2811 lines
76 KiB
C++
2811 lines
76 KiB
C++
#include "stdafx.h"
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#include "Ppu.h"
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#include "Console.h"
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#include "MemoryManager.h"
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#include "Cpu.h"
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#include "Spc.h"
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#include "InternalRegisters.h"
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#include "EmuSettings.h"
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#include "ControlManager.h"
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#include "VideoDecoder.h"
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#include "VideoRenderer.h"
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#include "NotificationManager.h"
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#include "DmaController.h"
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#include "MessageManager.h"
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#include "EventType.h"
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#include "RewindManager.h"
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#include "../Utilities/HexUtilities.h"
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#include "../Utilities/Serializer.h"
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static constexpr uint8_t _oamSizes[8][2][2] = {
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{{1, 1}, {2, 2}}, //8x8 + 16x16
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{{1, 1}, {4, 4}}, //8x8 + 32x32
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{{1, 1}, {8, 8}}, //8x8 + 64x64
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{{2, 2}, {4, 4}}, //16x16 + 32x32
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{{2, 2}, {8, 8}}, //16x16 + 64x64
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{{4, 4}, {8, 8}}, //32x32 + 64x64
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{{2, 4}, {4, 8}}, //16x32 + 32x64
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{{2, 4}, {4, 4}} //16x32 + 32x32
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};
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Ppu::Ppu(Console* console)
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{
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_console = console;
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_vram = new uint16_t[Ppu::VideoRamSize >> 1];
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_outputBuffers[0] = new uint16_t[512 * 478];
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_outputBuffers[1] = new uint16_t[512 * 478];
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memset(_outputBuffers[0], 0, 512 * 478 * sizeof(uint16_t));
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memset(_outputBuffers[1], 0, 512 * 478 * sizeof(uint16_t));
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}
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Ppu::~Ppu()
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{
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delete[] _vram;
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delete[] _outputBuffers[0];
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delete[] _outputBuffers[1];
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}
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void Ppu::PowerOn()
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{
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_skipRender = false;
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_regs = _console->GetInternalRegisters().get();
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_settings = _console->GetSettings().get();
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_spc = _console->GetSpc().get();
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_memoryManager = _console->GetMemoryManager().get();
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_currentBuffer = _outputBuffers[0];
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_state = {};
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_state.ForcedVblank = true;
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_state.VramIncrementValue = 1;
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if (_settings->GetEmulationConfig().EnableRandomPowerOnState)
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{
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RandomizeState();
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}
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_settings->InitializeRam(_vram, Ppu::VideoRamSize);
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_settings->InitializeRam(_cgram, Ppu::CgRamSize);
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_settings->InitializeRam(_oamRam, Ppu::SpriteRamSize);
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memset(_spriteIndexes, 0xFF, sizeof(_spriteIndexes));
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UpdateNmiScanline();
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}
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void Ppu::Reset()
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{
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_scanline = 0;
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_state.ForcedVblank = true;
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_oddFrame = 0;
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}
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uint32_t Ppu::GetFrameCount()
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{
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return _frameCount;
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}
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uint16_t Ppu::GetScanline()
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{
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return _scanline;
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}
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uint16_t Ppu::GetCycle()
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{
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//"normally dots 323 and 327 are 6 master cycles instead of 4."
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uint16_t hClock = _memoryManager->GetHClock();
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if (hClock <= 1292)
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{
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return hClock >> 2;
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}
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else if (hClock <= 1310)
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{
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return (hClock - 2) >> 2;
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}
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else
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{
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return (hClock - 4) >> 2;
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}
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}
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uint16_t Ppu::GetNmiScanline()
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{
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return _nmiScanline;
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}
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uint16_t Ppu::GetVblankStart()
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{
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return _vblankStartScanline;
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}
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PpuState Ppu::GetState()
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{
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PpuState state;
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GetState(state, false);
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return state;
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}
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void Ppu::GetState(PpuState& state, bool returnPartialState)
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{
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if (!returnPartialState)
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{
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state = _state;
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}
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state.Cycle = GetCycle();
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state.Scanline = _scanline;
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state.HClock = _memoryManager->GetHClock();
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state.FrameCount = _frameCount;
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}
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template <bool hiResMode>
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void Ppu::GetTilemapData(uint8_t layerIndex, uint8_t columnIndex)
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{
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/* The current layer's options */
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LayerConfig& config = _state.Layers[layerIndex];
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uint16_t vScroll = config.VScroll;
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uint16_t hScroll = hiResMode ? (config.HScroll << 1) : config.HScroll;
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if (_hOffset || _vOffset)
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{
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uint16_t enableBit = layerIndex == 0 ? 0x2000 : 0x4000;
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if (_state.BgMode == 4)
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{
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if ((_hOffset & 0x8000) == 0 && (_hOffset & enableBit))
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{
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hScroll = (hScroll & 0x07) | (_hOffset & 0x3F8);
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}
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if ((_hOffset & 0x8000) != 0 && (_hOffset & enableBit))
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{
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vScroll = (_hOffset & 0x3FF);
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}
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}
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else
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{
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if (_hOffset & enableBit)
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{
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hScroll = (hScroll & 0x07) | (_hOffset & 0x3F8);
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}
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if (_vOffset & enableBit)
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{
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vScroll = (_vOffset & 0x3FF);
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}
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}
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}
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if (hiResMode)
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{
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hScroll >>= 1;
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}
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uint16_t realY = IsDoubleHeight() ? (_oddFrame ? ((_scanline << 1) + 1) : (_scanline << 1)) : _scanline;
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if (_state.MosaicEnabled && (_state.MosaicEnabled & (1 << layerIndex)))
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{
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//Keep the "scanline" to what it was at the start of this mosaic block
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realY -= _state.MosaicSize - _mosaicScanlineCounter;
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if (IsDoubleHeight())
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{
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realY -= _state.MosaicSize - _mosaicScanlineCounter;
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}
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}
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/* The current row of tiles (e.g scanlines 16-23 is row 2) */
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uint16_t row = (realY + vScroll) >> (config.LargeTiles ? 4 : 3);
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/* Tilemap offset based on the current row & tilemap size options */
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uint16_t addrVerticalScrollingOffset = config.DoubleHeight ? ((row & 0x20) << (config.DoubleWidth ? 6 : 5)) : 0;
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/* The start address for tiles on this row */
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uint16_t baseOffset = config.TilemapAddress + addrVerticalScrollingOffset + ((row & 0x1F) << 5);
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/* The current column index (in terms of 8x8 or 16x16 tiles) */
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uint16_t column = columnIndex + (hScroll >> 3);
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if (!hiResMode && config.LargeTiles)
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{
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//For 16x16 tiles, need to return the same tile for 2 columns 8 pixel columns in a row
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column >>= 1;
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}
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/* The tilemap address to read the tile data from */
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uint16_t addr = baseOffset + (column & 0x1F) + (config.DoubleWidth ? (column & 0x20) << 5 : 0);
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_layerData[layerIndex].Tiles[columnIndex].TilemapData = _vram[addr & 0x7FFF];
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_layerData[layerIndex].Tiles[columnIndex].VScroll = vScroll;
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}
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template <bool hiResMode, uint8_t bpp, bool secondTile>
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void Ppu::GetChrData(uint8_t layerIndex, uint8_t column, uint8_t plane)
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{
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LayerConfig& config = _state.Layers[layerIndex];
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TileData& tileData = _layerData[layerIndex].Tiles[column];
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uint16_t tilemapData = tileData.TilemapData;
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bool largeTileWidth = hiResMode || config.LargeTiles;
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bool vMirror = (tilemapData & 0x8000) != 0;
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bool hMirror = (tilemapData & 0x4000) != 0;
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uint16_t realY = IsDoubleHeight() ? (_oddFrame ? ((_scanline << 1) + 1) : (_scanline << 1)) : _scanline;
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if (_state.MosaicEnabled && (_state.MosaicEnabled & (1 << layerIndex)))
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{
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//Keep the "scanline" to what it was at the start of this mosaic block
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realY -= _state.MosaicSize - _mosaicScanlineCounter;
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if (IsDoubleHeight())
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{
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realY -= _state.MosaicSize - _mosaicScanlineCounter + (_oddFrame ? 1 : 0);
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}
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}
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bool useSecondTile = secondTile;
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if (!hiResMode && config.LargeTiles)
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{
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//For 16x16 tiles, need to return the 2nd part of the tile every other column
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useSecondTile = (((column << 3) + config.HScroll) & 0x08) == 0x08;
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}
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uint16_t tileIndex = tilemapData & 0x3FF;
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if (largeTileWidth)
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{
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tileIndex = (
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tileIndex +
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(config.LargeTiles ? (((realY + tileData.VScroll) & 0x08) ? (vMirror ? 0 : 16) : (vMirror ? 16 : 0)) : 0) +
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(largeTileWidth ? (useSecondTile ? (hMirror ? 0 : 1) : (hMirror ? 1 : 0)) : 0)
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) & 0x3FF;
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}
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uint16_t tileStart = config.ChrAddress + tileIndex * 4 * bpp;
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uint8_t baseYOffset = (realY + tileData.VScroll) & 0x07;
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uint8_t yOffset = vMirror ? (7 - baseYOffset) : baseYOffset;
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uint16_t pixelStart = tileStart + yOffset + (plane << 3);
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tileData.ChrData[plane + (secondTile ? bpp / 2 : 0)] = _vram[pixelStart & 0x7FFF];
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}
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void Ppu::GetHorizontalOffsetByte(uint8_t columnIndex)
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{
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uint16_t columnOffset = (((columnIndex << 3) + (_state.Layers[2].HScroll & ~0x07)) >> 3) & (
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_state.Layers[2].DoubleWidth ? 0x3F : 0x1F);
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uint16_t rowOffset = (_state.Layers[2].VScroll >> 3) & (_state.Layers[2].DoubleHeight ? 0x3F : 0x1F);
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_hOffset = _vram[(_state.Layers[2].TilemapAddress + columnOffset + (rowOffset << 5)) & 0x7FFF];
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}
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void Ppu::GetVerticalOffsetByte(uint8_t columnIndex)
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{
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uint16_t columnOffset = (((columnIndex << 3) + (_state.Layers[2].HScroll & ~0x07)) >> 3) & (
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_state.Layers[2].DoubleWidth ? 0x3F : 0x1F);
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uint16_t rowOffset = (_state.Layers[2].VScroll >> 3) & (_state.Layers[2].DoubleHeight ? 0x3F : 0x1F);
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uint16_t tileOffset = columnOffset + (rowOffset << 5);
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//The vertical offset is 0x40 bytes later - but wraps around within the tilemap based on the tilemap size (0x800 or 0x1000 bytes)
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uint16_t vOffsetAddr = _state.Layers[2].TilemapAddress + ((tileOffset + 0x20) & (_state.Layers[2].DoubleHeight
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? 0x7FF
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: 0x3FF));
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_vOffset = _vram[vOffsetAddr & 0x7FFF];
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}
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void Ppu::FetchTileData()
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{
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if (_state.ForcedVblank)
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{
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return;
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}
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if (_fetchBgStart == 0)
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{
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_hOffset = 0;
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_vOffset = 0;
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}
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if (_state.BgMode == 0)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<false>(3, x >> 3);
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break;
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case 1: GetTilemapData<false>(2, x >> 3);
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break;
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case 2: GetTilemapData<false>(1, x >> 3);
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break;
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case 3: GetTilemapData<false>(0, x >> 3);
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break;
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case 4: GetChrData<false, 2>(3, x >> 3, 0);
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break;
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case 5: GetChrData<false, 2>(2, x >> 3, 0);
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break;
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case 6: GetChrData<false, 2>(1, x >> 3, 0);
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break;
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case 7: GetChrData<false, 2>(0, x >> 3, 0);
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break;
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}
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}
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}
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else if (_state.BgMode == 1)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<false>(2, x >> 3);
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break;
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case 1: GetTilemapData<false>(1, x >> 3);
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break;
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case 2: GetTilemapData<false>(0, x >> 3);
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break;
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case 3: GetChrData<false, 2>(2, x >> 3, 0);
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break;
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case 4: GetChrData<false, 4>(1, x >> 3, 0);
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break;
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case 5: GetChrData<false, 4>(1, x >> 3, 1);
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break;
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case 6: GetChrData<false, 4>(0, x >> 3, 0);
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break;
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case 7: GetChrData<false, 4>(0, x >> 3, 1);
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break;
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}
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}
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}
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else if (_state.BgMode == 2)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<false>(1, x >> 3);
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break;
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case 1: GetTilemapData<false>(0, x >> 3);
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break;
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case 2: GetHorizontalOffsetByte(x >> 3);
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break;
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case 3: GetVerticalOffsetByte(x >> 3);
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break;
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case 4: GetChrData<false, 4>(1, x >> 3, 0);
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break;
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case 5: GetChrData<false, 4>(1, x >> 3, 1);
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break;
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case 6: GetChrData<false, 4>(0, x >> 3, 0);
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break;
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case 7: GetChrData<false, 4>(0, x >> 3, 1);
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break;
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}
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}
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}
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else if (_state.BgMode == 3)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<false>(1, x >> 3);
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break;
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case 1: GetTilemapData<false>(0, x >> 3);
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break;
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case 2: GetChrData<false, 4>(1, x >> 3, 0);
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break;
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case 3: GetChrData<false, 4>(1, x >> 3, 1);
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break;
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case 4: GetChrData<false, 8>(0, x >> 3, 0);
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break;
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case 5: GetChrData<false, 8>(0, x >> 3, 1);
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break;
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case 6: GetChrData<false, 8>(0, x >> 3, 2);
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break;
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case 7: GetChrData<false, 8>(0, x >> 3, 3);
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break;
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}
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}
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}
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else if (_state.BgMode == 4)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<false>(1, x >> 3);
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break;
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case 1: GetTilemapData<false>(0, x >> 3);
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break;
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case 2: GetHorizontalOffsetByte(x >> 3);
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break;
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case 3: GetChrData<false, 2>(1, x >> 3, 0);
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break;
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case 4: GetChrData<false, 8>(0, x >> 3, 0);
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break;
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case 5: GetChrData<false, 8>(0, x >> 3, 1);
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break;
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case 6: GetChrData<false, 8>(0, x >> 3, 2);
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break;
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case 7: GetChrData<false, 8>(0, x >> 3, 3);
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break;
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}
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}
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}
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else if (_state.BgMode == 5)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<true>(1, x >> 3);
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break;
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case 1: GetTilemapData<true>(0, x >> 3);
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break;
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case 2: GetChrData<true, 2>(1, x >> 3, 0);
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break;
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case 3: GetChrData<true, 2, true>(1, x >> 3, 0);
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break;
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case 4: GetChrData<true, 4>(0, x >> 3, 0);
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break;
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case 5: GetChrData<true, 4>(0, x >> 3, 1);
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break;
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case 6: GetChrData<true, 4, true>(0, x >> 3, 0);
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break;
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case 7: GetChrData<true, 4, true>(0, x >> 3, 1);
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break;
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}
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}
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}
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else if (_state.BgMode == 6)
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{
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for (int x = _fetchBgStart; x <= _fetchBgEnd; x++)
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{
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switch (x & 0x07)
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{
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case 0: GetTilemapData<true>(1, x >> 3);
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break;
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case 1: GetTilemapData<true>(0, x >> 3);
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break;
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case 2: GetHorizontalOffsetByte(x >> 3);
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break;
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case 3: GetVerticalOffsetByte(x >> 3);
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break;
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case 4: GetChrData<true, 4>(0, x >> 3, 0);
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break;
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case 5: GetChrData<true, 4>(0, x >> 3, 1);
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break;
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case 6: GetChrData<true, 4, true>(0, x >> 3, 0);
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break;
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case 7: GetChrData<true, 4, true>(0, x >> 3, 1);
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break;
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}
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}
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}
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}
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bool Ppu::ProcessEndOfScanline(uint16_t hClock)
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{
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if (hClock >= 1364 || (hClock == 1360 && _scanline == 240 && _oddFrame && !_state.ScreenInterlace))
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{
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//"In non-interlace mode scanline 240 of every other frame (those with $213f.7=1) is only 1360 cycles."
