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 wxObjectRefData
 185 {
 186 public:
 187     wxBitmapRefData();
 188     virtual ~wxBitmapRefData();
 189
 190     GdkPixmap      *m_pixmap;
 191     GdkPixbuf      *m_pixbuf;
 192     wxMask         *m_mask;
 193     int             m_width;
 194     int             m_height;
 195     int             m_bpp;
 196 #if wxUSE_PALETTE
 197     wxPalette      *m_palette;
 198 #endif // wxUSE_PALETTE
 199 };
 200
 201 wxBitmapRefData::wxBitmapRefData()
 202 {
 203     m_pixmap = (GdkPixmap *) NULL;
 204     m_pixbuf = (GdkPixbuf *) NULL;
 205     m_mask = (wxMask *) NULL;
 206     m_width = 0;
 207     m_height = 0;
 208     m_bpp = 0;
 209 #if wxUSE_PALETTE
 210     m_palette = (wxPalette *) NULL;
 211 #endif // wxUSE_PALETTE
 212 }
 213
 214 wxBitmapRefData::~wxBitmapRefData()
 215 {
 216     if (m_pixmap)
 217         g_object_unref (m_pixmap);
 218     if (m_pixbuf)
 219         g_object_unref (m_pixbuf);
 220     delete m_mask;
 221 #if wxUSE_PALETTE
 222     delete m_palette;
 223 #endif // wxUSE_PALETTE
 224 }
 225
 226 //-----------------------------------------------------------------------------
 227
 228 #define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 229
 230 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 231
 232 wxBitmap::wxBitmap(int width, int height, int depth)
 233 {
 234     Create(width, height, depth);
 235 }
 236
 237 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 238 {
 239     LoadFile(filename, type);
 240 }
 241
 242 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 243 {
 244     wxASSERT(depth == 1);
 245     if (width > 0 && height > 0 && depth == 1)
 246     {
 247         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 248
 249         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 250     }
 251 }
 252
 253 wxBitmap::wxBitmap(const char* const* bits)
 254 {
 255     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 256
 257     GdkBitmap* mask = NULL;
 258     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, wx_const_cast(char**, bits)));
 259
 260     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 261     {
 262         M_BMPDATA->m_mask = new wxMask;
 263         M_BMPDATA->m_mask->m_bitmap = mask;
 264     }
 265 }
 266
 267 wxBitmap::~wxBitmap()
 268 {
 269 }
 270
 271 bool wxBitmap::Create( int width, int height, int depth )
 272 {
 273     UnRef();
 274
 275     if ( width <= 0 || height <= 0 )
 276     {
 277         return false;
 278     }
 279
 280     if (depth == 32)
 281     {
 282         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 283     }
 284     else
 285     {
 286         if (depth != 1)
 287         {
 288             const GdkVisual* visual = wxTheApp->GetGdkVisual();
 289             if (depth == -1)
 290                 depth = visual->depth;
 291
 292             wxCHECK_MSG(depth == visual->depth, false, wxT("invalid bitmap depth"));
 293         }
 294
 295         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 296     }
 297
 298     return Ok();
 299 }
 300
 301 wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy) const
 302 {
 303     wxBitmap bmp;
 304
 305     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 306
 307     if (newx==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 308         return *this;
 309
 310     int width = wxMax(newx, 1);
 311     int height = wxMax(newy, 1);
 312     width = wxMin(width, clipwidth);
 313     height = wxMin(height, clipheight);
 314
 315     const double scale_x = double(newx) / M_BMPDATA->m_width;
 316     const double scale_y = double(newy) / M_BMPDATA->m_height;
 317
 318     // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
 319     // back, is faster than scaling pixmap ourselves.
