-/* $Id: s_tritemp.h,v 1.35 2002/03/16 18:02:08 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 7.0
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-/* $XFree86: xc/extras/Mesa/src/swrast/s_tritemp.h,v 1.2 2002/02/27 21:07:54 tsi Exp $ */
/*
* Triangle Rasterizer Template
* This file is #include'd to generate custom triangle rasterizers.
*
* The following macros may be defined to indicate what auxillary information
- * must be interplated across the triangle:
- * INTERP_Z - if defined, interpolate Z values
- * INTERP_FOG - if defined, interpolate fog values
- * INTERP_RGB - if defined, interpolate RGB values
- * INTERP_ALPHA - if defined, interpolate Alpha values (req's INTERP_RGB)
- * INTERP_SPEC - if defined, interpolate specular RGB values
+ * must be interpolated across the triangle:
+ * INTERP_Z - if defined, interpolate integer Z values
+ * INTERP_RGB - if defined, interpolate integer RGB values
+ * INTERP_ALPHA - if defined, interpolate integer Alpha values
* INTERP_INDEX - if defined, interpolate color index values
* INTERP_INT_TEX - if defined, interpolate integer ST texcoords
- * (fast, simple 2-D texture mapping)
- * INTERP_TEX - if defined, interpolate set 0 float STRQ texcoords
- * NOTE: OpenGL STRQ = Mesa STUV (R was taken for red)
- * INTERP_MULTITEX - if defined, interpolate N units of STRQ texcoords
- * INTERP_FLOAT_RGBA - if defined, interpolate RGBA with floating point
- * INTERP_FLOAT_SPEC - if defined, interpolate specular with floating point
+ * (fast, simple 2-D texture mapping, without
+ * perspective correction)
+ * INTERP_ATTRIBS - if defined, interpolate arbitrary attribs (texcoords,
+ * varying vars, etc) This also causes W to be
+ * computed for perspective correction).
*
* When one can directly address pixels in the color buffer the following
* macros can be defined and used to compute pixel addresses during
* Y==0 at bottom of screen and increases upward.
*
* Similarly, for direct depth buffer access, this type is used for depth
- * buffer addressing:
+ * buffer addressing (see zRow):
* DEPTH_TYPE - either GLushort or GLuint
*
* Optionally, one may provide one-time setup code per triangle:
* SETUP_CODE - code which is to be executed once per triangle
- * CLEANUP_CODE - code to execute at end of triangle
*
* The following macro MUST be defined:
* RENDER_SPAN(span) - code to write a span of pixels.
* This code was designed for the origin to be in the lower-left corner.
*
* Inspired by triangle rasterizer code written by Allen Akin. Thanks Allen!
+ *
+ *
+ * Some notes on rasterization accuracy:
+ *
+ * This code uses fixed point arithmetic (the GLfixed type) to iterate
+ * over the triangle edges and interpolate ancillary data (such as Z,
+ * color, secondary color, etc). The number of fractional bits in
+ * GLfixed and the value of SUB_PIXEL_BITS has a direct bearing on the
+ * accuracy of rasterization.
+ *
+ * If SUB_PIXEL_BITS=4 then we'll snap the vertices to the nearest
+ * 1/16 of a pixel. If we're walking up a long, nearly vertical edge
+ * (dx=1/16, dy=1024) we'll need 4 + 10 = 14 fractional bits in
+ * GLfixed to walk the edge without error. If the maximum viewport
+ * height is 4K pixels, then we'll need 4 + 12 = 16 fractional bits.
+ *
+ * Historically, Mesa has used 11 fractional bits in GLfixed, snaps
+ * vertices to 1/16 pixel and allowed a maximum viewport height of 2K
+ * pixels. 11 fractional bits is actually insufficient for accurately
+ * rasterizing some triangles. More recently, the maximum viewport
+ * height was increased to 4K pixels. Thus, Mesa should be using 16
+ * fractional bits in GLfixed. Unfortunately, there may be some issues
+ * with setting FIXED_FRAC_BITS=16, such as multiplication overflow.
+ * This will have to be examined in some detail...
+ *
+ * For now, if you find rasterization errors, particularly with tall,
+ * sliver triangles, try increasing FIXED_FRAC_BITS and/or decreasing
+ * SUB_PIXEL_BITS.
*/
/*
- * This is a bit of a hack, but it's a centralized place to enable floating-
- * point color interpolation when GLchan is actually floating point.
+ * Some code we unfortunately need to prevent negative interpolated colors.
*/
-#if CHAN_TYPE == GL_FLOAT
-
-#if defined(INTERP_RGB)
-#undef INTERP_RGB
-#undef INTERP_ALPHA
-#define INTERP_FLOAT_RGBA
-#endif
-
-#if defined(INTERP_SPEC)
-#undef INTERP_SPEC
-#define INTERP_FLOAT_SPEC
-#endif
-
-#endif
-
-
-/*void triangle( GLcontext *ctx, SWvertex *v0, SWvertex *v1, SWvertex *v2 )*/
+#ifndef CLAMP_INTERPOLANT
+#define CLAMP_INTERPOLANT(CHANNEL, CHANNELSTEP, LEN) \
+do { \
+ GLfixed endVal = span.CHANNEL + (LEN) * span.CHANNELSTEP; \
+ if (endVal < 0) { \
+ span.CHANNEL -= endVal; \
+ } \
+ if (span.CHANNEL < 0) { \
+ span.CHANNEL = 0; \
+ } \
+} while (0)
+#endif
+
+
+static void NAME(GLcontext *ctx, const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
{
typedef struct {
- const SWvertex *v0, *v1; /* Y(v0) < Y(v1) */
- GLfloat dx; /* X(v1) - X(v0) */
- GLfloat dy; /* Y(v1) - Y(v0) */
- GLfixed fdxdy; /* dx/dy in fixed-point */
- GLfixed fsx; /* first sample point x coord */
- GLfixed fsy;
- GLfloat adjy; /* adjust from v[0]->fy to fsy, scaled */
- GLint lines; /* number of lines to be sampled on this edge */
- GLfixed fx0; /* fixed pt X of lower endpoint */
+ const SWvertex *v0, *v1; /* Y(v0) < Y(v1) */
+ 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 */
+ GLfixed fsx; /* first sample point x coord */
+ GLfixed fsy;
+ GLfixed fx0; /* fixed pt X of lower endpoint */
+ GLint lines; /* number of lines to be sampled on this edge */
} EdgeT;
+ const SWcontext *swrast = SWRAST_CONTEXT(ctx);
#ifdef INTERP_Z
- const GLint depthBits = ctx->Visual.depthBits;
+ const GLint depthBits = ctx->DrawBuffer->Visual.depthBits;
const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0;
- const GLfloat maxDepth = ctx->DepthMaxF;
+ const GLfloat maxDepth = ctx->DrawBuffer->_DepthMaxF;
#define FixedToDepth(F) ((F) >> fixedToDepthShift)
#endif
EdgeT eMaj, eTop, eBot;
GLfloat oneOverArea;
const SWvertex *vMin, *vMid, *vMax; /* Y(vMin)<=Y(vMid)<=Y(vMax) */
- float bf = SWRAST_CONTEXT(ctx)->_backface_sign;
- const GLint snapMask = ~((FIXED_ONE / 16) - 1); /* for x/y coord snapping */
+ GLfloat bf = SWRAST_CONTEXT(ctx)->_BackfaceSign;
+ 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;
- struct sw_span span;
+ SWspan span;
+
+ (void) swrast;
- INIT_SPAN(span);
+ INIT_SPAN(span, GL_POLYGON);
+ span.y = 0; /* silence warnings */
#ifdef INTERP_Z
(void) fixedToDepthShift;
/*
printf("%s()\n", __FUNCTION__);
- printf(" %g, %g, %g\n", v0->win[0], v0->win[1], v0->win[2]);
- 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]);
+ printf(" %g, %g, %g\n",
+ v0->attrib[FRAG_ATTRIB_WPOS][0],
+ v0->attrib[FRAG_ATTRIB_WPOS][1],
+ v0->attrib[FRAG_ATTRIB_WPOS][2]);
+ printf(" %g, %g, %g\n",
+ v1->attrib[FRAG_ATTRIB_WPOS][0],
+ v1->attrib[FRAG_ATTRIB_WPOS][1],
+ v1->attrib[FRAG_ATTRIB_WPOS][2]);
+ printf(" %g, %g, %g\n",
+ v2->attrib[FRAG_ATTRIB_WPOS][0],
+ v2->attrib[FRAG_ATTRIB_WPOS][1],
+ v2->attrib[FRAG_ATTRIB_WPOS][2]);
*/
/* Compute fixed point x,y coords w/ half-pixel offsets and snapping.
