-/////////////////////////////////////////////////////////////////////////////
-// Name: bitmap.cpp
+////////////////////////////////////////////////////////////////////////////
+// Name: src/msw/bitmap.cpp
// Purpose: wxBitmap
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) Julian Smart and Markus Holzem
-// Licence: wxWindows license
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation "bitmap.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
+#include "wx/bitmap.h"
+
#ifndef WX_PRECOMP
#include <stdio.h>
#include "wx/app.h"
#include "wx/palette.h"
#include "wx/dcmemory.h"
- #include "wx/bitmap.h"
#include "wx/icon.h"
+ #include "wx/log.h"
+ #include "wx/image.h"
#endif
#include "wx/msw/private.h"
-#include "wx/log.h"
+#include "wx/msw/dc.h"
-#if !defined(__WXMICROWIN__)
-#include "wx/msw/dib.h"
+#if wxUSE_WXDIB
+ #include "wx/msw/dib.h"
#endif
-#include "wx/image.h"
-#include "wx/xpmdecod.h"
+#ifdef wxHAS_RAW_BITMAP
+ #include "wx/rawbmp.h"
+#endif
// missing from mingw32 header
#ifndef CLR_INVALID
#define CLR_INVALID ((COLORREF)-1)
#endif // no CLR_INVALID
+// ----------------------------------------------------------------------------
+// Bitmap data
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxBitmapRefData : public wxGDIImageRefData
+{
+public:
+ wxBitmapRefData();
+ wxBitmapRefData(const wxBitmapRefData& data);
+ virtual ~wxBitmapRefData() { Free(); }
+
+ virtual void Free();
+
+ // set the mask object to use as the mask, we take ownership of it
+ void SetMask(wxMask *mask)
+ {
+ delete m_bitmapMask;
+ m_bitmapMask = mask;
+ }
+
+ // set the HBITMAP to use as the mask
+ void SetMask(HBITMAP hbmpMask)
+ {
+ SetMask(new wxMask((WXHBITMAP)hbmpMask));
+ }
+
+ // return the mask
+ wxMask *GetMask() const { return m_bitmapMask; }
+
+public:
+#if wxUSE_PALETTE
+ wxPalette m_bitmapPalette;
+#endif // wxUSE_PALETTE
+
+ // MSW-specific
+ // ------------
+
+#ifdef __WXDEBUG__
+ // this field is solely for error checking: we detect selecting a bitmap
+ // into more than one DC at once or deleting a bitmap still selected into a
+ // DC (both are serious programming errors under Windows)
+ wxDC *m_selectedInto;
+#endif // __WXDEBUG__
+
+#if wxUSE_WXDIB
+ // when GetRawData() is called for a DDB we need to convert it to a DIB
+ // first to be able to provide direct access to it and we cache that DIB
+ // here and convert it back to DDB when UngetRawData() is called
+ wxDIB *m_dib;
+#endif
+
+ // true if we have alpha transparency info and can be drawn using
+ // AlphaBlend()
+ bool m_hasAlpha;
+
+ // true if our HBITMAP is a DIB section, false if it is a DDB
+ bool m_isDIB;
+
+private:
+ // optional mask for transparent drawing
+ wxMask *m_bitmapMask;
+
+
+ // not implemented
+ wxBitmapRefData& operator=(const wxBitmapRefData&);
+};
+
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
// implementation
// ============================================================================
+// ----------------------------------------------------------------------------
+// helper functions
+// ----------------------------------------------------------------------------
+
+// decide whether we should create a DIB or a DDB for the given parameters
+//
+// NB: we always use DIBs under Windows CE as this is much simpler (even if
+// also less efficient...) and we obviously can't use them if there is no
+// DIB support compiled in at all
+#ifdef __WXWINCE__
+ static inline bool wxShouldCreateDIB(int, int, int, WXHDC) { return true; }
+
+ #define ALWAYS_USE_DIB
+#elif !wxUSE_WXDIB
+ // no sense in defining wxShouldCreateDIB() as we can't compile code
+ // executed if it is true, so we have to use #if's anyhow
+ #define NEVER_USE_DIB
+#else // wxUSE_WXDIB && !__WXWINCE__
+ static inline bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc)
+ {
+ // here is the logic:
+ //
+ // (a) if hdc is specified, the caller explicitly wants DDB
+ // (b) otherwise, create a DIB if depth >= 24 (we don't support 16bpp
+ // or less DIBs anyhow)
+ // (c) finally, create DIBs under Win9x even if the depth hasn't been
+ // explicitly specified but the current display depth is 24 or
+ // more and the image is "big", i.e. > 16Mb which is the
+ // theoretical limit for DDBs under Win9x
+ //
+ // consequences (all of which seem to make sense):
+ //
+ // (i) by default, DDBs are created (depth == -1 usually)
+ // (ii) DIBs can be created by explicitly specifying the depth
+ // (iii) using a DC always forces creating a DDB
+ return !hdc &&
+ (d >= 24 ||
+ (d == -1 &&
+ wxDIB::GetLineSize(w, wxDisplayDepth())*h > 16*1024*1024));
+ }
+
+ #define SOMETIMES_USE_DIB
+#endif // different DIB usage scenarious
+
// ----------------------------------------------------------------------------
// wxBitmapRefData
// ----------------------------------------------------------------------------
wxBitmapRefData::wxBitmapRefData()
{
- m_quality = 0;
+#ifdef __WXDEBUG__
m_selectedInto = NULL;
- m_numColors = 0;
+#endif
m_bitmapMask = NULL;
+
m_hBitmap = (WXHBITMAP) NULL;
+#if wxUSE_WXDIB
+ m_dib = NULL;
+#endif
+
+ m_isDIB =
+ m_hasAlpha = false;
+}
+
+wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
+ : wxGDIImageRefData(data)
+{
+#ifdef __WXDEBUG__
+ m_selectedInto = NULL;
+#endif
+
+ // (deep) copy the mask if present
+ m_bitmapMask = NULL;
+ if (data.m_bitmapMask)
+ m_bitmapMask = new wxMask(*data.m_bitmapMask);
+
+ // FIXME: we don't copy m_hBitmap currently but we should, see wxBitmap::
+ // CloneGDIRefData()
+
+ wxASSERT_MSG( !data.m_isDIB,
+ _T("can't copy bitmap locked for raw access!") );
+ m_isDIB = false;
+
+ m_hasAlpha = data.m_hasAlpha;
}
void wxBitmapRefData::Free()
wxASSERT_MSG( !m_selectedInto,
wxT("deleting bitmap still selected into wxMemoryDC") );
+#if wxUSE_WXDIB
+ wxASSERT_MSG( !m_dib, _T("forgot to call wxBitmap::UngetRawData()!") );
+#endif
+
if ( m_hBitmap)
{
if ( !::DeleteObject((HBITMAP)m_hBitmap) )
// wxBitmap creation
// ----------------------------------------------------------------------------
-// this function should be called from all wxBitmap ctors
-void wxBitmap::Init()
+wxGDIImageRefData *wxBitmap::CreateData() const
{
- // m_refData = NULL; done in the base class ctor
-
+ return new wxBitmapRefData;
}
-#ifdef __WIN32__
+wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *dataOrig) const
+{
+ const wxBitmapRefData *
+ data = wx_static_cast(const wxBitmapRefData *, dataOrig);
+ if ( !data )
+ return NULL;
+
+ // FIXME: this method is backwards, it should just create a new
+ // wxBitmapRefData using its copy ctor but instead it modifies this
+ // bitmap itself and then returns its m_refData -- which works, of
+ // course (except in !wxUSE_WXDIB), but is completely illogical
+ wxBitmap *self = wx_const_cast(wxBitmap *, this);
+
+ wxBitmapRefData *selfdata;
+#if wxUSE_WXDIB
+ // copy the other bitmap
+ if ( data->m_hBitmap )
+ {
+ wxDIB dib((HBITMAP)(data->m_hBitmap));
+ self->CopyFromDIB(dib);
-bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
+ selfdata = wx_static_cast(wxBitmapRefData *, m_refData);
+ selfdata->m_hasAlpha = data->m_hasAlpha;
+ }
+ else
+#endif // wxUSE_WXDIB
+ {
+ // copy the bitmap data
+ selfdata = new wxBitmapRefData(*data);
+ self->m_refData = selfdata;
+ }
+
+ // copy also the mask
+ wxMask * const maskSrc = data->GetMask();
+ if ( maskSrc )
+ {
+ selfdata->SetMask(new wxMask(*maskSrc));
+ }
+
+ return selfdata;
+}
+
+bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon,
+ wxBitmapTransparency transp)
{
-#ifndef __WXMICROWIN__
+#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
// it may be either HICON or HCURSOR
HICON hicon = (HICON)icon.GetHandle();
{
wxLogLastError(wxT("GetIconInfo"));
- return FALSE;
+ return false;
}
wxBitmapRefData *refData = new wxBitmapRefData;
refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
- // the mask returned by GetIconInfo() is inversed compared to the usual
- // wxWin convention
- refData->m_bitmapMask = new wxMask((WXHBITMAP)
- wxInvertMask(iconInfo.hbmMask, w, h));
+ switch ( transp )
+ {
+ default:
+ wxFAIL_MSG( _T("unknown wxBitmapTransparency value") );
+
+ case wxBitmapTransparency_None:
+ // nothing to do, refData->m_hasAlpha is false by default
+ break;
+
+ case wxBitmapTransparency_Auto:
+#if wxUSE_WXDIB
+ // If the icon is 32 bits per pixel then it may have alpha channel
+ // data, although there are some icons that are 32 bpp but have no
+ // alpha... So convert to a DIB and manually check the 4th byte for
+ // each pixel.
