-/////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
// Name: 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__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "bitmap.h"
#endif
#include "wx/icon.h"
#endif
-//#include "device.h"
-
#include "wx/msw/private.h"
#include "wx/log.h"
-#if !defined(__WXMICROWIN__)
+#if wxUSE_WXDIB
#include "wx/msw/dib.h"
#endif
#include "wx/image.h"
#include "wx/xpmdecod.h"
+#ifdef wxHAVE_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();
+ 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;
+
+ DECLARE_NO_COPY_CLASS(wxBitmapRefData)
+};
+
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
// implementation
// ============================================================================
+// ----------------------------------------------------------------------------
+// helper functions
+// ----------------------------------------------------------------------------
+
+// decide whether we should create a DIB or a DDB for the given parameters
+static bool wxShouldCreateDIB(int w, int h, int d, WXHDC hdc)
+{
+#if wxUSE_WXDIB
+ // 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));
+#else
+ return FALSE;
+#endif
+}
+
// ----------------------------------------------------------------------------
// 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;
}
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)
{
- // printf("About to delete bitmap %d\n", (int) (HBITMAP) m_hBitmap);
-#if 1
if ( !::DeleteObject((HBITMAP)m_hBitmap) )
{
wxLogLastError(wxT("DeleteObject(hbitmap)"));
}
-#endif
}
delete m_bitmapMask;
void wxBitmap::Init()
{
// m_refData = NULL; done in the base class ctor
+}
+wxGDIImageRefData *wxBitmap::CreateData() const
+{
+ return new wxBitmapRefData;
}
#ifdef __WIN32__
bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
{
-#ifndef __WXMICROWIN__
+#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
// it may be either HICON or HCURSOR
HICON hicon = (HICON)icon.GetHandle();
// the mask returned by GetIconInfo() is inversed compared to the usual
// wxWin convention
- refData->m_bitmapMask = new wxMask((WXHBITMAP)
- wxInvertMask(iconInfo.hbmMask, w, h));
+ 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
return FALSE;
refData->m_hBitmap = (WXHBITMAP)hbitmap;
-#if WXWIN_COMPATIBILITY_2
- refData->m_ok = TRUE;
-#endif // WXWIN_COMPATIBILITY_2
-
return TRUE;
#else // Win32
return CopyFromIconOrCursor(icon);
#endif // Win16/Win32
}
+#if wxUSE_WXDIB
+bool wxBitmap::CopyFromDIB(const wxDIB& dib)
+{
+ wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") );
+
+ HBITMAP hbitmap = dib.CreateDDB();
+ if ( !hbitmap )
+ return FALSE;
+
+ UnRef();
+
+ wxBitmapRefData *refData = new wxBitmapRefData;
+ m_refData = refData;
+
+ refData->m_width = dib.GetWidth();
+ refData->m_height = dib.GetHeight();
+ refData->m_depth = dib.GetDepth();
+
+ refData->m_hBitmap = (WXHBITMAP)hbitmap;
+
+#if wxUSE_PALETTE
+ wxPalette *palette = dib.CreatePalette();
+ if ( palette )
+ {
+ refData->m_bitmapPalette = *palette;
+ }
+
+ delete palette;
+#endif // wxUSE_PALETTE
+
+ return TRUE;
+}
+#endif
+
wxBitmap::~wxBitmap()
{
}
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 )
(void)Create(w, h, d);
}
+wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
+{
+ Init();
+
+ (void)Create(w, h, dc);
+}
+
wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
{
Init();
LoadFile(filename, (int)type);
}
-bool wxBitmap::Create(int w, int h, int d)
+bool wxBitmap::Create(int width, int height, int depth)
+{
+ return DoCreate(width, height, depth, 0);
+}
+
+bool wxBitmap::Create(int width, int height, const wxDC& dc)
+{
+ wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") );
+
+ return DoCreate(width, height, -1, dc.GetHDC());
+}
+
+bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
{
UnRef();
GetBitmapData()->m_width = w;
GetBitmapData()->m_height = h;
- GetBitmapData()->m_depth = d;
HBITMAP hbmp;
-#ifndef __WXMICROWIN__
- if ( d > 0 )
+
+#if wxUSE_WXDIB
+ 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
{
- ScreenHDC dc;
- hbmp = ::CreateCompatibleBitmap(dc, w, h);
- if ( !hbmp )
+ if ( d == -1 )
+ d = wxDisplayDepth();
+
+ GetBitmapData()->m_depth = d;
+
+#ifndef __WXMICROWIN__
+ if ( d > 0 )
{
- wxLogLastError(wxT("CreateCompatibleBitmap"));
+ hbmp = ::CreateBitmap(w, h, 1, d, NULL);
+ if ( !hbmp )
+ {
+ wxLogLastError(wxT("CreateBitmap"));
+ }
}
+ else
+#endif // !__WXMICROWIN__
+ {