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if (_scanline < _vblankStartScanline)
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{
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RenderScanline();
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|
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if (_scanline == 0)
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{
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_overscanFrame = _state.OverscanMode;
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|
_mosaicScanlineCounter = _state.MosaicEnabled ? _state.MosaicSize + 1 : 0;
|
|
|
|
//Update overclock timings once per frame
|
|
UpdateNmiScanline();
|
|
|
|
if (!_skipRender)
|
|
{
|
|
if (!_interlacedFrame)
|
|
{
|
|
_currentBuffer = _currentBuffer == _outputBuffers[0] ? _outputBuffers[1] : _outputBuffers[0];
|
|
}
|
|
|
|
//If we're not skipping this frame, reset the high resolution/interlace flags
|
|
_useHighResOutput = IsDoubleWidth() || _state.ScreenInterlace;
|
|
_interlacedFrame = _state.ScreenInterlace;
|
|
}
|
|
}
|
|
|
|
if (_mosaicScanlineCounter)
|
|
{
|
|
_mosaicScanlineCounter--;
|
|
if (_state.MosaicEnabled && !_mosaicScanlineCounter)
|
|
{
|
|
_mosaicScanlineCounter = _state.MosaicSize;
|
|
}
|
|
}
|
|
|
|
_drawStartX = 0;
|
|
_drawEndX = 0;
|
|
_fetchBgStart = 0;
|
|
_fetchBgEnd = 0;
|
|
_fetchSpriteStart = 0;
|
|
_fetchSpriteEnd = 0;
|
|
_spriteEvalStart = 0;
|
|
_spriteEvalEnd = 0;
|
|
_spriteFetchingDone = false;
|
|
|
|
memset(_hasSpritePriority, 0, sizeof(_hasSpritePriority));
|
|
memcpy(_spritePriority, _spritePriorityCopy, sizeof(_spritePriority));
|
|
for (int i = 0; i < 255; i++)
|
|
{
|
|
if (_spritePriority[i] < 4)
|
|
{
|
|
_hasSpritePriority[_spritePriority[i]] = true;
|
|
}
|
|
}
|
|
|
|
memcpy(_spritePalette, _spritePaletteCopy, sizeof(_spritePalette));
|
|
memcpy(_spriteColors, _spriteColorsCopy, sizeof(_spriteColors));
|
|
|
|
memset(_spriteIndexes, 0xFF, sizeof(_spriteIndexes));
|
|
|
|
memset(_mainScreenFlags, 0, sizeof(_mainScreenFlags));
|
|
memset(_subScreenPriority, 0, sizeof(_subScreenPriority));
|
|
}
|
|
|
|
_scanline++;
|
|
|
|
if (_scanline == _nmiScanline)
|
|
{
|
|
ProcessLocationLatchRequest();
|
|
_latchRequest = false;
|
|
|
|
//Reset OAM address at the start of vblank?
|
|
if (!_state.ForcedVblank)
|
|
{
|
|
//TODO, the timing of this may be slightly off? should happen at H=10 based on anomie's docs
|
|
_internalOamAddress = (_state.OamRamAddress << 1);
|
|
}
|
|
|
|
VideoConfig cfg = _settings->GetVideoConfig();
|
|
_configVisibleLayers = (cfg.HideBgLayer0 ? 0 : 1) | (cfg.HideBgLayer1 ? 0 : 2) | (cfg.HideBgLayer2 ? 0 : 4) | (
|
|
cfg.HideBgLayer3 ? 0 : 8) | (cfg.HideSprites ? 0 : 16);
|
|
|
|
_console->ProcessEvent(EventType::EndFrame);
|
|
|
|
_frameCount++;
|
|
_spc->ProcessEndFrame();
|
|
_regs->SetNmiFlag(true);
|
|
SendFrame();
|
|
|
|
_console->ProcessEndOfFrame();
|
|
}
|
|
else if (_scanline >= _vblankEndScanline + 1)
|
|
{
|
|
//"Frames are 262 scanlines in non-interlace mode, while in interlace mode frames with $213f.7=0 are 263 scanlines"
|
|
_oddFrame ^= 1;
|
|
_regs->SetNmiFlag(false);
|
|
_scanline = 0;
|
|
_rangeOver = false;
|
|
_timeOver = false;
|
|
_console->ProcessEvent(EventType::StartFrame);
|
|
|
|
_skipRender = (
|
|
!_settings->GetVideoConfig().DisableFrameSkipping &&
|
|
!_console->GetRewindManager()->IsRewinding() &&
|
|
!_console->GetVideoRenderer()->IsRecording() &&
|
|
(_settings->GetEmulationSpeed() == 0 || _settings->GetEmulationSpeed() > 150) &&
|
|
_frameSkipTimer.GetElapsedMS() < 10
|
|
);
|
|
|
|
if (_console->IsRunAheadFrame())
|
|
{
|
|
_skipRender = true;
|
|
}
|
|
|
|
//Ensure the SPC is re-enabled for the next frame
|
|
_spc->SetSpcState(true);
|
|
}
|
|
|
|
UpdateSpcState();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void Ppu::UpdateSpcState()
|
|
{
|
|
//When using overclocking, turn off the SPC during the extra scanlines
|
|
if (_overclockEnabled && _scanline > _vblankStartScanline)
|
|
{
|
|
if (_scanline > _adjustedVblankEndScanline)
|
|
{
|
|
//Disable APU for extra lines after NMI
|
|
_spc->SetSpcState(false);
|
|
}
|
|
else if (_scanline >= _vblankStartScanline && _scanline < _nmiScanline)
|
|
{
|
|
//Disable APU for extra lines before NMI
|
|
_spc->SetSpcState(false);
|
|
}
|
|
else
|
|
{
|
|
_spc->SetSpcState(true);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::UpdateNmiScanline()
|
|
{
|
|
EmulationConfig cfg = _settings->GetEmulationConfig();
|
|
if (_console->GetRegion() == ConsoleRegion::Ntsc)
|
|
{
|
|
if (!_state.ScreenInterlace || _oddFrame)
|
|
{
|
|
_baseVblankEndScanline = 261;
|
|
}
|
|
else
|
|
{
|
|
_baseVblankEndScanline = 262;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!_state.ScreenInterlace || _oddFrame)
|
|
{
|
|
_baseVblankEndScanline = 311;
|
|
}
|
|
else
|
|
{
|
|
_baseVblankEndScanline = 312;
|
|
}
|
|
}
|
|
|
|
_overclockEnabled = cfg.PpuExtraScanlinesBeforeNmi > 0 || cfg.PpuExtraScanlinesAfterNmi > 0;
|
|
|
|
_adjustedVblankEndScanline = _baseVblankEndScanline + cfg.PpuExtraScanlinesBeforeNmi;
|
|
_vblankEndScanline = _baseVblankEndScanline + cfg.PpuExtraScanlinesAfterNmi + cfg.PpuExtraScanlinesBeforeNmi;
|
|
_vblankStartScanline = _state.OverscanMode ? 240 : 225;
|
|
_nmiScanline = _vblankStartScanline + cfg.PpuExtraScanlinesBeforeNmi;
|
|
}
|
|
|
|
uint16_t Ppu::GetRealScanline()
|
|
{
|
|
if (!_overclockEnabled)
|
|
{
|
|
return _scanline;
|
|
}
|
|
|
|
if (_scanline > _vblankStartScanline && _scanline <= _nmiScanline)
|
|
{
|
|
//Pretend to be just before vblank until extra scanlines are over
|
|
return _vblankStartScanline - 1;
|
|
}
|
|
else if (_scanline > _nmiScanline)
|
|
{
|
|
if (_scanline > _adjustedVblankEndScanline)
|
|
{
|
|
//Pretend to be at the end of vblank until extra scanlines are over
|
|
return _baseVblankEndScanline;
|
|
}
|
|
else
|
|
{
|
|
//Number the regular scanlines as they would normally be
|
|
return _scanline - _nmiScanline + _vblankStartScanline;
|
|
}
|
|
}
|
|
|
|
return _scanline;
|
|
}
|
|
|
|
uint16_t Ppu::GetVblankEndScanline()
|
|
{
|
|
return _vblankEndScanline;
|
|
}
|
|
|
|
uint16_t Ppu::GetLastScanline()
|
|
{
|
|
return _baseVblankEndScanline;
|
|
}
|
|
|
|
void Ppu::EvaluateNextLineSprites()
|
|
{
|
|
if (_spriteEvalStart == 0)
|
|
{
|
|
_spriteCount = 0;
|
|
_oamEvaluationIndex = _state.EnableOamPriority ? ((_internalOamAddress & 0x1FC) >> 2) : 0;
|
|
}
|
|
|
|
if (_state.ForcedVblank)
|
|
{
|
|
return;
|
|
}
|
|
|
|
for (int i = _spriteEvalStart; i <= _spriteEvalEnd; i++)
|
|
{
|
|
if (!(i & 0x01))
|
|
{
|
|
//First cycle, read X & Y and high oam byte
|
|
FetchSpritePosition(_oamEvaluationIndex << 2);
|
|
}
|
|
else
|
|
{
|
|
//Second cycle: Check if sprite is in range, if so, keep its index
|
|
if (_currentSprite.IsVisible(_scanline, _state.ObjInterlace))
|
|
{
|
|
if (_spriteCount < 32)
|
|
{
|
|
_spriteIndexes[_spriteCount] = _oamEvaluationIndex;
|
|
_spriteCount++;
|
|
}
|
|
else
|
|
{
|
|
_rangeOver = true;
|
|
}
|
|
}
|
|
_oamEvaluationIndex = (_oamEvaluationIndex + 1) & 0x7F;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::FetchSpriteData()
|
|
{
|
|
//From H=272 to 339, fetch a single word of CHR data on every cycle (for up to 34 sprites)
|
|
if (_fetchSpriteStart == 0)
|
|
{
|
|
memset(_spritePriorityCopy, 0xFF, sizeof(_spritePriorityCopy));
|
|
|
|
_spriteTileCount = 0;
|
|
_currentSprite.Index = 0xFF;
|
|
|
|
if (_spriteCount == 0)
|
|
{
|
|
_spriteFetchingDone = true;
|
|
return;
|
|
}
|
|
|
|
_oamTimeIndex = _spriteIndexes[_spriteCount - 1];
|
|
}
|
|
|
|
for (int x = _fetchSpriteStart; x <= _fetchSpriteEnd; x++)
|
|
{
|
|
if (x >= 2)
|
|
{
|
|
//Fetch the tile using the OAM data loaded on the past 2 cycles, before overwriting it in FetchSpriteAttributes below
|
|
if (!_state.ForcedVblank)
|
|
{
|
|
FetchSpriteTile(x & 0x01);
|
|
}
|
|
|
|
if ((x & 1) && _spriteCount == 0 && _currentSprite.ColumnOffset == 0)
|
|
{
|
|
//End this step
|
|
_spriteFetchingDone = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (_spriteCount > 0)
|
|
{
|
|
if (x & 1)
|
|
{
|
|
FetchSpriteAttributes((_oamTimeIndex << 2) | 0x02);
|
|
if (_spriteCount > 0)
|
|
{
|
|
_oamTimeIndex = _spriteIndexes[_spriteCount - 1];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FetchSpritePosition(_oamTimeIndex << 2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::FetchSpritePosition(uint16_t oamAddress)
|
|
{
|
|
uint8_t highTableOffset = oamAddress >> 4;
|
|
uint8_t shift = ((oamAddress >> 1) & 0x06);
|
|
uint8_t highTableValue = _oamRam[0x200 | highTableOffset] >> shift;
|
|
uint8_t largeSprite = (highTableValue & 0x02) >> 1;
|
|
|
|
uint16_t oamValue = _oamRam[oamAddress] | (_oamRam[oamAddress + 1] << 8);
|
|
uint16_t sign = (highTableValue & 0x01) << 8;
|
|
|
|
uint8_t spriteIndex = oamAddress >> 2;
|
|
_currentSprite.X = (int16_t)((sign | (oamValue & 0xFF)) << 7) >> 7;
|
|
_currentSprite.Y = (oamValue >> 8);
|
|
_currentSprite.Width = _oamSizes[_state.OamMode][largeSprite][0] << 3;
|
|
|
|
if (spriteIndex != _currentSprite.Index)
|
|
{
|
|
_currentSprite.Index = oamAddress >> 2;
|
|
_currentSprite.ColumnOffset = (_currentSprite.Width / 8);
|
|
if (_currentSprite.X <= -8 && _currentSprite.X != -256)
|
|
{
|
|
//Skip the first tiles of the sprite (because the tiles are hidden to the left of the screen)
|
|
_currentSprite.ColumnOffset += _currentSprite.X / 8;
|
|
}
|
|
}
|
|
|
|
uint8_t height = _oamSizes[_state.OamMode][largeSprite][1] << 3;
|
|
_currentSprite.Height = height;
|
|
}
|
|
|
|
void Ppu::FetchSpriteAttributes(uint16_t oamAddress)
|
|
{
|
|
_spriteTileCount++;
|
|