+ {
+ BITMAP bm;
+ if ( ::GetObject(iconInfo.hbmColor, sizeof(bm), &bm) &&
+ (bm.bmBitsPixel == 32) )
+ {
+ wxDIB dib(iconInfo.hbmColor);
+ if (dib.IsOk())
+ {
+ const unsigned char* pixels = dib.GetData();
+ for (int idx = 0; idx < w*h*4; idx+=4)
+ {
+ if (pixels[idx+3] != 0)
+ {
+ // If there is an alpha byte that is non-zero
+ // then set the alpha flag and stop checking
+ refData->m_hasAlpha = true;
+ break;
+ }
+ }
+ }
+ }
+ }
+ break;
+#endif // wxUSE_WXDIB
+ case wxBitmapTransparency_Always:
+ refData->m_hasAlpha = true;
+ break;
+ }
+
+ if ( !refData->m_hasAlpha )
+ {
+ // the mask returned by GetIconInfo() is inverted compared to the usual
+ // wxWin convention
+ refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
+ }
// delete the old one now as we don't need it any more
::DeleteObject(iconInfo.hbmMask);
-#if WXWIN_COMPATIBILITY_2
- refData->m_ok = TRUE;
-#endif // WXWIN_COMPATIBILITY_2
+ return true;
+#else // __WXMICROWIN__ || __WXWINCE__
+ wxUnusedVar(icon);
+ wxUnusedVar(transp);
- return TRUE;
-#else
- return FALSE;
-#endif
+ return false;
+#endif // !__WXWINCE__/__WXWINCE__
}
-#endif // Win32
-
-bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
+bool wxBitmap::CopyFromCursor(const wxCursor& cursor, wxBitmapTransparency transp)
{
UnRef();
if ( !cursor.Ok() )
- return FALSE;
+ return false;
-#ifdef __WIN16__
- wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
-
- return FALSE;
-#else
- return CopyFromIconOrCursor(cursor);
-#endif // Win16
+ return CopyFromIconOrCursor(cursor, transp);
}
-bool wxBitmap::CopyFromIcon(const wxIcon& icon)
+bool wxBitmap::CopyFromIcon(const wxIcon& icon, wxBitmapTransparency transp)
{
UnRef();
if ( !icon.Ok() )
- return FALSE;
+ return false;
+
+ return CopyFromIconOrCursor(icon, transp);
+}
- // GetIconInfo() doesn't exist under Win16 and I don't know any other way
- // to create a bitmap from icon there - but using this way we won't have
- // the mask (FIXME)
-#ifdef __WIN16__
- int width = icon.GetWidth(),
- height = icon.GetHeight();
+#ifndef NEVER_USE_DIB
- // copy the icon to the bitmap
- ScreenHDC hdcScreen;
- HDC hdc = ::CreateCompatibleDC(hdcScreen);
- HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
- HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
+bool wxBitmap::CopyFromDIB(const wxDIB& dib)
+{
+ wxCHECK_MSG( dib.IsOk(), false, _T("invalid DIB in CopyFromDIB") );
- ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
+#ifdef SOMETIMES_USE_DIB
+ HBITMAP hbitmap = dib.CreateDDB();
+ if ( !hbitmap )
+ return false;
+#else // ALWAYS_USE_DIB
+ HBITMAP hbitmap = ((wxDIB &)dib).Detach(); // const_cast
+#endif // SOMETIMES_USE_DIB/ALWAYS_USE_DIB
- ::SelectObject(hdc, hbmpOld);
- ::DeleteDC(hdc);
+ UnRef();
wxBitmapRefData *refData = new wxBitmapRefData;
m_refData = refData;
- refData->m_width = width;
- refData->m_height = height;
- refData->m_depth = wxDisplayDepth();
+ refData->m_width = dib.GetWidth();
+ refData->m_height = dib.GetHeight();
+ refData->m_depth = dib.GetDepth();
refData->m_hBitmap = (WXHBITMAP)hbitmap;
-#if WXWIN_COMPATIBILITY_2
- refData->m_ok = TRUE;
-#endif // WXWIN_COMPATIBILITY_2
+#if wxUSE_PALETTE
+ wxPalette *palette = dib.CreatePalette();
+ if ( palette )
+ {
+ refData->m_bitmapPalette = *palette;
+ }
+
+ delete palette;
+#endif // wxUSE_PALETTE
- return TRUE;
-#else // Win32
- return CopyFromIconOrCursor(icon);
-#endif // Win16/Win32
+ return true;
}
+#endif // NEVER_USE_DIB
+
wxBitmap::~wxBitmap()
{
}
wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
{
- Init();
-
#ifndef __WXMICROWIN__
wxBitmapRefData *refData = new wxBitmapRefData;
m_refData = refData;
refData->m_width = width;
refData->m_height = height;
refData->m_depth = depth;
- refData->m_numColors = 0;
- refData->m_selectedInto = NULL;
char *data;
if ( depth == 1 )
{
// we assume that it is in XBM format which is not quite the same as
// the format CreateBitmap() wants because the order of bytes in the
- // line is inversed!