+ ScreenHDC dc;
+ hbmp = ::CreateCompatibleBitmap(dc, w, h);
+ if ( !hbmp )
+ {
+ wxLogLastError(wxT("CreateCompatibleBitmap"));
+ }
- GetBitmapData()->m_depth = wxDisplayDepth();
+ GetBitmapData()->m_depth = wxDisplayDepth();
+ }
}
SetHBITMAP((WXHBITMAP)hbmp);
-#if WXWIN_COMPATIBILITY_2
- GetBitmapData()->m_ok = hbmp != 0;
-#endif // WXWIN_COMPATIBILITY_2
return Ok();
}
+#if wxUSE_IMAGE
+
// ----------------------------------------------------------------------------
-// wxImage to/from conversions
+// wxImage to/from conversions for Microwin
// ----------------------------------------------------------------------------
-#if wxUSE_IMAGE
-
-bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
-{
+// Microwin versions are so different from normal ones that it really doesn't
+// make sense to use #ifdefs inside the function bodies
#ifdef __WXMICROWIN__
- // Set this to 1 to experiment with mask code,
- // which currently doesn't work
-#define USE_MASKS 0
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
+{
+ // Set this to 1 to experiment with mask code,
+ // which currently doesn't work
+ #define USE_MASKS 0
m_refData = new wxBitmapRefData();
// Initial attempt at a simple-minded implementation.
// The bitmap will always be created at the screen depth,
// so the 'depth' argument is ignored.
-
+
HDC hScreenDC = ::GetDC(NULL);
- // printf("Screen planes = %d, bpp = %d\n", hScreenDC->psd->planes, hScreenDC->psd->bpp);
int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
if (hBitmap == NULL)
{
::ReleaseDC(NULL, hScreenDC);
- return FALSE;
+ return FALSE;
}
HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
if (!hMaskBitmap)
{
hasMask = FALSE;
- }
+ }
else
{
hScreenDC = ::GetDC(NULL);
::ReleaseDC(NULL, hScreenDC);
hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
- }
+ }
#else
hasMask = FALSE;
#endif
int i, j;
for (i = 0; i < image.GetWidth(); i++)
{
- for (j = 0; j < image.GetHeight(); j++)
- {
- unsigned char red = image.GetRed(i, j);
- unsigned char green = image.GetGreen(i, j);
- unsigned char blue = image.GetBlue(i, j);
+ for (j = 0; j < image.GetHeight(); j++)
+ {
+ 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));
+ ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
if (hasMask)
{
::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
else
::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
- }
- }
+ }
+ }
}
::SelectObject(hMemDC, hOldBitmap);
if (hasMask)
{
::SelectObject(hMaskDC, hOldMaskBitmap);
- ::DeleteDC(hMaskDC);
+ ::DeleteDC(hMaskDC);
- ((wxBitmapRefData*)m_refData)->m_bitmapMask = new wxMask((WXHBITMAP) hMaskBitmap);
+ ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap);
}
-
+
SetWidth(image.GetWidth());
SetHeight(image.GetHeight());
SetDepth(screenDepth);
SetHBITMAP( (WXHBITMAP) hBitmap );
-
+
#if wxUSE_PALETTE
// Copy the palette from the source image
SetPalette(image.GetPalette());
#endif // wxUSE_PALETTE
-#if WXWIN_COMPATIBILITY_2
- // check the wxBitmap object
- GetBitmapData()->SetOk();
-#endif // WXWIN_COMPATIBILITY_2
-
return TRUE;
+}
-#else
- wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
+wxImage wxBitmap::ConvertToImage() const
+{
+ // 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)
- m_refData = new wxBitmapRefData();
+ if (!Ok())
+ {
+ wxFAIL_MSG( wxT("bitmap is invalid") );
+ return wxNullImage;
+ }
+
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
+
+ // create an wxImage object
+ int width = GetWidth();
+ int height = GetHeight();
+ image.Create( width, height );
+ unsigned char *data = image.GetData();
+ if( !data )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for image") );
+ return wxNullImage;
+ }
+
+ 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++)
+ {
+ 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);
+ }
+ }
+
+ ::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.Ok(), FALSE,
+ _T("invalid HDC in wxBitmap::CreateFromImage()") );
+
+ return CreateFromImage(image, -1, dc.GetHDC());
+}
+
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc )
+{
+#if wxUSE_WXDIB
+ 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;
+
+
+ // store the bitmap parameters
+ wxBitmapRefData *refData = new wxBitmapRefData;
+ refData->m_width = w;
+ refData->m_height = h;
+ refData->m_hasAlpha = image.HasAlpha();
+
+ m_refData = refData;
+
+
+ // next either store DIB as is or create a DDB from it
+ HBITMAP hbitmap;
+
+ // are we going to use DIB?
