mirror of
https://github.com/libretro/Mesen.git
synced 2024-12-14 21:08:44 +00:00
fbecf90a54
+Fixed vertical sync causing high cpu usage. +Reduced memory usage by removing useless buffers (Renderer)
95 lines
3.8 KiB
C++
95 lines
3.8 KiB
C++
#pragma once
|
|
#include "stdafx.h"
|
|
#include "PPU.h"
|
|
#include "HdNesPack.h"
|
|
#include "VideoDecoder.h"
|
|
|
|
class HdPpu : public PPU
|
|
{
|
|
private:
|
|
HdPpuPixelInfo* _screenTileBuffers[2];
|
|
HdPpuPixelInfo* _screenTiles;
|
|
|
|
protected:
|
|
void DrawPixel()
|
|
{
|
|
uint16_t bufferOffset = (_scanline << 8) + _cycle - 1;
|
|
uint16_t &pixel = _currentOutputBuffer[bufferOffset];
|
|
_lastSprite = nullptr;
|
|
|
|
if(IsRenderingEnabled() || ((_state.VideoRamAddr & 0x3F00) != 0x3F00)) {
|
|
uint32_t paletteOffset;
|
|
uint32_t color = GetPixelColor(paletteOffset);
|
|
if(color == 0) {
|
|
pixel = ReadPaletteRAM(0) | _intensifyColorBits;
|
|
} else {
|
|
pixel = ReadPaletteRAM(paletteOffset + color) | _intensifyColorBits;
|
|
}
|
|
|
|
HdPpuPixelInfo &tileInfo = _screenTiles[bufferOffset];
|
|
if(_lastSprite) {
|
|
tileInfo.Sprite.TileIndex = _memoryManager->ToAbsoluteChrAddress(_lastSprite->TileAddr) / 16;
|
|
tileInfo.Sprite.PaletteColors = ReadPaletteRAM(_lastSprite->PaletteOffset + 1) | (ReadPaletteRAM(_lastSprite->PaletteOffset + 2) << 8) | (ReadPaletteRAM(_lastSprite->PaletteOffset + 3) << 16);
|
|
tileInfo.Sprite.OffsetY = _lastSprite->OffsetY;
|
|
|
|
tileInfo.Sprite.OffsetX = _cycle - _lastSprite->SpriteX - 1;
|
|
tileInfo.Sprite.HorizontalMirroring = _lastSprite->HorizontalMirror;
|
|
tileInfo.Sprite.VerticalMirroring = _lastSprite->VerticalMirror;
|
|
tileInfo.Sprite.BackgroundPriority = _lastSprite->BackgroundPriority;
|
|
|
|
uint32_t backgroundColor = 0;
|
|
if((_cycle > 8 || _flags.BackgroundMask) && _flags.BackgroundEnabled) {
|
|
//BackgroundMask = false: Hide background in leftmost 8 pixels of screen
|
|
backgroundColor = (((_state.LowBitShift << _state.XScroll) & 0x8000) >> 15) | (((_state.HighBitShift << _state.XScroll) & 0x8000) >> 14);
|
|
}
|
|
|
|
paletteOffset = ((_state.XScroll + ((_cycle - 1) & 0x07) < 8) ? _previousTile.PaletteOffset : _currentTile.PaletteOffset);
|
|
tileInfo.Sprite.BgColorIndex = backgroundColor;
|
|
if(backgroundColor == 0) {
|
|
tileInfo.Sprite.BgColor = ReadPaletteRAM(0);
|
|
} else {
|
|
tileInfo.Sprite.BgColor = ReadPaletteRAM(paletteOffset + backgroundColor);
|
|
}
|
|
} else {
|
|
tileInfo.Sprite.TileIndex = HdPpuTileInfo::NoTile;
|
|
}
|
|
TileInfo* lastTile = &((_state.XScroll + ((_cycle - 1) & 0x07) < 8) ? _previousTile : _currentTile);
|
|
tileInfo.Tile.TileIndex = _memoryManager->ToAbsoluteChrAddress(lastTile->TileAddr) / 16;
|
|
tileInfo.Tile.PaletteColors = ReadPaletteRAM(lastTile->PaletteOffset + 1) | (ReadPaletteRAM(lastTile->PaletteOffset + 2) << 8) | (ReadPaletteRAM(lastTile->PaletteOffset + 3) << 16);
|
|
tileInfo.Tile.OffsetY = lastTile->OffsetY;
|
|
tileInfo.Tile.BackgroundPriority = false;
|
|
|
|
tileInfo.Tile.OffsetX = (_state.XScroll + ((_cycle - 1) & 0x07)) & 0x07;
|
|
tileInfo.Tile.HorizontalMirroring = false;
|
|
tileInfo.Tile.VerticalMirroring = false;
|
|
tileInfo.Tile.BgColor = ReadPaletteRAM(0);
|
|
} else {
|
|
//"If the current VRAM address points in the range $3F00-$3FFF during forced blanking, the color indicated by this palette location will be shown on screen instead of the backdrop color."
|
|
pixel = ReadPaletteRAM(_state.VideoRamAddr) | _intensifyColorBits;
|
|
_screenTiles[bufferOffset].Tile.TileIndex = HdPpuTileInfo::NoTile;
|
|
_screenTiles[bufferOffset].Sprite.TileIndex = HdPpuTileInfo::NoTile;
|
|
}
|
|
}
|
|
|
|
public:
|
|
HdPpu(MemoryManager* memoryManager) : PPU(memoryManager)
|
|
{
|
|
_screenTileBuffers[0] = new HdPpuPixelInfo[256 * 240];
|
|
_screenTileBuffers[1] = new HdPpuPixelInfo[256 * 240];
|
|
_screenTiles = _screenTileBuffers[0];
|
|
}
|
|
|
|
~HdPpu()
|
|
{
|
|
delete[] _screenTileBuffers[0];
|
|
delete[] _screenTileBuffers[1];
|
|
}
|
|
|
|
void SendFrame()
|
|
{
|
|
VideoDecoder::GetInstance()->UpdateFrame(_currentOutputBuffer, _screenTiles);
|
|
|
|
_currentOutputBuffer = (_currentOutputBuffer == _outputBuffers[0]) ? _outputBuffers[1] : _outputBuffers[0];
|
|
_screenTiles = (_screenTiles == _screenTileBuffers[0]) ? _screenTileBuffers[1] : _screenTileBuffers[0];
|
|
}
|
|
}; |