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
|
/* 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 process it in the nearest non-locked 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(const Screen &screen) {
_mode = screen.mode; // avoid modifying 'Screen' content
_resetSuperVidel = false;
_aspectRatioCorrectionYOffset.second = false;
_setScreenOffsets.second = false;
_shrinkVidelVisibleArea.second = false;
if (_changes & kAspectRatioCorrection) {
processAspectRatioCorrection(screen);
_changes &= ~kAspectRatioCorrection;
}
_switchToBlackPalette = (_changes & kVideoMode) || _resetSuperVidel;
if (_changes & kVideoMode) {
processVideoMode(screen);
// don't reset kVideoMode yet
}
}
void PendingScreenChanges::applyAfterVblLock(const Screen &screen) {
// VBL doesn't process new palette nor screen address updates
// if _changes & kVideoMode then the Vsync handler has just returned
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)) {
// Set the palette as fast as possible. Vsync() is a big no-no, updateScreen() and
// therefore this function can be called multiple times per frame. In this case,
// EsetPalette() will set the colours immediately (oops) but VsetRGB() is fine:
// it will be set as soon as VBL is unlocked again.
if (_manager->_tt) {
EsetPalette(0, screen.palette->entries, screen.palette->tt);
} else {
VsetRGB(0, screen.palette->entries, screen.palette->falcon);
}
}
_changes &= ~(kVideoMode | kPalette);
}
assert(_changes == kNone);
}
void PendingScreenChanges::processAspectRatioCorrection(const Screen &screen) {
assert(!_manager->_tt);
assert(_mode != -1);
if (_manager->_aspectRatioCorrection && _manager->_currentState.height == 200 && !_manager->isOverlayVisible()) {
// apply machine-specific aspect ratio correction
if (!_manager->_vgaMonitor) {
_mode &= ~PAL;
// 60 Hz
_mode |= NTSC;
_changes |= kVideoMode;
} else {
_aspectRatioCorrectionYOffset =
std::make_pair((screen.surf.h - 2*MAX_V_SHAKE - screen.offsettedSurf->h) / 2, true);
_shrinkVidelVisibleArea = std::make_pair(true, true);
}
} else {
// reset back to default mode
if (!_manager->_vgaMonitor) {
_mode &= ~NTSC;
// 50 Hz
_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(const Screen &screen) {
// 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 (screen.rez != -1) {
static uint16 black[256];
EsetPalette(0, screen.palette->entries, black);
// unfortunately this reinitializes VDI, too
Setscreen(SCR_NOCHANGE, SCR_NOCHANGE, screen.rez);
} else if (_mode != -1) {
static _RGB black[256];
VsetRGB(0, screen.palette->entries, black);
// VsetMode() must be called before the VBL s_ stuff is set as
// 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", _mode);
VsetMode(_mode);
}
}
|