+ //
+ // NB: DDBs don't support alpha so if we have alpha channel we must use DIB
+ if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) )
+ {
+ // don't delete the DIB section in dib object dtor
+ hbitmap = dib.Detach();
+
+ refData->m_isDIB = TRUE;
+ refData->m_depth = dib.GetDepth();
+ }
+ else // we need to convert DIB to DDB
+ {
+ hbitmap = dib.CreateDDB((HDC)hdc);
+
+ refData->m_depth = depth == -1 ? wxDisplayDepth() : depth;
+ }
+
+ // validate this object
+ SetHBITMAP((WXHBITMAP)hbitmap);
- // sizeLimit is the MS upper limit for the DIB size
-#ifdef WIN32
- int sizeLimit = 1024*768*3;
+ // finally also set the mask if we have one
+ if ( image.HasMask() )
+ {
+ SetMask(new wxMask(*this, wxColour(image.GetMaskRed(),
+ image.GetMaskGreen(),
+ image.GetMaskBlue())));
+ }
+
+ return TRUE;
#else
- int sizeLimit = 0x7fff ;
+ // FIXME: wxWinCE doesn't support wxDIB yet
+ return FALSE;
#endif
+}
+
+wxImage wxBitmap::ConvertToImage() const
+{
+ // FIXME: this is untested code for WinCE, and
+ // the mask is not yet handled.
+ // For tips, see:
+ // http://www.codeproject.com/bitmap/dibsection.asp?print=true
+
+#ifdef __WXWINCE__
+ // the colour used as transparent one in wxImage and the one it is replaced
+ // with when it really occurs in the bitmap
+ 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;
- // width and height of the device-dependent bitmap
- int width = image.GetWidth();
- int bmpHeight = image.GetHeight();
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
+
+ // create an wxImage object
+ int width = GetWidth();
+ int height = GetHeight();
+ image.Create( width, height );
+ unsigned char *data = image.GetData();
+ if( !data )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for image") );
+ return wxNullImage;
+ }
- // calc the number of bytes per scanline and padding
+ // 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 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 );
-
-#if wxUSE_PALETTE
- // Copy the palette from the source image
- SetPalette(image.GetPalette());
-#endif // wxUSE_PALETTE
// 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") );
+ if( !lpDIBh )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for DIB header") );
+ free( data );
+ return wxNullImage;
+ }
// 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.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.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 )
+
+ // memory for DIB data is allocated by CreateDIBSection
+ void *lpBits = NULL;
+
+ // copy data from the device-dependent bitmap to the DIB
+ HDC hdc = ::GetDC(NULL);
+ HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
+
+ HBITMAP hBitmapSection = ::CreateDIBSection( hdc, lpDIBh, DIB_RGB_COLORS, & lpBits, NULL, 0 );
+ if (!hBitmapSection)
{
- wxFAIL_MSG( wxT("could not allocate memory for DIB") );
- free( lpDIBh );
- return FALSE;
+ wxFAIL_MSG( wxT("could not create a DIB section") );
+ return wxNullImage;
}
- // 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);
+ // Copy the image from the DDB to the DIBSection
+ // Need to copy the supplied bitmap onto the newly created DIBsection
+ HDC hMemDC = CreateCompatibleDC(hdc);
+ HDC hCopyDC = CreateCompatibleDC(hdc);
+
+ if (! hMemDC || ! hCopyDC)
+ {
+ wxFAIL_MSG( wxT("unable to create compatible DCs") );
+ return wxNullImage;
+ }
-#if wxUSE_PALETTE
- HPALETTE hOldPalette = 0;
- if (image.GetPalette().Ok())
+#if 0
+ if (m_hPal)
+ {
+ SelectPalette(hMemDC, m_hPal, FALSE); RealizePalette(hMemDC);
+ SelectPalette(hCopyDC, m_hPal, FALSE); RealizePalette(hCopyDC);
+ }
+#endif
+
+ HBITMAP hOldMemBitmap = (HBITMAP) SelectObject(hMemDC, hBitmap);
+ HBITMAP hOldCopyBitmap = (HBITMAP) SelectObject(hCopyDC, hBitmapSection);
+
+ BitBlt(hCopyDC, 0, 0, GetWidth(), GetHeight(), hMemDC, 0, 0, SRCCOPY);
+
