static void TAG(triangle)(GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 )
{
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
SScontext *swsetup = SWSETUP_CONTEXT(ctx);
SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts;
SWvertex *v[3];
GLfloat z[3];
GLfloat offset, oz0, oz1, oz2;
GLenum mode = GL_FILL;
GLuint facing = 0;
GLchan saved_color[3][4];
GLfloat saved_col0[3][4];
GLfloat saved_spec[3][4];
GLfloat saved_index[3];
v[0] = &verts[e0];
v[1] = &verts[e1];
v[2] = &verts[e2];
if (IND & (SS_TWOSIDE_BIT | SS_OFFSET_BIT | SS_UNFILLED_BIT))
{
GLfloat ex = v[0]->attrib[FRAG_ATTRIB_WPOS][0] - v[2]->attrib[FRAG_ATTRIB_WPOS][0];
GLfloat ey = v[0]->attrib[FRAG_ATTRIB_WPOS][1] - v[2]->attrib[FRAG_ATTRIB_WPOS][1];
GLfloat fx = v[1]->attrib[FRAG_ATTRIB_WPOS][0] - v[2]->attrib[FRAG_ATTRIB_WPOS][0];
GLfloat fy = v[1]->attrib[FRAG_ATTRIB_WPOS][1] - v[2]->attrib[FRAG_ATTRIB_WPOS][1];
GLfloat cc = ex*fy - ey*fx;
if (IND & (SS_TWOSIDE_BIT | SS_UNFILLED_BIT))
{
facing = (cc < 0.0) ^ ctx->Polygon._FrontBit;
if (IND & SS_UNFILLED_BIT)
mode = facing ? ctx->Polygon.BackMode : ctx->Polygon.FrontMode;
if (facing == 1) {
if (IND & SS_TWOSIDE_BIT) {
if (IND & SS_RGBA_BIT) {
if (VB->ColorPtr[1]) {
GLfloat (*vbcolor)[4] = VB->ColorPtr[1]->data;
if (swsetup->intColors) {
COPY_CHAN4(saved_color[0], v[0]->color);
COPY_CHAN4(saved_color[1], v[1]->color);
COPY_CHAN4(saved_color[2], v[2]->color);
}
else {
COPY_4V(saved_col0[0], v[0]->attrib[FRAG_ATTRIB_COL0]);
COPY_4V(saved_col0[1], v[1]->attrib[FRAG_ATTRIB_COL0]);
COPY_4V(saved_col0[2], v[2]->attrib[FRAG_ATTRIB_COL0]);
}
if (VB->ColorPtr[1]->stride) {
if (swsetup->intColors) {
SS_COLOR(v[0]->color, vbcolor[e0]);
SS_COLOR(v[1]->color, vbcolor[e1]);
SS_COLOR(v[2]->color, vbcolor[e2]);
}
else {
COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL0], vbcolor[e0]);
COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL0], vbcolor[e1]);
COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL0], vbcolor[e2]);
}
}
else {
if (swsetup->intColors) {
SS_COLOR(v[0]->color, vbcolor[0]);
SS_COLOR(v[1]->color, vbcolor[0]);
SS_COLOR(v[2]->color, vbcolor[0]);
}
else {
COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL0], vbcolor[0]);
COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL0], vbcolor[0]);
COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL0], vbcolor[0]);
}
}
}
if (VB->SecondaryColorPtr[1]) {
GLfloat (*vbspec)[4] = VB->SecondaryColorPtr[1]->data;
COPY_4V(saved_spec[0], v[0]->attrib[FRAG_ATTRIB_COL1]);
COPY_4V(saved_spec[1], v[1]->attrib[FRAG_ATTRIB_COL1]);
COPY_4V(saved_spec[2], v[2]->attrib[FRAG_ATTRIB_COL1]);
if (VB->SecondaryColorPtr[1]->stride) {
SS_SPEC(v[0]->attrib[FRAG_ATTRIB_COL1], vbspec[e0]);
SS_SPEC(v[1]->attrib[FRAG_ATTRIB_COL1], vbspec[e1]);
SS_SPEC(v[2]->attrib[FRAG_ATTRIB_COL1], vbspec[e2]);
}
else {
SS_SPEC(v[0]->attrib[FRAG_ATTRIB_COL1], vbspec[0]);
SS_SPEC(v[1]->attrib[FRAG_ATTRIB_COL1], vbspec[0]);
SS_SPEC(v[2]->attrib[FRAG_ATTRIB_COL1], vbspec[0]);
}
}
} else {
GLfloat *vbindex = (GLfloat *)VB->IndexPtr[1]->data;
saved_index[0] = v[0]->attrib[FRAG_ATTRIB_CI][0];
saved_index[1] = v[1]->attrib[FRAG_ATTRIB_CI][0];
saved_index[2] = v[2]->attrib[FRAG_ATTRIB_CI][0];
SS_IND(v[0]->attrib[FRAG_ATTRIB_CI][0], (GLuint) vbindex[e0]);
