X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/77ffb5937e89927b621128789401db8921fe580f..7e02be855d14263c996448bdb56c9e1002ad9b53:/src/msw/dib.cpp?ds=sidebyside diff --git a/src/msw/dib.cpp b/src/msw/dib.cpp index 21a5c2fc95..9b1c1a6160 100644 --- a/src/msw/dib.cpp +++ b/src/msw/dib.cpp @@ -6,7 +6,7 @@ // Created: 03.03.03 (replaces the old file with the same name) // RCS-ID: $Id$ // Copyright: (c) 2003 Vadim Zeitlin -// License: wxWidgets licence +// License: wxWindows licence /////////////////////////////////////////////////////////////////////////////// /* @@ -48,10 +48,6 @@ #include #endif -#ifdef __GNUWIN32_OLD__ - #include "wx/msw/gnuwin32/extra.h" -#endif - #include "wx/image.h" #include "wx/msw/dib.h" @@ -69,7 +65,7 @@ static inline WORD GetNumberOfColours(WORD bitsPerPixel) { // only 1, 4 and 8bpp bitmaps use palettes (well, they could be used with // 24bpp ones too but we don't support this as I think it's quite uncommon) - return bitsPerPixel <= 8 ? 1 << bitsPerPixel : 0; + return (WORD)(bitsPerPixel <= 8 ? 1 << bitsPerPixel : 0); } // wrapper around ::GetObject() for DIB sections @@ -118,7 +114,7 @@ bool wxDIB::Create(int width, int height, int depth) info->bmiHeader.biHeight = height; info->bmiHeader.biPlanes = 1; - info->bmiHeader.biBitCount = depth; + info->bmiHeader.biBitCount = (WORD)depth; info->bmiHeader.biSizeImage = GetLineSize(width, depth)*height; m_handle = ::CreateDIBSection @@ -151,10 +147,18 @@ bool wxDIB::Create(const wxBitmap& bmp) { wxCHECK_MSG( bmp.Ok(), false, _T("wxDIB::Create(): invalid bitmap") ); + if ( !Create(GetHbitmapOf(bmp)) ) + return false; + + m_hasAlpha = bmp.HasAlpha(); + + return true; +} + +bool wxDIB::Create(HBITMAP hbmp) +{ // this bitmap could already be a DIB section in which case we don't need // to convert it to DIB - HBITMAP hbmp = GetHbitmapOf(bmp); - DIBSECTION ds; if ( GetDIBSection(hbmp, &ds) ) { @@ -172,13 +176,20 @@ bool wxDIB::Create(const wxBitmap& bmp) } else // no, it's a DDB -- convert it to DIB { - const int w = bmp.GetWidth(); - const int h = bmp.GetHeight(); - int d = bmp.GetDepth(); + // prepare all the info we need + BITMAP bm; + if ( !::GetObject(hbmp, sizeof(bm), &bm) ) + { + wxLogLastError(wxT("GetObject(bitmap)")); + + return false; + } + + int d = bm.bmBitsPixel; if ( d <= 0 ) d = wxDisplayDepth(); - if ( !Create(w, h, d) || !CopyFromDDB(hbmp) ) + if ( !Create(bm.bmWidth, bm.bmHeight, d) || !CopyFromDDB(hbmp) ) return false; } @@ -383,7 +394,31 @@ HBITMAP wxDIB::CreateDDB(HDC hdc) const return 0; } - return ConvertToBitmap((BITMAPINFO *)&ds.dsBmih, hdc, ds.dsBm.bmBits); + // how many colours are we going to have in the palette? + DWORD biClrUsed = ds.dsBmih.biClrUsed; + if ( !biClrUsed ) + { + // biClrUsed field might not be set + biClrUsed = GetNumberOfColours(ds.dsBmih.biBitCount); + } + + if ( !biClrUsed ) + { + return ConvertToBitmap((BITMAPINFO *)&ds.dsBmih, hdc, ds.dsBm.bmBits); + } + else + { + // fake a BITMAPINFO w/o bits, just the palette info + wxCharBuffer bmi(sizeof(BITMAPINFO) + (biClrUsed - 1)*sizeof(RGBQUAD)); + BITMAPINFO *pBmi = (BITMAPINFO *)bmi.data(); + MemoryHDC hDC; + // get the colour table + SelectInHDC sDC(hDC, m_handle); + ::GetDIBColorTable(hDC, 0, biClrUsed, pBmi->bmiColors); + memcpy(&pBmi->bmiHeader, &ds.dsBmih, ds.dsBmih.biSize); + + return ConvertToBitmap(pBmi, hdc, ds.dsBm.bmBits); + } } /* static */ @@ -531,7 +566,7 @@ HGLOBAL wxDIB::ConvertFromBitmap(HBITMAP hbmp) return NULL; } - if ( !ConvertFromBitmap((BITMAPINFO *)(void *)GlobalPtr(hDIB), hbmp) ) + if ( !ConvertFromBitmap((BITMAPINFO *)(void *)GlobalPtrLock(hDIB), hbmp) ) { // this really shouldn't happen... it worked the first time, why not // now? @@ -553,6 +588,10 @@ HGLOBAL wxDIB::ConvertFromBitmap(HBITMAP hbmp) wxPalette *wxDIB::CreatePalette() const { + // GetDIBColorTable not available