+ SelectObject(hMemDC, hOldMemBitmap);
+ SelectObject(hCopyDC, hOldCopyBitmap);
+ DeleteDC(hMemDC);
+ DeleteDC(hCopyDC);
+
+#if 0
+ if (m_hPal)
{
- hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
- ::RealizePalette(memdc);
+ HGDIOBJ hObj = ::GetStockObject(DEFAULT_PALETTE);
+ SelectObject(hMemDC, hObj);
+ SelectObject(hCopyDC, hObj);
}
-#endif // wxUSE_PALETTE
+#endif
- // 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;
+ ReleaseDC(NULL, hdc);
- for( n=0; n<numDIB; n++ )
+ // copy DIB data into the wxImage object
+ int i, j;
+ unsigned char *ptdata = data;
+ unsigned char *ptbits = (unsigned char*) lpBits;
+ for( i=0; i<height; i++ )
{
- 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( j=0; j<height; j++ )
+ for( j=0; j<width; j++ )
{
- for( i=0; i<width; i++ )
- {
- *(ptbits++) = *(ptdata+2);
- *(ptbits++) = *(ptdata+1);
- *(ptbits++) = *(ptdata );
- ptdata += 3;
- }
- for( i=0; i< padding; i++ ) *(ptbits++) = 0;
+ *(ptdata++) = *(ptbits+2);
+ *(ptdata++) = *(ptbits+1);
+ *(ptdata++) = *(ptbits );
+ ptbits += 3;
}
- ::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 );
-
-#if wxUSE_PALETTE
- if (hOldPalette)
- SelectPalette(memdc, hOldPalette, FALSE);
-#endif // wxUSE_PALETTE
+ ptbits += padding;
+ }
- // 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;
+ // TODO
+#if 0
+ // 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 );
ptdata = data;
- for( n=0; n<numDIB; n++ )
+ ptbits = lpBits;
+ for( i=0; i<height; i++ )
{
- 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( j=0; j<width; j++ )
{
- for(i=0; i<width; i++ )
+ // is this pixel transparent?
+ if ( *ptbits != 0 )
{
- // 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
+ if ( (ptdata[0] == MASK_RED) &&
+ (ptdata[1] == MASK_GREEN) &&
+ (ptdata[2] == MASK_BLUE) )
{
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- *(ptbits++) = zero;
+ // we have to fudge the colour a bit to prevent this
+ // pixel from appearing transparent
+ ptdata[2] = MASK_BLUE_REPLACEMENT;
}
+ ptdata += 3;
}
- for( i=0; i< padding; i++ ) *(ptbits++) = zero;
+ else // masked pixel
+ {
+ *(ptdata++) = MASK_RED;
+ *(ptdata++) = MASK_GREEN;
+ *(ptdata++) = MASK_BLUE;
+ }
+ ptbits += 3;
}
- ::StretchDIBits( memdc, 0, origin, width, height,\
- 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
- origin += height;
+ ptbits += padding;
}
- // 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 );
+ image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
+ image.SetMask( TRUE );
}
-
- // 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;
+ else
#endif
-}
-
-wxImage wxBitmap::ConvertToImage() const
-{
-#ifdef __WXMICROWIN__
- // 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") );
-
- // create an wxImage object
- int width = GetWidth();
- int height = GetHeight();
- image.Create( width, height );
- unsigned char *data = image.GetData();
- if( !data )
{
- wxFAIL_MSG( wxT("could not allocate data for image") );
- return wxNullImage;
+ image.SetMask( FALSE );
}
-
- 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++)
- {
- 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);
- }
- }
+ // free allocated resources
+ ::ReleaseDC(NULL, hdc);
+ free(lpDIBh);
- ::SelectObject(hMemDC, hOldBitmap);
- ::DeleteDC(hMemDC);
-
-#if wxUSE_PALETTE
- // Copy the palette from the source image
- if (GetPalette())
- image.SetPalette(* GetPalette());
-#endif // wxUSE_PALETTE
+ // Delete the DIB section
+ ::DeleteObject(hBitmapSection);
return image;
-
-#else // __MICROWIN__
+#else
+ // the colour used as transparent one in wxImage and the one it is replaced
+ // with when it really occurs in the bitmap
+ 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;
wxImage image;
::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++ )
{
- if( *ptbits != 0 )
+ // is this pixel transparent?
