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,
 304                            int width, int height) const
 305 {
 306     wxBitmap bmp;
 307
 308     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 309
 310     width = wxMax(width, 1);
 311     height = wxMax(height, 1);
 312
 313     const double scale_x = double(width) / clipwidth;
 314     const double scale_y = double(height) / clipheight;
 315
 316     // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
 317     // back, is faster than scaling pixmap ourselves.
 318
 319     // use pixbuf if already available,
 320     // otherwise create temporary pixbuf from pixmap
 321     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 322     if (pixbuf)
 323         g_object_ref(pixbuf);
 324     else
 325         pixbuf = gdk_pixbuf_get_from_drawable(
 326             NULL, M_BMPDATA->m_pixmap, NULL,
 327             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 328
 329     // new pixbuf for scaled wxBitmap
 330     GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
 331         GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
 332
 333     // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
 334     // images, but the only one which preserves sharp edges
 335     gdk_pixbuf_scale(
 336         pixbuf, pixbuf_scaled,
 337         0, 0, width, height, -clipx*scale_x, -clipy*scale_y, scale_x, scale_y,
 338         GDK_INTERP_NEAREST);
 339
 340     g_object_unref(pixbuf);
 341     bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
 342
 343     if (M_BMPDATA->m_mask)
 344     {
 345         pixbuf = gdk_pixbuf_get_from_drawable(
 346             NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
 347             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 348
 349         pixbuf_scaled = gdk_pixbuf_new(
 350             GDK_COLORSPACE_RGB, false, 8, width, height);
 351
 352         gdk_pixbuf_scale(
 353             pixbuf, pixbuf_scaled,
 354             0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
 355             GDK_INTERP_NEAREST);
 356
 357         g_object_unref(pixbuf);
 358
 359         // use existing functionality to create mask from scaled pixbuf
 360         wxBitmap maskbmp;
 361         maskbmp.SetPixbuf(pixbuf_scaled);
 362         bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
 363     }
 364     return bmp;
 365 }
 366
 367 #if wxUSE_IMAGE
 368
 369 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 370 {
 371     UnRef();
 372
 373     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 374     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 375
 376     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 377         return false;
 378
 379     // create pixbuf if image has alpha and requested depth is compatible
 380     if (image.HasAlpha() && (depth == -1 || depth == 32))
 381         return CreateFromImageAsPixbuf(image);
 382
 383     // otherwise create pixmap, if alpha is present it will be converted to mask
 384     return CreateFromImageAsPixmap(image, depth);
 385 }
 386
 387 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 388 {
 389     const int w = image.GetWidth();
 390     const int h = image.GetHeight();
 391     if (depth == 1)
 392     {
 393         // create XBM format bitmap
 394
 395         // one bit per pixel, each row starts on a byte boundary
 396         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 397         wxByte* out = new wxByte[out_size];
 398         // set bits are black
 399         memset(out, 0xff, out_size);
 400         const wxByte* in = image.GetData();
 401         unsigned bit_index = 0;
 402         for (int y = 0; y < h; y++)
 403         {
 404             for (int x = 0; x < w; x++, in += 3, bit_index++)
 405                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 406                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 407             // move index to next byte boundary
 408             bit_index = (bit_index + 7) & ~7u;
 409         }
 410         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 411         delete[] out;
 412     }
 413     else
 414     {
 415         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 416         GdkGC* gc = gdk_gc_new(M_BMPDATA->m_pixmap);
 417         gdk_draw_rgb_image(
 418             M_BMPDATA->m_pixmap, gc,
 419             0, 0, w, h,
 420             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 421         g_object_unref(gc);
 422     }
 423
 424     const wxByte* alpha = image.GetAlpha();
 425     if (alpha != NULL || image.HasMask())
 426     {
 427         // create mask as XBM format bitmap
 428
 429         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 430         wxByte* out = new wxByte[out_size];
 431         memset(out, 0xff, out_size);
 432         unsigned bit_index = 0;
 433         if (alpha != NULL)
 434         {
 435             for (int y = 0; y < h; y++)
 436             {
 437                 for (int x = 0; x < w; x++, bit_index++)
 438                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 439                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 440                 bit_index = (bit_index + 7) & ~7u;
 441             }
 442         }
 443         else
 444         {
 445             const wxByte r_mask = image.GetMaskRed();
 446             const wxByte g_mask = image.GetMaskGreen();
 447             const wxByte b_mask = image.GetMaskBlue();
 448             const wxByte* in = image.GetData();
 449             for (int y = 0; y < h; y++)
 450             {
 451                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 452                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 453                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 454                 bit_index = (bit_index + 7) & ~7u;
