diff options
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_tritemp.h | 131 |
1 files changed, 67 insertions, 64 deletions
diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h index 74dc13e2997..bb76408081d 100644 --- a/src/mesa/swrast/s_tritemp.h +++ b/src/mesa/swrast/s_tritemp.h @@ -912,15 +912,15 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, #ifdef INTERP_FOG dfogInner = dfogOuter + span.dfogdx; #endif -#if defined(INTERP_RGB) +#ifdef INTERP_RGB fdrInner = fdrOuter + span.redStep; fdgInner = fdgOuter + span.greenStep; fdbInner = fdbOuter + span.blueStep; #endif -#if defined(INTERP_ALPHA) +#ifdef INTERP_ALPHA fdaInner = fdaOuter + span.alphaStep; #endif -#if defined(INTERP_SPEC) +#ifdef INTERP_SPEC dsrInner = dsrOuter + span.specRedStep; dsgInner = dsgOuter + span.specGreenStep; dsbInner = dsbOuter + span.specBlueStep; @@ -962,15 +962,15 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, #ifdef INTERP_FOG span.fog = fogLeft; #endif -#if defined(INTERP_RGB) +#ifdef INTERP_RGB span.red = rLeft; span.green = gLeft; span.blue = bLeft; #endif -#if defined(INTERP_ALPHA) +#ifdef INTERP_ALPHA span.alpha = aLeft; #endif -#if defined(INTERP_SPEC) +#ifdef INTERP_SPEC span.specRed = srLeft; span.specGreen = sgLeft; span.specBlue = sbLeft; @@ -992,68 +992,71 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, ) #endif + if (span.end > 1) { + /* Under rare circumstances, we might have to fudge the + * colors. XXX does this really happen anymore??? + */ + const GLint len = span.end - 1; + (void) len; #ifdef INTERP_RGB - { - /* need this to accomodate round-off errors */ - const GLint len = right - span.x - 1; - GLfixed ffrend = span.red + len * span.redStep; - GLfixed ffgend = span.green + len * span.greenStep; - GLfixed ffbend = span.blue + len * span.blueStep; - if (ffrend < 0) { - span.red -= ffrend; - if (span.red < 0) - span.red = 0; - } - if (ffgend < 0) { - span.green -= ffgend; - if (span.green < 0) - span.green = 0; - } - if (ffbend < 0) { - span.blue -= ffbend; - if (span.blue < 0) - span.blue = 0; + { + GLfixed ffrend = span.red + len * span.redStep; + GLfixed ffgend = span.green + len * span.greenStep; + GLfixed ffbend = span.blue + len * span.blueStep; + if (ffrend < 0) { + span.red -= ffrend; + if (span.red < 0) + span.red = 0; + } + if (ffgend < 0) { + span.green -= ffgend; + if (span.green < 0) + span.green = 0; + } + if (ffbend < 0) { + span.blue -= ffbend; + if (span.blue < 0) + span.blue = 0; + } } - } #endif #ifdef INTERP_ALPHA - { - const GLint len = right - span.x - 1; - GLfixed ffaend = span.alpha + len * span.alphaStep; - if (ffaend < 0) { - span.alpha -= ffaend; - if (span.alpha < 0) - span.alpha = 0; + { + GLfixed ffaend = span.alpha + len * span.alphaStep; + if (ffaend < 0) { + span.alpha -= ffaend; + if (span.alpha < 0) + span.alpha = 0; + } } - } #endif #ifdef INTERP_SPEC - { - /* need this to accomodate round-off errors */ - const GLint len = right - span.x - 1; - GLfixed ffsrend = span.specRed + len * span.specRedStep; - GLfixed ffsgend = span.specGreen + len * span.specGreenStep; - GLfixed ffsbend = span.specBlue + len * span.specBlueStep; - if (ffsrend < 0) { - span.specRed -= ffsrend; - if (span.specRed < 0) - span.specRed = 0; - } - if (ffsgend < 0) { - span.specGreen -= ffsgend; - if (span.specGreen < 0) - span.specGreen = 0; + { + GLfixed ffsrend = span.specRed + len * span.specRedStep; + GLfixed ffsgend = span.specGreen + len * span.specGreenStep; + GLfixed ffsbend = span.specBlue + len * span.specBlueStep; + if (ffsrend < 0) { + span.specRed -= ffsrend; + if (span.specRed < 0) + span.specRed = 0; + } + if (ffsgend < 0) { + span.specGreen -= ffsgend; + if (span.specGreen < 0) + span.specGreen = 0; + } + if (ffsbend < 0) { + span.specBlue -= ffsbend; + if (span.specBlue < 0) + span.specBlue = 0; + } } - if (ffsbend < 0) { - span.specBlue -= ffsbend; - if (span.specBlue < 0) - span.specBlue = 0; - } - } #endif #ifdef INTERP_INDEX - if (span.index < 0) span.index = 0; + if (span.index < 0) + span.index = 0; #endif + } /* span.end > 1 */ /* This is where we actually generate fragments */ if (span.end > 0) { @@ -1066,7 +1069,7 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, * pixel-center x coordinate so that it stays * on or inside the major edge. */ - (span.y)++; + span.y++; lines--; fxLeftEdge += fdxLeftEdge; @@ -1091,15 +1094,15 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, #ifdef INTERP_FOG fogLeft += dfogOuter; #endif -#if defined(INTERP_RGB) +#ifdef INTERP_RGB rLeft += fdrOuter; gLeft += fdgOuter; bLeft += fdbOuter; #endif -#if defined(INTERP_ALPHA) +#ifdef INTERP_ALPHA aLeft += fdaOuter; #endif -#if defined(INTERP_SPEC) +#ifdef INTERP_SPEC srLeft += dsrOuter; sgLeft += dsgOuter; sbLeft += dsbOuter; @@ -1136,15 +1139,15 @@ static void NAME(GLcontext *ctx, const SWvertex *v0, #ifdef INTERP_FOG fogLeft += dfogInner; #endif -#if defined(INTERP_RGB) +#ifdef INTERP_RGB rLeft += fdrInner; gLeft += fdgInner; bLeft += fdbInner; #endif -#if defined(INTERP_ALPHA) +#ifdef INTERP_ALPHA aLeft += fdaInner; #endif -#if defined(INTERP_SPEC) +#ifdef INTERP_SPEC srLeft += dsrInner; sgLeft += dsgInner; sbLeft += dsbInner; |