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/*
Copyright 2016-2020 Arisotura
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"
class GPU2D
{
public:
GPU2D(u32 num);
virtual ~GPU2D() {}
void Reset();
void DoSavestate(Savestate* file);
void SetEnabled(bool enable) { Enabled = enable; }
void SetFramebuffer(u32* buf);
virtual void SetRenderSettings(bool accel) = 0;
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()
{
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);
virtual void DrawScanline(u32 line) = 0;
virtual void DrawSprites(u32 line) = 0;
void VBlank();
virtual void VBlankEnd();
void CheckWindows(u32 line);
u16* GetBGExtPal(u32 slot, u32 pal);
u16* GetOBJExtPal();
void GetBGVRAM(u8*& data, u32& mask);
void GetOBJVRAM(u8*& data, u32& mask);
protected:
u32 Num;
bool Enabled;
u32* Framebuffer;
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;
u8 WindowMask[256] __attribute__((aligned (8)));
u8 OBJWindow[256] __attribute__((aligned (8)));
void UpdateMosaicCounters(u32 line);
void CalculateWindowMask(u32 line);
virtual void MosaicXSizeChanged() = 0;
};
class GPU2D_Soft : public GPU2D
{
public:
GPU2D_Soft(u32 num);
~GPU2D_Soft() override {}
void SetRenderSettings(bool accel) override;
void DrawScanline(u32 line) override;
void DrawSprites(u32 line) override;
void VBlankEnd() override;
protected:
void MosaicXSizeChanged() override;
private:
bool Accelerated;
u32 BGOBJLine[256*3] __attribute__((aligned (8)));
u32* _3DLine;
u32 OBJLine[256] __attribute__((aligned (8)));
u8 OBJIndex[256] __attribute__((aligned (8)));
u32 NumSprites;
u8 MosaicTable[16][256];
u8* CurBGXMosaicTable;
u8* CurOBJXMosaicTable;
u32 ColorBlend4(u32 val1, u32 val2, u32 eva, u32 evb);
u32 ColorBlend5(u32 val1, u32 val2);
u32 ColorBrightnessUp(u32 val, u32 factor);
u32 ColorBrightnessDown(u32 val, u32 factor);
u32 ColorComposite(int i, u32 val1, u32 val2);
template<u32 bgmode> void DrawScanlineBGMode(u32 line);
void DrawScanlineBGMode6(u32 line);
void DrawScanlineBGMode7(u32 line);
void DrawScanline_BGOBJ(u32 line);
static void DrawPixel_Normal(u32* dst, u16 color, u32 flag);
static void DrawPixel_Accel(u32* dst, u16 color, u32 flag);
typedef void (*DrawPixel)(u32* dst, u16 color, u32 flag);
void DrawBG_3D();
template<bool mosaic, DrawPixel drawPixel> void DrawBG_Text(u32 line, u32 bgnum);
template<bool mosaic, DrawPixel drawPixel> void DrawBG_Affine(u32 line, u32 bgnum);
template<bool mosaic, DrawPixel drawPixel> void DrawBG_Extended(u32 line, u32 bgnum);
template<bool mosaic, DrawPixel drawPixel> void DrawBG_Large(u32 line);
void ApplySpriteMosaicX();
template<DrawPixel drawPixel>
void InterleaveSprites(u32 prio);
template<bool window> void DrawSprite_Rotscale(u32 num, u32 boundwidth, u32 boundheight, u32 width, u32 height, s32 xpos, s32 ypos);
template<bool window> void DrawSprite_Normal(u32 num, u32 width, u32 height, s32 xpos, s32 ypos);
void DoCapture(u32 line, u32 width);
};
#endif
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