src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/palette.h"
  18     #include "wx/icon.h"
  19     #include "wx/math.h"
  20     #include "wx/image.h"
  21     #include "wx/colour.h"
  22 #endif
  23
  24 // HP aCC for PA-RISC can't compile rawbmp.h
  25 #if !defined(__HP_aCC) || !defined(__hppa)
  26     #include "wx/rawbmp.h"
  27 #endif
  28
  29 #include "wx/gtk/private/object.h"
  30
  31 #include <gtk/gtk.h>
  32
  33 //-----------------------------------------------------------------------------
  34 // data
  35 //-----------------------------------------------------------------------------
  36
  37 extern GtkWidget *wxGetRootWindow();
  38
  39 //-----------------------------------------------------------------------------
  40 // wxMask
  41 //-----------------------------------------------------------------------------
  42
  43 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  44
  45 wxMask::wxMask()
  46 {
  47     m_bitmap = NULL;
  48 }
  49
  50 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  51 {
  52     m_bitmap = NULL;
  53     Create( bitmap, colour );
  54 }
  55
  56 #if wxUSE_PALETTE
  57 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  58 {
  59     m_bitmap = NULL;
  60     Create( bitmap, paletteIndex );
  61 }
  62 #endif // wxUSE_PALETTE
  63
  64 wxMask::wxMask( const wxBitmap& bitmap )
  65 {
  66     m_bitmap = NULL;
  67     Create( bitmap );
  68 }
  69
  70 wxMask::~wxMask()
  71 {
  72     if (m_bitmap)
  73         g_object_unref (m_bitmap);
  74 }
  75
  76 bool wxMask::Create( const wxBitmap& bitmap,
  77                      const wxColour& colour )
  78 {
  79     if (m_bitmap)
  80     {
  81         g_object_unref (m_bitmap);
  82         m_bitmap = NULL;
  83     }
  84
  85     const int w = bitmap.GetWidth();
  86     const int h = bitmap.GetHeight();
  87
  88     // create mask as XBM format bitmap
  89
  90     // one bit per pixel, each row starts on a byte boundary
  91     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  92     wxByte* out = new wxByte[out_size];
  93     // set bits are unmasked
  94     memset(out, 0xff, out_size);
  95     unsigned bit_index = 0;
  96     if (bitmap.HasPixbuf())
  97     {
  98         const wxByte r_mask = colour.Red();
  99         const wxByte g_mask = colour.Green();
 100         const wxByte b_mask = colour.Blue();
 101         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
 102         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 103         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 104         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 105         for (int y = 0; y < h; y++, in += rowpadding)
 106         {
 107             for (int x = 0; x < w; x++, in += inc, bit_index++)
 108                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 109                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 110             // move index to next byte boundary
 111             bit_index = (bit_index + 7) & ~7u;
 112         }
 113     }
 114     else
 115     {
 116         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 117         GdkColormap* colormap = gdk_image_get_colormap(image);
 118         guint32 mask_pixel;
 119         if (colormap == NULL)
 120             // mono bitmap, white is pixel value 0
 121             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 122         else
 123         {
 124             wxColor c(colour);
 125             c.CalcPixel(colormap);
 126             mask_pixel = c.GetPixel();
 127         }
 128         for (int y = 0; y < h; y++)
 129         {
 130             for (int x = 0; x < w; x++, bit_index++)
 131                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 132                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 133             bit_index = (bit_index + 7) & ~7u;
 134         }
 135         g_object_unref(image);
 136     }
 137     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 138     delete[] out;
 139     return true;
 140 }
 141
 142 #if wxUSE_PALETTE
 143 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 144 {
 145     unsigned char r,g,b;
 146     wxPalette *pal = bitmap.GetPalette();
 147
 148     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 149
 150     pal->GetRGB(paletteIndex, &r, &g, &b);
 151
 152     return Create(bitmap, wxColour(r, g, b));
 153 }
 154 #endif // wxUSE_PALETTE
 155
 156 bool wxMask::Create( const wxBitmap& bitmap )
 157 {
 158     if (m_bitmap)
 159     {
 160         g_object_unref (m_bitmap);
 161         m_bitmap = NULL;
 162     }
 163
 164     if (!bitmap.IsOk()) return false;
 165
 166     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 167
 168     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 169
 170     if (!m_bitmap) return false;
 171
 172     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 173     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 174     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 175
