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 #include "wx/rawbmp.h"
  25
  26 #include <gtk/gtk.h>
  27
  28 //-----------------------------------------------------------------------------
  29 // data
  30 //-----------------------------------------------------------------------------
  31
  32 extern GtkWidget *wxGetRootWindow();
  33
  34 //-----------------------------------------------------------------------------
  35 // wxMask
  36 //-----------------------------------------------------------------------------
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  39
  40 wxMask::wxMask()
  41 {
  42     m_bitmap = (GdkBitmap *) NULL;
  43 }
  44
  45 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  46 {
  47     m_bitmap = (GdkBitmap *) NULL;
  48     Create( bitmap, colour );
  49 }
  50
  51 #if wxUSE_PALETTE
  52 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  53 {
  54     m_bitmap = (GdkBitmap *) NULL;
  55     Create( bitmap, paletteIndex );
  56 }
  57 #endif // wxUSE_PALETTE
  58
  59 wxMask::wxMask( const wxBitmap& bitmap )
  60 {
  61     m_bitmap = (GdkBitmap *) NULL;
  62     Create( bitmap );
  63 }
  64
  65 wxMask::~wxMask()
  66 {
  67     if (m_bitmap)
  68         g_object_unref (m_bitmap);
  69 }
  70
  71 bool wxMask::Create( const wxBitmap& bitmap,
  72                      const wxColour& colour )
  73 {
  74     if (m_bitmap)
  75     {
  76         g_object_unref (m_bitmap);
  77         m_bitmap = (GdkBitmap*) NULL;
  78     }
  79
  80     const int w = bitmap.GetWidth();
  81     const int h = bitmap.GetHeight();
  82
  83     // create mask as XBM format bitmap
  84
  85     // one bit per pixel, each row starts on a byte boundary
  86     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  87     wxByte* out = new wxByte[out_size];
  88     // set bits are unmasked
  89     memset(out, 0xff, out_size);
  90     unsigned bit_index = 0;
  91     if (bitmap.HasPixbuf())
  92     {
  93         const wxByte r_mask = colour.Red();
  94         const wxByte g_mask = colour.Green();
  95         const wxByte b_mask = colour.Blue();
  96         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
  97         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
  98         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
  99         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 100         for (int y = 0; y < h; y++, in += rowpadding)
 101         {
 102             for (int x = 0; x < w; x++, in += inc, bit_index++)
 103                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 104                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 105             // move index to next byte boundary
 106             bit_index = (bit_index + 7) & ~7u;
 107         }
 108     }
 109     else
 110     {
 111         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 112         GdkColormap* colormap = gdk_image_get_colormap(image);
 113         guint32 mask_pixel;
 114         if (colormap == NULL)
 115             // mono bitmap, white is pixel value 0
 116             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 117         else
 118         {
 119             wxColor c(colour);
 120             c.CalcPixel(colormap);
 121             mask_pixel = c.GetPixel();
 122         }
 123         for (int y = 0; y < h; y++)
 124         {
 125             for (int x = 0; x < w; x++, bit_index++)
 126                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 127                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 128             bit_index = (bit_index + 7) & ~7u;
 129         }
 130         g_object_unref(image);
 131     }
 132     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 133     delete[] out;
 134     return true;
 135 }
 136
 137 #if wxUSE_PALETTE
 138 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 139 {
 140     unsigned char r,g,b;
 141     wxPalette *pal = bitmap.GetPalette();
 142
 143     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 144
 145     pal->GetRGB(paletteIndex, &r, &g, &b);
 146
 147     return Create(bitmap, wxColour(r, g, b));
 148 }
 149 #endif // wxUSE_PALETTE
 150
 151 bool wxMask::Create( const wxBitmap& bitmap )
 152 {
 153     if (m_bitmap)
 154     {
 155         g_object_unref (m_bitmap);
 156         m_bitmap = (GdkBitmap*) NULL;
 157     }
 158
 159     if (!bitmap.Ok()) return false;
 160
