-
Notifications
You must be signed in to change notification settings - Fork 0
/
WindowsApi.cpp
178 lines (141 loc) · 5.3 KB
/
WindowsApi.cpp
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
172
173
174
175
176
177
178
#include "WindowsApi.h"
HBITMAP WindowsApi::convertCVMat2BMP(cv::Mat frame) {
// https://gist.github.com/AhiyaHiya/6e455a3a6c846766f1017044131bfab7
auto convertOpenCVBitDepthToBits = [](const int32_t value) {
auto regular = 0u;
switch (value) {
case CV_8U:
case CV_8S:
regular = 8u;
break;
case CV_16U:
case CV_16S:
regular = 16u;
break;
case CV_32S:
case CV_32F:
regular = 32u;
break;
case CV_64F:
regular = 64u;
break;
default:
regular = 0u;
break;
}
return regular;
};
auto imageSize = frame.size();
assert(imageSize.width && "invalid size provided by frame");
assert(imageSize.height && "invalid size provided by frame");
if (imageSize.width && imageSize.height) {
auto headerInfo = BITMAPINFOHEADER{};
ZeroMemory(&headerInfo, sizeof(headerInfo));
headerInfo.biSize = sizeof(headerInfo);
headerInfo.biWidth = imageSize.width;
headerInfo.biHeight = -(imageSize.height); // negative otherwise it will be upsidedown
headerInfo.biPlanes = 1; // must be set to 1 as per documentation frame.channels();
const auto bits = convertOpenCVBitDepthToBits(frame.depth());
headerInfo.biBitCount = frame.channels() * bits;
auto bitmapInfo = BITMAPINFO{};
ZeroMemory(&bitmapInfo, sizeof(bitmapInfo));
bitmapInfo.bmiHeader = headerInfo;
bitmapInfo.bmiColors->rgbBlue = 0;
bitmapInfo.bmiColors->rgbGreen = 0;
bitmapInfo.bmiColors->rgbRed = 0;
bitmapInfo.bmiColors->rgbReserved = 0;
auto dc = GetDC(nullptr);
assert(dc != nullptr && "Failure to get DC");
auto bmp = CreateDIBitmap(dc,
&headerInfo,
CBM_INIT,
frame.data,
&bitmapInfo,
DIB_RGB_COLORS);
assert(bmp != nullptr && "Failure creating bitmap from captured frame");
return bmp;
} else {
return nullptr;
}
}
void WindowsApi::getScreenshot2CVMat(Mat& img) {
// основано на https://stackoverflow.com/questions/34466993/opencv-desktop-capture/36696070#36696070
// и основано на https://stackoverflow.com/questions/3291167/how-can-i-take-a-screenshot-in-a-windows-application
//-------- getting screenshot --------
int x1, y1, x2, y2, w, h;
// get screen dimensions
x1 = GetSystemMetrics(SM_XVIRTUALSCREEN);
y1 = GetSystemMetrics(SM_YVIRTUALSCREEN);
x2 = GetSystemMetrics(SM_CXVIRTUALSCREEN);
y2 = GetSystemMetrics(SM_CYVIRTUALSCREEN);
w = x2 - x1;
h = y2 - y1;
w *= DISPLAY_SCALE;
h *= DISPLAY_SCALE;
// copy screen to bitmap
HDC hScreen = GetDC(NULL);
HDC hDC = CreateCompatibleDC(hScreen);
HBITMAP hBitmap = CreateCompatibleBitmap(hScreen, w, h);
HGDIOBJ old_obj = SelectObject(hDC, hBitmap);
BOOL bRet = BitBlt(hDC, 0, 0, w, h, hScreen, x1, y1, SRCCOPY);
BITMAPINFOHEADER bi;
Mat src;
if (src.empty() || src.type() != CV_8UC4 || src.cols != w || src.rows != h) {
src.create(h, w, CV_8UC4);
}
if (img.empty() || img.type() != CV_8UC3 || img.cols != w || img.rows != h) {
img.create(h, w, CV_8UC3);
}
// create a bitmap
bi.biSize = sizeof(BITMAPINFOHEADER); // http://msdn.microsoft.com/en-us/library/windows/window/dd183402%28v=vs.85%29.aspx
bi.biWidth = w;
bi.biHeight = -h; // this is the line that makes it draw upside down or not
bi.biPlanes = 1;
bi.biBitCount = 32;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
// use the previously created device context with the bitmap
SelectObject(hDC, hBitmap);
// copy from the window device context to the bitmap device context
StretchBlt(hDC, 0, 0, w, h, hScreen, 0, 0, w, h, SRCCOPY); // change SRCCOPY to NOTSRCCOPY for wacky colors !
GetDIBits(hDC, hBitmap, 0, h, src.data, (BITMAPINFO*)&bi, DIB_RGB_COLORS); // copy from hwindowCompatibleDC to hbwindow
// clean up
SelectObject(hDC, old_obj);
DeleteDC(hDC);
ReleaseDC(NULL, hScreen);
DeleteObject(hBitmap);
cvtColor(src, img, COLOR_BGRA2BGR);
}
void WindowsApi::pressSpace() {
// based on:
// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-sendinput
// https://batchloaf.wordpress.com/2012/04/17/simulating-a-keystroke-in-win32-c-or-c-using-sendinput/
INPUT ip;
ip.type = INPUT_KEYBOARD;
ip.ki.wVk = VK_SPACE;
ip.ki.dwFlags = 0;
//ip.ki.dwFlags = KEYEVENTF_KEYUP;
UINT uSent = SendInput(1, &ip, sizeof(INPUT));
}
void WindowsApi::unpressSpace() {
INPUT ip;
ip.type = INPUT_KEYBOARD;
ip.ki.wVk = VK_SPACE;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
UINT uSent = SendInput(1, &ip, sizeof(INPUT));
}
bool WindowsApi::isCtrlPressed() {
SHORT state = GetKeyState(VK_RCONTROL);
return (state < 0);
}
bool WindowsApi::isCtrlClicked() {
SHORT state = GetKeyState(VK_RCONTROL);
static bool prevClickState = state % 2;
bool isNewClick = (prevClickState != bool(state % 2));
prevClickState = state % 2;
return isNewClick;
}