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https://github.com/ultimatepp/ultimatepp.git
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45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
#include <CtrlLib/CtrlLib.h>
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using namespace Upp;
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Image ScreenShot(int x, int y, int cx, int cy)
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{
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HDC dcScreen = CreateDC("DISPLAY", NULL, NULL, NULL);
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RGBA *pixels;
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Buffer<byte> data;
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data.Alloc(sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD)*256);
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BITMAPINFOHEADER *hi = (BITMAPINFOHEADER *) ~data;;
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memset(hi, 0, sizeof(BITMAPINFOHEADER));
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hi->biSize = sizeof(BITMAPINFOHEADER);
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hi->biPlanes = 1;
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hi->biBitCount = 32;
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hi->biCompression = BI_RGB;
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hi->biSizeImage = 0;
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hi->biClrUsed = 0;
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hi->biClrImportant = 0;
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hi->biWidth = cx;
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hi->biHeight = -cy;
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HBITMAP hbmp = CreateDIBSection(dcScreen, (BITMAPINFO *)hi, DIB_RGB_COLORS, (void **)&pixels, NULL, 0);
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HDC dcMem = ::CreateCompatibleDC(dcScreen);
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HBITMAP hbmpOld = (HBITMAP) ::SelectObject(dcMem, hbmp);
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HDC hdcCompatible = CreateCompatibleDC(dcScreen);
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::BitBlt(dcMem, 0, 0, cx, cy, dcScreen, x, y, SRCCOPY);
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ImageBuffer ib(cx, cy);
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memcpy(~ib, pixels, cx * cy * sizeof(RGBA));
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::DeleteObject(::SelectObject(dcMem, hbmpOld));
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::DeleteDC(dcMem);
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::DeleteDC(dcScreen);
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return ib;
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};
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GUI_APP_MAIN
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{
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Image m = ScreenShot(100, 100, 300, 300);
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PNGEncoder().SaveFile("u:/test.png", m);
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}
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