-/* $Id: s_tritemp.h,v 1.1 2000/10/31 18:00:04 keithw Exp $ */
+/* $Id: s_tritemp.h,v 1.11 2001/03/03 00:37:27 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2001 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"),
* 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_LAMBDA - if defined, the lambda value is computed at every
+ * pixel, to apply MIPMAPPING, and min/maxification
+ * INTERP_MULTILAMBDA - like above but for multitexturing, i.e.
+ * a lambda value for every texture unit
*
* When one can directly address pixels in the color buffer the following
* macros can be defined and used to compute pixel addresses during
*/
-/*void triangle( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint pv )*/
+/*void triangle( GLcontext *ctx, SWvertex *v0, SWvertex *v1, SWvertex *v2 )*/
{
typedef struct {
- GLint v0, v1; /* Y(v0) < Y(v1) */
+ 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 */
} 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;
+ GLboolean tiny;
/* 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];
+ GLfloat y0 = v0->win[1];
+ GLfloat y1 = v1->win[1];
+ GLfloat y2 = v2->win[1];
if (y0<=y1) {
if (y1<=y2) {
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];
+ eMaj.dx = vMax->win[0] - vMin->win[0];
+ eMaj.dy = vMax->win[1] - vMin->win[1];
+ eTop.dx = vMax->win[0] - vMid->win[0];
+ eTop.dy = vMax->win[1] - vMid->win[1];
+ eBot.dx = vMid->win[0] - vMin->win[0];
+ eBot.dy = vMid->win[1] - vMin->win[1];
/* compute oneOverArea */
{
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
+ if (area * area < (0.05F * 0.05F)) { /* square to ensure positive value */
+ oneOverArea = 1.0F / 0.05F; /* a close-enough value */
+ tiny = GL_TRUE;
+ }
+ else {
oneOverArea = 1.0F / area;
+ tiny = GL_FALSE;
+ }
}
#ifndef DO_OCCLUSION_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);
+ GLfixed vMin_fx = FloatToFixed(vMin->win[0] + 0.5F);
+ GLfixed vMin_fy = FloatToFixed(vMin->win[1] - 0.5F);
+ GLfixed vMid_fx = FloatToFixed(vMid->win[0] + 0.5F);
+ GLfixed vMid_fy = FloatToFixed(vMid->win[1] - 0.5F);
+ GLfixed vMax_fy = FloatToFixed(vMax->win[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);
GLfloat dvdx[MAX_TEXTURE_UNITS], dvdy[MAX_TEXTURE_UNITS];
#endif
+#ifdef INTERP_LAMBDA
+#ifndef INTERP_TEX
+#error "Mipmapping without texturing doesn't make sense."
+#endif
+ GLfloat lambda_nominator;
+#endif /* INTERP_LAMBDA */
+
+#ifdef INTERP_MULTILAMBDA
+#ifndef INTERP_MULTITEX
+#error "Multi-Mipmapping without multi-texturing doesn't make sense."
+#endif
+ GLfloat lambda_nominator[MAX_TEXTURE_UNITS];
+#endif /* INTERP_MULTILAMBDA */
+
+
/*
* Execute user-supplied setup code
*/
#ifdef INTERP_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 */
}
{
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;
+ eMaj_dfog = (vMax->fog - vMin->fog) * 256;
+ eBot_dfog = (vMid->fog - vMin->fog) * 256;
dfogdx = oneOverArea * (eMaj_dfog * eBot.dy - eMaj.dy * eBot_dfog);
fdfogdx = SignedFloatToFixed(dfogdx);
dfogdy = oneOverArea * (eMaj.dx * eBot_dfog - eMaj_dfog * eBot.dx);
}
#endif
#ifdef INTERP_RGB
- {
+ if (tiny) {
+ /* This is kind of a hack to eliminate RGB color over/underflow
+ * problems when rendering very tiny triangles. We're not doing
+ * anything with alpha or specular color at this time.
