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 "wx/gtk/private/object.h"
  27
  28 #include <gtk/gtk.h>
  29
  30 //-----------------------------------------------------------------------------
  31 // data
  32 //-----------------------------------------------------------------------------
  33
  34 extern GtkWidget *wxGetRootWindow();
  35
  36 //-----------------------------------------------------------------------------
  37 // wxMask
  38 //-----------------------------------------------------------------------------
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  41
  42 wxMask::wxMask()
  43 {
  44     m_bitmap = (GdkBitmap *) NULL;
  45 }
  46
  47 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  48 {
  49     m_bitmap = (GdkBitmap *) NULL;
  50     Create( bitmap, colour );
  51 }
  52
  53 #if wxUSE_PALETTE
  54 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  55 {
  56     m_bitmap = (GdkBitmap *) NULL;
  57     Create( bitmap, paletteIndex );
  58 }
  59 #endif // wxUSE_PALETTE
  60
  61 wxMask::wxMask( const wxBitmap& bitmap )
  62 {
  63     m_bitmap = (GdkBitmap *) NULL;
  64     Create( bitmap );
  65 }
  66
  67 wxMask::~wxMask()
  68 {
  69     if (m_bitmap)
  70         g_object_unref (m_bitmap);
  71 }
  72
  73 bool wxMask::Create( const wxBitmap& bitmap,
  74                      const wxColour& colour )
  75 {
  76     if (m_bitmap)
  77     {
  78         g_object_unref (m_bitmap);
  79         m_bitmap = (GdkBitmap*) NULL;
  80     }
  81
  82     const int w = bitmap.GetWidth();
  83     const int h = bitmap.GetHeight();
  84
  85     // create mask as XBM format bitmap
  86
  87     // one bit per pixel, each row starts on a byte boundary
  88     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  89     wxByte* out = new wxByte[out_size];
  90     // set bits are unmasked
  91     memset(out, 0xff, out_size);
  92     unsigned bit_index = 0;
  93     if (bitmap.HasPixbuf())
  94     {
  95         const wxByte r_mask = colour.Red();
  96         const wxByte g_mask = colour.Green();
  97         const wxByte b_mask = colour.Blue();
  98         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
  99         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 100         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 101         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 102         for (int y = 0; y < h; y++, in += rowpadding)
 103         {
 104             for (int x = 0; x < w; x++, in += inc, bit_index++)
 105                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 106                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 107             // move index to next byte boundary
 108             bit_index = (bit_index + 7) & ~7u;
 109         }
 110     }
 111     else
 112     {
 113         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 114         GdkColormap* colormap = gdk_image_get_colormap(image);
 115         guint32 mask_pixel;
 116         if (colormap == NULL)
 117             // mono bitmap, white is pixel value 0
 118             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 119         else
 120         {
 121             wxColor c(colour);
 122             c.CalcPixel(colormap);
 123             mask_pixel = c.GetPixel();
 124         }
 125         for (int y = 0; y < h; y++)
 126         {
 127             for (int x = 0; x < w; x++, bit_index++)
 128                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 129                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 130             bit_index = (bit_index + 7) & ~7u;
 131         }
 132         g_object_unref(image);
 133     }
 134     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 135     delete[] out;
 136     return true;
 137 }
 138
 139 #if wxUSE_PALETTE
 140 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 141 {
 142     unsigned char r,g,b;
 143     wxPalette *pal = bitmap.GetPalette();
 144
 145     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 146
 147     pal->GetRGB(paletteIndex, &r, &g, &b);
 148
 149     return Create(bitmap, wxColour(r, g, b));
 150 }
 151 #endif // wxUSE_PALETTE
 152
 153 bool wxMask::Create( const wxBitmap& bitmap )
 154 {
 155     if (m_bitmap)
 156     {
 157         g_object_unref (m_bitmap);
 158         m_bitmap = (GdkBitmap*) NULL;
 159     }
 160
 161     if (!bitmap.Ok()) return false;
 162
 163     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 164
 165     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 166