* And find the order of the 3 vertices along the Y axis.
*/
{
- 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;
-
+ const GLfixed fy0 = FloatToFixed(v0->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask;
+ const GLfixed fy1 = FloatToFixed(v1->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask;
+ const GLfixed fy2 = FloatToFixed(v2->attrib[FRAG_ATTRIB_WPOS][1] - 0.5F) & snapMask;
if (fy0 <= fy1) {
if (fy1 <= fy2) {
/* y0 <= y1 <= y2 */
}
/* fixed point X coords */
- 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;
+ vMin_fx = FloatToFixed(vMin->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask;
+ vMid_fx = FloatToFixed(vMid->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask;
+ vMax_fx = FloatToFixed(vMax->attrib[FRAG_ATTRIB_WPOS][0] + 0.5F) & snapMask;
}
/* vertex/edge relationship */
{
const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
- /* Do backface culling */
- if (area * bf < 0.0)
+ if (IS_INF_OR_NAN(area) || area == 0.0F)
return;
- if (area == 0.0F || IS_INF_OR_NAN(area))
+ if (area * bf * swrast->_BackfaceCullSign < 0.0)
return;
oneOverArea = 1.0F / area;
- }
-#ifndef DO_OCCLUSION_TEST
- ctx->OcclusionResult = GL_TRUE;
-#endif
+ /* 0 = front, 1 = back */
+ span.facing = oneOverArea * bf > 0.0F;
+ }
/* Edge setup. For a triangle strip these could be reused... */
{
eMaj.fsy = FixedCeil(vMin_fy);
eMaj.lines = FixedToInt(FixedCeil(vMax_fy - eMaj.fsy));
if (eMaj.lines > 0) {
- GLfloat dxdy = eMaj.dx / eMaj.dy;
- eMaj.fdxdy = SignedFloatToFixed(dxdy);
+ eMaj.dxdy = eMaj.dx / eMaj.dy;
+ eMaj.fdxdy = SignedFloatToFixed(eMaj.dxdy);
eMaj.adjy = (GLfloat) (eMaj.fsy - vMin_fy); /* SCALED! */
eMaj.fx0 = vMin_fx;
- eMaj.fsx = eMaj.fx0 + (GLfixed) (eMaj.adjy * dxdy);
+ eMaj.fsx = eMaj.fx0 + (GLfixed) (eMaj.adjy * eMaj.dxdy);
}
else {
return; /*CULLED*/
eTop.fsy = FixedCeil(vMid_fy);
eTop.lines = FixedToInt(FixedCeil(vMax_fy - eTop.fsy));
if (eTop.lines > 0) {
- GLfloat dxdy = eTop.dx / eTop.dy;
- eTop.fdxdy = SignedFloatToFixed(dxdy);
+ eTop.dxdy = eTop.dx / eTop.dy;
+ eTop.fdxdy = SignedFloatToFixed(eTop.dxdy);
eTop.adjy = (GLfloat) (eTop.fsy - vMid_fy); /* SCALED! */
eTop.fx0 = vMid_fx;
- eTop.fsx = eTop.fx0 + (GLfixed) (eTop.adjy * dxdy);
+ eTop.fsx = eTop.fx0 + (GLfixed) (eTop.adjy * eTop.dxdy);
}
eBot.fsy = FixedCeil(vMin_fy);
eBot.lines = FixedToInt(FixedCeil(vMid_fy - eBot.fsy));
if (eBot.lines > 0) {
- GLfloat dxdy = eBot.dx / eBot.dy;
- eBot.fdxdy = SignedFloatToFixed(dxdy);
+ eBot.dxdy = eBot.dx / eBot.dy;
+ eBot.fdxdy = SignedFloatToFixed(eBot.dxdy);
eBot.adjy = (GLfloat) (eBot.fsy - vMin_fy); /* SCALED! */
eBot.fx0 = vMin_fx;
- eBot.fsx = eBot.fx0 + (GLfixed) (eBot.adjy * dxdy);
+ eBot.fsx = eBot.fx0 + (GLfixed) (eBot.adjy * eBot.dxdy);
}
}
{
GLint scan_from_left_to_right; /* true if scanning left-to-right */
-#ifdef INTERP_Z
- GLfloat dzdx, dzdy;
-#endif
-#ifdef INTERP_FOG
- GLfloat dfogdy;
-#endif
-#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
- GLfloat drdx, drdy;
- GLfloat dgdx, dgdy;
- GLfloat dbdx, dbdy;
-#endif
-#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
- GLfloat dadx, dady;
-#endif
-#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
- GLfloat dsrdx, dsrdy;
- GLfloat dsgdx, dsgdy;
- GLfloat dsbdx, dsbdy;
-#endif
#ifdef INTERP_INDEX
GLfloat didx, didy;
#endif
-#ifdef INTERP_INT_TEX
- GLfloat dsdx, dsdy;
- GLfloat dtdx, dtdy;
-#endif
-#ifdef INTERP_TEX
- GLfloat dsdx, dsdy;
- GLfloat dtdx, dtdy;
- GLfloat dudx, dudy;
- GLfloat dvdx, dvdy;
-#endif
-#ifdef INTERP_MULTITEX
- GLfloat dsdx[MAX_TEXTURE_UNITS], dsdy[MAX_TEXTURE_UNITS];
- GLfloat dtdx[MAX_TEXTURE_UNITS], dtdy[MAX_TEXTURE_UNITS];
- GLfloat dudx[MAX_TEXTURE_UNITS], dudy[MAX_TEXTURE_UNITS];
- GLfloat dvdx[MAX_TEXTURE_UNITS], dvdy[MAX_TEXTURE_UNITS];
-#endif
/*
* Execute user-supplied setup code
#ifdef INTERP_Z
span.interpMask |= SPAN_Z;
{
- GLfloat eMaj_dz, eBot_dz;
- eMaj_dz = vMax->win[2] - vMin->win[2];
- eBot_dz = vMid->win[2] - vMin->win[2];
- dzdx = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz);
- if (dzdx > maxDepth || dzdx < -maxDepth) {
+ GLfloat eMaj_dz = vMax->attrib[FRAG_ATTRIB_WPOS][2] - vMin->attrib[FRAG_ATTRIB_WPOS][2];
+ GLfloat eBot_dz = vMid->attrib[FRAG_ATTRIB_WPOS][2] - vMin->attrib[FRAG_ATTRIB_WPOS][2];
+ span.attrStepX[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz);
+ if (span.attrStepX[FRAG_ATTRIB_WPOS][2] > maxDepth ||
+ span.attrStepX[FRAG_ATTRIB_WPOS][2] < -maxDepth) {
/* probably a sliver triangle */
- dzdx = 0.0;
- dzdy = 0.0;
+ span.attrStepX[FRAG_ATTRIB_WPOS][2] = 0.0;
+ span.attrStepY[FRAG_ATTRIB_WPOS][2] = 0.0;
}
else {
- dzdy = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
+ span.attrStepY[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
}
if (depthBits <= 16)
- span.zStep = SignedFloatToFixed(dzdx);
+ span.zStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_WPOS][2]);
else
- span.zStep = (GLint) dzdx;
- }
-#endif
-#ifdef INTERP_FOG
- span.interpMask |= SPAN_FOG;
- {
- const GLfloat eMaj_dfog = vMax->fog - vMin->fog;
- const GLfloat eBot_dfog = vMid->fog - vMin->fog;
- span.fogStep = oneOverArea * (eMaj_dfog * eBot.dy - eMaj.dy * eBot_dfog);
- dfogdy = oneOverArea * (eMaj.dx * eBot_dfog - eMaj_dfog * eBot.dx);
+ span.zStep = (GLint) span.attrStepX[FRAG_ATTRIB_WPOS][2];
}
#endif
#ifdef INTERP_RGB
span.interpMask |= SPAN_RGBA;
if (ctx->Light.ShadeModel == GL_SMOOTH) {
- GLfloat eMaj_dr, eBot_dr;
- GLfloat eMaj_dg, eBot_dg;
- GLfloat eMaj_db, eBot_db;
+ GLfloat eMaj_dr = (GLfloat) (vMax->color[RCOMP] - vMin->color[RCOMP]);
+ GLfloat eBot_dr = (GLfloat) (vMid->color[RCOMP] - vMin->color[RCOMP]);
+ GLfloat eMaj_dg = (GLfloat) (vMax->color[GCOMP] - vMin->color[GCOMP]);
+ GLfloat eBot_dg = (GLfloat) (vMid->color[GCOMP] - vMin->color[GCOMP]);
+ GLfloat eMaj_db = (GLfloat) (vMax->color[BCOMP] - vMin->color[BCOMP]);
+ GLfloat eBot_db = (GLfloat) (vMid->color[BCOMP] - vMin->color[BCOMP]);
# ifdef INTERP_ALPHA
- GLfloat eMaj_da, eBot_da;
