mirror of
https://github.com/reactos/reactos.git
synced 2024-12-28 18:15:11 +00:00
668 lines
17 KiB
C++
668 lines
17 KiB
C++
/*
|
|
* PROJECT: PAINT for ReactOS
|
|
* LICENSE: LGPL-2.0-or-later (https://spdx.org/licenses/LGPL-2.0-or-later)
|
|
* PURPOSE: Some DIB related functions
|
|
* COPYRIGHT: Copyright 2015 Benedikt Freisen <b.freisen@gmx.net>
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
|
|
INT g_fileSize = 0;
|
|
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)
|
|
float PpcmFromDpi(float dpi)
|
|
{
|
|
// 1 DPI is 0.0254 meter. 1 centimeter is 1/100 meter.
|
|
return dpi / (0.0254f * 100.0f);
|
|
}
|
|
|
|
HBITMAP
|
|
CreateDIBWithProperties(int width, int height)
|
|
{
|
|
BITMAPINFO bmi;
|
|
ZeroMemory(&bmi, sizeof(BITMAPINFO));
|
|
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
|
|
bmi.bmiHeader.biWidth = width;
|
|
bmi.bmiHeader.biHeight = height;
|
|
bmi.bmiHeader.biPlanes = 1;
|
|
bmi.bmiHeader.biBitCount = 24;
|
|
return CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, NULL, NULL, 0);
|
|
}
|
|
|
|
HBITMAP
|
|
CreateMonoBitmap(int width, int height, BOOL bWhite)
|
|
{
|
|
HBITMAP hbm = CreateBitmap(width, height, 1, 1, NULL);
|
|
if (hbm == NULL)
|
|
return NULL;
|
|
|
|
if (bWhite)
|
|
{
|
|
HDC hdc = CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbmOld = SelectObject(hdc, hbm);
|
|
RECT rc = { 0, 0, width, height };
|
|
FillRect(hdc, &rc, (HBRUSH)GetStockObject(WHITE_BRUSH));
|
|
SelectObject(hdc, hbmOld);
|
|
DeleteDC(hdc);
|
|
}
|
|
|
|
return hbm;
|
|
}
|
|
|
|
HBITMAP
|
|
CreateColorDIB(int width, int height, COLORREF rgb)
|
|
{
|
|
HBITMAP ret = CreateDIBWithProperties(width, height);
|
|
if (!ret)
|
|
return NULL;
|
|
|
|
if (rgb)
|
|
{
|
|
HDC hdc = CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbmOld = SelectObject(hdc, ret);
|
|
RECT rc;
|
|
SetRect(&rc, 0, 0, width, height);
|
|
HBRUSH hbr = CreateSolidBrush(rgb);
|
|
FillRect(hdc, &rc, hbr);
|
|
DeleteObject(hbr);
|
|
SelectObject(hdc, hbmOld);
|
|
DeleteDC(hdc);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
HBITMAP CopyMonoImage(HBITMAP hbm, INT cx, INT cy)
|
|
{
|
|
BITMAP bm;
|
|
if (!::GetObjectW(hbm, sizeof(bm), &bm))
|
|
return NULL;
|
|
|
|
if (cx == 0 || cy == 0)
|
|
{
|
|
cx = bm.bmWidth;
|
|
cy = bm.bmHeight;
|
|
}
|
|
|
|
HBITMAP hbmNew = ::CreateBitmap(cx, cy, 1, 1, NULL);
|
|
if (!hbmNew)
|
|
return NULL;
|
|
|
|
HDC hdc1 = ::CreateCompatibleDC(NULL);
|
|
HDC hdc2 = ::CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbm1Old = ::SelectObject(hdc1, hbm);
|
|
HGDIOBJ hbm2Old = ::SelectObject(hdc2, hbmNew);
|
|
::StretchBlt(hdc2, 0, 0, cx, cy, hdc1, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
|
|
::SelectObject(hdc1, hbm1Old);
|
|
::SelectObject(hdc2, hbm2Old);
|
|
::DeleteDC(hdc1);
|
|
::DeleteDC(hdc2);
|
|
return hbmNew;
|
|
}
|
|
|
|
HBITMAP CachedBufferDIB(HBITMAP hbm, int minimalWidth, int minimalHeight)
|
|
{
|
|
if (minimalWidth <= 0)
|
|
minimalWidth = 1;
|
|
if (minimalHeight <= 0)
|
|
minimalHeight = 1;
|
|
|
|
BITMAP bm;
|
|
if (!GetObjectW(hbm, sizeof(bm), &bm))
|
|
hbm = NULL;
|
|
|
|
if (hbm && minimalWidth <= bm.bmWidth && minimalHeight <= bm.bmHeight)
|
|
return hbm;
|
|
|
|
if (hbm)
|
|
DeleteObject(hbm);
|
|
|
|
return CreateDIBWithProperties((minimalWidth * 3) / 2, (minimalHeight * 3) / 2);
|
|
}
|
|
|
|
int
|
|
GetDIBWidth(HBITMAP hBitmap)
|
|
{
|
|
BITMAP bm;
|
|
::GetObjectW(hBitmap, sizeof(BITMAP), &bm);
