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move viewport transform to polygon setup

This commit is contained in:
StapleButter 2017-03-16 15:55:18 +01:00
parent 1dc887d0bb
commit 7f85a10002
3 changed files with 84 additions and 89 deletions
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81
GPU3D.cpp
View File

@ -217,7 +217,7 @@ u32 CurRAMBank;
u32 ClearAttr1, ClearAttr2;
u32 FlushRequest;
u32 FlushAttributes, CurFlushAttributes;
u32 FlushAttributes;
@ -293,7 +293,6 @@ void Reset()
FlushRequest = 0;
FlushAttributes = 0;
CurFlushAttributes = 0;
SoftRenderer::Reset();
}
@ -456,7 +455,6 @@ void ClipSegment(Vertex* outbuf, Vertex* vout, Vertex* vin)
INTERPOLATE(TexCoords[1]);
mid.Clipped = true;
mid.ViewportTransformDone = false;
#undef INTERPOLATE
*outbuf = mid;
@ -765,6 +763,7 @@ void SubmitPolygon()
if (NumPolygons >= 2048 || NumVertices+c > 6144)
{
LastStripPolygon = NULL;
// TODO: set DISP3DCNT overflow flag
return;
}
@ -805,13 +804,79 @@ void SubmitPolygon()
for (int i = clipstart; i < c; i++)
{
CurVertexRAM[NumVertices] = clippedvertices[1][i];
poly->Vertices[i] = &CurVertexRAM[NumVertices];
Vertex* vtx = &CurVertexRAM[NumVertices];
*vtx = clippedvertices[1][i];
poly->Vertices[i] = vtx;
NumVertices++;
poly->NumVertices++;
// viewport transform
s32 posX, posY, posZ;
s32 w = vtx->Position[3];
if (w == 0)
{
posX = 0;
posY = 0;
posZ = 0;
w = 0x1000;
}
else
{
posX = (((s64)(vtx->Position[0] + w) * Viewport[2]) / (((s64)w) << 1)) + Viewport[0];
posY = (((s64)(-vtx->Position[1] + w) * Viewport[3]) / (((s64)w) << 1)) + Viewport[1];
if (FlushAttributes & 0x2) posZ = w;
else posZ = (((s64)vtx->Position[2] * 0x800000) / w) + 0x7FFEFF;
}
if (posX < 0) posX = 0;
else if (posX > 256) posX = 256;
if (posY < 0) posY = 0;
else if (posY > 192) posY = 192;
if (posZ < 0) posZ = 0;
else if (posZ > 0xFFFFFF) posZ = 0xFFFFFF;
vtx->FinalPosition[0] = posX;
vtx->FinalPosition[1] = posY;
vtx->FinalPosition[2] = posZ;
vtx->FinalPosition[3] = w;
vtx->FinalColor[0] = vtx->Color[0] >> 12;
if (vtx->FinalColor[0]) vtx->FinalColor[0] = ((vtx->FinalColor[0] << 4) + 0xF);
vtx->FinalColor[1] = vtx->Color[1] >> 12;
if (vtx->FinalColor[1]) vtx->FinalColor[1] = ((vtx->FinalColor[1] << 4) + 0xF);
vtx->FinalColor[2] = vtx->Color[2] >> 12;
if (vtx->FinalColor[2]) vtx->FinalColor[2] = ((vtx->FinalColor[2] << 4) + 0xF);
}
// determine bounds of the polygon
u32 vtop = 0, vbot = 0;
s32 ytop = 192, ybot = 0;
s32 xtop = 256, xbot = 0;
for (int i = 0; i < c; i++)
{
Vertex* vtx = poly->Vertices[i];
if (vtx->FinalPosition[1] < ytop || (vtx->FinalPosition[1] == ytop && vtx->FinalPosition[0] < xtop))
{
xtop = vtx->FinalPosition[0];
ytop = vtx->FinalPosition[1];
vtop = i;
}
if (vtx->FinalPosition[1] > ybot || (vtx->FinalPosition[1] == ybot && vtx->FinalPosition[0] > xbot))
{
xbot = vtx->FinalPosition[0];
ybot = vtx->FinalPosition[1];
vbot = i;
}
}
poly->VTop = vtop; poly->VBottom = vbot;
poly->YTop = ytop; poly->YBottom = ybot;
poly->XTop = xtop; poly->XBottom = xbot;
if (PolygonMode >= 2)
LastStripPolygon = poly;
else
@ -845,7 +910,6 @@ void SubmitVertex()
}
vertextrans->Clipped = false;
vertextrans->ViewportTransformDone = false;
VertexNum++;
VertexNumInPoly++;
@ -1562,9 +1626,7 @@ void VBlank()
{
if (FlushRequest)
{
SoftRenderer::DispCnt = DispCnt;
SoftRenderer::AlphaRef = AlphaRef;
SoftRenderer::RenderFrame(CurFlushAttributes, CurVertexRAM, CurPolygonRAM, NumPolygons);
SoftRenderer::RenderFrame(CurVertexRAM, CurPolygonRAM, NumPolygons);
CurRAMBank = CurRAMBank?0:1;
CurVertexRAM = &VertexRAM[CurRAMBank ? 6144 : 0];
@ -1574,7 +1636,6 @@ void VBlank()
NumPolygons = 0;
FlushRequest = 0;
CurFlushAttributes = FlushAttributes;
}
}