+ // line is reversed!
const size_t bytesPerLine = (width + 7) / 8;
const size_t padding = bytesPerLine % 2;
const size_t len = height * ( padding + bytesPerLine );
for ( int bits = 0; bits < 8; bits++)
{
reversed <<= 1;
- reversed |= (val & 0x01);
+ reversed |= (unsigned char)(val & 0x01);
val >>= 1;
}
- *dst++ = reversed;
+ *dst++ = ~reversed;
}
if ( padding )
#endif
}
-// Create from XPM data
-bool wxBitmap::CreateFromXpm(const char **data)
-{
-#if wxUSE_IMAGE && wxUSE_XPM
- Init();
-
- wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
-
- wxXPMDecoder decoder;
- wxImage img = decoder.ReadData(data);
- wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
-
- *this = wxBitmap(img);
- return TRUE;
-#else
- return FALSE;
-#endif
-}
-
wxBitmap::wxBitmap(int w, int h, int d)
{
- Init();
-
(void)Create(w, h, d);
}
-wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
+wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
{
- Init();
+ (void)Create(w, h, dc);
+}
+wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
+{
(void)Create(data, type, width, height, depth);
}
wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
{
- Init();
+ LoadFile(filename, type);
+}
- LoadFile(filename, (int)type);
+bool wxBitmap::Create(int width, int height, int depth)
+{
+ return DoCreate(width, height, depth, 0);
}
-bool wxBitmap::Create(int w, int h, int d)
+bool wxBitmap::Create(int width, int height, const wxDC& dc)
+{
+ wxCHECK_MSG( dc.IsOk(), false, _T("invalid HDC in wxBitmap::Create()") );
+
+ const wxMSWDCImpl *impl = wxDynamicCast( dc.GetImpl(), wxMSWDCImpl );
+
+ if (impl)
+ return DoCreate(width, height, -1, impl->GetHDC());
+ else
+ return false;
+}
+
+bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
{
-#ifndef __WXMICROWIN__
UnRef();
m_refData = new wxBitmapRefData;
GetBitmapData()->m_width = w;
GetBitmapData()->m_height = h;
- GetBitmapData()->m_depth = d;
- HBITMAP hbmp;
+ HBITMAP hbmp wxDUMMY_INITIALIZE(0);
- if ( d > 0 )
+#ifndef NEVER_USE_DIB
+ if ( wxShouldCreateDIB(w, h, d, hdc) )
{
- hbmp = ::CreateBitmap(w, h, 1, d, NULL);
- if ( !hbmp )
+ if ( d == -1 )
{
- wxLogLastError(wxT("CreateBitmap"));
+ // create DIBs without alpha channel by default
+ d = 24;
}
+
+ wxDIB dib(w, h, d);
+ if ( !dib.IsOk() )
+ return false;
+
+ // don't delete the DIB section in dib object dtor
+ hbmp = dib.Detach();
+
+ GetBitmapData()->m_isDIB = true;
+ GetBitmapData()->m_depth = d;
}
- else
+ else // create a DDB
+#endif // NEVER_USE_DIB
{
- ScreenHDC dc;
- hbmp = ::CreateCompatibleBitmap(dc, w, h);
- if ( !hbmp )
+#ifndef ALWAYS_USE_DIB
+#ifndef __WXMICROWIN__
+ if ( d > 0 )
{
- wxLogLastError(wxT("CreateCompatibleBitmap"));
+ hbmp = ::CreateBitmap(w, h, 1, d, NULL);
+ if ( !hbmp )
+ {
+ wxLogLastError(wxT("CreateBitmap"));
+ }
+
+ GetBitmapData()->m_depth = d;
}
+ else // d == 0, create bitmap compatible with the screen
+#endif // !__WXMICROWIN__
+ {
+ ScreenHDC dc;
+ hbmp = ::CreateCompatibleBitmap(dc, w, h);
+ if ( !hbmp )
+ {
+ wxLogLastError(wxT("CreateCompatibleBitmap"));
+ }
- GetBitmapData()->m_depth = wxDisplayDepth();
+ GetBitmapData()->m_depth = wxDisplayDepth();
+ }
+#endif // !ALWAYS_USE_DIB
}
SetHBITMAP((WXHBITMAP)hbmp);
-#if WXWIN_COMPATIBILITY_2
- GetBitmapData()->m_ok = hbmp != 0;
-#endif // WXWIN_COMPATIBILITY_2
return Ok();
-#else
- return FALSE;
-#endif
}
+#if wxUSE_IMAGE
+
// ----------------------------------------------------------------------------
-// wxImage to/from conversions
+// wxImage to/from conversions for Microwin
// ----------------------------------------------------------------------------
-#if wxUSE_IMAGE
+// Microwin versions are so different from normal ones that it really doesn't
+// make sense to use #ifdefs inside the function bodies
+#ifdef __WXMICROWIN__
-bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
{
-#ifdef __WXMICROWIN__
- // TODO
- return FALSE;
-#else
- wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
+ // Set this to 1 to experiment with mask code,
+ // which currently doesn't work
+ #define USE_MASKS 0
m_refData = new wxBitmapRefData();
- // sizeLimit is the MS upper limit for the DIB size
-#ifdef WIN32
- int sizeLimit = 1024*768*3;
-#else
- int sizeLimit = 0x7fff ;
-#endif
+ // Initial attempt at a simple-minded implementation.
+ // The bitmap will always be created at the screen depth,
+ // so the 'depth' argument is ignored.
- // width and height of the device-dependent bitmap
- int width = image.GetWidth();
- int bmpHeight = image.GetHeight();
-
- // calc the number of bytes per scanline and padding
- int bytePerLine = width*3;
- int sizeDWORD = sizeof( DWORD );
- int lineBoundary = bytePerLine % sizeDWORD;
- int padding = 0;
- if( lineBoundary > 0 )
- {
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
- }
- // calc the number of DIBs and heights of DIBs
- int numDIB = 1;
- int hRemain = 0;
- int height = sizeLimit/bytePerLine;
- if( height >= bmpHeight )
- height = bmpHeight;
- else
- {
- numDIB = bmpHeight / height;
- hRemain = bmpHeight % height;
- if( hRemain >0 ) numDIB++;
- }
-
- // set bitmap parameters
- wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
- SetWidth( width );
- SetHeight( bmpHeight );
- if (depth == -1) depth = wxDisplayDepth();
- SetDepth( depth );
-
- // Copy the palette from the source image
- SetPalette(image.GetPalette());
+ HDC hScreenDC = ::GetDC(NULL);
+ int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
- wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") );
- // Fill in the DIB header
- lpDIBh->bmiHeader.biSize = headersize;
- lpDIBh->bmiHeader.biWidth = (DWORD)width;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- // the general formula for biSizeImage:
- // ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
- lpDIBh->bmiHeader.biPlanes = 1;
- lpDIBh->bmiHeader.biBitCount = 24;
- lpDIBh->bmiHeader.biCompression = BI_RGB;
- lpDIBh->bmiHeader.biClrUsed = 0;
- // These seem not really needed for our purpose here.