if (_spriteTileCount > 34)
|
|
{
|
|
_timeOver = true;
|
|
}
|
|
|
|
uint8_t flags = _oamRam[oamAddress + 1];
|
|
bool useSecondTable = (flags & 0x01) != 0;
|
|
_currentSprite.Palette = (flags >> 1) & 0x07;
|
|
_currentSprite.Priority = (flags >> 4) & 0x03;
|
|
_currentSprite.HorizontalMirror = (flags & 0x40) != 0;
|
|
|
|
_currentSprite.ColumnOffset--;
|
|
|
|
uint8_t yOffset;
|
|
int rowOffset;
|
|
int yGap = (_scanline - _currentSprite.Y);
|
|
if (_state.ObjInterlace)
|
|
{
|
|
yGap <<= 1;
|
|
yGap |= _oddFrame;
|
|
}
|
|
|
|
bool verticalMirror = (flags & 0x80) != 0;
|
|
if (verticalMirror)
|
|
{
|
|
yOffset = (_currentSprite.Height - 1 - yGap) & 0x07;
|
|
rowOffset = (_currentSprite.Height - 1 - yGap) >> 3;
|
|
}
|
|
else
|
|
{
|
|
yOffset = yGap & 0x07;
|
|
rowOffset = yGap >> 3;
|
|
}
|
|
|
|
uint8_t columnCount = (_currentSprite.Width / 8);
|
|
uint8_t tileRow = (_oamRam[oamAddress] & 0xF0) >> 4;
|
|
uint8_t tileColumn = _oamRam[oamAddress] & 0x0F;
|
|
uint8_t row = (tileRow + rowOffset) & 0x0F;
|
|
uint8_t columnOffset = _currentSprite.HorizontalMirror
|
|
? _currentSprite.ColumnOffset
|
|
: (columnCount - _currentSprite.ColumnOffset - 1);
|
|
uint8_t tileIndex = (row << 4) | ((tileColumn + columnOffset) & 0x0F);
|
|
uint16_t tileStart = (_state.OamBaseAddress + (tileIndex << 4) + (useSecondTable ? _state.OamAddressOffset : 0));
|
|
_currentSprite.FetchAddress = (tileStart + yOffset) & 0x7FFF;
|
|
|
|
int16_t x = _currentSprite.X == -256 ? 0 : _currentSprite.X;
|
|
int16_t endTileX = x + ((columnCount - _currentSprite.ColumnOffset - 1) << 3) + 8;
|
|
_currentSprite.DrawX = _currentSprite.X + ((columnCount - _currentSprite.ColumnOffset - 1) << 3);
|
|
|
|
if (_currentSprite.ColumnOffset == 0 || endTileX >= 256)
|
|
{
|
|
//Last tile of the sprite, or skip the remaining tiles (because the tiles are hidden to the right of the screen)
|
|
_spriteCount--;
|
|
_currentSprite.ColumnOffset = 0;
|
|
}
|
|
}
|
|
|
|
void Ppu::FetchSpriteTile(bool secondCycle)
|
|
{
|
|
//The timing for the fetches should be (mostly) accurate (H=272 to 339)
|
|
uint16_t chrData = _vram[_currentSprite.FetchAddress];
|
|
_currentSprite.ChrData[secondCycle] = chrData;
|
|
|
|
if (!secondCycle)
|
|
{
|
|
_currentSprite.FetchAddress = (_currentSprite.FetchAddress + 8) & 0x7FFF;
|
|
}
|
|
else
|
|
{
|
|
int16_t xPos = _currentSprite.DrawX;
|
|
for (int x = 0; x < 8; x++)
|
|
{
|
|
if (xPos + x < 0 || xPos + x > 255)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
uint8_t xOffset = _currentSprite.HorizontalMirror ? ((7 - x) & 0x07) : x;
|
|
uint8_t color = GetTilePixelColor<4>(_currentSprite.ChrData, 7 - xOffset);
|
|
|
|
if (color != 0)
|
|
{
|
|
_spriteColorsCopy[xPos + x] = color;
|
|
_spritePriorityCopy[xPos + x] = _currentSprite.Priority;
|
|
_spritePaletteCopy[xPos + x] = _currentSprite.Palette;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::RenderMode0()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {3, 6, 9, 12};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 2, 8, 11, 0>();
|
|
RenderTilemap<1, 2, 7, 10, 32>();
|
|
RenderTilemap<2, 2, 2, 5, 64>();
|
|
RenderTilemap<3, 2, 1, 4, 96>();
|
|
}
|
|
|
|
void Ppu::RenderMode1()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 4, 7, 10};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 4, 6, 9>();
|
|
RenderTilemap<1, 4, 5, 8>();
|
|
if (!_state.Mode1Bg3Priority)
|
|
{
|
|
RenderTilemap<2, 2, 1, 3>();
|
|
}
|
|
else
|
|
{
|
|
RenderTilemap<2, 2, 1, 11>();
|
|
}
|
|
}
|
|
|
|
void Ppu::RenderMode2()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 4, 6, 8};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 4, 3, 7>();
|
|
RenderTilemap<1, 4, 1, 5>();
|
|
}
|
|
|
|
void Ppu::RenderMode3()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 4, 6, 8};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 8, 3, 7>();
|
|
RenderTilemap<1, 4, 1, 5>();
|
|
}
|
|
|
|
void Ppu::RenderMode4()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 4, 6, 8};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 8, 3, 7>();
|
|
RenderTilemap<1, 2, 1, 5>();
|
|
}
|
|
|
|
void Ppu::RenderMode5()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 4, 6, 8};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 4, 3, 7>();
|
|
RenderTilemap<1, 2, 1, 5>();
|
|
}
|
|
|
|
void Ppu::RenderMode6()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 3, 4, 6};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemap<0, 4, 1, 5>();
|
|
}
|
|
|
|
void Ppu::RenderMode7()
|
|
{
|
|
constexpr uint8_t spritePriorities[4] = {2, 4, 6, 7};
|
|
RenderSprites(spritePriorities);
|
|
|
|
RenderTilemapMode7<0, 3, 3>();
|
|
if (_state.ExtBgEnabled)
|
|
{
|
|
RenderTilemapMode7<1, 1, 5>();
|
|
}
|
|
}
|
|
|
|
void Ppu::RenderScanline()
|
|
{
|
|
int32_t hPos = GetCycle();
|
|
|
|
if (hPos <= 255 || _spriteEvalEnd < 255)
|
|
{
|
|
_spriteEvalEnd = std::min(hPos, 255);
|
|
if (_spriteEvalStart <= _spriteEvalEnd)
|
|
{
|
|
EvaluateNextLineSprites();
|
|
}
|
|
_spriteEvalStart = _spriteEvalEnd + 1;
|
|
}
|
|
|
|
if (!_skipRender && (hPos <= 263 || _fetchBgEnd < 263))
|
|
{
|
|
//Fetch tilemap and tile CHR data, as needed, between H=0 and H=263
|
|
_fetchBgEnd = std::min(hPos, 263);
|
|
if (_fetchBgStart <= _fetchBgEnd)
|
|
{
|
|
FetchTileData();
|
|
}
|
|
_fetchBgStart = _fetchBgEnd + 1;
|
|
}
|
|
|
|
//Render the scanline
|
|
if (!_skipRender && _drawStartX <= 255 && hPos > 22 && _scanline > 0)
|
|
{
|
|
_drawEndX = std::min(hPos - 22, 255);
|
|
|
|
if (_state.ForcedVblank)
|
|
{
|
|
//Forced blank, output black
|
|
memset(_mainScreenBuffer + _drawStartX, 0, (_drawEndX - _drawStartX + 1) * 2);
|
|
memset(_subScreenBuffer + _drawStartX, 0, (_drawEndX - _drawStartX + 1) * 2);
|
|
}
|
|
else
|
|
{
|
|
switch (_state.BgMode)
|
|
{
|
|
case 0: RenderMode0();
|
|
break;
|
|
case 1: RenderMode1();
|
|
break;
|
|
case 2: RenderMode2();
|
|
break;
|
|
case 3: RenderMode3();
|
|
break;
|
|
case 4: RenderMode4();
|
|
break;
|
|
case 5: RenderMode5();
|
|
break;
|
|
case 6: RenderMode6();
|
|
break;
|
|
case 7: RenderMode7();
|
|
break;
|
|
}
|
|
RenderBgColor();
|
|
}
|
|
|
|
ApplyColorMath();
|
|
ApplyBrightness<true>();
|
|
ApplyHiResMode();
|
|
|
|
_drawStartX = _drawEndX + 1;
|
|
}
|
|
|
|
if (hPos >= 270 && !_spriteFetchingDone)
|
|
{
|
|
//Fetch sprite data from OAM and calculated which CHR data needs to be loaded (between H=270 and H=337)
|
|
//Fetch sprite CHR data, as needed, between H=272 and H=339
|
|
_fetchSpriteEnd = std::min(hPos - 270, 69);
|
|
if (_fetchSpriteStart <= _fetchSpriteEnd)
|
|
{
|
|
FetchSpriteData();
|
|
}
|
|
_fetchSpriteStart = _fetchSpriteEnd + 1;
|
|
}
|
|
}
|
|
|
|
void Ppu::RenderBgColor()
|
|
{
|
|
uint8_t pixelFlags = (_state.ColorMathEnabled & 0x20) ? PixelFlags::AllowColorMath : 0;
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
if ((_mainScreenFlags[x] & 0x0F) == 0)
|
|
{
|
|
_mainScreenBuffer[x] = _cgram[0];
|
|
_mainScreenFlags[x] = pixelFlags;
|
|
}
|
|
if (_subScreenPriority[x] == 0)
|
|
{
|
|
_subScreenBuffer[x] = _cgram[0];
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::RenderSprites(const uint8_t priority[4])
|
|
{
|
|
if (!IsRenderRequired(Ppu::SpriteLayerIndex))
|
|
{
|
|
return;
|
|
}
|
|
|
|
bool drawMain = (bool)(((_state.MainScreenLayers & _configVisibleLayers) >> Ppu::SpriteLayerIndex) & 0x01);
|
|
bool drawSub = (bool)(((_state.SubScreenLayers & _configVisibleLayers) >> Ppu::SpriteLayerIndex) & 0x01);
|
|
|
|
uint8_t mainWindowCount = 0;
|
|
uint8_t subWindowCount = 0;
|
|
if (_state.WindowMaskMain[Ppu::SpriteLayerIndex])
|
|
{
|
|
mainWindowCount = (uint8_t)_state.Window[0].ActiveLayers[Ppu::SpriteLayerIndex] + (uint8_t)_state.Window[1].
|
|
ActiveLayers[Ppu::SpriteLayerIndex];
|
|
}
|
|
if (_state.WindowMaskSub[Ppu::SpriteLayerIndex])
|
|
{
|
|
subWindowCount = (uint8_t)_state.Window[0].ActiveLayers[Ppu::SpriteLayerIndex] + (uint8_t)_state.Window[1].
|
|
ActiveLayers[Ppu::SpriteLayerIndex];
|
|
}
|
|
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
if (_spritePriority[x] <= 3)
|
|
{
|
|
uint8_t spritePrio = priority[_spritePriority[x]];
|
|
if (drawMain && ((_mainScreenFlags[x] & 0x0F) < spritePrio) && !ProcessMaskWindow<Ppu::SpriteLayerIndex>(
|
|
mainWindowCount, x))
|
|
{
|
|
uint16_t paletteRamOffset = 128 + (_spritePalette[x] << 4) + _spriteColors[x];
|
|
_mainScreenBuffer[x] = _cgram[paletteRamOffset];
|
|
_mainScreenFlags[x] = spritePrio | (((_state.ColorMathEnabled & 0x10) && _spritePalette[x] > 3)
|
|
? PixelFlags::AllowColorMath
|
|
: 0);
|
|
}
|
|
|
|
if (drawSub && (_subScreenPriority[x] < spritePrio) && !ProcessMaskWindow<Ppu::SpriteLayerIndex>(
|
|
subWindowCount, x))
|
|
{
|
|
uint16_t paletteRamOffset = 128 + (_spritePalette[x] << 4) + _spriteColors[x];
|
|
_subScreenBuffer[x] = _cgram[paletteRamOffset];
|
|
_subScreenPriority[x] = spritePrio;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <uint8_t layerIndex, uint8_t bpp, uint8_t normalPriority, uint8_t highPriority, uint16_t basePaletteOffset,
|
|
bool hiResMode, bool applyMosaic, bool directColorMode>
|
|
void Ppu::RenderTilemap()
|
|
{
|
|
bool drawMain = (bool)(((_state.MainScreenLayers & _configVisibleLayers) >> layerIndex) & 0x01);
|
|
bool drawSub = (bool)(((_state.SubScreenLayers & _configVisibleLayers) >> layerIndex) & 0x01);
|
|
|
|
uint8_t mainWindowCount = _state.WindowMaskMain[layerIndex]
|
|
? (uint8_t)_state.Window[0].ActiveLayers[layerIndex] + (uint8_t)_state.Window[1].
|
|
ActiveLayers[layerIndex]
|
|
: 0;
|
|
uint8_t subWindowCount = _state.WindowMaskSub[layerIndex]
|
|
? (uint8_t)_state.Window[0].ActiveLayers[layerIndex] + (uint8_t)_state.Window[1].
