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Factor out polymodel swap switch

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This commit is contained in:
Kp 2015-02-28 22:34:06 +00:00
parent 1a0f409648
commit e19237c105
1 changed files with 64 additions and 49 deletions
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113
similar/3d/interp.cpp
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@ -136,6 +136,10 @@ public:
class interpreter_base
{
public:
static uint16_t get_raw_opcode(const uint8_t *const p)
{
return w(p);
}
static uint16_t get_op_subcount(const uint8_t *const p)
{
return w(p + 2);
@ -488,6 +492,61 @@ constexpr const glow_values_t *g3_draw_morphing_model_state::glow_values;
}
template <typename P, typename State>
static std::size_t dispatch_polymodel_op(const P p, State &state, const uint_fast32_t op)
{
switch (op)
{
case OP_DEFPOINTS: {
const auto n = state.get_op_subcount(p);
state.op_defpoints(p, n);
return n * sizeof(vms_vector) + 4;
}
case OP_DEFP_START: {
const auto n = state.get_op_subcount(p);
state.op_defp_start(p, n);
return n * sizeof(vms_vector) + 8;
}
case OP_FLATPOLY: {
const auto n = state.get_op_subcount(p);
state.op_flatpoly(p, n);
return 30 + ((n & ~1) + 1) * 2;
}
case OP_TMAPPOLY: {
const auto n = state.get_op_subcount(p);
state.op_tmappoly(p, n);
return 30 + ((n & ~1) + 1) * 2 + n * 12;
}
case OP_SORTNORM: {
state.op_sortnorm(p);
return 32;
}
case OP_RODBM: {
state.op_rodbm(p);
return 36;
}
case OP_SUBCALL: {
state.op_subcall(p);
return 20;
}
case OP_GLOW: {
state.op_glow(p);
return 4;
}
default:
state.op_default();
return 2;
}
}
template <typename P, typename State>
static P iterate_polymodel(P p, State &state)
{
for (uint16_t op; (op = state.get_raw_opcode(p)) != OP_EOF;)
p += dispatch_polymodel_op(p, state, state.translate_opcode(p, op));
return p;
}
#ifdef WORDS_BIGENDIAN
static void short_swap(short *s)
{
@ -516,6 +575,10 @@ namespace {
class swap_polygon_model_data_state : public interpreter_base
{
public:
static uint_fast32_t translate_opcode(uint8_t *const p, const uint16_t op)
{
return *wp(p) = INTEL_SHORT(op);
}
static uint16_t get_op_subcount(const uint8_t *const p)
{
return SWAPSHORT(w(p + 2));
@ -591,55 +654,7 @@ public:
void swap_polygon_model_data(ubyte *data)
{
swap_polygon_model_data_state state;
uint8_t *p = data;
while (w(p) != OP_EOF) {
short_swap(wp(p));
switch (w(p)) {
case OP_DEFPOINTS: {
const auto n = state.get_op_subcount(p);
state.op_defpoints(p, n);
p += n*sizeof(struct vms_vector) + 4;
break;
}
case OP_DEFP_START: {
const auto n = state.get_op_subcount(p);
state.op_defp_start(p, n);
p += n*sizeof(struct vms_vector) + 8;
break;
}
case OP_FLATPOLY: {
const auto n = state.get_op_subcount(p);
state.op_flatpoly(p, n);
p += 30 + ((n&~1)+1)*2;
break;
}
case OP_TMAPPOLY: {
const auto n = state.get_op_subcount(p);
state.op_tmappoly(p, n);
p += 30 + ((n&~1)+1)*2 + n*12;
break;
}
case OP_SORTNORM:
state.op_sortnorm(p);
p += 32;
break;
case OP_RODBM:
state.op_rodbm(p);
p+=36;
break;
case OP_SUBCALL:
state.op_subcall(p);
p += 20;
break;
case OP_GLOW:
state.op_glow(p);
p += 4;
break;
default:
state.op_default();
break;
}
}
iterate_polymodel(data, state);
}
#endif