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     } else
 289     if (depth == 24)
 290     {
 291         if (visual->depth == depth)
 292             SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 293         else
 294             SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, width, height), 24);
 295     }
 296     else
 297     {
 298         if (depth != 1)
 299         {
 300             if (depth == -1)
 301                 depth = visual->depth;
 302         }
 303         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 304     }
 305
 306     return Ok();
 307 }
 308
 309 wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight,
 310                            int width, int height) const
 311 {
 312     wxBitmap bmp;
 313
 314     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 315
 316     width = wxMax(width, 1);
 317     height = wxMax(height, 1);
 318
 319     const double scale_x = double(width) / clipwidth;
 320     const double scale_y = double(height) / clipheight;
 321
 322     // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
 323     // back, is faster than scaling pixmap ourselves.
 324
 325     // use pixbuf if already available,
 326     // otherwise create temporary pixbuf from pixmap
 327     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 328     if (pixbuf)
 329         g_object_ref(pixbuf);
 330     else
 331         pixbuf = gdk_pixbuf_get_from_drawable(
 332             NULL, M_BMPDATA->m_pixmap, NULL,
 333             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 334
 335     // new pixbuf for scaled wxBitmap
 336     GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
 337         GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
 338
 339     // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
 340     // images, but the only one which preserves sharp edges
 341     gdk_pixbuf_scale(
 342         pixbuf, pixbuf_scaled,
 343         0, 0, width, height, -clipx*scale_x, -clipy*scale_y, scale_x, scale_y,
 344         GDK_INTERP_NEAREST);
 345
 346     g_object_unref(pixbuf);
 347     bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
 348
 349     if (M_BMPDATA->m_mask)
 350     {
 351         pixbuf = gdk_pixbuf_get_from_drawable(
 352             NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
 353             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 354
 355         pixbuf_scaled = gdk_pixbuf_new(
 356             GDK_COLORSPACE_RGB, false, 8, width, height);
 357
 358         gdk_pixbuf_scale(
 359             pixbuf, pixbuf_scaled,
 360             0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
 361             GDK_INTERP_NEAREST);
 362
 363         g_object_unref(pixbuf);
 364
 365         // use existing functionality to create mask from scaled pixbuf
 366         wxBitmap maskbmp;
 367         maskbmp.SetPixbuf(pixbuf_scaled);
 368         bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
 369     }
 370     return bmp;
 371 }
 372
 373 #if wxUSE_IMAGE
 374
 375 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 376 {
 377     UnRef();
 378
 379     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 380     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 381
 382     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 383         return false;
 384
 385     // create pixbuf if image has alpha and requested depth is compatible
 386     if (image.HasAlpha() && (depth == -1 || depth == 32))
 387         return CreateFromImageAsPixbuf(image);
 388
 389     // otherwise create pixmap, if alpha is present it will be converted to mask
 390     return CreateFromImageAsPixmap(image, depth);
 391 }
 392
 393 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 394 {
 395     const int w = image.GetWidth();
 396     const int h = image.GetHeight();
 397     if (depth == 1)
 398     {
 399         // create XBM format bitmap
 400
 401         // one bit per pixel, each row starts on a byte boundary
 402         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 403         wxByte* out = new wxByte[out_size];
 404         // set bits are black
 405         memset(out, 0xff, out_size);
 406         const wxByte* in = image.GetData();
 407         unsigned bit_index = 0;
 408         for (int y = 0; y < h; y++)
 409         {
 410             for (int x = 0; x < w; x++, in += 3, bit_index++)
 411                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 412                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 413             // move index to next byte boundary
 414             bit_index = (bit_index + 7) & ~7u;
 415         }
 416         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 417         delete[] out;
 418     }
 419     else
 420     {
 421         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 422         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 423         gdk_draw_rgb_image(
 424             M_BMPDATA->m_pixmap, gc,
 425             0, 0, w, h,
 426             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 427     }
 428
 429     const wxByte* alpha = image.GetAlpha();
 430     if (alpha != NULL || image.HasMask())
 431     {
 432         // create mask as XBM format bitmap
 433
 434         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 435         wxByte* out = new wxByte[out_size];
 436         memset(out, 0xff, out_size);
 437         unsigned bit_index = 0;
 438         if (alpha != NULL)
 439         {
 440             for (int y = 0; y < h; y++)
 441             {
 442                 for (int x = 0; x < w; x++, bit_index++)
 443                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 444                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 445                 bit_index = (bit_index + 7) & ~7u;
 446             }
 447         }
 448         else
