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static void FUNC( struct draw_pt_front_end *frontend,
pt_elt_func get_elt,
const void *elts,
int elt_bias,
unsigned count )
{
struct vcache_frontend *vcache = (struct vcache_frontend *)frontend;
struct draw_context *draw = vcache->draw;
boolean flatfirst = (draw->rasterizer->flatshade &&
draw->rasterizer->flatshade_first);
unsigned i;
ushort flags;
if (0) debug_printf("%s %d\n", __FUNCTION__, count);
switch (vcache->input_prim) {
case PIPE_PRIM_POINTS:
for (i = 0; i < count; i ++) {
POINT( vcache,
get_elt(elts, i + 0) + elt_bias );
}
break;
case PIPE_PRIM_LINES:
for (i = 0; i+1 < count; i += 2) {
LINE( vcache,
DRAW_PIPE_RESET_STIPPLE,
get_elt(elts, i + 0) + elt_bias,
get_elt(elts, i + 1) + elt_bias);
}
break;
case PIPE_PRIM_LINE_LOOP:
if (count >= 2) {
flags = DRAW_PIPE_RESET_STIPPLE;
for (i = 1; i < count; i++, flags = 0) {
LINE( vcache,
flags,
get_elt(elts, i - 1) + elt_bias,
get_elt(elts, i ) + elt_bias);
}
LINE( vcache,
flags,
get_elt(elts, i - 1) + elt_bias,
get_elt(elts, 0 ) + elt_bias);
}
break;
case PIPE_PRIM_LINE_STRIP:
flags = DRAW_PIPE_RESET_STIPPLE;
for (i = 1; i < count; i++, flags = 0) {
LINE( vcache,
flags,
get_elt(elts, i - 1) + elt_bias,
get_elt(elts, i ) + elt_bias);
}
break;
case PIPE_PRIM_TRIANGLES:
for (i = 0; i+2 < count; i += 3) {
TRIANGLE( vcache,
DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
get_elt(elts, i + 0) + elt_bias,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 2 ) + elt_bias);
}
break;
case PIPE_PRIM_TRIANGLE_STRIP:
if (flatfirst) {
for (i = 0; i+2 < count; i++) {
TRIANGLE( vcache,
DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
get_elt(elts, i + 0) + elt_bias,
get_elt(elts, i + 1 + (i&1)) + elt_bias,
get_elt(elts, i + 2 - (i&1)) + elt_bias);
}
}
else {
for (i = 0; i+2 < count; i++) {
TRIANGLE( vcache,
DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
get_elt(elts, i + 0 + (i&1)) + elt_bias,
get_elt(elts, i + 1 - (i&1)) + elt_bias,
get_elt(elts, i + 2 ) + elt_bias);
}
}
break;
case PIPE_PRIM_TRIANGLE_FAN:
if (count >= 3) {
if (flatfirst) {
for (i = 0; i+2 < count; i++) {
TRIANGLE( vcache,
DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 2) + elt_bias,
get_elt(elts, 0 ) + elt_bias);
}
}
else {
for (i = 0; i+2 < count; i++) {
TRIANGLE( vcache,
DRAW_PIPE_RESET_STIPPLE | DRAW_PIPE_EDGE_FLAG_ALL,
get_elt(elts, 0) + elt_bias,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 2 ) + elt_bias);
}
}
}
break;
case PIPE_PRIM_QUADS:
for (i = 0; i+3 < count; i += 4) {
QUAD( vcache,
get_elt(elts, i + 0) + elt_bias,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 2) + elt_bias,
get_elt(elts, i + 3) + elt_bias );
}
break;
case PIPE_PRIM_QUAD_STRIP:
for (i = 0; i+3 < count; i += 2) {
QUAD( vcache,
get_elt(elts, i + 2) + elt_bias,
get_elt(elts, i + 0) + elt_bias,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 3) + elt_bias );
}
break;
case PIPE_PRIM_POLYGON:
{
/* These bitflags look a little odd because we submit the
* vertices as (1,2,0) to satisfy flatshade requirements.
*/
const ushort edge_first = DRAW_PIPE_EDGE_FLAG_2;
const ushort edge_middle = DRAW_PIPE_EDGE_FLAG_0;
const ushort edge_last = DRAW_PIPE_EDGE_FLAG_1;
ushort edge_next, edge_finish;
if (flatfirst) {
flags = DRAW_PIPE_RESET_STIPPLE | edge_middle | edge_last;
edge_next = edge_last;
edge_finish = edge_first;
}
else {
flags = DRAW_PIPE_RESET_STIPPLE | edge_first | edge_middle;
edge_next = edge_middle;
edge_finish = edge_last;
}
for (i = 0; i+2 < count; i++, flags = edge_next) {
if (i + 3 == count)
flags |= edge_finish;
if (flatfirst) {
TRIANGLE( vcache,
flags,
get_elt(elts, 0) + elt_bias,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 2) + elt_bias );
}
else {
TRIANGLE( vcache,
flags,
get_elt(elts, i + 1) + elt_bias,
get_elt(elts, i + 2) + elt_bias,
get_elt(elts, 0) + elt_bias);
}
}
}
break;
default:
assert(0);
break;
}
vcache_flush( vcache );
}
#undef TRIANGLE
#undef QUAD
#undef POINT
#undef LINE
#undef FUNC
|