 455             }
 456         }
 457         wxMask* mask = new wxMask;
 458         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 459         SetMask(mask);
 460         delete[] out;
 461     }
 462     return true;
 463 }
 464
 465 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 466 {
 467     wxASSERT(image.HasAlpha());
 468
 469     int width = image.GetWidth();
 470     int height = image.GetHeight();
 471
 472     Create(width, height, 32);
 473     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 474     if (!pixbuf)
 475         return false;
 476
 477     // Copy the data:
 478     const unsigned char* in = image.GetData();
 479     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 480     unsigned char *alpha = image.GetAlpha();
 481
 482     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 483
 484     for (int y = 0; y < height; y++, out += rowpad)
 485     {
 486         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 487         {
 488             out[0] = in[0];
 489             out[1] = in[1];
 490             out[2] = in[2];
 491             out[3] = *alpha;
 492         }
 493     }
 494
 495     return true;
 496 }
 497
 498 wxImage wxBitmap::ConvertToImage() const
 499 {
 500     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 501
 502     const int w = GetWidth();
 503     const int h = GetHeight();
 504     wxImage image(w, h, false);
 505     unsigned char *data = image.GetData();
 506
 507     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 508
 509     // prefer pixbuf if available, it will preserve alpha and should be quicker
 510     if (HasPixbuf())
 511     {
 512         GdkPixbuf *pixbuf = GetPixbuf();
 513         unsigned char* alpha = NULL;
 514         if (gdk_pixbuf_get_has_alpha(pixbuf))
 515         {
 516             image.SetAlpha();
 517             alpha = image.GetAlpha();
 518         }
 519         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 520         unsigned char *out = data;
 521         const int inc = 3 + int(alpha != NULL);
 522         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 523
 524         for (int y = 0; y < h; y++, in += rowpad)
 525         {
 526             for (int x = 0; x < w; x++, in += inc, out += 3)
 527             {
 528                 out[0] = in[0];
 529                 out[1] = in[1];
 530                 out[2] = in[2];
 531                 if (alpha != NULL)
 532                     *alpha++ = in[3];
 533             }
 534         }
 535     }
 536     else
 537     {
 538         GdkPixmap* pixmap = GetPixmap();
 539         GdkPixmap* pixmap_invert = NULL;
 540         if (GetDepth() == 1)
 541         {
 542             // mono bitmaps are inverted, i.e. 0 is white
 543             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 544             GdkGC* gc = gdk_gc_new(pixmap_invert);
 545             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 546             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 547             g_object_unref(gc);
 548             pixmap = pixmap_invert;
 549         }
 550         // create a pixbuf which shares data with the wxImage
 551         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 552             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 553
 554         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 555
 556         g_object_unref(pixbuf);
 557         if (pixmap_invert != NULL)
 558             g_object_unref(pixmap_invert);
 559     }
 560     // convert mask, unless there is already alpha
 561     if (GetMask() && !image.HasAlpha())
 562     {
 563         // we hard code the mask colour for now but we could also make an
 564         // effort (and waste time) to choose a colour not present in the
 565         // image already to avoid having to fudge the pixels below --
 566         // whether it's worth to do it is unclear however
 567         const int MASK_RED = 1;
 568         const int MASK_GREEN = 2;
 569         const int MASK_BLUE = 3;
 570         const int MASK_BLUE_REPLACEMENT = 2;
 571
 572         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 573         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 574
 575         for (int y = 0; y < h; y++)
 576         {
 577             for (int x = 0; x < w; x++, data += 3)
 578             {
 579                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 580                 {
 581                     data[0] = MASK_RED;
 582                     data[1] = MASK_GREEN;
 583                     data[2] = MASK_BLUE;
 584                 }
 585                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 586                 {
 587                     // we have to fudge the colour a bit to prevent
 588                     // this pixel from appearing transparent
 589                     data[2] = MASK_BLUE_REPLACEMENT;
 590                 }
 591             }
 592         }
 593         g_object_unref(image_mask);
 594     }
 595
 596     return image;
 597 }
 598
 599 #endif // wxUSE_IMAGE
 600
 601 int wxBitmap::GetHeight() const
 602 {
 603     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 604
 605     return M_BMPDATA->m_height;
 606 }
 607
 608 int wxBitmap::GetWidth() const
 609 {
 610     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 611
 612     return M_BMPDATA->m_width;
 613 }
 614
 615 int wxBitmap::GetDepth() const
 616 {
 617     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 618
 619     return M_BMPDATA->m_bpp;
 620 }
 621
 622 wxMask *wxBitmap::GetMask() const
 623 {
 624     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 625
