src/dfb/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/dfb/bitmap.cpp
   3 // Purpose:     wxBitmap implementation
   4 // Author:      Vaclav Slavik
   5 // Created:     2006-08-04
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 REA Elektronik GmbH
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/app.h"
  20     #include "wx/log.h"
  21 #endif
  22
  23 #include "wx/bitmap.h"
  24 #include "wx/colour.h"
  25 #include "wx/image.h"
  26
  27 #include "wx/dfb/private.h"
  28
  29 //-----------------------------------------------------------------------------
  30 // helpers
  31 //-----------------------------------------------------------------------------
  32
  33 // Creates a surface that will use wxImage's pixel data (RGB only)
  34 static wxIDirectFBSurfacePtr CreateSurfaceForImage(const wxImage& image)
  35 {
  36     wxCHECK_MSG( image.Ok(), NULL, _T("invalid image") );
  37     // FIXME_DFB: implement alpha handling by merging alpha buffer with RGB
  38     //            into a temporary RGBA surface
  39     wxCHECK_MSG( !image.HasAlpha(), NULL, _T("alpha channel not supported") );
  40
  41     DFBSurfaceDescription desc;
  42     desc.flags = (DFBSurfaceDescriptionFlags)
  43         (DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT |
  44          DSDESC_PREALLOCATED);
  45     desc.caps = DSCAPS_NONE;
  46     desc.width = image.GetWidth();
  47     desc.height = image.GetHeight();
  48     desc.pixelformat = DSPF_RGB24;
  49     desc.preallocated[0].data = image.GetData();
  50     desc.preallocated[0].pitch = 3 * desc.width;
  51
  52     return wxIDirectFB::Get()->CreateSurface(&desc);
  53 }
  54
  55 //-----------------------------------------------------------------------------
  56 // wxBitmapRefData
  57 //-----------------------------------------------------------------------------
  58
  59 class wxBitmapRefData: public wxObjectRefData
  60 {
  61 public:
  62     wxBitmapRefData()
  63     {
  64         m_mask = NULL;
  65 #if wxUSE_PALETTE
  66         m_palette = NULL;
  67 #endif
  68     }
  69
  70     wxBitmapRefData(const wxBitmapRefData& data)
  71     {
  72         m_surface = data.m_surface ? data.m_surface->Clone() : NULL;
  73
  74         m_mask = data.m_mask ? new wxMask(*data.m_mask) : NULL;
  75 #if wxUSE_PALETTE
  76         m_palette = data.m_palette ? new wxPalette(*data.m_palette) : NULL;
  77 #endif
  78     }
  79
  80     virtual ~wxBitmapRefData()
  81     {
  82         delete m_mask;
  83 #if wxUSE_PALETTE
  84         delete m_palette;
  85 #endif
  86     }
  87
  88     wxIDirectFBSurfacePtr m_surface;
  89     wxMask               *m_mask;
  90 #if wxUSE_PALETTE
  91     wxPalette            *m_palette;
  92 #endif
  93 };
  94
  95 #define M_BITMAP ((wxBitmapRefData *)m_refData)
  96
  97 //-----------------------------------------------------------------------------
  98 // wxBitmap
  99 //-----------------------------------------------------------------------------
 100
 101 IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
 102 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxBitmapBase)
 103
 104 wxBitmap::wxBitmap(int width, int height, int depth)
 105 {
 106     Create(width, height, depth);
 107 }
 108
 109 bool wxBitmap::Create(const wxIDirectFBSurfacePtr& surface)
 110 {
 111     UnRef();
 112
 113     wxCHECK_MSG( surface, false, _T("invalid surface") );
 114
 115     m_refData = new wxBitmapRefData();
 116     M_BITMAP->m_surface = surface;
 117     return true;
 118 }
 119
 120 bool wxBitmap::Create(int width, int height, int depth)
 121 {
 122     UnRef();
 123
 124     wxCHECK_MSG( width > 0 && height > 0, false, wxT("invalid bitmap size") );
