diff options
author | Brian Paul <[email protected]> | 2004-03-14 18:12:06 +0000 |
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committer | Brian Paul <[email protected]> | 2004-03-14 18:12:06 +0000 |
commit | 7d05e484783cc81d2f9d4ceb2b1e1252555ffef0 (patch) | |
tree | 4f2f5c16dc1bc34f24b9898a1b69b5c922c4067e | |
parent | 3340a9ea9ea31e6bd7f37d5c1f25ffcc97f20a6b (diff) |
more TRIANGLE_WALK_DOUBLE tweaks (Justin Novosad)
-rw-r--r-- | src/mesa/swrast/s_tritemp.h | 105 |
1 files changed, 80 insertions, 25 deletions
diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h index 3362f3892d1..89f7d29bf84 100644 --- a/src/mesa/swrast/s_tritemp.h +++ b/src/mesa/swrast/s_tritemp.h @@ -152,17 +152,20 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, GLdouble dy; /* Y(v1) - Y(v0) */ GLdouble dxdy; /* dx/dy */ GLdouble adjy; /* adjust from v[0]->fy to fsy, scaled */ + GLdouble fsx; /* first sample point x coord */ + GLdouble fsy; + GLdouble fx0; /*X of lower endpoint */ #else GLfloat dx; /* X(v1) - X(v0) */ GLfloat dy; /* Y(v1) - Y(v0) */ GLfloat dxdy; /* dx/dy */ GLfixed fdxdy; /* dx/dy in fixed-point */ GLfloat adjy; /* adjust from v[0]->fy to fsy, scaled */ -#endif GLfixed fsx; /* first sample point x coord */ GLfixed fsy; - GLint lines; /* number of lines to be sampled on this edge */ GLfixed fx0; /* fixed pt X of lower endpoint */ +#endif + GLint lines; /* number of lines to be sampled on this edge */ } EdgeT; #ifdef INTERP_Z @@ -175,8 +178,10 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, GLfloat oneOverArea; const SWvertex *vMin, *vMid, *vMax; /* Y(vMin)<=Y(vMid)<=Y(vMax) */ GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign; +#if !TRIANGLE_WALK_DOUBLE const GLint snapMask = ~((FIXED_ONE / (1 << SUB_PIXEL_BITS)) - 1); /* for x/y coord snapping */ - GLfixed vMin_fx, vMin_fy, vMid_fx, vMid_fy, vMax_fx, vMax_fy; +#endif + GLinterp vMin_fx, vMin_fy, vMid_fx, vMid_fy, vMax_fx, vMax_fy; struct sw_span span; @@ -192,18 +197,24 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, printf(" %g, %g, %g\n", v1->win[0], v1->win[1], v1->win[2]); printf(" %g, %g, %g\n", v2->win[0], v2->win[1], v2->win[2]); */ + /* ASSERT(v0->win[2] >= 0.0); ASSERT(v1->win[2] >= 0.0); ASSERT(v2->win[2] >= 0.0); - + */ /* Compute fixed point x,y coords w/ half-pixel offsets and snapping. * And find the order of the 3 vertices along the Y axis. */ { +#if TRIANGLE_WALK_DOUBLE + const GLdouble fy0 = v0->win[1] - 0.5; + const GLdouble fy1 = v1->win[1] - 0.5; + const GLdouble fy2 = v2->win[1] - 0.5; +#else const GLfixed fy0 = FloatToFixed(v0->win[1] - 0.5F) & snapMask; const GLfixed fy1 = FloatToFixed(v1->win[1] - 0.5F) & snapMask; const GLfixed fy2 = FloatToFixed(v2->win[1] - 0.5F) & snapMask; - +#endif if (fy0 <= fy1) { if (fy1 <= fy2) { /* y0 <= y1 <= y2 */ @@ -243,9 +254,15 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, } /* fixed point X coords */ +#if TRIANGLE_WALK_DOUBLE + vMin_fx = vMin->win[0] + 0.5; + vMid_fx = vMid->win[0] + 0.5; + vMax_fx = vMax->win[0] + 0.5; +#else vMin_fx = FloatToFixed(vMin->win[0] + 0.5F) & snapMask; vMid_fx = FloatToFixed(vMid->win[0] + 0.5F) & snapMask; vMax_fx = FloatToFixed(vMax->win[0] + 0.5F) & snapMask; +#endif } /* vertex/edge relationship */ @@ -255,12 +272,12 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, /* compute deltas for each edge: vertex[upper] - vertex[lower] */ #if TRIANGLE_WALK_DOUBLE - eMaj.dx = FixedToDouble(vMax_fx - vMin_fx); - eMaj.dy = FixedToDouble(vMax_fy - vMin_fy); - eTop.dx = FixedToDouble(vMax_fx - vMid_fx); - eTop.dy = FixedToDouble(vMax_fy - vMid_fy); - eBot.dx = FixedToDouble(vMid_fx - vMin_fx); - eBot.dy = FixedToDouble(vMid_fy - vMin_fy); + eMaj.dx = vMax_fx - vMin_fx; + eMaj.dy = vMax_fy - vMin_fy; + eTop.dx = vMax_fx - vMid_fx; + eTop.dy = vMax_fy - vMid_fy; + eBot.dx = vMid_fx - vMin_fx; + eBot.dy = vMid_fy - vMin_fy; #else eMaj.dx = FixedToFloat(vMax_fx - vMin_fx); eMaj.dy = FixedToFloat(vMax_fy - vMin_fy); @@ -272,8 +289,11 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, /* compute area, oneOverArea and perform backface culling */ { +#if TRIANGLE_WALK_DOUBLE + const GLdouble area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy; +#else const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy; - +#endif /* Do backface culling */ if (area * bf < 0.0) return; @@ -291,43 +311,70 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, /* Edge setup. For a triangle strip these could be reused... */ { +#if TRIANGLE_WALK_DOUBLE + eMaj.fsy = CEILF(vMin_fy); + eMaj.lines = (GLint) CEILF(vMax_fy - eMaj.fsy); +#else eMaj.fsy = FixedCeil(vMin_fy); eMaj.lines = FixedToInt(FixedCeil(vMax_fy - eMaj.fsy)); +#endif if (eMaj.lines > 0) { eMaj.dxdy = eMaj.dx / eMaj.dy; -#ifndef INTERP_DOUBLE +#if TRIANGLE_WALK_DOUBLE + eMaj.adjy = (eMaj.fsy - vMin_fy) * FIXED_SCALE; /* SCALED! */ + eMaj.fx0 = vMin_fx; + eMaj.fsx = eMaj.fx0 + (eMaj.adjy * eMaj.dxdy) / (GLdouble) FIXED_SCALE; +#else eMaj.fdxdy = SignedFloatToFixed(eMaj.dxdy); -#endif eMaj.adjy = (GLfloat) (eMaj.fsy - vMin_fy); /* SCALED! */ eMaj.fx0 = vMin_fx; eMaj.fsx = eMaj.fx0 + (GLfixed) (eMaj.adjy * eMaj.dxdy); +#endif } else { return; /*CULLED*/ } +#if TRIANGLE_WALK_DOUBLE + eTop.fsy = CEILF(vMid_fy); + eTop.lines = (GLint) CEILF(vMax_fy - eTop.fsy); +#else eTop.fsy = FixedCeil(vMid_fy); eTop.lines = FixedToInt(FixedCeil(vMax_fy - eTop.fsy)); +#endif if (eTop.lines > 0) { eTop.dxdy = eTop.dx / eTop.dy; -#ifndef INTERP_DOUBLE +#if TRIANGLE_WALK_DOUBLE + eTop.adjy = (eTop.fsy - vMid_fy) * FIXED_SCALE; /* SCALED! */ + eTop.fx0 = vMid_fx; + eTop.fsx = eTop.fx0 + (eTop.adjy * eTop.dxdy) / (GLdouble) FIXED_SCALE; +#else eTop.fdxdy = SignedFloatToFixed(eTop.dxdy); -#endif eTop.adjy = (GLfloat) (eTop.fsy - vMid_fy); /* SCALED! */ eTop.fx0 = vMid_fx; eTop.fsx = eTop.fx0 + (GLfixed) (eTop.adjy * eTop.dxdy); +#endif } +#if TRIANGLE_WALK_DOUBLE + eBot.fsy = CEILF(vMin_fy); + eBot.lines = (GLint) CEILF(vMid_fy - eBot.fsy); +#else eBot.fsy = FixedCeil(vMin_fy); eBot.lines = FixedToInt(FixedCeil(vMid_fy - eBot.fsy)); +#endif if (eBot.lines > 0) { eBot.dxdy = eBot.dx / eBot.dy; -#ifndef INTERP_DOUBLE +#if TRIANGLE_WALK_DOUBLE + eBot.adjy = (eBot.fsy - vMin_fy) * FIXED_SCALE; /* SCALED! */ + eBot.fx0 = vMin_fx; + eBot.fsx = eBot.fx0 + (eBot.adjy * eBot.dxdy) / (GLdouble) FIXED_SCALE; +#else eBot.fdxdy = SignedFloatToFixed(eBot.dxdy); -#endif eBot.adjy = (GLfloat) (eBot.fsy - vMin_fy); /* SCALED! */ eBot.fx0 = vMin_fx; eBot.fsx = eBot.fx0 + (GLfixed) (eBot.adjy * eBot.dxdy); +#endif } } @@ -730,21 +777,29 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, if (setupLeft && eLeft->lines > 0) { const SWvertex *vLower = eLeft->v0; - const GLfixed fsx = eLeft->fsx; /* no fractional part */ +#if TRIANGLE_WALK_DOUBLE + const GLdouble fsy = eLeft->fsy; + const GLdouble fsx = eLeft->fsx; + const GLdouble fx = CEILF(fsx); + const GLdouble adjx = (fx - eLeft->fx0) * FIXED_SCALE; /* SCALED! */ +#else const GLfixed fsy = eLeft->fsy; + const GLfixed fsx = eLeft->fsx; /* no fractional part */ const GLfixed fx = FixedCeil(fsx); /* no fractional part */ - const GLinterp adjx = (GLinterp) (fx - eLeft->fx0); /* SCALED! */ + const GLfixed adjx = (GLinterp) (fx - eLeft->fx0); /* SCALED! */ +#endif const GLinterp adjy = eLeft->adjy; /* SCALED! */ GLint idxOuter; #if TRIANGLE_WALK_DOUBLE GLdouble dxOuter; - fError = FixedToFloat(fx - fsx - FIXED_ONE); - fxLeftEdge = FixedToFloat(fsx); + fError = fx - fsx - 1.0; + fxLeftEdge = fsx; fdxLeftEdge = eLeft->dxdy; - dxOuter = floor(fdxLeftEdge); + dxOuter = FLOORF(fdxLeftEdge); fdError = dxOuter - fdxLeftEdge + 1.0; idxOuter = (GLint) dxOuter; + span.y = (GLint) fsy; #else GLfloat dxOuter; GLfixed fdxOuter; @@ -756,8 +811,8 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, fdError = fdxOuter - fdxLeftEdge + FIXED_ONE; idxOuter = FixedToInt(fdxOuter); dxOuter = (GLfloat) idxOuter; -#endif span.y = FixedToInt(fsy); +#endif /* silence warnings on some compilers */ (void) dxOuter; @@ -950,7 +1005,7 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, if (setupRight && eRight->lines>0) { #if TRIANGLE_WALK_DOUBLE - fxRightEdge = FixedToDouble(eRight->fsx); + fxRightEdge = eRight->fsx; fdxRightEdge = eRight->dxdy; #else fxRightEdge = eRight->fsx - FIXED_EPSILON; |