+ GLfloat eMaj_da = (GLfloat) (vMax->color[ACOMP] - vMin->color[ACOMP]);
+ GLfloat eBot_da = (GLfloat) (vMid->color[ACOMP] - vMin->color[ACOMP]);
# endif
- eMaj_dr = (GLfloat) ((GLint) vMax->color[RCOMP] -
- (GLint) vMin->color[RCOMP]);
- eBot_dr = (GLfloat) ((GLint) vMid->color[RCOMP] -
- (GLint) vMin->color[RCOMP]);
- drdx = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
- span.redStep = SignedFloatToFixed(drdx);
- drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
- eMaj_dg = (GLfloat) ((GLint) vMax->color[GCOMP] -
- (GLint) vMin->color[GCOMP]);
- eBot_dg = (GLfloat) ((GLint) vMid->color[GCOMP] -
- (GLint) vMin->color[GCOMP]);
- dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
- span.greenStep = SignedFloatToFixed(dgdx);
- dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
- eMaj_db = (GLfloat) ((GLint) vMax->color[BCOMP] -
- (GLint) vMin->color[BCOMP]);
- eBot_db = (GLfloat) ((GLint) vMid->color[BCOMP] -
- (GLint) vMin->color[BCOMP]);
- dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
- span.blueStep = SignedFloatToFixed(dbdx);
- dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
+ span.attrStepY[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
+ span.attrStepY[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
+ span.attrStepY[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+ span.redStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][0]);
+ span.greenStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][1]);
+ span.blueStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][2]);
# ifdef INTERP_ALPHA
- eMaj_da = (GLfloat) ((GLint) vMax->color[ACOMP] -
- (GLint) vMin->color[ACOMP]);
- eBot_da = (GLfloat) ((GLint) vMid->color[ACOMP] -
- (GLint) vMin->color[ACOMP]);
- dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
- span.alphaStep = SignedFloatToFixed(dadx);
- dady = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
-# endif
+ span.attrStepX[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
+ span.attrStepY[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+ span.alphaStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][3]);
+# endif /* INTERP_ALPHA */
}
else {
- ASSERT (ctx->Light.ShadeModel == GL_FLAT);
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
span.interpMask |= SPAN_FLAT;
- drdx = drdy = 0.0F;
- dgdx = dgdy = 0.0F;
- dbdx = dbdy = 0.0F;
- span.redStep = 0;
- span.greenStep = 0;
- span.blueStep = 0;
+ span.attrStepX[FRAG_ATTRIB_COL0][0] = span.attrStepY[FRAG_ATTRIB_COL0][0] = 0.0F;
+ span.attrStepX[FRAG_ATTRIB_COL0][1] = span.attrStepY[FRAG_ATTRIB_COL0][1] = 0.0F;
+ span.attrStepX[FRAG_ATTRIB_COL0][2] = span.attrStepY[FRAG_ATTRIB_COL0][2] = 0.0F;
+ span.redStep = 0;
+ span.greenStep = 0;
+ span.blueStep = 0;
# ifdef INTERP_ALPHA
- dadx = dady = 0.0F;
- span.alphaStep = 0;
+ span.attrStepX[FRAG_ATTRIB_COL0][3] = span.attrStepY[FRAG_ATTRIB_COL0][3] = 0.0F;
+ span.alphaStep = 0;
# endif
}
-#endif
-#ifdef INTERP_FLOAT_RGBA
- span.interpMask |= SPAN_RGBA;
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- GLfloat eMaj_dr, eBot_dr;
- GLfloat eMaj_dg, eBot_dg;
- GLfloat eMaj_db, eBot_db;
- GLfloat eMaj_da, eBot_da;
- eMaj_dr = vMax->color[RCOMP] - vMin->color[RCOMP];
- eBot_dr = vMid->color[RCOMP] - vMin->color[RCOMP];
- drdx = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
- span.redStep = drdx;
- drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
- eMaj_dg = vMax->color[GCOMP] - vMin->color[GCOMP];
- eBot_dg = vMid->color[GCOMP] - vMin->color[GCOMP];
- dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
- span.greenStep = dgdx;
- dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
- eMaj_db = vMax->color[BCOMP] - vMin->color[BCOMP];
- eBot_db = vMid->color[BCOMP] - vMin->color[BCOMP];
- dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
- span.blueStep = dbdx;
- dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
- eMaj_da = vMax->color[ACOMP] - vMin->color[ACOMP];
- eBot_da = vMid->color[ACOMP] - vMin->color[ACOMP];
- dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
- span.alphaStep = dadx;
- dady = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
- }
- else {
- drdx = drdy = span.redStep = 0.0F;
- dgdx = dgdy = span.greenStep = 0.0F;
- dbdx = dbdy = span.blueStep = 0.0F;
- dadx = dady = span.alphaStep = 0.0F;
- }
-#endif
-#ifdef INTERP_SPEC
- span.interpMask |= SPAN_SPEC;
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- GLfloat eMaj_dsr, eBot_dsr;
- GLfloat eMaj_dsg, eBot_dsg;
- GLfloat eMaj_dsb, eBot_dsb;
- eMaj_dsr = (GLfloat) ((GLint) vMax->specular[RCOMP] -
- (GLint) vMin->specular[RCOMP]);
- eBot_dsr = (GLfloat) ((GLint) vMid->specular[RCOMP] -
- (GLint) vMin->specular[RCOMP]);
- dsrdx = oneOverArea * (eMaj_dsr * eBot.dy - eMaj.dy * eBot_dsr);
- span.specRedStep = SignedFloatToFixed(dsrdx);
- dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
- eMaj_dsg = (GLfloat) ((GLint) vMax->specular[GCOMP] -
- (GLint) vMin->specular[GCOMP]);
- eBot_dsg = (GLfloat) ((GLint) vMid->specular[GCOMP] -
- (GLint) vMin->specular[GCOMP]);
- dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
- span.specGreenStep = SignedFloatToFixed(dsgdx);
- dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
- eMaj_dsb = (GLfloat) ((GLint) vMax->specular[BCOMP] -
- (GLint) vMin->specular[BCOMP]);
- eBot_dsb = (GLfloat) ((GLint) vMid->specular[BCOMP] -
- (GLint) vMin->specular[BCOMP]);
- dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
- span.specBlueStep = SignedFloatToFixed(dsbdx);
- dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
- }
- else {
- dsrdx = dsrdy = 0.0F;
- dsgdx = dsgdy = 0.0F;
- dsbdx = dsbdy = 0.0F;
- span.specRedStep = 0;
- span.specGreenStep = 0;
- span.specBlueStep = 0;
- }
-#endif
-#ifdef INTERP_FLOAT_SPEC
- span.interpMask |= SPAN_SPEC;
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- GLfloat eMaj_dsr, eBot_dsr;
- GLfloat eMaj_dsg, eBot_dsg;
- GLfloat eMaj_dsb, eBot_dsb;
- eMaj_dsr = vMax->specular[RCOMP] - vMin->specular[RCOMP];