 449         {
 450             const wxByte r_mask = image.GetMaskRed();
 451             const wxByte g_mask = image.GetMaskGreen();
 452             const wxByte b_mask = image.GetMaskBlue();
 453             const wxByte* in = image.GetData();
 454             for (int y = 0; y < h; y++)
 455             {
 456                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 457                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 458                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 459                 bit_index = (bit_index + 7) & ~7u;
 460             }
 461         }
 462         wxMask* mask = new wxMask;
 463         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 464         SetMask(mask);
 465         delete[] out;
 466     }
 467     return true;
 468 }
 469
 470 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 471 {
 472     wxASSERT(image.HasAlpha());
 473
 474     int width = image.GetWidth();
 475     int height = image.GetHeight();
 476
 477     Create(width, height, 32);
 478     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 479     if (!pixbuf)
 480         return false;
 481
 482     // Copy the data:
 483     const unsigned char* in = image.GetData();
 484     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 485     unsigned char *alpha = image.GetAlpha();
 486
 487     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 488
 489     for (int y = 0; y < height; y++, out += rowpad)
 490     {
 491         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 492         {
 493             out[0] = in[0];
 494             out[1] = in[1];
 495             out[2] = in[2];
 496             out[3] = *alpha;
 497         }
 498     }
 499
 500     return true;
 501 }
 502
 503 wxImage wxBitmap::ConvertToImage() const
 504 {
 505     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 506
 507     const int w = GetWidth();
 508     const int h = GetHeight();
 509     wxImage image(w, h, false);
 510     unsigned char *data = image.GetData();
 511
 512     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 513
 514     // prefer pixbuf if available, it will preserve alpha and should be quicker
 515     if (HasPixbuf())
 516     {
 517         GdkPixbuf *pixbuf = GetPixbuf();
 518         unsigned char* alpha = NULL;
 519         if (gdk_pixbuf_get_has_alpha(pixbuf))
 520         {
 521             image.SetAlpha();
 522             alpha = image.GetAlpha();
 523         }
 524         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 525         unsigned char *out = data;
 526         const int inc = 3 + int(alpha != NULL);
 527         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 528
 529         for (int y = 0; y < h; y++, in += rowpad)
 530         {
 531             for (int x = 0; x < w; x++, in += inc, out += 3)
 532             {
 533                 out[0] = in[0];
 534                 out[1] = in[1];
 535                 out[2] = in[2];
 536                 if (alpha != NULL)
 537                     *alpha++ = in[3];
 538             }
 539         }
 540     }
 541     else
 542     {
 543         GdkPixmap* pixmap = GetPixmap();
 544         GdkPixmap* pixmap_invert = NULL;
 545         if (GetDepth() == 1)
 546         {
 547             // mono bitmaps are inverted, i.e. 0 is white
 548             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 549             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 550             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 551             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 552             pixmap = pixmap_invert;
 553         }
 554         // create a pixbuf which shares data with the wxImage
 555         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 556             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 557
 558         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 559
 560         g_object_unref(pixbuf);
 561         if (pixmap_invert != NULL)
 562             g_object_unref(pixmap_invert);
 563     }
 564     // convert mask, unless there is already alpha
 565     if (GetMask() && !image.HasAlpha())
 566     {
 567         // we hard code the mask colour for now but we could also make an
 568         // effort (and waste time) to choose a colour not present in the
 569         // image already to avoid having to fudge the pixels below --
 570         // whether it's worth to do it is unclear however
 571         const int MASK_RED = 1;
 572         const int MASK_GREEN = 2;
 573         const int MASK_BLUE = 3;
 574         const int MASK_BLUE_REPLACEMENT = 2;
 575
 576         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 577         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 578
 579         for (int y = 0; y < h; y++)
 580         {
 581             for (int x = 0; x < w; x++, data += 3)
 582             {
 583                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 584                 {
 585                     data[0] = MASK_RED;
 586                     data[1] = MASK_GREEN;
 587                     data[2] = MASK_BLUE;
 588                 }
 589                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 590                 {
 591                     // we have to fudge the colour a bit to prevent
 592                     // this pixel from appearing transparent
 593                     data[2] = MASK_BLUE_REPLACEMENT;
 594                 }
 595             }
 596         }
 597         g_object_unref(image_mask);
 598     }
 599
 600     return image;
 601 }
 602
 603 #endif // wxUSE_IMAGE
 604
 605 int wxBitmap::GetHeight() const
 606 {
 607     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 608
 609     return M_BMPDATA->m_height;
 610 }
 611
 612 int wxBitmap::GetWidth() const
 613 {