 626     return M_BMPDATA->m_mask;
 627 }
 628
 629 void wxBitmap::SetMask( wxMask *mask )
 630 {
 631     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 632
 633     AllocExclusive();
 634     delete M_BMPDATA->m_mask;
 635     M_BMPDATA->m_mask = mask;
 636 }
 637
 638 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 639 {
 640     *this = icon;
 641     return Ok();
 642 }
 643
 644 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 645 {
 646     wxBitmap ret;
 647
 648     wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
 649     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 650                 rect.x + rect.width <= M_BMPDATA->m_width &&
 651                 rect.y + rect.height <= M_BMPDATA->m_height,
 652                 ret, wxT("invalid bitmap region"));
 653
 654     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 655     {
 656         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 657                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 658                                            8, rect.width, rect.height);
 659         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 660         gdk_pixbuf_copy_area(GetPixbuf(),
 661                              rect.x, rect.y, rect.width, rect.height,
 662                              pixbuf, 0, 0);
 663     }
 664     else
 665     {
 666         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 667         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 668         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 669         g_object_unref (gc);
 670     }
 671     // make mask, unless there is already alpha
 672     if (GetMask() && !HasAlpha())
 673     {
 674         wxMask *mask = new wxMask;
 675         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 676
 677         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 678         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 679         g_object_unref (gc);
 680
 681         ret.SetMask( mask );
 682     }
 683
 684     return ret;
 685 }
 686
 687 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 688 {
 689     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 690
 691 #if wxUSE_IMAGE
 692     // Try to save the bitmap via wxImage handlers:
 693     wxImage image = ConvertToImage();
 694     return image.Ok() && image.SaveFile(name, type);
 695 #else // !wxUSE_IMAGE
 696     wxUnusedVar(name);
 697     wxUnusedVar(type);
 698
 699     return false;
 700 #endif // wxUSE_IMAGE
 701 }
 702
 703 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 704 {
 705     UnRef();
 706
 707     if (type == wxBITMAP_TYPE_XPM)
 708     {
 709         GdkBitmap *mask = (GdkBitmap*) NULL;
 710         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 711
 712         if (mask)
 713         {
 714             M_BMPDATA->m_mask = new wxMask;
 715             M_BMPDATA->m_mask->m_bitmap = mask;
 716         }
 717     }
 718 #if wxUSE_IMAGE
 719     else // try if wxImage can load it
 720     {
 721         wxImage image;
 722         if (image.LoadFile(name, type) && image.Ok())
 723             CreateFromImage(image, -1);
 724     }
 725 #endif // wxUSE_IMAGE
 726
 727     return Ok();
 728 }
 729
 730 #if wxUSE_PALETTE
 731 wxPalette *wxBitmap::GetPalette() const
 732 {
 733     wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 734
 735     return M_BMPDATA->m_palette;
 736 }
 737
 738 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 739 {
 740     // TODO
 741 }
 742 #endif // wxUSE_PALETTE
 743
 744 void wxBitmap::SetHeight( int height )
 745 {
 746     AllocExclusive();
 747     M_BMPDATA->m_height = height;
 748 }
 749
 750 void wxBitmap::SetWidth( int width )
 751 {
 752     AllocExclusive();
 753     M_BMPDATA->m_width = width;
 754 }
 755
 756 void wxBitmap::SetDepth( int depth )
 757 {
 758     AllocExclusive();
 759     M_BMPDATA->m_bpp = depth;
 760 }
 761
 762 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 763 {
 764     if (!m_refData)
 765         m_refData = new wxBitmapRefData;
 766
 767     // AllocExclusive should not be needed for this internal function
 768     wxASSERT(m_refData->GetRefCount() == 1);
 769     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 770     M_BMPDATA->m_pixmap = pixmap;
 771     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 772     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 773     PurgeOtherRepresentations(Pixmap);
 774 }
 775
 776 GdkPixmap *wxBitmap::GetPixmap() const
 777 {
 778     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 779
 780     // create the pixmap on the fly if we use Pixbuf representation:
 781     if (M_BMPDATA->m_pixmap == NULL)
 782     {
 783         GdkPixmap** pmask = NULL;
 784         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 785         {
 786             // make new mask from alpha
 787             delete M_BMPDATA->m_mask;
 788             M_BMPDATA->m_mask = new wxMask;
 789             pmask = &M_BMPDATA->m_mask->m_bitmap;
 790         }
 791         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 792                                           &M_BMPDATA->m_pixmap,
 793                                           pmask,
 794                                           0x80 /* alpha threshold */);
 795     }
 796
 797     return M_BMPDATA->m_pixmap;
 798 }
 799
 800 bool wxBitmap::HasPixmap() const
 801 {
 802     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 803
 804     return M_BMPDATA->m_pixmap != NULL;
 805 }
 806
 807 GdkPixbuf *wxBitmap::GetPixbuf() const
 808 {
 809     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 810
 811     if (M_BMPDATA->m_pixbuf == NULL)
 812     {
 813         int width = GetWidth();
 814         int height = GetHeight();