 320
 321     // use pixbuf if already available,
 322     // otherwise create temporary pixbuf from pixmap
 323     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 324     if (pixbuf)
 325         g_object_ref(pixbuf);
 326     else
 327         pixbuf = gdk_pixbuf_get_from_drawable(
 328             NULL, M_BMPDATA->m_pixmap, NULL,
 329             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 330
 331     // new pixbuf for scaled wxBitmap
 332     GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
 333         GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
 334
 335     // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
 336     // images, but the only one which preserves sharp edges
 337     gdk_pixbuf_scale(
 338         pixbuf, pixbuf_scaled,
 339         0, 0, width, height, clipx, clipy, scale_x, scale_y,
 340         GDK_INTERP_NEAREST);
 341
 342     g_object_unref(pixbuf);
 343     bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
 344
 345     if (M_BMPDATA->m_mask)
 346     {
 347         pixbuf = gdk_pixbuf_get_from_drawable(
 348             NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
 349             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 350
 351         pixbuf_scaled = gdk_pixbuf_new(
 352             GDK_COLORSPACE_RGB, false, 8, width, height);
 353
 354         gdk_pixbuf_scale(
 355             pixbuf, pixbuf_scaled,
 356             0, 0, width, height, clipx, clipy, scale_x, scale_y,
 357             GDK_INTERP_NEAREST);
 358
 359         g_object_unref(pixbuf);
 360
 361         // use existing functionality to create mask from scaled pixbuf
 362         wxBitmap maskbmp;
 363         maskbmp.SetPixbuf(pixbuf_scaled);
 364         bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
 365     }
 366     return bmp;
 367 }
 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 bool wxBitmap::IsOk() const
 600 {
 601     return (m_refData != NULL) &&
 602            (
 603               M_BMPDATA->m_pixbuf ||
 604               M_BMPDATA->m_pixmap
 605            );
 606 }
 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         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         g_object_unref (gc);
 677     }
 678     // make mask, unless there is already alpha
 679     if (GetMask() && !HasAlpha())
 680     {
 681         wxMask *mask = new wxMask;
 682         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 683
 684         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 685         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 686         g_object_unref (gc);
 687
 688         ret.SetMask( mask );
 689     }
 690
 691     return ret;
 692 }
 693
 694 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 695 {
 696     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 697
 698     // Try to save the bitmap via wxImage handlers:
 699     wxImage image = ConvertToImage();
 700     return image.Ok() && image.SaveFile(name, type);
 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     else // try if wxImage can load it
 719     {
 720         wxImage image;
 721         if (image.LoadFile(name, type) && image.Ok())
 722             CreateFromImage(image, -1);
 723     }
 724
 725     return Ok();
 726 }
 727
 728 #if wxUSE_PALETTE
 729 wxPalette *wxBitmap::GetPalette() const
 730 {
 731     wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 732
 733     return M_BMPDATA->m_palette;
 734 }
 735
 736 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 737 {
 738     // TODO
 739 }
 740 #endif // wxUSE_PALETTE
 741
 742 void wxBitmap::SetHeight( int height )
 743 {
 744     AllocExclusive();
 745     M_BMPDATA->m_height = height;
 746 }
 747
 748 void wxBitmap::SetWidth( int width )
 749 {
 750     AllocExclusive();
 751     M_BMPDATA->m_width = width;
 752 }
 753
 754 void wxBitmap::SetDepth( int depth )
 755 {
 756     AllocExclusive();
 757     M_BMPDATA->m_bpp = depth;
 758 }
 759
 760 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 761 {
 762     if (!m_refData)
 763         m_refData = new wxBitmapRefData;
 764
 765     // AllocExclusive should not be needed for this internal function
 766     wxASSERT(m_refData->GetRefCount() == 1);
 767     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 768     M_BMPDATA->m_pixmap = pixmap;
 769     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 770     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 771     PurgeOtherRepresentations(Pixmap);
 772 }
 773
 774 GdkPixmap *wxBitmap::GetPixmap() const
 775 {
 776     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 777
 778     // create the pixmap on the fly if we use Pixbuf representation:
 779     if (M_BMPDATA->m_pixmap == NULL)
 780     {
 781         GdkPixmap** pmask = NULL;
 782         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 783         {
 784             // make new mask from alpha
 785             delete M_BMPDATA->m_mask;
 786             M_BMPDATA->m_mask = new wxMask;
 787             pmask = &M_BMPDATA->m_mask->m_bitmap;
 788         }
 789         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 790                                           &M_BMPDATA->m_pixmap,
 791                                           pmask,
 792                                           wxIMAGE_ALPHA_THRESHOLD);
 793     }
 794
 795     return M_BMPDATA->m_pixmap;
 796 }
 797
 798 bool wxBitmap::HasPixmap() const
 799 {
 800     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 801
 802     return M_BMPDATA->m_pixmap != NULL;
 803 }
 804
 805 GdkPixbuf *wxBitmap::GetPixbuf() const
 806 {
 807     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 808
 809     if (M_BMPDATA->m_pixbuf == NULL)
 810     {
 811         int width = GetWidth();
 812         int height = GetHeight();
 813