 614     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 615
 616     return M_BMPDATA->m_width;
 617 }
 618
 619 int wxBitmap::GetDepth() const
 620 {
 621     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 622
 623     return M_BMPDATA->m_bpp;
 624 }
 625
 626 wxMask *wxBitmap::GetMask() const
 627 {
 628     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 629
 630     return M_BMPDATA->m_mask;
 631 }
 632
 633 void wxBitmap::SetMask( wxMask *mask )
 634 {
 635     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 636
 637     AllocExclusive();
 638     delete M_BMPDATA->m_mask;
 639     M_BMPDATA->m_mask = mask;
 640 }
 641
 642 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 643 {
 644     *this = icon;
 645     return Ok();
 646 }
 647
 648 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 649 {
 650     wxBitmap ret;
 651
 652     wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
 653     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 654                 rect.x + rect.width <= M_BMPDATA->m_width &&
 655                 rect.y + rect.height <= M_BMPDATA->m_height,
 656                 ret, wxT("invalid bitmap region"));
 657
 658     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 659     {
 660         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 661                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 662                                            8, rect.width, rect.height);
 663         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 664         gdk_pixbuf_copy_area(GetPixbuf(),
 665                              rect.x, rect.y, rect.width, rect.height,
 666                              pixbuf, 0, 0);
 667     }
 668     else
 669     {
 670         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 671         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 672         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 673     }
 674     // make mask, unless there is already alpha
 675     if (GetMask() && !HasAlpha())
 676     {
 677         wxMask *mask = new wxMask;
 678         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 679
 680         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 681         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 682
 683         ret.SetMask( mask );
 684     }
 685
 686     return ret;
 687 }
 688
 689 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 690 {
 691     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 692
 693 #if wxUSE_IMAGE
 694     // Try to save the bitmap via wxImage handlers:
 695     wxImage image = ConvertToImage();
 696     return image.Ok() && image.SaveFile(name, type);
 697 #else // !wxUSE_IMAGE
 698     wxUnusedVar(name);
 699     wxUnusedVar(type);
 700
 701     return false;
 702 #endif // wxUSE_IMAGE
 703 }
 704
 705 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 706 {
 707     UnRef();
 708
 709     if (type == wxBITMAP_TYPE_XPM)
 710     {
 711         GdkBitmap *mask = (GdkBitmap*) NULL;
 712         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 713
 714         if (mask)
 715         {
 716             M_BMPDATA->m_mask = new wxMask;
 717             M_BMPDATA->m_mask->m_bitmap = mask;
 718         }
 719     }
 720 #if wxUSE_IMAGE
 721     else // try if wxImage can load it
 722     {
 723         wxImage image;
 724         if (image.LoadFile(name, type) && image.Ok())
 725             CreateFromImage(image, -1);
 726     }
 727 #endif // wxUSE_IMAGE
 728
 729     return Ok();
 730 }
 731
 732 #if wxUSE_PALETTE
 733 wxPalette *wxBitmap::GetPalette() const
 734 {
 735     wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 736
 737     return M_BMPDATA->m_palette;
 738 }
 739
 740 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 741 {
 742     // TODO
 743 }
 744 #endif // wxUSE_PALETTE
 745
 746 void wxBitmap::SetHeight( int height )
 747 {
 748     AllocExclusive();
 749     M_BMPDATA->m_height = height;
 750 }
 751
 752 void wxBitmap::SetWidth( int width )
 753 {
 754     AllocExclusive();
 755     M_BMPDATA->m_width = width;
 756 }
 757
 758 void wxBitmap::SetDepth( int depth )
 759 {
 760     AllocExclusive();
 761     M_BMPDATA->m_bpp = depth;
 762 }
 763
 764 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 765 {
 766     if (!m_refData)
 767         m_refData = new wxBitmapRefData;
 768
 769     // AllocExclusive should not be needed for this internal function
 770     wxASSERT(m_refData->GetRefCount() == 1);
 771     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 772     M_BMPDATA->m_pixmap = pixmap;
 773     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 774     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 775     PurgeOtherRepresentations(Pixmap);
 776 }
 777
 778 GdkPixmap *wxBitmap::GetPixmap() const
 779 {
 780     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 781
 782     // create the pixmap on the fly if we use Pixbuf representation:
 783     if (M_BMPDATA->m_pixmap == NULL)
 784     {
 785         GdkPixmap** pmask = NULL;
 786         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 787         {
 788             // make new mask from alpha
 789             delete M_BMPDATA->m_mask;
 790             M_BMPDATA->m_mask = new wxMask;
 791             pmask = &M_BMPDATA->m_mask->m_bitmap;
 792         }
 793         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 794                                           &M_BMPDATA->m_pixmap,
 795                                           pmask,
 796                                           0x80 /* alpha threshold */);
 797     }
 798
 799     return M_BMPDATA->m_pixmap;
 800 }
 801
 802 bool wxBitmap::HasPixmap() const
 803 {
 804     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 805
 806     return M_BMPDATA->m_pixmap != NULL;
 807 }
 808
 809 GdkPixbuf *wxBitmap::GetPixbuf() const
 810 {