+ */
+ drdx = drdy = 0.0; fdrdx = 0;
+ dgdx = dgdy = 0.0; fdgdx = 0;
+ dbdx = dbdy = 0.0; fdbdx = 0;
+ }
+ else {
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;
+ eMaj_dr = (GLint) vMax->color[0] - (GLint) vMin->color[0];
+ eBot_dr = (GLint) vMid->color[0] - (GLint) vMin->color[0];
drdx = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
fdrdx = 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 = (GLint) vMax->color[1] - (GLint) vMin->color[1];
+ eBot_dg = (GLint) vMid->color[1] - (GLint) vMin->color[1];
dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
fdgdx = SignedFloatToFixed(dgdx);
dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
- }
- {
- 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];
+ eMaj_db = (GLint) vMax->color[2] - (GLint) vMin->color[2];
+ eBot_db = (GLint) vMid->color[2] - (GLint) vMin->color[2];
dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
fdbdx = SignedFloatToFixed(dbdx);
dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
#ifdef INTERP_SPEC
{
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];
+ eMaj_dsr = (GLint) vMax->specular[0] - (GLint) vMin->specular[0];
+ eBot_dsr = (GLint) vMid->specular[0] - (GLint) vMin->specular[0];
dsrdx = oneOverArea * (eMaj_dsr * eBot.dy - eMaj.dy * eBot_dsr);
fdsrdx = 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 = (GLint) vMax->specular[1] - (GLint) vMin->specular[1];
+ eBot_dsg = (GLint) vMid->specular[1] - (GLint) vMin->specular[1];
dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
fdsgdx = SignedFloatToFixed(dsgdx);
dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
}
{
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_dsb = (GLint) vMax->specular[2] - (GLint) vMin->specular[2];
+ eBot_dsb = (GLint) vMid->specular[2] - (GLint) vMin->specular[2];
dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
fdsbdx = SignedFloatToFixed(dsbdx);
dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
#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];
+ eMaj_da = (GLint) vMax->color[3] - (GLint) vMin->color[3];
+ eBot_da = (GLint) vMid->color[3] - (GLint) vMin->color[3];
dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
fdadx = SignedFloatToFixed(dadx);
dady = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
#ifdef INTERP_INDEX
{
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 = (GLint) vMax->index - (GLint) vMin->index;
+ eBot_di = (GLint) vMid->index - (GLint) vMin->index;
didx = oneOverArea * (eMaj_di * eBot.dy - eMaj.dy * eBot_di);
fdidx = SignedFloatToFixed(didx);
didy = oneOverArea * (eMaj.dx * eBot_di - eMaj_di * eBot.dx);
#ifdef INTERP_INT_TEX
{
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);
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);
dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
}
- else {
- dtdx = 0;
- fdtdx = SignedFloatToFixed(dtdx);
- dtdy = 0;
- }
#endif
#ifdef INTERP_TEX
{
- 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);
-
- 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);
+
+ 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);
+
+ 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);
}
#endif
#ifdef INTERP_MULTITEX
{
- 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);
- }
+ 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);
+
+ 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);
+
+ 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);
}
}
}
}
if (setupLeft && eLeft->lines > 0) {
- GLint vLower;
+ const SWvertex *vLower;
GLfixed fsx = eLeft->fsx;
fx = FixedCeil(fsx);
fError = fx - fsx - FIXED_ONE;
#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 +
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);
+ {
+ ffog = FloatToFixed(vLower->fog) * 256 + dfogdx * adjx + dfogdy * adjy + FIXED_HALF;