12
GPU3D.h
View File

@ -36,8 +36,6 @@ typedef struct
s32 FinalPosition[4];
s32 FinalColor[3];
bool ViewportTransformDone;
} Vertex;
typedef struct
@ -52,9 +50,14 @@ typedef struct
bool FacingView;
bool Translucent;
u32 VTop, VBottom; // vertex indices
s32 YTop, YBottom; // Y coords
s32 XTop, XBottom; // associated X coords
} Polygon;
extern u32 DispCnt;
extern u32 AlphaRef;
extern s32 Viewport[4];
extern u32 ClearAttr1, ClearAttr2;
@ -81,14 +84,11 @@ void Write32(u32 addr, u32 val);
namespace SoftRenderer
{
extern u32 DispCnt;
extern u32 AlphaRef;
bool Init();
void DeInit();
void Reset();
void RenderFrame(u32 attr, Vertex* vertices, Polygon* polygons, int npolys);
void RenderFrame(Vertex* vertices, Polygon* polygons, int npolys);
u32* GetLine(int line);
}

80
GPU3D_Soft.cpp
View File

@ -27,9 +27,6 @@ namespace GPU3D
namespace SoftRenderer
{
u32 DispCnt;
u32 AlphaRef;
u32 ColorBuffer[256*192];
u32 DepthBuffer[256*192];
u32 AttrBuffer[256*192];
@ -336,77 +333,14 @@ u32 RenderPixel(Polygon* polygon, s32 x, s32 y, s32 z, u8 vr, u8 vg, u8 vb, s16
return r | (g << 8) | (b << 16) | (a << 24);
}
void RenderPolygon(Polygon* polygon, u32 wbuffer)
void RenderPolygon(Polygon* polygon)
{
int nverts = polygon->NumVertices;
bool isline = false;
int vtop = 0, vbot = 0;
s32 ytop = 192, ybot = 0;
s32 xtop = 256, xbot = 0;
// process the vertices, transform to screen coordinates
// find the topmost and bottommost vertices of the polygon
for (int i = 0; i < nverts; i++)
{
Vertex* vtx = polygon->Vertices[i];
if (!vtx->ViewportTransformDone)
{
s32 posX, posY, posZ;
s32 w = vtx->Position[3];
if (w == 0)
{
posX = 0;
posY = 0;
posZ = 0;
w = 0x1000;
}
else
{
posX = (((s64)(vtx->Position[0] + w) * Viewport[2]) / (((s64)w) << 1)) + Viewport[0];
posY = (((s64)(-vtx->Position[1] + w) * Viewport[3]) / (((s64)w) << 1)) + Viewport[1];
if (wbuffer) posZ = w;
else posZ = (((s64)vtx->Position[2] * 0x800000) / w) + 0x7FFEFF;
}
if (posX < 0) posX = 0;
else if (posX > 256) posX = 256;
if (posY < 0) posY = 0;
else if (posY > 192) posY = 192;
if (posZ < 0) posZ = 0;
else if (posZ > 0xFFFFFF) posZ = 0xFFFFFF;
vtx->FinalPosition[0] = posX;
vtx->FinalPosition[1] = posY;
vtx->FinalPosition[2] = posZ;
vtx->FinalPosition[3] = w;
vtx->FinalColor[0] = vtx->Color[0] >> 12;
if (vtx->FinalColor[0]) vtx->FinalColor[0] = ((vtx->FinalColor[0] << 4) + 0xF);
vtx->FinalColor[1] = vtx->Color[1] >> 12;
if (vtx->FinalColor[1]) vtx->FinalColor[1] = ((vtx->FinalColor[1] << 4) + 0xF);
vtx->FinalColor[2] = vtx->Color[2] >> 12;
if (vtx->FinalColor[2]) vtx->FinalColor[2] = ((vtx->FinalColor[2] << 4) + 0xF);
vtx->ViewportTransformDone = true;
}
if (vtx->FinalPosition[1] < ytop || (vtx->FinalPosition[1] == ytop && vtx->FinalPosition[0] < xtop))
{
xtop = vtx->FinalPosition[0];
ytop = vtx->FinalPosition[1];
vtop = i;
}
if (vtx->FinalPosition[1] > ybot || (vtx->FinalPosition[1] == ybot && vtx->FinalPosition[0] > xbot))
{
xbot = vtx->FinalPosition[0];
ybot = vtx->FinalPosition[1];
vbot = i;
}
}
int vtop = polygon->VTop, vbot = polygon->VBottom;
s32 ytop = polygon->YTop, ybot = polygon->YBottom;
s32 xtop = polygon->XTop, xbot = polygon->XBottom;
if (ytop > 191) return;
@ -837,7 +771,7 @@ void RenderPolygon(Polygon* polygon, u32 wbuffer)
}
}
void RenderFrame(u32 attr, Vertex* vertices, Polygon* polygons, int npolys)
void RenderFrame(Vertex* vertices, Polygon* polygons, int npolys)
{
u32 polyid = (ClearAttr1 >> 24) & 0x3F;
@ -900,13 +834,13 @@ void RenderFrame(u32 attr, Vertex* vertices, Polygon* polygons, int npolys)
for (int i = 0; i < npolys; i++)
{
if (polygons[i].Translucent) continue;
RenderPolygon(&polygons[i], attr&0x2);
RenderPolygon(&polygons[i]);
}
for (int i = 0; i < npolys; i++)
{
if (!polygons[i].Translucent) continue;
RenderPolygon(&polygons[i], attr&0x2);
RenderPolygon(&polygons[i]);
}
}