-/* $Id: s_tritemp.h,v 1.1 2000/10/31 18:00:04 keithw Exp $ */
+/* $Id: s_tritemp.h,v 1.43 2003/01/20 00:24:22 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* 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
* 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
- * INTERP_ALPHA - if defined, interpolate 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
*
* When one can directly address pixels in the color buffer the following
* macros can be defined and used to compute pixel addresses during
*
* Optionally, one may provide one-time setup code per triangle:
* SETUP_CODE - code which is to be executed once per triangle
- *
- * The following macro MUST be defined:
- * INNER_LOOP(LEFT,RIGHT,Y) - code to write a span of pixels.
- * Something like:
+ * CLEANUP_CODE - code to execute at end of triangle
*
- * for (x=LEFT; x<RIGHT;x++) {
- * put_pixel(x,Y);
- * // increment fixed point interpolants
- * }
+ * 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.
*
*/
-/*void triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv )*/
+/*
+ * 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.
+ */
+#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 /* CHAN_TYPE == GL_FLOAT */
+
+
+
+static void NAME(GLcontext *ctx, const SWvertex *v0,
+ const SWvertex *v1,
+ const SWvertex *v2 )
{
typedef struct {
- GLint 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) */
+ 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 */
} EdgeT;
#ifdef INTERP_Z
- const GLint depthBits = ctx->Visual.DepthBits;
+ const GLint depthBits = ctx->Visual.depthBits;
const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0;
- const GLfloat maxDepth = ctx->Visual.DepthMaxF;
+ const GLfloat maxDepth = ctx->DepthMaxF;
#define FixedToDepth(F) ((F) >> fixedToDepthShift)
#endif
- const struct vertex_buffer *VB = ctx->VB;
EdgeT eMaj, eTop, eBot;
GLfloat oneOverArea;
- int vMin, vMid, vMax; /* vertex indexes: Y(vMin)<=Y(vMid)<=Y(vMax) */
- float bf = ctx->backface_sign;
+ const SWvertex *vMin, *vMid, *vMax; /* Y(vMin)<=Y(vMid)<=Y(vMax) */
+ float bf = SWRAST_CONTEXT(ctx)->_backface_sign;
+ 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;
- /* find the order of the 3 vertices along the Y axis */
+ struct sw_span span;
+
+ INIT_SPAN(span, GL_POLYGON, 0, 0, 0);
+
+#ifdef INTERP_Z
+ (void) fixedToDepthShift;
+#endif
+
+ /*
+ 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]);
+ */
+
+ /* Compute fixed point x,y coords w/ half-pixel offsets and snapping.
+ * And find the order of the 3 vertices along the Y axis.
+ */
{
- GLfloat y0 = VB->Win.data[v0][1];
- GLfloat y1 = VB->Win.data[v1][1];
- GLfloat y2 = VB->Win.data[v2][1];
-
- if (y0<=y1) {
- if (y1<=y2) {
- vMin = v0; vMid = v1; vMax = v2; /* y0<=y1<=y2 */
- }
- else if (y2<=y0) {
- vMin = v2; vMid = v0; vMax = v1; /* y2<=y0<=y1 */
- }
- else {
- vMin = v0; vMid = v2; vMax = v1; bf = -bf; /* y0<=y2<=y1 */
- }
+ 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;
+
+ if (fy0 <= fy1) {
+ if (fy1 <= fy2) {
+ /* y0 <= y1 <= y2 */
+ vMin = v0; vMid = v1; vMax = v2;
+ vMin_fy = fy0; vMid_fy = fy1; vMax_fy = fy2;
+ }
+ else if (fy2 <= fy0) {
+ /* y2 <= y0 <= y1 */
+ vMin = v2; vMid = v0; vMax = v1;
+ vMin_fy = fy2; vMid_fy = fy0; vMax_fy = fy1;
+ }
+ else {
+ /* y0 <= y2 <= y1 */
+ vMin = v0; vMid = v2; vMax = v1;
+ vMin_fy = fy0; vMid_fy = fy2; vMax_fy = fy1;
+ bf = -bf;
+ }
}
else {
- if (y0<=y2) {
- vMin = v1; vMid = v0; vMax = v2; bf = -bf; /* y1<=y0<=y2 */
- }
- else if (y2<=y1) {
- vMin = v2; vMid = v1; vMax = v0; bf = -bf; /* y2<=y1<=y0 */
- }
- else {
- vMin = v1; vMid = v2; vMax = v0; /* y1<=y2<=y0 */
- }
+ if (fy0 <= fy2) {
+ /* y1 <= y0 <= y2 */
+ vMin = v1; vMid = v0; vMax = v2;
+ vMin_fy = fy1; vMid_fy = fy0; vMax_fy = fy2;
+ bf = -bf;
+ }
+ else if (fy2 <= fy1) {
+ /* y2 <= y1 <= y0 */
+ vMin = v2; vMid = v1; vMax = v0;
+ vMin_fy = fy2; vMid_fy = fy1; vMax_fy = fy0;
+ bf = -bf;
+ }
+ else {
+ /* y1 <= y2 <= y0 */
+ vMin = v1; vMid = v2; vMax = v0;
+ vMin_fy = fy1; vMid_fy = fy2; vMax_fy = fy0;
+ }
}
+
+ /* 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;
}
/* vertex/edge relationship */
eTop.v0 = vMid; eTop.v1 = vMax;
eBot.v0 = vMin; eBot.v1 = vMid;
- /* compute deltas for each edge: vertex[v1] - vertex[v0] */
- eMaj.dx = VB->Win.data[vMax][0] - VB->Win.data[vMin][0];
- eMaj.dy = VB->Win.data[vMax][1] - VB->Win.data[vMin][1];
- eTop.dx = VB->Win.data[vMax][0] - VB->Win.data[vMid][0];
- eTop.dy = VB->Win.data[vMax][1] - VB->Win.data[vMid][1];
- eBot.dx = VB->Win.data[vMid][0] - VB->Win.data[vMin][0];
- eBot.dy = VB->Win.data[vMid][1] - VB->Win.data[vMin][1];
+ /* compute deltas for each edge: vertex[upper] - vertex[lower] */
+ eMaj.dx = FixedToFloat(vMax_fx - vMin_fx);
