X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2cef71bc23a9cd0ec543e451848fb9e88ace36e9..ba75967c9c0656ec0bcc342878cd9cdd27857ea9:/src/msw/dib.cpp diff --git a/src/msw/dib.cpp b/src/msw/dib.cpp index 1a57decc31..be10fcf047 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: wxWindows licence +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// /* @@ -30,25 +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 -#include "wx/image.h" #include "wx/msw/dib.h" #ifdef __WXWINCE__ @@ -91,44 +91,38 @@ bool wxDIB::Create(int width, int height, int depth) { // we don't support formats using palettes right now so we only create // either 24bpp (RGB) or 32bpp (RGBA) bitmaps - wxASSERT_MSG( depth, _T("invalid image depth in wxDIB::Create()") ); + wxASSERT_MSG( depth, wxT("invalid image depth in wxDIB::Create()") ); if ( depth < 24 ) depth = 24; // allocate memory for bitmap structures - static const int sizeHeader = sizeof(BITMAPINFOHEADER); + BITMAPINFO info; + wxZeroMemory(info); - BITMAPINFO *info = (BITMAPINFO *)malloc(sizeHeader); - wxCHECK_MSG( info, false, _T("malloc(BITMAPINFO) failed") ); - - 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 = (WORD)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")); @@ -145,7 +139,7 @@ bool wxDIB::Create(int width, int height, int depth) bool wxDIB::Create(const wxBitmap& bmp) { - wxCHECK_MSG( bmp.Ok(), false, _T("wxDIB::Create(): invalid bitmap") ); + wxCHECK_MSG( bmp.Ok(), false, wxT("wxDIB::Create(): invalid bitmap") ); if ( !Create(GetHbitmapOf(bmp)) ) return false; @@ -232,7 +226,7 @@ bool wxDIB::CopyFromDDB(HBITMAP hbmp) SRCCOPY ) ) { - wxLogLastError(_T("BitBlt(DDB -> DIB)")); + wxLogLastError(wxT("BitBlt(DDB -> DIB)")); return false; } @@ -248,7 +242,7 @@ bool wxDIB::CopyFromDDB(HBITMAP hbmp) if ( !GetDIBSection(m_handle, &ds) ) { // we're sure that our handle is a DIB section, so this should work - wxFAIL_MSG( _T("GetObject(DIBSECTION) unexpectedly failed") ); + wxFAIL_MSG( wxT("GetObject(DIBSECTION) unexpectedly failed") ); return false; } @@ -286,7 +280,7 @@ bool wxDIB::Load(const wxString& filename) m_handle = (HBITMAP)::LoadImage ( wxGetInstance(), - filename, + filename.t_str(), IMAGE_BITMAP, 0, 0, // don't specify the size LR_CREATEDIBSECTION | LR_LOADFROMFILE @@ -295,7 +289,7 @@ bool wxDIB::Load(const wxString& filename) if ( !m_handle ) { - wxLogLastError(_T("Loading DIB from file")); + wxLogLastError(wxT("Loading DIB from file")); return false; } @@ -305,8 +299,9 @@ bool wxDIB::Load(const wxString& filename) bool wxDIB::Save(const wxString& filename) { - wxCHECK_MSG( m_handle, false, _T("wxDIB::Save(): invalid object") ); + wxCHECK_MSG( m_handle, false, wxT("wxDIB::Save(): invalid object") ); +#if wxUSE_FILE wxFile file(filename, wxFile::write); bool ok = file.IsOpened(); if ( ok ) @@ -314,7 +309,7 @@ bool wxDIB::Save(const wxString& filename) DIBSECTION ds; if ( !GetDIBSection(m_handle, &ds) ) { - wxLogLastError(_T("GetObject(hDIB)")); + wxLogLastError(wxT("GetObject(hDIB)")); } else { @@ -335,6 +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 ) { @@ -363,7 +361,7 @@ void wxDIB::DoGetObject() const DIBSECTION ds; if ( !GetDIBSection(m_handle, &ds) ) { - wxLogLastError(_T("GetObject(hDIB)")); + wxLogLastError(wxT("GetObject(hDIB)")); return; } @@ -384,23 +382,47 @@ void