 125     wxCHECK_MSG( depth == -1, false, wxT("only default depth supported now") );
 126
 127     DFBSurfaceDescription desc;
 128     desc.flags = (DFBSurfaceDescriptionFlags)(
 129                         DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT);
 130     desc.caps = DSCAPS_NONE;
 131     desc.width = width;
 132     desc.height = height;
 133
 134     return Create(wxIDirectFB::Get()->CreateSurface(&desc));
 135 }
 136
 137 #if wxUSE_IMAGE
 138 wxBitmap::wxBitmap(const wxImage& image, int depth)
 139 {
 140     wxCHECK_RET( image.Ok(), wxT("invalid image") );
 141
 142     // create surface in screen's format:
 143     if ( !Create(image.GetWidth(), image.GetHeight(), depth) )
 144         return;
 145
 146     // then copy the image to it:
 147     wxIDirectFBSurfacePtr src(CreateSurfaceForImage(image));
 148     wxIDirectFBSurfacePtr dst = M_BITMAP->m_surface;
 149
 150     if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
 151         return;
 152     if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
 153         return;
 154
 155     // FIXME: implement mask creation from image's mask (or alpha channel?)
 156     wxASSERT_MSG( !image.HasMask(), _T("image masks are ignored for now") );
 157 }
 158
 159 wxImage wxBitmap::ConvertToImage() const
 160 {
 161     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 162
 163     wxImage img(GetWidth(), GetHeight());
 164     wxIDirectFBSurfacePtr dst(CreateSurfaceForImage(img));
 165     wxIDirectFBSurfacePtr src = M_BITMAP->m_surface;
 166
 167     if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
 168         return wxNullImage;
 169     if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
 170         return wxNullImage;
 171
 172     // FIXME: implement mask setting in the image
 173     wxASSERT_MSG( GetMask() == NULL, _T("bitmap masks are ignored for now") );
 174
 175     return img;
 176 }
 177 #endif // wxUSE_IMAGE
 178
 179 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 180 {
 181     LoadFile(filename, type);
 182 }
 183
 184 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 185 {
 186     wxCHECK_RET( depth == 1, wxT("can only create mono bitmap from XBM data") );
 187
 188     wxFAIL_MSG( _T("not implemented") );
 189 }
 190
 191 bool wxBitmap::IsOk() const
 192 {
 193     return (m_refData != NULL && M_BITMAP->m_surface);
 194 }
 195
 196 int wxBitmap::GetHeight() const
 197 {
 198     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 199
 200     int h = -1;
 201     M_BITMAP->m_surface->GetSize(NULL, &h);
 202     return h;
 203 }
 204
 205 int wxBitmap::GetWidth() const
 206 {
 207     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 208
 209     int w = -1;
 210     M_BITMAP->m_surface->GetSize(&w, NULL);
 211     return w;
 212 }
 213
 214 int wxBitmap::GetDepth() const
 215 {
 216     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 217
 218     return M_BITMAP->m_surface->GetDepth();
 219 }
 220
 221 wxMask *wxBitmap::GetMask() const
 222 {
 223     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 224
 225     return M_BITMAP->m_mask;
 226 }
 227
 228 void wxBitmap::SetMask(wxMask *mask)
 229 {
 230     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 231
 232     AllocExclusive();
 233     delete M_BITMAP->m_mask;
 234     M_BITMAP->m_mask = mask;
 235 }
 236
 237 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 238 {
 239     *this = *((wxBitmap*)(&icon));
 240     return true;
 241 }
 242
 243 wxBitmap wxBitmap::GetSubBitmap(const wxRect& rect) const
 244 {
 245     wxCHECK_MSG( Ok() &&
 246                  rect.x >= 0 && rect.y >= 0 &&
 247                  rect.x+rect.width <= GetWidth() &&