|
|
return bm.bmWidth;
|
|
}
|
|
|
|
int
|
|
GetDIBHeight(HBITMAP hBitmap)
|
|
{
|
|
BITMAP bm;
|
|
::GetObjectW(hBitmap, sizeof(BITMAP), &bm);
|
|
return bm.bmHeight;
|
|
}
|
|
|
|
BOOL SaveDIBToFile(HBITMAP hBitmap, LPCWSTR FileName, BOOL fIsMainFile, REFGUID guidFileType)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
CImageDx img;
|
|
img.Attach(hBitmap);
|
|
HRESULT hr = img.SaveDx(FileName, guidFileType, g_xDpi, g_yDpi);
|
|
img.Detach();
|
|
|
|
if (FAILED(hr))
|
|
{
|
|
ShowError(IDS_SAVEERROR, FileName);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!fIsMainFile)
|
|
return TRUE;
|
|
|
|
WIN32_FIND_DATAW find;
|
|
HANDLE hFind = ::FindFirstFileW(FileName, &find);
|
|
if (hFind == INVALID_HANDLE_VALUE)
|
|
{
|
|
ShowError(IDS_SAVEERROR, FileName);
|
|
return FALSE;
|
|
}
|
|
::FindClose(hFind);
|
|
|
|
SetFileInfo(FileName, &find, TRUE);
|
|
g_imageSaved = TRUE;
|
|
return TRUE;
|
|
}
|
|
|
|
void SetFileInfo(LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isAFile)
|
|
{
|
|
// update file time and size
|
|
if (pFound)
|
|
{
|
|
FILETIME ft;
|
|
::FileTimeToLocalFileTime(&pFound->ftLastWriteTime, &ft);
|
|
::FileTimeToSystemTime(&ft, &g_fileTime);
|
|
|
|
g_fileSize = pFound->nFileSizeLow;
|
|
}
|
|
else
|
|
{
|
|
ZeroMemory(&g_fileTime, sizeof(g_fileTime));
|
|
g_fileSize = 0;
|
|
}
|
|
|
|
// update g_szFileName
|
|
if (name && name[0])
|
|
{
|
|
CStringW strName = name;
|
|
::GetFullPathNameW(strName, _countof(g_szFileName), g_szFileName, NULL);
|
|
// The following code won't work correctly when (name == g_szFileName):
|
|
// ::GetFullPathNameW(name, _countof(g_szFileName), g_szFileName, NULL);
|
|
}
|
|
else
|
|
{
|
|
::LoadStringW(g_hinstExe, IDS_DEFAULTFILENAME, g_szFileName, _countof(g_szFileName));
|
|
}
|
|
|
|
// set title
|
|
CStringW strTitle;
|
|
strTitle.Format(IDS_WINDOWTITLE, PathFindFileNameW(g_szFileName));
|
|
mainWindow.SetWindowText(strTitle);
|
|
|
|
// update file info and recent
|
|
g_isAFile = isAFile;
|
|
if (g_isAFile)
|
|
registrySettings.SetMostRecentFile(g_szFileName);
|
|
|
|
g_imageSaved = TRUE;
|
|
}
|
|
|
|
HBITMAP InitializeImage(LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isFile)
|
|
{
|
|
COLORREF white = RGB(255, 255, 255);
|
|
HBITMAP hBitmap = CreateColorDIB(registrySettings.BMPWidth, registrySettings.BMPHeight, white);
|
|
if (hBitmap == NULL)
|
|
{
|
|
ShowOutOfMemory();
|
|
return NULL;
|
|
}
|
|
|
|
HDC hScreenDC = ::GetDC(NULL);
|
|
g_xDpi = (float)::GetDeviceCaps(hScreenDC, LOGPIXELSX);
|
|
g_yDpi = (float)::GetDeviceCaps(hScreenDC, LOGPIXELSY);
|
|
::ReleaseDC(NULL, hScreenDC);
|
|
|
|
return SetBitmapAndInfo(hBitmap, name, pFound, isFile);
|
|
}
|
|
|
|
HBITMAP SetBitmapAndInfo(HBITMAP hBitmap, LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isFile)
|
|
{
|
|
// update image
|
|
canvasWindow.updateScrollPos();
|
|
imageModel.PushImageForUndo(hBitmap);
|
|
imageModel.ClearHistory();
|
|
|
|
SetFileInfo(name, pFound, isFile);
|
|
g_imageSaved = TRUE;
|
|
return hBitmap;
|
|
}
|
|
|
|
HBITMAP DoLoadImageFile(HWND hwnd, LPCWSTR name, BOOL fIsMainFile)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
// find the file
|
|
WIN32_FIND_DATAW find;
|
|
HANDLE hFind = ::FindFirstFileW(name, &find);
|
|
if (hFind == INVALID_HANDLE_VALUE) // does not exist
|
|
{
|
|
ShowError(IDS_LOADERRORTEXT, name);
|
|
return NULL;
|
|
}
|
|
::FindClose(hFind);
|
|
|
|
// is file empty?
