diff options
Diffstat (limited to 'src/GPU3D_Soft.cpp')
| -rw-r--r-- | src/GPU3D_Soft.cpp | 88 |
1 files changed, 48 insertions, 40 deletions
diff --git a/src/GPU3D_Soft.cpp b/src/GPU3D_Soft.cpp index e78524d..07f5ea7 100644 --- a/src/GPU3D_Soft.cpp +++ b/src/GPU3D_Soft.cpp @@ -248,6 +248,7 @@ public: this->xmax = this->xmin; } + // TODO: check the precision of the slope increment on hardware if (y0 == y1) Increment = 0; else @@ -280,27 +281,44 @@ public: else dx = 0; } + s32 x = XVal(); + if (XMajor) { if (side) Interp.Setup(x0-1, x1-1, w0, w1, 9); // checkme else Interp.Setup(x0, x1, w0, w1, 9); + Interp.SetX(x); + + // used for calculating AA coverage + //inv_incr = (1 << (16+10)) / Increment; + } + else + { + Interp.Setup(y0, y1, w0, w1, 9); + Interp.SetX(y); + + //ycov_incr = Increment >> 2; + //ycoverage = ycov_incr >> 1; } - else Interp.Setup(y0, y1, w0, w1, 9); - s32 x = XVal(); - if (XMajor) Interp.SetX(x); - else Interp.SetX(y); return x; } -s32 DX() { return dx; } + s32 Step() { dx += Increment; y++; s32 x = XVal(); - if (XMajor) Interp.SetX(x); - else Interp.SetX(y); + if (XMajor) + { + Interp.SetX(x); + } + else + { + Interp.SetX(y); + //ycoverage += ycov_incr; + } return x; } @@ -323,22 +341,24 @@ s32 DX() { return dx; } *length = ((dx+Increment) >> 16) - (dx >> 16); // for X-major edges, coverage will be calculated later - *coverage = -1; + // we just return the factor for it + *coverage = 31;//inv_incr | (1<<31); } void EdgeParams_YMajor(s32* length, s32* coverage) { *length = 1; - if (Increment == 0) + /*if (Increment == 0) { *coverage = 31; } else { - *coverage = (dx & 0xF800) >> 11; + *coverage = (ycoverage >> 9) & 0x1F; if (!(side ^ Negative)) *coverage = 0x1F - *coverage; - } + }*/ + *coverage = 31; } void EdgeParams(s32* length, s32* coverage) @@ -349,23 +369,6 @@ s32 DX() { return dx; } return EdgeParams_YMajor(length, coverage); } - /*s32 EdgeLimit() - { - s32 ret; - if (side) - { - if (Negative) ret = x0 - ((dx+Increment) >> 16); - else ret = x0 + ((dx-Increment) >> 16); - } - else - { - if (Negative) ret = x0 - ((dx-Increment) >> 16); - else ret = x0 + ((dx+Increment) >> 16); - } - - return ret; - }*/ - s32 Increment; bool Negative; bool XMajor; @@ -375,6 +378,9 @@ private: s32 x0, xmin, xmax; s32 dx; s32 y; + + s32 inv_incr; + s32 ycoverage, ycov_incr; }; typedef struct @@ -624,7 +630,7 @@ bool DepthTest(s32 oldz, s32 z) if (func_equal) { s32 diff = oldz - z; - if ((u32)(diff + 0x200) <= 0x400) + if ((u32)(diff + 0xFF) <= 0x1FE) // range is +-0xFF return true; } else @@ -834,10 +840,7 @@ void SetupPolygon(RendererPolygon* rp, Polygon* polygon) if (ybot == ytop) { - //ybot++; - vtop = 0; vbot = 0; - //xtop = 256; xbot = 0; int i; i = 1; @@ -897,8 +900,6 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) bool l_filledge, r_filledge; s32 l_edgelen, r_edgelen; s32 l_edgecov, r_edgecov; - //Slope* slope_start; - //Slope* slope_end; Interpolator* interp_start; Interpolator* interp_end; @@ -993,7 +994,7 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) for (; x < xstart+l_edgelen; x++) { u32 pixeladdr = 258*3 + 1 + (y*258*3) + x; - u32 attr = (polygon->Attr & 0x3F008000) | edge; + u32 attr = (polygon->Attr & 0x3F008000); // check stencil buffer for shadows if (polygon->IsShadow) @@ -1055,6 +1056,8 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) if (alpha == 31) { + attr |= edge; + if (RenderDispCnt & (1<<4)) { // anti-aliasing: all edges are rendered @@ -1076,6 +1079,8 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) cov = r_edgecov; if (cov == -1) cov = ((xend - x) << 5) / r_edgelen; }cov=31;*/ + cov = l_edgecov; + if (cov == -1) cov = 31; attr |= (cov << 8); // push old pixel down if needed @@ -1127,7 +1132,7 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) else for (; x <= xend-r_edgelen; x++) { u32 pixeladdr = 258*3 + 1 + (y*258*3) + x; - u32 attr = (polygon->Attr & 0x3F008000) | edge; + u32 attr = (polygon->Attr & 0x3F008000); // check stencil buffer for shadows if (polygon->IsShadow) @@ -1179,6 +1184,7 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) if (alpha == 31) { + attr |= edge; DepthBuffer[pixeladdr] = z; } else @@ -1217,7 +1223,7 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) for (; x <= xend; x++) { u32 pixeladdr = 258*3 + 1 + (y*258*3) + x; - u32 attr = (polygon->Attr & 0x3F008000) | edge; + u32 attr = (polygon->Attr & 0x3F008000); // check stencil buffer for shadows if (polygon->IsShadow) @@ -1279,6 +1285,8 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) if (alpha == 31) { + attr |= edge; + if (RenderDispCnt & (1<<4)) { // anti-aliasing: all edges are rendered @@ -1300,6 +1308,8 @@ void RenderPolygonScanline(RendererPolygon* rp, s32 y) cov = r_edgecov; if (cov == -1) cov = ((xend - x) << 5) / r_edgelen; }cov=31;*/ + cov = r_edgecov; + if (cov == -1) cov = 31; attr |= (cov << 8); // push old pixel down if needed @@ -1502,7 +1512,7 @@ void ScanlineFinalPass(s32 y) u32 botG = (botcolor >> 8) & 0x3F; u32 botB = (botcolor >> 16) & 0x3F; u32 botA = (botcolor >> 24) & 0x1F; -if (y==48) printf("x=%d: cov=%d\n", x, coverage); +//if (y==48) printf("x=%d: cov=%d\n", x, coverage); coverage++; // only blend color if the bottom pixel isn't fully transparent @@ -1528,8 +1538,6 @@ void ClearBuffers() u32 polyid = RenderClearAttr1 & 0x3F000000; // fill screen borders for edge marking - // CHECKME - // GBAtek is unsure about the polygon ID, and nothing is said about Z for (int x = 0; x < 258; x++) { |