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static __inline__ void TAG(triangle)( GLcontext *ctx, GLuint e0,
GLuint e1, GLuint e2, GLuint pv )
{
i810ContextPtr imesa = I810_CONTEXT(ctx);
struct vertex_buffer *VB = ctx->VB;
i810VertexPtr i810VB = I810_DRIVER_DATA(VB)->verts;
const i810_vertex *v0 = &i810VB[e0].v;
const i810_vertex *v1 = &i810VB[e1].v;
const i810_vertex *v2 = &i810VB[e2].v;
#if (IND & I810_OFFSET_BIT)
GLfloat offset = ctx->Polygon.OffsetUnits * 1.0/0x10000;
#endif
#if (IND & (I810_FLAT_BIT|I810_TWOSIDE_BIT))
int c0 = *(int *)&i810VB[pv].v.color;
int c1 = c0;
int c2 = c0;
#endif
#if (IND & (I810_TWOSIDE_BIT|I810_OFFSET_BIT))
{
GLfloat ex = v0->x - v2->x;
GLfloat ey = v0->y - v2->y;
GLfloat fx = v1->x - v2->x;
GLfloat fy = v1->y - v2->y;
GLfloat c = ex*fy-ey*fx;
#if (IND & I810_TWOSIDE_BIT)
{
GLuint facing = (c>0.0) ^ ctx->Polygon.FrontBit;
GLubyte (*vbcolor)[4] = VB->Color[facing]->data;
if (IND & I810_FLAT_BIT) {
I810_COLOR((char *)&c0,vbcolor[pv]);
c2 = c1 = c0;
} else {
I810_COLOR((char *)&c0,vbcolor[e0]);
I810_COLOR((char *)&c1,vbcolor[e1]);
I810_COLOR((char *)&c2,vbcolor[e2]);
}
}
#endif
#if (IND & I810_OFFSET_BIT)
{
if (c * c > 1e-16) {
GLfloat factor = ctx->Polygon.OffsetFactor;
GLfloat ez = v0->z - v2->z;
GLfloat fz = v1->z - v2->z;
GLfloat a = ey*fz-ez*fy;
GLfloat b = ez*fx-ex*fz;
GLfloat ic = 1.0 / c;
GLfloat ac = a * ic;
GLfloat bc = b * ic;
if (ac<0.0F) ac = -ac;
if (bc<0.0F) bc = -bc;
offset += MAX2( ac, bc ) * factor;
}
}
#endif
}
#endif
{
i810_vertex *wv = i810AllocTriangles( imesa, 1 );
wv[0] = *v0;
#if (IND & (I810_FLAT_BIT|I810_TWOSIDE_BIT))
*((int *)(&wv[0].color)) = c0;
#endif
#if (IND & I810_OFFSET_BIT)
wv[0].z = v0->z + offset;
#endif
wv[1] = *v1;
#if (IND & (I810_FLAT_BIT|I810_TWOSIDE_BIT))
*((int *)(&wv[1].color)) = c1;
#endif
#if (IND & I810_OFFSET_BIT)
wv[1].z = v1->z + offset;
#endif
wv[2] = *v2;
#if (IND & (I810_FLAT_BIT|I810_TWOSIDE_BIT))
*((int *)(&wv[2].color)) = c2;
#endif
#if (IND & I810_OFFSET_BIT)
wv[2].z = v2->z + offset;
#endif
}
}
static void TAG(quad)( GLcontext *ctx, GLuint v0,
GLuint v1, GLuint v2, GLuint v3,
GLuint pv )
{
TAG(triangle)( ctx, v0, v1, v3, pv );
TAG(triangle)( ctx, v1, v2, v3, pv );
}
static void TAG(line)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint pv )
{
i810ContextPtr imesa = I810_CONTEXT( ctx );
i810VertexPtr i810VB = I810_DRIVER_DATA(ctx->VB)->verts;
int tmp0, tmp1;
(void) tmp0; (void) tmp1;
if (IND & I810_FLAT_BIT) {
tmp0 = *(int *)&i810VB[v0].v.color;
tmp1 = *(int *)&i810VB[v1].v.color;
i810VB[v0].v.color = i810VB[pv].v.color;
i810VB[v1].v.color = i810VB[pv].v.color;
}
if (IND & I810_WIDE_LINE_BIT)
{
i810_draw_tri_line( imesa, &i810VB[v0].v, &i810VB[v1].v,
ctx->Line.Width );
}
else
{
i810_draw_line_line( imesa, &i810VB[v0].v, &i810VB[v1].v );
}
if (IND & I810_FLAT_BIT) {
*(int *)&i810VB[v0].v.color = tmp0;
*(int *)&i810VB[v1].v.color = tmp1;
}
}
static void TAG(points)( GLcontext *ctx, GLuint first, GLuint last )
{
i810ContextPtr imesa = I810_CONTEXT( ctx );
struct vertex_buffer *VB = ctx->VB;
i810VertexPtr i810VB = I810_DRIVER_DATA(VB)->verts;
GLfloat sz = ctx->Point.Size * .5;
int i;
/* Culling is disabled automatically via. the
* ctx->Driver.ReducedPrimitiveChange() callback.
*/
for(i=first;i<=last;i++) {
if(VB->ClipMask[i]==0) {
i810_vertex *tmp = &i810VB[i].v;
i810_draw_point( imesa, tmp, sz );
}
}
}
static void TAG(init)( void )
{
tri_tab[IND] = TAG(triangle);
quad_tab[IND] = TAG(quad);
line_tab[IND] = TAG(line);
points_tab[IND] = TAG(points);
}
#undef IND
#undef TAG
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