 176     return true;
 177 }
 178
 179 GdkBitmap *wxMask::GetBitmap() const
 180 {
 181     return m_bitmap;
 182 }
 183
 184 //-----------------------------------------------------------------------------
 185 // wxBitmap
 186 //-----------------------------------------------------------------------------
 187
 188 class wxBitmapRefData: public wxGDIRefData
 189 {
 190 public:
 191     wxBitmapRefData();
 192     virtual ~wxBitmapRefData();
 193
 194     virtual bool IsOk() const { return m_pixmap || m_pixbuf; }
 195
 196     GdkPixmap      *m_pixmap;
 197     GdkPixbuf      *m_pixbuf;
 198     wxMask         *m_mask;
 199     int             m_width;
 200     int             m_height;
 201     int             m_bpp;
 202 #if wxUSE_PALETTE
 203     wxPalette      *m_palette;
 204 #endif // wxUSE_PALETTE
 205 };
 206
 207 wxBitmapRefData::wxBitmapRefData()
 208 {
 209     m_pixmap = NULL;
 210     m_pixbuf = NULL;
 211     m_mask = NULL;
 212     m_width = 0;
 213     m_height = 0;
 214     m_bpp = 0;
 215 #if wxUSE_PALETTE
 216     m_palette = NULL;
 217 #endif // wxUSE_PALETTE
 218 }
 219
 220 wxBitmapRefData::~wxBitmapRefData()
 221 {
 222     if (m_pixmap)
 223         g_object_unref (m_pixmap);
 224     if (m_pixbuf)
 225         g_object_unref (m_pixbuf);
 226     delete m_mask;
 227 #if wxUSE_PALETTE
 228     delete m_palette;
 229 #endif // wxUSE_PALETTE
 230 }
 231
 232 //-----------------------------------------------------------------------------
 233
 234 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 235
 236 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 237
 238 wxBitmap::wxBitmap(int width, int height, int depth)
 239 {
 240     Create(width, height, depth);
 241 }
 242
 243 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 244 {
 245     LoadFile(filename, type);
 246 }
 247
 248 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 249 {
 250     wxASSERT(depth == 1);
 251     if (width > 0 && height > 0 && depth == 1)
 252     {
 253         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 254     }
 255 }
 256
 257 wxBitmap::wxBitmap(const char* const* bits)
 258 {
 259     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 260
 261     GdkBitmap* mask = NULL;
 262     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 263     if (!M_BMPDATA)
 264         return;
 265
 266     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 267     {
 268         M_BMPDATA->m_mask = new wxMask;
 269         M_BMPDATA->m_mask->m_bitmap = mask;
 270     }
 271 }
 272
 273 wxBitmap::~wxBitmap()
 274 {
 275 }
 276
 277 bool wxBitmap::Create( int width, int height, int depth )
 278 {
 279     UnRef();
 280
 281     if ( width <= 0 || height <= 0 )
 282     {
 283         return false;
 284     }
 285
 286     const GdkVisual* visual = wxTheApp->GetGdkVisual();
 287
 288     if (depth == 32)
 289     {
 290         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 291
 292         if (!M_BMPDATA)
 293             return false;
 294
 295         // must initialize alpha, otherwise GetPixmap()
 296         // will create a mask out of garbage
 297         gdk_pixbuf_fill(M_BMPDATA->m_pixbuf, 0x000000ff);
 298     }
 299     else if (depth == 24)
 300     {
 301         if (visual->depth == depth)
 302             SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 303         else
 304             SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, width, height), 24);
 305     }
 306     else
 307     {
 308         if (depth != 1)
 309         {
 310             if (depth == -1)
 311                 depth = visual->depth;
 312         }
 313         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 314     }
 315
 316     return IsOk();
 317 }
 318
 319 #if wxUSE_IMAGE
 320
 321 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 322 {
 323     UnRef();
 324
 325     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 326     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 327
 328     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 329         return false;
 330
 331     // create pixbuf if image has alpha and requested depth is compatible
 332     if (image.HasAlpha() && (depth == -1 || depth == 32))
 333         return CreateFromImageAsPixbuf(image);
 334
 335     // otherwise create pixmap, if alpha is present it will be converted to mask
 336     return CreateFromImageAsPixmap(image, depth);
 337 }
 338
 339 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 340 {
 341     const int w = image.GetWidth();
 342     const int h = image.GetHeight();
 343     if (depth == 1)
 344     {
 345         // create XBM format bitmap
 346
 347         // one bit per pixel, each row starts on a byte boundary
 348         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 349         wxByte* out = new wxByte[out_size];
 350         // set bits are black
