diff options
| -rw-r--r-- | src/GPU3D.cpp | 10 | ||||
| -rw-r--r-- | src/GPU3D.h | 4 | ||||
| -rw-r--r-- | src/GPU3D_OpenGL43.cpp | 6 |
3 files changed, 19 insertions, 1 deletions
diff --git a/src/GPU3D.cpp b/src/GPU3D.cpp index 68b9c7f..3be8ee1 100644 --- a/src/GPU3D.cpp +++ b/src/GPU3D.cpp @@ -1194,6 +1194,16 @@ void SubmitPolygon() vtx->FinalPosition[0] = posX & 0x1FF; vtx->FinalPosition[1] = posY & 0xFF; + // hi-res positions + if (w != 0) + { + posX = ((((s64)(vtx->Position[0] + w) * Viewport[4]) << 4) / (((s64)w) << 1)) + (Viewport[0] << 4); + posY = ((((s64)(-vtx->Position[1] + w) * Viewport[5]) << 4) / (((s64)w) << 1)) + (Viewport[3] << 4); + + vtx->HiresPosition[0] = posX & 0x1FFF; + vtx->HiresPosition[1] = posY & 0xFFF; + } + 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; diff --git a/src/GPU3D.h b/src/GPU3D.h index ecc23de..53712ad 100644 --- a/src/GPU3D.h +++ b/src/GPU3D.h @@ -39,6 +39,10 @@ typedef struct s32 FinalPosition[2]; s32 FinalColor[3]; + // hi-res position (4-bit fractional part) + // TODO maybe: hi-res color? (that survives clipping) + s32 HiresPosition[2]; + } Vertex; typedef struct diff --git a/src/GPU3D_OpenGL43.cpp b/src/GPU3D_OpenGL43.cpp index cc099f2..1e4f9d7 100644 --- a/src/GPU3D_OpenGL43.cpp +++ b/src/GPU3D_OpenGL43.cpp @@ -1120,9 +1120,13 @@ void BuildPolygons(RendererPolygon* polygons, int npolys) u32 zshift = 0; while (z > 0xFFFF) { z >>= 1; zshift++; } + u32 x = vtx->HiresPosition[0] >> 3; + u32 y = vtx->HiresPosition[1] >> 3; + *vptr++ = x | (y << 16); + // TODO hires-upgraded positions? //*vptr++ = vtx->FinalPosition[0] | (vtx->FinalPosition[1] << 16); - *vptr++ = (vtx->FinalPosition[0] << 1) | (vtx->FinalPosition[1] << 17); + //*vptr++ = (vtx->FinalPosition[0] << 1) | (vtx->FinalPosition[1] << 17); //*vptr++ = (vtx->FinalPosition[0] << 2) | (vtx->FinalPosition[1] << 18); *vptr++ = z | (w << 16); |