#include "wx/bitmap.h"
#include "wx/colour.h"
#include "wx/image.h"
+#include "wx/rawbmp.h"
#include "wx/dfb/private.h"
// helpers
//-----------------------------------------------------------------------------
-// Creates a surface that will use wxImage's pixel data (RGB only)
-static wxIDirectFBSurfacePtr CreateSurfaceForImage(const wxImage& image)
+// 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
+// (2) wxImage has alpha channel in a separate plane, while DirectFB puts
+// all components into single BGRA plane
+
+// 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<int SrcPixSize, int DstPixSize>
+static void CopyPixelsAndSwapRGB(unsigned w, unsigned h,
+ const unsigned char *src,
+ unsigned src_pitch,
+ unsigned char *dst,
+ unsigned dst_pitch)
{
- wxCHECK_MSG( image.Ok(), NULL, _T("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") );
+ unsigned src_advance = src_pitch - SrcPixSize * w;
+ unsigned dst_advance = dst_pitch - DstPixSize * w;
+ for ( unsigned y = 0; y < h; y++, src += src_advance, dst += dst_advance )
+ {
+ for ( unsigned x = 0; x < w; x++, src += SrcPixSize, dst += DstPixSize )
+ {
+ // copy with RGB -> BGR translation:
+ dst[0] = src[2];
+ dst[1] = src[1];
+ dst[2] = src[0];
+ }
+ }
+}
+
+static void CopySurfaceToImage(const wxIDirectFBSurfacePtr& surface,
+ wxImage& image)
+{
+ wxIDirectFBSurface::Locked locked(surface, DSLF_READ);
+ wxCHECK_RET( locked.ptr, "failed to lock surface" );
+
+ const unsigned width = image.GetWidth();
+ const unsigned height = image.GetHeight();
+ const DFBSurfacePixelFormat format = surface->GetPixelFormat();
+ // copy RGB data from the surface:
+ switch ( format )
+ {
+ case DSPF_RGB24:
+ CopyPixelsAndSwapRGB<3,3>
+ (
+ width, height,
+ (unsigned char*)locked.ptr, locked.pitch,
+ image.GetData(), width * 3
+ );
+ break;
+
+ case DSPF_RGB32:
+ case DSPF_ARGB:
+ CopyPixelsAndSwapRGB<4,3>
+ (
+ width, height,
+ (unsigned char*)locked.ptr, locked.pitch,
+ image.GetData(), width * 3
+ );
+ break;
+
+ default:
+ wxFAIL_MSG( "unexpected pixel format" );
+ return;
+ }
+
+ // extract alpha channel if the bitmap has it:
+ if ( format == DSPF_ARGB )
+ {
+ // create alpha plane:
+ image.SetAlpha();
+
+ // and copy alpha data to it:
+ const unsigned advance = locked.pitch - 4 * width;
+ unsigned char *alpha = image.GetAlpha();
+ // NB: "+3" is to get pointer to alpha component
+ const unsigned char *src = ((unsigned char*)locked.ptr) + 3;
+
+ for ( unsigned y = 0; y < height; y++, src += advance )
+ for ( unsigned x = 0; x < width; x++, src += 4 )
+ *(alpha++) = *src;
+ }
+}
+
+static void CopyImageToSurface(const wxImage& image,
+ const wxIDirectFBSurfacePtr& surface)
+{
+ wxIDirectFBSurface::Locked locked(surface, DSLF_WRITE);
+ wxCHECK_RET( locked.ptr, "failed to lock surface" );
+
+ const unsigned width = image.GetWidth();
+ const unsigned height = image.GetHeight();
+ const DFBSurfacePixelFormat format = surface->GetPixelFormat();
+
+ // copy RGB data to the surface:
+ switch ( format )
+ {
+ case DSPF_RGB24:
+ CopyPixelsAndSwapRGB<3,3>
+ (
+ width, height,
+ image.GetData(), width * 3,
+ (unsigned char*)locked.ptr, locked.pitch
+ );
+ break;
+
+ case DSPF_RGB32:
+ case DSPF_ARGB:
+ CopyPixelsAndSwapRGB<3,4>
+ (
+ width, height,
+ image.GetData(), width * 3,
+ (unsigned char*)locked.ptr, locked.pitch
+ );
+ break;
+
+ default:
+ wxFAIL_MSG( "unexpected pixel format" );
+ return;
+ }
+
+ // if the image has alpha channel, merge it in:
+ if ( format == DSPF_ARGB )
+ {
+ wxCHECK_RET( image.HasAlpha(), "logic error - ARGB, but no alpha" );
+
+ const unsigned advance = locked.pitch - 4 * width;
+ const unsigned char *alpha = image.GetAlpha();
+ // NB: "+3" is to get pointer to alpha component
+ unsigned char *dest = ((unsigned char*)locked.ptr) + 3;
+
+ for ( unsigned y = 0; y < height; y++, dest += advance )
+ for ( unsigned x = 0; x < width; x++, dest += 4 )
+ *dest = *(alpha++);
+ }
+}
+
+static wxIDirectFBSurfacePtr
+CreateSurfaceWithFormat(int w, int h, DFBSurfacePixelFormat format)
+{
DFBSurfaceDescription desc;
desc.flags = (DFBSurfaceDescriptionFlags)
- (DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT |
- DSDESC_PREALLOCATED);
+ (DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT);