+ eMaj.dy = FixedToFloat(vMax_fy - vMin_fy);
+ eTop.dx = FixedToFloat(vMax_fx - vMid_fx);
+ eTop.dy = FixedToFloat(vMax_fy - vMid_fy);
+ eBot.dx = FixedToFloat(vMid_fx - vMin_fx);
+ eBot.dy = FixedToFloat(vMid_fy - vMin_fy);
- /* compute oneOverArea */
+ /* compute area, oneOverArea and perform backface culling */
{
const GLfloat area = eMaj.dx * eBot.dy - eBot.dx * eMaj.dy;
/* Do backface culling */
if (area * bf < 0.0)
- return;
+ return;
- if (area == 0.0F)
+ if (IS_INF_OR_NAN(area) || area == 0.0F)
return;
- /* check for very tiny triangle */
- if (area * area < 0.0025F) /* square it to ensure positive value */
- oneOverArea = 1.0F / 0.0025F; /* a close-enough value */
- else
- oneOverArea = 1.0F / area;
+ oneOverArea = 1.0F / area;
}
#ifndef DO_OCCLUSION_TEST
ctx->OcclusionResult = GL_TRUE;
#endif
+ span.facing = ctx->_Facing; /* for 2-sided stencil test */
/* Edge setup. For a triangle strip these could be reused... */
{
- /* fixed point Y coordinates */
- GLfixed vMin_fx = FloatToFixed(VB->Win.data[vMin][0] + 0.5F);
- GLfixed vMin_fy = FloatToFixed(VB->Win.data[vMin][1] - 0.5F);
- GLfixed vMid_fx = FloatToFixed(VB->Win.data[vMid][0] + 0.5F);
- GLfixed vMid_fy = FloatToFixed(VB->Win.data[vMid][1] - 0.5F);
- GLfixed vMax_fy = FloatToFixed(VB->Win.data[vMax][1] - 0.5F);
-
eMaj.fsy = FixedCeil(vMin_fy);
- eMaj.lines = FixedToInt(vMax_fy + FIXED_ONE - FIXED_EPSILON - eMaj.fsy);
+ eMaj.lines = FixedToInt(FixedCeil(vMax_fy - eMaj.fsy));
if (eMaj.lines > 0) {
GLfloat dxdy = eMaj.dx / eMaj.dy;
eMaj.fdxdy = SignedFloatToFixed(dxdy);
}
eTop.fsy = FixedCeil(vMid_fy);
- eTop.lines = FixedToInt(vMax_fy + FIXED_ONE - FIXED_EPSILON - eTop.fsy);
+ eTop.lines = FixedToInt(FixedCeil(vMax_fy - eTop.fsy));
if (eTop.lines > 0) {
GLfloat dxdy = eTop.dx / eTop.dy;
eTop.fdxdy = SignedFloatToFixed(dxdy);
}
eBot.fsy = FixedCeil(vMin_fy);
- eBot.lines = FixedToInt(vMid_fy + FIXED_ONE - FIXED_EPSILON - eBot.fsy);
+ eBot.lines = FixedToInt(FixedCeil(vMid_fy - eBot.fsy));
if (eBot.lines > 0) {
GLfloat dxdy = eBot.dx / eBot.dy;
eBot.fdxdy = SignedFloatToFixed(dxdy);
* By stepping rasterization parameters along the major edge,
* we can avoid recomputing them at the discontinuity where
* the top and bottom edges meet. However, this forces us to
- * be able to scan both left-to-right and right-to-left.
+ * be able to scan both left-to-right and right-to-left.
* Also, we must determine whether the major edge is at the
* left or right side of the triangle. We do this by
* computing the magnitude of the cross-product of the major
*/
{
- GLint ltor; /* true if scanning left-to-right */
+ GLint scan_from_left_to_right; /* true if scanning left-to-right */
#ifdef INTERP_Z
- GLfloat dzdx, dzdy; GLfixed fdzdx;
- GLfloat dfogdx, dfogdy; GLfixed fdfogdx;
+ GLfloat dzdx, dzdy;
#endif
-#ifdef INTERP_RGB
- GLfloat drdx, drdy; GLfixed fdrdx;
- GLfloat dgdx, dgdy; GLfixed fdgdx;
- GLfloat dbdx, dbdy; GLfixed fdbdx;
+#ifdef INTERP_FOG
+ GLfloat dfogdy;
#endif
-#ifdef INTERP_SPEC
- GLfloat dsrdx, dsrdy; GLfixed fdsrdx;
- GLfloat dsgdx, dsgdy; GLfixed fdsgdx;
- GLfloat dsbdx, dsbdy; GLfixed fdsbdx;
+#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
+ GLfloat drdx, drdy;
+ GLfloat dgdx, dgdy;
+ GLfloat dbdx, dbdy;
#endif
-#ifdef INTERP_ALPHA
- GLfloat dadx, dady; GLfixed fdadx;
+#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; GLfixed fdidx;
+ GLfloat didx, didy;
#endif
#ifdef INTERP_INT_TEX
- GLfloat dsdx, dsdy; GLfixed fdsdx;
- GLfloat dtdx, dtdy; GLfixed fdtdx;
+ GLfloat dsdx, dsdy;
+ GLfloat dtdx, dtdy;
#endif
#ifdef INTERP_TEX
GLfloat dsdx, dsdy;
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];
+ GLfloat dsdx[MAX_TEXTURE_COORD_UNITS], dsdy[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dtdx[MAX_TEXTURE_COORD_UNITS], dtdy[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dudx[MAX_TEXTURE_COORD_UNITS], dudy[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dvdx[MAX_TEXTURE_COORD_UNITS], dvdy[MAX_TEXTURE_COORD_UNITS];
#endif
/*
SETUP_CODE
#endif
- ltor = (oneOverArea < 0.0F);
+ scan_from_left_to_right = (oneOverArea < 0.0F);
+
/* compute d?/dx and d?/dy derivatives */
#ifdef INTERP_Z
+ span.interpMask |= SPAN_Z;
{
GLfloat eMaj_dz, eBot_dz;
- eMaj_dz = VB->Win.data[vMax][2] - VB->Win.data[vMin][2];
- eBot_dz = VB->Win.data[vMid][2] - VB->Win.data[vMin][2];
+ 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) {
/* probably a sliver triangle */
dzdy = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
}
if (depthBits <= 16)
- fdzdx = SignedFloatToFixed(dzdx);
+ span.zStep = SignedFloatToFixed(dzdx);
else
- fdzdx = (GLint) dzdx;
+ span.zStep = (GLint) dzdx;
}
+#endif
+#ifdef INTERP_FOG
+ span.interpMask |= SPAN_FOG;
{
- GLfloat eMaj_dfog, eBot_dfog;