 167     if (!m_bitmap) return false;
 168
 169     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 170     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 171     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 172
 173     return true;
 174 }
 175
 176 GdkBitmap *wxMask::GetBitmap() const
 177 {
 178     return m_bitmap;
 179 }
 180
 181 //-----------------------------------------------------------------------------
 182 // wxBitmap
 183 //-----------------------------------------------------------------------------
 184
 185 class wxBitmapRefData: public wxGDIRefData
 186 {
 187 public:
 188     wxBitmapRefData();
 189     virtual ~wxBitmapRefData();
 190
 191     virtual bool IsOk() const { return m_pixmap || m_pixbuf; }
 192
 193     GdkPixmap      *m_pixmap;
 194     GdkPixbuf      *m_pixbuf;
 195     wxMask         *m_mask;
 196     int             m_width;
 197     int             m_height;
 198     int             m_bpp;
 199 #if wxUSE_PALETTE
 200     wxPalette      *m_palette;
 201 #endif // wxUSE_PALETTE
 202 };
 203
 204 wxBitmapRefData::wxBitmapRefData()
 205 {
 206     m_pixmap = (GdkPixmap *) NULL;
 207     m_pixbuf = (GdkPixbuf *) NULL;
 208     m_mask = (wxMask *) NULL;
 209     m_width = 0;
 210     m_height = 0;
 211     m_bpp = 0;
 212 #if wxUSE_PALETTE
 213     m_palette = (wxPalette *) NULL;
 214 #endif // wxUSE_PALETTE
 215 }
 216
 217 wxBitmapRefData::~wxBitmapRefData()
 218 {
 219     if (m_pixmap)
 220         g_object_unref (m_pixmap);
 221     if (m_pixbuf)
 222         g_object_unref (m_pixbuf);
 223     delete m_mask;
 224 #if wxUSE_PALETTE
 225     delete m_palette;
 226 #endif // wxUSE_PALETTE
 227 }
 228
 229 //-----------------------------------------------------------------------------
 230
 231 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 232
 233 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 234
 235 wxBitmap::wxBitmap(int width, int height, int depth)
 236 {
 237     Create(width, height, depth);
 238 }
 239
 240 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 241 {
 242     LoadFile(filename, type);
 243 }
 244
 245 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 246 {
 247     wxASSERT(depth == 1);
 248     if (width > 0 && height > 0 && depth == 1)
 249     {
 250         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 251
 252         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 253     }
 254 }
 255
 256 wxBitmap::wxBitmap(const char* const* bits)
 257 {
 258     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 259
 260     GdkBitmap* mask = NULL;
 261     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 262
 263     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 264     {
 265         M_BMPDATA->m_mask = new wxMask;
 266         M_BMPDATA->m_mask->m_bitmap = mask;
 267     }
 268 }
 269
 270 wxBitmap::~wxBitmap()
 271 {
 272 }
 273
 274 bool wxBitmap::Create( int width, int height, int depth )
 275 {
 276     UnRef();
 277
 278     if ( width <= 0 || height <= 0 )
 279     {
 280         return false;
 281     }
 282
 283     const GdkVisual* visual = wxTheApp->GetGdkVisual();
 284
 285     if (depth == 32)
 286     {
 287         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 288         // must initialize alpha, otherwise GetPixmap()
 289         // will create a mask out of garbage
 290         gdk_pixbuf_fill(M_BMPDATA->m_pixbuf, 0x000000ff);
 291     } else
 292     if (depth == 24)
 293     {
 294         if (visual->depth == depth)
 295             SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 296         else
 297             SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, width, height), 24);
 298     }
 299     else
 300     {
 301         if (depth != 1)
 302         {
 303             if (depth == -1)
 304                 depth = visual->depth;
 305         }
 306         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 307     }
 308
 309     return Ok();
 310 }
 311
 312 wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight,
 313                            int width, int height) const
 314 {
 315     wxBitmap bmp;
 316
 317     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 318
 319     width = wxMax(width, 1);
 320     height = wxMax(height, 1);
 321
 322     const double scale_x = double(width) / clipwidth;
 323     const double scale_y = double(height) / clipheight;
 324
 325     // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
 326     // back, is faster than scaling pixmap ourselves.
