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/*
Copyright 2016-2023 melonDS team
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#ifndef GPU2D_H
#define GPU2D_H
#include "types.h"
#include "Savestate.h"
namespace melonDS
{
class GPU;
namespace GPU2D
{
class Unit
{
public:
// take a reference to the GPU so we can access its state
// and ensure that it's not null
Unit(u32 num, melonDS::GPU& gpu);
virtual ~Unit() = default;
Unit(const Unit&) = delete;
Unit& operator=(const Unit&) = delete;
void Reset();
void DoSavestate(Savestate* file);
void SetEnabled(bool enable) { Enabled = enable; }
u8 Read8(u32 addr);
u16 Read16(u32 addr);
u32 Read32(u32 addr);
void Write8(u32 addr, u8 val);
void Write16(u32 addr, u16 val);
void Write32(u32 addr, u32 val);
bool UsesFIFO() const
{
if (((DispCnt >> 16) & 0x3) == 3)
return true;
if ((CaptureCnt & (1<<25)) && ((CaptureCnt >> 29) & 0x3) != 0)
return true;
return false;
}
void SampleFIFO(u32 offset, u32 num);
void VBlank();
virtual void VBlankEnd();
void CheckWindows(u32 line);
u16* GetBGExtPal(u32 slot, u32 pal);
u16* GetOBJExtPal();
void GetBGVRAM(u8*& data, u32& mask) const;
void GetOBJVRAM(u8*& data, u32& mask) const;
void UpdateMosaicCounters(u32 line);
void CalculateWindowMask(u32 line, u8* windowMask, const u8* objWindow);
u32 Num;
bool Enabled;
u16 DispFIFO[16];
u32 DispFIFOReadPtr;
u32 DispFIFOWritePtr;
u16 DispFIFOBuffer[256];
u32 DispCnt;
u16 BGCnt[4];
u16 BGXPos[4];
u16 BGYPos[4];
s32 BGXRef[2];
s32 BGYRef[2];
s32 BGXRefInternal[2];
s32 BGYRefInternal[2];
s16 BGRotA[2];
s16 BGRotB[2];
s16 BGRotC[2];
s16 BGRotD[2];
u8 Win0Coords[4];
u8 Win1Coords[4];
u8 WinCnt[4];
u32 Win0Active;
u32 Win1Active;
u8 BGMosaicSize[2];
u8 OBJMosaicSize[2];
u8 BGMosaicY, BGMosaicYMax;
u8 OBJMosaicYCount, OBJMosaicY, OBJMosaicYMax;
u16 BlendCnt;
u16 BlendAlpha;
u8 EVA, EVB;
u8 EVY;
bool CaptureLatch;
u32 CaptureCnt;
u16 MasterBrightness;
private:
melonDS::GPU& GPU;
};
class Renderer2D
{
public:
virtual ~Renderer2D() {}
virtual void DrawScanline(u32 line, Unit* unit) = 0;
virtual void DrawSprites(u32 line, Unit* unit) = 0;
virtual void VBlankEnd(Unit* unitA, Unit* unitB) = 0;
void SetFramebuffer(u32* unitA, u32* unitB)
{
Framebuffer[0] = unitA;
Framebuffer[1] = unitB;
}
protected:
u32* Framebuffer[2];
Unit* CurUnit;
};
}
}
#endif
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