+ if ( *ptbits != 0 )
+ {
+ if ( (ptdata[0] == MASK_RED) &&
+ (ptdata[1] == MASK_GREEN) &&
+ (ptdata[2] == MASK_BLUE) )
+ {
+ // we have to fudge the colour a bit to prevent this
+ // pixel from appearing transparent
+ ptdata[2] = MASK_BLUE_REPLACEMENT;
+ }
ptdata += 3;
- else
+ }
+ else // masked pixel
{
- *(ptdata++) = r;
- *(ptdata++) = g;
- *(ptdata++) = b;
+ *(ptdata++) = MASK_RED;
+ *(ptdata++) = MASK_GREEN;
+ *(ptdata++) = MASK_BLUE;
}
ptbits += 3;
}
ptbits += padding;
}
- image.SetMaskColour( r, g, b );
+
+ image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
image.SetMask( TRUE );
}
else
#endif // wxUSE_IMAGE
+// ----------------------------------------------------------------------------
+// loading and saving bitmaps
+// ----------------------------------------------------------------------------
+
bool wxBitmap::LoadFile(const wxString& filename, long type)
{
UnRef();
wxImage image;
if ( image.LoadFile( filename, type ) && image.Ok() )
{
- *this = image.ConvertToBitmap();
+ *this = wxBitmap(image);
return TRUE;
}
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;
}
else
{
// FIXME what about palette? shouldn't we use it?
- wxImage image( *this );
+ wxImage image = ConvertToImage();
if ( image.Ok() )
{
return image.SaveFile(filename, type);
wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
{
-#ifndef __WXMICROWIN__
wxCHECK_MSG( Ok() &&
(rect.x >= 0) && (rect.y >= 0) &&
(rect.x+rect.width <= GetWidth()) &&
(rect.y+rect.height <= GetHeight()),
wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
- wxBitmap ret( rect.width, rect.height, GetDepth() );
+ wxBitmap ret( rect.width, rect.height );
wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
+#ifndef __WXMICROWIN__
+ // TODO: copy alpha channel data if any
+
// 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 selectSrc(dcSrc, GetHbitmap()),
+ selectDst(dcDst, GetHbitmapOf(ret));
+
+ if ( !selectSrc || !selectDst )
+ {
+ wxLogLastError(_T("SelectObjct(hBitmap)"));
+ }
+
+ if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
+ dcSrc, 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
{
- EnsureHasData();
+ return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
+ : (wxPalette *) NULL;
+}
+#endif
- GetBitmapData()->m_quality = q;
+wxMask *wxBitmap::GetMask() const
+{
+ return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
}
-#if WXWIN_COMPATIBILITY_2
-void wxBitmap::SetOk(bool isOk)
+#ifdef __WXDEBUG__
+
+wxDC *wxBitmap::GetSelectedInto() const
{
- EnsureHasData();
+ return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL;
+}
+
+#endif
+
+#if WXWIN_COMPATIBILITY_2_4
+
+int wxBitmap::GetQuality() const
+{
+ return 0;
+}
+
+#endif // WXWIN_COMPATIBILITY_2_4
+
+void wxBitmap::UseAlpha()
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_hasAlpha = true;
+}
+
+bool wxBitmap::HasAlpha() const
+{
+ return GetBitmapData() && GetBitmapData()->m_hasAlpha;
+}
+
+// ----------------------------------------------------------------------------
+// wxBitmap setters
+// ----------------------------------------------------------------------------
+
+#ifdef __WXDEBUG__
- GetBitmapData()->m_ok = isOk;
+void wxBitmap::SetSelectedInto(wxDC *dc)
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_selectedInto = dc;
}
-#endif // WXWIN_COMPATIBILITY_2
+
+#endif
#if wxUSE_PALETTE
{
EnsureHasData();
- 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
+#if WXWIN_COMPATIBILITY_2_4
+
+void wxBitmap::SetQuality(int WXUNUSED(quality))
{
-#ifdef __WXMICROWIN__
- return *this;
-#else
- wxMemoryDC memDC;
- wxBitmap tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
- HPALETTE hPal = (HPALETTE) NULL;
- LPBITMAPINFO lpDib;
- void *lpBits = (void*) NULL;
+}
-#if wxUSE_PALETTE
- if( GetPalette() && GetPalette()->Ok() )
+#endif // WXWIN_COMPATIBILITY_2_4
+
+// ----------------------------------------------------------------------------
+// raw bitmap access support
+// ----------------------------------------------------------------------------
+
+#ifdef wxHAVE_RAW_BITMAP
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
+{
+#if wxUSE_WXDIB
+ if ( !Ok() )
{
- tmpBitmap.SetPalette(*GetPalette());
- memDC.SelectObject(tmpBitmap);
- memDC.SetPalette(*GetPalette());
- hPal = (HPALETTE)GetPalette()->GetHPALETTE();
+ // no bitmap, no data (raw or otherwise)
+ return NULL;
}
- else
+
+ // 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 )
+ {
+ wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE,
+ _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 // 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()") );
+
+ return NULL;
+ }
- ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
+ // 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!
