115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
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//-------------------------------------------------------------------------
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// TmUtils.cpp - theme manager shared utilities
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//-------------------------------------------------------------------------
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#include "stdafx.h"
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#include "TmUtils.h"
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//-------------------------------------------------------------------------
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CBitmapPixels::CBitmapPixels()
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{
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_hdrBitmap = NULL;
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_iWidth = 0;
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_iHeight = 0;
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}
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//-------------------------------------------------------------------------
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CBitmapPixels::~CBitmapPixels()
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{
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if (_hdrBitmap)
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delete [] (BYTE *)_hdrBitmap;
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}
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//-------------------------------------------------------------------------
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HRESULT CBitmapPixels::OpenBitmap(HDC hdc, HBITMAP bitmap, BOOL fForceRGB32,
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DWORD OUT **pPixels, OPTIONAL OUT int *piWidth, OPTIONAL OUT int *piHeight,
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OPTIONAL OUT int *piBytesPerPixel, OPTIONAL OUT int *piBytesPerRow)
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{
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if (! pPixels)
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return E_INVALIDARG;
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BITMAP bminfo;
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GetObject(bitmap, sizeof(bminfo), &bminfo);
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_iWidth = bminfo.bmWidth;
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_iHeight = bminfo.bmHeight;
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int iBytesPerPixel = 3;
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#if 0
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if ((fForceRGB32) || (bminfo.bmBitsPixel == 32))
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iBytesPerPixel = 4;
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else
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iBytesPerPixel = 3;
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#endif
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int iRawBytes = _iWidth * iBytesPerPixel;
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int iBytesPerRow = 4*((iRawBytes+3)/4);
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int size = sizeof(BITMAPINFOHEADER) + _iHeight*iBytesPerRow;
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BYTE *dibBuff = new BYTE[size+100]; // avoid random GetDIBits() failures with 100 bytes padding (?)
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if (! dibBuff)
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return E_OUTOFMEMORY;
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_hdrBitmap = (BITMAPINFOHEADER *)dibBuff;
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memset(_hdrBitmap, 0, sizeof(BITMAPINFOHEADER));
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_hdrBitmap->biSize = sizeof(BITMAPINFOHEADER);
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_hdrBitmap->biWidth = _iWidth;
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_hdrBitmap->biHeight = _iHeight;
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_hdrBitmap->biPlanes = 1;
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_hdrBitmap->biBitCount = 8*iBytesPerPixel;
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_hdrBitmap->biCompression = BI_RGB;
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bool fNeedRelease = false;
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if (! hdc)
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{
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hdc = GetWindowDC(NULL);
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fNeedRelease = true;
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}
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int linecnt = GetDIBits(hdc, bitmap, 0, _iHeight, DIBDATA(_hdrBitmap), (BITMAPINFO *)_hdrBitmap,
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DIB_RGB_COLORS);
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if (fNeedRelease)
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ReleaseDC(NULL, hdc);
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*pPixels = (DWORD *)DIBDATA(_hdrBitmap);
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if (piWidth)
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*piWidth = _iWidth;
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if (piHeight)
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*piHeight = _iHeight;
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if (piBytesPerPixel)
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*piBytesPerPixel = iBytesPerPixel;
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if (piBytesPerRow)
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*piBytesPerRow = iBytesPerRow;
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return S_OK;
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}
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//-------------------------------------------------------------------------
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void CBitmapPixels::CloseBitmap(HDC hdc, HBITMAP hBitmap)
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{
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if (_hdrBitmap)
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{
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if (hBitmap) // rewrite bitmap
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{
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bool fNeedRelease = false;
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if (! hdc)
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{
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hdc = GetWindowDC(NULL);
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fNeedRelease = true;
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}
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SetDIBits(hdc, hBitmap, 0, _iHeight, DIBDATA(_hdrBitmap), (BITMAPINFO *)_hdrBitmap,
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DIB_RGB_COLORS);
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if ((fNeedRelease) && (hdc))
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ReleaseDC(NULL, hdc);
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}
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delete [] (BYTE *)_hdrBitmap;
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_hdrBitmap = NULL;
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}
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}
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//-------------------------------------------------------------------------
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