|
|
ActiveLayers[layerIndex]
|
|
: 0;
|
|
|
|
uint16_t hScrollOriginal = _state.Layers[layerIndex].HScroll;
|
|
uint16_t hScroll = hiResMode ? (hScrollOriginal << 1) : hScrollOriginal;
|
|
|
|
TileData* tileData = _layerData[layerIndex].Tiles;
|
|
|
|
uint8_t mosaicCounter = applyMosaic ? _state.MosaicSize - (_drawStartX % _state.MosaicSize) : 0;
|
|
|
|
uint8_t lookupIndex;
|
|
uint8_t chrDataOffset;
|
|
uint8_t hiresSubColor;
|
|
uint8_t pixelFlags = (((_state.ColorMathEnabled >> layerIndex) & 0x01) ? PixelFlags::AllowColorMath : 0);
|
|
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
if (hiResMode)
|
|
{
|
|
lookupIndex = (x + (hScrollOriginal & 0x07)) >> 2;
|
|
chrDataOffset = (lookupIndex & 0x01) * bpp / 2;
|
|
lookupIndex >>= 1;
|
|
}
|
|
else
|
|
{
|
|
lookupIndex = (x + (hScrollOriginal & 0x07)) >> 3;
|
|
}
|
|
|
|
uint16_t tilemapData = tileData[lookupIndex].TilemapData;
|
|
uint16_t* chrData = tileData[lookupIndex].ChrData;
|
|
bool hMirror = (tilemapData & 0x4000) != 0;
|
|
|
|
uint8_t color;
|
|
if (hiResMode)
|
|
{
|
|
uint8_t xOffset = ((x << 1) + 1 + hScroll) & 0x07;
|
|
uint8_t shift = hMirror ? xOffset : (7 - xOffset);
|
|
color = GetTilePixelColor<bpp>(chrData + chrDataOffset, shift);
|
|
|
|
xOffset = ((x << 1) + hScroll) & 0x07;
|
|
shift = hMirror ? xOffset : (7 - xOffset);
|
|
hiresSubColor = GetTilePixelColor<bpp>(chrData + chrDataOffset, shift);
|
|
}
|
|
else
|
|
{
|
|
uint8_t xOffset = (x + hScroll) & 0x07;
|
|
uint8_t shift = hMirror ? xOffset : (7 - xOffset);
|
|
color = GetTilePixelColor<bpp>(chrData, shift);
|
|
}
|
|
|
|
uint8_t paletteIndex = (tilemapData >> 10) & 0x07;
|
|
uint8_t priority = (tilemapData & 0x2000) ? highPriority : normalPriority;
|
|
|
|
if (applyMosaic)
|
|
{
|
|
if (mosaicCounter == _state.MosaicSize)
|
|
{
|
|
mosaicCounter = 1;
|
|
if (hiResMode)
|
|
{
|
|
color = hiresSubColor;
|
|
}
|
|
_mosaicColor[layerIndex] = (paletteIndex << 8) | color;
|
|
_mosaicPriority[layerIndex] = priority;
|
|
}
|
|
else
|
|
{
|
|
mosaicCounter++;
|
|
color = _mosaicColor[layerIndex] & 0xFF;
|
|
paletteIndex = _mosaicColor[layerIndex] >> 8;
|
|
priority = _mosaicPriority[layerIndex];
|
|
if (hiResMode)
|
|
{
|
|
hiresSubColor = color;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (color > 0)
|
|
{
|
|
uint16_t rgbColor = GetRgbColor<bpp, directColorMode, basePaletteOffset>(paletteIndex, color);
|
|
if (drawMain && (_mainScreenFlags[x] & 0x0F) < priority && !ProcessMaskWindow<layerIndex>(mainWindowCount, x))
|
|
{
|
|
DrawMainPixel(x, rgbColor, priority | pixelFlags);
|
|
}
|
|
if (!hiResMode && drawSub && _subScreenPriority[x] < priority && !ProcessMaskWindow<layerIndex>(
|
|
subWindowCount, x))
|
|
{
|
|
DrawSubPixel(x, rgbColor, priority);
|
|
}
|
|
}
|
|
|
|
if (hiResMode)
|
|
{
|
|
if (hiresSubColor > 0 && drawSub && _subScreenPriority[x] < priority && !ProcessMaskWindow<layerIndex>(
|
|
subWindowCount, x))
|
|
{
|
|
uint16_t hiresSubRgbColor = GetRgbColor<bpp, directColorMode, basePaletteOffset>(
|
|
paletteIndex, hiresSubColor);
|
|
DrawSubPixel(x, hiresSubRgbColor, priority);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <uint8_t bpp, bool directColorMode, uint8_t basePaletteOffset>
|
|
uint16_t Ppu::GetRgbColor(uint8_t paletteIndex, uint8_t colorIndex)
|
|
{
|
|
if (bpp == 8 && directColorMode)
|
|
{
|
|
return (
|
|
((((colorIndex & 0x07) << 1) | (paletteIndex & 0x01)) << 1) |
|
|
(((colorIndex & 0x38) | ((paletteIndex & 0x02) << 1)) << 4) |
|
|
(((colorIndex & 0xC0) | ((paletteIndex & 0x04) << 3)) << 7)
|
|
);
|
|
}
|
|
else if (bpp == 8)
|
|
{
|
|
//Ignore palette bits for 256-color layers
|
|
return _cgram[basePaletteOffset + colorIndex];
|
|
}
|
|
else
|
|
{
|
|
return _cgram[basePaletteOffset + paletteIndex * (1 << bpp) + colorIndex];
|
|
}
|
|
}
|
|
|
|
bool Ppu::IsRenderRequired(uint8_t layerIndex)
|
|
{
|
|
if (((_state.MainScreenLayers & _configVisibleLayers) >> layerIndex) & 0x01)
|
|
{
|
|
return true;
|
|
}
|
|
if (((_state.SubScreenLayers & _configVisibleLayers) >> layerIndex) & 0x01)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
template <uint8_t bpp>
|
|
uint8_t Ppu::GetTilePixelColor(const uint16_t chrData[4], const uint8_t shift)
|
|
{
|
|
uint8_t color;
|
|
if (bpp == 2)
|
|
{
|
|
color = (chrData[0] >> shift) & 0x01;
|
|
color |= (chrData[0] >> (7 + shift)) & 0x02;
|
|
}
|
|
else if (bpp == 4)
|
|
{
|
|
color = (chrData[0] >> shift) & 0x01;
|
|
color |= (chrData[0] >> (7 + shift)) & 0x02;
|
|
color |= ((chrData[1] >> shift) & 0x01) << 2;
|
|
color |= ((chrData[1] >> (7 + shift)) & 0x02) << 2;
|
|
}
|
|
else if (bpp == 8)
|
|
{
|
|
color = (chrData[0] >> shift) & 0x01;
|
|
color |= (chrData[0] >> (7 + shift)) & 0x02;
|
|
color |= ((chrData[1] >> shift) & 0x01) << 2;
|
|
color |= ((chrData[1] >> (7 + shift)) & 0x02) << 2;
|
|
color |= ((chrData[2] >> shift) & 0x01) << 4;
|
|
color |= ((chrData[2] >> (7 + shift)) & 0x02) << 4;
|
|
color |= ((chrData[3] >> shift) & 0x01) << 6;
|
|
color |= ((chrData[3] >> (7 + shift)) & 0x02) << 6;
|
|
}
|
|
else
|
|
{
|
|
throw std::runtime_error("unsupported bpp");
|
|
}
|
|
return color;
|
|
}
|
|
|
|
template <uint8_t layerIndex, uint8_t normalPriority, uint8_t highPriority, bool applyMosaic, bool directColorMode>
|
|
void Ppu::RenderTilemapMode7()
|
|
{
|
|
uint8_t mainWindowCount = _state.WindowMaskMain[layerIndex]
|
|
? (uint8_t)_state.Window[0].ActiveLayers[layerIndex] + (uint8_t)_state.Window[1].
|
|
ActiveLayers[layerIndex]
|
|
: 0;
|
|
uint8_t subWindowCount = _state.WindowMaskSub[layerIndex]
|
|
? (uint8_t)_state.Window[0].ActiveLayers[layerIndex] + (uint8_t)_state.Window[1].
|
|
ActiveLayers[layerIndex]
|
|
: 0;
|
|
|
|
bool drawMain = (bool)(((_state.MainScreenLayers & _configVisibleLayers) >> layerIndex) & 0x01);
|
|
bool drawSub = (bool)(((_state.SubScreenLayers & _configVisibleLayers) >> layerIndex) & 0x01);
|
|
|
|
auto clip = [](int32_t val) { return (val & 0x2000) ? (val | ~0x3ff) : (val & 0x3ff); };
|
|
|
|
if (_drawStartX == 0)
|
|
{
|
|
//Keep the same scroll offsets for the entire scanline
|
|
_state.Mode7.HScrollLatch = _state.Mode7.HScroll;
|
|
_state.Mode7.VScrollLatch = _state.Mode7.VScroll;
|
|
}
|
|
|
|
int32_t hScroll = ((int32_t)_state.Mode7.HScrollLatch << 19) >> 19;
|
|
int32_t vScroll = ((int32_t)_state.Mode7.VScrollLatch << 19) >> 19;
|
|
int32_t centerX = ((int32_t)_state.Mode7.CenterX << 19) >> 19;
|
|
int32_t centerY = ((int32_t)_state.Mode7.CenterY << 19) >> 19;
|
|
uint16_t realY = _state.Mode7.VerticalMirroring ? (255 - _scanline) : _scanline;
|
|
|
|
if (applyMosaic)
|
|
{
|
|
//Keep the "scanline" to what it was at the start of this mosaic block
|
|
realY -= _state.MosaicSize - _mosaicScanlineCounter;
|
|
}
|
|
uint8_t mosaicCounter = applyMosaic ? _state.MosaicSize - (_drawStartX % _state.MosaicSize) : 0;
|
|
|
|
int32_t xValue = (
|
|
((_state.Mode7.Matrix[0] * clip(hScroll - centerX)) & ~63) +
|
|
((_state.Mode7.Matrix[1] * realY) & ~63) +
|
|
((_state.Mode7.Matrix[1] * clip(vScroll - centerY)) & ~63) +
|
|
(centerX << 8)
|
|
);
|
|
|
|
int32_t yValue = (
|
|
((_state.Mode7.Matrix[2] * clip(hScroll - centerX)) & ~63) +
|
|
((_state.Mode7.Matrix[3] * realY) & ~63) +
|
|
((_state.Mode7.Matrix[3] * clip(vScroll - centerY)) & ~63) +
|
|
(centerY << 8)
|
|
);
|
|
|
|
int16_t xStep = _state.Mode7.Matrix[0];
|
|
int16_t yStep = _state.Mode7.Matrix[2];
|
|
if (_state.Mode7.HorizontalMirroring)
|
|
{
|
|
//Calculate the value at the end of the scanline, and then start going backwards
|
|
xValue += xStep * _drawEndX;
|
|
yValue += yStep * _drawEndX;
|
|
xStep = -xStep;
|
|
yStep = -yStep;
|
|
}
|
|
|
|
xValue += xStep * _drawStartX;
|
|
yValue += yStep * _drawStartX;
|
|
|
|
uint8_t pixelFlags = ((_state.ColorMathEnabled >> layerIndex) & 0x01) ? PixelFlags::AllowColorMath : 0;
|
|
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
int32_t xOffset = xValue >> 8;
|
|
int32_t yOffset = yValue >> 8;
|
|
xValue += xStep;
|
|
yValue += yStep;
|
|
|
|
uint8_t tileIndex;
|
|
if (!_state.Mode7.LargeMap)
|
|
{
|
|
yOffset &= 0x3FF;
|
|
xOffset &= 0x3FF;
|
|
tileIndex = (uint8_t)_vram[((yOffset & ~0x07) << 4) | (xOffset >> 3)];
|
|
}
|
|
else
|
|
{
|
|
if (yOffset < 0 || yOffset > 0x3FF || xOffset < 0 || xOffset > 0x3FF)
|
|
{
|
|
if (_state.Mode7.FillWithTile0)
|
|
{
|
|
tileIndex = 0;
|
|
}
|
|
else
|
|
{
|
|
//Draw nothing for this pixel, we're outside the map
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
tileIndex = (uint8_t)_vram[((yOffset & ~0x07) << 4) | (xOffset >> 3)];
|
|
}
|
|
}
|
|
|
|
uint16_t colorIndex;
|
|
uint8_t priority;
|
|
if (layerIndex == 1)
|
|
{
|
|
uint8_t color = _vram[((tileIndex << 6) + ((yOffset & 0x07) << 3) + (xOffset & 0x07))] >> 8;
|
|
priority = (color & 0x80) ? highPriority : normalPriority;
|
|
colorIndex = (color & 0x7F);
|
|
}
|
|
else
|
|
{
|
|
priority = normalPriority;
|
|
colorIndex = _vram[((tileIndex << 6) + ((yOffset & 0x07) << 3) + (xOffset & 0x07))] >> 8;
|
|
}
|
|
|
|
if (applyMosaic)
|
|
{
|
|
if (mosaicCounter == _state.MosaicSize)
|
|
{
|
|
mosaicCounter = 1;
|
|
_mosaicColor[layerIndex] = colorIndex;
|
|
_mosaicPriority[layerIndex] = priority;
|
|
}
|
|
else
|
|
{
|
|
mosaicCounter++;
|
|
colorIndex = _mosaicColor[layerIndex];
|
|
priority = _mosaicPriority[layerIndex];
|
|
}
|
|
}
|
|
|
|
if (colorIndex > 0)
|
|
{
|
|
uint16_t paletteColor;
|
|
if (directColorMode)
|
|
{
|
|
paletteColor = ((colorIndex & 0x07) << 2) | ((colorIndex & 0x38) << 4) | ((colorIndex & 0xC0) << 7);
|
|
}
|
|
else
|
|
{
|
|
paletteColor = _cgram[colorIndex];
|
|
}
|
|
|
|
if (drawMain && (_mainScreenFlags[x] & 0x0F) < priority && !ProcessMaskWindow<layerIndex>(mainWindowCount, x))
|
|
{
|
|
DrawMainPixel(x, paletteColor, priority | pixelFlags);
|
|
}
|
|
|
|
if (drawSub && _subScreenPriority[x] < priority && !ProcessMaskWindow<layerIndex>(subWindowCount, x))
|
|
{
|
|
DrawSubPixel(x, paletteColor, priority);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::DrawMainPixel(uint8_t x, uint16_t color, uint8_t flags)
|
|
{
|
|
_mainScreenBuffer[x] = color;
|
|
_mainScreenFlags[x] = flags;
|
|
}
|
|
|
|
void Ppu::DrawSubPixel(uint8_t x, uint16_t color, uint8_t priority)
|
|
{
|
|
_subScreenBuffer[x] = color;
|
|
_subScreenPriority[x] = priority;
|
|
}
|
|
|
|
void Ppu::ApplyColorMath()
|
|
{
|
|
uint8_t activeWindowCount = (uint8_t)_state.Window[0].ActiveLayers[Ppu::ColorWindowIndex] + (uint8_t)_state.Window[1]
|
|
.ActiveLayers[Ppu::ColorWindowIndex];
|
|
bool hiResMode = _state.HiResMode || _state.BgMode == 5 || _state.BgMode == 6;
|
|
|
|
if (hiResMode)
|
|
{
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
bool isInsideWindow = ProcessMaskWindow<Ppu::ColorWindowIndex>(activeWindowCount, x);
|
|
|
|
//Keep original subscreen color, which is used to apply color math to the main screen after
|
|
uint16_t subPixel = _subScreenBuffer[x];
|
|
//Apply the color math based on the previous main pixel
|
|
uint16_t prevMainPixel = x > 0 ? _mainScreenBuffer[x - 1] : 0;
|
|
int prevX = x > 0 ? x - 1 : 0;
|
|
ApplyColorMathToPixel(_subScreenBuffer[x], prevMainPixel, prevX, isInsideWindow);
|
|
|
|
ApplyColorMathToPixel(_mainScreenBuffer[x], subPixel, x, isInsideWindow);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
bool isInsideWindow = ProcessMaskWindow<Ppu::ColorWindowIndex>(activeWindowCount, x);
|
|
ApplyColorMathToPixel(_mainScreenBuffer[x], _subScreenBuffer[x], x, isInsideWindow);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::ApplyColorMathToPixel(uint16_t& pixelA, uint16_t pixelB, int x, bool isInsideWindow)
|
|
{
|
|
uint8_t halfShift = (uint8_t)_state.ColorMathHalveResult;
|
|
|
|
//Set color to black as needed based on clip mode
|
|
switch (_state.ColorMathClipMode)
|
|
{
|
|
