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/* Build an SWvertex from an tdfxVertex. This is workable because in
* states where the GrVertex is insufficent (eg seperate-specular),
* the driver initiates a total fallback, and builds SWvertices
* directly -- it recognizes that it will never have use for the
* tdfxVertex.
*
* This code is hit only when a mix of accelerated and unaccelerated
* primitives are being drawn, and only for the unaccelerated
* primitives.
*/
static void
tdfx_translate_vertex(GLcontext *ctx, const tdfxVertex *src, SWvertex *dst)
{
tdfxContextPtr imesa = TDFX_CONTEXT( ctx );
if (imesa->vertsize == 4) {
dst->win[0] = src->tv.x + .5;
dst->win[1] = - src->tv.y + imesa->driDrawable->h - .5;
dst->win[2] = src->tv.z * (GLfloat)0x10000;
dst->win[3] = 1.0;
dst->color[0] = src->tv.color.red;
dst->color[1] = src->tv.color.green;
dst->color[2] = src->tv.color.blue;
dst->color[3] = src->tv.color.alpha;
}
else {
dst->win[0] = src->v.x + .5;
dst->win[1] = - src->v.y + imesa->driDrawable->h - .5;
dst->win[2] = src->v.z * (GLfloat)0x10000;
dst->win[3] = src->v.oow;
dst->color[0] = src->v.color.red;
dst->color[1] = src->v.color.green;
dst->color[2] = src->v.color.blue;
dst->color[3] = src->v.color.alpha;
if (fxMesa->xxx) {
dst->texcoord[0][0] = src->v.tu0;
dst->texcoord[0][1] = src->v.tv0;
dst->texcoord[0][3] = 1.0;
dst->texcoord[1][0] = src->v.tu1;
dst->texcoord[1][1] = src->v.tv1;
dst->texcoord[1][3] = 1.0;
}
else {
dst->texcoord[0][0] = src->pv.u0;
dst->texcoord[0][1] = src->pv.v0;
dst->texcoord[0][3] = src->pv.q0;
dst->texcoord[1][0] = src->pv.u1;
dst->texcoord[1][1] = src->pv.v1;
dst->texcoord[1][3] = src->pv.q1;
}
}
dst->pointSize = ctx->Point._Size;
}
static void
tdfx_fallback_tri( tdfxContextPtr imesa,
tdfxVertex *v0,
tdfxVertex *v1,
tdfxVertex *v2 )
{
GLcontext *ctx = imesa->glCtx;
SWvertex v[3];
tdfx_translate_vertex( ctx, v0, &v[0] );
tdfx_translate_vertex( ctx, v1, &v[1] );
tdfx_translate_vertex( ctx, v2, &v[2] );
_swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
}
static void
tdfx_fallback_line( tdfxContextPtr imesa,
tdfxVertex *v0,
tdfxVertex *v1 )
{
GLcontext *ctx = imesa->glCtx;
SWvertex v[2];
tdfx_translate_vertex( ctx, v0, &v[0] );
tdfx_translate_vertex( ctx, v1, &v[1] );
_swrast_Line( ctx, &v[0], &v[1] );
}
static void
tdfx_fallback_point( tdfxContextPtr imesa,
tdfxVertex *v0 )
{
GLcontext *ctx = imesa->glCtx;
SWvertex v[1];
tdfx_translate_vertex( ctx, v0, &v[0] );
_swrast_Point( ctx, &v[0] );
}
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