 811     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 812
 813     if (M_BMPDATA->m_pixbuf == NULL)
 814     {
 815
 816         int width = GetWidth();
 817         int height = GetHeight();
 818
 819         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 820                                            GetMask() != NULL,
 821                                            8, width, height);
 822         M_BMPDATA->m_pixbuf = pixbuf;
 823         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 824                                      0, 0, 0, 0, width, height);
 825         // apply the mask to created pixbuf:
 826         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 827         {
 828             GdkPixbuf *pmask =
 829                 gdk_pixbuf_get_from_drawable(NULL,
 830                                              M_BMPDATA->m_mask->GetBitmap(),
 831                                              NULL,
 832                                              0, 0, 0, 0, width, height);
 833             if (pmask)
 834             {
 835                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 836                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 837                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 838                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 839
 840                 for (int y = 0; y < height;
 841                      y++, bmp += bmprowinc, mask += maskrowinc)
 842                 {
 843                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 844                     {
 845                         if (mask[0] == 0 /*black pixel*/)
 846                             bmp[3] = 0;
 847                     }
 848                 }
 849
 850                 g_object_unref (pmask);
 851             }
 852         }
 853     }
 854
 855     return M_BMPDATA->m_pixbuf;
 856 }
 857
 858 bool wxBitmap::HasPixbuf() const
 859 {
 860     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 861
 862     return M_BMPDATA->m_pixbuf != NULL;
 863 }
 864
 865 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 866 {
 867     if (!m_refData)
 868         m_refData = new wxBitmapRefData;
 869
 870     // AllocExclusive should not be needed for this internal function
 871     wxASSERT(m_refData->GetRefCount() == 1);
 872     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 873     M_BMPDATA->m_pixbuf = pixbuf;
 874     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 875     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 876     // if depth specified
 877     if (depth != 0)
 878         M_BMPDATA->m_bpp = depth;
 879     else if (M_BMPDATA->m_bpp == 0)
 880         // use something reasonable
 881         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 882     PurgeOtherRepresentations(Pixbuf);
 883 }
 884
 885 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 886 {
 887     if (keep == Pixmap && HasPixbuf())
 888     {
 889         g_object_unref (M_BMPDATA->m_pixbuf);
 890         M_BMPDATA->m_pixbuf = NULL;
 891     }
 892     if (keep == Pixbuf && HasPixmap())
 893     {
 894         g_object_unref (M_BMPDATA->m_pixmap);
 895         M_BMPDATA->m_pixmap = NULL;
 896     }
 897 }
 898
 899 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 900 {
 901     void* bits = NULL;
 902     GdkPixbuf *pixbuf = GetPixbuf();
 903     const bool hasAlpha = HasAlpha();
 904
 905     // allow access if bpp is valid and matches existence of alpha
 906     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 907     {
 908         data.m_height = gdk_pixbuf_get_height( pixbuf );
 909         data.m_width = gdk_pixbuf_get_width( pixbuf );
 910         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 911         bits = gdk_pixbuf_get_pixels(pixbuf);
 912     }
 913     return bits;
 914 }
 915
 916 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 917 {
 918 }
 919
 920 bool wxBitmap::HasAlpha() const
 921 {
 922     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 923         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 924 }
 925
 926 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 927 {
 928     return new wxBitmapRefData;
 929 }
 930
 931 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 932 {
 933     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 934     wxBitmapRefData* newRef = new wxBitmapRefData;
 935     newRef->m_width = oldRef->m_width;
 936     newRef->m_height = oldRef->m_height;
 937     newRef->m_bpp = oldRef->m_bpp;
 938     if (oldRef->m_pixmap != NULL)
 939     {
 940         newRef->m_pixmap = gdk_pixmap_new(
 941             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 942             // use pixmap depth, m_bpp may not match
 943             gdk_drawable_get_depth(oldRef->m_pixmap));
 944         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 945         gdk_draw_drawable(
 946             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 947     }
 948     if (oldRef->m_pixbuf != NULL)
 949     {
 950         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 951     }
 952     if (oldRef->m_mask != NULL)
 953     {
 954         newRef->m_mask = new wxMask;
 955         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 956             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 957         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 958         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 959             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 960     }
 961 #if wxUSE_PALETTE
 962     // implement this if SetPalette is ever implemented
 963     wxASSERT(oldRef->m_palette == NULL);
 964 #endif
 965
 966     return newRef;
 967 }
 968
 969 /* static */ void wxBitmap::InitStandardHandlers()
 970 {
 971     // TODO: Insert handler based on GdkPixbufs handler later
 972 }