- eMaj_dfog = (VB->FogCoordPtr->data[vMax] - VB->FogCoordPtr->data[vMin]) * 256;
- eBot_dfog = (VB->FogCoordPtr->data[vMid] - VB->FogCoordPtr->data[vMin]) * 256;
- dfogdx = oneOverArea * (eMaj_dfog * eBot.dy - eMaj.dy * eBot_dfog);
- fdfogdx = SignedFloatToFixed(dfogdx);
+ 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);
}
#endif
#ifdef INTERP_RGB
- {
+ span.interpMask |= SPAN_RGBA;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
GLfloat eMaj_dr, eBot_dr;
- eMaj_dr = (GLint) VB->ColorPtr->data[vMax][0]
- - (GLint) VB->ColorPtr->data[vMin][0];
- eBot_dr = (GLint) VB->ColorPtr->data[vMid][0]
- - (GLint) VB->ColorPtr->data[vMin][0];
+ GLfloat eMaj_dg, eBot_dg;
+ GLfloat eMaj_db, eBot_db;
+# ifdef INTERP_ALPHA
+ GLfloat eMaj_da, eBot_da;
+# 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);
- fdrdx = SignedFloatToFixed(drdx);
+ span.redStep = SignedFloatToFixed(drdx);
drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
- }
- {
- GLfloat eMaj_dg, eBot_dg;
- eMaj_dg = (GLint) VB->ColorPtr->data[vMax][1]
- - (GLint) VB->ColorPtr->data[vMin][1];
- eBot_dg = (GLint) VB->ColorPtr->data[vMid][1]
- - (GLint) VB->ColorPtr->data[vMin][1];
+ 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);
- fdgdx = SignedFloatToFixed(dgdx);
+ 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);
+# 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
}
- {
+ else {
+ 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;
+# ifdef INTERP_ALPHA
+ dadx = dady = 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;
- eMaj_db = (GLint) VB->ColorPtr->data[vMax][2]
- - (GLint) VB->ColorPtr->data[vMin][2];
- eBot_db = (GLint) VB->ColorPtr->data[vMid][2]
- - (GLint) VB->ColorPtr->data[vMin][2];
+ 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);
- fdbdx = SignedFloatToFixed(dbdx);
- dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+ 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;
- eMaj_dsr = (GLint) VB->SecondaryColorPtr->data[vMax][0]
- - (GLint) VB->SecondaryColorPtr->data[vMin][0];
- eBot_dsr = (GLint) VB->SecondaryColorPtr->data[vMid][0]
- - (GLint) VB->SecondaryColorPtr->data[vMin][0];
+ 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);
- fdsrdx = SignedFloatToFixed(dsrdx);
+ span.specRedStep = SignedFloatToFixed(dsrdx);
dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
- }
- {
- GLfloat eMaj_dsg, eBot_dsg;
- eMaj_dsg = (GLint) VB->SecondaryColorPtr->data[vMax][1]
- - (GLint) VB->SecondaryColorPtr->data[vMin][1];
- eBot_dsg = (GLint) VB->SecondaryColorPtr->data[vMid][1]
- - (GLint) VB->SecondaryColorPtr->data[vMin][1];
+ 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);
- fdsgdx = SignedFloatToFixed(dsgdx);
+ 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_dsb = (GLint) VB->SecondaryColorPtr->data[vMax][2]
- - (GLint) VB->SecondaryColorPtr->data[vMin][2];
- eBot_dsb = (GLint) VB->SecondaryColorPtr->data[vMid][2]
- - (GLint) VB->SecondaryColorPtr->data[vMin][2];
+ 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);
- fdsbdx = SignedFloatToFixed(dsbdx);
- dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
+ span.specBlueStep = dsbdx;
+ dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
}
-#endif
-#ifdef INTERP_ALPHA
- {
- GLfloat eMaj_da, eBot_da;
- eMaj_da = (GLint) VB->ColorPtr->data[vMax][3]
- - (GLint) VB->ColorPtr->data[vMin][3];
- eBot_da = (GLint) VB->ColorPtr->data[vMid][3]
- - (GLint) VB->ColorPtr->data[vMin][3];
- dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
- fdadx = SignedFloatToFixed(dadx);
- dady = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+ else {
+ dsrdx = dsrdy = span.specRedStep = 0;
+ dsgdx = dsgdy = span.specGreenStep = 0;
+ dsbdx = dsbdy = span.specBlueStep = 0;
}
#endif
#ifdef INTERP_INDEX
- {
+ span.interpMask |= SPAN_INDEX;
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
GLfloat eMaj_di, eBot_di;
- eMaj_di = (GLint) VB->IndexPtr->data[vMax]
- - (GLint) VB->IndexPtr->data[vMin];
- eBot_di = (GLint) VB->IndexPtr->data[vMid]
- - (GLint) VB->IndexPtr->data[vMin];
+ eMaj_di = (GLfloat) ((GLint) vMax->index - (GLint) vMin->index);
+ eBot_di = (GLfloat) ((GLint) vMid->index - (GLint) vMin->index);
didx = oneOverArea * (eMaj_di * eBot.dy - eMaj.dy * eBot_di);
- fdidx = SignedFloatToFixed(didx);
+ span.indexStep = SignedFloatToFixed(didx);
didy = oneOverArea * (eMaj.dx * eBot_di - eMaj_di * eBot.dx);
}
+ else {
+ span.interpMask |= SPAN_FLAT;
+ didx = didy = 0.0F;
+ span.indexStep = 0;
+ }
#endif
#ifdef INTERP_INT_TEX
+ span.interpMask |= SPAN_INT_TEXTURE;
{
GLfloat eMaj_ds, eBot_ds;
- eMaj_ds = (VB->TexCoordPtr[0]->data[vMax][0]
- - VB->TexCoordPtr[0]->data[vMin][0]) * S_SCALE;
- eBot_ds = (VB->TexCoordPtr[0]->data[vMid][0]