- eBot_dsr = vMid->specular[RCOMP] - vMin->specular[RCOMP];
- dsrdx = oneOverArea * (eMaj_dsr * eBot.dy - eMaj.dy * eBot_dsr);
- span.specRedStep = dsrdx;
- dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
- eMaj_dsg = vMax->specular[GCOMP] - vMin->specular[GCOMP];
- eBot_dsg = vMid->specular[GCOMP] - vMin->specular[GCOMP];
- dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
- span.specGreenStep = dsgdx;
- dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
- eMaj_dsb = vMax->specular[BCOMP] - vMin->specular[BCOMP];
- eBot_dsb = vMid->specular[BCOMP] - vMin->specular[BCOMP];
- dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
- span.specBlueStep = dsbdx;
- dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
- }
- else {
- dsrdx = dsrdy = span.specRedStep = 0;
- dsgdx = dsgdy = span.specGreenStep = 0;
- dsbdx = dsbdy = span.specBlueStep = 0;
- }
-#endif
+#endif /* INTERP_RGB */
#ifdef INTERP_INDEX
span.interpMask |= SPAN_INDEX;
if (ctx->Light.ShadeModel == GL_SMOOTH) {
- GLfloat eMaj_di, eBot_di;
- eMaj_di = (GLfloat) ((GLint) vMax->index - (GLint) vMin->index);
- eBot_di = (GLfloat) ((GLint) vMid->index - (GLint) vMin->index);
+ GLfloat eMaj_di = vMax->attrib[FRAG_ATTRIB_CI][0] - vMin->attrib[FRAG_ATTRIB_CI][0];
+ GLfloat eBot_di = vMid->attrib[FRAG_ATTRIB_CI][0] - vMin->attrib[FRAG_ATTRIB_CI][0];
didx = oneOverArea * (eMaj_di * eBot.dy - eMaj.dy * eBot_di);
- span.indexStep = SignedFloatToFixed(didx);
didy = oneOverArea * (eMaj.dx * eBot_di - eMaj_di * eBot.dx);
+ span.indexStep = SignedFloatToFixed(didx);
}
else {
span.interpMask |= SPAN_FLAT;
}
#endif
#ifdef INTERP_INT_TEX
- span.interpMask |= SPAN_INT_TEXTURE;
{
- GLfloat eMaj_ds, eBot_ds;
- eMaj_ds = (vMax->texcoord[0][0] - vMin->texcoord[0][0]) * S_SCALE;
- eBot_ds = (vMid->texcoord[0][0] - vMin->texcoord[0][0]) * S_SCALE;
- dsdx = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
- span.intTexStep[0] = SignedFloatToFixed(dsdx);
- dsdy = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+ GLfloat eMaj_ds = (vMax->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE;
+ GLfloat eBot_ds = (vMid->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE;
+ GLfloat eMaj_dt = (vMax->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE;
+ GLfloat eBot_dt = (vMid->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE;
+ span.attrStepX[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+ span.attrStepY[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+ span.attrStepX[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+ span.attrStepY[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ span.intTexStep[0] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][0]);
+ span.intTexStep[1] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][1]);
}
- {
- GLfloat eMaj_dt, eBot_dt;
- eMaj_dt = (vMax->texcoord[0][1] - vMin->texcoord[0][1]) * T_SCALE;
- eBot_dt = (vMid->texcoord[0][1] - vMin->texcoord[0][1]) * T_SCALE;
- dtdx = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
- span.intTexStep[1] = SignedFloatToFixed(dtdx);
- dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- }
-
#endif
-#ifdef INTERP_TEX
- span.interpMask |= SPAN_TEXTURE;
+#ifdef INTERP_ATTRIBS
{
- GLfloat wMax = vMax->win[3];
- GLfloat wMin = vMin->win[3];
- GLfloat wMid = vMid->win[3];
- GLfloat eMaj_ds, eBot_ds;
- GLfloat eMaj_dt, eBot_dt;
- GLfloat eMaj_du, eBot_du;
- GLfloat eMaj_dv, eBot_dv;
-
- eMaj_ds = vMax->texcoord[0][0] * wMax - vMin->texcoord[0][0] * wMin;
- eBot_ds = vMid->texcoord[0][0] * wMid - vMin->texcoord[0][0] * wMin;
- dsdx = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
- dsdy = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
- span.texStepX[0][0] = dsdx;
- span.texStepY[0][0] = dsdy;
-
- eMaj_dt = vMax->texcoord[0][1] * wMax - vMin->texcoord[0][1] * wMin;
- eBot_dt = vMid->texcoord[0][1] * wMid - vMin->texcoord[0][1] * wMin;
- dtdx = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
- dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- span.texStepX[0][1] = dtdx;
- span.texStepY[0][1] = dtdy;
-
- eMaj_du = vMax->texcoord[0][2] * wMax - vMin->texcoord[0][2] * wMin;
- eBot_du = vMid->texcoord[0][2] * wMid - vMin->texcoord[0][2] * wMin;
- dudx = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
- dudy = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
- span.texStepX[0][2] = dudx;
- span.texStepY[0][2] = dudy;
-
- eMaj_dv = vMax->texcoord[0][3] * wMax - vMin->texcoord[0][3] * wMin;
- eBot_dv = vMid->texcoord[0][3] * wMid - vMin->texcoord[0][3] * wMin;
- dvdx = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
- dvdy = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
- span.texStepX[0][3] = dvdx;
- span.texStepY[0][3] = dvdy;
- }
-#endif
-#ifdef INTERP_MULTITEX
- span.interpMask |= SPAN_TEXTURE;
- {
- GLfloat wMax = vMax->win[3];
- GLfloat wMin = vMin->win[3];
- GLfloat wMid = vMid->win[3];
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- GLfloat eMaj_ds, eBot_ds;
- GLfloat eMaj_dt, eBot_dt;
- GLfloat eMaj_du, eBot_du;
- GLfloat eMaj_dv, eBot_dv;
- eMaj_ds = vMax->texcoord[u][0] * wMax
- - vMin->texcoord[u][0] * wMin;
- eBot_ds = vMid->texcoord[u][0] * wMid
- - vMin->texcoord[u][0] * wMin;
- dsdx[u] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
- dsdy[u] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
- span.texStepX[u][0] = dsdx[u];
- span.texStepY[u][0] = dsdy[u];
-
- eMaj_dt = vMax->texcoord[u][1] * wMax
- - vMin->texcoord[u][1] * wMin;
- eBot_dt = vMid->texcoord[u][1] * wMid
- - vMin->texcoord[u][1] * wMin;
- dtdx[u] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
- dtdy[u] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- span.texStepX[u][1] = dtdx[u];
- span.texStepY[u][1] = dtdy[u];
-
- eMaj_du = vMax->texcoord[u][2] * wMax
- - vMin->texcoord[u][2] * wMin;
- eBot_du = vMid->texcoord[u][2] * wMid
- - vMin->texcoord[u][2] * wMin;
- dudx[u] = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
