#include <string>
bool LoadBitmapFromFile(CBitmap* bitmap,const TCHAR* path){
ATLASSERT(bitmap);
ATLASSERT(path);
HBITMAP pbitmap_ = (HBITMAP) LoadImage(
NULL,
path,
IMAGE_BITMAP,
0,
0,
LR_CREATEDIBSECTION | LR_LOADFROMFILE);
if (pbitmap_ == NULL)
return false;
bitmap->Attach(pbitmap_);
return true;
}
void BitmapToRegion (
const CBitmap& hBmp,
CRgn* rgn,
COLORREF cTransparentColor,
COLORREF cTolerance)
{
CRgn hRgn;
ATLASSERT(rgn);
ATLASSERT(hBmp.m_hBitmap);
if (hBmp.m_hBitmap) {
// Create a memory DC inside which we will scan the bitmap conten
CDC hMemDC_;
hMemDC_.CreateCompatibleDC(NULL);
ATLASSERT(hMemDC_.m_hDC);
if (hMemDC_.m_hDC) {
// Get bitmap siz
BITMAP bm;
hBmp.GetBitmap(bm);
// Create a 32 bits depth bitmap and select it into the memory DC
BITMAPINFOHEADER RGB32BITSBITMAPINFO = {
sizeof(BITMAPINFOHEADER), // biSize
bm.bmWidth, // biWidth;
bm.bmHeight, // biHeight;
1, // biPlanes;
32, // biBitCount
BI_RGB, // biCompression;
0, // biSizeImage;
0, // biXPelsPerMeter;
0, // biYPelsPerMeter;
0, // biClrUsed;
0 // biClrImportant;
};
VOID * pbits32;
CBitmap hbm32_;
hbm32_.CreateDIBSection(hMemDC_, (BITMAPINFO *)&RGB32BITSBITMAPINFO, DIB_RGB_COLORS, &pbits32, NULL, 0);
ATLASSERT(hbm32_.m_hBitmap);
if (hbm32_.m_hBitmap) {
HBITMAP holdBmp = hMemDC_.SelectBitmap(hbm32_);
// Create a DC just to copy the bitmap into the memory D
CDC hDc_;
hDc_.CreateCompatibleDC(hMemDC_);
ATLASSERT(hDc_.m_hDC);
if (hDc_.m_hDC) {
// Get how many bytes per row we have for the bitmap bits (rounded up to 32 bits
BITMAP bm32;
ATLVERIFY(hbm32_.GetBitmap(bm32));
while (bm32.bmWidthBytes % 4)
bm32.bmWidthBytes++;
// Copy the bitmap into the memory D
HBITMAP holdBmp = hDc_.SelectBitmap(hBmp);
ATLVERIFY(hMemDC_.BitBlt(0, 0, bm.bmWidth, bm.bmHeight, hDc_, 0, 0, SRCCOPY));
// For better performances, we will use the ExtCreateRegion() function to create th
// region. This function take a RGNDATA structure on entry. We will add rectangles b
// amount of ALLOC_UNIT number in this structure
#define ALLOC_UNIT 100
DWORD maxRects = ALLOC_UNIT;
HANDLE hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects));
RGNDATA *pData = (RGNDATA *)GlobalLock(hData);
pData->rdh.dwSize = sizeof(RGNDATAHEADER);
pData->rdh.iType = RDH_RECTANGLES;
pData->rdh.nCount = pData->rdh.nRgnSize = 0;
SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
// Keep on hand highest and lowest values for the "transparent" pixel
BYTE lr = GetRValue(cTransparentColor);
BYTE lg = GetGValue(cTransparentColor);
BYTE lb = GetBValue(cTransparentColor);
BYTE hr = min(0xff, lr + GetRValue(cTolerance));
BYTE hg = min(0xff, lg + GetGValue(cTolerance));
BYTE hb = min(0xff, lb + GetBValue(cTolerance));
// Scan each bitmap row from bottom to top (the bitmap is inverted vertically
BYTE *p32 = (BYTE *)bm32.bmBits + (bm32.bmHeight - 1) * bm32.bmWidthBytes;
