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melonDS
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tile hflip/vflip for text BGs. 

256-color mode for text BGs.
This commit is contained in:
StapleButter 2017-02-01 23:43:02 +01:00
parent c19056a564
commit 3451e41bd1
4 changed files with 129 additions and 85 deletions
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205
GPU2D.cpp
View File

@ -174,6 +174,57 @@ void GPU2D::DrawScanline(u32 line)
// temp. hax
#define DrawBG_Text DrawBG_Text_4bpp
template<u32 bgmode>
void GPU2D::DrawScanlineBGMode(u32 line, u32* spritebuf, u16* dst)
{
for (int i = 3; i >= 0; i--)
{
if ((BGCnt[3] & 0x3) == i)
{
if (DispCnt & 0x0800)
{
if (bgmode >= 3)
{} // todo: ext
else if (bgmode >= 1)
{} // todo: rotscale
else
DrawBG_Text(line, dst, 3);
}
}
if ((BGCnt[2] & 0x3) == i)
{
if (DispCnt & 0x0400)
{
if (bgmode == 5)
{} // todo: ext
else if (bgmode == 4 || bgmode == 2)
{} // todo: rotscale
else
DrawBG_Text(line, dst, 2);
}
}
if ((BGCnt[1] & 0x3) == i)
{
if (DispCnt & 0x0200)
{
DrawBG_Text(line, dst, 1);
}
}
if ((BGCnt[0] & 0x3) == i)
{
if (DispCnt & 0x0100)
{
if ((!Num) && (DispCnt & 0x8))
{} // TODO
else
DrawBG_Text(line, dst, 0);
}
}
if (DispCnt & 0x1000)
InterleaveSprites(spritebuf, 0x8000 | (i<<16), dst);
}
}
void GPU2D::DrawScanline_Mode1(u32 line, u16* dst)
{
u32 backdrop;
@ -193,61 +244,12 @@ void GPU2D::DrawScanline_Mode1(u32 line, u16* dst)
switch (DispCnt & 0x7)
{
case 0:
for (int i = 3; i >= 0; i--)
{
if ((BGCnt[3] & 0x3) == i)
{
if (DispCnt & 0x0800)
DrawBG_Text(line, dst, 3);
}
if ((BGCnt[2] & 0x3) == i)
{
if (DispCnt & 0x0400)
DrawBG_Text(line, dst, 2);
}
if ((BGCnt[1] & 0x3) == i)
{
if (DispCnt & 0x0200)
DrawBG_Text(line, dst, 1);
}
if ((BGCnt[0] & 0x3) == i)
{
if (DispCnt & 0x0100)
DrawBG_Text(line, dst, 0);
}
if (DispCnt & 0x1000)
InterleaveSprites(spritebuf, 0x8000 | (i<<16), dst);
}
break;
case 5:
for (int i = 3; i >= 0; i--)
{
if ((BGCnt[3] & 0x3) == i)
{
//if (DispCnt & 0x0800)
// ext todo
}
if ((BGCnt[2] & 0x3) == i)
{
//if (DispCnt & 0x0400)
// ext todo
}
if ((BGCnt[1] & 0x3) == i)
{
if (DispCnt & 0x0200)
DrawBG_Text(line, dst, 1);
}
if ((BGCnt[0] & 0x3) == i)
{
if (DispCnt & 0x0100)
DrawBG_Text(line, dst, 0);
}
if (DispCnt & 0x1000)
InterleaveSprites(spritebuf, 0x8000 | (i<<16), dst);
}
break;
case 0: DrawScanlineBGMode<0>(line, spritebuf, dst); break;
case 1: DrawScanlineBGMode<1>(line, spritebuf, dst); break;
case 2: DrawScanlineBGMode<2>(line, spritebuf, dst); break;
case 3: DrawScanlineBGMode<3>(line, spritebuf, dst); break;
case 4: DrawScanlineBGMode<4>(line, spritebuf, dst); break;
case 5: DrawScanlineBGMode<5>(line, spritebuf, dst); break;
}
// debug crap
@ -255,8 +257,7 @@ void GPU2D::DrawScanline_Mode1(u32 line, u16* dst)
// dst[i] = *(u16*)&GPU::Palette[Num*0x400 + (i>>4)*2 + (line>>4)*32];
}
// char 06218000
// screen 06208000
void GPU2D::DrawBG_Text_4bpp(u32 line, u16* dst, u32 bgnum)
{
u16 bgcnt = BGCnt[bgnum];
@ -304,42 +305,84 @@ void GPU2D::DrawBG_Text_4bpp(u32 line, u16* dst, u32 bgnum)
u16* curpal;
u8* pixels;
// preload shit as needed
if (xoff & 0x7)
if (bgcnt & 0x0080)
{
// load a new tile
curtile = tilemap[((xoff & 0xFF) >> 3) + ((xoff & widexmask) << 2)];
curpal = pal + ((curtile & 0xF000) >> 8);
pixels = tileset + ((curtile & 0x03FF) << 5) + ((yoff & 0x7) << 2);
pixels += ((xoff & 0x7) >> 1);
}
// 256-color
for (int i = 0; i < 256; i++)
// preload shit as needed
if (xoff & 0x7)
{
// load a new tile
curtile = tilemap[((xoff & 0xFF) >> 3) + ((xoff & widexmask) << 2)];
curpal = pal;// + ((curtile & 0xF000) >> 8); // TODO: this applies to ext palettes
pixels = tileset + ((curtile & 0x03FF) << 6);
pixels += (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 3);
}
for (int i = 0; i < 256; i++)
{
if (!(xoff & 0x7))
{
// load a new tile
curtile = tilemap[((xoff & 0xFF) >> 3) + ((xoff & widexmask) << 2)];
curpal = pal;// + ((curtile & 0xF000) >> 8);
pixels = tileset + ((curtile & 0x03FF) << 6);
pixels += (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 3);
}
// draw pixel
u8 color;
u32 tilexoff = (curtile & 0x0400) ? (7-(xoff&0x7)) : (xoff&0x7);
color = pixels[tilexoff];
if (color)
dst[i] = curpal[color];
xoff++;
}
}
else
{
if (!(xoff & 0x7))
// 16-color
// preload shit as needed
if (xoff & 0x7)
{
// load a new tile
curtile = tilemap[((xoff & 0xFF) >> 3) + ((xoff & widexmask) << 2)];
curpal = pal + ((curtile & 0xF000) >> 8);
pixels = tileset + ((curtile & 0x03FF) << 5) + ((yoff & 0x7) << 2);
pixels = tileset + ((curtile & 0x03FF) << 5);
pixels += (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 2);
}
// draw pixel
u8 color;
if (xoff & 0x1)
for (int i = 0; i < 256; i++)
{
color = *pixels >> 4;
pixels++;
}
else
{
color = *pixels & 0x0F;
}
if (!(xoff & 0x7))
{
// load a new tile
curtile = tilemap[((xoff & 0xFF) >> 3) + ((xoff & widexmask) << 2)];
curpal = pal + ((curtile & 0xF000) >> 8);
pixels = tileset + ((curtile & 0x03FF) << 5);
pixels += (((curtile & 0x0800) ? (7-(yoff&0x7)) : (yoff&0x7)) << 2);
}
if (color)
dst[i] = curpal[color];
// draw pixel
u8 color;
u32 tilexoff = (curtile & 0x0400) ? (7-(xoff&0x7)) : (xoff&0x7);
if (tilexoff & 0x1)
{
color = pixels[tilexoff>>1] >> 4;
}
else
{
color = pixels[tilexoff>>1] & 0x0F;
}
xoff++;
if (color)
dst[i] = curpal[color];
xoff++;
}
}
}

