1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/bitmap.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // RCS-ID: $Id: bitmap.cpp 57052 2008-12-01 02:03:38Z PC $
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
IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)38 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
39
40 wxMask::wxMask()
41 {
42 m_bitmap = (GdkBitmap *) NULL;
43 }
44
wxMask(const wxBitmap & bitmap,const wxColour & colour)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
wxMask(const wxBitmap & bitmap,int paletteIndex)52 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
53 {
54 m_bitmap = (GdkBitmap *) NULL;
55 Create( bitmap, paletteIndex );
56 }
57 #endif // wxUSE_PALETTE
58
wxMask(const wxBitmap & bitmap)59 wxMask::wxMask( const wxBitmap& bitmap )
60 {
61 m_bitmap = (GdkBitmap *) NULL;
62 Create( bitmap );
63 }
64
~wxMask()65 wxMask::~wxMask()
66 {
67 if (m_bitmap)
68 g_object_unref (m_bitmap);
69 }
70
Create(const wxBitmap & bitmap,const wxColour & colour)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
Create(const wxBitmap & bitmap,int paletteIndex)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
Create(const wxBitmap & bitmap)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
GetBitmap() const175 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
wxBitmapRefData()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
~wxBitmapRefData()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
IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)230 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
231
232 wxBitmap::wxBitmap(int width, int height, int depth)
233 {
234 Create(width, height, depth);
235 }
236
wxBitmap(const wxString & filename,wxBitmapType type)237 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
238 {
239 LoadFile(filename, type);
240 }
241
wxBitmap(const char bits[],int width,int height,int depth)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
wxBitmap(const char * const * bits)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
~wxBitmap()267 wxBitmap::~wxBitmap()
268 {
269 }
270
Create(int width,int height,int depth)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 // must initialize alpha, otherwise GetPixmap()
284 // will create a mask out of garbage
285 gdk_pixbuf_fill(M_BMPDATA->m_pixbuf, 0x000000ff);
286 }
287 else
288 {
289 if (depth != 1)
290 {
291 const GdkVisual* visual = wxTheApp->GetGdkVisual();
292 if (depth == -1)
293 depth = visual->depth;
294
295 wxCHECK_MSG(depth == visual->depth, false, wxT("invalid bitmap depth"));
296 }
297
298 SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
299 }
300
301 return Ok();
302 }
303
Rescale(int clipx,int clipy,int clipwidth,int clipheight,int newx,int newy) const304 wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy) const
305 {
306 wxBitmap bmp;
307
308 wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
309
310 if (newx==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
311 return *this;
312
313 int width = wxMax(newx, 1);
314 int height = wxMax(newy, 1);
315 width = wxMin(width, clipwidth);
316 height = wxMin(height, clipheight);
317
318 // scale pixbuf if available and it has alpha or there is no mask
319 if (M_BMPDATA->m_pixbuf != NULL && (
320 M_BMPDATA->m_mask == NULL || gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf)))
321 {
322 bmp.SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB,
323 gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf),
324 8, width, height), M_BMPDATA->m_bpp);
325 gdk_pixbuf_scale(M_BMPDATA->m_pixbuf, bmp.GetPixbuf(),
326 0, 0, width, height,
327 -clipx, -clipy,
328 (double)newx/GetWidth(), (double)newy/GetHeight(),
329 GDK_INTERP_BILINEAR);
330 }
331 else
332 {
333 GdkImage* img = gdk_drawable_get_image(
334 M_BMPDATA->m_pixmap, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
335
336 bmp.Create(width, height, gdk_drawable_get_depth(M_BMPDATA->m_pixmap));
337 GdkImage* img_scaled = gdk_drawable_get_image(bmp.GetPixmap(), 0, 0, width, height);
338
339 // be careful to use the right scaling factor
340 float scx = (float)M_BMPDATA->m_width/(float)newx;
341 float scy = (float)M_BMPDATA->m_height/(float)newy;
342 // prepare accel-tables
343 int *tablex = (int *)calloc(width,sizeof(int));
344 int *tabley = (int *)calloc(height,sizeof(int));
345
346 // accel table filled with clipped values
347 for (int x = 0; x < width; x++)
348 tablex[x] = (int) (scx * (x+clipx));
349 for (int y = 0; y < height; y++)
350 tabley[y] = (int) (scy * (y+clipy));
351
352 // Main rescaling routine starts here
353 for (int h = 0; h < height; h++)
354 {
355 int old_x = -1;
356 guint32 old_pixval = 0;
357
358 for (int w = 0; w < width; w++)
359 {
360 guint32 pixval;
361 int x = tablex[w];
362 if (x == old_x)
363 pixval = old_pixval;