- lpDIBh->bmiHeader.biClrImportant = 0;
- lpDIBh->bmiHeader.biXPelsPerMeter = 0;
- lpDIBh->bmiHeader.biYPelsPerMeter = 0;
- // memory for DIB data
- unsigned char *lpBits;
- lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
- if( !lpBits )
- {
- wxFAIL_MSG( wxT("could not allocate memory for DIB") );
- free( lpDIBh );
- return FALSE;
- }
-
- // create and set the device-dependent bitmap
- HDC hdc = ::GetDC(NULL);
- HDC memdc = ::CreateCompatibleDC( hdc );
- HBITMAP hbitmap;
- hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
- ::SelectObject( memdc, hbitmap);
+ HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
+ HBITMAP hMaskBitmap = NULL;
+ HBITMAP hOldMaskBitmap = NULL;
+ HDC hMaskDC = NULL;
+ unsigned char maskR = 0;
+ unsigned char maskG = 0;
+ unsigned char maskB = 0;
-#if wxUSE_PALETTE
- HPALETTE hOldPalette = 0;
- if (image.GetPalette().Ok())
+ // printf("Created bitmap %d\n", (int) hBitmap);
+ if (hBitmap == NULL)
{
- hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
- ::RealizePalette(memdc);
+ ::ReleaseDC(NULL, hScreenDC);
+ return false;
}
-#endif // wxUSE_PALETTE
+ HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
- // copy image data into DIB data and then into DDB (in a loop)
- unsigned char *data = image.GetData();
- int i, j, n;
- int origin = 0;
- unsigned char *ptdata = data;
- unsigned char *ptbits;
+ HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
+ ::ReleaseDC(NULL, hScreenDC);
- for( n=0; n<numDIB; n++ )
+ // created an mono-bitmap for the possible mask
+ bool hasMask = image.HasMask();
+
+ if ( hasMask )
{
- if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
+#if USE_MASKS
+ // FIXME: we should be able to pass bpp = 1, but
+ // GdBlit can't handle a different depth
+#if 0
+ hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL );
+#else
+ hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight());
+#endif
+ maskR = image.GetMaskRed();
+ maskG = image.GetMaskGreen();
+ maskB = image.GetMaskBlue();
+
+ if (!hMaskBitmap)
+ {
+ hasMask = false;
+ }
+ else
{
- // redefine height and size of the (possibly) last smaller DIB
- // memory is not reallocated
- height = hRemain;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
+ hScreenDC = ::GetDC(NULL);
+ hMaskDC = ::CreateCompatibleDC(hScreenDC);
+ ::ReleaseDC(NULL, hScreenDC);
+
+ hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
}
- ptbits = lpBits;
+#else
+ hasMask = false;
+#endif
+ }
- for( j=0; j<height; j++ )
+ int i, j;
+ for (i = 0; i < image.GetWidth(); i++)
+ {
+ for (j = 0; j < image.GetHeight(); j++)
{
- for( i=0; i<width; i++ )
+ unsigned char red = image.GetRed(i, j);
+ unsigned char green = image.GetGreen(i, j);
+ unsigned char blue = image.GetBlue(i, j);
+
+ ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
+
+ if (hasMask)
{
- *(ptbits++) = *(ptdata+2);
- *(ptbits++) = *(ptdata+1);
- *(ptbits++) = *(ptdata );
- ptdata += 3;
+ // scan the bitmap for the transparent colour and set the corresponding
+ // pixels in the mask to BLACK and the rest to WHITE
+ if (maskR == red && maskG == green && maskB == blue)
+ ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
+ else
+ ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
}
- for( i=0; i< padding; i++ ) *(ptbits++) = 0;
}
- ::StretchDIBits( memdc, 0, origin, width, height,\
- 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
- origin += height;
- // if numDIB = 1, lines below can also be used
- // hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
- // The above line is equivalent to the following two lines.
- // hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
- // ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
- // or the following lines
- // hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
- // HDC memdc = ::CreateCompatibleDC( hdc );
- // ::SelectObject( memdc, hbitmap);
- // ::SetDIBitsToDevice( memdc, 0, 0, width, height,
- // 0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
- // ::SelectObject( memdc, 0 );
- // ::DeleteDC( memdc );
- }
- SetHBITMAP( (WXHBITMAP) hbitmap );
+ }
+
+ ::SelectObject(hMemDC, hOldBitmap);
+ ::DeleteDC(hMemDC);
+ if (hasMask)
+ {
+ ::SelectObject(hMaskDC, hOldMaskBitmap);
+ ::DeleteDC(hMaskDC);
+
+ ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap);
+ }
+
+ SetWidth(image.GetWidth());
+ SetHeight(image.GetHeight());
+ SetDepth(screenDepth);
+ SetHBITMAP( (WXHBITMAP) hBitmap );
#if wxUSE_PALETTE
- if (hOldPalette)
- SelectPalette(memdc, hOldPalette, FALSE);
+ // Copy the palette from the source image
+ SetPalette(image.GetPalette());
#endif // wxUSE_PALETTE
- // similarly, created an mono-bitmap for the possible mask
- if( image.HasMask() )
- {
- hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
- HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap);
- if( numDIB == 1 ) height = bmpHeight;
- else height = sizeLimit/bytePerLine;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- origin = 0;
- unsigned char r = image.GetMaskRed();
- unsigned char g = image.GetMaskGreen();
- unsigned char b = image.GetMaskBlue();
- unsigned char zero = 0, one = 255;
- ptdata = data;
- for( n=0; n<numDIB; n++ )
- {
- if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
- {
- // redefine height and size of the (possibly) last smaller DIB
- // memory is not reallocated
- height = hRemain;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- }
- ptbits = lpBits;
- for( int j=0; j<height; j++ )
- {
- for(i=0; i<width; i++ )
- {
- // was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
- unsigned char cr = (*(ptdata++)) ;
- unsigned char cg = (*(ptdata++)) ;
- unsigned char cb = (*(ptdata++)) ;
-
- if( ( cr !=r) || (cg!=g) || (cb!=b) )
- {
- *(ptbits++) = one;
- *(ptbits++) = one;
- *(ptbits++) = one;
- }
- else
- {
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- }
- }
- for( i=0; i< padding; i++ ) *(ptbits++) = zero;
- }
- ::StretchDIBits( memdc, 0, origin, width, height,\
- 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
- origin += height;
- }
- // create a wxMask object
- wxMask *mask = new wxMask();
- mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
- SetMask( mask );
- // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
- /* The following can also be used but is slow to run
- wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
- wxMask *mask = new wxMask( *this, colour );
- SetMask( mask );
- */
-
- ::SelectObject( memdc, hbmpOld );
- }
-
- // free allocated resources
- ::DeleteDC( memdc );
- ::ReleaseDC(NULL, hdc);
- free(lpDIBh);
- free(lpBits);
-
-#if WXWIN_COMPATIBILITY_2
- // check the wxBitmap object
- GetBitmapData()->SetOk();
-#endif // WXWIN_COMPATIBILITY_2
-
- return TRUE;
-#endif
+ return true;
}
wxImage wxBitmap::ConvertToImage() const
{
-#ifdef __WXMICROWIN__
- // TODO
- return wxImage();
-#else
+ // Initial attempt at a simple-minded implementation.
+ // The bitmap will always be created at the screen depth,
+ // so the 'depth' argument is ignored.
+ // TODO: transparency (create a mask image)
+
+ if (!Ok())
+ {
+ wxFAIL_MSG( wxT("bitmap is invalid") );
+ return wxNullImage;
+ }
+
wxImage image;
wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
return wxNullImage;
}
- // calc the number of bytes per scanline and padding in the DIB
- int bytePerLine = width*3;
- int sizeDWORD = sizeof( DWORD );
- int lineBoundary = bytePerLine % sizeDWORD;
- int padding = 0;
- if( lineBoundary > 0 )
+ HDC hScreenDC = ::GetDC(NULL);
+
+ HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
+ ::ReleaseDC(NULL, hScreenDC);
+
+ HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
+
+ HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
+
+ int i, j;
+ for (i = 0; i < GetWidth(); i++)
{
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
+ for (j = 0; j < GetHeight(); j++)
+ {
+ COLORREF color = ::GetPixel(hMemDC, i, j);
+ unsigned char red = GetRValue(color);
+ unsigned char green = GetGValue(color);
+ unsigned char blue = GetBValue(color);
+
+ image.SetRGB(i, j, red, green, blue);
+ }
}
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
- if( !lpDIBh )
+ ::SelectObject(hMemDC, hOldBitmap);
+ ::DeleteDC(hMemDC);
+
+#if wxUSE_PALETTE
+ // Copy the palette from the source image
+ if (GetPalette())
+ image.SetPalette(* GetPalette());
+#endif // wxUSE_PALETTE
+
+ return image;
+}
+
+#endif // __WXMICROWIN__
+
+// ----------------------------------------------------------------------------
+// wxImage to/from conversions
+// ----------------------------------------------------------------------------
+
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
+{
+ return CreateFromImage(image, depth, 0);
+}
+
+bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
+{
+ wxCHECK_MSG( dc.IsOk(), false,
+ _T("invalid HDC in wxBitmap::CreateFromImage()") );
+
+ const wxMSWDCImpl *impl = wxDynamicCast( dc.GetImpl(), wxMSWDCImpl );
+
+ if (impl)
+ return CreateFromImage(image, -1, impl->GetHDC());
+ else
+ return false;
+}
+
+#if wxUSE_WXDIB
+
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
+{
+ wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
+
+ UnRef();
+
+ // first convert the image to DIB
+ const int h = image.GetHeight();
+ const int w = image.GetWidth();
+
+ wxDIB dib(image);
+ if ( !dib.IsOk() )
+ return false;
+
+ const bool hasAlpha = image.HasAlpha();
+
+ // store the bitmap parameters
+ wxBitmapRefData * const refData = new wxBitmapRefData;
+ refData->m_width = w;
+ refData->m_height = h;
+ refData->m_hasAlpha = hasAlpha;
+ refData->m_depth = depth == -1 ? (hasAlpha ? 32 : 24)
+ : depth;
+
+ m_refData = refData;
+
+
+ // next either store DIB as is or create a DDB from it
+ HBITMAP hbitmap wxDUMMY_INITIALIZE(0);
+
+ // are we going to use DIB?