 351         memset(out, 0xff, out_size);
 352         const wxByte* in = image.GetData();
 353         unsigned bit_index = 0;
 354         for (int y = 0; y < h; y++)
 355         {
 356             for (int x = 0; x < w; x++, in += 3, bit_index++)
 357                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 358                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 359             // move index to next byte boundary
 360             bit_index = (bit_index + 7) & ~7u;
 361         }
 362         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 363         delete[] out;
 364
 365         if (!M_BMPDATA)     // SetPixmap may have failed
 366             return false;
 367     }
 368     else
 369     {
 370         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 371         if (!M_BMPDATA)
 372             return false;
 373
 374         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 375         gdk_draw_rgb_image(
 376             M_BMPDATA->m_pixmap, gc,
 377             0, 0, w, h,
 378             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 379     }
 380
 381     const wxByte* alpha = image.GetAlpha();
 382     if (alpha != NULL || image.HasMask())
 383     {
 384         // create mask as XBM format bitmap
 385
 386         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 387         wxByte* out = new wxByte[out_size];
 388         memset(out, 0xff, out_size);
 389         unsigned bit_index = 0;
 390         if (alpha != NULL)
 391         {
 392             for (int y = 0; y < h; y++)
 393             {
 394                 for (int x = 0; x < w; x++, bit_index++)
 395                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 396                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 397                 bit_index = (bit_index + 7) & ~7u;
 398             }
 399         }
 400         else
 401         {
 402             const wxByte r_mask = image.GetMaskRed();
 403             const wxByte g_mask = image.GetMaskGreen();
 404             const wxByte b_mask = image.GetMaskBlue();
 405             const wxByte* in = image.GetData();
 406             for (int y = 0; y < h; y++)
 407             {
 408                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 409                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 410                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 411                 bit_index = (bit_index + 7) & ~7u;
 412             }
 413         }
 414         wxMask* mask = new wxMask;
 415         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 416         SetMask(mask);
 417         delete[] out;
 418     }
 419     return IsOk();
 420 }
 421
 422 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 423 {
 424     wxASSERT(image.HasAlpha());
 425
 426     int width = image.GetWidth();
 427     int height = image.GetHeight();
 428
 429     Create(width, height, 32);
 430     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 431     if (!pixbuf)
 432         return false;
 433
 434     // Copy the data:
 435     const unsigned char* in = image.GetData();
 436     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 437     unsigned char *alpha = image.GetAlpha();
 438
 439     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 440
 441     for (int y = 0; y < height; y++, out += rowpad)
 442     {
 443         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 444         {
 445             out[0] = in[0];
 446             out[1] = in[1];
 447             out[2] = in[2];
 448             out[3] = *alpha;
 449         }
 450     }
 451
 452     return true;
 453 }
 454
 455 wxImage wxBitmap::ConvertToImage() const
 456 {
 457     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 458
 459     const int w = GetWidth();
 460     const int h = GetHeight();
 461     wxImage image(w, h, false);
 462     unsigned char *data = image.GetData();
 463
 464     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 465
 466     // prefer pixbuf if available, it will preserve alpha and should be quicker
 467     if (HasPixbuf())
 468     {
 469         GdkPixbuf *pixbuf = GetPixbuf();
 470         unsigned char* alpha = NULL;
 471         if (gdk_pixbuf_get_has_alpha(pixbuf))
 472         {
 473             image.SetAlpha();
 474             alpha = image.GetAlpha();
 475         }
 476         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 477         unsigned char *out = data;
 478         const int inc = 3 + int(alpha != NULL);
 479         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 480
 481         for (int y = 0; y < h; y++, in += rowpad)
 482         {
 483             for (int x = 0; x < w; x++, in += inc, out += 3)
 484             {
 485                 out[0] = in[0];
 486                 out[1] = in[1];
 487                 out[2] = in[2];
 488                 if (alpha != NULL)
 489                     *alpha++ = in[3];
