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