 327
 328     // use pixbuf if already available,
 329     // otherwise create temporary pixbuf from pixmap
 330     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 331     if (pixbuf)
 332         g_object_ref(pixbuf);
 333     else
 334         pixbuf = gdk_pixbuf_get_from_drawable(
 335             NULL, M_BMPDATA->m_pixmap, NULL,
 336             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 337
 338     // new pixbuf for scaled wxBitmap
 339     GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
 340         GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
 341
 342     // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
 343     // images, but the only one which preserves sharp edges
 344     gdk_pixbuf_scale(
 345         pixbuf, pixbuf_scaled,
 346         0, 0, width, height, -clipx*scale_x, -clipy*scale_y, scale_x, scale_y,
 347         GDK_INTERP_NEAREST);
 348
 349     g_object_unref(pixbuf);
 350     bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
 351
 352     if (M_BMPDATA->m_mask)
 353     {
 354         pixbuf = gdk_pixbuf_get_from_drawable(
 355             NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
 356             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 357
 358         pixbuf_scaled = gdk_pixbuf_new(
 359             GDK_COLORSPACE_RGB, false, 8, width, height);
 360
 361         gdk_pixbuf_scale(
 362             pixbuf, pixbuf_scaled,
 363             0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
 364             GDK_INTERP_NEAREST);
 365
 366         g_object_unref(pixbuf);
 367
 368         // use existing functionality to create mask from scaled pixbuf
 369         wxBitmap maskbmp;
 370         maskbmp.SetPixbuf(pixbuf_scaled);
 371         bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
 372     }
 373     return bmp;
 374 }
 375
 376 #if wxUSE_IMAGE
 377
 378 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 379 {
 380     UnRef();
 381
 382     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 383     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 384
 385     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 386         return false;
 387
 388     // create pixbuf if image has alpha and requested depth is compatible
 389     if (image.HasAlpha() && (depth == -1 || depth == 32))
 390         return CreateFromImageAsPixbuf(image);
 391
 392     // otherwise create pixmap, if alpha is present it will be converted to mask
 393     return CreateFromImageAsPixmap(image, depth);
 394 }
 395
 396 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 397 {
 398     const int w = image.GetWidth();
 399     const int h = image.GetHeight();
 400     if (depth == 1)
 401     {
 402         // create XBM format bitmap
 403
 404         // one bit per pixel, each row starts on a byte boundary
 405         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 406         wxByte* out = new wxByte[out_size];
 407         // set bits are black
 408         memset(out, 0xff, out_size);
 409         const wxByte* in = image.GetData();
 410         unsigned bit_index = 0;
 411         for (int y = 0; y < h; y++)
 412         {
 413             for (int x = 0; x < w; x++, in += 3, bit_index++)
 414                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 415                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 416             // move index to next byte boundary
 417             bit_index = (bit_index + 7) & ~7u;
 418         }
 419         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 420         delete[] out;
 421     }
 422     else
 423     {
 424         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 425         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 426         gdk_draw_rgb_image(
 427             M_BMPDATA->m_pixmap, gc,
 428             0, 0, w, h,
 429             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 430     }
 431
 432     const wxByte* alpha = image.GetAlpha();
 433     if (alpha != NULL || image.HasMask())
 434     {
 435         // create mask as XBM format bitmap
 436
 437         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 438         wxByte* out = new wxByte[out_size];
 439         memset(out, 0xff, out_size);
 440         unsigned bit_index = 0;
 441         if (alpha != NULL)
 442         {
 443             for (int y = 0; y < h; y++)
 444             {
 445                 for (int x = 0; x < w; x++, bit_index++)
 446                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 447                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 448                 bit_index = (bit_index + 7) & ~7u;
 449             }
 450         }
 451         else
 452         {
 453             const wxByte r_mask = image.GetMaskRed();
 454             const wxByte g_mask = image.GetMaskGreen();
 455             const wxByte b_mask = image.GetMaskBlue();
 456             const wxByte* in = image.GetData();
 457             for (int y = 0; y < h; y++)
 458             {
 459                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 460                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 461                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 462                 bit_index = (bit_index + 7) & ~7u;
 463             }
 464         }
 465         wxMask* mask = new wxMask;
 466         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 467         SetMask(mask);
 468         delete[] out;
 469     }
 470     return true;
 471 }
 472
 473 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 474 {