- - VB->TexCoordPtr[0]->data[vMin][0]) * S_SCALE;
+ 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);
- fdsdx = SignedFloatToFixed(dsdx);
+ span.intTexStep[0] = SignedFloatToFixed(dsdx);
dsdy = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
}
- if (VB->TexCoordPtr[0]->size > 1) {
+ {
GLfloat eMaj_dt, eBot_dt;
- eMaj_dt = (VB->TexCoordPtr[0]->data[vMax][1]
- - VB->TexCoordPtr[0]->data[vMin][1]) * T_SCALE;
- eBot_dt = (VB->TexCoordPtr[0]->data[vMid][1]
- - VB->TexCoordPtr[0]->data[vMin][1]) * T_SCALE;
+ 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);
- fdtdx = SignedFloatToFixed(dtdx);
+ span.intTexStep[1] = SignedFloatToFixed(dtdx);
dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
}
- else {
- dtdx = 0;
- fdtdx = SignedFloatToFixed(dtdx);
- dtdy = 0;
- }
#endif
#ifdef INTERP_TEX
+ span.interpMask |= SPAN_TEXTURE;
{
- GLfloat wMax = VB->Win.data[vMax][3];
- GLfloat wMin = VB->Win.data[vMin][3];
- GLfloat wMid = VB->Win.data[vMid][3];
+ 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 = VB->TexCoordPtr[0]->data[vMax][0] * wMax
- - VB->TexCoordPtr[0]->data[vMin][0] * wMin;
- eBot_ds = VB->TexCoordPtr[0]->data[vMid][0] * wMid
- - VB->TexCoordPtr[0]->data[vMin][0] * wMin;
+ 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;
-
- if (VB->TexCoordPtr[0]->size > 1) {
- eMaj_dt = VB->TexCoordPtr[0]->data[vMax][1] * wMax
- - VB->TexCoordPtr[0]->data[vMin][1] * wMin;
- eBot_dt = VB->TexCoordPtr[0]->data[vMid][1] * wMid
- - VB->TexCoordPtr[0]->data[vMin][1] * wMin;
- dtdx = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
- dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- }
- else {
- dtdx = 0;
- dtdy = 0;
- }
-
- if (VB->TexCoordPtr[0]->size > 2) {
- eMaj_du = VB->TexCoordPtr[0]->data[vMax][2] * wMax
- - VB->TexCoordPtr[0]->data[vMin][2] * wMin;
- eBot_du = VB->TexCoordPtr[0]->data[vMid][2] * wMid
- - VB->TexCoordPtr[0]->data[vMin][2] * wMin;
- dudx = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
- dudy = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
- }
- else {
- dudx = 0;
- dudy = 0;
- }
-
- if (VB->TexCoordPtr[0]->size > 3) {
- eMaj_dv = VB->TexCoordPtr[0]->data[vMax][3] * wMax
- - VB->TexCoordPtr[0]->data[vMin][3] * wMin;
- eBot_dv = VB->TexCoordPtr[0]->data[vMid][3] * wMid
- - VB->TexCoordPtr[0]->data[vMin][3] * wMin;
- dvdx = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
- dvdy = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
- }
- else {
- eMaj_dv = wMax - wMin;
- eBot_dv = wMid - wMin;
- dvdx = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
- dvdy = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
- }
+ 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 = VB->Win.data[vMax][3];
- GLfloat wMin = VB->Win.data[vMin][3];
- GLfloat wMid = VB->Win.data[vMid][3];
+ 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) {
+ 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 = VB->TexCoordPtr[u]->data[vMax][0] * wMax
- - VB->TexCoordPtr[u]->data[vMin][0] * wMin;
- eBot_ds = VB->TexCoordPtr[u]->data[vMid][0] * wMid
- - VB->TexCoordPtr[u]->data[vMin][0] * wMin;
+ 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);
-
- if (VB->TexCoordPtr[u]->size > 1) {
- eMaj_dt = VB->TexCoordPtr[u]->data[vMax][1] * wMax
- - VB->TexCoordPtr[u]->data[vMin][1] * wMin;
- eBot_dt = VB->TexCoordPtr[u]->data[vMid][1] * wMid
- - VB->TexCoordPtr[u]->data[vMin][1] * wMin;
- dtdx[u] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
- dtdy[u] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- }
- else {
- dtdx[u] = 0.0;
- dtdy[u] = 0.0;
- }
-
- if (VB->TexCoordPtr[u]->size > 2) {
- eMaj_du = VB->TexCoordPtr[u]->data[vMax][2] * wMax
- - VB->TexCoordPtr[u]->data[vMin][2] * wMin;
- eBot_du = VB->TexCoordPtr[u]->data[vMid][2] * wMid
- - VB->TexCoordPtr[u]->data[vMin][2] * wMin;
- dudx[u] = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
- dudy[u] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
- }
- else {
- dudx[u] = 0.0;
- dudy[u] = 0.0;
- }
-
- if (VB->TexCoordPtr[u]->size > 3) {
- eMaj_dv = VB->TexCoordPtr[u]->data[vMax][3] * wMax
- - VB->TexCoordPtr[u]->data[vMin][3] * wMin;
- eBot_dv = VB->TexCoordPtr[u]->data[vMid][3] * wMid
- - VB->TexCoordPtr[u]->data[vMin][3] * wMin;
- dvdx[u] = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
- dvdy[u] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
- }
- else {
- eMaj_dv = wMax - wMin;
- eBot_dv = wMid - 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][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];
}
}
}
* inside the triangle.
*
* Next we creep down the major edge until we reach that y,
- * and compute the corresponding x coordinate on the edge.
+ * and compute the corresponding x coordinate on the edge.