- dudy[u] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
- span.texStepX[u][2] = dudx[u];
- span.texStepY[u][2] = dudy[u];
-
- eMaj_dv = vMax->texcoord[u][3] * wMax
- - vMin->texcoord[u][3] * wMin;
- eBot_dv = vMid->texcoord[u][3] * wMid
- - vMin->texcoord[u][3] * wMin;
- dvdx[u] = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
- dvdy[u] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
- span.texStepX[u][3] = dvdx[u];
- span.texStepY[u][3] = dvdy[u];
- }
+ /* attrib[FRAG_ATTRIB_WPOS][3] is 1/W */
+ const GLfloat wMax = vMax->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat wMin = vMin->attrib[FRAG_ATTRIB_WPOS][3];
+ const GLfloat wMid = vMid->attrib[FRAG_ATTRIB_WPOS][3];
+ {
+ const GLfloat eMaj_dw = wMax - wMin;
+ const GLfloat eBot_dw = wMid - wMin;
+ span.attrStepX[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj_dw * eBot.dy - eMaj.dy * eBot_dw);
+ span.attrStepY[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj.dx * eBot_dw - eMaj_dw * eBot.dx);
}
+ ATTRIB_LOOP_BEGIN
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ ASSIGN_4V(span.attrStepX[attr], 0.0, 0.0, 0.0, 0.0);
+ ASSIGN_4V(span.attrStepY[attr], 0.0, 0.0, 0.0, 0.0);
+ }
+ else {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ GLfloat eMaj_da = vMax->attrib[attr][c] * wMax - vMin->attrib[attr][c] * wMin;
+ GLfloat eBot_da = vMid->attrib[attr][c] * wMid - vMin->attrib[attr][c] * wMin;
+ span.attrStepX[attr][c] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
+ span.attrStepY[attr][c] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+ }
+ }
+ ATTRIB_LOOP_END
}
#endif
*/
{
- int subTriangle;
- GLfixed fx;
+ GLint subTriangle;
GLfixed fxLeftEdge = 0, fxRightEdge = 0;
GLfixed fdxLeftEdge = 0, fdxRightEdge = 0;
- GLfixed fdxOuter;
- int idxOuter;
- float dxOuter;
GLfixed fError = 0, fdError = 0;
- float adjx, adjy;
- GLfixed fy;
#ifdef PIXEL_ADDRESS
PIXEL_TYPE *pRow = NULL;
- int dPRowOuter = 0, dPRowInner; /* offset in bytes */
+ GLint dPRowOuter = 0, dPRowInner; /* offset in bytes */
#endif
#ifdef INTERP_Z
# ifdef DEPTH_TYPE
+ struct gl_renderbuffer *zrb
+ = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
DEPTH_TYPE *zRow = NULL;
- int dZRowOuter = 0, dZRowInner; /* offset in bytes */
+ GLint dZRowOuter = 0, dZRowInner; /* offset in bytes */
# endif
- GLfixed fz = 0, fdzOuter = 0, fdzInner;
-#endif
-#ifdef INTERP_FOG
- GLfloat fogLeft = 0, dfogOuter = 0, dfogInner;
+ GLuint zLeft = 0;
+ GLfixed fdzOuter = 0, fdzInner;
#endif
#ifdef INTERP_RGB
- GLfixed fr = 0, fdrOuter = 0, fdrInner;
- GLfixed fg = 0, fdgOuter = 0, fdgInner;
- GLfixed fb = 0, fdbOuter = 0, fdbInner;
+ GLint rLeft = 0, fdrOuter = 0, fdrInner;
+ GLint gLeft = 0, fdgOuter = 0, fdgInner;
+ GLint bLeft = 0, fdbOuter = 0, fdbInner;
#endif
#ifdef INTERP_ALPHA
- GLfixed fa = 0, fdaOuter = 0, fdaInner;
-#endif
-#ifdef INTERP_FLOAT_RGBA
- GLfloat fr, fdrOuter, fdrInner;
- GLfloat fg, fdgOuter, fdgInner;
- GLfloat fb, fdbOuter, fdbInner;
- GLfloat fa, fdaOuter, fdaInner;
-#endif
-#ifdef INTERP_SPEC
- GLfixed fsr=0, fdsrOuter=0, fdsrInner;
- GLfixed fsg=0, fdsgOuter=0, fdsgInner;
- GLfixed fsb=0, fdsbOuter=0, fdsbInner;
-#endif
-#ifdef INTERP_FLOAT_SPEC
- GLfloat fsr=0, fdsrOuter=0, fdsrInner;
- GLfloat fsg=0, fdsgOuter=0, fdsgInner;
- GLfloat fsb=0, fdsbOuter=0, fdsbInner;
+ GLint aLeft = 0, fdaOuter = 0, fdaInner;
#endif
#ifdef INTERP_INDEX
- GLfixed fi=0, fdiOuter=0, fdiInner;
+ GLfixed iLeft=0, diOuter=0, diInner;
#endif
#ifdef INTERP_INT_TEX
- GLfixed fs=0, fdsOuter=0, fdsInner;
- GLfixed ft=0, fdtOuter=0, fdtInner;
-#endif
-#ifdef INTERP_TEX
- GLfloat sLeft=0, dsOuter=0, dsInner;
- GLfloat tLeft=0, dtOuter=0, dtInner;
- GLfloat uLeft=0, duOuter=0, duInner;
- GLfloat vLeft=0, dvOuter=0, dvInner;
+ GLfixed sLeft=0, dsOuter=0, dsInner;
+ GLfixed tLeft=0, dtOuter=0, dtInner;
#endif
-#ifdef INTERP_MULTITEX
- GLfloat sLeft[MAX_TEXTURE_UNITS];
- GLfloat tLeft[MAX_TEXTURE_UNITS];
- GLfloat uLeft[MAX_TEXTURE_UNITS];
- GLfloat vLeft[MAX_TEXTURE_UNITS];
- GLfloat dsOuter[MAX_TEXTURE_UNITS], dsInner[MAX_TEXTURE_UNITS];
- GLfloat dtOuter[MAX_TEXTURE_UNITS], dtInner[MAX_TEXTURE_UNITS];
- GLfloat duOuter[MAX_TEXTURE_UNITS], duInner[MAX_TEXTURE_UNITS];
- GLfloat dvOuter[MAX_TEXTURE_UNITS], dvInner[MAX_TEXTURE_UNITS];
+#ifdef INTERP_ATTRIBS
+ GLfloat wLeft = 0, dwOuter = 0, dwInner;
+ GLfloat attrLeft[FRAG_ATTRIB_MAX][4];
+ GLfloat daOuter[FRAG_ATTRIB_MAX][4], daInner[FRAG_ATTRIB_MAX][4];
#endif
for (subTriangle=0; subTriangle<=1; subTriangle++) {
}
if (setupLeft && eLeft->lines > 0) {
- const SWvertex *vLower;
- GLfixed fsx = eLeft->fsx;
- fx = FixedCeil(fsx);
+ const SWvertex *vLower = eLeft->v0;
+ const GLfixed fsy = eLeft->fsy;
+ const GLfixed fsx = eLeft->fsx; /* no fractional part */
+ const GLfixed fx = FixedCeil(fsx); /* no fractional part */
+ const GLfixed adjx = (GLfixed) (fx - eLeft->fx0); /* SCALED! */
+ const GLfixed adjy = (GLfixed) eLeft->adjy; /* SCALED! */
+ GLint idxOuter;
+ GLfloat dxOuter;
+ GLfixed fdxOuter;
+
fError = fx - fsx - FIXED_ONE;
fxLeftEdge = fsx - FIXED_EPSILON;
fdxLeftEdge = eLeft->fdxdy;
fdxOuter = FixedFloor(fdxLeftEdge - FIXED_EPSILON);
fdError = fdxOuter - fdxLeftEdge + FIXED_ONE;
idxOuter = FixedToInt(fdxOuter);
- dxOuter = (float) idxOuter;
- (void) dxOuter;
-
- fy = eLeft->fsy;
- span.y = FixedToInt(fy);
+ dxOuter = (GLfloat) idxOuter;
+ span.y = FixedToInt(fsy);
- adjx = (float)(fx - eLeft->fx0); /* SCALED! */
- adjy = eLeft->adjy; /* SCALED! */
- (void) adjx; /* silence compiler warnings */
- (void) adjy; /* silence compiler warnings */
-
- vLower = eLeft->v0;
- (void) vLower; /* silence compiler warnings */
+ /* silence warnings on some compilers */
+ (void) dxOuter;
+ (void) adjx;
+ (void) adjy;
+ (void) vLower;
#ifdef PIXEL_ADDRESS
{
#endif
/*
* Now we need the set of parameter (z, color, etc.) values at
- * the point (fx, fy). This gives us properly-sampled parameter
+ * the point (fx, fsy). This gives us properly-sampled parameter