for (int y = 0; y < bm.bmHeight; y++) {
// Scan each bitmap pixel from left to righ
for (int x = 0; x < bm.bmWidth; x++) {
// Search for a continuous range of "non transparent pixels"
int x0 = x;
LONG *p = (LONG *)p32 + x;
while (x < bm.bmWidth) {
BYTE b = GetRValue(*p);
if (b >= lr && b <= hr) {
b = GetGValue(*p);
if (b >= lg && b <= hg) {
b = GetBValue(*p);
if (b >= lb && b <= hb)
// This pixel is "transparent"
break;
}
}
p++;
x++;
}
if (x > x0) {
// Add the pixels (x0, y) to (x, y+1) as a new rectangle in the regio
if (pData->rdh.nCount >= maxRects) {
GlobalUnlock(hData);
maxRects += ALLOC_UNIT;
ATLVERIFY(hData = GlobalReAlloc(hData, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), GMEM_MOVEABLE));
pData = (RGNDATA *)GlobalLock(hData);
ATLASSERT(pData);
}
RECT *pr = (RECT *)&pData->Buffer;
SetRect(&pr[pData->rdh.nCount], x0, y, x, y+1);
if (x0 < pData->rdh.rcBound.left)
pData->rdh.rcBound.left = x0;
if (y < pData->rdh.rcBound.top)
pData->rdh.rcBound.top = y;
if (x > pData->rdh.rcBound.right)
pData->rdh.rcBound.right = x;
if (y+1 > pData->rdh.rcBound.bottom)
pData->rdh.rcBound.bottom = y+1;
pData->rdh.nCount++;
// On Windows98, ExtCreateRegion() may fail if the number of rectangles is to
// large (ie: > 4000). Therefore, we have to create the region by multiple steps
if (pData->rdh.nCount == 2000) {
HRGN h = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
ATLASSERT(h);
if (hRgn.m_hRgn) {
hRgn.CombineRgn(hRgn, h, RGN_OR);
DeleteObject(h);
} else
hRgn.Attach(h);
pData->rdh.nCount = 0;
SetRect(&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
}
}
}
// Go to next row (remember, the bitmap is inverted vertically
p32 -= bm32.bmWidthBytes;
}
// Create or extend the region with the remaining rectangle
HRGN h = ExtCreateRegion(NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
ATLASSERT(h);
if (hRgn.m_hRgn) {
hRgn.CombineRgn(hRgn, h, RGN_OR);
DeleteObject(h);
} else
hRgn.Attach(h);
// Clean u
hDc_.SelectBitmap(holdBmp);
}
hMemDC_.SelectBitmap(holdBmp);
}
}
}
rgn->Attach(hRgn.Detach());
}
void MakeWindowRgn (CWindow * window,const CBitmap& bitmapBk,COLORREF colorMask)
{
CRgn rgn_;
BitmapToRegion( bitmapBk,&rgn_,colorMask);
window->SetWindowRgn (rgn_, TRUE);
}
bool TileBitmap(CDCHandle & pDC, const CBitmap & bitmap,const CRect& rect)
{
int top = rect.top;
SIZE imgSize_;
bitmap.GetSize(imgSize_);
CDC dcMem;
dcMem.CreateCompatibleDC ( pDC );
dcMem.SelectBitmap(bitmap);
int height_;
while(top < rect.bottom) {
height_ = imgSize_.cy;
if( top + height_ > rect.bottom ) {
height_ = rect.bottom - top;
}
int width_;
int left_ = rect.left;
int right_ = rect.right;
while( left_ < right_) {
width_ = imgSize_.cx;
if( left_ + width_ > right_ ) {
width_ = right_ - left_;
}
pDC.BitBlt(left_,top ,width_ ,height_ , dcMem, 0, 0, SRCCOPY);
left_ += width_;
}
top += height_;
}
return true;
}