 814         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 815                                            GetMask() != NULL,
 816                                            8, width, height);
 817         M_BMPDATA->m_pixbuf = pixbuf;
 818         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 819                                      0, 0, 0, 0, width, height);
 820
 821         // apply the mask to created pixbuf:
 822         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 823         {
 824             GdkPixbuf *pmask =
 825                 gdk_pixbuf_get_from_drawable(NULL,
 826                                              M_BMPDATA->m_mask->GetBitmap(),
 827                                              NULL,
 828                                              0, 0, 0, 0, width, height);
 829             if (pmask)
 830             {
 831                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 832                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 833                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 834                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 835
 836                 for (int y = 0; y < height;
 837                      y++, bmp += bmprowinc, mask += maskrowinc)
 838                 {
 839                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 840                     {
 841                         if (mask[0] == 0 /*black pixel*/)
 842                             bmp[3] = 0;
 843                     }
 844                 }
 845
 846                 g_object_unref (pmask);
 847             }
 848         }
 849     }
 850
 851     return M_BMPDATA->m_pixbuf;
 852 }
 853
 854 bool wxBitmap::HasPixbuf() const
 855 {
 856     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 857
 858     return M_BMPDATA->m_pixbuf != NULL;
 859 }
 860
 861 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 862 {
 863     if (!m_refData)
 864         m_refData = new wxBitmapRefData;
 865
 866     // AllocExclusive should not be needed for this internal function
 867     wxASSERT(m_refData->GetRefCount() == 1);
 868     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 869     M_BMPDATA->m_pixbuf = pixbuf;
 870     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 871     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 872     // if depth specified
 873     if (depth != 0)
 874         M_BMPDATA->m_bpp = depth;
 875     else if (M_BMPDATA->m_bpp == 0)
 876         // use something reasonable
 877         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 878     PurgeOtherRepresentations(Pixbuf);
 879 }
 880
 881 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 882 {
 883     if (keep == Pixmap && HasPixbuf())
 884     {
 885         g_object_unref (M_BMPDATA->m_pixbuf);
 886         M_BMPDATA->m_pixbuf = NULL;
 887     }
 888     if (keep == Pixbuf && HasPixmap())
 889     {
 890         g_object_unref (M_BMPDATA->m_pixmap);
 891         M_BMPDATA->m_pixmap = NULL;
 892     }
 893 }
 894
 895 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 896 {
 897     void* bits = NULL;
 898     GdkPixbuf *pixbuf = GetPixbuf();
 899     const bool hasAlpha = HasAlpha();
 900     // allow access if bpp is valid and matches existence of alpha
 901     if (pixbuf != NULL && (
 902         bpp == 24 && !hasAlpha ||
 903         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 void wxBitmap::UseAlpha()
 924 {
 925     GdkPixbuf* pixbuf = GetPixbuf();
 926     // add alpha if necessary
 927     if (!gdk_pixbuf_get_has_alpha(pixbuf))
 928     {
 929         M_BMPDATA->m_pixbuf = NULL;
 930         AllocExclusive();
 931         M_BMPDATA->m_pixbuf = gdk_pixbuf_add_alpha(pixbuf, false, 0, 0, 0);
 932         g_object_unref(pixbuf);
 933     }
 934 }
 935
 936 wxObjectRefData* wxBitmap::CreateRefData() const
 937 {
 938     return new wxBitmapRefData;
 939 }
 940
 941 wxObjectRefData* wxBitmap::CloneRefData(const wxObjectRefData* data) const
 942 {
 943     const wxBitmapRefData* oldRef = wx_static_cast(const wxBitmapRefData*, data);
 944     wxBitmapRefData* newRef = new wxBitmapRefData;
 945     newRef->m_width = oldRef->m_width;
 946     newRef->m_height = oldRef->m_height;
 947     newRef->m_bpp = oldRef->m_bpp;
 948     if (oldRef->m_pixmap != NULL)
 949     {
 950         newRef->m_pixmap = gdk_pixmap_new(
 951             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 952             // use pixmap depth, m_bpp may not match
 953             gdk_drawable_get_depth(oldRef->m_pixmap));
 954         GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
 955         gdk_draw_drawable(
 956             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 957         g_object_unref(gc);
 958     }
 959     if (oldRef->m_pixbuf != NULL)
 960     {
 961         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 962     }
 963     if (oldRef->m_mask != NULL)
 964     {
 965         newRef->m_mask = new wxMask;
 966         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 967             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 968         GdkGC* gc = gdk_gc_new(newRef->m_mask->m_bitmap);
 969         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 970             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 971         g_object_unref(gc);
 972     }
 973 #if wxUSE_PALETTE
 974     // implement this if SetPalette is ever implemented
 975     wxASSERT(oldRef->m_palette == NULL);
 976 #endif
 977
 978     return newRef;
 979 }
 980
 981 //-----------------------------------------------------------------------------
 982 // wxBitmapHandler
 983 //-----------------------------------------------------------------------------
 984
 985 IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
 986
 987 /* static */ void wxBitmap::InitStandardHandlers()
 988 {
 989     // TODO: Insert handler based on GdkPixbufs handler later
 990 }