SS_IND(v[1]->attrib[FRAG_ATTRIB_CI][0], (GLuint) vbindex[e1]);
SS_IND(v[2]->attrib[FRAG_ATTRIB_CI][0], (GLuint) vbindex[e2]);
}
}
}
}
if (IND & SS_OFFSET_BIT) {
const GLfloat max = ctx->DrawBuffer->_DepthMaxF;
z[0] = v[0]->attrib[FRAG_ATTRIB_WPOS][2];
z[1] = v[1]->attrib[FRAG_ATTRIB_WPOS][2];
z[2] = v[2]->attrib[FRAG_ATTRIB_WPOS][2];
offset = ctx->Polygon.OffsetUnits;
if (cc * cc > 1e-16) {
const GLfloat ez = z[0] - z[2];
const GLfloat fz = z[1] - z[2];
const GLfloat oneOverArea = 1.0F / cc;
const GLfloat dzdx = FABSF((ey * fz - ez * fy) * oneOverArea);
const GLfloat dzdy = FABSF((ez * fx - ex * fz) * oneOverArea);
offset += MAX2(dzdx, dzdy) * ctx->Polygon.OffsetFactor;
}
oz0 = CLAMP(v[0]->attrib[FRAG_ATTRIB_WPOS][2] + offset, 0.0, max);
oz1 = CLAMP(v[1]->attrib[FRAG_ATTRIB_WPOS][2] + offset, 0.0, max);
oz2 = CLAMP(v[2]->attrib[FRAG_ATTRIB_WPOS][2] + offset, 0.0, max);
}
}
if (mode == GL_POINT) {
if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetPoint) {
v[0]->attrib[FRAG_ATTRIB_WPOS][2] = oz0;
v[1]->attrib[FRAG_ATTRIB_WPOS][2] = oz1;
v[2]->attrib[FRAG_ATTRIB_WPOS][2] = oz2;
}
_swsetup_render_point_tri( ctx, e0, e1, e2, facing );
} else if (mode == GL_LINE) {
if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetLine) {
v[0]->attrib[FRAG_ATTRIB_WPOS][2] = oz0;
v[1]->attrib[FRAG_ATTRIB_WPOS][2] = oz1;
v[2]->attrib[FRAG_ATTRIB_WPOS][2] = oz2;
}
_swsetup_render_line_tri( ctx, e0, e1, e2, facing );
} else {
if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetFill) {
v[0]->attrib[FRAG_ATTRIB_WPOS][2] = oz0;
v[1]->attrib[FRAG_ATTRIB_WPOS][2] = oz1;
v[2]->attrib[FRAG_ATTRIB_WPOS][2] = oz2;
}
_swrast_Triangle( ctx, v[0], v[1], v[2] );
}
if (IND & SS_OFFSET_BIT) {
v[0]->attrib[FRAG_ATTRIB_WPOS][2] = z[0];
v[1]->attrib[FRAG_ATTRIB_WPOS][2] = z[1];
v[2]->attrib[FRAG_ATTRIB_WPOS][2] = z[2];
}
if (IND & SS_TWOSIDE_BIT) {
if (facing == 1) {
if (IND & SS_RGBA_BIT) {
if (VB->ColorPtr[1]) {
if (swsetup->intColors) {
COPY_CHAN4(v[0]->color, saved_color[0]);
COPY_CHAN4(v[1]->color, saved_color[1]);
COPY_CHAN4(v[2]->color, saved_color[2]);
}
else {
COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL0], saved_col0[0]);
COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL0], saved_col0[1]);
COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL0], saved_col0[2]);
}
}
if (VB->SecondaryColorPtr[1]) {
COPY_4V(v[0]->attrib[FRAG_ATTRIB_COL1], saved_spec[0]);
COPY_4V(v[1]->attrib[FRAG_ATTRIB_COL1], saved_spec[1]);
COPY_4V(v[2]->attrib[FRAG_ATTRIB_COL1], saved_spec[2]);
}
} else {
v[0]->attrib[FRAG_ATTRIB_CI][0] = saved_index[0];
v[1]->attrib[FRAG_ATTRIB_CI][0] = saved_index[1];
v[2]->attrib[FRAG_ATTRIB_CI][0] = saved_index[2];
}
}
}
}
static void TAG(quadfunc)( GLcontext *ctx, GLuint v0,
GLuint v1, GLuint v2, GLuint v3 )
{
if (IND & SS_UNFILLED_BIT) {
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
if (VB->EdgeFlag) {
GLubyte ef1 = VB->EdgeFlag[v1];
GLubyte ef3 = VB->EdgeFlag[v3];
VB->EdgeFlag[v1] = 0;
TAG(triangle)( ctx, v0, v1, v3 );
VB->EdgeFlag[v1] = ef1;
VB->EdgeFlag[v3] = 0;
TAG(triangle)( ctx, v1, v2, v3 );
VB->EdgeFlag[v3] = ef3;
}
} else {
TAG(triangle)( ctx, v0, v1, v3 );
TAG(triangle)( ctx, v1, v2, v3 );
}
}
static void TAG(init)( void )
{
tri_tab[IND] = TAG(triangle);
quad_tab[IND] = TAG(quadfunc);
}
#undef IND
#undef TAG