* values that we can step from pixel to pixel. Furthermore,
* although we might have intermediate results that overflow
* the normal parameter range when we step temporarily outside
#ifdef INTERP_Z
{
- GLfloat z0 = vLower->win[2];
+ GLfloat z0 = vLower->attrib[FRAG_ATTRIB_WPOS][2];
if (depthBits <= 16) {
/* interpolate fixed-pt values */
- GLfloat tmp = (z0 * FIXED_SCALE +
- dzdx * adjx + dzdy * adjy) + FIXED_HALF;
+ GLfloat tmp = (z0 * FIXED_SCALE
+ + span.attrStepX[FRAG_ATTRIB_WPOS][2] * adjx
+ + span.attrStepY[FRAG_ATTRIB_WPOS][2] * adjy) + FIXED_HALF;
if (tmp < MAX_GLUINT / 2)
- fz = (GLfixed) tmp;
+ zLeft = (GLfixed) tmp;
else
- fz = MAX_GLUINT / 2;
- fdzOuter = SignedFloatToFixed(dzdy + dxOuter * dzdx);
+ zLeft = MAX_GLUINT / 2;
+ fdzOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_WPOS][2] +
+ dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]);
}
else {
- /* interpolate depth values exactly */
- fz = (GLint) (z0 + dzdx * FixedToFloat(adjx)
- + dzdy * FixedToFloat(adjy));
- fdzOuter = (GLint) (dzdy + dxOuter * dzdx);
+ /* interpolate depth values w/out scaling */
+ zLeft = (GLuint) (z0 + span.attrStepX[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjx)
+ + span.attrStepY[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjy));
+ fdzOuter = (GLint) (span.attrStepY[FRAG_ATTRIB_WPOS][2] +
+ dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]);
}
# ifdef DEPTH_TYPE
zRow = (DEPTH_TYPE *)
- _mesa_zbuffer_address(ctx, FixedToInt(fxLeftEdge), span.y);
+ zrb->GetPointer(ctx, zrb, FixedToInt(fxLeftEdge), span.y);
dZRowOuter = (ctx->DrawBuffer->Width + idxOuter) * sizeof(DEPTH_TYPE);
# endif
}
#endif
-#ifdef INTERP_FOG
- fogLeft = vLower->fog + (span.fogStep * adjx + dfogdy * adjy)
- * (1.0F/FIXED_SCALE);
- dfogOuter = dfogdy + dxOuter * span.fogStep;
-#endif
#ifdef INTERP_RGB
if (ctx->Light.ShadeModel == GL_SMOOTH) {
- fr = (GLfixed) (ChanToFixed(vLower->color[RCOMP])
- + drdx * adjx + drdy * adjy) + FIXED_HALF;
- fdrOuter = SignedFloatToFixed(drdy + dxOuter * drdx);
- fg = (GLfixed) (ChanToFixed(vLower->color[GCOMP])
- + dgdx * adjx + dgdy * adjy) + FIXED_HALF;
- fdgOuter = SignedFloatToFixed(dgdy + dxOuter * dgdx);
- fb = (GLfixed) (ChanToFixed(vLower->color[BCOMP])
- + dbdx * adjx + dbdy * adjy) + FIXED_HALF;
- fdbOuter = SignedFloatToFixed(dbdy + dxOuter * dbdx);
+ rLeft = (GLint)(ChanToFixed(vLower->color[RCOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][0] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][0] * adjy) + FIXED_HALF;
+ gLeft = (GLint)(ChanToFixed(vLower->color[GCOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][1] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][1] * adjy) + FIXED_HALF;
+ bLeft = (GLint)(ChanToFixed(vLower->color[BCOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][2] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][2] * adjy) + FIXED_HALF;
+ fdrOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][0]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][0]);
+ fdgOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][1]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][1]);
+ fdbOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][2]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][2]);
# ifdef INTERP_ALPHA
- fa = (GLfixed) (ChanToFixed(vLower->color[ACOMP])
- + dadx * adjx + dady * adjy) + FIXED_HALF;
- fdaOuter = SignedFloatToFixed(dady + dxOuter * dadx);
+ aLeft = (GLint)(ChanToFixed(vLower->color[ACOMP])
+ + span.attrStepX[FRAG_ATTRIB_COL0][3] * adjx
+ + span.attrStepY[FRAG_ATTRIB_COL0][3] * adjy) + FIXED_HALF;
+ fdaOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][3]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][3]);
# endif
}
else {
- ASSERT (ctx->Light.ShadeModel == GL_FLAT);
- fr = ChanToFixed(v2->color[RCOMP]);
- fg = ChanToFixed(v2->color[GCOMP]);
- fb = ChanToFixed(v2->color[BCOMP]);
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+ rLeft = ChanToFixed(v2->color[RCOMP]);
+ gLeft = ChanToFixed(v2->color[GCOMP]);
+ bLeft = ChanToFixed(v2->color[BCOMP]);
fdrOuter = fdgOuter = fdbOuter = 0;
# ifdef INTERP_ALPHA
- fa = ChanToFixed(v2->color[ACOMP]);
+ aLeft = ChanToFixed(v2->color[ACOMP]);
fdaOuter = 0;
# endif
}
-#endif
-#ifdef INTERP_FLOAT_RGBA
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- fr = vLower->color[RCOMP]
- + (drdx * adjx + drdy * adjy) * (1.0F / FIXED_SCALE);
- fdrOuter = drdy + dxOuter * drdx;
- fg = vLower->color[GCOMP]
- + (dgdx * adjx + dgdy * adjy) * (1.0F / FIXED_SCALE);
- fdgOuter = dgdy + dxOuter * dgdx;
- fb = vLower->color[BCOMP]
- + (dbdx * adjx + dbdy * adjy) * (1.0F / FIXED_SCALE);
- fdbOuter = dbdy + dxOuter * dbdx;
- fa = vLower->color[ACOMP]
- + (dadx * adjx + dady * adjy) * (1.0F / FIXED_SCALE);
- fdaOuter = dady + dxOuter * dadx;
- }
- else {
- fr = v2->color[RCOMP];
- fg = v2->color[GCOMP];
- fb = v2->color[BCOMP];
- fa = v2->color[ACOMP];
- fdrOuter = fdgOuter = fdbOuter = fdaOuter = 0.0F;
- }
-#endif
-#ifdef INTERP_SPEC
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- fsr = (GLfixed) (ChanToFixed(vLower->specular[RCOMP])
- + dsrdx * adjx + dsrdy * adjy) + FIXED_HALF;
- fdsrOuter = SignedFloatToFixed(dsrdy + dxOuter * dsrdx);
- fsg = (GLfixed) (ChanToFixed(vLower->specular[GCOMP])
- + dsgdx * adjx + dsgdy * adjy) + FIXED_HALF;
- fdsgOuter = SignedFloatToFixed(dsgdy + dxOuter * dsgdx);
- fsb = (GLfixed) (ChanToFixed(vLower->specular[BCOMP])
- + dsbdx * adjx + dsbdy * adjy) + FIXED_HALF;
- fdsbOuter = SignedFloatToFixed(dsbdy + dxOuter * dsbdx);
- }
- else {
- fsr = ChanToFixed(v2->specular[RCOMP]);
- fsg = ChanToFixed(v2->specular[GCOMP]);
- fsb = ChanToFixed(v2->specular[BCOMP]);
- fdsrOuter = fdsgOuter = fdsbOuter = 0;
- }
-#endif
-#ifdef INTERP_FLOAT_SPEC
- if (ctx->Light.ShadeModel == GL_SMOOTH) {
- fsr = vLower->specular[RCOMP]
- + (dsrdx * adjx + dsrdy * adjy) * (1.0F / FIXED_SCALE);
- fdsrOuter = dsrdy + dxOuter * dsrdx;
- fsg = vLower->specular[GCOMP]