 161     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 162
 163     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 164
 165     if (!m_bitmap) return false;
 166
 167     GdkGC *gc = gdk_gc_new( m_bitmap );
 168     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 169     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 170     g_object_unref (gc);
 171
 172     return true;
 173 }
 174
 175 GdkBitmap *wxMask::GetBitmap() const
 176 {
 177     return m_bitmap;
 178 }
 179
 180 //-----------------------------------------------------------------------------
 181 // wxBitmap
 182 //-----------------------------------------------------------------------------
 183
 184 class wxBitmapRefData: public wxGDIRefData
 185 {
 186 public:
 187     wxBitmapRefData();
 188     virtual ~wxBitmapRefData();
 189
 190     virtual bool IsOk() const { return m_pixmap || m_pixbuf; }
 191
 192     GdkPixmap      *m_pixmap;
 193     GdkPixbuf      *m_pixbuf;
 194     wxMask         *m_mask;
 195     int             m_width;
 196     int             m_height;
 197     int             m_bpp;
 198 #if wxUSE_PALETTE
 199     wxPalette      *m_palette;
 200 #endif // wxUSE_PALETTE
 201 };
 202
 203 wxBitmapRefData::wxBitmapRefData()
 204 {
 205     m_pixmap = (GdkPixmap *) NULL;
 206     m_pixbuf = (GdkPixbuf *) NULL;
 207     m_mask = (wxMask *) NULL;
 208     m_width = 0;
 209     m_height = 0;
 210     m_bpp = 0;
 211 #if wxUSE_PALETTE
 212     m_palette = (wxPalette *) NULL;
 213 #endif // wxUSE_PALETTE
 214 }
 215
 216 wxBitmapRefData::~wxBitmapRefData()
 217 {
 218     if (m_pixmap)
 219         g_object_unref (m_pixmap);
 220     if (m_pixbuf)
 221         g_object_unref (m_pixbuf);
 222     delete m_mask;
 223 #if wxUSE_PALETTE
 224     delete m_palette;
 225 #endif // wxUSE_PALETTE
 226 }
 227
 228 //-----------------------------------------------------------------------------
 229
 230 #define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 231
 232 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 233
 234 wxBitmap::wxBitmap(int width, int height, int depth)
 235 {
 236     Create(width, height, depth);
 237 }
 238
 239 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 240 {
 241     LoadFile(filename, type);
 242 }
 243
 244 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 245 {
 246     wxASSERT(depth == 1);
 247     if (width > 0 && height > 0 && depth == 1)
 248     {
 249         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 250
 251         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 252     }
 253 }
 254
 255 wxBitmap::wxBitmap(const char* const* bits)
 256 {
 257     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 258
 259     GdkBitmap* mask = NULL;
 260     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, wx_const_cast(char**, bits)));
 261
 262     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 263     {
 264         M_BMPDATA->m_mask = new wxMask;
 265         M_BMPDATA->m_mask->m_bitmap = mask;
 266     }
 267 }
 268
 269 wxBitmap::~wxBitmap()
 270 {
 271 }
 272
 273 bool wxBitmap::Create( int width, int height, int depth )
 274 {
 275     UnRef();
 276
 277     if ( width <= 0 || height <= 0 )
 278     {
 279         return false;
 280     }
 281
 282     if (depth == 32)
 283     {
 284         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 285     }
 286     else
 287     {
 288         if (depth != 1)
 289         {
 290             const GdkVisual* visual = wxTheApp->GetGdkVisual();
 291             if (depth == -1)
 292                 depth = visual->depth;
 293
 294             wxCHECK_MSG(depth == visual->depth, false, wxT("invalid bitmap depth"));
 295         }
 296
 297         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 298     }
 299
 300     return Ok();
 301 }
 302
 303 wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy) const
 304 {
 305     wxBitmap bmp;
 306
 307     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 308
 309     int width = wxMax(newx, 1);
 310     int height = wxMax(newy, 1);
 311     width = wxMin(width, clipwidth);
 312     height = wxMin(height, clipheight);
 313
 314     const double scale_x = double(newx) / M_BMPDATA->m_width;
 315     const double scale_y = double(newy) / M_BMPDATA->m_height;
 316
 317     // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
 318     // back, is faster than scaling pixmap ourselves.