* Then we find the half-integral x that lies on or just
* inside the edge. This is the first pixel that might lie in
* the interior of the triangle. (We won't know for sure
{
int subTriangle;
- GLfixed fx, fxLeftEdge, fxRightEdge, fdxLeftEdge, fdxRightEdge;
+ GLfixed fx;
+ GLfixed fxLeftEdge = 0, fxRightEdge = 0;
+ GLfixed fdxLeftEdge = 0, fdxRightEdge = 0;
GLfixed fdxOuter;
int idxOuter;
float dxOuter;
- GLfixed fError, fdError;
+ GLfixed fError = 0, fdError = 0;
float adjx, adjy;
GLfixed fy;
- int iy;
#ifdef PIXEL_ADDRESS
- PIXEL_TYPE *pRow;
- int dPRowOuter, dPRowInner; /* offset in bytes */
+ PIXEL_TYPE *pRow = NULL;
+ int dPRowOuter = 0, dPRowInner; /* offset in bytes */
#endif
#ifdef INTERP_Z
# ifdef DEPTH_TYPE
- DEPTH_TYPE *zRow;
- int dZRowOuter, dZRowInner; /* offset in bytes */
+ DEPTH_TYPE *zRow = NULL;
+ int dZRowOuter = 0, dZRowInner; /* offset in bytes */
# endif
- GLfixed fz, fdzOuter, fdzInner;
- GLfixed ffog, fdfogOuter, fdfogInner;
+ GLfixed fz = 0, fdzOuter = 0, fdzInner;
+#endif
+#ifdef INTERP_FOG
+ GLfloat fogLeft = 0, dfogOuter = 0, dfogInner;
#endif
#ifdef INTERP_RGB
- GLfixed fr, fdrOuter, fdrInner;
- GLfixed fg, fdgOuter, fdgInner;
- GLfixed fb, fdbOuter, fdbInner;
+ GLfixed fr = 0, fdrOuter = 0, fdrInner;
+ GLfixed fg = 0, fdgOuter = 0, fdgInner;
+ GLfixed fb = 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, fdsrOuter, fdsrInner;
- GLfixed fsg, fdsgOuter, fdsgInner;
- GLfixed fsb, fdsbOuter, fdsbInner;
+ GLfixed fsr=0, fdsrOuter=0, fdsrInner;
+ GLfixed fsg=0, fdsgOuter=0, fdsgInner;
+ GLfixed fsb=0, fdsbOuter=0, fdsbInner;
#endif
-#ifdef INTERP_ALPHA
- GLfixed fa, fdaOuter, fdaInner;
+#ifdef INTERP_FLOAT_SPEC
+ GLfloat fsr=0, fdsrOuter=0, fdsrInner;
+ GLfloat fsg=0, fdsgOuter=0, fdsgInner;
+ GLfloat fsb=0, fdsbOuter=0, fdsbInner;
#endif
#ifdef INTERP_INDEX
- GLfixed fi, fdiOuter, fdiInner;
+ GLfixed fi=0, fdiOuter=0, fdiInner;
#endif
#ifdef INTERP_INT_TEX
- GLfixed fs, fdsOuter, fdsInner;
- GLfixed ft, fdtOuter, fdtInner;
+ GLfixed fs=0, fdsOuter=0, fdsInner;
+ GLfixed ft=0, fdtOuter=0, fdtInner;
#endif
#ifdef INTERP_TEX
- GLfloat sLeft, dsOuter, dsInner;
- GLfloat tLeft, dtOuter, dtInner;
- GLfloat uLeft, duOuter, duInner;
- GLfloat vLeft, dvOuter, dvInner;
+ GLfloat sLeft=0, dsOuter=0, dsInner;
+ GLfloat tLeft=0, dtOuter=0, dtInner;
+ GLfloat uLeft=0, duOuter=0, duInner;
+ GLfloat vLeft=0, dvOuter=0, dvInner;
#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];
+ GLfloat sLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat tLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat uLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat vLeft[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dsOuter[MAX_TEXTURE_COORD_UNITS], dsInner[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dtOuter[MAX_TEXTURE_COORD_UNITS], dtInner[MAX_TEXTURE_COORD_UNITS];
+ GLfloat duOuter[MAX_TEXTURE_COORD_UNITS], duInner[MAX_TEXTURE_COORD_UNITS];
+ GLfloat dvOuter[MAX_TEXTURE_COORD_UNITS], dvInner[MAX_TEXTURE_COORD_UNITS];
#endif
for (subTriangle=0; subTriangle<=1; subTriangle++) {
if (subTriangle==0) {
/* bottom half */
- if (ltor) {
+ if (scan_from_left_to_right) {
eLeft = &eMaj;
eRight = &eBot;
lines = eRight->lines;
}
else {
/* top half */
- if (ltor) {
+ if (scan_from_left_to_right) {
eLeft = &eMaj;
eRight = &eTop;
lines = eRight->lines;
}
if (setupLeft && eLeft->lines > 0) {
- GLint vLower;
+ const SWvertex *vLower;
GLfixed fsx = eLeft->fsx;
fx = FixedCeil(fsx);
fError = fx - fsx - FIXED_ONE;
(void) dxOuter;
fy = eLeft->fsy;
- iy = FixedToInt(fy);
+ span.y = FixedToInt(fy);
adjx = (float)(fx - eLeft->fx0); /* SCALED! */
adjy = eLeft->adjy; /* SCALED! */
+#ifndef __IBMCPP__
(void) adjx; /* silence compiler warnings */
(void) adjy; /* silence compiler warnings */
-
+#endif
vLower = eLeft->v0;
+#ifndef __IBMCPP__
(void) vLower; /* silence compiler warnings */
+#endif
#ifdef PIXEL_ADDRESS
{
- pRow = PIXEL_ADDRESS( FixedToInt(fxLeftEdge), iy );
+ pRow = (PIXEL_TYPE *) PIXEL_ADDRESS(FixedToInt(fxLeftEdge), span.y);
dPRowOuter = -((int)BYTES_PER_ROW) + idxOuter * sizeof(PIXEL_TYPE);
/* negative because Y=0 at bottom and increases upward */
}
#ifdef INTERP_Z
{
- GLfloat z0 = VB->Win.data[vLower][2] + ctx->PolygonZoffset;
+ GLfloat z0 = vLower->win[2];
if (depthBits <= 16) {
/* interpolate fixed-pt values */
GLfloat tmp = (z0 * FIXED_SCALE +
}
else {
/* interpolate depth values exactly */
- fz = (GLint) (z0 + dzdx*FixedToFloat(adjx) + dzdy*FixedToFloat(adjy));
+ fz = (GLint) (z0 + dzdx * FixedToFloat(adjx)
+ + dzdy * FixedToFloat(adjy));
fdzOuter = (GLint) (dzdy + dxOuter * dzdx);
}
# ifdef DEPTH_TYPE
- zRow = (DEPTH_TYPE *) _mesa_zbuffer_address(ctx, FixedToInt(fxLeftEdge), iy);
+ zRow = (DEPTH_TYPE *)
+ _mesa_zbuffer_address(ctx, FixedToInt(fxLeftEdge), span.y);
dZRowOuter = (ctx->DrawBuffer->Width + idxOuter) * sizeof(DEPTH_TYPE);
# endif
}
- ffog = FloatToFixed(VB->FogCoordPtr->data[vLower]) * 256 + dfogdx * adjx + dfogdy * adjy + FIXED_HALF;