|
|
if (find.nFileSizeLow == 0 && find.nFileSizeHigh == 0)
|
|
{
|
|
if (fIsMainFile)
|
|
return InitializeImage(name, &find, TRUE);
|
|
}
|
|
|
|
// load the image
|
|
CImageDx img;
|
|
float xDpi = 0, yDpi = 0;
|
|
HRESULT hr = img.LoadDx(name, &xDpi, &yDpi);
|
|
if (FAILED(hr) && fIsMainFile)
|
|
{
|
|
imageModel.ClearHistory();
|
|
hr = img.LoadDx(name, &xDpi, &yDpi);
|
|
}
|
|
if (FAILED(hr))
|
|
{
|
|
ATLTRACE("hr: 0x%08lX\n", hr);
|
|
ShowError(IDS_LOADERRORTEXT, name);
|
|
return NULL;
|
|
}
|
|
|
|
HBITMAP hBitmap = img.Detach();
|
|
if (!fIsMainFile)
|
|
return hBitmap;
|
|
|
|
if (xDpi <= 0 || yDpi <= 0)
|
|
{
|
|
HDC hDC = ::GetDC(NULL);
|
|
xDpi = (float)::GetDeviceCaps(hDC, LOGPIXELSX);
|
|
yDpi = (float)::GetDeviceCaps(hDC, LOGPIXELSY);
|
|
::ReleaseDC(NULL, hDC);
|
|
}
|
|
|
|
g_xDpi = xDpi;
|
|
g_yDpi = yDpi;
|
|
|
|
SetBitmapAndInfo(hBitmap, name, &find, TRUE);
|
|
return hBitmap;
|
|
}
|
|
|
|
HBITMAP Rotate90DegreeBlt(HDC hDC1, INT cx, INT cy, BOOL bRight, BOOL bMono)
|
|
{
|
|
HBITMAP hbm2;
|
|
if (bMono)
|
|
hbm2 = ::CreateBitmap(cy, cx, 1, 1, NULL);
|
|
else
|
|
hbm2 = CreateDIBWithProperties(cy, cx);
|
|
if (!hbm2)
|
|
return NULL;
|
|
|
|
HDC hDC2 = CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbm2Old = SelectObject(hDC2, hbm2);
|
|
if (bRight)
|
|
{
|
|
for (INT y = 0; y < cy; ++y)
|
|
{
|
|
for (INT x = 0; x < cx; ++x)
|
|
{
|
|
COLORREF rgb = GetPixel(hDC1, x, y);
|
|
SetPixelV(hDC2, cy - (y + 1), x, rgb);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (INT y = 0; y < cy; ++y)
|
|
{
|
|
for (INT x = 0; x < cx; ++x)
|
|
{
|
|
COLORREF rgb = GetPixel(hDC1, x, y);
|
|
SetPixelV(hDC2, y, cx - (x + 1), rgb);
|
|
}
|
|
}
|
|
}
|
|
SelectObject(hDC2, hbm2Old);
|
|
DeleteDC(hDC2);
|
|
return hbm2;
|
|
}
|
|
|
|
HBITMAP SkewDIB(HDC hDC1, HBITMAP hbm, INT nDegree, BOOL bVertical, BOOL bMono)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
if (nDegree == 0)
|
|
return CopyDIBImage(hbm);
|
|
|
|
const double eTan = tan(abs(nDegree) * M_PI / 180);
|
|
|
|
BITMAP bm;
|
|
::GetObjectW(hbm, sizeof(bm), &bm);
|
|
INT cx = bm.bmWidth, cy = bm.bmHeight, dx = 0, dy = 0;
|
|
if (bVertical)
|
|
dy = INT(cx * eTan);
|
|
else
|
|
dx = INT(cy * eTan);
|
|
|
|
if (dx == 0 && dy == 0)
|
|
return CopyDIBImage(hbm);
|
|
|
|
HBITMAP hbmNew;
|
|
if (bMono)
|
|
hbmNew = CreateMonoBitmap(cx + dx, cy + dy, FALSE);
|
|
else
|
|
hbmNew = CreateColorDIB(cx + dx, cy + dy, RGB(255, 255, 255));
|
|
if (!hbmNew)
|
|
return NULL;
|
|
|
|
HDC hDC2 = CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbm2Old = SelectObject(hDC2, hbmNew);
|
|
if (bVertical)
|
|
{
|
|
for (INT x = 0; x < cx; ++x)