 475     wxASSERT(image.HasAlpha());
 476
 477     int width = image.GetWidth();
 478     int height = image.GetHeight();
 479
 480     Create(width, height, 32);
 481     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 482     if (!pixbuf)
 483         return false;
 484
 485     // Copy the data:
 486     const unsigned char* in = image.GetData();
 487     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 488     unsigned char *alpha = image.GetAlpha();
 489
 490     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 491
 492     for (int y = 0; y < height; y++, out += rowpad)
 493     {
 494         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 495         {
 496             out[0] = in[0];
 497             out[1] = in[1];
 498             out[2] = in[2];
 499             out[3] = *alpha;
 500         }
 501     }
 502
 503     return true;
 504 }
 505
 506 wxImage wxBitmap::ConvertToImage() const
 507 {
 508     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 509
 510     const int w = GetWidth();
 511     const int h = GetHeight();
 512     wxImage image(w, h, false);
 513     unsigned char *data = image.GetData();
 514
 515     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 516
 517     // prefer pixbuf if available, it will preserve alpha and should be quicker
 518     if (HasPixbuf())
 519     {
 520         GdkPixbuf *pixbuf = GetPixbuf();
 521         unsigned char* alpha = NULL;
 522         if (gdk_pixbuf_get_has_alpha(pixbuf))
 523         {
 524             image.SetAlpha();
 525             alpha = image.GetAlpha();
 526         }
 527         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 528         unsigned char *out = data;
 529         const int inc = 3 + int(alpha != NULL);
 530         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 531
 532         for (int y = 0; y < h; y++, in += rowpad)
 533         {
 534             for (int x = 0; x < w; x++, in += inc, out += 3)
 535             {
 536                 out[0] = in[0];
 537                 out[1] = in[1];
 538                 out[2] = in[2];
 539                 if (alpha != NULL)
 540                     *alpha++ = in[3];
 541             }
 542         }
 543     }
 544     else
 545     {
 546         GdkPixmap* pixmap = GetPixmap();
 547         GdkPixmap* pixmap_invert = NULL;
 548         if (GetDepth() == 1)
 549         {
 550             // mono bitmaps are inverted, i.e. 0 is white
 551             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 552             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 553             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 554             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 555             pixmap = pixmap_invert;
 556         }
 557         // create a pixbuf which shares data with the wxImage
 558         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 559             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 560
 561         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 562
 563         g_object_unref(pixbuf);
 564         if (pixmap_invert != NULL)
 565             g_object_unref(pixmap_invert);
 566     }
 567     // convert mask, unless there is already alpha
 568     if (GetMask() && !image.HasAlpha())
 569     {
 570         // we hard code the mask colour for now but we could also make an
 571         // effort (and waste time) to choose a colour not present in the
 572         // image already to avoid having to fudge the pixels below --
 573         // whether it's worth to do it is unclear however
 574         const int MASK_RED = 1;
 575         const int MASK_GREEN = 2;
 576         const int MASK_BLUE = 3;
 577         const int MASK_BLUE_REPLACEMENT = 2;
 578
 579         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 580         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 581
 582         for (int y = 0; y < h; y++)
 583         {
 584             for (int x = 0; x < w; x++, data += 3)
 585             {
 586                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 587                 {
 588                     data[0] = MASK_RED;
 589                     data[1] = MASK_GREEN;
 590                     data[2] = MASK_BLUE;
 591                 }
 592                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 593                 {
 594                     // we have to fudge the colour a bit to prevent
 595                     // this pixel from appearing transparent
 596                     data[2] = MASK_BLUE_REPLACEMENT;
 597                 }
 598             }
 599         }
 600         g_object_unref(image_mask);
 601     }
 602
 603     return image;
 604 }
 605
 606 #endif // wxUSE_IMAGE
 607
 608 int wxBitmap::GetHeight() const
 609 {
 610     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 611
 612     return M_BMPDATA->m_height;
 613 }
 614
 615 int wxBitmap::GetWidth() const
 616 {
 617     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 618
 619     return M_BMPDATA->m_width;
 620 }
 621
 622 int wxBitmap::GetDepth() const
 623 {
 624     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 625
 626     return M_BMPDATA->m_bpp;
 627 }
 628
 629 wxMask *wxBitmap::GetMask() const
 630 {
 631     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 632
 633     return M_BMPDATA->m_mask;
 634 }
 635
 636 void wxBitmap::SetMask( wxMask *mask )
 637 {
 638     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 639
 640     AllocExclusive();
 641     delete M_BMPDATA->m_mask;