- fdfogOuter = SignedFloatToFixed(dfogdy + dxOuter * dfogdx);
+#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
- fr = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][0])
- + drdx * adjx + drdy * adjy) + FIXED_HALF;
- fdrOuter = SignedFloatToFixed(drdy + dxOuter * drdx);
-
- fg = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][1])
- + dgdx * adjx + dgdy * adjy) + FIXED_HALF;
- fdgOuter = SignedFloatToFixed(dgdy + dxOuter * dgdx);
-
- fb = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][2])
- + dbdx * adjx + dbdy * adjy) + FIXED_HALF;
- fdbOuter = SignedFloatToFixed(dbdy + dxOuter * dbdx);
+ 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);
+# ifdef INTERP_ALPHA
+ fa = (GLfixed) (ChanToFixed(vLower->color[ACOMP])
+ + dadx * adjx + dady * adjy) + FIXED_HALF;
+ fdaOuter = SignedFloatToFixed(dady + dxOuter * dadx);
+# endif
+ }
+ else {
+ ASSERT (ctx->Light.ShadeModel == GL_FLAT);
+ fr = ChanToFixed(v2->color[RCOMP]);
+ fg = ChanToFixed(v2->color[GCOMP]);
+ fb = ChanToFixed(v2->color[BCOMP]);
+ fdrOuter = fdgOuter = fdbOuter = 0;
+# ifdef INTERP_ALPHA
+ fa = 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
- fsr = (GLfixed)(IntToFixed(VB->SecondaryColorPtr->data[vLower][0])
- + dsrdx * adjx + dsrdy * adjy) + FIXED_HALF;
- fdsrOuter = SignedFloatToFixed(dsrdy + dxOuter * dsrdx);
-
- fsg = (GLfixed)(IntToFixed(VB->SecondaryColorPtr->data[vLower][1])
- + dsgdx * adjx + dsgdy * adjy) + FIXED_HALF;
- fdsgOuter = SignedFloatToFixed(dsgdy + dxOuter * dsgdx);
-
- fsb = (GLfixed)(IntToFixed(VB->SecondaryColorPtr->data[vLower][2])
- + dsbdx * adjx + dsbdy * adjy) + FIXED_HALF;
- fdsbOuter = SignedFloatToFixed(dsbdy + dxOuter * dsbdx);
+ 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_ALPHA
- fa = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][3])
- + dadx * adjx + dady * adjy) + FIXED_HALF;
- fdaOuter = SignedFloatToFixed(dady + dxOuter * dadx);
+#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
#ifdef INTERP_INDEX
- fi = (GLfixed)(VB->IndexPtr->data[vLower] * FIXED_SCALE
- + didx * adjx + didy * adjy) + FIXED_HALF;
- fdiOuter = SignedFloatToFixed(didy + dxOuter * didx);
+ if (ctx->Light.ShadeModel == GL_SMOOTH) {
+ fi = (GLfixed)(vLower->index * FIXED_SCALE
+ + didx * adjx + didy * adjy) + FIXED_HALF;
+ fdiOuter = SignedFloatToFixed(didy + dxOuter * didx);
+ }
+ else {
+ fi = (GLfixed) (v2->index * FIXED_SCALE);
+ fdiOuter = 0;
+ }
#endif
#ifdef INTERP_INT_TEX
{
GLfloat s0, t0;
- s0 = VB->TexCoordPtr[0]->data[vLower][0] * S_SCALE;
- fs = (GLfixed)(s0 * FIXED_SCALE + dsdx * adjx + dsdy * adjy) + FIXED_HALF;
+ s0 = vLower->texcoord[0][0] * S_SCALE;
+ fs = (GLfixed)(s0 * FIXED_SCALE + dsdx * adjx
+ + dsdy * adjy) + FIXED_HALF;
fdsOuter = SignedFloatToFixed(dsdy + dxOuter * dsdx);
- if (VB->TexCoordPtr[0]->size > 1)
- {
- t0 = VB->TexCoordPtr[0]->data[vLower][1] * T_SCALE;
- ft = (GLfixed)(t0 * FIXED_SCALE + dtdx * adjx + dtdy * adjy) + FIXED_HALF;
- fdtOuter = SignedFloatToFixed(dtdy + dxOuter * dtdx);
- }
- else
- {
- t0 = 0;
- ft = (GLfixed) FIXED_HALF;
- fdtOuter = SignedFloatToFixed(0);
- }
- }
+ t0 = vLower->texcoord[0][1] * T_SCALE;
+ ft = (GLfixed)(t0 * FIXED_SCALE + dtdx * adjx
+ + dtdy * adjy) + FIXED_HALF;
+ fdtOuter = SignedFloatToFixed(dtdy + dxOuter * dtdx);
+ }
#endif
#ifdef INTERP_TEX
{
- GLfloat invW = VB->Win.data[vLower][3];
+ GLfloat invW = vLower->win[3];
GLfloat s0, t0, u0, v0;
- s0 = VB->TexCoordPtr[0]->data[vLower][0] * invW;
- sLeft = s0 + (dsdx * adjx + dsdy * adjy) * (1.0F/FIXED_SCALE);
- dsOuter = dsdy + dxOuter * dsdx;
- if (VB->TexCoordPtr[0]->size > 1) {
- t0 = VB->TexCoordPtr[0]->data[vLower][1] * invW;
- tLeft = t0 + (dtdx * adjx + dtdy * adjy) * (1.0F/FIXED_SCALE);
- dtOuter = dtdy + dxOuter * dtdx;
- }
- else {
- tLeft = dtOuter = 0.0;
- }
- if (VB->TexCoordPtr[0]->size > 2) {
- u0 = VB->TexCoordPtr[0]->data[vLower][2] * invW;
- uLeft = u0 + (dudx * adjx + dudy * adjy) * (1.0F/FIXED_SCALE);
- duOuter = dudy + dxOuter * dudx;
- }
- else {
- uLeft = duOuter = 0.0;
- }
- if (VB->TexCoordPtr[0]->size > 3) {
- v0 = VB->TexCoordPtr[0]->data[vLower][3] * invW;
- }
- else {
- v0 = invW;
- }
- vLeft = v0 + (dvdx * adjx + dvdy * adjy) * (1.0F/FIXED_SCALE);
- dvOuter = dvdy + dxOuter * dvdx;
+ 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];
}
#endif
#ifdef INTERP_MULTITEX
{
GLuint u;
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- GLfloat invW = VB->Win.data[vLower][3];
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
+ GLfloat invW = vLower->win[3];
GLfloat s0, t0, u0, v0;
- s0 = VB->TexCoordPtr[u]->data[vLower][0] * invW;
- sLeft[u] = s0 + (dsdx[u] * adjx + dsdy[u] * adjy) * (1.0F/FIXED_SCALE);
- dsOuter[u] = dsdy[u] + dxOuter * dsdx[u];
- if (VB->TexCoordPtr[u]->size > 1) {
- t0 = VB->TexCoordPtr[u]->data[vLower][1] * invW;
- tLeft[u] = t0 + (dtdx[u] * adjx + dtdy[u] * adjy) * (1.0F/FIXED_SCALE);
- dtOuter[u] = dtdy[u] + dxOuter * dtdx[u];
- }
- else {
- tLeft[u] = dtOuter[u] = 0.0;
- }
- if (VB->TexCoordPtr[u]->size > 2) {