 319
 320     // use pixbuf if already available,
 321     // otherwise create temporary pixbuf from pixmap
 322     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 323     if (pixbuf)
 324         g_object_ref(pixbuf);
 325     else
 326         pixbuf = gdk_pixbuf_get_from_drawable(
 327             NULL, M_BMPDATA->m_pixmap, NULL,
 328             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 329
 330     // new pixbuf for scaled wxBitmap
 331     GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
 332         GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
 333
 334     // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
 335     // images, but the only one which preserves sharp edges
 336     gdk_pixbuf_scale(
 337         pixbuf, pixbuf_scaled,
 338         0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
 339         GDK_INTERP_NEAREST);
 340
 341     g_object_unref(pixbuf);
 342     bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
 343
 344     if (M_BMPDATA->m_mask)
 345     {
 346         pixbuf = gdk_pixbuf_get_from_drawable(
 347             NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
 348             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 349
 350         pixbuf_scaled = gdk_pixbuf_new(
 351             GDK_COLORSPACE_RGB, false, 8, width, height);
 352
 353         gdk_pixbuf_scale(
 354             pixbuf, pixbuf_scaled,
 355             0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
 356             GDK_INTERP_NEAREST);
 357
 358         g_object_unref(pixbuf);
 359
 360         // use existing functionality to create mask from scaled pixbuf
 361         wxBitmap maskbmp;
 362         maskbmp.SetPixbuf(pixbuf_scaled);
 363         bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
 364     }
 365     return bmp;
 366 }
 367
 368 #if wxUSE_IMAGE
 369
 370 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 371 {
 372     UnRef();
 373
 374     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 375     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 376
 377     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 378         return false;
 379
 380     // create pixbuf if image has alpha and requested depth is compatible
 381     if (image.HasAlpha() && (depth == -1 || depth == 32))
 382         return CreateFromImageAsPixbuf(image);
 383
 384     // otherwise create pixmap, if alpha is present it will be converted to mask
 385     return CreateFromImageAsPixmap(image, depth);
 386 }
 387
 388 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 389 {
 390     const int w = image.GetWidth();
 391     const int h = image.GetHeight();
 392     if (depth == 1)
 393     {
 394         // create XBM format bitmap
 395
 396         // one bit per pixel, each row starts on a byte boundary
 397         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 398         wxByte* out = new wxByte[out_size];
 399         // set bits are black
 400         memset(out, 0xff, out_size);
 401         const wxByte* in = image.GetData();
 402         unsigned bit_index = 0;
 403         for (int y = 0; y < h; y++)
 404         {
 405             for (int x = 0; x < w; x++, in += 3, bit_index++)
 406                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 407                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 408             // move index to next byte boundary
 409             bit_index = (bit_index + 7) & ~7u;
 410         }
 411         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 412         delete[] out;
 413     }
 414     else
 415     {
 416         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 417         GdkGC* gc = gdk_gc_new(M_BMPDATA->m_pixmap);
 418         gdk_draw_rgb_image(
 419             M_BMPDATA->m_pixmap, gc,
 420             0, 0, w, h,
 421             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 422         g_object_unref(gc);
 423     }
 424
 425     const wxByte* alpha = image.GetAlpha();
 426     if (alpha != NULL || image.HasMask())
 427     {
 428         // create mask as XBM format bitmap
 429
 430         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 431         wxByte* out = new wxByte[out_size];
 432         memset(out, 0xff, out_size);
 433         unsigned bit_index = 0;
 434         if (alpha != NULL)
 435         {
 436             for (int y = 0; y < h; y++)
 437             {
 438                 for (int x = 0; x < w; x++, bit_index++)
 439                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 440                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 441                 bit_index = (bit_index + 7) & ~7u;
 442             }
 443         }
 444         else
 445         {
 446             const wxByte r_mask = image.GetMaskRed();
 447             const wxByte g_mask = image.GetMaskGreen();
 448             const wxByte b_mask = image.GetMaskBlue();
 449             const wxByte* in = image.GetData();
 450             for (int y = 0; y < h; y++)
 451             {
 452                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 453                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 454                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 455                 bit_index = (bit_index + 7) & ~7u;
 456             }
 457         }
 458         wxMask* mask = new wxMask;
 459         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 460         SetMask(mask);
 461         delete[] out;
 462     }
 463     return true;
 464 }
 465
 466 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 467 {
 468     wxASSERT(image.HasAlpha());
 469
 470     int width = image.GetWidth();