+ //
+ // NB: DDBs don't support alpha so if we have alpha channel we must use DIB
+ if ( hasAlpha || wxShouldCreateDIB(w, h, depth, hdc) )
{
- wxFAIL_MSG( wxT("could not allocate data for DIB header") );
- free( data );
- return wxNullImage;
+ // don't delete the DIB section in dib object dtor
+ hbitmap = dib.Detach();
+
+ refData->m_isDIB = true;
}
- // Fill in the DIB header
- lpDIBh->bmiHeader.biSize = headersize;
- lpDIBh->bmiHeader.biWidth = width;
- lpDIBh->bmiHeader.biHeight = -height;
- lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
- lpDIBh->bmiHeader.biPlanes = 1;
- lpDIBh->bmiHeader.biBitCount = 24;
- lpDIBh->bmiHeader.biCompression = BI_RGB;
- lpDIBh->bmiHeader.biClrUsed = 0;
- // These seem not really needed for our purpose here.
- lpDIBh->bmiHeader.biClrImportant = 0;
- lpDIBh->bmiHeader.biXPelsPerMeter = 0;
- lpDIBh->bmiHeader.biYPelsPerMeter = 0;
- // memory for DIB data
- unsigned char *lpBits;
- lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
- if( !lpBits )
- {
- wxFAIL_MSG( wxT("could not allocate data for DIB") );
- free( data );
- free( lpDIBh );
- return wxNullImage;
+#ifndef ALWAYS_USE_DIB
+ else // we need to convert DIB to DDB
+ {
+ hbitmap = dib.CreateDDB((HDC)hdc);
}
+#endif // !ALWAYS_USE_DIB
- // copy data from the device-dependent bitmap to the DIB
- HDC hdc = ::GetDC(NULL);
- HBITMAP hbitmap;
- hbitmap = (HBITMAP) GetHBITMAP();
- ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+ // validate this object
+ SetHBITMAP((WXHBITMAP)hbitmap);
- // copy DIB data into the wxImage object
- int i, j;
- unsigned char *ptdata = data;
- unsigned char *ptbits = lpBits;
- for( i=0; i<height; i++ )
+ // finally also set the mask if we have one
+ if ( image.HasMask() )
{
- for( j=0; j<width; j++ )
+ const size_t len = 2*((w+15)/16);
+ BYTE *src = image.GetData();
+ BYTE *data = new BYTE[h*len];
+ memset(data, 0, h*len);
+ BYTE r = image.GetMaskRed(),
+ g = image.GetMaskGreen(),
+ b = image.GetMaskBlue();
+ BYTE *dst = data;
+ for ( int y = 0; y < h; y++, dst += len )
{
- *(ptdata++) = *(ptbits+2);
- *(ptdata++) = *(ptbits+1);
- *(ptdata++) = *(ptbits );
- ptbits += 3;
- }
- ptbits += padding;
- }
-
- // similarly, set data according to the possible mask bitmap
- if( GetMask() && GetMask()->GetMaskBitmap() )
- {
- hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
- // memory DC created, color set, data copied, and memory DC deleted
- HDC memdc = ::CreateCompatibleDC( hdc );
- ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
- ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
- ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
- ::DeleteDC( memdc );
- // background color set to RGB(16,16,16) in consistent with wxGTK
- unsigned char r=16, g=16, b=16;
- ptdata = data;
- ptbits = lpBits;
- for( i=0; i<height; i++ )
- {
- for( j=0; j<width; j++ )
+ BYTE *dstLine = dst;
+ BYTE mask = 0x80;
+ for ( int x = 0; x < w; x++, src += 3 )
{
- if( *ptbits != 0 )
- ptdata += 3;
- else
+ if (src[0] != r || src[1] != g || src[2] != b)
+ *dstLine |= mask;
+
+ if ( (mask >>= 1) == 0 )
{
- *(ptdata++) = r;
- *(ptdata++) = g;
- *(ptdata++) = b;
+ dstLine++;
+ mask = 0x80;
}
- ptbits += 3;
}
- ptbits += padding;
}
- image.SetMaskColour( r, g, b );
- image.SetMask( TRUE );
+
+ hbitmap = ::CreateBitmap(w, h, 1, 1, data);
+ if ( !hbitmap )
+ {
+ wxLogLastError(_T("CreateBitmap(mask)"));
+ }
+ else
+ {
+ SetMask(new wxMask((WXHBITMAP)hbitmap));
+ }
+
+ delete[] data;
}
- else
+
+ return true;
+}
+
+wxImage wxBitmap::ConvertToImage() const
+{
+ // convert DDB to DIB
+ wxDIB dib(*this);
+
+ if ( !dib.IsOk() )
{
- image.SetMask( FALSE );
+ return wxNullImage;
+ }
+
+ // and then DIB to our wxImage
+ wxImage image = dib.ConvertToImage();
+ if ( !image.Ok() )
+ {
+ return wxNullImage;
+ }
+
+ // now do the same for the mask, if we have any
+ HBITMAP hbmpMask = GetMask() ? (HBITMAP) GetMask()->GetMaskBitmap() : NULL;
+ if ( hbmpMask )
+ {
+ wxDIB dibMask(hbmpMask);
+ if ( dibMask.IsOk() )
+ {
+ // TODO: use wxRawBitmap to iterate over DIB
+
+ // we hard code the mask colour for now but we could also make an
+ // effort (and waste time) to choose a colour not present in the
+ // image already to avoid having to fudge the pixels below --
+ // whether it's worth to do it is unclear however
+ static const int MASK_RED = 1;
+ static const int MASK_GREEN = 2;
+ static const int MASK_BLUE = 3;
+ static const int MASK_BLUE_REPLACEMENT = 2;
+
+ const int h = dibMask.GetHeight();
+ const int w = dibMask.GetWidth();
+ const int bpp = dibMask.GetDepth();
+ const int maskBytesPerPixel = bpp >> 3;
+ const int maskBytesPerLine = wxDIB::GetLineSize(w, bpp);
+ unsigned char *data = image.GetData();
+
+ // remember that DIBs are stored in bottom to top order
+ unsigned char *
+ maskLineStart = dibMask.GetData() + ((h - 1) * maskBytesPerLine);
+
+ for ( int y = 0; y < h; y++, maskLineStart -= maskBytesPerLine )
+ {
+ // traverse one mask DIB line
+ unsigned char *mask = maskLineStart;
+ for ( int x = 0; x < w; x++, mask += maskBytesPerPixel )
+ {
+ // should this pixel be transparent?