- u0 = VB->TexCoordPtr[u]->data[vLower][2] * invW;
- uLeft[u] = u0 + (dudx[u] * adjx + dudy[u] * adjy) * (1.0F/FIXED_SCALE);
- duOuter[u] = dudy[u] + dxOuter * dudx[u];
- }
- else {
- uLeft[u] = duOuter[u] = 0.0;
- }
- if (VB->TexCoordPtr[u]->size > 3) {
- v0 = VB->TexCoordPtr[u]->data[vLower][3] * invW;
- }
- else {
- v0 = invW;
- }
- vLeft[u] = v0 + (dvdx[u] * adjx + dvdy[u] * adjy) * (1.0F/FIXED_SCALE);
- dvOuter[u] = dvdy[u] + dxOuter * dvdx[u];
+ 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];
}
}
}
# ifdef DEPTH_TYPE
dZRowInner = dZRowOuter + sizeof(DEPTH_TYPE);
# endif
- fdzInner = fdzOuter + fdzdx;
- fdfogInner = fdfogOuter + fdfogdx;
+ fdzInner = fdzOuter + span.zStep;
#endif
-#ifdef INTERP_RGB
- fdrInner = fdrOuter + fdrdx;
- fdgInner = fdgOuter + fdgdx;
- fdbInner = fdbOuter + fdbdx;
+#ifdef INTERP_FOG
+ dfogInner = dfogOuter + span.fogStep;
#endif
-#ifdef INTERP_SPEC
- fdsrInner = fdsrOuter + fdsrdx;
- fdsgInner = fdsgOuter + fdsgdx;
- fdsbInner = fdsbOuter + fdsbdx;
+#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
+ fdrInner = fdrOuter + span.redStep;
+ fdgInner = fdgOuter + span.greenStep;
+ fdbInner = fdbOuter + span.blueStep;
#endif
-#ifdef INTERP_ALPHA
- fdaInner = fdaOuter + fdadx;
+#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
+ 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 + fdidx;
+ fdiInner = fdiOuter + span.indexStep;
#endif
#ifdef INTERP_INT_TEX
- fdsInner = fdsOuter + fdsdx;
- fdtInner = fdtOuter + fdtdx;
+ fdsInner = fdsOuter + span.intTexStep[0];
+ fdtInner = fdtOuter + span.intTexStep[1];
#endif
#ifdef INTERP_TEX
- dsInner = dsOuter + dsdx;
- dtInner = dtOuter + dtdx;
- duInner = duOuter + dudx;
- dvInner = dvOuter + dvdx;
+ 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] + dsdx[u];
- dtInner[u] = dtOuter[u] + dtdx[u];
- duInner[u] = duOuter[u] + dudx[u];
- dvInner[u] = dvOuter[u] + dvdx[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];
}
}
}
#endif
- while (lines>0) {
+ while (lines > 0) {
/* initialize the span interpolants to the leftmost value */
/* ff = fixed-pt fragment */
- GLint left = FixedToInt(fxLeftEdge);
- GLint right = FixedToInt(fxRightEdge);
+ 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
- GLfixed ffz = fz;
- GLfixed fffog = ffog;
+ span.z = fz;
#endif
-#ifdef INTERP_RGB
- GLfixed ffr = fr, ffg = fg, ffb = fb;
+#ifdef INTERP_FOG
+ span.fog = fogLeft;
#endif
-#ifdef INTERP_SPEC
- GLfixed ffsr = fsr, ffsg = fsg, ffsb = fsb;
+#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
+ span.red = fr;
+ span.green = fg;
+ span.blue = fb;
#endif
-#ifdef INTERP_ALPHA
- GLfixed ffa = fa;
+#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
+ span.alpha = fa;
+#endif
+#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
+ span.specRed = fsr;
+ span.specGreen = fsg;
+ span.specBlue = fsb;
#endif
#ifdef INTERP_INDEX
- GLfixed ffi = fi;
+ span.index = fi;
#endif
#ifdef INTERP_INT_TEX
- GLfixed ffs = fs, fft = ft;
+ span.intTex[0] = fs;
+ span.intTex[1] = ft;
#endif
+
#ifdef INTERP_TEX
- GLfloat ss = sLeft, tt = tLeft, uu = uLeft, vv = vLeft;
+ span.tex[0][0] = sLeft;
+ span.tex[0][1] = tLeft;
+ span.tex[0][2] = uLeft;
+ span.tex[0][3] = vLeft;
#endif
+
#ifdef INTERP_MULTITEX
- GLfloat ss[MAX_TEXTURE_UNITS];
- GLfloat tt[MAX_TEXTURE_UNITS];
- GLfloat uu[MAX_TEXTURE_UNITS];
- GLfloat vv[MAX_TEXTURE_UNITS];
{
GLuint u;
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- ss[u] = sLeft[u];
- tt[u] = tLeft[u];
- uu[u] = uLeft[u];
- vv[u] = vLeft[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_RGB
{
/* need this to accomodate round-off errors */
- GLfixed ffrend = ffr+(right-left-1)*fdrdx;
- GLfixed ffgend = ffg+(right-left-1)*fdgdx;
- GLfixed ffbend = ffb+(right-left-1)*fdbdx;
- if (ffrend<0) ffr -= ffrend;
- if (ffgend<0) ffg -= ffgend;
- if (ffbend<0) ffb -= ffbend;
- if (ffr<0) ffr = 0;
- if (ffg<0) ffg = 0;
- if (ffb<0) ffb = 0;
+ 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;
+ }
}
#endif
-#ifdef INTERP_SPEC
+#ifdef INTERP_ALPHA
{
- /* need this to accomodate round-off errors */
- GLfixed ffsrend = ffsr+(right-left-1)*fdsrdx;
- GLfixed ffsgend = ffsg+(right-left-1)*fdsgdx;
- GLfixed ffsbend = ffsb+(right-left-1)*fdsbdx;
- if (ffsrend<0) ffsr -= ffsrend;
- if (ffsgend<0) ffsg -= ffsgend;
- if (ffsbend<0) ffsb -= ffsbend;
- if (ffsr<0) ffsr = 0;
- if (ffsg<0) ffsg = 0;
- if (ffsb<0) ffsb = 0;
+ 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_ALPHA
+#ifdef INTERP_SPEC
{
- GLfixed ffaend = ffa+(right-left-1)*fdadx;
- if (ffaend<0) ffa -= ffaend;
- if (ffa<0) ffa = 0;
+ /* 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;
+ }
}
#endif
#ifdef INTERP_INDEX
- if (ffi<0) ffi = 0;
+ if (span.index < 0) span.index = 0;
#endif
- INNER_LOOP( left, right, iy );
+ /* This is where we actually generate fragments */
+ if (span.end > 0) {
+ RENDER_SPAN( span );
+ }
/*
* Advance to the next scan line. Compute the
* pixel-center x coordinate so that it stays
* on or inside the major edge.