 471     int height = image.GetHeight();
 472
 473     Create(width, height, 32);
 474     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 475     if (!pixbuf)
 476         return false;
 477
 478     // Copy the data:
 479     const unsigned char* in = image.GetData();
 480     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 481     unsigned char *alpha = image.GetAlpha();
 482
 483     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 484
 485     for (int y = 0; y < height; y++, out += rowpad)
 486     {
 487         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 488         {
 489             out[0] = in[0];
 490             out[1] = in[1];
 491             out[2] = in[2];
 492             out[3] = *alpha;
 493         }
 494     }
 495
 496     return true;
 497 }
 498
 499 wxImage wxBitmap::ConvertToImage() const
 500 {
 501     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 502
 503     const int w = GetWidth();
 504     const int h = GetHeight();
 505     wxImage image(w, h, false);
 506     unsigned char *data = image.GetData();
 507
 508     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 509
 510     // prefer pixbuf if available, it will preserve alpha and should be quicker
 511     if (HasPixbuf())
 512     {
 513         GdkPixbuf *pixbuf = GetPixbuf();
 514         unsigned char* alpha = NULL;
 515         if (gdk_pixbuf_get_has_alpha(pixbuf))
 516         {
 517             image.SetAlpha();
 518             alpha = image.GetAlpha();
 519         }
 520         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 521         unsigned char *out = data;
 522         const int inc = 3 + int(alpha != NULL);
 523         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 524
 525         for (int y = 0; y < h; y++, in += rowpad)
 526         {
 527             for (int x = 0; x < w; x++, in += inc, out += 3)
 528             {
 529                 out[0] = in[0];
 530                 out[1] = in[1];
 531                 out[2] = in[2];
 532                 if (alpha != NULL)
 533                     *alpha++ = in[3];
 534             }
 535         }
 536     }
 537     else
 538     {
 539         GdkPixmap* pixmap = GetPixmap();
 540         GdkPixmap* pixmap_invert = NULL;
 541         if (GetDepth() == 1)
 542         {
 543             // mono bitmaps are inverted, i.e. 0 is white
 544             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 545             GdkGC* gc = gdk_gc_new(pixmap_invert);
 546             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 547             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 548             g_object_unref(gc);
 549             pixmap = pixmap_invert;
 550         }
 551         // create a pixbuf which shares data with the wxImage
 552         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 553             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 554
 555         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 556
 557         g_object_unref(pixbuf);
 558         if (pixmap_invert != NULL)
 559             g_object_unref(pixmap_invert);
 560     }
 561     // convert mask, unless there is already alpha
 562     if (GetMask() && !image.HasAlpha())
 563     {
 564         // we hard code the mask colour for now but we could also make an
 565         // effort (and waste time) to choose a colour not present in the
 566         // image already to avoid having to fudge the pixels below --
 567         // whether it's worth to do it is unclear however
 568         const int MASK_RED = 1;
 569         const int MASK_GREEN = 2;
 570         const int MASK_BLUE = 3;
 571         const int MASK_BLUE_REPLACEMENT = 2;
 572
 573         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 574         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 575
 576         for (int y = 0; y < h; y++)
 577         {
 578             for (int x = 0; x < w; x++, data += 3)
 579             {
 580                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 581                 {
 582                     data[0] = MASK_RED;
 583                     data[1] = MASK_GREEN;
 584                     data[2] = MASK_BLUE;
 585                 }
 586                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 587                 {
 588                     // we have to fudge the colour a bit to prevent
 589                     // this pixel from appearing transparent
 590                     data[2] = MASK_BLUE_REPLACEMENT;
 591                 }
 592             }
 593         }
 594         g_object_unref(image_mask);
 595     }
 596
 597     return image;
 598 }
 599
 600 #endif // wxUSE_IMAGE
 601
 602 int wxBitmap::GetHeight() const
 603 {
 604     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 605
 606     return M_BMPDATA->m_height;
 607 }
 608
 609 int wxBitmap::GetWidth() const
 610 {
 611     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 612
 613     return M_BMPDATA->m_width;
 614 }
 615
 616 int wxBitmap::GetDepth() const
 617 {
 618     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 619
 620     return M_BMPDATA->m_bpp;
 621 }
 622
 623 wxMask *wxBitmap::GetMask() const
 624 {
 625     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 626
 627     return M_BMPDATA->m_mask;
 628 }
 629
 630 void wxBitmap::SetMask( wxMask *mask )
 631 {
 632     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 633
 634     AllocExclusive();
 635     delete M_BMPDATA->m_mask;
 636     M_BMPDATA->m_mask = mask;
 637 }
 638
 639 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 640 {
 641     *this = icon;
 642     return Ok();
 643 }
 644
 645 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 646 {