default:
|
|
case ColorWindowMode::Never: break;
|
|
|
|
case ColorWindowMode::OutsideWindow:
|
|
if (!isInsideWindow)
|
|
{
|
|
pixelA = 0;
|
|
halfShift = 0;
|
|
}
|
|
break;
|
|
|
|
case ColorWindowMode::InsideWindow:
|
|
if (isInsideWindow)
|
|
{
|
|
pixelA = 0;
|
|
halfShift = 0;
|
|
}
|
|
break;
|
|
|
|
case ColorWindowMode::Always: pixelA = 0;
|
|
break;
|
|
}
|
|
|
|
if (!(_mainScreenFlags[x] & PixelFlags::AllowColorMath))
|
|
{
|
|
//Color math doesn't apply to this pixel
|
|
return;
|
|
}
|
|
|
|
//Prevent color math as needed based on mode
|
|
switch (_state.ColorMathPreventMode)
|
|
{
|
|
default:
|
|
case ColorWindowMode::Never: break;
|
|
|
|
case ColorWindowMode::OutsideWindow:
|
|
if (!isInsideWindow)
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case ColorWindowMode::InsideWindow:
|
|
if (isInsideWindow)
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case ColorWindowMode::Always: return;
|
|
}
|
|
|
|
uint16_t otherPixel;
|
|
if (_state.ColorMathAddSubscreen)
|
|
{
|
|
if (_subScreenPriority[x] > 0)
|
|
{
|
|
otherPixel = pixelB;
|
|
}
|
|
else
|
|
{
|
|
//there's nothing in the subscreen at this pixel, use the fixed color and disable halve operation
|
|
otherPixel = _state.FixedColor;
|
|
halfShift = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
otherPixel = _state.FixedColor;
|
|
}
|
|
|
|
constexpr unsigned int mask = 0x1F;
|
|
if (_state.ColorMathSubstractMode)
|
|
{
|
|
uint16_t r = std::max((int)((pixelA & mask) - (otherPixel & mask)), 0) >> halfShift;
|
|
uint16_t g = std::max((int)(((pixelA >> 5U) & mask) - ((otherPixel >> 5U) & mask)), 0) >> halfShift;
|
|
uint16_t b = std::max((int)(((pixelA >> 10U) & mask) - ((otherPixel >> 10U) & mask)), 0) >> halfShift;
|
|
|
|
pixelA = r | (g << 5U) | (b << 10U);
|
|
}
|
|
else
|
|
{
|
|
uint16_t r = std::min(((pixelA & mask) + (otherPixel & mask)) >> halfShift, mask);
|
|
uint16_t g = std::min((((pixelA >> 5U) & mask) + ((otherPixel >> 5U) & mask)) >> halfShift, mask);
|
|
uint16_t b = std::min((((pixelA >> 10U) & mask) + ((otherPixel >> 10U) & mask)) >> halfShift, mask);
|
|
|
|
pixelA = r | (g << 5U) | (b << 10U);
|
|
}
|
|
}
|
|
|
|
template <bool forMainScreen>
|
|
void Ppu::ApplyBrightness()
|
|
{
|
|
if (_state.ScreenBrightness != 15)
|
|
{
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
uint16_t& pixel = (forMainScreen ? _mainScreenBuffer : _subScreenBuffer)[x];
|
|
uint16_t r = (pixel & 0x1F) * _state.ScreenBrightness / 15;
|
|
uint16_t g = ((pixel >> 5) & 0x1F) * _state.ScreenBrightness / 15;
|
|
uint16_t b = ((pixel >> 10) & 0x1F) * _state.ScreenBrightness / 15;
|
|
pixel = r | (g << 5) | (b << 10);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::ConvertToHiRes()
|
|
{
|
|
bool useHighResOutput = _useHighResOutput || IsDoubleWidth() || _state.ScreenInterlace;
|
|
if (!useHighResOutput || _useHighResOutput == useHighResOutput || _scanline >= _vblankStartScanline || _scanline == 0
|
|
)
|
|
{
|
|
return;
|
|
}
|
|
|
|
//Convert standard res picture to high resolution when the PPU starts drawing in high res mid frame
|
|
_useHighResOutput = useHighResOutput;
|
|
|
|
uint16_t scanline = _overscanFrame ? (_scanline - 1) : (_scanline + 6);
|
|
|
|
if (_drawStartX > 0)
|
|
{
|
|
for (int x = 0; x < _drawStartX; x++)
|
|
{
|
|
_currentBuffer[(scanline << 10) + (x << 1)] = _currentBuffer[(scanline << 8) + x];
|
|
_currentBuffer[(scanline << 10) + (x << 1) + 1] = _currentBuffer[(scanline << 8) + x];
|
|
}
|
|
memcpy(_currentBuffer + (scanline << 10) + 512, _currentBuffer + (scanline << 10), 512 * sizeof(uint16_t));
|
|
}
|
|
|
|
for (int i = scanline - 1; i >= 0; i--)
|
|
{
|
|
for (int x = 0; x < 256; x++)
|
|
{
|
|
_currentBuffer[(i << 10) + (x << 1)] = _currentBuffer[(i << 8) + x];
|
|
_currentBuffer[(i << 10) + (x << 1) + 1] = _currentBuffer[(i << 8) + x];
|
|
}
|
|
memcpy(_currentBuffer + (i << 10) + 512, _currentBuffer + (i << 10), 512 * sizeof(uint16_t));
|
|
}
|
|
}
|
|
|
|
void Ppu::ApplyHiResMode()
|
|
{
|
|
//When overscan mode is off, center the 224-line picture in the center of the 239-line output buffer
|
|
uint16_t scanline = _overscanFrame ? (_scanline - 1) : (_scanline + 6);
|
|
|
|
if (!_useHighResOutput)
|
|
{
|
|
memcpy(_currentBuffer + (scanline << 8) + _drawStartX, _mainScreenBuffer + _drawStartX,
|
|
(_drawEndX - _drawStartX + 1) << 1);
|
|
}
|
|
else
|
|
{
|
|
_interlacedFrame |= _state.ScreenInterlace;
|
|
uint32_t screenY = _state.ScreenInterlace
|
|
? (_oddFrame ? ((scanline << 1) + 1) : (scanline << 1))
|
|
: (scanline << 1);
|
|
uint32_t baseAddr = (screenY << 9);
|
|
|
|
if (IsDoubleWidth())
|
|
{
|
|
ApplyBrightness<false>();
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
_currentBuffer[baseAddr + (x << 1)] = _subScreenBuffer[x];
|
|
_currentBuffer[baseAddr + (x << 1) + 1] = _mainScreenBuffer[x];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (int x = _drawStartX; x <= _drawEndX; x++)
|
|
{
|
|
_currentBuffer[baseAddr + (x << 1)] = _mainScreenBuffer[x];
|
|
_currentBuffer[baseAddr + (x << 1) + 1] = _mainScreenBuffer[x];
|
|
}
|
|
}
|
|
|
|
if (!_state.ScreenInterlace)
|
|
{
|
|
//Copy this line's content to the next line (between the current start & end bounds)
|
|
memcpy(
|
|
_currentBuffer + baseAddr + 512 + (_drawStartX << 1),
|
|
_currentBuffer + baseAddr + (_drawStartX << 1),
|
|
(_drawEndX - _drawStartX + 1) << 2
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
template <uint8_t layerIndex>
|
|
bool Ppu::ProcessMaskWindow(uint8_t activeWindowCount, int x)
|
|
{
|
|
switch (activeWindowCount)
|
|
{
|
|
case 1:
|
|
if (_state.Window[0].ActiveLayers[layerIndex])
|
|
{
|
|
return _state.Window[0].PixelNeedsMasking<layerIndex>(x);
|
|
}
|
|
return _state.Window[1].PixelNeedsMasking<layerIndex>(x);
|
|
|
|
case 2:
|
|
switch (_state.MaskLogic[layerIndex])
|
|
{
|
|
default:
|
|
case WindowMaskLogic::Or: return _state.Window[0].PixelNeedsMasking<layerIndex>(x) | _state.Window[1].
|
|
PixelNeedsMasking<layerIndex>(x);
|
|
case WindowMaskLogic::And: return _state.Window[0].PixelNeedsMasking<layerIndex>(x) & _state.Window[1].
|
|
PixelNeedsMasking<layerIndex>(x);
|
|
case WindowMaskLogic::Xor: return _state.Window[0].PixelNeedsMasking<layerIndex>(x) ^ _state.Window[1].
|
|
PixelNeedsMasking<layerIndex>(x);
|
|
case WindowMaskLogic::Xnor: return !(_state.Window[0].PixelNeedsMasking<layerIndex>(x) ^ _state.Window[1].
|
|
PixelNeedsMasking<layerIndex>(x));
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void Ppu::ProcessWindowMaskSettings(uint8_t value, uint8_t offset)
|
|
{
|
|
_state.Window[0].ActiveLayers[0 + offset] = (value & 0x02) != 0;
|
|
_state.Window[0].ActiveLayers[1 + offset] = (value & 0x20) != 0;
|
|
_state.Window[0].InvertedLayers[0 + offset] = (value & 0x01) != 0;
|
|
_state.Window[0].InvertedLayers[1 + offset] = (value & 0x10) != 0;
|
|
|
|
_state.Window[1].ActiveLayers[0 + offset] = (value & 0x08) != 0;
|
|
_state.Window[1].ActiveLayers[1 + offset] = (value & 0x80) != 0;
|
|
_state.Window[1].InvertedLayers[0 + offset] = (value & 0x04) != 0;
|
|
_state.Window[1].InvertedLayers[1 + offset] = (value & 0x40) != 0;
|
|
}
|
|
|
|
void Ppu::SendFrame()
|
|
{
|
|
uint16_t width = _useHighResOutput ? 512 : 256;
|
|
uint16_t height = _useHighResOutput ? 478 : 239;
|
|
|
|
if (!_overscanFrame)
|
|
{
|
|
//Clear the top 7 and bottom 8 rows
|
|
int top = (_useHighResOutput ? 14 : 7);
|
|
int bottom = (_useHighResOutput ? 16 : 8);
|
|
memset(_currentBuffer, 0, width * top * sizeof(uint16_t));
|
|
memset(_currentBuffer + width * (height - bottom), 0, width * bottom * sizeof(uint16_t));
|
|
}
|
|
|
|
_console->GetNotificationManager()->SendNotification(ConsoleNotificationType::PpuFrameDone);
|
|
|
|
bool isRewinding = _console->GetRewindManager()->IsRewinding();
|
|
|
|
#ifdef LIBRETRO
|
|
_console->GetVideoDecoder()->UpdateFrameSync(_currentBuffer, width, height, _frameCount, isRewinding);
|
|
#else
|
|
if (isRewinding || _interlacedFrame)
|
|
{
|
|
_console->GetVideoDecoder()->UpdateFrameSync(_currentBuffer, width, height, _frameCount, isRewinding);
|
|
}
|
|
else
|
|
{
|
|
_console->GetVideoDecoder()->UpdateFrame(_currentBuffer, width, height, _frameCount);
|
|
}
|
|
#endif
|
|
|
|
if (!_skipRender)
|
|
{
|
|
_frameSkipTimer.Reset();
|
|
}
|
|
}
|
|
|
|
|
|
bool Ppu::IsHighResOutput()
|
|
{
|
|
return _useHighResOutput;
|
|
}
|
|
|
|
uint16_t* Ppu::GetScreenBuffer()
|
|
{
|
|
return _currentBuffer;
|
|
}
|
|
|
|
uint16_t* Ppu::GetPreviousScreenBuffer()
|
|
{
|
|
return _currentBuffer == _outputBuffers[0] ? _outputBuffers[1] : _outputBuffers[0];
|
|
}
|
|
|
|
uint8_t* Ppu::GetVideoRam()
|
|
{
|
|
return (uint8_t*)_vram;
|
|
}
|
|
|
|
uint8_t* Ppu::GetCgRam()
|
|
{
|
|
return (uint8_t*)_cgram;
|
|
}
|
|
|
|
uint8_t* Ppu::GetSpriteRam()
|
|
{
|
|
return (uint8_t*)_oamRam;
|
|
}
|
|
|
|
bool Ppu::IsDoubleHeight()
|
|
{
|
|
return _state.ScreenInterlace && (_state.BgMode == 5 || _state.BgMode == 6);
|
|
}
|
|
|
|
bool Ppu::IsDoubleWidth()
|
|
{
|
|
return _state.HiResMode || _state.BgMode == 5 || _state.BgMode == 6;
|
|
}
|
|
|
|
void Ppu::SetLocationLatchRequest(uint16_t x, uint16_t y)
|
|
{
|
|
//Used by super scope
|
|
_latchRequest = true;
|
|
_latchRequestX = x;
|
|
_latchRequestY = y;
|
|
}
|
|
|
|
void Ppu::ProcessLocationLatchRequest()
|
|
{
|
|
//Used by super scope
|
|
if (_latchRequest)
|
|
{
|
|
uint16_t cycle = GetCycle();
|
|
uint16_t scanline = GetRealScanline();
|
|
if (scanline > _latchRequestY || (_latchRequestY == scanline && cycle >= _latchRequestX))
|
|
{
|
|
_latchRequest = false;
|
|
_horizontalLocation = _latchRequestX;
|
|
_verticalLocation = _latchRequestY;
|
|
_locationLatched = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::LatchLocationValues()
|
|
{
|
|
_horizontalLocation = GetCycle();
|
|
_verticalLocation = GetRealScanline();
|
|
_locationLatched = true;
|
|
}
|
|
|
|
void Ppu::UpdateOamAddress()
|
|
{
|
|
_internalOamAddress = (_state.OamRamAddress << 1);
|
|
}
|
|
|
|
uint16_t Ppu::GetOamAddress()
|
|
{
|
|
if (_state.ForcedVblank || _scanline >= _vblankStartScanline)
|
|
{
|
|
return _internalOamAddress;
|
|
}
|
|
else
|
|
{
|
|
if (_memoryManager->GetHClock() <= 255 * 4)
|
|
{
|
|
return _oamEvaluationIndex << 2;
|
|
}
|
|
else
|
|
{
|
|
return _oamTimeIndex << 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Ppu::UpdateVramReadBuffer()
|
|
{
|
|
uint16_t addr = GetVramAddress();
|
|
_state.VramReadBuffer = _vram[addr];
|
|
}
|
|
|
|
uint16_t Ppu::GetVramAddress()
|
|
{
|
|
uint16_t addr = _state.VramAddress;
|
|
switch (_state.VramAddressRemapping)
|
|
{
|
|
default:
|
|
case 0: return addr;
|
|
case 1: return (addr & 0xFF00) | ((addr & 0xE0) >> 5) | ((addr & 0x1F) << 3);
|
|
case 2: return (addr & 0xFE00) | ((addr & 0x1C0) >> 6) | ((addr & 0x3F) << 3);
|
|
case 3: return (addr & 0xFC00) | ((addr & 0x380) >> 7) | ((addr & 0x7F) << 3);
|
|
}
|
|
}
|
|
|
|
uint8_t Ppu::Read(uint16_t addr)
|
|
{
|
|
if (_scanline < _vblankStartScanline)
|
|
{
|
|
RenderScanline();
|
|
}
|
|
|
|
switch (addr)
|
|
{
|
|
case 0x2134:
|
|
_state.Ppu1OpenBus = ((int16_t)_state.Mode7.Matrix[0] * ((int16_t)_state.Mode7.Matrix[1] >> 8)) & 0xFF;
|
|
return _state.Ppu1OpenBus;
|
|
|
|
case 0x2135:
|
|
_state.Ppu1OpenBus = (((int16_t)_state.Mode7.Matrix[0] * ((int16_t)_state.Mode7.Matrix[1] >> 8)) >> 8) & 0xFF;
|
|
return _state.Ppu1OpenBus;
|
|
|
|
case 0x2136:
|
|
_state.Ppu1OpenBus = (((int16_t)_state.Mode7.Matrix[0] * ((int16_t)_state.Mode7.Matrix[1] >> 8)) >> 16) & 0xFF;
|
|
return _state.Ppu1OpenBus;
|
|
|
|
case 0x2137:
|
|
//SLHV - Software Latch for H/V Counter
|
|
//Latch values on read, and return open bus
|
|
if (_regs->GetIoPortOutput() & 0x80)
|
|
{
|
|
//Only latch H/V counters if bit 7 of $4201 is set.