desc.caps = DSCAPS_NONE;
- desc.width = image.GetWidth();
- desc.height = image.GetHeight();
- desc.pixelformat = DSPF_RGB24;
- desc.preallocated[0].data = image.GetData();
- desc.preallocated[0].pitch = 3 * desc.width;
+ 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)
+{
+ 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, "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
+ return CreateSurfaceWithFormat(image.GetWidth(), image.GetHeight(),
+ DSPF_RGB24);
+}
+
+static 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;
+}
+
+static 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;
+ }
+}
+
//-----------------------------------------------------------------------------
// wxBitmapRefData
//-----------------------------------------------------------------------------
{
UnRef();
- wxCHECK_MSG( surface, false, _T("invalid surface") );
+ wxCHECK_MSG( surface, false, "invalid surface" );
m_refData = new wxBitmapRefData();
M_BITMAP->m_surface = surface;
}
bool wxBitmap::Create(int width, int height, int depth)
+{
+ return CreateWithFormat(width, height, DepthToFormat(depth));
+}
+
+bool wxBitmap::CreateWithFormat(int width, int height, int dfbFormat)
{
UnRef();
wxCHECK_MSG( width > 0 && height > 0, false, wxT("invalid bitmap size") );
- wxCHECK_MSG( depth == -1, false, wxT("only default depth supported now") );
-
- DFBSurfaceDescription desc;
- desc.flags = (DFBSurfaceDescriptionFlags)(
- DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT);
- desc.caps = DSCAPS_NONE;
- desc.width = width;
- desc.height = height;
- return Create(wxIDirectFB::Get()->CreateSurface(&desc));
+ return Create(CreateSurfaceWithFormat(width, height,
+ DFBSurfacePixelFormat(dfbFormat)));
}
#if wxUSE_IMAGE
{
wxCHECK_RET( image.Ok(), wxT("invalid image") );
- // create surface in screen's format:
- if ( !Create(image.GetWidth(), image.GetHeight(), depth) )
+ 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(), format) )
return;
// then copy the image to it:
- wxIDirectFBSurfacePtr src(CreateSurfaceForImage(image));
wxIDirectFBSurfacePtr dst = M_BITMAP->m_surface;
- if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
- return;
- if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
- return;
+ switch ( dst->GetPixelFormat() )
+ {
+ case DSPF_RGB24:
+ case DSPF_RGB32:
+ case DSPF_ARGB:
+ CopyImageToSurface(image, dst);
+ break;
+
+ default:
+ {
+ // wxBitmap uses different pixel format, so we have to use a
+ // temporary surface and blit to the bitmap via it:
+ wxIDirectFBSurfacePtr src(CreateSurfaceForImage(image));
+ CopyImageToSurface(image, src);
+
+ if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
+ return;
+ if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
+ return;
+ }
+ }
// FIXME: implement mask creation from image's mask (or alpha channel?)
- wxASSERT_MSG( !image.HasMask(), _T("image masks are ignored for now") );
+ wxASSERT_MSG( !image.HasMask(), "image masks are ignored for now" );
}
wxImage wxBitmap::ConvertToImage() const
wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
wxImage img(GetWidth(), GetHeight());
- wxIDirectFBSurfacePtr dst(CreateSurfaceForImage(img));
wxIDirectFBSurfacePtr src = M_BITMAP->m_surface;
- if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
- return wxNullImage;
- if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
- return wxNullImage;
+ switch ( src->GetPixelFormat() )
+ {
+ case DSPF_RGB24:
+ case DSPF_RGB32:
+ case DSPF_ARGB:
+ CopySurfaceToImage(src, img);
+ break;
+ default:
+ {
+ // wxBitmap uses different pixel format, so we have to use a
+ // temporary surface and blit to the bitmap via it:
+ wxIDirectFBSurfacePtr dst(CreateSurfaceForImage(img));
+
+ if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
+ return wxNullImage;
+ if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
+ return wxNullImage;
+
+ CopySurfaceToImage(dst, img);
+ }
+ }
// 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);
{
wxCHECK_RET( depth == 1, wxT("can only create mono bitmap from XBM data") );
- wxFAIL_MSG( _T("not implemented") );
+ wxFAIL_MSG( "not implemented" );
}
bool wxBitmap::IsOk() const
{
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
projects / wxWidgets.git / blobdiff