+ if ( *mask )
+ {
+ // no, check that it isn't transparent by accident
+ if ( (data[0] == MASK_RED) &&
+ (data[1] == MASK_GREEN) &&
+ (data[2] == MASK_BLUE) )
+ {
+ // we have to fudge the colour a bit to prevent
+ // this pixel from appearing transparent
+ data[2] = MASK_BLUE_REPLACEMENT;
+ }
+
+ data += 3;
+ }
+ else // yes, transparent pixel
+ {
+ *data++ = MASK_RED;
+ *data++ = MASK_GREEN;
+ *data++ = MASK_BLUE;
+ }
+ }
+ }
+
+ image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
+ }
}
- // free allocated resources
- ::ReleaseDC(NULL, hdc);
- free(lpDIBh);
- free(lpBits);
return image;
-#endif
}
+#else // !wxUSE_WXDIB
+
+bool
+wxBitmap::CreateFromImage(const wxImage& WXUNUSED(image),
+ int WXUNUSED(depth),
+ WXHDC WXUNUSED(hdc))
+{
+ return false;
+}
+
+wxImage wxBitmap::ConvertToImage() const
+{
+ return wxImage();
+}
+
+#endif // wxUSE_WXDIB/!wxUSE_WXDIB
+
#endif // wxUSE_IMAGE
-bool wxBitmap::LoadFile(const wxString& filename, long type)
+// ----------------------------------------------------------------------------
+// loading and saving bitmaps
+// ----------------------------------------------------------------------------
+
+bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
{
UnRef();
return handler->LoadFile(this, filename, type, -1, -1);
}
-#if wxUSE_IMAGE
- else
+#if wxUSE_IMAGE && wxUSE_WXDIB
+ else // no bitmap handler found
{
wxImage image;
if ( image.LoadFile( filename, type ) && image.Ok() )
{
- *this = image.ConvertToBitmap();
+ *this = wxBitmap(image);
- return TRUE;
+ return true;
}
}
#endif // wxUSE_IMAGE
- return FALSE;
+ return false;
}
-bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
+bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
{
UnRef();
if ( !handler )
{
- wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %d defined."), type);
+ wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
- return FALSE;
+ return false;
}
m_refData = new wxBitmapRefData;
}
bool wxBitmap::SaveFile(const wxString& filename,
- int type,
- const wxPalette *palette)
+ wxBitmapType type,
+ const wxPalette *palette) const
{
wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
{
return handler->SaveFile(this, filename, type, palette);
}
-#if wxUSE_IMAGE
- else
+#if wxUSE_IMAGE && wxUSE_WXDIB
+ else // no bitmap handler found
{
// FIXME what about palette? shouldn't we use it?
- wxImage image( *this );
+ wxImage image = ConvertToImage();
if ( image.Ok() )
{
return image.SaveFile(filename, type);
}
#endif // wxUSE_IMAGE
- return FALSE;
+ return false;
}
// ----------------------------------------------------------------------------
// sub bitmap extraction
// ----------------------------------------------------------------------------
+wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect ) const
+{
+ MemoryHDC dcSrc;
+ SelectInHDC selectSrc(dcSrc, GetHbitmap());
+ return GetSubBitmapOfHDC( rect, (WXHDC)dcSrc );
+}
-wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
+wxBitmap wxBitmap::GetSubBitmapOfHDC( const wxRect& rect, WXHDC hdc ) const
{
-#ifndef __WXMICROWIN__
wxCHECK_MSG( Ok() &&
(rect.x >= 0) && (rect.y >= 0) &&
(rect.x+rect.width <= GetWidth()) &&
wxBitmap ret( rect.width, rect.height, GetDepth() );
wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
+#ifndef __WXMICROWIN__
+ // handle alpha channel, if any
+ if (HasAlpha())
+ ret.UseAlpha();
+
// copy bitmap data
- HDC dcSrc = ::CreateCompatibleDC(NULL);
- HDC dcDst = ::CreateCompatibleDC(NULL);
- SelectObject(dcSrc, (HBITMAP) GetHBITMAP());
- SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP());
- BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
+ MemoryHDC dcSrc,
+ dcDst;
+
+ {
+ SelectInHDC selectDst(dcDst, GetHbitmapOf(ret));
+
+ if ( !selectDst )
+ {
+ wxLogLastError(_T("SelectObject(destBitmap)"));
+ }
+
+ if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
+ (HDC)hdc, rect.x, rect.y, SRCCOPY) )
+ {
+ wxLogLastError(_T("BitBlt"));
+ }
+ }
// copy mask if there is one
- if (GetMask())
+ if ( GetMask() )
{
HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
- SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
- SelectObject(dcDst, (HBITMAP) hbmpMask);
- BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
+ SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()),
+ selectDst(dcDst, hbmpMask);
+
+ if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
+ dcSrc, rect.x, rect.y, SRCCOPY) )
+ {
+ wxLogLastError(_T("BitBlt"));
+ }
wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
ret.SetMask(mask);
}
-
- SelectObject(dcDst, NULL);
- SelectObject(dcSrc, NULL);
- DeleteDC(dcDst);
- DeleteDC(dcSrc);
+#endif // !__WXMICROWIN__
return ret;
-#else
- return wxBitmap();
-#endif
}
// ----------------------------------------------------------------------------
// wxBitmap accessors
// ----------------------------------------------------------------------------
-void wxBitmap::SetQuality(int q)
+#if wxUSE_PALETTE
+wxPalette* wxBitmap::GetPalette() const
+{
+ return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
+ : (wxPalette *) NULL;
+}
+#endif
+
+wxMask *wxBitmap::GetMask() const
+{
+ return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
+}
+
+wxBitmap wxBitmap::GetMaskBitmap() const
+{
+ wxBitmap bmp;
+ wxMask *mask = GetMask();
+ if ( mask )
+ bmp.SetHBITMAP(mask->GetMaskBitmap());
+ return bmp;
+}
+
+#ifdef __WXDEBUG__
+
+wxDC *wxBitmap::GetSelectedInto() const
{
- EnsureHasData();
+ return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL;
+}
- GetBitmapData()->m_quality = q;
+#endif
+
+void wxBitmap::UseAlpha()
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_hasAlpha = true;
}
-#if WXWIN_COMPATIBILITY_2
-void wxBitmap::SetOk(bool isOk)
+bool wxBitmap::HasAlpha() const
{
- EnsureHasData();
+ return GetBitmapData() && GetBitmapData()->m_hasAlpha;
+}
- GetBitmapData()->m_ok = isOk;
+// ----------------------------------------------------------------------------
+// wxBitmap setters
+// ----------------------------------------------------------------------------
+
+#ifdef __WXDEBUG__
+
+void wxBitmap::SetSelectedInto(wxDC *dc)
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_selectedInto = dc;
}
-#endif // WXWIN_COMPATIBILITY_2
+
+#endif
#if wxUSE_PALETTE
void wxBitmap::SetPalette(const wxPalette& palette)
{
- EnsureHasData();
+ AllocExclusive();
GetBitmapData()->m_bitmapPalette = palette;
}
void wxBitmap::SetMask(wxMask *mask)
{
- EnsureHasData();
+ AllocExclusive();
- GetBitmapData()->m_bitmapMask = mask;
+ GetBitmapData()->SetMask(mask);
}
-// Creates a bitmap that matches the device context, from
-// an arbitray bitmap. At present, the original bitmap must have an
-// associated palette. TODO: use a default palette if no palette exists.
-// Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
-wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
+// ----------------------------------------------------------------------------
+// raw bitmap access support
+// ----------------------------------------------------------------------------
+
+#ifdef wxHAS_RAW_BITMAP
+
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
{
-#ifdef __WXMICROWIN__
- return wxBitmap();
-#else
- wxMemoryDC memDC;
- wxBitmap tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
- HPALETTE hPal = (HPALETTE) NULL;
- LPBITMAPINFO lpDib;
- void *lpBits = (void*) NULL;
+#if wxUSE_WXDIB
+ if ( !Ok() )
+ {
+ // no bitmap, no data (raw or otherwise)
+ return NULL;
+ }
-#if wxUSE_PALETTE
- if( GetPalette() && GetPalette()->Ok() )
+ // if we're already a DIB we can access our data directly, but if not we
+ // need to convert this DDB to a DIB section and use it for raw access and
+ // then convert it back
+ HBITMAP hDIB;
+ if ( !GetBitmapData()->m_isDIB )
{
- tmpBitmap.SetPalette(*GetPalette());
- memDC.SelectObject(tmpBitmap);
- memDC.SetPalette(*GetPalette());
- hPal = (HPALETTE)GetPalette()->GetHPALETTE();
+ wxCHECK_MSG( !GetBitmapData()->m_dib, NULL,
+ _T("GetRawData() may be called only once") );
+
+ wxDIB *dib = new wxDIB(*this);
+ if ( !dib->IsOk() )
+ {
+ delete dib;
+
+ return NULL;
+ }
+
+ // we'll free it in UngetRawData()
+ GetBitmapData()->m_dib = dib;
+
+ hDIB = dib->GetHandle();
}
- else
+ else // we're a DIB
{
- hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
- wxPalette palette;
- palette.SetHPALETTE( (WXHPALETTE)hPal );
- tmpBitmap.SetPalette( palette );
- memDC.SelectObject(tmpBitmap);
- memDC.SetPalette( palette );
+ hDIB = GetHbitmap();
}
-#else // !wxUSE_PALETTE
- hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
-#endif // wxUSE_PALETTE/!wxUSE_PALETTE
- // set the height negative because in a DIB the order of the lines is
- // reversed
- if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) )
+ DIBSECTION ds;
+ if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
{
- return wxNullBitmap;
+ wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") );
+
+ return NULL;
}
- lpBits = malloc(lpDib->bmiHeader.biSizeImage);
+ // check that the bitmap is in correct format
+ if ( ds.dsBm.bmBitsPixel != bpp )
+ {
+ wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
- ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
+ return NULL;
+ }
+
+ // ok, store the relevant info in wxPixelDataBase
+ const LONG h = ds.dsBm.bmHeight;
- ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0,
- GetWidth(), GetHeight(),
- 0, 0, 0, GetHeight(),
- lpBits, lpDib, DIB_RGB_COLORS);
+ data.m_width = ds.dsBm.bmWidth;
+ data.m_height = h;
- free(lpBits);
+ // remember that DIBs are stored in top to bottom order!
+ // (We can't just use ds.dsBm.bmWidthBytes here, because it isn't always a
+ // multiple of 2, as required by the documentation. So we use the official
+ // formula, which we already use elsewhere.)
+ const LONG bytesPerRow =
+ wxDIB::GetLineSize(ds.dsBm.bmWidth, ds.dsBm.bmBitsPixel);
+ data.m_stride = -bytesPerRow;
- wxFreeDIB(lpDib);
+ char *bits = (char *)ds.dsBm.bmBits;
+ if ( h > 1 )
+ {
+ bits += (h - 1)*bytesPerRow;
+ }
- return tmpBitmap;
+ return bits;
+#else
+ return NULL;
#endif
}
+void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
+{
+#if wxUSE_WXDIB
+ if ( !Ok() )
+ return;
+
+ if ( !&dataBase )
+ {
+ // invalid data, don't crash -- but don't assert neither as we're
+ // called automatically from wxPixelDataBase dtor and so there is no
+ // way to prevent this from happening
+ return;
+ }
+
+ // if we're a DDB we need to convert DIB back to DDB now to make the
+ // changes made via raw bitmap access effective
+ if ( !GetBitmapData()->m_isDIB )
+ {
+ wxDIB *dib = GetBitmapData()->m_dib;
+ GetBitmapData()->m_dib = NULL;
+
+ // TODO: convert
+
+ delete dib;
+ }
+#endif // wxUSE_WXDIB
+}
+#endif // wxHAS_RAW_BITMAP
+
// ----------------------------------------------------------------------------
// wxMask
// ----------------------------------------------------------------------------
m_maskBitmap = 0;
}
+// Copy constructor
+wxMask::wxMask(const wxMask &mask)
+ : wxObject()
+{
+ BITMAP bmp;
+
+ HDC srcDC = CreateCompatibleDC(0);
+ HDC destDC = CreateCompatibleDC(0);
+
+ // GetBitmapDimensionEx won't work if SetBitmapDimensionEx wasn't used
+ // so we'll use GetObject() API here:
+ if (::GetObject((HGDIOBJ)mask.m_maskBitmap, sizeof(bmp), &bmp) == 0)
+ {
+ wxFAIL_MSG(wxT("Cannot retrieve the dimensions of the wxMask to copy"));
+ return;
+ }
+
+ // create our HBITMAP
+ int w = bmp.bmWidth, h = bmp.bmHeight;
+ m_maskBitmap = (WXHBITMAP)CreateCompatibleBitmap(srcDC, w, h);
+
+ // copy the mask's HBITMAP into our HBITMAP
+ SelectObject(srcDC, (HBITMAP) mask.m_maskBitmap);
+ SelectObject(destDC, (HBITMAP) m_maskBitmap);
+
+ BitBlt(destDC, 0, 0, w, h, srcDC, 0, 0, SRCCOPY);
+
+ SelectObject(srcDC, 0);
+ DeleteDC(srcDC);
+ SelectObject(destDC, 0);
+ DeleteDC(destDC);
+}
+
// Construct a mask from a bitmap and a colour indicating
// the transparent area
wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
bool wxMask::Create(const wxBitmap& bitmap)
{
#ifndef __WXMICROWIN__
- wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
+ wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, false,
_T("can't create mask from invalid or not monochrome bitmap") );
if ( m_maskBitmap )
DeleteDC(srcDC);
SelectObject(destDC, 0);
DeleteDC(destDC);
- return TRUE;
+ return true;
#else
- return FALSE;
+ wxUnusedVar(bitmap);
+ return false;
#endif
}
}
#endif // wxUSE_PALETTE
- return FALSE;
+ return false;
}
// Create a mask from a bitmap and a colour indicating
bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
{
#ifndef __WXMICROWIN__
- wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
+ wxCHECK_MSG( bitmap.Ok(), false, _T("invalid bitmap in wxMask::Create") );
if ( m_maskBitmap )
{
// scan the bitmap for the transparent colour and set the corresponding
// pixels in the mask to BLACK and the rest to WHITE
- COLORREF maskColour = RGB(colour.Red(), colour.Green(), colour.Blue());
+ COLORREF maskColour = wxColourToPalRGB(colour);
m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
HDC srcDC = ::CreateCompatibleDC(NULL);
wxLogLastError(wxT("CreateCompatibleDC"));
}
- bool ok = TRUE;
+ bool ok = true;
// SelectObject() will fail
wxASSERT_MSG( !bitmap.GetSelectedInto(),
{
wxLogLastError(wxT("SelectObject"));
- ok = FALSE;
+ ok = false;
}
HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
{
wxLogLastError(wxT("SelectObject"));
- ok = FALSE;
+ ok = false;
}
- // this is not very efficient, but I can't think of a better way of doing
- // it
- for ( int w = 0; ok && (w < width); w++ )
+ if ( ok )
{
- for ( int h = 0; ok && (h < height); h++ )
- {
- COLORREF col = GetPixel(srcDC, w, h);
- if ( col == CLR_INVALID )
- {
- wxLogLastError(wxT("GetPixel"));
-
- // doesn't make sense to continue
- ok = FALSE;
-
- break;
- }
-
- if ( col == maskColour )
- {
- ::SetPixel(destDC, w, h, RGB(0, 0, 0));
- }
- else
- {
- ::SetPixel(destDC, w, h, RGB(255, 255, 255));
- }
- }
