X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2ab2420acaa79dc04ae969eb744be626f61e86ab..c1009b93fd95191cc7e2f52b9a259f3a7d0035cb:/src/dfb/bitmap.cpp diff --git a/src/dfb/bitmap.cpp b/src/dfb/bitmap.cpp index 91684bdad3..4496298f13 100644 --- a/src/dfb/bitmap.cpp +++ b/src/dfb/bitmap.cpp @@ -28,9 +28,12 @@ #include "wx/dfb/private.h" //----------------------------------------------------------------------------- -// helpers +// helpers for translating between wx and DFB pixel formats //----------------------------------------------------------------------------- +namespace +{ + // NB: Most of this conversion code is needed because of differences between // wxImage and wxDFB's wxBitmap representations: // (1) wxImage uses RGB order, while DirectFB uses BGR @@ -40,11 +43,11 @@ // pitch = stride = # of bytes between the start of N-th line and (N+1)-th line // {Src,Dst}PixSize = # of bytes used to represent one pixel template -static void CopyPixelsAndSwapRGB(unsigned w, unsigned h, - const unsigned char *src, - unsigned src_pitch, - unsigned char *dst, - unsigned dst_pitch) +void CopyPixelsAndSwapRGB(unsigned w, unsigned h, + const unsigned char *src, + unsigned src_pitch, + unsigned char *dst, + unsigned dst_pitch) { unsigned src_advance = src_pitch - SrcPixSize * w; unsigned dst_advance = dst_pitch - DstPixSize * w; @@ -60,8 +63,7 @@ static void CopyPixelsAndSwapRGB(unsigned w, unsigned h, } } -static void CopySurfaceToImage(const wxIDirectFBSurfacePtr& surface, - wxImage& image) +void CopySurfaceToImage(const wxIDirectFBSurfacePtr& surface, wxImage& image) { wxIDirectFBSurface::Locked locked(surface, DSLF_READ); wxCHECK_RET( locked.ptr, "failed to lock surface" ); @@ -115,8 +117,8 @@ static void CopySurfaceToImage(const wxIDirectFBSurfacePtr& surface, } } -static void CopyImageToSurface(const wxImage& image, - const wxIDirectFBSurfacePtr& surface) +void CopyImageToSurface(const wxImage& image, + const wxIDirectFBSurfacePtr& surface) { wxIDirectFBSurface::Locked locked(surface, DSLF_WRITE); wxCHECK_RET( locked.ptr, "failed to lock surface" ); @@ -168,7 +170,7 @@ static void CopyImageToSurface(const wxImage& image, } } -static wxIDirectFBSurfacePtr +wxIDirectFBSurfacePtr CreateSurfaceWithFormat(int w, int h, DFBSurfacePixelFormat format) { DFBSurfaceDescription desc; @@ -189,7 +191,7 @@ CreateSurfaceWithFormat(int w, int h, DFBSurfacePixelFormat format) } // Creates a surface that will use wxImage's pixel data (RGB only) -static wxIDirectFBSurfacePtr CreateSurfaceForImage(const wxImage& image) +wxIDirectFBSurfacePtr CreateSurfaceForImage(const wxImage& image) { wxCHECK_MSG( image.Ok(), NULL, "invalid image" ); // FIXME_DFB: implement alpha handling by merging alpha buffer with RGB @@ -203,8 +205,8 @@ static wxIDirectFBSurfacePtr CreateSurfaceForImage(const wxImage& image) DSPF_RGB24); } -static bool ConvertSurfaceToFormat(wxIDirectFBSurfacePtr& surface, - DFBSurfacePixelFormat format) +bool ConvertSurfaceToFormat(wxIDirectFBSurfacePtr& surface, + DFBSurfacePixelFormat format) { if ( surface->GetPixelFormat() == format ) return true; @@ -224,7 +226,7 @@ static bool ConvertSurfaceToFormat(wxIDirectFBSurfacePtr& surface, return true; } -static DFBSurfacePixelFormat DepthToFormat(int depth) +DFBSurfacePixelFormat DepthToFormat(int depth) { switch ( depth ) { @@ -242,6 +244,106 @@ static DFBSurfacePixelFormat DepthToFormat(int depth) } } +// ---------------------------------------------------------------------------- +// monochrome