 490             }
 491         }
 492     }
 493     else
 494     {
 495         GdkPixmap* pixmap = GetPixmap();
 496         GdkPixmap* pixmap_invert = NULL;
 497         if (GetDepth() == 1)
 498         {
 499             // mono bitmaps are inverted, i.e. 0 is white
 500             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 501             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 502             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 503             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 504             pixmap = pixmap_invert;
 505         }
 506         // create a pixbuf which shares data with the wxImage
 507         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 508             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 509
 510         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 511
 512         g_object_unref(pixbuf);
 513         if (pixmap_invert != NULL)
 514             g_object_unref(pixmap_invert);
 515     }
 516     // convert mask, unless there is already alpha
 517     if (GetMask() && !image.HasAlpha())
 518     {
 519         // we hard code the mask colour for now but we could also make an
 520         // effort (and waste time) to choose a colour not present in the
 521         // image already to avoid having to fudge the pixels below --
 522         // whether it's worth to do it is unclear however
 523         const int MASK_RED = 1;
 524         const int MASK_GREEN = 2;
 525         const int MASK_BLUE = 3;
 526         const int MASK_BLUE_REPLACEMENT = 2;
 527
 528         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 529         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 530
 531         for (int y = 0; y < h; y++)
 532         {
 533             for (int x = 0; x < w; x++, data += 3)
 534             {
 535                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 536                 {
 537                     data[0] = MASK_RED;
 538                     data[1] = MASK_GREEN;
 539                     data[2] = MASK_BLUE;
 540                 }
 541                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 542                 {
 543                     // we have to fudge the colour a bit to prevent
 544                     // this pixel from appearing transparent
 545                     data[2] = MASK_BLUE_REPLACEMENT;
 546                 }
 547             }
 548         }
 549         g_object_unref(image_mask);
 550     }
 551
 552     return image;
 553 }
 554
 555 #endif // wxUSE_IMAGE
 556
 557 int wxBitmap::GetHeight() const
 558 {
 559     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 560
 561     return M_BMPDATA->m_height;
 562 }
 563
 564 int wxBitmap::GetWidth() const
 565 {
 566     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 567
 568     return M_BMPDATA->m_width;
 569 }
 570
 571 int wxBitmap::GetDepth() const
 572 {
 573     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 574
 575     return M_BMPDATA->m_bpp;
 576 }
 577
 578 wxMask *wxBitmap::GetMask() const
 579 {
 580     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 581
 582     return M_BMPDATA->m_mask;
 583 }
 584
 585 void wxBitmap::SetMask( wxMask *mask )
 586 {
 587     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
 588
 589     AllocExclusive();
 590     delete M_BMPDATA->m_mask;
 591     M_BMPDATA->m_mask = mask;
 592 }
 593
 594 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 595 {
 596     *this = icon;
 597     return IsOk();
 598 }
 599
 600 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 601 {
 602     wxBitmap ret;
 603
 604     wxCHECK_MSG(IsOk(), ret, wxT("invalid bitmap"));
 605     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 606                 rect.x + rect.width <= M_BMPDATA->m_width &&
 607                 rect.y + rect.height <= M_BMPDATA->m_height,
 608                 ret, wxT("invalid bitmap region"));
 609
 610     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 611     {
 612         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 613                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 614                                            8, rect.width, rect.height);
 615         if (!pixbuf)
 616             return ret;
 617
 618         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 619         gdk_pixbuf_copy_area(GetPixbuf(),
 620                              rect.x, rect.y, rect.width, rect.height,
 621                              pixbuf, 0, 0);
 622     }
 623     else
 624     {
 625         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 626         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 627         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 628     }
 629     // make mask, unless there is already alpha
 630     if (GetMask() && !HasAlpha())
 631     {
 632         wxMask *mask = new wxMask;