 815
 816         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 817                                            GetMask() != NULL,
 818                                            8, width, height);
 819         M_BMPDATA->m_pixbuf = pixbuf;
 820         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 821                                      0, 0, 0, 0, width, height);
 822
 823         // apply the mask to created pixbuf:
 824         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 825         {
 826             GdkPixbuf *pmask =
 827                 gdk_pixbuf_get_from_drawable(NULL,
 828                                              M_BMPDATA->m_mask->GetBitmap(),
 829                                              NULL,
 830                                              0, 0, 0, 0, width, height);
 831             if (pmask)
 832             {
 833                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 834                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 835                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 836                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 837
 838                 for (int y = 0; y < height;
 839                      y++, bmp += bmprowinc, mask += maskrowinc)
 840                 {
 841                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 842                     {
 843                         if (mask[0] == 0 /*black pixel*/)
 844                             bmp[3] = 0;
 845                     }
 846                 }
 847
 848                 g_object_unref (pmask);
 849             }
 850         }
 851     }
 852
 853     return M_BMPDATA->m_pixbuf;
 854 }
 855
 856 bool wxBitmap::HasPixbuf() const
 857 {
 858     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 859
 860     return M_BMPDATA->m_pixbuf != NULL;
 861 }
 862
 863 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 864 {
 865     if (!m_refData)
 866         m_refData = new wxBitmapRefData;
 867
 868     // AllocExclusive should not be needed for this internal function
 869     wxASSERT(m_refData->GetRefCount() == 1);
 870     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 871     M_BMPDATA->m_pixbuf = pixbuf;
 872     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 873     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 874     // if depth specified
 875     if (depth != 0)
 876         M_BMPDATA->m_bpp = depth;
 877     else if (M_BMPDATA->m_bpp == 0)
 878         // use something reasonable
 879         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 880     PurgeOtherRepresentations(Pixbuf);
 881 }
 882
 883 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 884 {
 885     if (keep == Pixmap && HasPixbuf())
 886     {
 887         g_object_unref (M_BMPDATA->m_pixbuf);
 888         M_BMPDATA->m_pixbuf = NULL;
 889     }
 890     if (keep == Pixbuf && HasPixmap())
 891     {
 892         g_object_unref (M_BMPDATA->m_pixmap);
 893         M_BMPDATA->m_pixmap = NULL;
 894     }
 895 }
 896
 897 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 898 {
 899     void* bits = NULL;
 900     GdkPixbuf *pixbuf = GetPixbuf();
 901     const bool hasAlpha = HasAlpha();
 902     // allow access if bpp is valid and matches existence of alpha
 903     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 904     {
 905         data.m_height = gdk_pixbuf_get_height( pixbuf );
 906         data.m_width = gdk_pixbuf_get_width( pixbuf );
 907         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 908         bits = gdk_pixbuf_get_pixels(pixbuf);
 909     }
 910     return bits;
 911 }
 912
 913 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 914 {
 915 }
 916
 917 bool wxBitmap::HasAlpha() const
 918 {
 919     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 920         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 921 }
 922
 923 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 924 {
 925     return new wxBitmapRefData;
 926 }
 927
 928 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 929 {
 930     const wxBitmapRefData* oldRef = wx_static_cast(const wxBitmapRefData*, data);
 931     wxBitmapRefData* newRef = new wxBitmapRefData;
 932     newRef->m_width = oldRef->m_width;
 933     newRef->m_height = oldRef->m_height;
 934     newRef->m_bpp = oldRef->m_bpp;
 935     if (oldRef->m_pixmap != NULL)
 936     {
 937         newRef->m_pixmap = gdk_pixmap_new(
 938             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 939             // use pixmap depth, m_bpp may not match
 940             gdk_drawable_get_depth(oldRef->m_pixmap));
 941         GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
 942         gdk_draw_drawable(
 943             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 944         g_object_unref(gc);
 945     }
 946     if (oldRef->m_pixbuf != NULL)
 947     {
 948         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 949     }
 950     if (oldRef->m_mask != NULL)
 951     {
 952         newRef->m_mask = new wxMask;
 953         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 954             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 955         GdkGC* gc = gdk_gc_new(newRef->m_mask->m_bitmap);
 956         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 957             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 958         g_object_unref(gc);
 959     }
 960 #if wxUSE_PALETTE
 961     // implement this if SetPalette is ever implemented
 962     wxASSERT(oldRef->m_palette == NULL);
 963 #endif
 964
 965     return newRef;
 966 }
 967
 968 /* static */ void wxBitmap::InitStandardHandlers()
 969 {
 970     // TODO: Insert handler based on GdkPixbufs handler later
 971 }