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
159
160
161
162
163
164
165
166
167
168
169
170
171
|
#include <ddraw.h>
struct VideoDD : Video {
~VideoDD() { term(); }
LPDIRECTDRAW lpdd = nullptr;
LPDIRECTDRAW7 lpdd7 = nullptr;
LPDIRECTDRAWSURFACE7 screen = nullptr;
LPDIRECTDRAWSURFACE7 raster = nullptr;
LPDIRECTDRAWCLIPPER clipper = nullptr;
DDSURFACEDESC2 ddsd;
DDSCAPS2 ddscaps;
unsigned iwidth;
unsigned iheight;
struct {
HWND handle = nullptr;
bool synchronize = false;
unsigned width;
unsigned height;
} settings;
auto cap(const string& name) -> bool {
if(name == Video::Handle) return true;
if(name == Video::Synchronize) return true;
return false;
}
auto get(const string& name) -> any {
if(name == Video::Handle) return (uintptr_t)settings.handle;
if(name == Video::Synchronize) return settings.synchronize;
return {};
}
auto set(const string& name, const any& value) -> bool {
if(name == Video::Handle && value.is<uintptr_t>()) {
settings.handle = (HWND)value.get<uintptr_t>();
return true;
}
if(name == Video::Synchronize && value.is<bool>()) {
settings.synchronize = value.get<bool>();
return true;
}
return false;
}
auto resize(unsigned width, unsigned height) -> void {
if(iwidth >= width && iheight >= height) return;
iwidth = max(width, iwidth);
iheight = max(height, iheight);
if(raster) raster->Release();
screen->GetSurfaceDesc(&ddsd);
int depth = ddsd.ddpfPixelFormat.dwRGBBitCount;
if(depth == 32) goto try_native_surface;
memset(&ddsd, 0, sizeof(DDSURFACEDESC2));
ddsd.dwSize = sizeof(DDSURFACEDESC2);
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_VIDEOMEMORY; //DDSCAPS_SYSTEMMEMORY
ddsd.dwWidth = iwidth;
ddsd.dwHeight = iheight;
ddsd.ddpfPixelFormat.dwSize = sizeof(DDPIXELFORMAT);
ddsd.ddpfPixelFormat.dwFlags = DDPF_RGB;
ddsd.ddpfPixelFormat.dwRGBBitCount = 32;
ddsd.ddpfPixelFormat.dwRBitMask = 0xff0000;
ddsd.ddpfPixelFormat.dwGBitMask = 0x00ff00;
ddsd.ddpfPixelFormat.dwBBitMask = 0x0000ff;
if(lpdd7->CreateSurface(&ddsd, &raster, 0) == DD_OK) return clear();
try_native_surface:
memset(&ddsd, 0, sizeof(DDSURFACEDESC2));
ddsd.dwSize = sizeof(DDSURFACEDESC2);
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_VIDEOMEMORY; //DDSCAPS_SYSTEMMEMORY
ddsd.dwWidth = iwidth;
ddsd.dwHeight = iheight;
if(lpdd7->CreateSurface(&ddsd, &raster, 0) == DD_OK) return clear();
}
auto clear() -> void {
DDBLTFX fx;
fx.dwSize = sizeof(DDBLTFX);
fx.dwFillColor = 0x00000000;
screen->Blt(0, 0, 0, DDBLT_WAIT | DDBLT_COLORFILL, &fx);
raster->Blt(0, 0, 0, DDBLT_WAIT | DDBLT_COLORFILL, &fx);
}
auto lock(uint32_t*& data, unsigned& pitch, unsigned width, unsigned height) -> bool {
if(width != settings.width || height != settings.height) {
resize(settings.width = width, settings.height = height);
}
if(raster->Lock(0, &ddsd, DDLOCK_WAIT, 0) != DD_OK) {
raster->Restore();
if(raster->Lock(0, &ddsd, DDLOCK_WAIT, 0) != DD_OK) return false;
}
pitch = ddsd.lPitch;
return data = (uint32_t*)ddsd.lpSurface;
}
auto unlock() -> void {
raster->Unlock(0);
}
auto refresh() -> void {
if(settings.synchronize) {
while(true) {
BOOL in_vblank;
lpdd7->GetVerticalBlankStatus(&in_vblank);
if(in_vblank == true) break;
}
}
HRESULT hr;
RECT rd, rs;
SetRect(&rs, 0, 0, settings.width, settings.height);
POINT p = {0, 0};
ClientToScreen(settings.handle, &p);
GetClientRect(settings.handle, &rd);
OffsetRect(&rd, p.x, p.y);
if(screen->Blt(&rd, raster, &rs, DDBLT_WAIT, 0) == DDERR_SURFACELOST) {
screen->Restore();
raster->Restore();
}
}
auto init() -> bool {
DirectDrawCreate(0, &lpdd, 0);
lpdd->QueryInterface(IID_IDirectDraw7, (void**)&lpdd7);
if(lpdd) { lpdd->Release(); lpdd = 0; }
lpdd7->SetCooperativeLevel(settings.handle, DDSCL_NORMAL);
memset(&ddsd, 0, sizeof(DDSURFACEDESC2));
ddsd.dwSize = sizeof(DDSURFACEDESC2);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
lpdd7->CreateSurface(&ddsd, &screen, 0);
lpdd7->CreateClipper(0, &clipper, 0);
clipper->SetHWnd(0, settings.handle);
screen->SetClipper(clipper);
raster = 0;
iwidth = 0;
iheight = 0;
resize(settings.width = 256, settings.height = 256);
return true;
}
auto term() -> void {
if(clipper) { clipper->Release(); clipper = 0; }
if(raster) { raster->Release(); raster = 0; }
if(screen) { screen->Release(); screen = 0; }
if(lpdd7) { lpdd7->Release(); lpdd7 = 0; }
if(lpdd) { lpdd->Release(); lpdd = 0; }
}
};
|