 647     wxBitmap ret;
 648
 649     wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
 650     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 651                 rect.x + rect.width <= M_BMPDATA->m_width &&
 652                 rect.y + rect.height <= M_BMPDATA->m_height,
 653                 ret, wxT("invalid bitmap region"));
 654
 655     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 656     {
 657         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 658                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 659                                            8, rect.width, rect.height);
 660         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 661         gdk_pixbuf_copy_area(GetPixbuf(),
 662                              rect.x, rect.y, rect.width, rect.height,
 663                              pixbuf, 0, 0);
 664     }
 665     else
 666     {
 667         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 668         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 669         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 670         g_object_unref (gc);
 671     }
 672     // make mask, unless there is already alpha
 673     if (GetMask() && !HasAlpha())
 674     {
 675         wxMask *mask = new wxMask;
 676         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 677
 678         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 679         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 680         g_object_unref (gc);
 681
 682         ret.SetMask( mask );
 683     }
 684
 685     return ret;
 686 }
 687
 688 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 689 {
 690     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 691
 692 #if wxUSE_IMAGE
 693     // Try to save the bitmap via wxImage handlers:
 694     wxImage image = ConvertToImage();
 695     return image.Ok() && image.SaveFile(name, type);
 696 #else // !wxUSE_IMAGE
 697     wxUnusedVar(name);
 698     wxUnusedVar(type);
 699
 700     return false;
 701 #endif // wxUSE_IMAGE
 702 }
 703
 704 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 705 {
 706     UnRef();
 707
 708     if (type == wxBITMAP_TYPE_XPM)
 709     {
 710         GdkBitmap *mask = (GdkBitmap*) NULL;
 711         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 712
 713         if (mask)
 714         {
 715             M_BMPDATA->m_mask = new wxMask;
 716             M_BMPDATA->m_mask->m_bitmap = mask;
 717         }
 718     }
 719 #if wxUSE_IMAGE
 720     else // try if wxImage can load it
 721     {
 722         wxImage image;
 723         if (image.LoadFile(name, type) && image.Ok())
 724             CreateFromImage(image, -1);
 725     }
 726 #endif // wxUSE_IMAGE
 727
 728     return Ok();
 729 }
 730
 731 #if wxUSE_PALETTE
 732 wxPalette *wxBitmap::GetPalette() const
 733 {
 734     wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 735
 736     return M_BMPDATA->m_palette;
 737 }
 738
 739 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 740 {
 741     // TODO
 742 }
 743 #endif // wxUSE_PALETTE
 744
 745 void wxBitmap::SetHeight( int height )
 746 {
 747     AllocExclusive();
 748     M_BMPDATA->m_height = height;
 749 }
 750
 751 void wxBitmap::SetWidth( int width )
 752 {
 753     AllocExclusive();
 754     M_BMPDATA->m_width = width;
 755 }
 756
 757 void wxBitmap::SetDepth( int depth )
 758 {
 759     AllocExclusive();
 760     M_BMPDATA->m_bpp = depth;
 761 }
 762
 763 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 764 {
 765     if (!m_refData)
 766         m_refData = new wxBitmapRefData;
 767
 768     // AllocExclusive should not be needed for this internal function
 769     wxASSERT(m_refData->GetRefCount() == 1);
 770     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 771     M_BMPDATA->m_pixmap = pixmap;
 772     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 773     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 774     PurgeOtherRepresentations(Pixmap);
 775 }
 776
 777 GdkPixmap *wxBitmap::GetPixmap() const
 778 {
 779     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 780
 781     // create the pixmap on the fly if we use Pixbuf representation:
 782     if (M_BMPDATA->m_pixmap == NULL)
 783     {
 784         GdkPixmap** pmask = NULL;
 785         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 786         {
 787             // make new mask from alpha
 788             delete M_BMPDATA->m_mask;
 789             M_BMPDATA->m_mask = new wxMask;
 790             pmask = &M_BMPDATA->m_mask->m_bitmap;
 791         }
 792         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 793                                           &M_BMPDATA->m_pixmap,
 794                                           pmask,
 795                                           0x80 /* alpha threshold */);
 796     }
 797
 798     return M_BMPDATA->m_pixmap;
 799 }
 800
 801 bool wxBitmap::HasPixmap() const
 802 {
 803     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 804
 805     return M_BMPDATA->m_pixmap != NULL;
 806 }
 807
 808 GdkPixbuf *wxBitmap::GetPixbuf() const
 809 {
 810     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 811
 812     if (M_BMPDATA->m_pixbuf == NULL)
 813     {
 814         int width = GetWidth();
 815         int height = GetHeight();
 816
 817         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 818                                            GetMask() != NULL,
 819                                            8, width, height);
 820         M_BMPDATA->m_pixbuf = pixbuf;
 821         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 822                                      0, 0, 0, 0, width, height);