+ fdfogOuter = SignedFloatToFixed(dfogdy + dxOuter * dfogdx);
+ }
#endif
#ifdef INTERP_RGB
- fr = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][0])
+ fr = (GLfixed)(IntToFixed(vLower->color[0])
+ drdx * adjx + drdy * adjy) + FIXED_HALF;
fdrOuter = SignedFloatToFixed(drdy + dxOuter * drdx);
- fg = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][1])
+ fg = (GLfixed)(IntToFixed(vLower->color[1])
+ dgdx * adjx + dgdy * adjy) + FIXED_HALF;
fdgOuter = SignedFloatToFixed(dgdy + dxOuter * dgdx);
- fb = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][2])
+ fb = (GLfixed)(IntToFixed(vLower->color[2])
+ dbdx * adjx + dbdy * adjy) + FIXED_HALF;
fdbOuter = SignedFloatToFixed(dbdy + dxOuter * dbdx);
#endif
#ifdef INTERP_SPEC
- fsr = (GLfixed)(IntToFixed(VB->SecondaryColorPtr->data[vLower][0])
+ fsr = (GLfixed)(IntToFixed(vLower->specular[0])
+ dsrdx * adjx + dsrdy * adjy) + FIXED_HALF;
fdsrOuter = SignedFloatToFixed(dsrdy + dxOuter * dsrdx);
- fsg = (GLfixed)(IntToFixed(VB->SecondaryColorPtr->data[vLower][1])
+ fsg = (GLfixed)(IntToFixed(vLower->specular[1])
+ dsgdx * adjx + dsgdy * adjy) + FIXED_HALF;
fdsgOuter = SignedFloatToFixed(dsgdy + dxOuter * dsgdx);
- fsb = (GLfixed)(IntToFixed(VB->SecondaryColorPtr->data[vLower][2])
+ fsb = (GLfixed)(IntToFixed(vLower->specular[2])
+ dsbdx * adjx + dsbdy * adjy) + FIXED_HALF;
fdsbOuter = SignedFloatToFixed(dsbdy + dxOuter * dsbdx);
#endif
#ifdef INTERP_ALPHA
- fa = (GLfixed)(IntToFixed(VB->ColorPtr->data[vLower][3])
+ fa = (GLfixed)(IntToFixed(vLower->color[3])
+ dadx * adjx + dady * adjy) + FIXED_HALF;
fdaOuter = SignedFloatToFixed(dady + dxOuter * dadx);
#endif
#ifdef INTERP_INDEX
- fi = (GLfixed)(VB->IndexPtr->data[vLower] * FIXED_SCALE
+ fi = (GLfixed)(vLower->index * FIXED_SCALE
+ didx * adjx + didy * adjy) + FIXED_HALF;
fdiOuter = SignedFloatToFixed(didy + dxOuter * didx);
#endif
#ifdef INTERP_INT_TEX
{
GLfloat s0, t0;
- s0 = VB->TexCoordPtr[0]->data[vLower][0] * S_SCALE;
+ 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;
+ s0 = vLower->texcoord[0][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;
- }
+ t0 = vLower->texcoord[0][1] * invW;
+ tLeft = t0 + (dtdx * adjx + dtdy * adjy) * (1.0F/FIXED_SCALE);
+ dtOuter = dtdy + dxOuter * dtdx;
+ u0 = vLower->texcoord[0][2] * invW;
+ uLeft = u0 + (dudx * adjx + dudy * adjy) * (1.0F/FIXED_SCALE);
+ duOuter = dudy + dxOuter * dudx;
+ v0 = vLower->texcoord[0][3] * invW;
vLeft = v0 + (dvdx * adjx + dvdy * adjy) * (1.0F/FIXED_SCALE);
dvOuter = dvdy + dxOuter * dvdx;
}
{
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;
+ s0 = vLower->texcoord[u][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;
- }
+ t0 = vLower->texcoord[u][1] * invW;
+ tLeft[u] = t0 + (dtdx[u] * adjx + dtdy[u] * adjy) * (1.0F/FIXED_SCALE);
+ dtOuter[u] = dtdy[u] + dxOuter * dtdx[u];
+ u0 = vLower->texcoord[u][2] * invW;
+ uLeft[u] = u0 + (dudx[u] * adjx + dudy[u] * adjy) * (1.0F/FIXED_SCALE);
+ duOuter[u] = dudy[u] + dxOuter * dudx[u];
+ v0 = vLower->texcoord[u][3] * invW;
vLeft[u] = v0 + (dvdx[u] * adjx + dvdy[u] * adjy) * (1.0F/FIXED_SCALE);
dvOuter[u] = dvdy[u] + dxOuter * dvdx[u];
}
{
GLuint u;
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
dsInner[u] = dsOuter[u] + dsdx[u];
dtInner[u] = dtOuter[u] + dtdx[u];
duInner[u] = duOuter[u] + dudx[u];
{
GLuint u;
for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
+ if (ctx->Texture.Unit[u]._ReallyEnabled) {
ss[u] = sLeft[u];
tt[u] = tLeft[u];
uu[u] = uLeft[u];
if (ffi<0) ffi = 0;
#endif
+#ifdef INTERP_LAMBDA
+/*
+ * The lambda value is:
+ * log_2(sqrt(f(n))) = 1/2*log_2(f(n)), where f(n) is a function
+ * defined by
+ * f(n):= dudx * dudx + dudy * dudy + dvdx * dvdx + dvdy * dvdy;
+ * and each of this terms is resp.
