X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e2badebb8fad5ee453fada24f336c275df9f216b..c1009b93fd95191cc7e2f52b9a259f3a7d0035cb:/src/dfb/bitmap.cpp?ds=sidebyside diff --git a/src/dfb/bitmap.cpp b/src/dfb/bitmap.cpp index 6c759fafb4..4496298f13 100644 --- a/src/dfb/bitmap.cpp +++ b/src/dfb/bitmap.cpp @@ -23,13 +23,17 @@ #include "wx/bitmap.h" #include "wx/colour.h" #include "wx/image.h" +#include "wx/rawbmp.h" #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 @@ -39,11 +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; @@ -59,11 +63,10 @@ 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, _T("failed to lock surface") ); + wxCHECK_RET( locked.ptr, "failed to lock surface" ); const unsigned width = image.GetWidth(); const unsigned height = image.GetHeight(); @@ -114,8 +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" ); @@ -167,33 +170,185 @@ static void CopyImageToSurface(const wxImage& image, } } +wxIDirectFBSurfacePtr +CreateSurfaceWithFormat(int w, int h, DFBSurfacePixelFormat format) +{ + DFBSurfaceDescription desc; + desc.flags = (DFBSurfaceDescriptionFlags) + (DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT); + desc.caps = DSCAPS_NONE; + desc.width = w; + desc.height = h; + + if ( format != DSPF_UNKNOWN ) + { + desc.flags = (DFBSurfaceDescriptionFlags)( + desc.flags | DSDESC_PIXELFORMAT); + desc.pixelformat = format; + } + + return wxIDirectFB::Get()->CreateSurface(&desc); +} + // 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, _T("invalid image") ); + wxCHECK_MSG( image.Ok(), NULL, "invalid image" ); // FIXME_DFB: implement alpha handling by merging alpha buffer with RGB // into a temporary RGBA surface - wxCHECK_MSG( !image.HasAlpha(), NULL, _T("alpha channel not supported") ); + wxCHECK_MSG( !image.HasAlpha(), NULL, "alpha channel not supported" ); // NB: wxImage uses RGB order of bytes while DirectFB uses BGR, so we // cannot use preallocated surface that shares data with wxImage, we // have to copy the data to temporary surface instead - DFBSurfaceDescription desc; - desc.flags = (DFBSurfaceDescriptionFlags) - (DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT); - desc.caps = DSCAPS_NONE; - desc.width = image.GetWidth(); - desc.height = image.GetHeight(); - desc.pixelformat = DSPF_RGB24; + return CreateSurfaceWithFormat(image.GetWidth(), image.GetHeight(), + DSPF_RGB24); +} - return wxIDirectFB::Get()->CreateSurface(&desc); +bool ConvertSurfaceToFormat(wxIDirectFBSurfacePtr& surface, + DFBSurfacePixelFormat format) +{ + if ( surface->GetPixelFormat() == format ) + return true; + + int w, h; + surface->GetSize(&w, &h); + wxIDirectFBSurfacePtr s = CreateSurfaceWithFormat(w, h, format); + if ( !s ) + return false; + + if ( !s->SetBlittingFlags(DSBLIT_NOFX) ) + return false; + if ( !s->Blit(surface->GetRaw(), NULL, 0, 0) ) + return false; + + surface = s; + return true; +} + +DFBSurfacePixelFormat DepthToFormat(int depth) +{ + switch ( depth ) + { + case 24: + return DSPF_RGB24; + case 32: + // NB: we treat depth=32 as requesting ARGB for consistency with + // other ports + return DSPF_ARGB; + default: + wxFAIL_MSG( "unsupported depth requested" ); + // fall through + case -1: + return DSPF_UNKNOWN; + } +} + +// ---------------------------------------------------------------------------- +// 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 //----------------------------------------------------------------------------- -class wxBitmapRefData: public wxObjectRefData +class wxBitmapRefData: public wxGDIRefData { public: wxBitmapRefData() @@ -222,6 +377,8 @@ public: #endif } + virtual bool IsOk() const { return m_surface; } + wxIDirectFBSurfacePtr m_surface; wxMask *m_mask; #if wxUSE_PALETTE @@ -235,7 +392,6 @@ public: // wxBitmap //----------------------------------------------------------------------------- -IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase) IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxBitmapBase) wxBitmap::wxBitmap(int width, int height, int depth) @@ -247,7 +403,7 @@ bool wxBitmap::Create(const wxIDirectFBSurfacePtr& surface) { UnRef(); - wxCHECK_MSG( surface, false, _T("invalid surface") ); + wxCHECK_MSG( surface, false, "invalid surface" ); m_refData = new wxBitmapRefData(); M_BITMAP->m_surface = surface; @@ -256,9 +412,7 @@ bool wxBitmap::Create(const wxIDirectFBSurfacePtr& surface) bool wxBitmap::Create(int width, int height, int depth) { - wxCHECK_MSG( depth == -1, false, wxT("only default depth supported now") ); - - return CreateWithFormat(width, height, -1); + return CreateWithFormat(width, height, DepthToFormat(depth)); } bool wxBitmap::CreateWithFormat(int width, int height, int dfbFormat) @@ -267,33 +421,29 @@ bool wxBitmap::CreateWithFormat(int width, int height, int dfbFormat) wxCHECK_MSG( width > 0 && height > 0, false, wxT("invalid bitmap size") ); - DFBSurfaceDescription desc; - desc.flags = (DFBSurfaceDescriptionFlags)( - DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT); - desc.caps = DSCAPS_NONE; - desc.width = width; - desc.height = height; - - if ( dfbFormat != -1 ) - { - desc.flags = (DFBSurfaceDescriptionFlags)( - desc.flags | DSDESC_PIXELFORMAT); - desc.pixelformat = (DFBSurfacePixelFormat)dfbFormat; - } - - return Create(wxIDirectFB::Get()->CreateSurface(&desc)); + return Create(CreateSurfaceWithFormat(width, height, + DFBSurfacePixelFormat(dfbFormat))); } #if wxUSE_IMAGE -wxBitmap::wxBitmap(const wxImage& image, int depth) +wxBitmap::wxBitmap(const wxImage& imageOrig, int depth) { - wxCHECK_RET( image.Ok(), wxT("invalid image") ); - wxCHECK_RET( depth == -1, wxT("only default depth supported now") ); + wxCHECK_RET( imageOrig.Ok(), wxT("invalid image") ); + + wxImage image(imageOrig); + + // convert mask to alpha channel, because wxMask isn't implemented yet + // FIXME: don't do this, implement proper wxMask support + if ( image.HasMask() ) + image.InitAlpha(); + + DFBSurfacePixelFormat format = DepthToFormat(depth); + if ( format == DSPF_UNKNOWN && image.HasAlpha() ) + format = DSPF_ARGB; // create surface in screen's format (unless we need alpha channel, // in which case use ARGB): - if ( !CreateWithFormat(image.GetWidth(), image.GetHeight(), - image.HasAlpha() ? DSPF_ARGB : -1) ) + if ( !CreateWithFormat(image.GetWidth(), image.GetHeight(), format) ) return; // then copy the image to it: @@ -320,9 +470,6 @@ wxBitmap::wxBitmap(const wxImage& image, int depth) return; } } - - // FIXME: implement mask creation from image's mask (or alpha channel?) - wxASSERT_MSG( !image.HasMask(), _T("image masks are ignored for now") ); } wxImage wxBitmap::ConvertToImage() const @@ -355,12 +502,57 @@ wxImage wxBitmap::ConvertToImage() const } // FIXME: implement mask setting in the image - wxASSERT_MSG( GetMask() == NULL, _T("bitmap masks are ignored for now") ); + wxASSERT_MSG( GetMask() == NULL, "bitmap masks are ignored for now" ); return img; } #endif // wxUSE_IMAGE +void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp) +{ + wxCHECK_MSG( Ok(), NULL, "invalid bitmap" ); + + AllocExclusive(); + + DFBSurfacePixelFormat format; + if ( bpp == 32 ) + format = DSPF_ARGB; + else + format = DSPF_RGB24; + + // convert the bitmap into format compatible with requested raw access; + // note that we don't bother converting the bitmap back in UngetRawData(), + // as unpacked formats (RGB24, RGB32) are the common case and converting + // between them while blitting is fast enough (FIXME?) + if ( !ConvertSurfaceToFormat(M_BITMAP->m_surface, format) ) + return NULL; + + void *bits = NULL; + if ( !M_BITMAP->m_surface->Lock + ( + (DFBSurfaceLockFlags)(DSLF_READ | DSLF_WRITE), + &bits, + &data.m_stride + ) ) + return NULL; + + M_BITMAP->m_surface->GetSize(&data.m_width, &data.m_height); + + return bits; +} + +void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data)) +{ + M_BITMAP->m_surface->Unlock(); +} + +bool wxBitmap::HasAlpha() const +{ + wxCHECK_MSG( Ok(), false, "invalid bitmap" ); + + return M_BITMAP->m_surface->GetPixelFormat() == DSPF_ARGB; +} + wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type) { LoadFile(filename, type); @@ -370,12 +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( _T("not implemented") ); -} + // create bitmap in the device-dependent format + if ( !CreateWithFormat(width, height, DSPF_UNKNOWN) ) + return; -bool wxBitmap::IsOk() const -{ - return (m_refData != NULL && M_BITMAP->m_surface); + if ( !CopyBitsToSurface((const unsigned char *)bits, + width, height, M_BITMAP->m_surface) ) + UnRef(); } int wxBitmap::GetHeight() const @@ -521,21 +714,35 @@ void wxBitmap::SetHeight(int height) { AllocExclusive(); - wxFAIL_MSG( _T("SetHeight not implemented") ); + wxFAIL_MSG( "SetHeight not implemented" ); } void wxBitmap::SetWidth(int width) { AllocExclusive(); - wxFAIL_MSG( _T("SetWidth not implemented") ); + wxFAIL_MSG( "SetWidth not implemented" ); } void wxBitmap::SetDepth(int depth) { + DFBSurfacePixelFormat format = DepthToFormat(depth); + if ( M_BITMAP->m_surface->GetPixelFormat() == format ) + return; + AllocExclusive(); - wxFAIL_MSG( _T("SetDepth not implemented") ); + int w, h; + M_BITMAP->m_surface->GetSize(&w, &h); + wxIDirectFBSurfacePtr s = CreateSurfaceWithFormat(w, h, format); + if ( !s ) + return; + if ( !s->SetBlittingFlags(DSBLIT_NOFX) ) + return; + if ( !s->Blit(M_BITMAP->m_surface->GetRaw(), NULL, 0, 0) ) + return; + + M_BITMAP->m_surface = s; } wxIDirectFBSurfacePtr wxBitmap::GetDirectFBSurface() const @@ -545,12 +752,12 @@ wxIDirectFBSurfacePtr wxBitmap::GetDirectFBSurface() const return M_BITMAP->m_surface; } -wxObjectRefData *wxBitmap::CreateRefData() const +wxGDIRefData *wxBitmap::CreateGDIRefData() const { return new wxBitmapRefData; } -wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *data) const +wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const { return new wxBitmapRefData(*(wxBitmapRefData *)data); }