68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* 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/>.
|
|
*
|
|
*/
|
|
|
|
#include "atari-supervidel.h"
|
|
|
|
#include "common/scummsys.h"
|
|
|
|
bool g_hasSuperVidel = false;
|
|
|
|
#ifdef USE_SUPERVIDEL
|
|
|
|
#ifdef USE_SV_BLITTER
|
|
int g_superVidelFwVersion = 0;
|
|
const byte *g_blitMask = nullptr;
|
|
|
|
static bool isSuperBlitterLocked;
|
|
|
|
void SyncSuperBlitter() {
|
|
// if externally locked, let the owner decide when to sync (unlock)
|
|
if (isSuperBlitterLocked)
|
|
return;
|
|
|
|
// while FIFO not empty...
|
|
if (g_superVidelFwVersion >= 9)
|
|
while (!(*SV_BLITTER_FIFO & 1));
|
|
// while busy blitting...
|
|
while (*SV_BLITTER_CONTROL & 1);
|
|
}
|
|
#endif // USE_SV_BLITTER
|
|
|
|
void LockSuperBlitter() {
|
|
#ifdef USE_SV_BLITTER
|
|
assert(!isSuperBlitterLocked);
|
|
|
|
isSuperBlitterLocked = true;
|
|
#endif
|
|
}
|
|
|
|
void UnlockSuperBlitter() {
|
|
#ifdef USE_SV_BLITTER
|
|
assert(isSuperBlitterLocked);
|
|
|
|
isSuperBlitterLocked = false;
|
|
if (g_hasSuperVidel)
|
|
SyncSuperBlitter();
|
|
#endif
|
|
}
|
|
|
|
#endif // USE_SUPERVIDEL
|