in eVC3 +#if defined(_WIN32_WCE) && _WIN32_WCE < 400 + return NULL; +#else wxCHECK_MSG( m_handle, NULL, _T("wxDIB::CreatePalette(): invalid object") ); DIBSECTION ds; @@ -580,6 +619,8 @@ wxPalette *wxDIB::CreatePalette() const return NULL; } + MemoryHDC hDC; + // LOGPALETTE struct has only 1 element in palPalEntry array, we're // going to have biClrUsed of them so add necessary space LOGPALETTE *pPalette = (LOGPALETTE *) @@ -588,10 +629,13 @@ wxPalette *wxDIB::CreatePalette() const // initialize the palette header pPalette->palVersion = 0x300; // magic number, not in docs but works - pPalette->palNumEntries = biClrUsed; + pPalette->palNumEntries = (WORD)biClrUsed; - // and the colour table (it starts right after the end of the header) - const RGBQUAD *pRGB = (RGBQUAD *)((char *)&ds.dsBmih + ds.dsBmih.biSize); + // and the colour table + wxCharBuffer rgb(sizeof(RGBQUAD) * biClrUsed); + RGBQUAD *pRGB = (RGBQUAD*)rgb.data(); + SelectInHDC selectHandle(hDC, m_handle); + ::GetDIBColorTable(hDC, 0, biClrUsed, pRGB); for ( DWORD i = 0; i < biClrUsed; i++, pRGB++ ) { pPalette->palPalEntry[i].peRed = pRGB->rgbRed; @@ -615,6 +659,7 @@ wxPalette *wxDIB::CreatePalette() const palette->SetHPALETTE((WXHPALETTE)hPalette); return palette; +#endif } #endif // wxUSE_PALETTE @@ -634,8 +679,8 @@ bool wxDIB::Create(const wxImage& image) // if we have alpha channel, we need to create a 32bpp RGBA DIB, otherwise // a 24bpp RGB is sufficient - const bool hasAlpha = image.HasAlpha(); - const int bpp = hasAlpha ? 32 : 24; + m_hasAlpha = image.HasAlpha(); + const int bpp = m_hasAlpha ? 32 : 24; if ( !Create(w, h, bpp) ) return false; @@ -645,23 +690,37 @@ bool wxDIB::Create(const wxImage& image) const int srcBytesPerLine = w * 3; const int dstBytesPerLine = GetLineSize(w, bpp); const unsigned char *src = image.GetData() + ((h - 1) * srcBytesPerLine); - const unsigned char *alpha = hasAlpha ? image.GetAlpha() + (h - 1)*w : NULL; + const unsigned char *alpha = m_hasAlpha ? image.GetAlpha() + (h - 1)*w + : NULL; unsigned char *dstLineStart = (unsigned char *)m_data; for ( int y = 0; y < h; y++ ) { // copy one DIB line unsigned char *dst = dstLineStart; - for ( int x = 0; x < w; x++ ) + if ( alpha ) { - // also, the order of RGB is inversed for DIBs - *dst++ = src[2]; - *dst++ = src[1]; - *dst++ = src[0]; - - src += 3; - - if ( alpha ) - *dst++ = *alpha++; + for ( int x = 0; x < w; x++ ) + { + // RGB order is reversed, and we need to premultiply + // all channels by alpha value for use with ::AlphaBlend. + const unsigned char a = *alpha++; + *dst++ = (unsigned char)((src[2] * a + 127) / 255); + *dst++ = (unsigned char)((src[1] * a + 127) / 255); + *dst++ = (unsigned char)((src[0] * a + 127) / 255); + *dst++ = a; + src += 3; + } + } + else // no alpha channel + { + for ( int x = 0; x < w; x++ ) + { + // RGB order is reversed. + *dst++ = src[2]; + *dst++ = src[1]; + *dst++ = src[0]; + src += 3; + } } // pass to the previous line in the image @@ -691,19 +750,20 @@ wxImage wxDIB::ConvertToImage() const return wxNullImage; } - const int bpp = GetDepth(); - if ( bpp == 32 ) + if ( m_hasAlpha ) { image.SetAlpha(); } // this is the same loop as in Create() just above but with copy direction // reversed + const int bpp = GetDepth(); const int dstBytesPerLine = w * 3; const int srcBytesPerLine = GetLineSize(w, bpp); unsigned char *dst = image.GetData() + ((h - 1) * dstBytesPerLine); unsigned char *alpha = image.HasAlpha() ? image.GetAlpha() + (h - 1)*w : NULL; + const bool is32bit = bpp == 32; const unsigned char *srcLineStart = (unsigned char *)GetData(); for ( int y = 0; y < h; y++ ) { @@ -717,8 +777,12 @@ wxImage wxDIB::ConvertToImage() const dst += 3; - if ( alpha ) - *alpha++ = *src++; + if ( is32bit ) + { + if ( alpha ) + *alpha++ = *src; + src++; + } } // pass to the previous line in the image