1
GPU2D.h
View File

@ -48,6 +48,7 @@ private:
u16 BGXPos[4];
u16 BGYPos[4];
template<u32 bgmode> void DrawScanlineBGMode(u32 line, u32* spritebuf, u16* dst);
void DrawScanline_Mode1(u32 line, u16* dst);
void DrawBG_Text_4bpp(u32 line, u16* dst, u32 num);

2
NDS.cpp
View File

@ -274,7 +274,7 @@ void Reset()
// test
//LoadROM();
//LoadFirmware();
NDSCart::LoadROM("rom/sm64ds.nds");
NDSCart::LoadROM("rom/nsmb.nds");
Running = true; // hax
}

6
melonDS.depend
View File

@ -10,7 +10,7 @@
1481161027 c:\documents\sources\melonds\types.h
1485982397 source:c:\documents\sources\melonds\nds.cpp
1485988849 source:c:\documents\sources\melonds\nds.cpp
<stdio.h>
<string.h>
"NDS.h"
@ -86,13 +86,13 @@
"NDS.h"
"SPI.h"
1485971044 source:c:\documents\sources\melonds\gpu2d.cpp
1485988879 source:c:\documents\sources\melonds\gpu2d.cpp
<stdio.h>
<string.h>
"NDS.h"
"GPU.h"
1484969589 c:\documents\sources\melonds\gpu2d.h
1485985325 c:\documents\sources\melonds\gpu2d.h
1481040524 c:\documents\sources\melonds\wifi.h