|
|
{
|
|
INT delta = INT(x * eTan);
|
|
if (nDegree > 0)
|
|
::BitBlt(hDC2, x, (dy - delta), 1, cy, hDC1, x, 0, SRCCOPY);
|
|
else
|
|
::BitBlt(hDC2, x, delta, 1, cy, hDC1, x, 0, SRCCOPY);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (INT y = 0; y < cy; ++y)
|
|
{
|
|
INT delta = INT(y * eTan);
|
|
if (nDegree > 0)
|
|
::BitBlt(hDC2, (dx - delta), y, cx, 1, hDC1, 0, y, SRCCOPY);
|
|
else
|
|
::BitBlt(hDC2, delta, y, cx, 1, hDC1, 0, y, SRCCOPY);
|
|
}
|
|
}
|
|
|
|
SelectObject(hDC2, hbm2Old);
|
|
DeleteDC(hDC2);
|
|
return hbmNew;
|
|
}
|
|
|
|
HBITMAP getSubImage(HBITMAP hbmWhole, const RECT& rcPartial)
|
|
{
|
|
CRect rc = rcPartial;
|
|
HBITMAP hbmPart = CreateDIBWithProperties(rc.Width(), rc.Height());
|
|
if (!hbmPart)
|
|
return NULL;
|
|
|
|
HDC hDC1 = ::CreateCompatibleDC(NULL);
|
|
HDC hDC2 = ::CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbm1Old = ::SelectObject(hDC1, hbmWhole);
|
|
HGDIOBJ hbm2Old = ::SelectObject(hDC2, hbmPart);
|
|
::BitBlt(hDC2, 0, 0, rc.Width(), rc.Height(), hDC1, rc.left, rc.top, SRCCOPY);
|
|
::SelectObject(hDC1, hbm1Old);
|
|
::SelectObject(hDC2, hbm2Old);
|
|
::DeleteDC(hDC1);
|
|
::DeleteDC(hDC2);
|
|
return hbmPart;
|
|
}
|
|
|
|
void putSubImage(HBITMAP hbmWhole, const RECT& rcPartial, HBITMAP hbmPart)
|
|
{
|
|
CRect rc = rcPartial;
|
|
HDC hDC1 = ::CreateCompatibleDC(NULL);
|
|
HDC hDC2 = ::CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbm1Old = ::SelectObject(hDC1, hbmWhole);
|
|
HGDIOBJ hbm2Old = ::SelectObject(hDC2, hbmPart);
|
|
::BitBlt(hDC1, rc.left, rc.top, rc.Width(), rc.Height(), hDC2, 0, 0, SRCCOPY);
|
|
::SelectObject(hDC1, hbm1Old);
|
|
::SelectObject(hDC2, hbm2Old);
|
|
::DeleteDC(hDC1);
|
|
::DeleteDC(hDC2);
|
|
}
|
|
|
|
struct BITMAPINFODX : BITMAPINFO
|
|
{
|
|
RGBQUAD bmiColorsAdditional[256 - 1];
|
|
};
|
|
|
|
HGLOBAL BitmapToClipboardDIB(HBITMAP hBitmap)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
BITMAP bm;
|
|
if (!GetObjectW(hBitmap, sizeof(BITMAP), &bm))
|
|
return NULL;
|
|
|
|
BITMAPINFODX 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 = bm.bmBitsPixel;
|
|
bmi.bmiHeader.biCompression = BI_RGB;
|
|
bmi.bmiHeader.biSizeImage = bm.bmWidthBytes * bm.bmHeight;
|
|
|
|
INT cColors;
|
|
if (bm.bmBitsPixel < 16)
|
|
cColors = 1 << bm.bmBitsPixel;
|
|
else
|
|
cColors = 0;
|
|
|
|
HDC hDC = CreateCompatibleDC(NULL);
|
|
|
|
if (cColors)
|
|
{
|
|
HGDIOBJ hbmOld = SelectObject(hDC, hBitmap);
|
|
cColors = GetDIBColorTable(hDC, 0, cColors, bmi.bmiColors);
|
|
SelectObject(hDC, hbmOld);
|
|
}
|
|
|
|
DWORD cbColors = cColors * sizeof(RGBQUAD);
|
|
DWORD dwSize = sizeof(BITMAPINFOHEADER) + cbColors + bmi.bmiHeader.biSizeImage;