- + (dsgdx * adjx + dsgdy * adjy) * (1.0F / FIXED_SCALE);
- fdsgOuter = dsgdy + dxOuter * dsgdx;
- fsb = vLower->specular[BCOMP]
- + (dsbdx * adjx + dsbdy * adjy) * (1.0F / FIXED_SCALE);
- fdsbOuter = dsbdy + dxOuter * dsbdx;
- }
- else {
- fsr = v2->specular[RCOMP];
- fsg = v2->specular[GCOMP];
- fsb = v2->specular[BCOMP];
- fdsrOuter = fdsgOuter = fdsbOuter = 0.0F;
- }
-#endif
+#endif /* INTERP_RGB */
+
+
#ifdef INTERP_INDEX
if (ctx->Light.ShadeModel == GL_SMOOTH) {
- fi = (GLfixed)(vLower->index * FIXED_SCALE
+ iLeft = (GLfixed)(vLower->attrib[FRAG_ATTRIB_CI][0] * FIXED_SCALE
+ didx * adjx + didy * adjy) + FIXED_HALF;
- fdiOuter = SignedFloatToFixed(didy + dxOuter * didx);
+ diOuter = SignedFloatToFixed(didy + dxOuter * didx);
}
else {
- fi = (GLfixed) (v2->index * FIXED_SCALE);
- fdiOuter = 0;
+ ASSERT(ctx->Light.ShadeModel == GL_FLAT);
+ iLeft = FloatToFixed(v2->attrib[FRAG_ATTRIB_CI][0]);
+ diOuter = 0;
}
#endif
#ifdef INTERP_INT_TEX
{
GLfloat s0, t0;
- s0 = vLower->texcoord[0][0] * S_SCALE;
- fs = (GLfixed)(s0 * FIXED_SCALE + dsdx * adjx
- + dsdy * adjy) + FIXED_HALF;
- fdsOuter = SignedFloatToFixed(dsdy + dxOuter * dsdx);
-
- t0 = vLower->texcoord[0][1] * T_SCALE;
- ft = (GLfixed)(t0 * FIXED_SCALE + dtdx * adjx
- + dtdy * adjy) + FIXED_HALF;
- fdtOuter = SignedFloatToFixed(dtdy + dxOuter * dtdx);
+ s0 = vLower->attrib[FRAG_ATTRIB_TEX0][0] * S_SCALE;
+ sLeft = (GLfixed)(s0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][0] * adjx
+ + span.attrStepY[FRAG_ATTRIB_TEX0][0] * adjy) + FIXED_HALF;
+ dsOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][0]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][0]);
+
+ t0 = vLower->attrib[FRAG_ATTRIB_TEX0][1] * T_SCALE;
+ tLeft = (GLfixed)(t0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][1] * adjx
+ + span.attrStepY[FRAG_ATTRIB_TEX0][1] * adjy) + FIXED_HALF;
+ dtOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][1]
+ + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][1]);
}
#endif
-#ifdef INTERP_TEX
+#ifdef INTERP_ATTRIBS
{
- GLfloat invW = vLower->win[3];
- GLfloat s0, t0, u0, v0;
- s0 = vLower->texcoord[0][0] * invW;
- sLeft = s0 + (span.texStepX[0][0] * adjx + dsdy * adjy)
- * (1.0F/FIXED_SCALE);
- dsOuter = dsdy + dxOuter * span.texStepX[0][0];
- t0 = vLower->texcoord[0][1] * invW;
- tLeft = t0 + (span.texStepX[0][1] * adjx + dtdy * adjy)
- * (1.0F/FIXED_SCALE);
- dtOuter = dtdy + dxOuter * span.texStepX[0][1];
- u0 = vLower->texcoord[0][2] * invW;
- uLeft = u0 + (span.texStepX[0][2] * adjx + dudy * adjy)
- * (1.0F/FIXED_SCALE);
- duOuter = dudy + dxOuter * span.texStepX[0][2];
- v0 = vLower->texcoord[0][3] * invW;
- vLeft = v0 + (span.texStepX[0][3] * adjx + dvdy * adjy)
- * (1.0F/FIXED_SCALE);
- dvOuter = dvdy + dxOuter * span.texStepX[0][3];
+ const GLuint attr = FRAG_ATTRIB_WPOS;
+ wLeft = vLower->attrib[FRAG_ATTRIB_WPOS][3]
+ + (span.attrStepX[attr][3] * adjx
+ + span.attrStepY[attr][3] * adjy) * (1.0F/FIXED_SCALE);
+ dwOuter = span.attrStepY[attr][3] + dxOuter * span.attrStepX[attr][3];
}
-#endif
-#ifdef INTERP_MULTITEX
- {
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- GLfloat invW = vLower->win[3];
- GLfloat s0, t0, u0, v0;
- s0 = vLower->texcoord[u][0] * invW;
- sLeft[u] = s0 + (span.texStepX[u][0] * adjx + dsdy[u]
- * adjy) * (1.0F/FIXED_SCALE);
- dsOuter[u] = dsdy[u] + dxOuter * span.texStepX[u][0];
- t0 = vLower->texcoord[u][1] * invW;
- tLeft[u] = t0 + (span.texStepX[u][1] * adjx + dtdy[u]
- * adjy) * (1.0F/FIXED_SCALE);
- dtOuter[u] = dtdy[u] + dxOuter * span.texStepX[u][1];
- u0 = vLower->texcoord[u][2] * invW;
- uLeft[u] = u0 + (span.texStepX[u][2] * adjx + dudy[u]
- * adjy) * (1.0F/FIXED_SCALE);
- duOuter[u] = dudy[u] + dxOuter * span.texStepX[u][2];
- v0 = vLower->texcoord[u][3] * invW;
- vLeft[u] = v0 + (span.texStepX[u][3] * adjx + dvdy[u]
- * adjy) * (1.0F/FIXED_SCALE);
- dvOuter[u] = dvdy[u] + dxOuter * span.texStepX[u][3];
+ ATTRIB_LOOP_BEGIN
+ const GLfloat invW = vLower->attrib[FRAG_ATTRIB_WPOS][3];
+ if (swrast->_InterpMode[attr] == GL_FLAT) {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attrLeft[attr][c] = v2->attrib[attr][c] * invW;
+ daOuter[attr][c] = 0.0;
}
}
- }
+ else {
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ const GLfloat a = vLower->attrib[attr][c] * invW;
+ attrLeft[attr][c] = a + ( span.attrStepX[attr][c] * adjx
+ + span.attrStepY[attr][c] * adjy) * (1.0F/FIXED_SCALE);
+ daOuter[attr][c] = span.attrStepY[attr][c] + dxOuter * span.attrStepX[attr][c];
+ }
+ }
+ ATTRIB_LOOP_END
#endif
-
} /*if setupLeft*/
# endif
fdzInner = fdzOuter + span.zStep;
#endif
-#ifdef INTERP_FOG
- dfogInner = dfogOuter + span.fogStep;
-#endif
-#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
+#ifdef INTERP_RGB
fdrInner = fdrOuter + span.redStep;
fdgInner = fdgOuter + span.greenStep;
fdbInner = fdbOuter + span.blueStep;
#endif
-#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
+#ifdef INTERP_ALPHA
fdaInner = fdaOuter + span.alphaStep;
#endif
-#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
- fdsrInner = fdsrOuter + span.specRedStep;
- fdsgInner = fdsgOuter + span.specGreenStep;
- fdsbInner = fdsbOuter + span.specBlueStep;
-#endif
#ifdef INTERP_INDEX
- fdiInner = fdiOuter + span.indexStep;
+ diInner = diOuter + span.indexStep;
#endif
#ifdef INTERP_INT_TEX
- fdsInner = fdsOuter + span.intTexStep[0];
- fdtInner = fdtOuter + span.intTexStep[1];
-#endif
-#ifdef INTERP_TEX
- dsInner = dsOuter + span.texStepX[0][0];
- dtInner = dtOuter + span.texStepX[0][1];
- duInner = duOuter + span.texStepX[0][2];
- dvInner = dvOuter + span.texStepX[0][3];
-#endif
-#ifdef INTERP_MULTITEX
- {
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- dsInner[u] = dsOuter[u] + span.texStepX[u][0];
- dtInner[u] = dtOuter[u] + span.texStepX[u][1];
- duInner[u] = duOuter[u] + span.texStepX[u][2];
- dvInner[u] = dvOuter[u] + span.texStepX[u][3];
- }
+ dsInner = dsOuter + span.intTexStep[0];
+ dtInner = dtOuter + span.intTexStep[1];
+#endif
+#ifdef INTERP_ATTRIBS