 248                  rect.y+rect.height <= GetHeight(),
 249                  wxNullBitmap,
 250                  wxT("invalid bitmap or bitmap region") );
 251
 252     // NB: DirectFB subsurfaces share the same pixels buffer, so we must
 253     //     clone the obtained subsurface
 254     DFBRectangle r = { rect.x, rect.y, rect.width, rect.height };
 255     return wxBitmap(M_BITMAP->m_surface->GetSubSurface(&r)->Clone());
 256 }
 257
 258 #warning "to common code"
 259 bool wxBitmap::LoadFile(const wxString &name, wxBitmapType type)
 260 {
 261     UnRef();
 262
 263     wxBitmapHandler *handler = FindHandler(type);
 264
 265     if ( handler == NULL )
 266     {
 267         wxImage image;
 268         if ( !image.LoadFile(name, type) || !image.Ok() )
 269         {
 270             wxLogError(_("No bitmap handler for type %d defined."), type);
 271             return false;
 272         }
 273         else
 274         {
 275             *this = wxBitmap(image);
 276             return true;
 277         }
 278     }
 279
 280     m_refData = new wxBitmapRefData();
 281
 282     return handler->LoadFile(this, name, type, -1, -1);
 283 }
 284
 285 #warning "to common code"
 286 bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type, const wxPalette *palette) const
 287 {
 288     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 289
 290     wxBitmapHandler *handler = FindHandler(type);
 291
 292     if ( handler == NULL )
 293     {
 294         wxImage image = ConvertToImage();
 295 #if wxUSE_PALETTE
 296         if ( palette )
 297             image.SetPalette(*palette);
 298 #endif // wxUSE_PALETTE
 299
 300         if ( image.Ok() )
 301             return image.SaveFile(filename, type);
 302         else
 303         {
 304             wxLogError(_("No bitmap handler for type %d defined."), type);
 305             return false;
 306         }
 307     }
 308
 309     return handler->SaveFile(this, filename, type, palette);
 310 }
 311
 312 #if wxUSE_PALETTE
 313 wxPalette *wxBitmap::GetPalette() const
 314 {
 315     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 316
 317     return M_BITMAP->m_palette;
 318 }
 319
 320 void wxBitmap::SetPalette(const wxPalette& palette)
 321 {
 322     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 323     wxCHECK_RET( GetDepth() > 1 && GetDepth() <= 8, wxT("cannot set palette for bitmap of this depth") );
 324
 325     AllocExclusive();
 326     delete M_BITMAP->m_palette;
 327     M_BITMAP->m_palette = NULL;
 328
 329     if ( !palette.Ok() ) return;
 330
 331     M_BITMAP->m_palette = new wxPalette(palette);
 332 }
 333 #endif // wxUSE_PALETTE
 334
 335 void wxBitmap::SetHeight(int height)
 336 {
 337     AllocExclusive();
 338
 339     wxFAIL_MSG( _T("SetHeight not implemented") );
 340 }
 341
 342 void wxBitmap::SetWidth(int width)
 343 {
 344     AllocExclusive();
 345
 346     wxFAIL_MSG( _T("SetWidth not implemented") );
 347 }
 348
 349 void wxBitmap::SetDepth(int depth)
 350 {
 351     AllocExclusive();
 352
 353     wxFAIL_MSG( _T("SetDepth not implemented") );
 354 }
 355
 356 wxIDirectFBSurfacePtr wxBitmap::GetDirectFBSurface() const
 357 {
 358     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 359
 360     return M_BITMAP->m_surface;
 361 }
 362
 363 wxObjectRefData *wxBitmap::CreateRefData() const
 364 {
 365     return new wxBitmapRefData;
 366 }
 367
 368 wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *data) const
 369 {
 370     return new wxBitmapRefData(*(wxBitmapRefData *)data);
 371 }
 372
 373
 374 /*static*/
 375 void wxBitmap::InitStandardHandlers()
 376 {
 377     // not wxBitmap handlers, we rely on wxImage
 378 }