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[MSPAINT] Speed up for black and white (#5563)

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Follow-up to #5554.
- Speed up ImageModel::PushBlackAndWhite
  by using GetDIBits and SetDIBits.
CORE-19094
This commit is contained in:
Katayama Hirofumi MZ 2023-08-20 16:46:18 +09:00 • committed by GitHub
parent 49dbc8fbbb
commit 455c1fe1b9
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 104 additions and 35 deletions
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93
base/applications/mspaint/dib.cpp
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@ -13,6 +13,13 @@ float g_xDpi = 96;
float g_yDpi = 96;
SYSTEMTIME g_fileTime;
#define WIDTHBYTES(i) (((i) + 31) / 32 * 4)
struct BITMAPINFOEX : BITMAPINFO
{
RGBQUAD bmiColorsExtra[256 - 1];
};
/* FUNCTIONS ********************************************************/
// Convert DPI (dots per inch) into PPCM (pixels per centimeter)
@ -519,3 +526,89 @@ HBITMAP BitmapFromHEMF(HENHMETAFILE hEMF)
return hbm;
}
BOOL IsBitmapBlackAndWhite(HBITMAP hbm)
{
BITMAP bm;
if (!::GetObjectW(hbm, sizeof(bm), &bm))
return FALSE;
if (bm.bmBitsPixel == 1)
return TRUE;
BITMAPINFOEX bmi;
ZeroMemory(&bmi, sizeof(bmi));
bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
bmi.bmiHeader.biWidth = bm.bmWidth;
bmi.bmiHeader.biHeight = bm.bmHeight;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 24;
DWORD widthbytes = WIDTHBYTES(24 * bm.bmWidth);
DWORD cbBits = widthbytes * bm.bmHeight;
LPBYTE pbBits = new BYTE[cbBits];
HDC hdc = ::CreateCompatibleDC(NULL);
::GetDIBits(hdc, hbm, 0, bm.bmHeight, pbBits, &bmi, DIB_RGB_COLORS);
::DeleteDC(hdc);
BOOL bBlackAndWhite = TRUE;
for (LONG y = 0; y < bm.bmHeight; ++y)
{
LPBYTE pbLine = &pbBits[widthbytes * y];
for (LONG x = 0; x < bm.bmWidth; ++x)
{
BYTE Blue = *pbLine++;
BYTE Green = *pbLine++;
BYTE Red = *pbLine++;
COLORREF rgbColor = RGB(Red, Green, Blue);
if (rgbColor != RGB(0, 0, 0) && rgbColor != RGB(255, 255, 255))
{
bBlackAndWhite = FALSE;
goto Finish;
}
}
}
Finish:
delete[] pbBits;
return bBlackAndWhite;
}
HBITMAP ConvertToBlackAndWhite(HBITMAP hbm)
{
BITMAP bm;
if (!::GetObject(hbm, sizeof(bm), &bm))
return NULL;
BITMAPINFOEX bmi;
ZeroMemory(&bmi, sizeof(bmi));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = bm.bmWidth;
bmi.bmiHeader.biHeight = bm.bmHeight;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 1;
bmi.bmiColors[1].rgbBlue = 255;
bmi.bmiColors[1].rgbGreen = 255;
bmi.bmiColors[1].rgbRed = 255;
HDC hdc = ::CreateCompatibleDC(NULL);
LPVOID pvMonoBits;
HBITMAP hMonoBitmap = ::CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, &pvMonoBits, NULL, 0);
if (!hMonoBitmap)
{
::DeleteDC(hdc);
return NULL;
}
HBITMAP hNewBitmap = CreateDIBWithProperties(bm.bmWidth, bm.bmHeight);
if (hNewBitmap)
{
::GetDIBits(hdc, hbm, 0, bm.bmHeight, pvMonoBits, &bmi, DIB_RGB_COLORS);
::SetDIBits(hdc, hNewBitmap, 0, bm.bmHeight, pvMonoBits, &bmi, DIB_RGB_COLORS);
}
::DeleteObject(hMonoBitmap);
::DeleteDC(hdc);
return hNewBitmap;
}