|
|
LatchLocationValues();
|
|
}
|
|
break;
|
|
|
|
case 0x2138:
|
|
{
|
|
//OAMDATAREAD - Data for OAM read
|
|
//When trying to read/write during rendering, the internal address used by the PPU's sprite rendering is used
|
|
uint16_t oamAddr = GetOamAddress();
|
|
uint8_t value;
|
|
if (oamAddr < 512)
|
|
{
|
|
value = _oamRam[oamAddr];
|
|
_console->ProcessPpuRead(oamAddr, value, SnesMemoryType::SpriteRam);
|
|
}
|
|
else
|
|
{
|
|
value = _oamRam[0x200 | (oamAddr & 0x1F)];
|
|
_console->ProcessPpuRead(0x200 | (oamAddr & 0x1F), value, SnesMemoryType::SpriteRam);
|
|
}
|
|
|
|
_internalOamAddress = (_internalOamAddress + 1) & 0x3FF;
|
|
_state.Ppu1OpenBus = value;
|
|
return value;
|
|
}
|
|
|
|
case 0x2139:
|
|
{
|
|
//VMDATALREAD - VRAM Data Read low byte
|
|
uint8_t returnValue = (uint8_t)_state.VramReadBuffer;
|
|
_console->ProcessPpuRead(GetVramAddress(), returnValue, SnesMemoryType::VideoRam);
|
|
if (!_state.VramAddrIncrementOnSecondReg)
|
|
{
|
|
UpdateVramReadBuffer();
|
|
_state.VramAddress = (_state.VramAddress + _state.VramIncrementValue) & 0x7FFF;
|
|
}
|
|
_state.Ppu1OpenBus = returnValue;
|
|
return returnValue;
|
|
}
|
|
|
|
case 0x213A:
|
|
{
|
|
//VMDATAHREAD - VRAM Data Read high byte
|
|
uint8_t returnValue = (uint8_t)(_state.VramReadBuffer >> 8);
|
|
_console->ProcessPpuRead(GetVramAddress() + 1, returnValue, SnesMemoryType::VideoRam);
|
|
if (_state.VramAddrIncrementOnSecondReg)
|
|
{
|
|
UpdateVramReadBuffer();
|
|
_state.VramAddress = (_state.VramAddress + _state.VramIncrementValue) & 0x7FFF;
|
|
}
|
|
_state.Ppu1OpenBus = returnValue;
|
|
return returnValue;
|
|
}
|
|
|
|
case 0x213B:
|
|
{
|
|
//CGDATAREAD - CGRAM Data read
|
|
uint8_t value;
|
|
if (_state.CgramAddressLatch)
|
|
{
|
|
value = ((_cgram[_state.CgramAddress] >> 8) & 0x7F) | (_state.Ppu2OpenBus & 0x80);
|
|
_state.CgramAddress++;
|
|
|
|
_console->ProcessPpuRead((_state.CgramAddress >> 1) + 1, value, SnesMemoryType::CGRam);
|
|
}
|
|
else
|
|
{
|
|
value = (uint8_t)_cgram[_state.CgramAddress];
|
|
_console->ProcessPpuRead(_state.CgramAddress >> 1, value, SnesMemoryType::CGRam);
|
|
}
|
|
_state.CgramAddressLatch = !_state.CgramAddressLatch;
|
|
|
|
_state.Ppu2OpenBus = value;
|
|
return value;
|
|
}
|
|
|
|
case 0x213C:
|
|
{
|
|
//OPHCT - Horizontal Scanline Location
|
|
ProcessLocationLatchRequest();
|
|
|
|
uint8_t value;
|
|
if (_horizontalLocToggle)
|
|
{
|
|
//"Note that the value read is only 9 bits: bits 1-7 of the high byte are PPU2 Open Bus."
|
|
value = ((_horizontalLocation & 0x100) >> 8) | (_state.Ppu2OpenBus & 0xFE);
|
|
}
|
|
else
|
|
{
|
|
value = _horizontalLocation & 0xFF;
|
|
}
|
|
_state.Ppu2OpenBus = value;
|
|
_horizontalLocToggle = !_horizontalLocToggle;
|
|
return value;
|
|
}
|
|
|
|
case 0x213D:
|
|
{
|
|
//OPVCT - Vertical Scanline Location
|
|
ProcessLocationLatchRequest();
|
|
|
|
uint8_t value;
|
|
if (_verticalLocationToggle)
|
|
{
|
|
//"Note that the value read is only 9 bits: bits 1-7 of the high byte are PPU2 Open Bus."
|
|
value = ((_verticalLocation & 0x100) >> 8) | (_state.Ppu2OpenBus & 0xFE);
|
|
}
|
|
else
|
|
{
|
|
value = _verticalLocation & 0xFF;
|
|
}
|
|
_state.Ppu2OpenBus = value;
|
|
_verticalLocationToggle = !_verticalLocationToggle;
|
|
return value;
|
|
}
|
|
|
|
case 0x213E:
|
|
{
|
|
//STAT77 - PPU Status Flag and Version
|
|
uint8_t value = (
|
|
(_timeOver ? 0x80 : 0) |
|
|
(_rangeOver ? 0x40 : 0) |
|
|
(_state.Ppu1OpenBus & 0x10) |
|
|
0x01 //PPU (5c77) chip version
|
|
);
|
|
_state.Ppu1OpenBus = value;
|
|
return value;
|
|
}
|
|
|
|
case 0x213F:
|
|
{
|
|
//STAT78 - PPU Status Flag and Version
|
|
ProcessLocationLatchRequest();
|
|
|
|
uint8_t value = (
|
|
(_oddFrame ? 0x80 : 0) |
|
|
(_locationLatched ? 0x40 : 0) |
|
|
(_state.Ppu2OpenBus & 0x20) |
|
|
(_console->GetRegion() == ConsoleRegion::Pal ? 0x10 : 0) |
|
|
0x03 //PPU (5c78) chip version
|
|
);
|
|
|
|
if (_regs->GetIoPortOutput() & 0x80)
|
|
{
|
|
_locationLatched = false;
|
|
|
|
//"The high/low selector is reset to ?elow?f when $213F is read" (the selector is NOT reset when the counter is latched)
|
|
_horizontalLocToggle = false;
|
|
_verticalLocationToggle = false;
|
|
}
|
|
_state.Ppu2OpenBus = value;
|
|
return value;
|
|
}
|
|
|
|
default:
|
|
LogDebug("[Debug] Unimplemented register read: " + HexUtilities::ToHex(addr));
|
|
break;
|
|
}
|
|
|
|
uint16_t reg = addr & 0x210F;
|
|
if ((reg >= 0x2104 && reg <= 0x2106) || (reg >= 0x2108 && reg <= 0x210A))
|
|
{
|
|
//Registers matching $21x4-6 or $21x8-A (where x is 0-2) return the last value read from any of the PPU1 registers $2134-6, $2138-A, or $213E.
|
|
return _state.Ppu1OpenBus;
|
|
}
|
|
return _console->GetMemoryManager()->GetOpenBus();
|
|
}
|
|
|
|
void Ppu::Write(uint32_t addr, uint8_t value)
|
|
{
|
|
if (_scanline < _vblankStartScanline)
|
|
{
|
|
RenderScanline();
|
|
}
|
|
|
|
switch (addr)
|
|
{
|
|
case 0x2100:
|
|
if (_state.ForcedVblank && _scanline == _nmiScanline)
|
|
{
|
|
//"writing this register on the first line of V-Blank (225 or 240, depending on overscan) when force blank is currently active causes the OAM Address Reset to occur."
|
|
UpdateOamAddress();
|
|
}
|
|
|
|
_state.ForcedVblank = (value & 0x80) != 0;
|
|
_state.ScreenBrightness = value & 0x0F;
|
|
break;
|
|
|
|
case 0x2101:
|
|
_state.OamMode = (value & 0xE0) >> 5;
|
|
_state.OamBaseAddress = (value & 0x07) << 13;
|
|
_state.OamAddressOffset = (((value & 0x18) >> 3) + 1) << 12;
|
|
break;
|
|
|
|
case 0x2102:
|
|
_state.OamRamAddress = (_state.OamRamAddress & 0x100) | value;
|
|
UpdateOamAddress();
|
|
break;
|
|
|
|
case 0x2103:
|
|
_state.OamRamAddress = (_state.OamRamAddress & 0xFF) | ((value & 0x01) << 8);
|
|
UpdateOamAddress();
|
|
_state.EnableOamPriority = (value & 0x80) != 0;
|
|
break;
|
|
|
|
case 0x2104:
|
|
{
|
|
//When trying to read/write during rendering, the internal address used by the PPU's sprite rendering is used
|
|
//This is approximated by _oamRenderAddress (but is not cycle accurate) - needed for Uniracers
|
|
uint16_t oamAddr = GetOamAddress();
|
|
|
|
if (oamAddr < 512)
|
|
{
|
|
if (oamAddr & 0x01)
|
|
{
|
|
_console->ProcessPpuWrite(oamAddr - 1, _oamWriteBuffer, SnesMemoryType::SpriteRam);
|
|
_oamRam[oamAddr - 1] = _oamWriteBuffer;
|
|
|
|
_console->ProcessPpuWrite(oamAddr, value, SnesMemoryType::SpriteRam);
|
|
_oamRam[oamAddr] = value;
|
|
}
|
|
else
|
|
{
|
|
_oamWriteBuffer = value;
|
|
}
|
|
}
|
|
|
|
if (!_state.ForcedVblank && _scanline < _nmiScanline)
|
|
{
|
|
//During rendering the high table is also written to when writing to OAM
|
|
oamAddr = 0x200 | ((oamAddr & 0x1F0) >> 4);
|
|
}
|
|
|
|
if (oamAddr >= 512)
|
|
{
|
|
uint16_t address = 0x200 | (oamAddr & 0x1F);
|
|
if ((oamAddr & 0x01) == 0)
|
|
{
|
|
_oamWriteBuffer = value;
|
|
}
|
|
_console->ProcessPpuWrite(address, value, SnesMemoryType::SpriteRam);
|
|
_oamRam[address] = value;
|
|
}
|
|
_internalOamAddress = (_internalOamAddress + 1) & 0x3FF;
|
|
break;
|
|
}
|
|
|
|
case 0x2105:
|
|
if (_state.BgMode != (value & 0x07))
|
|
{
|
|
LogDebug(
|
|
"[Debug] Entering mode: " + std::to_string(value & 0x07) + " (SL: " + std::to_string(_scanline) + ")");
|
|
}
|
|
_state.BgMode = value & 0x07;
|
|
ConvertToHiRes();
|
|
|
|
_state.Mode1Bg3Priority = (value & 0x08) != 0;
|
|
|
|
_state.Layers[0].LargeTiles = (value & 0x10) != 0;
|
|
_state.Layers[1].LargeTiles = (value & 0x20) != 0;
|
|
_state.Layers[2].LargeTiles = (value & 0x40) != 0;
|
|
_state.Layers[3].LargeTiles = (value & 0x80) != 0;
|
|
break;
|
|
|
|
case 0x2106:
|
|
{
|
|
//MOSAIC - Screen Pixelation
|
|
_state.MosaicSize = ((value & 0xF0) >> 4) + 1;
|
|
uint8_t mosaicEnabled = value & 0x0F;
|
|
if (!_state.MosaicEnabled && mosaicEnabled)
|
|
{
|
|
//"If this register is set during the frame, the ?starting scanline is the current scanline, otherwise it is the first visible scanline of the frame."
