1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/* 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-pendingscreenchanges.h"
#include <cassert>
#include <mint/falcon.h>
#include "backends/platform/atari/atari-debug.h"
#include "graphics/surface.h"
#include "atari-graphics.h"
#include "atari-graphics-superblitter.h"
void PendingScreenChanges::queueAll() {
_changes |= kAll;
if (_manager->_tt)
_changes &= ~kAspectRatioCorrection;
}
/*
* VsetRGB() - stores the palette in a buffer and applyBeforeVblLock in nearest VBL
* EsetPalette() - immediatelly applies the palette
* (V)SetScreen() - immediatelly sets physbase/logbase but explicitly calls Vsync() for resolution changes
* VsetMode() - explicitly calls Vsync()
*/
void PendingScreenChanges::applyBeforeVblLock() {
_resetSuperVidel = false;
_switchToBlackPalette = (_changes & kVideoMode);
_aspectRatioCorrectionYOffset.second = false;
_setScreenOffsets.second = false;
_shrinkVidelVisibleArea.second = false;
if (_changes & kAspectRatioCorrection) {
processAspectRatioCorrection();
_changes &= ~kAspectRatioCorrection;
}
_switchToBlackPalette |= _resetSuperVidel;
if (_changes & kVideoMode) {
processVideoMode();
// don't reset kVideoMode yet
}
}
void PendingScreenChanges::applyAfterVblLock() {
// VBL doesn't process new palette nor screen address updates
if (_changes & kShakeScreen) {
_setScreenOffsets = std::make_pair(true, true);
_changes &= ~kShakeScreen;
}
// restore current (kVideoMode) or set new (kPalette) palette
if (_changes & (kVideoMode | kPalette)) {
if (_switchToBlackPalette || (_changes & kPalette)) {
if (_manager->_tt) {
if (_changes & kPalette)
Vsync();
EsetPalette(0, _manager->isOverlayVisible() ? _manager->getOverlayPaletteSize() : 256, _manager->_workScreen->palette->tt);
} else {
VsetRGB(0, _manager->isOverlayVisible() ? _manager->getOverlayPaletteSize() : 256, _manager->_workScreen->palette->falcon);
if (_changes & kPalette)
Vsync();
}
}
_changes &= ~(kVideoMode | kPalette);
}
assert(_changes == kNone);
}
void PendingScreenChanges::processAspectRatioCorrection() {
assert(!_manager->_tt);
if (_manager->_aspectRatioCorrection && _manager->_currentState.height == 200 && !_manager->isOverlayVisible()) {
// apply machine-specific aspect ratio correction
if (!_manager->_vgaMonitor) {
_manager->_workScreen->mode &= ~PAL;
// 60 Hz
_manager->_workScreen->mode |= NTSC;
_changes |= kVideoMode;
} else {
_aspectRatioCorrectionYOffset =
std::make_pair((_manager->_workScreen->surf.h - 2*MAX_V_SHAKE - _manager->_workScreen->offsettedSurf->h) / 2, true);
_shrinkVidelVisibleArea = std::make_pair(true, true);
}
} else {
// reset back to default mode
if (!_manager->_vgaMonitor) {
_manager->_workScreen->mode &= ~NTSC;
// 50 Hz
_manager->_workScreen->mode |= PAL;
_changes |= kVideoMode;
} else {
_aspectRatioCorrectionYOffset = std::make_pair(0, true);
_shrinkVidelVisibleArea = std::make_pair(false, true);
if (hasSuperVidel())
_resetSuperVidel = true;
// kPendingVideoMode will reset the shrunken Videl area
_changes |= kVideoMode;
}
}
// for VsetMode() and/or _aspectRatioCorrectionYOffset
_setScreenOffsets = std::make_pair(true, true);
}
void PendingScreenChanges::processVideoMode() {
// changing video mode implies an additional Vsync(): there's no way to change resolution
// and set new screen address (and/or shake offsets etc) in one go
if (_manager->_workScreen->rez != -1) {
if (_switchToBlackPalette) {
static uint16 black[256];
EsetPalette(0, _manager->isOverlayVisible() ? _manager->getOverlayPaletteSize() : 256, black);
}
// unfortunately this reinitializes VDI, too
Setscreen(SCR_NOCHANGE, SCR_NOCHANGE, _manager->_workScreen->rez);
} else if (_manager->_workScreen->mode != -1) {
if (_switchToBlackPalette) {
static _RGB black[256];
VsetRGB(0, _manager->isOverlayVisible() ? _manager->getOverlayPaletteSize() : 256, black);
}
// VsetMode() must be called first: it resets all hz/v, scrolling and line width registers
if (_resetSuperVidel)
VsetMode(SVEXT | SVEXT_BASERES(0) | COL80 | BPS8C); // resync to proper 640x480
atari_debug("VsetMode: %04x", _manager->_workScreen->mode);
VsetMode(_manager->_workScreen->mode);
}
}
|