+ dwInner = dwOuter + span.attrStepX[FRAG_ATTRIB_WPOS][3];
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ daInner[attr][c] = daOuter[attr][c] + span.attrStepX[attr][c];
}
- }
+ ATTRIB_LOOP_END
#endif
while (lines > 0) {
/* initialize the span interpolants to the leftmost value */
/* ff = fixed-pt fragment */
const GLint right = FixedToInt(fxRightEdge);
-
span.x = FixedToInt(fxLeftEdge);
-
if (right <= span.x)
span.end = 0;
else
span.end = right - span.x;
#ifdef INTERP_Z
- span.z = fz;
+ span.z = zLeft;
#endif
-#ifdef INTERP_FOG
- span.fog = fogLeft;
-#endif
-#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
- span.red = fr;
- span.green = fg;
- span.blue = fb;
-#endif
-#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
- span.alpha = fa;
+#ifdef INTERP_RGB
+ span.red = rLeft;
+ span.green = gLeft;
+ span.blue = bLeft;
#endif
-#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
- span.specRed = fsr;
- span.specGreen = fsg;
- span.specBlue = fsb;
+#ifdef INTERP_ALPHA
+ span.alpha = aLeft;
#endif
#ifdef INTERP_INDEX
- span.index = fi;
+ span.index = iLeft;
#endif
#ifdef INTERP_INT_TEX
- span.intTex[0] = fs;
- span.intTex[1] = ft;
+ span.intTex[0] = sLeft;
+ span.intTex[1] = tLeft;
#endif
-#ifdef INTERP_TEX
- span.tex[0][0] = sLeft;
- span.tex[0][1] = tLeft;
- span.tex[0][2] = uLeft;
- span.tex[0][3] = vLeft;
-#endif
-
-#ifdef INTERP_MULTITEX
- {
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- span.tex[u][0] = sLeft[u];
- span.tex[u][1] = tLeft[u];
- span.tex[u][2] = uLeft[u];
- span.tex[u][3] = vLeft[u];
- }
+#ifdef INTERP_ATTRIBS
+ span.attrStart[FRAG_ATTRIB_WPOS][3] = wLeft;
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ span.attrStart[attr][c] = attrLeft[attr][c];
}
- }
+ ATTRIB_LOOP_END
#endif
+ /* This is where we actually generate fragments */
+ /* XXX the test for span.y > 0 _shouldn't_ be needed but
+ * it fixes a problem on 64-bit Opterons (bug 4842).
+ */
+ if (span.end > 0 && span.y >= 0) {
+ 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;
- }
- }
+ CLAMP_INTERPOLANT(red, redStep, len);
+ CLAMP_INTERPOLANT(green, greenStep, len);
+ CLAMP_INTERPOLANT(blue, blueStep, len);
#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;
- }
- }
-#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;
- }
- if (ffsbend < 0) {
- span.specBlue -= ffsbend;
- if (span.specBlue < 0)
- span.specBlue = 0;
- }
- }
+ CLAMP_INTERPOLANT(alpha, alphaStep, len);
#endif
#ifdef INTERP_INDEX
- if (span.index < 0) span.index = 0;
+ CLAMP_INTERPOLANT(index, indexStep, len);
#endif
-
- /* This is where we actually generate fragments */
- if (span.end > 0) {
- RENDER_SPAN( span );
+ {
+ RENDER_SPAN( span );
+ }
}
/*
fxLeftEdge += fdxLeftEdge;
fxRightEdge += fdxRightEdge;
-
fError += fdError;
if (fError >= 0) {
fError -= FIXED_ONE;
+
#ifdef PIXEL_ADDRESS
pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowOuter);
#endif
# ifdef DEPTH_TYPE
zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowOuter);
# endif
- fz += fdzOuter;
+ zLeft += fdzOuter;
#endif
-#ifdef INTERP_FOG
- fogLeft += dfogOuter;
-#endif
-#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
- fr += fdrOuter;
- fg += fdgOuter;
- fb += fdbOuter;
-#endif
-#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
- fa += fdaOuter;
+#ifdef INTERP_RGB
+ rLeft += fdrOuter;
+ gLeft += fdgOuter;
+ bLeft += fdbOuter;
#endif
-#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
- fsr += fdsrOuter;
- fsg += fdsgOuter;
- fsb += fdsbOuter;
+#ifdef INTERP_ALPHA
+ aLeft += fdaOuter;
#endif
#ifdef INTERP_INDEX
- fi += fdiOuter;
+ iLeft += diOuter;
#endif
#ifdef INTERP_INT_TEX
- fs += fdsOuter;
- ft += fdtOuter;
-#endif
-#ifdef INTERP_TEX
sLeft += dsOuter;
tLeft += dtOuter;
- uLeft += duOuter;
- vLeft += dvOuter;
#endif
-#ifdef INTERP_MULTITEX
- {
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- sLeft[u] += dsOuter[u];
- tLeft[u] += dtOuter[u];
- uLeft[u] += duOuter[u];
- vLeft[u] += dvOuter[u];
- }
+#ifdef INTERP_ATTRIBS
+ wLeft += dwOuter;
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attrLeft[attr][c] += daOuter[attr][c];
}
- }
+ ATTRIB_LOOP_END
#endif
}
else {
# ifdef DEPTH_TYPE
zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowInner);
# endif
- fz += fdzInner;
-#endif
-#ifdef INTERP_FOG
- fogLeft += dfogInner;
+ zLeft += fdzInner;
#endif
-#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
- fr += fdrInner;
- fg += fdgInner;
- fb += fdbInner;
-#endif
-#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
- fa += fdaInner;
+#ifdef INTERP_RGB
+ rLeft += fdrInner;
+ gLeft += fdgInner;
+ bLeft += fdbInner;
#endif
-#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
- fsr += fdsrInner;
- fsg += fdsgInner;
- fsb += fdsbInner;
+#ifdef INTERP_ALPHA
+ aLeft += fdaInner;
#endif
#ifdef INTERP_INDEX
- fi += fdiInner;
+ iLeft += diInner;
#endif
#ifdef INTERP_INT_TEX
- fs += fdsInner;
- ft += fdtInner;
-#endif
-#ifdef INTERP_TEX
sLeft += dsInner;
tLeft += dtInner;
- uLeft += duInner;
- vLeft += dvInner;
#endif
-#ifdef INTERP_MULTITEX
- {
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- sLeft[u] += dsInner[u];
- tLeft[u] += dtInner[u];
- uLeft[u] += duInner[u];
- vLeft[u] += dvInner[u];
- }
+#ifdef INTERP_ATTRIBS
+ wLeft += dwInner;
+ ATTRIB_LOOP_BEGIN
+ GLuint c;
+ for (c = 0; c < 4; c++) {
+ attrLeft[attr][c] += daInner[attr][c];
}
- }
+ ATTRIB_LOOP_END
#endif
}
} /*while lines>0*/
} /* for subTriangle */
}
-#ifdef CLEANUP_CODE
- CLEANUP_CODE
-#endif
}
}
#undef SETUP_CODE
-#undef CLEANUP_CODE
#undef RENDER_SPAN
#undef PIXEL_TYPE
#undef BYTES_PER_ROW
#undef PIXEL_ADDRESS
+#undef DEPTH_TYPE
#undef INTERP_Z
-#undef INTERP_FOG
#undef INTERP_RGB
#undef INTERP_ALPHA
-#undef INTERP_SPEC
#undef INTERP_INDEX
#undef INTERP_INT_TEX
-#undef INTERP_TEX
-#undef INTERP_MULTITEX
-#undef INTERP_FLOAT_RGBA
-#undef INTERP_FLOAT_SPEC
+#undef INTERP_ATTRIBS
#undef S_SCALE
#undef T_SCALE
#undef FixedToDepth
-#undef DO_OCCLUSION_TEST
+#undef NAME
projects / mesa.git / blobdiff