|
|
//This is only done when mosaic is turned on from an off state (FF6 mosaic effect looks wrong otherwise)
|
|
//FF6's mosaic effect is broken on some screens without this.
|
|
_mosaicScanlineCounter = _state.MosaicSize + 1;
|
|
}
|
|
_state.MosaicEnabled = mosaicEnabled;
|
|
break;
|
|
}
|
|
|
|
case 0x2107:
|
|
case 0x2108:
|
|
case 0x2109:
|
|
case 0x210A:
|
|
//BG 1-4 Tilemap Address and Size (BG1SC, BG2SC, BG3SC, BG4SC)
|
|
_state.Layers[addr - 0x2107].TilemapAddress = (value & 0x7C) << 8;
|
|
_state.Layers[addr - 0x2107].DoubleWidth = (value & 0x01) != 0;
|
|
_state.Layers[addr - 0x2107].DoubleHeight = (value & 0x02) != 0;
|
|
break;
|
|
|
|
case 0x210B:
|
|
case 0x210C:
|
|
//BG1+2 / BG3+4 Chr Address (BG12NBA / BG34NBA)
|
|
_state.Layers[(addr - 0x210B) * 2].ChrAddress = (value & 0x07) << 12;
|
|
_state.Layers[(addr - 0x210B) * 2 + 1].ChrAddress = (value & 0x70) << 8;
|
|
break;
|
|
|
|
case 0x210D:
|
|
//M7HOFS - Mode 7 BG Horizontal Scroll
|
|
//BG1HOFS - BG1 Horizontal Scroll
|
|
_state.Mode7.HScroll = ((value << 8) | (_state.Mode7.ValueLatch)) & 0x1FFF;
|
|
_state.Mode7.ValueLatch = value;
|
|
//no break, keep executing to set the matching BG1 HScroll register, too
|
|
|
|
case 0x210F:
|
|
case 0x2111:
|
|
case 0x2113:
|
|
//BGXHOFS - BG1/2/3/4 Horizontal Scroll
|
|
_state.Layers[(addr - 0x210D) >> 1].HScroll = ((value << 8) | (_hvScrollLatchValue & ~0x07) | (_hScrollLatchValue
|
|
& 0x07)) & 0x3FF;
|
|
_hvScrollLatchValue = value;
|
|
_hScrollLatchValue = value;
|
|
break;
|
|
|
|
case 0x210E:
|
|
//M7VOFS - Mode 7 BG Vertical Scroll
|
|
//BG1VOFS - BG1 Vertical Scroll
|
|
_state.Mode7.VScroll = ((value << 8) | (_state.Mode7.ValueLatch)) & 0x1FFF;
|
|
_state.Mode7.ValueLatch = value;
|
|
//no break, keep executing to set the matching BG1 HScroll register, too
|
|
|
|
case 0x2110:
|
|
case 0x2112:
|
|
case 0x2114:
|
|
//BGXVOFS - BG1/2/3/4 Vertical Scroll
|
|
_state.Layers[(addr - 0x210E) >> 1].VScroll = ((value << 8) | _hvScrollLatchValue) & 0x3FF;
|
|
_hvScrollLatchValue = value;
|
|
break;
|
|
|
|
case 0x2115:
|
|
//VMAIN - Video Port Control
|
|
switch (value & 0x03)
|
|
{
|
|
case 0: _state.VramIncrementValue = 1;
|
|
break;
|
|
case 1: _state.VramIncrementValue = 32;
|
|
break;
|
|
|
|
case 2:
|
|
case 3: _state.VramIncrementValue = 128;
|
|
break;
|
|
}
|
|
|
|
_state.VramAddressRemapping = (value & 0x0C) >> 2;
|
|
_state.VramAddrIncrementOnSecondReg = (value & 0x80) != 0;
|
|
break;
|
|
|
|
case 0x2116:
|
|
//VMADDL - VRAM Address low byte
|
|
_state.VramAddress = (_state.VramAddress & 0x7F00) | value;
|
|
UpdateVramReadBuffer();
|
|
break;
|
|
|
|
case 0x2117:
|
|
//VMADDH - VRAM Address high byte
|
|
_state.VramAddress = (_state.VramAddress & 0x00FF) | ((value & 0x7F) << 8);
|
|
UpdateVramReadBuffer();
|
|
break;
|
|
|
|
case 0x2118:
|
|
//VMDATAL - VRAM Data Write low byte
|
|
if (_scanline >= _nmiScanline || _state.ForcedVblank)
|
|
{
|
|
//Only write the value if in vblank or forced blank (writes to VRAM outside vblank/forced blank are not allowed)
|
|
_console->ProcessPpuWrite(GetVramAddress() << 1, value, SnesMemoryType::VideoRam);
|
|
_vram[GetVramAddress()] = value | (_vram[GetVramAddress()] & 0xFF00);
|
|
}
|
|
|
|
//The VRAM address is incremented even outside of vblank/forced blank
|
|
if (!_state.VramAddrIncrementOnSecondReg)
|
|
{
|
|
_state.VramAddress = (_state.VramAddress + _state.VramIncrementValue) & 0x7FFF;
|
|
}
|
|
break;
|
|
|
|
case 0x2119:
|
|
//VMDATAH - VRAM Data Write high byte
|
|
if (_scanline >= _nmiScanline || _state.ForcedVblank)
|
|
{
|
|
//Only write the value if in vblank or forced blank (writes to VRAM outside vblank/forced blank are not allowed)
|
|
_console->ProcessPpuWrite((GetVramAddress() << 1) + 1, value, SnesMemoryType::VideoRam);
|
|
_vram[GetVramAddress()] = (value << 8) | (_vram[GetVramAddress()] & 0xFF);
|
|
}
|
|
|
|
//The VRAM address is incremented even outside of vblank/forced blank
|
|
if (_state.VramAddrIncrementOnSecondReg)
|
|
{
|
|
_state.VramAddress = (_state.VramAddress + _state.VramIncrementValue) & 0x7FFF;
|
|
}
|
|
break;
|
|
|
|
case 0x211A:
|
|
//M7SEL - Mode 7 Settings
|
|
_state.Mode7.LargeMap = (value & 0x80) != 0;
|
|
_state.Mode7.FillWithTile0 = (value & 0x40) != 0;
|
|
_state.Mode7.HorizontalMirroring = (value & 0x01) != 0;
|
|
_state.Mode7.VerticalMirroring = (value & 0x02) != 0;
|
|
break;
|
|
|
|
case 0x211B:
|
|
case 0x211C:
|
|
case 0x211D:
|
|
case 0x211E:
|
|
//M7A/B/C/D - Mode 7 Matrix A/B/C/D (A/B are also used with $2134/6)
|
|
_state.Mode7.Matrix[addr - 0x211B] = (value << 8) | _state.Mode7.ValueLatch;
|
|
_state.Mode7.ValueLatch = value;
|
|
break;
|
|
|
|
case 0x211F:
|
|
//M7X - Mode 7 Center X
|
|
_state.Mode7.CenterX = ((value << 8) | _state.Mode7.ValueLatch);
|
|
_state.Mode7.ValueLatch = value;
|
|
break;
|
|
|
|
case 0x2120:
|
|
//M7Y - Mode 7 Center Y
|
|
_state.Mode7.CenterY = ((value << 8) | _state.Mode7.ValueLatch);
|
|
_state.Mode7.ValueLatch = value;
|
|
break;
|
|
|
|
case 0x2121:
|
|
//CGRAM Address(CGADD)
|
|
_state.CgramAddress = value;
|
|
_state.CgramAddressLatch = false;
|
|
break;
|
|
|
|
case 0x2122:
|
|
//CGRAM Data write (CGDATA)
|
|
if (_state.CgramAddressLatch)
|
|
{
|
|
//MSB ignores the 7th bit (colors are 15-bit only)
|
|
_console->ProcessPpuWrite(_state.CgramAddress >> 1, _state.CgramWriteBuffer, SnesMemoryType::CGRam);
|
|
_console->ProcessPpuWrite((_state.CgramAddress >> 1) + 1, value & 0x7F, SnesMemoryType::CGRam);
|
|
|
|
_cgram[_state.CgramAddress] = _state.CgramWriteBuffer | ((value & 0x7F) << 8);
|
|
_state.CgramAddress++;
|
|
}
|
|
else
|
|
{
|
|
_state.CgramWriteBuffer = value;
|
|
}
|
|
_state.CgramAddressLatch = !_state.CgramAddressLatch;
|
|
break;
|
|
|
|
case 0x2123:
|
|
//W12SEL - Window Mask Settings for BG1 and BG2
|
|
ProcessWindowMaskSettings(value, 0);
|
|
break;
|
|
|
|
case 0x2124:
|
|
//W34SEL - Window Mask Settings for BG3 and BG4
|
|
ProcessWindowMaskSettings(value, 2);
|
|
break;
|
|
|
|
case 0x2125:
|
|
//WOBJSEL - Window Mask Settings for OBJ and Color Window
|
|
ProcessWindowMaskSettings(value, 4);
|
|
break;
|
|
|
|
case 0x2126:
|
|
//WH0 - Window 1 Left Position
|
|
_state.Window[0].Left = value;
|
|
break;
|
|
|
|
case 0x2127:
|
|
//WH1 - Window 1 Right Position
|
|
_state.Window[0].Right = value;
|
|
break;
|
|
|
|
case 0x2128:
|
|
//WH2 - Window 2 Left Position
|
|
_state.Window[1].Left = value;
|
|
break;
|
|
|
|
case 0x2129:
|
|
//WH3 - Window 2 Right Position
|
|
_state.Window[1].Right = value;
|
|
break;
|
|
|
|
case 0x212A:
|
|
//WBGLOG - Window mask logic for BG
|
|
_state.MaskLogic[0] = (WindowMaskLogic)(value & 0x03);
|
|
_state.MaskLogic[1] = (WindowMaskLogic)((value >> 2) & 0x03);
|
|
_state.MaskLogic[2] = (WindowMaskLogic)((value >> 4) & 0x03);
|
|
_state.MaskLogic[3] = (WindowMaskLogic)((value >> 6) & 0x03);
|
|
break;
|
|
|
|
case 0x212B:
|
|
//WOBJLOG - Window mask logic for OBJs and Color Window
|
|
_state.MaskLogic[4] = (WindowMaskLogic)((value >> 0) & 0x03);
|
|
_state.MaskLogic[5] = (WindowMaskLogic)((value >> 2) & 0x03);
|
|
break;
|
|
|
|
case 0x212C:
|
|
//TM - Main Screen Designation
|
|
_state.MainScreenLayers = value & 0x1F;
|
|
break;
|
|
|
|
case 0x212D:
|
|
//TS - Subscreen Designation
|
|
_state.SubScreenLayers = value & 0x1F;
|
|
break;
|
|
|
|
case 0x212E:
|
|
//TMW - Window Mask Designation for the Main Screen
|
|
for (int i = 0; i < 5; i++)
|
|
{
|
|
_state.WindowMaskMain[i] = ((value >> i) & 0x01) != 0;
|
|
}
|
|
break;
|
|
|
|
case 0x212F:
|
|
//TSW - Window Mask Designation for the Subscreen
|
|
for (int i = 0; i < 5; i++)
|
|
{
|
|
_state.WindowMaskSub[i] = ((value >> i) & 0x01) != 0;
|
|
}
|
|
break;
|
|
|
|
case 0x2130:
|
|
//CGWSEL - Color Addition Select
|
|
_state.ColorMathClipMode = (ColorWindowMode)((value >> 6) & 0x03);
|
|
_state.ColorMathPreventMode = (ColorWindowMode)((value >> 4) & 0x03);
|
|
_state.ColorMathAddSubscreen = (value & 0x02) != 0;
|
|
_state.DirectColorMode = (value & 0x01) != 0;
|
|
break;
|
|
|
|
case 0x2131:
|
|
//CGADSUB - Color math designation
|
|
_state.ColorMathEnabled = value & 0x3F;
|
|
_state.ColorMathSubstractMode = (value & 0x80) != 0;
|
|
_state.ColorMathHalveResult = (value & 0x40) != 0;
|
|
break;
|
|
|
|
case 0x2132:
|
|
//COLDATA - Fixed Color Data
|
|
if (value & 0x80)
|
|
{
|
|
//B
|
|
_state.FixedColor = (_state.FixedColor & ~0x7C00) | ((value & 0x1F) << 10);
|
|
}
|
|
if (value & 0x40)
|
|
{
|
|
//G
|
|
_state.FixedColor = (_state.FixedColor & ~0x3E0) | ((value & 0x1F) << 5);
|
|
}
|
|
if (value & 0x20)
|
|
{
|
|
//R
|
|
_state.FixedColor = (_state.FixedColor & ~0x1F) | (value & 0x1F);
|
|
}
|
|
break;
|
|
|
|
case 0x2133:
|
|
{
|
|
//SETINI - Screen Mode/Video Select
|
|
//_externalSync = (value & 0x80) != 0; //NOT USED
|
|
_state.ExtBgEnabled = (value & 0x40) != 0;
|
|
_state.HiResMode = (value & 0x08) != 0;
|
|
_state.OverscanMode = (value & 0x04) != 0;
|
|
_state.ObjInterlace = (value & 0x02) != 0;
|
|
|
|
bool interlace = (value & 0x01) != 0;
|
|
if (_state.ScreenInterlace != interlace)
|
|
{
|
|
_state.ScreenInterlace = interlace;
|
|
if (_scanline >= _vblankStartScanline && interlace)
|
|
{
|
|
//Clear buffer when turning on interlace mode during vblank
|
|
memset(GetPreviousScreenBuffer(), 0, 512 * 478 * sizeof(uint16_t));
|
|
}
|
|
}
|
|
ConvertToHiRes();
|
|
break;
|
|
}
|
|
|
|
default:
|
|
LogDebug(
|
|
"[Debug] Unimplemented register write: " + HexUtilities::ToHex(addr) + " = " + HexUtilities::ToHex(value));
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Ppu::Serialize(Serializer& s)
|
|
{
|
|
uint16_t unused_oamRenderAddress = 0;
|
|
s.Stream(
|
|
_state.ForcedVblank, _state.ScreenBrightness, _scanline, _frameCount, _drawStartX, _drawEndX, _state.BgMode,
|
|
_state.Mode1Bg3Priority, _state.MainScreenLayers, _state.SubScreenLayers, _state.VramAddress,
|
|
_state.VramIncrementValue, _state.VramAddressRemapping,
|
|
_state.VramAddrIncrementOnSecondReg, _state.VramReadBuffer, _state.Ppu1OpenBus, _state.Ppu2OpenBus,
|
|
_state.CgramAddress, _state.MosaicSize, _state.MosaicEnabled,
|
|
_mosaicScanlineCounter, _state.OamMode, _state.OamBaseAddress, _state.OamAddressOffset, _state.OamRamAddress,