 642     M_BMPDATA->m_mask = mask;
 643 }
 644
 645 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 646 {
 647     *this = icon;
 648     return Ok();
 649 }
 650
 651 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 652 {
 653     wxBitmap ret;
 654
 655     wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
 656     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 657                 rect.x + rect.width <= M_BMPDATA->m_width &&
 658                 rect.y + rect.height <= M_BMPDATA->m_height,
 659                 ret, wxT("invalid bitmap region"));
 660
 661     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 662     {
 663         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 664                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 665                                            8, rect.width, rect.height);
 666         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 667         gdk_pixbuf_copy_area(GetPixbuf(),
 668                              rect.x, rect.y, rect.width, rect.height,
 669                              pixbuf, 0, 0);
 670     }
 671     else
 672     {
 673         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 674         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 675         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 676     }
 677     // make mask, unless there is already alpha
 678     if (GetMask() && !HasAlpha())
 679     {
 680         wxMask *mask = new wxMask;
 681         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 682
 683         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 684         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 685
 686         ret.SetMask( mask );
 687     }
 688
 689     return ret;
 690 }
 691
 692 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 693 {
 694     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 695
 696 #if wxUSE_IMAGE
 697     // Try to save the bitmap via wxImage handlers:
 698     wxImage image = ConvertToImage();
 699     return image.Ok() && image.SaveFile(name, type);
 700 #else // !wxUSE_IMAGE
 701     wxUnusedVar(name);
 702     wxUnusedVar(type);
 703
 704     return false;
 705 #endif // wxUSE_IMAGE
 706 }
 707
 708 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 709 {
 710     UnRef();
 711
 712     if (type == wxBITMAP_TYPE_XPM)
 713     {
 714         GdkBitmap *mask = (GdkBitmap*) NULL;
 715         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 716
 717         if (mask)
 718         {
 719             M_BMPDATA->m_mask = new wxMask;
 720             M_BMPDATA->m_mask->m_bitmap = mask;
 721         }
 722     }
 723 #if wxUSE_IMAGE
 724     else // try if wxImage can load it
 725     {
 726         wxImage image;
 727         if (image.LoadFile(name, type) && image.Ok())
 728             CreateFromImage(image, -1);
 729     }
 730 #endif // wxUSE_IMAGE
 731
 732     return Ok();
 733 }
 734
 735 #if wxUSE_PALETTE
 736 wxPalette *wxBitmap::GetPalette() const
 737 {
 738     wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 739
 740     return M_BMPDATA->m_palette;
 741 }
 742
 743 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 744 {
 745     // TODO
 746 }
 747 #endif // wxUSE_PALETTE
 748
 749 void wxBitmap::SetHeight( int height )
 750 {
 751     AllocExclusive();
 752     M_BMPDATA->m_height = height;
 753 }
 754
 755 void wxBitmap::SetWidth( int width )
 756 {
 757     AllocExclusive();
 758     M_BMPDATA->m_width = width;
 759 }
 760
 761 void wxBitmap::SetDepth( int depth )
 762 {
 763     AllocExclusive();
 764     M_BMPDATA->m_bpp = depth;
 765 }
 766
 767 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 768 {
 769     if (!m_refData)
 770         m_refData = new wxBitmapRefData;
 771
 772     // AllocExclusive should not be needed for this internal function
 773     wxASSERT(m_refData->GetRefCount() == 1);
 774     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 775     M_BMPDATA->m_pixmap = pixmap;
 776     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 777     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 778     PurgeOtherRepresentations(Pixmap);
 779 }
 780
 781 GdkPixmap *wxBitmap::GetPixmap() const
 782 {
 783     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 784
 785     // create the pixmap on the fly if we use Pixbuf representation:
 786     if (M_BMPDATA->m_pixmap == NULL)
 787     {
 788         GdkPixmap** pmask = NULL;
 789         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 790         {
 791             // make new mask from alpha
 792             delete M_BMPDATA->m_mask;
 793             M_BMPDATA->m_mask = new wxMask;
 794             pmask = &M_BMPDATA->m_mask->m_bitmap;
 795         }
 796         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 797                                           &M_BMPDATA->m_pixmap,
 798                                           pmask,
 799                                           0x80 /* alpha threshold */);
 800     }
 801
 802     return M_BMPDATA->m_pixmap;
 803 }
 804
 805 bool wxBitmap::HasPixmap() const
 806 {
 807     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 808
 809     return M_BMPDATA->m_pixmap != NULL;
 810 }
 811
 812 GdkPixbuf *wxBitmap::GetPixbuf() const
 813 {
 814     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 815
 816     if (M_BMPDATA->m_pixbuf == NULL)
 817     {
 818
 819         int width = GetWidth();
 820         int height = GetHeight();
 821
 822         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 823                                            GetMask() != NULL,