+ * dudx = dsdx * invQ(n) * tex_width;
+ * dudy = dsdy * invQ(n) * tex_width;
+ * dvdx = dtdx * invQ(n) * tex_height;
+ * dvdy = dtdy * invQ(n) * tex_height;
+ * Therefore the function lambda can be represented (by factoring out) as:
+ * f(n) = lambda_nominator * invQ(n) * invQ(n),
+ * which saves some computation time.
+ */
+ {
+ GLfloat dudx = dsdx /* * invQ*/ * twidth;
+ GLfloat dudy = dsdy /* * invQ*/ * twidth;
+ GLfloat dvdx = dtdx /* * invQ*/ * theight;
+ GLfloat dvdy = dtdy /* * invQ*/ * theight;
+ GLfloat r1 = dudx * dudx + dudy * dudy;
+ GLfloat r2 = dvdx * dvdx + dvdy * dvdy;
+ GLfloat rho2 = r1 + r2; /* was: rho2 = MAX2(r1,r2); */
+ lambda_nominator = rho2;
+ }
+
+ /* set DEST to log_(base 2) of sqrt(rho) */
+ /* 1.442695 = 1/log(2) */
+#define COMPUTE_LAMBDA(DEST, X) \
+ DEST = log( lambda_nominator * (X)*(X) ) * 1.442695F * 0.5F
+#endif
+
+#ifdef INTERP_MULTILAMBDA
+/*
+ * Read the comment for INTERP_LAMBDA, but apply to each texture unit
+ */
+ {
+ GLuint unit;
+ for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ GLfloat dudx = dsdx[unit] /* * invQ*/ * twidth[unit];
+ GLfloat dudy = dsdy[unit] /* * invQ*/ * twidth[unit];
+ GLfloat dvdx = dtdx[unit] /* * invQ*/ * theight[unit];
+ GLfloat dvdy = dtdy[unit] /* * invQ*/ * theight[unit];
+ GLfloat r1 = dudx * dudx + dudy * dudy;
+ GLfloat r2 = dvdx * dvdx + dvdy * dvdy;
+ GLfloat rho2 = r1 + r2; /* used to be: rho2 = MAX2(r1,r2); */
+ lambda_nominator[unit] = rho2;
+ }
+ }
+ }
+ /* set DEST to log_(base 2) of sqrt(rho) */
+#define COMPUTE_MULTILAMBDA(DEST, X, unit) \
+ DEST = log( lambda_nominator[unit] * (X)*(X) ) * 1.442695F * 0.5F
+#endif
+
+
INNER_LOOP( left, right, iy );
/*
zRow = (DEPTH_TYPE *) ((GLubyte*)zRow + dZRowOuter);
# endif
fz += fdzOuter;
- ffog += fdfogOuter;
+ ffog += fdfogOuter;
#endif
#ifdef INTERP_RGB
fr += fdrOuter; fg += fdgOuter; fb += fdbOuter;
{
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];
{
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];
#undef INTERP_INT_TEX
#undef INTERP_TEX
#undef INTERP_MULTITEX
+#undef INTERP_LAMBDA
+#undef COMPUTE_LAMBDA
+#undef INTERP_MULTILAMBDA
+#undef COMPUTE_MULTILAMBDA
#undef S_SCALE
#undef T_SCALE
projects / mesa.git / blobdiff