|
|
_state.EnableOamPriority,
|
|
_internalOamAddress, _oamWriteBuffer, _timeOver, _rangeOver, _state.HiResMode, _state.ScreenInterlace,
|
|
_state.ObjInterlace,
|
|
_state.OverscanMode, _state.DirectColorMode, _state.ColorMathClipMode, _state.ColorMathPreventMode,
|
|
_state.ColorMathAddSubscreen, _state.ColorMathEnabled,
|
|
_state.ColorMathSubstractMode, _state.ColorMathHalveResult, _state.FixedColor, _hvScrollLatchValue,
|
|
_hScrollLatchValue,
|
|
_horizontalLocation, _horizontalLocToggle, _verticalLocation, _verticalLocationToggle, _locationLatched,
|
|
_state.MaskLogic[0], _state.MaskLogic[1], _state.MaskLogic[2], _state.MaskLogic[3], _state.MaskLogic[4],
|
|
_state.MaskLogic[5],
|
|
_state.WindowMaskMain[0], _state.WindowMaskMain[1], _state.WindowMaskMain[2], _state.WindowMaskMain[3],
|
|
_state.WindowMaskMain[4],
|
|
_state.WindowMaskSub[0], _state.WindowMaskSub[1], _state.WindowMaskSub[2], _state.WindowMaskSub[3],
|
|
_state.WindowMaskSub[4],
|
|
_state.Mode7.CenterX, _state.Mode7.CenterY, _state.ExtBgEnabled, _state.Mode7.FillWithTile0,
|
|
_state.Mode7.HorizontalMirroring,
|
|
_state.Mode7.HScroll, _state.Mode7.LargeMap, _state.Mode7.Matrix[0], _state.Mode7.Matrix[1],
|
|
_state.Mode7.Matrix[2], _state.Mode7.Matrix[3],
|
|
_state.Mode7.ValueLatch, _state.Mode7.VerticalMirroring, _state.Mode7.VScroll, unused_oamRenderAddress, _oddFrame,
|
|
_vblankStartScanline,
|
|
_state.CgramAddressLatch, _state.CgramWriteBuffer, _nmiScanline, _vblankEndScanline, _adjustedVblankEndScanline,
|
|
_baseVblankEndScanline,
|
|
_overclockEnabled
|
|
);
|
|
|
|
for (int i = 0; i < 4; i++)
|
|
{
|
|
s.Stream(
|
|
_state.Layers[i].ChrAddress, _state.Layers[i].DoubleHeight, _state.Layers[i].DoubleWidth,
|
|
_state.Layers[i].HScroll,
|
|
_state.Layers[i].LargeTiles, _state.Layers[i].TilemapAddress, _state.Layers[i].VScroll
|
|
);
|
|
}
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
s.Stream(
|
|
_state.Window[i].ActiveLayers[0], _state.Window[i].ActiveLayers[1], _state.Window[i].ActiveLayers[2],
|
|
_state.Window[i].ActiveLayers[3], _state.Window[i].ActiveLayers[4], _state.Window[i].ActiveLayers[5],
|
|
_state.Window[i].InvertedLayers[0], _state.Window[i].InvertedLayers[1], _state.Window[i].InvertedLayers[2],
|
|
_state.Window[i].InvertedLayers[3], _state.Window[i].InvertedLayers[4], _state.Window[i].InvertedLayers[5],
|
|
_state.Window[i].Left, _state.Window[i].Right
|
|
);
|
|
}
|
|
|
|
s.StreamArray(_vram, Ppu::VideoRamSize >> 1);
|
|
s.StreamArray(_oamRam, Ppu::SpriteRamSize);
|
|
s.StreamArray(_cgram, Ppu::CgRamSize >> 1);
|
|
|
|
for (int i = 0; i < 4; i++)
|
|
{
|
|
for (int j = 0; j < 33; j++)
|
|
{
|
|
s.Stream(
|
|
_layerData[i].Tiles[j].ChrData[0], _layerData[i].Tiles[j].ChrData[1], _layerData[i].Tiles[j].ChrData[2],
|
|
_layerData[i].Tiles[j].ChrData[3],
|
|
_layerData[i].Tiles[j].TilemapData, _layerData[i].Tiles[j].VScroll
|
|
);
|
|
}
|
|
}
|
|
s.Stream(_hOffset, _vOffset, _fetchBgStart, _fetchBgEnd, _fetchSpriteStart, _fetchSpriteEnd);
|
|
}
|
|
|
|
void Ppu::RandomizeState()
|
|
{
|
|
_state.ScreenBrightness = _settings->GetRandomValue(0x0F);
|
|
_state.Mode7.CenterX = _settings->GetRandomValue(0xFFFF);
|
|
_state.Mode7.CenterY = _settings->GetRandomValue(0xFFFF);
|
|
_state.Mode7.FillWithTile0 = _settings->GetRandomBool();
|
|
_state.Mode7.HorizontalMirroring = _settings->GetRandomBool();
|
|
_state.Mode7.HScroll = _settings->GetRandomValue(0x1FFF);
|
|
_state.Mode7.HScrollLatch = _settings->GetRandomValue(0x1FFF);
|
|
_state.Mode7.LargeMap = _settings->GetRandomBool();
|
|
_state.Mode7.Matrix[0] = _settings->GetRandomValue(0xFFFF);
|
|
_state.Mode7.Matrix[1] = _settings->GetRandomValue(0xFFFF);
|
|
_state.Mode7.Matrix[2] = _settings->GetRandomValue(0xFFFF);
|
|
_state.Mode7.Matrix[3] = _settings->GetRandomValue(0xFFFF);
|
|
_state.Mode7.ValueLatch = _settings->GetRandomValue(0xFF);
|
|
_state.Mode7.VerticalMirroring = _settings->GetRandomBool();
|
|
_state.Mode7.VScroll = _settings->GetRandomValue(0x1FFF);
|
|
_state.Mode7.VScrollLatch = _settings->GetRandomValue(0x1FFF);
|
|
|
|
_state.BgMode = _settings->GetRandomValue(7);
|
|
_state.Mode1Bg3Priority = _settings->GetRandomBool();
|
|
_state.MainScreenLayers = _settings->GetRandomValue(0x1F);
|
|
_state.SubScreenLayers = _settings->GetRandomValue(0x1F);
|
|
|
|
for (int i = 0; i < 4; i++)
|
|
{
|
|
_state.Layers[i].TilemapAddress = _settings->GetRandomValue(0x1F) << 10;
|
|
_state.Layers[i].ChrAddress = _settings->GetRandomValue(0x07) << 12;
|
|
_state.Layers[i].HScroll = _settings->GetRandomValue(0x1FFF);
|
|
_state.Layers[i].VScroll = _settings->GetRandomValue(0x1FFF);
|
|
_state.Layers[i].DoubleWidth = _settings->GetRandomBool();
|
|
_state.Layers[i].DoubleHeight = _settings->GetRandomBool();
|
|
_state.Layers[i].LargeTiles = _settings->GetRandomBool();
|
|
}
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
_state.Window[i].Left = _settings->GetRandomValue(0xFF);
|
|
_state.Window[i].Right = _settings->GetRandomValue(0xFF);
|
|
for (int j = 0; j < 6; j++)
|
|
{
|
|
_state.Window[i].ActiveLayers[j] = _settings->GetRandomBool();
|
|
_state.Window[i].InvertedLayers[j] = _settings->GetRandomBool();
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < 6; i++)
|
|
{
|
|
_state.MaskLogic[i] = (WindowMaskLogic)_settings->GetRandomValue(3);
|
|
}
|
|
|
|
for (int i = 0; i < 5; i++)
|
|
{
|
|
_state.WindowMaskMain[i] = _settings->GetRandomBool();
|
|
_state.WindowMaskSub[i] = _settings->GetRandomBool();
|
|
}
|
|
|
|
_state.VramAddress = _settings->GetRandomValue(0x7FFF);
|
|
switch (_settings->GetRandomValue(0x03))
|
|
{
|
|
case 0: _state.VramIncrementValue = 1;
|
|
break;
|
|
case 1: _state.VramIncrementValue = 32;
|
|
break;
|
|
case 2:
|
|
case 3: _state.VramIncrementValue = 128;
|
|
break;
|
|
}
|
|
|
|
_state.VramAddressRemapping = _settings->GetRandomValue(0x03);
|
|
_state.VramAddrIncrementOnSecondReg = _settings->GetRandomBool();
|
|
_state.VramReadBuffer = _settings->GetRandomValue(0xFFFF);
|
|
|
|
_state.Ppu1OpenBus = _settings->GetRandomValue(0xFF);
|
|
_state.Ppu2OpenBus = _settings->GetRandomValue(0xFF);
|
|
|
|
_state.CgramAddress = _settings->GetRandomValue(0xFF);
|
|
_state.CgramWriteBuffer = _settings->GetRandomValue(0xFF);
|
|
_state.CgramAddressLatch = _settings->GetRandomBool();
|
|
|
|
_state.MosaicSize = _settings->GetRandomValue(0x0F) + 1;
|
|
_state.MosaicEnabled = _settings->GetRandomValue(0x0F);
|
|
|
|
_state.OamRamAddress = _settings->GetRandomValue(0x1FF);
|
|
_state.OamMode = _settings->GetRandomValue(0x07);
|
|
_state.OamBaseAddress = _settings->GetRandomValue(0x07) << 13;
|
|
_state.OamAddressOffset = (_settings->GetRandomValue(0x03) + 1) << 12;
|
|
_state.EnableOamPriority = _settings->GetRandomBool();
|
|
|
|
_state.ExtBgEnabled = _settings->GetRandomBool();
|
|
_state.HiResMode = _settings->GetRandomBool();
|
|
_state.ScreenInterlace = _settings->GetRandomBool();
|
|
_state.ObjInterlace = _settings->GetRandomBool();
|
|
_state.OverscanMode = _settings->GetRandomBool();
|
|
_state.DirectColorMode = _settings->GetRandomBool();
|
|
|
|
_state.ColorMathClipMode = (ColorWindowMode)_settings->GetRandomValue(3);
|
|
_state.ColorMathPreventMode = (ColorWindowMode)_settings->GetRandomValue(3);
|
|
_state.ColorMathAddSubscreen = _settings->GetRandomBool();
|
|
_state.ColorMathEnabled = _settings->GetRandomValue(0x3F);
|
|
_state.ColorMathSubstractMode = _settings->GetRandomBool();
|
|
_state.ColorMathHalveResult = _settings->GetRandomBool();
|
|
_state.FixedColor = _settings->GetRandomValue(0x7FFF);
|
|
}
|
|
|
|
/* Everything below this point is used to select the proper arguments for templates */
|
|
template <uint8_t layerIndex, uint8_t bpp, uint8_t normalPriority, uint8_t highPriority, uint16_t basePaletteOffset,
|
|
bool hiResMode, bool applyMosaic>
|
|
void Ppu::RenderTilemap()
|
|
{
|
|
if (_state.DirectColorMode)
|
|
{
|
|
RenderTilemap<layerIndex, bpp, normalPriority, highPriority, basePaletteOffset, hiResMode, applyMosaic, true>();
|
|
}
|
|
else
|
|
{
|
|
RenderTilemap<layerIndex, bpp, normalPriority, highPriority, basePaletteOffset, hiResMode, applyMosaic, false>();
|
|
}
|
|
}
|
|
|
|
template <uint8_t layerIndex, uint8_t bpp, uint8_t normalPriority, uint8_t highPriority, uint16_t basePaletteOffset,
|
|
bool hiResMode>
|
|
void Ppu::RenderTilemap()
|
|
{
|
|
bool applyMosaic = ((_state.MosaicEnabled >> layerIndex) & 0x01) != 0 && (_state.MosaicSize > 1 || _state.BgMode == 5
|
|
|| _state.BgMode == 6);
|
|
|
|
if (applyMosaic)
|
|
{
|
|
RenderTilemap<layerIndex, bpp, normalPriority, highPriority, basePaletteOffset, hiResMode, true>();
|
|
}
|
|
else
|
|
{
|
|
RenderTilemap<layerIndex, bpp, normalPriority, highPriority, basePaletteOffset, hiResMode, false>();
|
|
}
|
|
}
|
|
|
|
template <uint8_t layerIndex, uint8_t bpp, uint8_t normalPriority, uint8_t highPriority, uint16_t basePaletteOffset>
|
|
void Ppu::RenderTilemap()
|
|
{
|
|
if (!IsRenderRequired(layerIndex))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (_state.BgMode == 5 || _state.BgMode == 6)
|
|
{
|
|
RenderTilemap<layerIndex, bpp, normalPriority, highPriority, basePaletteOffset, true>();
|
|
}
|
|
else
|
|
{
|
|
RenderTilemap<layerIndex, bpp, normalPriority, highPriority, basePaletteOffset, false>();
|
|
}
|
|
}
|
|
|
|
template <uint8_t layerIndex, uint8_t normalPriority, uint8_t highPriority>
|
|
void Ppu::RenderTilemapMode7()
|
|
{
|
|
if (!IsRenderRequired(layerIndex))
|
|
{
|
|
return;
|
|
}
|
|
|
|
bool applyMosaic = ((_state.MosaicEnabled >> layerIndex) & 0x01) != 0;
|
|
|
|
if (applyMosaic)
|
|
{
|
|
RenderTilemapMode7<layerIndex, normalPriority, highPriority, true>();
|
|
}
|
|
else
|
|
{
|
|
RenderTilemapMode7<layerIndex, normalPriority, highPriority, false>();
|
|
}
|
|
}
|
|
|
|
template <uint8_t layerIndex, uint8_t normalPriority, uint8_t highPriority, bool applyMosaic>
|
|
void Ppu::RenderTilemapMode7()
|
|
{
|
|
if (_state.DirectColorMode)
|
|
{
|
|
RenderTilemapMode7<layerIndex, normalPriority, highPriority, applyMosaic, true>();
|
|
}
|
|
else
|
|
{
|
|
RenderTilemapMode7<layerIndex, normalPriority, highPriority, applyMosaic, false>();
|
|
}
|
|
}
|