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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/.
*/
#pragma once
#include "GPU2D.h"
namespace melonDS
{
class GPU;
namespace GPU2D
{
class SoftRenderer : public Renderer2D
{
public:
SoftRenderer(melonDS::GPU& gpu);
~SoftRenderer() override {}
void DrawScanline(u32 line, Unit* unit) override;
void DrawSprites(u32 line, Unit* unit) override;
void VBlankEnd(Unit* unitA, Unit* unitB) override;
private:
melonDS::GPU& GPU;
alignas(8) u32 BGOBJLine[256*3];
u32* _3DLine;
alignas(8) u8 WindowMask[256];
alignas(8) u32 OBJLine[2][256];
alignas(8) u8 OBJWindow[2][256];
u32 NumSprites[2];
u8* CurBGXMosaicTable;
array2d<u8, 16, 256> MosaicTable = []() constexpr
{
array2d<u8, 16, 256> table {};
// initialize mosaic table
for (int m = 0; m < 16; m++)
{
for (int x = 0; x < 256; x++)
{
int offset = x % (m+1);
table[m][x] = offset;
}
}
return table;
}();
static constexpr u32 ColorBlend4(u32 val1, u32 val2, u32 eva, u32 evb) noexcept
{
u32 r = (((val1 & 0x00003F) * eva) + ((val2 & 0x00003F) * evb) + 0x000008) >> 4;
u32 g = ((((val1 & 0x003F00) * eva) + ((val2 & 0x003F00) * evb) + 0x000800) >> 4) & 0x007F00;
u32 b = ((((val1 & 0x3F0000) * eva) + ((val2 & 0x3F0000) * evb) + 0x080000) >> 4) & 0x7F0000;
if (r > 0x00003F) r = 0x00003F;
if (g > 0x003F00) g = 0x003F00;
if (b > 0x3F0000) b = 0x3F0000;
return r | g | b | 0xFF000000;
}
static constexpr u32 ColorBlend5(u32 val1, u32 val2) noexcept
{
u32 eva = ((val1 >> 24) & 0x1F) + 1;
u32 evb = 32 - eva;
if (eva == 32) return val1;
u32 r = (((val1 & 0x00003F) * eva) + ((val2 & 0x00003F) * evb) + 0x000010) >> 5;
u32 g = ((((val1 & 0x003F00) * eva) + ((val2 & 0x003F00) * evb) + 0x001000) >> 5) & 0x007F00;
u32 b = ((((val1 & 0x3F0000) * eva) + ((val2 & 0x3F0000) * evb) + 0x100000) >> 5) & 0x7F0000;
if (r > 0x00003F) r = 0x00003F;
if (g > 0x003F00) g = 0x003F00;
if (b > 0x3F0000) b = 0x3F0000;
return r | g | b | 0xFF000000;
}
static constexpr u32 ColorBrightnessUp(u32 val, u32 factor, u32 bias) noexcept
{
u32 rb = val & 0x3F003F;
u32 g = val & 0x003F00;
rb += (((((0x3F003F - rb) * factor) + (bias*0x010001)) >> 4) & 0x3F003F);
g += (((((0x003F00 - g ) * factor) + (bias*0x000100)) >> 4) & 0x003F00);
return rb | g | 0xFF000000;
}
static constexpr u32 ColorBrightnessDown(u32 val, u32 factor, u32 bias) noexcept
{
u32 rb = val & 0x3F003F;
u32 g = val & 0x003F00;
rb -= ((((rb * factor) + (bias*0x010001)) >> 4) & 0x3F003F);
g -= ((((g * factor) + (bias*0x000100)) >> 4) & 0x003F00);
return rb | g | 0xFF000000;
}
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);
};
}
}
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