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