X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/be69f971c404a0260ab5e7c195182d267b893245..d8812c6e0e780fb2dae99bc352c5061f58793e14:/src/msw/dib.cpp diff --git a/src/msw/dib.cpp b/src/msw/dib.cpp index 8da2f37757..35ddb6d72f 100644 --- a/src/msw/dib.cpp +++ b/src/msw/dib.cpp @@ -30,29 +30,25 @@ #pragma hdrstop #endif +#if wxUSE_WXDIB + #ifndef WX_PRECOMP #include "wx/string.h" #include "wx/log.h" + #include "wx/intl.h" + #include "wx/bitmap.h" + #include "wx/image.h" #endif //WX_PRECOMP -#if wxUSE_WXDIB - -#include "wx/bitmap.h" -#include "wx/intl.h" #include "wx/file.h" #include #include -#if !defined(__MWERKS__) && !defined(__SALFORDC__) +#if !defined(__MWERKS__) #include #endif -#ifdef __GNUWIN32_OLD__ - #include "wx/msw/gnuwin32/extra.h" -#endif - -#include "wx/image.h" #include "wx/msw/dib.h" #ifdef __WXWINCE__ @@ -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 @@ -100,39 +96,33 @@ bool wxDIB::Create(int width, int height, int depth) depth = 24; // allocate memory for bitmap structures - static const int sizeHeader = sizeof(BITMAPINFOHEADER); - - BITMAPINFO *info = (BITMAPINFO *)malloc(sizeHeader); - wxCHECK_MSG( info, false, _T("malloc(BITMAPINFO) failed") ); + BITMAPINFO info; + wxZeroMemory(info); - memset(info, 0, sizeHeader); - - info->bmiHeader.biSize = sizeHeader; - info->bmiHeader.biWidth = width; + info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); + info.bmiHeader.biWidth = width; // we use positive height here which corresponds to a DIB with normal, i.e. // bottom to top, order -- normally using negative height (which means // reversed for MS and hence natural for all the normal people top to // bottom line scan order) could be used to avoid the need for the image // reversal in Create(image) but this doesn't work under NT, only Win9x! - info->bmiHeader.biHeight = height; + info.bmiHeader.biHeight = height; - info->bmiHeader.biPlanes = 1; - info->bmiHeader.biBitCount = depth; - info->bmiHeader.biSizeImage = GetLineSize(width, depth)*height; + info.bmiHeader.biPlanes = 1; + info.bmiHeader.biBitCount = (WORD)depth; + info.bmiHeader.biSizeImage = GetLineSize(width, depth)*height; m_handle = ::CreateDIBSection ( 0, // hdc (unused with DIB_RGB_COLORS) - info, // bitmap description + &info, // bitmap description DIB_RGB_COLORS, // use RGB, not palette &m_data, // [out] DIB bits NULL, // don't use file mapping 0 // file mapping offset (not used here) ); - free(info); - if ( !m_handle ) { wxLogLastError(wxT("CreateDIBSection")); @@ -151,10 +141,18 @@ 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 +170,20 @@ 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; } @@ -275,7 +280,7 @@ bool wxDIB::Load(const wxString& filename) m_handle = (HBITMAP)::LoadImage ( wxGetInstance(), - filename, + filename.fn_str(), IMAGE_BITMAP, 0, 0, // don't specify the size LR_CREATEDIBSECTION | LR_LOADFROMFILE @@ -296,6 +301,7 @@ bool wxDIB::Save(const wxString& filename) { wxCHECK_MSG( m_handle, false, _T("wxDIB::Save(): invalid object") ); +#if wxUSE_FILE wxFile file(filename, wxFile::write); bool ok = file.IsOpened(); if ( ok ) @@ -324,6 +330,9 @@ bool wxDIB::Save(const wxString& filename) file.Write(ds.dsBm.bmBits, sizeImage) == sizeImage; } } +#else // !wxUSE_FILE + bool ok = false; +#endif // wxUSE_FILE/!wxUSE_FILE if ( !ok ) { @@ -383,7 +392,31 @@ 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 +564,7 @@ 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 +586,10 @@ 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 +617,8 @@ 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 +627,13 @@ 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 +657,7 @@ wxPalette *wxDIB::CreatePalette() const palette->SetHPALETTE((WXHPALETTE)hPalette); return palette; +#endif } #endif // wxUSE_PALETTE @@ -634,8 +677,8 @@ 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 +688,37 @@ 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 +748,20 @@ 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++ ) { @@ -715,10 +773,26 @@ wxImage wxDIB::ConvertToImage() const dst[1] = *src++; dst[0] = *src++; - dst += 3; + if ( is32bit ) + { + if ( alpha ) + { + // wxImage uses non premultiplied alpha so undo + // premultiplication done in Create() above + const unsigned char a = *src; + *alpha++ = a; + if ( a > 0 ) + { + dst[0] = (dst[0] * 255) / a; + dst[1] = (dst[1] * 255) / a; + dst[2] = (dst[2] * 255) / a; + } + } - if ( alpha ) - *alpha++ = *src++; + src++; + } + + dst += 3; } // pass to the previous line in the image @@ -736,4 +810,3 @@ wxImage wxDIB::ConvertToImage() const #endif // wxUSE_IMAGE #endif // wxUSE_WXDIB -