 633         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 634
 635         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 636         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 637
 638         ret.SetMask( mask );
 639     }
 640
 641     return ret;
 642 }
 643
 644 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 645 {
 646     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 647
 648 #if wxUSE_IMAGE
 649     // Try to save the bitmap via wxImage handlers:
 650     wxImage image = ConvertToImage();
 651     return image.Ok() && image.SaveFile(name, type);
 652 #else // !wxUSE_IMAGE
 653     wxUnusedVar(name);
 654     wxUnusedVar(type);
 655
 656     return false;
 657 #endif // wxUSE_IMAGE
 658 }
 659
 660 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 661 {
 662     UnRef();
 663
 664     if (type == wxBITMAP_TYPE_XPM)
 665     {
 666         GdkBitmap *mask = NULL;
 667         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 668         if (!M_BMPDATA)
 669             return false;   // do not set the mask
 670
 671         if (mask)
 672         {
 673             M_BMPDATA->m_mask = new wxMask;
 674             M_BMPDATA->m_mask->m_bitmap = mask;
 675         }
 676     }
 677 #if wxUSE_IMAGE
 678     else // try if wxImage can load it
 679     {
 680         wxImage image;
 681         if (image.LoadFile(name, type) && image.Ok())
 682             CreateFromImage(image, -1);
 683     }
 684 #endif // wxUSE_IMAGE
 685
 686     return IsOk();
 687 }
 688
 689 #if wxUSE_PALETTE
 690 wxPalette *wxBitmap::GetPalette() const
 691 {
 692     wxCHECK_MSG(IsOk(), NULL, wxT("invalid bitmap"));
 693
 694     return M_BMPDATA->m_palette;
 695 }
 696
 697 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 698 {
 699     // TODO
 700 }
 701 #endif // wxUSE_PALETTE
 702
 703 void wxBitmap::SetHeight( int height )
 704 {
 705     AllocExclusive();
 706     M_BMPDATA->m_height = height;
 707 }
 708
 709 void wxBitmap::SetWidth( int width )
 710 {
 711     AllocExclusive();
 712     M_BMPDATA->m_width = width;
 713 }
 714
 715 void wxBitmap::SetDepth( int depth )
 716 {
 717     AllocExclusive();
 718     M_BMPDATA->m_bpp = depth;
 719 }
 720
 721 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 722 {
 723     if (!pixmap)
 724         return;
 725
 726     if (!m_refData)
 727         m_refData = new wxBitmapRefData;
 728
 729     // AllocExclusive should not be needed for this internal function
 730     wxASSERT(m_refData->GetRefCount() == 1);
 731     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 732     M_BMPDATA->m_pixmap = pixmap;
 733     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 734     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 735     PurgeOtherRepresentations(Pixmap);
 736 }
 737
 738 GdkPixmap *wxBitmap::GetPixmap() const
 739 {
 740     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 741
 742     // create the pixmap on the fly if we use Pixbuf representation:
 743     if (M_BMPDATA->m_pixmap == NULL)
 744     {
 745         GdkPixmap** pmask = NULL;
 746         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 747         {
 748             // make new mask from alpha
 749             delete M_BMPDATA->m_mask;
 750             M_BMPDATA->m_mask = new wxMask;
 751             pmask = &M_BMPDATA->m_mask->m_bitmap;
 752         }
 753         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 754                                           &M_BMPDATA->m_pixmap,
 755                                           pmask,
 756                                           0x80 /* alpha threshold */);
 757     }
 758
 759     return M_BMPDATA->m_pixmap;
 760 }
 761
 762 bool wxBitmap::HasPixmap() const
 763 {
 764     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 765
 766     return M_BMPDATA->m_pixmap != NULL;
 767 }
 768
 769 GdkPixbuf *wxBitmap::GetPixbuf() const
 770 {
 771     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 772
 773     if (M_BMPDATA->m_pixbuf == NULL)
 774     {
 775
 776         int width = GetWidth();
 777         int height = GetHeight();
 778
 779         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 780                                            GetMask() != NULL,
 781                                            8, width, height);
 782         M_BMPDATA->m_pixbuf = pixbuf;
 783         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 784                                      0, 0, 0, 0, width, height);
 785         // apply the mask to created pixbuf:
 786         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 787         {
 788             GdkPixbuf *pmask =
 789                 gdk_pixbuf_get_from_drawable(NULL,
 790                                              M_BMPDATA->m_mask->GetBitmap(),
 791                                              NULL,
 792                                              0, 0, 0, 0, width, height);
 793             if (pmask)
