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GPU: forward BG0HOFS to internal rendering engine register for 3D layer scroll (only when the rendering engine is enabled).

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fixes #840

thank you RSDuck and Hydr8gon for your insight into this.
This commit is contained in:
Arisotura
2020-12-10 19:12:08 +01:00
parent 1dbe69c6be
commit 66cec85a9a
6 changed files with 81 additions and 37 deletions
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46
src/GPU3D.cpp
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@ -181,6 +181,8 @@ u32 RenderClearAttr1, RenderClearAttr2;
bool RenderFrameIdentical;
u16 RenderXPos;
u32 ZeroDotWLimit;
u32 GXStat;
@ -385,6 +387,8 @@ void Reset()
FlushAttributes = 0;
ResetRenderingState();
RenderXPos = 0;
}
void DoSavestate(Savestate* file)
@ -430,6 +434,8 @@ void DoSavestate(Savestate* file)
file->Var32(&RenderClearAttr1);
file->Var32(&RenderClearAttr2);
file->Var16(&RenderXPos);
file->Var32(&ZeroDotWLimit);
file->Var32(&GXStat);
@ -587,8 +593,6 @@ void DoSavestate(Savestate* file)
}
}
// probably not worth storing the vblank-latched Renderxxxxxx variables
CmdStallQueue->DoSavestate(file);
file->Var32((u32*)&VertexPipeline);
file->Var32((u32*)&NormalPipeline);
@ -2564,14 +2568,48 @@ void VCount215()
#endif
}
void SetRenderXPos(u16 xpos)
{
if (!RenderingEnabled) return;
RenderXPos = xpos & 0x01FF;
}
u32 ScrolledLine[256];
u32* GetLine(int line)
{
if (GPU::Renderer == 0) return SoftRenderer::GetLine(line);
u32* rawline;
if (GPU::Renderer == 0) rawline = SoftRenderer::GetLine(line);
#ifdef OGLRENDERER_ENABLED
else return GLRenderer::GetLine(line);
else rawline = GLRenderer::GetLine(line);
#else
return NULL;
#endif
if (RenderXPos == 0) return rawline;
// apply X scroll
if (RenderXPos & 0x100)
{
int i = 0, j = RenderXPos;
for (; j < 512; i++, j++)
ScrolledLine[i] = 0;
for (j = 0; i < 256; i++, j++)
ScrolledLine[i] = rawline[j];
}
else
{
int i = 0, j = RenderXPos;
for (; j < 256; i++, j++)
ScrolledLine[i] = rawline[j];
for (; i < 256; i++)
ScrolledLine[i] = 0;
}
return ScrolledLine;
}