+ // this will create a monochrome bitmap with 0 points for the pixels
+ // which have the same value as the background colour and 1 for the
+ // others
+ ::SetBkColor(srcDC, maskColour);
+ ::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY);
}
::SelectObject(srcDC, hbmpSrcOld);
::DeleteDC(destDC);
return ok;
-#else
- return FALSE;
-#endif
+#else // __WXMICROWIN__
+ wxUnusedVar(bitmap);
+ wxUnusedVar(colour);
+ return false;
+#endif // __WXMICROWIN__/!__WXMICROWIN__
}
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
bool wxBitmapHandler::Create(wxGDIImage *image,
- void *data,
- long flags,
+ const void* data,
+ wxBitmapType type,
int width, int height, int depth)
{
wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
- return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
+ return bitmap && Create(bitmap, data, type, width, height, depth);
}
bool wxBitmapHandler::Load(wxGDIImage *image,
const wxString& name,
- long flags,
+ wxBitmapType type,
int width, int height)
{
wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
- return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
+ return bitmap && LoadFile(bitmap, name, type, width, height);
}
-bool wxBitmapHandler::Save(wxGDIImage *image,
+bool wxBitmapHandler::Save(const wxGDIImage *image,
const wxString& name,
- int type)
+ wxBitmapType type) const
{
wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
- return bitmap ? SaveFile(bitmap, name, type) : FALSE;
+ return bitmap && SaveFile(bitmap, name, type);
}
bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
- void *WXUNUSED(data),
- long WXUNUSED(type),
+ const void* WXUNUSED(data),
+ wxBitmapType WXUNUSED(type),
int WXUNUSED(width),
int WXUNUSED(height),
int WXUNUSED(depth))
{
- return FALSE;
+ return false;
}
bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
const wxString& WXUNUSED(name),
- long WXUNUSED(type),
+ wxBitmapType WXUNUSED(type),
int WXUNUSED(desiredWidth),
int WXUNUSED(desiredHeight))
{
- return FALSE;
+ return false;
}
-bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
+bool wxBitmapHandler::SaveFile(const wxBitmap *WXUNUSED(bitmap),
const wxString& WXUNUSED(name),
- int WXUNUSED(type),
- const wxPalette *WXUNUSED(palette))
+ wxBitmapType WXUNUSED(type),
+ const wxPalette *WXUNUSED(palette)) const
{
- return FALSE;
+ return false;
}
// ----------------------------------------------------------------------------
-// DIB functions
+// global helper functions implemented here
// ----------------------------------------------------------------------------
-#ifndef __WXMICROWIN__
-bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
- HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
+// helper of wxBitmapToHICON/HCURSOR
+static
+HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
+ bool iconWanted,
+ int hotSpotX,
+ int hotSpotY)
{
- unsigned long i, headerSize;
- LPBITMAPINFO lpDIBheader = NULL;
- LPPALETTEENTRY lpPe = NULL;
+ if ( !bmp.Ok() )
+ {
+ // we can't create an icon/cursor form nothing
+ return 0;
+ }
+ if ( bmp.HasAlpha() )
+ {
+ // Create an empty mask bitmap.
+ // it doesn't seem to work if we mess with the mask at all.
+ HBITMAP hMonoBitmap = CreateBitmap(bmp.GetWidth(),bmp.GetHeight(),1,1,NULL);
+
+ ICONINFO iconInfo;
+ wxZeroMemory(iconInfo);
+ iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
+ if ( !iconWanted )
+ {
+ iconInfo.xHotspot = hotSpotX;
+ iconInfo.yHotspot = hotSpotY;
+ }
- // Allocate space for a DIB header
- headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
- lpDIBheader = (BITMAPINFO *) malloc(headerSize);
- lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
+ iconInfo.hbmMask = hMonoBitmap;
+ iconInfo.hbmColor = GetHbitmapOf(bmp);
- GetPaletteEntries(hPal, 0, 256, lpPe);
+ HICON hicon = ::CreateIconIndirect(&iconInfo);
- memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
+ ::DeleteObject(hMonoBitmap);
- // Fill in the static parts of the DIB header
- lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
- lpDIBheader->bmiHeader.biWidth = xSize;
- lpDIBheader->bmiHeader.biHeight = ySize;
- lpDIBheader->bmiHeader.biPlanes = 1;
+ return hicon;
+ }
- // this value must be 1, 4, 8 or 24 so PixelDepth can only be
- lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
- lpDIBheader->bmiHeader.biCompression = BI_RGB;
- lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
- lpDIBheader->bmiHeader.biClrUsed = 256;
+ wxMask* mask = bmp.GetMask();
+
+ if ( !mask )
+ {
+ // we must have a mask for an icon, so even if it's probably incorrect,
+ // do create it (grey is the "standard" transparent colour)
+ mask = new wxMask(bmp, *wxLIGHT_GREY);
+ }
+ ICONINFO iconInfo;
+ wxZeroMemory(iconInfo);
+ iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
+ if ( !iconWanted )
+ {
+ iconInfo.xHotspot = hotSpotX;
+ iconInfo.yHotspot = hotSpotY;
+ }
- // Initialize the DIB palette
- for (i = 0; i < 256; i++) {
- lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
- lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
- lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
- lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
- }
+ iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
+ iconInfo.hbmColor = GetHbitmapOf(bmp);
- *lpDIBHeader = lpDIBheader;
+ // black out the transparent area to preserve background colour, because
+ // Windows blits the original bitmap using SRCINVERT (XOR) after applying
+ // the mask to the dest rect.
+ {
+ MemoryHDC dcSrc, dcDst;
+ SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
+ selectBitmap(dcDst, iconInfo.hbmColor);
- return TRUE;
+ if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
+ dcSrc, 0, 0, SRCAND) )
+ {
+ wxLogLastError(_T("BitBlt"));
+ }
+ }
+
+ HICON hicon = ::CreateIconIndirect(&iconInfo);
+
+ if ( !bmp.GetMask() && !bmp.HasAlpha() )
+ {
+ // we created the mask, now delete it
+ delete mask;
+ }
+
+ // delete the inverted mask bitmap we created as well
+ ::DeleteObject(iconInfo.hbmMask);
+
+ return hicon;
}
-void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
+HICON wxBitmapToHICON(const wxBitmap& bmp)
{
- free(lpDIBHeader);
+ return wxBitmapToIconOrCursor(bmp, true, 0, 0);
}
-#endif
-// ----------------------------------------------------------------------------
-// other helper functions
-// ----------------------------------------------------------------------------
+HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
+{
+ return (HCURSOR)wxBitmapToIconOrCursor(bmp, false, hotSpotX, hotSpotY);
+}
-extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
+HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
{
#ifndef __WXMICROWIN__
wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
wxLogLastError(wxT("CreateBitmap"));
}
- ::SelectObject(hdcSrc, hbmpMask);
- ::SelectObject(hdcDst, hbmpInvMask);
+ HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask);
+ HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask);
if ( !::BitBlt(hdcDst, 0, 0, w, h,
hdcSrc, 0, 0,
NOTSRCCOPY) )
wxLogLastError(wxT("BitBlt"));
}
+ // Deselect objects
+ SelectObject(hdcSrc,srcTmp);
+ SelectObject(hdcDst,dstTmp);
+
::DeleteDC(hdcSrc);
::DeleteDC(hdcDst);
projects / wxWidgets.git / blobdiff