 824                                            8, width, height);
 825         M_BMPDATA->m_pixbuf = pixbuf;
 826         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 827                                      0, 0, 0, 0, width, height);
 828         // apply the mask to created pixbuf:
 829         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 830         {
 831             GdkPixbuf *pmask =
 832                 gdk_pixbuf_get_from_drawable(NULL,
 833                                              M_BMPDATA->m_mask->GetBitmap(),
 834                                              NULL,
 835                                              0, 0, 0, 0, width, height);
 836             if (pmask)
 837             {
 838                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 839                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 840                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 841                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 842
 843                 for (int y = 0; y < height;
 844                      y++, bmp += bmprowinc, mask += maskrowinc)
 845                 {
 846                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 847                     {
 848                         if (mask[0] == 0 /*black pixel*/)
 849                             bmp[3] = 0;
 850                     }
 851                 }
 852
 853                 g_object_unref (pmask);
 854             }
 855         }
 856     }
 857
 858     return M_BMPDATA->m_pixbuf;
 859 }
 860
 861 bool wxBitmap::HasPixbuf() const
 862 {
 863     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 864
 865     return M_BMPDATA->m_pixbuf != NULL;
 866 }
 867
 868 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 869 {
 870     if (!m_refData)
 871         m_refData = new wxBitmapRefData;
 872
 873     // AllocExclusive should not be needed for this internal function
 874     wxASSERT(m_refData->GetRefCount() == 1);
 875     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 876     M_BMPDATA->m_pixbuf = pixbuf;
 877     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 878     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 879     // if depth specified
 880     if (depth != 0)
 881         M_BMPDATA->m_bpp = depth;
 882     else if (M_BMPDATA->m_bpp == 0)
 883         // use something reasonable
 884         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 885     PurgeOtherRepresentations(Pixbuf);
 886 }
 887
 888 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 889 {
 890     if (keep == Pixmap && HasPixbuf())
 891     {
 892         g_object_unref (M_BMPDATA->m_pixbuf);
 893         M_BMPDATA->m_pixbuf = NULL;
 894     }
 895     if (keep == Pixbuf && HasPixmap())
 896     {
 897         g_object_unref (M_BMPDATA->m_pixmap);
 898         M_BMPDATA->m_pixmap = NULL;
 899     }
 900 }
 901
 902 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 903 {
 904     void* bits = NULL;
 905     GdkPixbuf *pixbuf = GetPixbuf();
 906     const bool hasAlpha = HasAlpha();
 907
 908     // allow access if bpp is valid and matches existence of alpha
 909     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 910     {
 911         data.m_height = gdk_pixbuf_get_height( pixbuf );
 912         data.m_width = gdk_pixbuf_get_width( pixbuf );
 913         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 914         bits = gdk_pixbuf_get_pixels(pixbuf);
 915     }
 916     return bits;
 917 }
 918
 919 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 920 {
 921 }
 922
 923 bool wxBitmap::HasAlpha() const
 924 {
 925     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 926         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 927 }
 928
 929 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 930 {
 931     return new wxBitmapRefData;
 932 }
 933
 934 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 935 {
 936     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 937     wxBitmapRefData* newRef = new wxBitmapRefData;
 938     newRef->m_width = oldRef->m_width;
 939     newRef->m_height = oldRef->m_height;
 940     newRef->m_bpp = oldRef->m_bpp;
 941     if (oldRef->m_pixmap != NULL)
 942     {
 943         newRef->m_pixmap = gdk_pixmap_new(
 944             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 945             // use pixmap depth, m_bpp may not match
 946             gdk_drawable_get_depth(oldRef->m_pixmap));
 947         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 948         gdk_draw_drawable(
 949             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 950     }
 951     if (oldRef->m_pixbuf != NULL)
 952     {
 953         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 954     }
 955     if (oldRef->m_mask != NULL)
 956     {
 957         newRef->m_mask = new wxMask;
 958         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 959             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 960         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 961         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 962             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 963     }
 964 #if wxUSE_PALETTE
 965     // implement this if SetPalette is ever implemented
 966     wxASSERT(oldRef->m_palette == NULL);
 967 #endif
 968
 969     return newRef;
 970 }
 971
 972 /* static */ void wxBitmap::InitStandardHandlers()
 973 {
 974     // TODO: Insert handler based on GdkPixbufs handler later
 975 }