+ const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
+ 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;
+
+ // the cast is ugly but we can't do without it and without making this
+ // function template (and hence inline) unfortunately
+ typedef wxPixelData<wxBitmap, wxAlphaPixelFormat> PixelData;
+ PixelData& data = (PixelData &)dataBase;
+
+ if ( !data )
+ {
+ // 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 ( GetBitmapData()->m_hasAlpha )
+ {
+ // AlphaBlend() wants to have premultiplied source alpha but
+ // wxRawBitmap API uses normal, not premultiplied, colours, so adjust
+ // them here now
+ PixelData::Iterator p(data);
+
+ const int w = data.GetWidth();
+ const int h = data.GetHeight();
+
+ for ( int y = 0; y < h; y++ )
+ {
+ PixelData::Iterator rowStart = p;
+
+ for ( int x = 0; x < w; x++ )
+ {
+ const unsigned alpha = p.Alpha();
+
+ p.Red() = (p.Red() * alpha + 127) / 255;
+ p.Blue() = (p.Blue() * alpha + 127) / 255;
+ p.Green() = (p.Green() * alpha + 127) / 255;
+
+ ++p;
+ }
+
+ p = rowStart;
+ p.OffsetY(data, 1);
+ }
+ }
+
+ // 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 // #ifdef wxHAVE_RAW_BITMAP
+
// ----------------------------------------------------------------------------
// wxMask
// ----------------------------------------------------------------------------
// 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);
HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
{
unsigned long i, headerSize;
- LPBITMAPINFO lpDIBheader = NULL;
- LPPALETTEENTRY lpPe = NULL;
-
// Allocate space for a DIB header
headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
- lpDIBheader = (BITMAPINFO *) malloc(headerSize);
- lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
+ LPBITMAPINFO lpDIBheader = (BITMAPINFO *) malloc(headerSize);
+ LPPALETTEENTRY lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
GetPaletteEntries(hPal, 0, 256, lpPe);
#endif
// ----------------------------------------------------------------------------
-// other helper functions
+// global helper functions implemented here
// ----------------------------------------------------------------------------
-extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
+// helper of wxBitmapToHICON/HCURSOR
+static
+HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
+ bool iconWanted,
+ int hotSpotX,
+ int hotSpotY)
+{
+ if ( !bmp.Ok() )
+ {
+ // we can't create an icon/cursor form nothing
+ return 0;
+ }
+
+ 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;
+ }
+
+ iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
+ iconInfo.hbmColor = GetHbitmapOf(bmp);
+
+ // 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);
+
+ if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
+ dcSrc, 0, 0, SRCAND) )
+ {
+ wxLogLastError(_T("BitBlt"));
+ }
+ }
+
+ HICON hicon = ::CreateIconIndirect(&iconInfo);
+
+ if ( !bmp.GetMask() )
+ {
+ // we created the mask, now delete it
+ delete mask;
+ }
+
+ // delete the inverted mask bitmap we created as well
+ ::DeleteObject(iconInfo.hbmMask);
+
+ return hicon;
+}
+
+HICON wxBitmapToHICON(const wxBitmap& bmp)
+{
+ return wxBitmapToIconOrCursor(bmp, TRUE, 0, 0);
+}
+
+HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
+{
+ return (HCURSOR)wxBitmapToIconOrCursor(bmp, FALSE, hotSpotX, hotSpotY);
+}
+
+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