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fix behavior for rotscale BG reference points

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This commit is contained in:
StapleButter
2017-03-04 02:22:58 +01:00
parent 5c3b7b5c30
commit a7e7af4b47
3 changed files with 32 additions and 22 deletions
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36
GPU2D.cpp
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@ -26,6 +26,7 @@
//
// * BLDCNT special effects are applied on 18bit colors
// -> layers are converted to 18bit before being composited
// -> 'brightness up' effect does: x = x + (63-x)*factor
// * colors are converted as follows: 18bit = 15bit * 2
// -> white comes out as 62,62,62 and not 63,63,63
// * VRAM/FIFO display modes convert colors the same way
@ -76,8 +77,10 @@ void GPU2D::Reset()
memset(BGCnt, 0, 4*2);
memset(BGXPos, 0, 4*2);
memset(BGYPos, 0, 4*2);
memset(BGXCenter, 0, 2*4);
memset(BGYCenter, 0, 2*4);
memset(BGXRef, 0, 2*4);
memset(BGYRef, 0, 2*4);
memset(BGXRefInternal, 0, 2*4);
memset(BGYRefInternal, 0, 2*4);
memset(BGRotA, 0, 2*2);
memset(BGRotB, 0, 2*2);
memset(BGRotC, 0, 2*2);
@ -209,20 +212,24 @@ void GPU2D::Write32(u32 addr, u32 val)
case 0x028:
if (val & 0x08000000) val |= 0xF0000000;
BGXCenter[0] = val;
BGXRef[0] = val;
if (GPU::VCount < 192) BGXRefInternal[0] = val;
return;
case 0x02C:
if (val & 0x08000000) val |= 0xF0000000;
BGYCenter[0] = val;
BGYRef[0] = val;
if (GPU::VCount < 192) BGYRefInternal[0] = val;
return;
case 0x038:
if (val & 0x08000000) val |= 0xF0000000;
BGXCenter[1] = val;
BGXRef[1] = val;
if (GPU::VCount < 192) BGXRefInternal[1] = val;
return;
case 0x03C:
if (val & 0x08000000) val |= 0xF0000000;
BGYCenter[1] = val;
BGYRef[1] = val;
if (GPU::VCount < 192) BGYRefInternal[1] = val;
return;
case 0x064:
@ -366,6 +373,11 @@ void GPU2D::DrawScanline(u32 line)
void GPU2D::VBlank()
{
BGXRefInternal[0] = BGXRef[0];
BGXRefInternal[1] = BGXRef[1];
BGYRefInternal[0] = BGYRef[0];
BGYRefInternal[1] = BGYRef[1];
CaptureCnt &= ~(1<<31);
}
@ -973,12 +985,8 @@ void GPU2D::DrawBG_Extended(u32 line, u32* dst, u32 bgnum)
s16 rotC = BGRotC[bgnum-2];
s16 rotD = BGRotD[bgnum-2];
s32 rotX = BGXCenter[bgnum-2];
s32 rotY = BGYCenter[bgnum-2];
// hax
rotX += line*rotB;
rotY += line*rotD;
s32 rotX = BGXRefInternal[bgnum-2];
s32 rotY = BGYRefInternal[bgnum-2];
if (bgcnt & 0x0080)
{
@ -1081,8 +1089,8 @@ void GPU2D::DrawBG_Extended(u32 line, u32* dst, u32 bgnum)
}
}
//BGXCenter[bgnum-2] += rotB;
//BGYCenter[bgnum-2] += rotD;
BGXRefInternal[bgnum-2] += rotB;
BGYRefInternal[bgnum-2] += rotD;
}
void GPU2D::InterleaveSprites(u32* buf, u32 prio, u32* dst)