode.bgMode;
}
void PPU::updateVramReadBuffer()
{
this->_vramReadBuffer = this->vram->read_internal(this->getVramAddress());
this->_vramReadBuffer += this->vram->read_internal(this->getVramAddress() + 1) << 8;
}
Vector2<int> PPU::getBgScroll(int bgNumber) const
{
return Vector2<int>(this->_registers._bgofs[(bgNumber - 1) * 2].offsetBg, this->_registers._bgofs[(bgNumber - 1) * 2 + 1].offsetBg);
}
}
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