|
|
HGLOBAL hGlobal = GlobalAlloc(GHND | GMEM_SHARE, dwSize);
|
|
if (hGlobal)
|
|
{
|
|
LPBYTE pb = (LPBYTE)GlobalLock(hGlobal);
|
|
if (pb)
|
|
{
|
|
CopyMemory(pb, &bmi, sizeof(BITMAPINFOHEADER));
|
|
pb += sizeof(BITMAPINFOHEADER);
|
|
|
|
CopyMemory(pb, bmi.bmiColors, cbColors);
|
|
pb += cbColors;
|
|
|
|
GetDIBits(hDC, hBitmap, 0, bm.bmHeight, pb, &bmi, DIB_RGB_COLORS);
|
|
|
|
GlobalUnlock(hGlobal);
|
|
}
|
|
else
|
|
{
|
|
GlobalFree(hGlobal);
|
|
hGlobal = NULL;
|
|
}
|
|
}
|
|
|
|
DeleteDC(hDC);
|
|
|
|
return hGlobal;
|
|
}
|
|
|
|
HBITMAP BitmapFromClipboardDIB(HGLOBAL hGlobal)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
LPBYTE pb = (LPBYTE)GlobalLock(hGlobal);
|
|
if (!pb)
|
|
return NULL;
|
|
|
|
LPBITMAPINFO pbmi = (LPBITMAPINFO)pb;
|
|
pb += pbmi->bmiHeader.biSize;
|
|
|
|
INT cColors = 0, cbColors = 0;
|
|
if (pbmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
|
|
{
|
|
LPBITMAPCOREINFO pbmci = (LPBITMAPCOREINFO)pbmi;
|
|
WORD BitCount = pbmci->bmciHeader.bcBitCount;
|
|
if (BitCount < 16)
|
|
{
|
|
cColors = (1 << BitCount);
|
|
cbColors = cColors * sizeof(RGBTRIPLE);
|
|
pb += cbColors;
|
|
}
|
|
}
|
|
else if (pbmi->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER))
|
|
{
|
|
WORD BitCount = pbmi->bmiHeader.biBitCount;
|
|
if (BitCount < 16)
|
|
{
|
|
cColors = (1 << BitCount);
|
|
cbColors = cColors * sizeof(RGBQUAD);
|
|
pb += cbColors;
|
|
}
|
|
}
|
|
|
|
HDC hDC = CreateCompatibleDC(NULL);
|
|
HBITMAP hBitmap = CreateDIBSection(hDC, pbmi, DIB_RGB_COLORS, NULL, NULL, 0);
|
|
if (hBitmap)
|
|
{
|
|
SetDIBits(hDC, hBitmap, 0, labs(pbmi->bmiHeader.biHeight), pb, pbmi, DIB_RGB_COLORS);
|
|
}
|
|
DeleteDC(hDC);
|
|
|
|
GlobalUnlock(hGlobal);
|
|
|
|
return hBitmap;
|
|
}
|
|
|
|
HBITMAP BitmapFromHEMF(HENHMETAFILE hEMF)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
ENHMETAHEADER header;
|
|
if (!GetEnhMetaFileHeader(hEMF, sizeof(header), &header))
|
|
return NULL;
|
|
|
|
CRect rc = *(LPRECT)&header.rclBounds;
|
|
INT cx = rc.Width(), cy = rc.Height();
|
|
HBITMAP hbm = CreateColorDIB(cx, cy, RGB(255, 255, 255));
|
|
if (!hbm)
|
|
return NULL;
|
|
|
|
HDC hDC = CreateCompatibleDC(NULL);
|
|
HGDIOBJ hbmOld = SelectObject(hDC, hbm);
|
|
PlayEnhMetaFile(hDC, hEMF, &rc);
|
|
SelectObject(hDC, hbmOld);
|
|
DeleteDC(hDC);
|
|
|
|
return hbm;
|
|
}
|
|
|
|
BOOL IsBitmapBlackAndWhite(HBITMAP hbm)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
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)
|
|
{
|
|
CWaitCursor waitCursor;
|
|
|
|
BITMAP bm;
|
|
if (!::GetObjectW(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;
|
|
}
|