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winhelp: Added support for transparent bitmaps.

This commit is contained in:
Eric Pouech 2008-04-30 08:32:06 +02:00 committed by Alexandre Julliard
parent 8f1805f9b6
commit 2f1048862a
1 changed files with 91 additions and 2 deletions
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93
programs/winhelp/hlpfile.c
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@ -708,6 +708,89 @@ static BOOL HLPFILE_RtfAddHexBytes(struct RtfData* rd, const void* _ptr, unsigne
return TRUE;
}
/******************************************************************
* HLPFILE_RtfAddTransparentBitmap
*
* We'll transform a transparent bitmap into an metafile that
* we then transform into RTF
*/
static BOOL HLPFILE_RtfAddTransparentBitmap(struct RtfData* rd, const BITMAPINFO* bi,
const void* pict, unsigned nc)
{
HDC hdc, hdcMask, hdcMem, hdcEMF;
HBITMAP hbm, hbmMask, hbmOldMask, hbmOldMem;
HENHMETAFILE hEMF;
BOOL ret = FALSE;
void* data;
UINT sz;
hbm = CreateDIBitmap(hdc = GetDC(0), &bi->bmiHeader,
CBM_INIT, pict, bi, DIB_RGB_COLORS);
hdcMem = CreateCompatibleDC(hdc);
hbmOldMem = SelectObject(hdcMem, hbm);
/* create the mask bitmap from the main bitmap */
hdcMask = CreateCompatibleDC(hdc);
hbmMask = CreateBitmap(bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, 1, 1, NULL);
hbmOldMask = SelectObject(hdcMask, hbmMask);
SetBkColor(hdcMem,
RGB(bi->bmiColors[nc - 1].rgbRed,
bi->bmiColors[nc - 1].rgbGreen,
bi->bmiColors[nc - 1].rgbBlue));
BitBlt(hdcMask, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMem, 0, 0, SRCCOPY);
/* sets to RGB(0,0,0) the transparent bits in main bitmap */
SetBkColor(hdcMem, RGB(0,0,0));
SetTextColor(hdcMem, RGB(255,255,255));
BitBlt(hdcMem, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMask, 0, 0, SRCAND);
SelectObject(hdcMask, hbmOldMask);
DeleteDC(hdcMask);
SelectObject(hdcMem, hbmOldMem);
DeleteDC(hdcMem);
/* we create the bitmap on the fly */
hdcEMF = CreateEnhMetaFile(NULL, NULL, NULL, NULL);
hdcMem = CreateCompatibleDC(hdcEMF);
/* sets to RGB(0,0,0) the transparent bits in final bitmap */
hbmOldMem = SelectObject(hdcMem, hbmMask);
SetBkColor(hdcEMF, RGB(255, 255, 255));
SetTextColor(hdcEMF, RGB(0, 0, 0));
BitBlt(hdcEMF, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMem, 0, 0, SRCAND);
/* and copy the remaining bits of main bitmap */
SelectObject(hdcMem, hbm);
BitBlt(hdcEMF, 0, 0, bi->bmiHeader.biWidth, bi->bmiHeader.biHeight, hdcMem, 0, 0, SRCPAINT);
SelectObject(hdcMem, hbmOldMem);
DeleteDC(hdcMem);
/* do the cleanup */
ReleaseDC(0, hdc);
DeleteObject(hbmMask);
DeleteObject(hbm);
hEMF = CloseEnhMetaFile(hdcEMF);
/* generate rtf stream */
sz = GetEnhMetaFileBits(hEMF, 0, NULL);
if (sz && (data = HeapAlloc(GetProcessHeap(), 0, sz)))
{
if (sz == GetEnhMetaFileBits(hEMF, sz, data))
{
ret = HLPFILE_RtfAddControl(rd, "{\\pict\\emfblip") &&
HLPFILE_RtfAddHexBytes(rd, data, sz) &&
HLPFILE_RtfAddControl(rd, "}");
}
HeapFree(GetProcessHeap(), 0, data);
}
DeleteEnhMetaFile(hEMF);
return ret;
}
/******************************************************************
* HLPFILE_RtfAddBitmap
*
@ -719,6 +802,7 @@ static BOOL HLPFILE_RtfAddBitmap(struct RtfData* rd, BYTE* beg, BYTE type, BYTE
BITMAPINFO* bi;
unsigned long off, csz;
unsigned nc = 0;
BOOL clrImportant = FALSE;
BOOL ret = FALSE;
char tmp[256];
@ -735,7 +819,8 @@ static BOOL HLPFILE_RtfAddBitmap(struct RtfData* rd, BYTE* beg, BYTE type, BYTE
bi->bmiHeader.biWidth = fetch_ulong(&ptr);
bi->bmiHeader.biHeight = fetch_ulong(&ptr);
bi->bmiHeader.biClrUsed = fetch_ulong(&ptr);
bi->bmiHeader.biClrImportant = fetch_ulong(&ptr);
clrImportant = fetch_ulong(&ptr);
bi->bmiHeader.biClrImportant = (clrImportant > 1) ? clrImportant : 0;
bi->bmiHeader.biCompression = BI_RGB;
if (bi->bmiHeader.biBitCount > 32) WINE_FIXME("Unknown bit count %u\n", bi->bmiHeader.biBitCount);
if (bi->bmiHeader.biPlanes != 1) WINE_FIXME("Unsupported planes %u\n", bi->bmiHeader.biPlanes);
@ -773,7 +858,11 @@ static BOOL HLPFILE_RtfAddBitmap(struct RtfData* rd, BYTE* beg, BYTE type, BYTE
}
pict_beg = HLPFILE_DecompressGfx(beg + off, csz, bi->bmiHeader.biSizeImage, pack);
if (clrImportant == 1 && nc > 0)
{
ret = HLPFILE_RtfAddTransparentBitmap(rd, bi, pict_beg, nc);
goto done;
}
if (!HLPFILE_RtfAddControl(rd, "{\\pict")) goto done;
if (type == 0x06)
{