 794             {
 795                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 796                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 797                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 798                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 799
 800                 for (int y = 0; y < height;
 801                      y++, bmp += bmprowinc, mask += maskrowinc)
 802                 {
 803                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 804                     {
 805                         if (mask[0] == 0 /*black pixel*/)
 806                             bmp[3] = 0;
 807                     }
 808                 }
 809
 810                 g_object_unref (pmask);
 811             }
 812         }
 813     }
 814
 815     return M_BMPDATA->m_pixbuf;
 816 }
 817
 818 bool wxBitmap::HasPixbuf() const
 819 {
 820     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 821
 822     return M_BMPDATA->m_pixbuf != NULL;
 823 }
 824
 825 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 826 {
 827     if (!pixbuf)
 828         return;
 829
 830     if (!m_refData)
 831         m_refData = new wxBitmapRefData;
 832
 833     // AllocExclusive should not be needed for this internal function
 834     wxASSERT(m_refData->GetRefCount() == 1);
 835     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 836     M_BMPDATA->m_pixbuf = pixbuf;
 837     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 838     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 839     // if depth specified
 840     if (depth != 0)
 841         M_BMPDATA->m_bpp = depth;
 842     else if (M_BMPDATA->m_bpp == 0)
 843         // use something reasonable
 844         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 845     PurgeOtherRepresentations(Pixbuf);
 846 }
 847
 848 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 849 {
 850     if (keep == Pixmap && HasPixbuf())
 851     {
 852         g_object_unref (M_BMPDATA->m_pixbuf);
 853         M_BMPDATA->m_pixbuf = NULL;
 854     }
 855     if (keep == Pixbuf && HasPixmap())
 856     {
 857         g_object_unref (M_BMPDATA->m_pixmap);
 858         M_BMPDATA->m_pixmap = NULL;
 859     }
 860 }
 861
 862 #if !defined(__HP_aCC) || !defined(__hppa)
 863 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 864 {
 865     void* bits = NULL;
 866     GdkPixbuf *pixbuf = GetPixbuf();
 867     const bool hasAlpha = HasAlpha();
 868
 869     // allow access if bpp is valid and matches existence of alpha
 870     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 871     {
 872         data.m_height = gdk_pixbuf_get_height( pixbuf );
 873         data.m_width = gdk_pixbuf_get_width( pixbuf );
 874         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 875         bits = gdk_pixbuf_get_pixels(pixbuf);
 876     }
 877     return bits;
 878 }
 879
 880 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 881 {
 882 }
 883 #endif
 884
 885 bool wxBitmap::HasAlpha() const
 886 {
 887     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 888         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 889 }
 890
 891 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 892 {
 893     return new wxBitmapRefData;
 894 }
 895
 896 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 897 {
 898     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 899     wxBitmapRefData* newRef = new wxBitmapRefData;
 900     newRef->m_width = oldRef->m_width;
 901     newRef->m_height = oldRef->m_height;
 902     newRef->m_bpp = oldRef->m_bpp;
 903     if (oldRef->m_pixmap != NULL)
 904     {
 905         newRef->m_pixmap = gdk_pixmap_new(
 906             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 907             // use pixmap depth, m_bpp may not match
 908             gdk_drawable_get_depth(oldRef->m_pixmap));
 909         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 910         gdk_draw_drawable(
 911             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 912     }
 913     if (oldRef->m_pixbuf != NULL)
 914     {
 915         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 916     }
 917     if (oldRef->m_mask != NULL)
 918     {
 919         newRef->m_mask = new wxMask;
 920         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 921             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 922         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 923         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 924             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 925     }
 926 #if wxUSE_PALETTE
 927     // implement this if SetPalette is ever implemented
 928     wxASSERT(oldRef->m_palette == NULL);
 929 #endif
 930
 931     return newRef;
 932 }
 933
 934 /* static */ void wxBitmap::InitStandardHandlers()
 935 {
 936     // TODO: Insert handler based on GdkPixbufs handler later
 937 }