*/
- iy++;
+ (span.y)++;
lines--;
fxLeftEdge += fdxLeftEdge;
if (fError >= 0) {
fError -= FIXED_ONE;
#ifdef PIXEL_ADDRESS
- pRow = (PIXEL_TYPE *) ((GLubyte*)pRow + dPRowOuter);
+ pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowOuter);
#endif
#ifdef INTERP_Z
# ifdef DEPTH_TYPE
- zRow = (DEPTH_TYPE *) ((GLubyte*)zRow + dZRowOuter);
+ zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowOuter);
# endif
fz += fdzOuter;
- ffog += fdfogOuter;
#endif
-#ifdef INTERP_RGB
- fr += fdrOuter; fg += fdgOuter; fb += fdbOuter;
+#ifdef INTERP_FOG
+ fogLeft += dfogOuter;
#endif
-#ifdef INTERP_SPEC
- fsr += fdsrOuter; fsg += fdsgOuter; fsb += fdsbOuter;
+#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
+ fr += fdrOuter;
+ fg += fdgOuter;
+ fb += fdbOuter;
#endif
-#ifdef INTERP_ALPHA
+#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
fa += fdaOuter;
#endif
+#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
+ fsr += fdsrOuter;
+ fsg += fdsgOuter;
+ fsb += fdsbOuter;
+#endif
#ifdef INTERP_INDEX
fi += fdiOuter;
#endif
#ifdef INTERP_INT_TEX
- fs += fdsOuter; ft += fdtOuter;
+ fs += fdsOuter;
+ ft += fdtOuter;
#endif
#ifdef INTERP_TEX
- sLeft += dsOuter;
- tLeft += dtOuter;
- uLeft += duOuter;
- vLeft += dvOuter;
+ 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) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
sLeft[u] += dsOuter[u];
tLeft[u] += dtOuter[u];
uLeft[u] += duOuter[u];
}
else {
#ifdef PIXEL_ADDRESS
- pRow = (PIXEL_TYPE *) ((GLubyte*)pRow + dPRowInner);
+ pRow = (PIXEL_TYPE *) ((GLubyte *) pRow + dPRowInner);
#endif
#ifdef INTERP_Z
# ifdef DEPTH_TYPE
- zRow = (DEPTH_TYPE *) ((GLubyte*)zRow + dZRowInner);
+ zRow = (DEPTH_TYPE *) ((GLubyte *) zRow + dZRowInner);
# endif
fz += fdzInner;
- ffog += fdfogInner;
#endif
-#ifdef INTERP_RGB
- fr += fdrInner; fg += fdgInner; fb += fdbInner;
+#ifdef INTERP_FOG
+ fogLeft += dfogInner;
#endif
-#ifdef INTERP_SPEC
- fsr += fdsrInner; fsg += fdsgInner; fsb += fdsbInner;
+#if defined(INTERP_RGB) || defined(INTERP_FLOAT_RGBA)
+ fr += fdrInner;
+ fg += fdgInner;
+ fb += fdbInner;
#endif
-#ifdef INTERP_ALPHA
+#if defined(INTERP_ALPHA) || defined(INTERP_FLOAT_RGBA)
fa += fdaInner;
#endif
+#if defined(INTERP_SPEC) || defined(INTERP_FLOAT_SPEC)
+ fsr += fdsrInner;
+ fsg += fdsgInner;
+ fsb += fdsbInner;
+#endif
#ifdef INTERP_INDEX
fi += fdiInner;
#endif
#ifdef INTERP_INT_TEX
- fs += fdsInner; ft += fdtInner;
+ fs += fdsInner;
+ ft += fdtInner;
#endif
#ifdef INTERP_TEX
- sLeft += dsInner;
- tLeft += dtInner;
- uLeft += duInner;
- vLeft += dvInner;
+ 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) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
sLeft[u] += dsInner[u];
tLeft[u] += dtInner[u];
uLeft[u] += duInner[u];
} /* for subTriangle */
}
+#ifdef CLEANUP_CODE
+ CLEANUP_CODE
+#endif
}
}
#undef SETUP_CODE
-#undef INNER_LOOP
+#undef CLEANUP_CODE
+#undef RENDER_SPAN
#undef PIXEL_TYPE
#undef BYTES_PER_ROW
#undef PIXEL_ADDRESS
#undef INTERP_Z
+#undef INTERP_FOG
#undef INTERP_RGB
-#undef INTERP_SPEC
#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 S_SCALE
#undef T_SCALE
#undef FixedToDepth
#undef DO_OCCLUSION_TEST
+#undef NAME
projects / mesa.git / blobdiff