 823
 824         // apply the mask to created pixbuf:
 825         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 826         {
 827             GdkPixbuf *pmask =
 828                 gdk_pixbuf_get_from_drawable(NULL,
 829                                              M_BMPDATA->m_mask->GetBitmap(),
 830                                              NULL,
 831                                              0, 0, 0, 0, width, height);
 832             if (pmask)
 833             {
 834                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 835                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 836                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 837                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 838
 839                 for (int y = 0; y < height;
 840                      y++, bmp += bmprowinc, mask += maskrowinc)
 841                 {
 842                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 843                     {
 844                         if (mask[0] == 0 /*black pixel*/)
 845                             bmp[3] = 0;
 846                     }
 847                 }
 848
 849                 g_object_unref (pmask);
 850             }
 851         }
 852     }
 853
 854     return M_BMPDATA->m_pixbuf;
 855 }
 856
 857 bool wxBitmap::HasPixbuf() const
 858 {
 859     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 860
 861     return M_BMPDATA->m_pixbuf != NULL;
 862 }
 863
 864 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 865 {
 866     if (!m_refData)
 867         m_refData = new wxBitmapRefData;
 868
 869     // AllocExclusive should not be needed for this internal function
 870     wxASSERT(m_refData->GetRefCount() == 1);
 871     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 872     M_BMPDATA->m_pixbuf = pixbuf;
 873     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 874     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 875     // if depth specified
 876     if (depth != 0)
 877         M_BMPDATA->m_bpp = depth;
 878     else if (M_BMPDATA->m_bpp == 0)
 879         // use something reasonable
 880         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 881     PurgeOtherRepresentations(Pixbuf);
 882 }
 883
 884 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 885 {
 886     if (keep == Pixmap && HasPixbuf())
 887     {
 888         g_object_unref (M_BMPDATA->m_pixbuf);
 889         M_BMPDATA->m_pixbuf = NULL;
 890     }
 891     if (keep == Pixbuf && HasPixmap())
 892     {
 893         g_object_unref (M_BMPDATA->m_pixmap);
 894         M_BMPDATA->m_pixmap = NULL;
 895     }
 896 }
 897
 898 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 899 {
 900     void* bits = NULL;
 901     GdkPixbuf *pixbuf = GetPixbuf();
 902     const bool hasAlpha = HasAlpha();
 903     // allow access if bpp is valid and matches existence of alpha
 904     if (pixbuf != NULL && (
 905         bpp == 24 && !hasAlpha ||
 906         bpp == 32 && hasAlpha))
 907     {
 908         data.m_height = gdk_pixbuf_get_height( pixbuf );
 909         data.m_width = gdk_pixbuf_get_width( pixbuf );
 910         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 911         bits = gdk_pixbuf_get_pixels(pixbuf);
 912     }
 913     return bits;
 914 }
 915
 916 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 917 {
 918 }
 919
 920 bool wxBitmap::HasAlpha() const
 921 {
 922     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 923         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 924 }
 925
 926 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 927 {
 928     return new wxBitmapRefData;
 929 }
 930
 931 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 932 {
 933     const wxBitmapRefData* oldRef = wx_static_cast(const wxBitmapRefData*, data);
 934     wxBitmapRefData* newRef = new wxBitmapRefData;
 935     newRef->m_width = oldRef->m_width;
 936     newRef->m_height = oldRef->m_height;
 937     newRef->m_bpp = oldRef->m_bpp;
 938     if (oldRef->m_pixmap != NULL)
 939     {
 940         newRef->m_pixmap = gdk_pixmap_new(
 941             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 942             // use pixmap depth, m_bpp may not match
 943             gdk_drawable_get_depth(oldRef->m_pixmap));
 944         GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
 945         gdk_draw_drawable(
 946             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 947         g_object_unref(gc);
 948     }
 949     if (oldRef->m_pixbuf != NULL)
 950     {
 951         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 952     }
 953     if (oldRef->m_mask != NULL)
 954     {
 955         newRef->m_mask = new wxMask;
 956         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 957             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 958         GdkGC* gc = gdk_gc_new(newRef->m_mask->m_bitmap);
 959         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 960             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 961         g_object_unref(gc);
 962     }
 963 #if wxUSE_PALETTE
 964     // implement this if SetPalette is ever implemented
 965     wxASSERT(oldRef->m_palette == NULL);
 966 #endif
 967
 968     return newRef;
 969 }
 970
 971 //-----------------------------------------------------------------------------
 972 // wxBitmapHandler
 973 //-----------------------------------------------------------------------------
 974
 975 IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
 976
 977 /* static */ void wxBitmap::InitStandardHandlers()
 978 {
 979     // TODO: Insert handler based on GdkPixbufs handler later
 980 }