wxDIB::DoGetObject() const HBITMAP wxDIB::CreateDDB(HDC hdc) const { - wxCHECK_MSG( m_handle, 0, _T("wxDIB::CreateDDB(): invalid object") ); + wxCHECK_MSG( m_handle, 0, wxT("wxDIB::CreateDDB(): invalid object") ); DIBSECTION ds; if ( !GetDIBSection(m_handle, &ds) ) { - wxLogLastError(_T("GetObject(hDIB)")); + wxLogLastError(wxT("GetObject(hDIB)")); 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 */ HBITMAP wxDIB::ConvertToBitmap(const BITMAPINFO *pbmi, HDC hdc, void *bits) { - wxCHECK_MSG( pbmi, 0, _T("invalid DIB in ConvertToBitmap") ); + wxCHECK_MSG( pbmi, 0, wxT("invalid DIB in ConvertToBitmap") ); // here we get BITMAPINFO struct followed by the actual bitmap bits and // BITMAPINFO starts with BITMAPINFOHEADER followed by colour info @@ -536,17 +558,17 @@ HGLOBAL wxDIB::ConvertFromBitmap(HBITMAP hbmp) { // this is an error which does risk to happen especially under Win9x // and which the user may understand so let him know about it - wxLogError(_("Failed to allocated %luKb of memory for bitmap data."), + wxLogError(_("Failed to allocate %luKb of memory for bitmap data."), (unsigned long)(size / 1024)); 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? - wxFAIL_MSG( _T("wxDIB::ConvertFromBitmap() unexpectedly failed") ); + wxFAIL_MSG( wxT("wxDIB::ConvertFromBitmap() unexpectedly failed") ); return NULL; } @@ -564,12 +586,16 @@ HGLOBAL wxDIB::ConvertFromBitmap(HBITMAP hbmp) wxPalette *wxDIB::CreatePalette() const { - wxCHECK_MSG( m_handle, NULL, _T("wxDIB::CreatePalette(): invalid object") ); + // GetDIBColorTable not available in eVC3 +#if defined(_WIN32_WCE) && _WIN32_WCE < 400 + return NULL; +#else + wxCHECK_MSG( m_handle, NULL, wxT("wxDIB::CreatePalette(): invalid object") ); DIBSECTION ds; if ( !GetDIBSection(m_handle, &ds) ) { - wxLogLastError(_T("GetObject(hDIB)")); + wxLogLastError(wxT("GetObject(hDIB)")); return 0; } @@ -591,18 +617,23 @@ 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 *) malloc(sizeof(LOGPALETTE) + (biClrUsed - 1)*sizeof(PALETTEENTRY)); - wxCHECK_MSG( pPalette, NULL, _T("out of memory") ); + wxCHECK_MSG( pPalette, NULL, wxT("out of memory") ); // initialize the palette header pPalette->palVersion = 0x300; // magic number, not in docs but works 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; @@ -617,7 +648,7 @@ wxPalette *wxDIB::CreatePalette() const if ( !hPalette ) { - wxLogLastError(_T("CreatePalette")); + wxLogLastError(wxT("CreatePalette")); return NULL; } @@ -626,6 +657,7 @@ wxPalette *wxDIB::CreatePalette() const palette->SetHPALETTE((WXHPALETTE)hPalette); return palette; +#endif } #endif // wxUSE_PALETTE @@ -638,7 +670,7 @@ wxPalette *wxDIB::CreatePalette() const bool wxDIB::Create(const wxImage& image) { - wxCHECK_MSG( image.Ok(), false, _T("invalid wxImage in wxDIB ctor") ); + wxCHECK_MSG( image.Ok(), false, wxT("invalid wxImage in wxDIB ctor") ); const int h = image.GetHeight(); const int w = image.GetWidth(); @@ -741,14 +773,26 @@ wxImage wxDIB::ConvertToImage() const dst[1] = *src++; dst[0] = *src++; - dst += 3; - if ( is32bit ) { if ( alpha ) - *alpha++ = *src; + { + // 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; + } + } + src++; } + + dst += 3; } // pass to the previous line in the image @@ -766,4 +810,3 @@ wxImage wxDIB::ConvertToImage() const #endif // wxUSE_IMAGE #endif // wxUSE_WXDIB -