bitmap functions +// ---------------------------------------------------------------------------- + +// this function works with destination buffer of type T and not char (where T +// is typically wxUint32 for RGB32, wxUint16 for RGB16 &c) as we don't need +// access to the individual pixel components -- and so it's not suitable for +// the pixel formats with pixel size not equal to 8, 16 or 32 +template +void +CopyBits(int width, + int height, + const unsigned char *src, + const wxIDirectFBSurface::Locked locked) +{ + static const int BITS_PER_BYTE = 8; + + // extra padding to add to dst at the end of each row: this works on the + // assumption that all rows are aligned at multiples of T (and usually 4 + // bytes) boundary so check for it (and change the code if this assert is + // ever triggered) + wxASSERT_MSG( !(locked.pitch % sizeof(T)), "image rows not aligned?" ); + const int padDst = (locked.pitch - width*sizeof(T))/sizeof(T); + + int x = 0; // position in the current bitmap row + + // a single char in src corresponds to 8 destination pixels and the last + // char in the row contains padding if necessary, i.e. there is always an + // integer number of chars per row + const unsigned char * const + srcEnd = src + ((width + BITS_PER_BYTE - 1)/BITS_PER_BYTE)*height; + + // we operate with sizeof(T), not 1, bytes at once + T *dst = static_cast(locked.ptr); + while ( src < srcEnd ) + { + unsigned char val = *src++; + + for ( int bit = 0; bit < BITS_PER_BYTE; bit++ ) + { + *dst++ = val & 1 ? White : Black; + val >>= 1; + if ( ++x == width ) + { + dst += padDst; + x = 0; + break; + } + } + } +} + +bool +CopyBitsToSurface(const unsigned char *bits, + int width, + int height, + wxIDirectFBSurfacePtr& surface) +{ + wxIDirectFBSurface::Locked locked(surface, DSLF_WRITE); + wxCHECK_MSG( locked.ptr, false, "failed to lock surface" ); + + const DFBSurfacePixelFormat format = surface->GetPixelFormat(); + + switch ( format ) + { + case DSPF_LUT8: + // we suppose that these indices correspond to the palette entries + // for white and black, respectively, but a better idea would be to + // use IDirectFBPalette::FindBestMatch() to determine them + CopyBits(width, height, bits, locked); + break; + + case DSPF_RGB16: + CopyBits(width, height, bits, locked); + break; + + case DSPF_RGB32: + CopyBits(width, height, bits, locked); + break; + + default: + // we don't really have time to implement efficient support for all + // the other formats so simply (and awfully slowly, of course...) + // convert everything else from RGB32 + surface = CreateSurfaceWithFormat(width, height, DSPF_RGB32); + if ( !surface ) + return false; + + if ( !CopyBitsToSurface(bits, width, height, surface) ) + return false; + + if ( !ConvertSurfaceToFormat(surface, format) ) + return false; + } + + return true; +} + +} // anonymous namespace + //----------------------------------------------------------------------------- // wxBitmapRefData //----------------------------------------------------------------------------- @@ -460,7 +562,13 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth) { wxCHECK_RET( depth == 1, wxT("can only create mono bitmap from XBM data") ); - wxFAIL_MSG( "not implemented" ); + // create bitmap in the device-dependent format + if ( !CreateWithFormat(width, height, DSPF_UNKNOWN) ) + return; + + if ( !CopyBitsToSurface((const unsigned char *)bits, + width, height, M_BITMAP->m_surface) ) + UnRef(); } int wxBitmap::GetHeight() const