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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#include "hsTypes.h"
#include "plLoadMask.h"
#include "hsStream.h"
#include "hsTemplates.h"
#include "plQuality.h"
///////////////////////////////////////////////////////////////////
// Global settings first. Implemented here for convenience (mine).
// They could go in pnSingletons, but they require LoadMask to link
// (and compile) anyway. Mostly, I just wanted the plQuality interface
// in its own header file so you would know to include plQuality.h
// to get plQuality::Func, rather than the less obvious plLoadMask.h.
///////////////////////////////////////////////////////////////////
int plQuality::fQuality = 0;
int plQuality::fCapability = 0;
void plQuality::SetQuality(int q)
{
fQuality = q;
plLoadMask::SetGlobalQuality(q);
}
// Set by the pipeline according to platform capabilities.
void plQuality::SetCapability(int c)
{
fCapability = c;
plLoadMask::SetGlobalCapability(c);
}
///////////////////////////////////////////////////////////////////
// Now the LoadMask implementation.
///////////////////////////////////////////////////////////////////
const plLoadMask plLoadMask::kAlways;
UInt8 plLoadMask::fGlobalQuality = UInt8(1);
UInt8 plLoadMask::fGlobalCapability = UInt8(0);
void plLoadMask::Read(hsStream* s)
{
// read as packed byte
UInt8 qc;
s->LogReadSwap(&qc,"Quality|Capabilty");
fQuality[0] = (qc & 0xf0) >> 4;
fQuality[1] = (qc & 0x0f);
// Or in the bits we stripped on write, or else IsUsed() won't work.
fQuality[0] |= 0xf0;
fQuality[1] |= 0xf0;
}
void plLoadMask::Write(hsStream* s) const
{
// write packed into 1 byte
UInt8 qc = (fQuality[0]<<4) | (fQuality[1] & 0xf);
s->WriteSwap(qc);
}
UInt32 plLoadMask::ValidateReps(int num, const int quals[], const int caps[])
{
UInt32 retVal = 0;
int i;
for( i = 1; i < num; i++ )
{
int j;
for( j = 0; j < i; j++ )
{
if( (quals[i] >= quals[j]) && (caps[i] >= caps[j]) )
{
// Bogus, this would double load.
retVal |= (1 << i);
}
}
}
return retVal;
}
UInt32 plLoadMask::ValidateMasks(int num, plLoadMask masks[])
{
UInt32 retVal = 0;
int i;
for( i = 0; i < num; i++ )
{
if( !masks[i].fQuality[0] && !masks[i].fQuality[1] )
retVal |= (1 << i);
int j;
for( j = 0; j < i; j++ )
{
int k;
for( k = 0; k <= kMaxCap; k++ )
{
if( masks[i].fQuality[k] & masks[j].fQuality[k] )
{
masks[i].fQuality[k] &= ~masks[j].fQuality[k];
retVal |= (1 << i);
}
}
}
}
return retVal;
}
hsBool plLoadMask::ComputeRepMasks(
int num,
const int quals[],
const int caps[],
plLoadMask masks[])
{
hsBool retVal = false; // Okay till proven otherwise.
int i;
for( i = 0; i < num; i++ )
{
int k;
for( k = 0; k <= kMaxCap; k++ )
{
// Q starts off the bits higher than or equal to 1 << qual.
// I.e. we just turned off all lower quality bits.
UInt8 q = ~( (1 << quals[i]) - 1 );
// For this cap level, if we require higher caps,
// turn off our quality (i.e. we won't load at this
// cap for any quality setting.
UInt8 c = caps[i] > kMaxCap ? kMaxCap : caps[i];
if( c > k )
q = 0;
// Turn off all bits already covered for this cap level
// so we never double load.
int j;
for( j = 0; j < i; j++ )
{
q &= ~masks[j].fQuality[k];
}
masks[i].fQuality[k] = q;
}
if( masks[i].NeverLoads() )
retVal = true;
}
return retVal;
}