364 else
365 {
366 pixval = gdk_image_get_pixel( img, x, tabley[h] );
367 old_pixval = pixval;
368 old_x = x;
369 }
370
371 gdk_image_put_pixel(img_scaled, w, h, pixval);
372 }
373 }
374
375 g_object_unref (img);
376
377 GdkGC* gc = gdk_gc_new(bmp.GetPixmap());
378 gdk_draw_image(bmp.GetPixmap(), gc, img_scaled, 0, 0, 0, 0, -1, -1);
379 g_object_unref(gc);
380 g_object_unref(img_scaled);
381
382 if (GetMask())
383 {
384 size_t dstbyteperline = (width + 7) / 8;
385 char* dst = (char*) malloc(dstbyteperline*height);
386 img = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight());
387
388 for (int h = 0; h < height; h++)
389 {
390 char outbyte = 0;
391 int old_x = -1;
392 guint32 old_pixval = 0;
393
394 for (int w = 0; w < width; w++)
395 {
396 guint32 pixval;
397 int x = tablex[w];
398 if (x == old_x)
399 pixval = old_pixval;
400 else
401 {
402 pixval = gdk_image_get_pixel( img, x, tabley[h] );
403 old_pixval = pixval;
404 old_x = x;
405 }
406
407 if (pixval)
408 {
409 char bit=1;
410 char shift = bit << (w % 8);
411 outbyte |= shift;
412 }
413
414 if ((w+1)%8 == 0)
415 {
416 dst[h*dstbyteperline+w/8] = outbyte;
417 outbyte = 0;
418 }
419 }
420
421 // do not forget the last byte
422 if (width % 8 != 0)
423 dst[h*dstbyteperline+width/8] = outbyte;
424 }
425 wxMask* mask = new wxMask;
426 mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
427 bmp.SetMask(mask);
428
429 free( dst );
430 g_object_unref (img);
431 }
432
433 free( tablex );
434 free( tabley );
435 }
436
437 return bmp;
438 }
439
CreateFromImage(const wxImage & image,int depth)440 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
441 {
442 UnRef();
443
444 wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
445 wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
446
447 if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
448 return false;
449
450 // create pixbuf if image has alpha and requested depth is compatible
451 if (image.HasAlpha() && (depth == -1 || depth == 32))
452 return CreateFromImageAsPixbuf(image);
453
454 // otherwise create pixmap, if alpha is present it will be converted to mask
455 return CreateFromImageAsPixmap(image, depth);
456 }
457
CreateFromImageAsPixmap(const wxImage & image,int depth)458 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
459 {
460 const int w = image.GetWidth();
461 const int h = image.GetHeight();
462 if (depth == 1)
463 {
464 // create XBM format bitmap
465
466 // one bit per pixel, each row starts on a byte boundary
467 const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
468 wxByte* out = new wxByte[out_size];
469 // set bits are black
470 memset(out, 0xff, out_size);
471 const wxByte* in = image.GetData();
472 unsigned bit_index = 0;
473 for (int y = 0; y < h; y++)
474 {
475 for (int x = 0; x < w; x++, in += 3, bit_index++)
476 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
477 out[bit_index >> 3] ^= 1 << (bit_index & 7);
478 // move index to next byte boundary
479 bit_index = (bit_index + 7) & ~7u;
480 }
481 SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
482 delete[] out;
483 }
484 else
485 {
486 SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
487 GdkGC* gc = gdk_gc_new(M_BMPDATA->m_pixmap);
488 gdk_draw_rgb_image(
489 M_BMPDATA->m_pixmap, gc,
490 0, 0, w, h,
491 GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
492 g_object_unref(gc);
493 }
494
495 const wxByte* alpha = image.GetAlpha();
496 if (alpha != NULL || image.HasMask())
497 {
498 // create mask as XBM format bitmap
499
500 const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
501 wxByte* out = new wxByte[out_size];
502 memset(out, 0xff, out_size);
503 unsigned bit_index = 0;
504 if (alpha != NULL)
505 {
506 for (int y = 0; y < h; y++)
507 {
508 for (int x = 0; x < w; x++, bit_index++)
509 if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
510 out[bit_index >> 3] ^= 1 << (bit_index & 7);
511 bit_index = (bit_index + 7) & ~7u;
512 }
513 }
514 else
515 {
516 const wxByte r_mask = image.GetMaskRed();
517 const wxByte g_mask = image.GetMaskGreen();
518 const wxByte b_mask = image.GetMaskBlue();
519 const wxByte* in = image.GetData();
520 for (int y = 0; y < h; y++)
521 {
522 for (int x = 0; x < w; x++, in += 3, bit_index++)
523 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
524 out[bit_index >> 3] ^= 1 << (bit_index & 7);
525 bit_index = (bit_index + 7) & ~7u;
526 }
527 }
528 wxMask* mask = new wxMask;
529 mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
530 SetMask(mask);
531 delete[] out;
532 }
533 return true;
534 }
535
CreateFromImageAsPixbuf(const wxImage & image)536 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
537 {
538 wxASSERT(image.HasAlpha());
539
540 int width = image.GetWidth();
541 int height = image.GetHeight();
542
543 Create(width, height, 32);
544 GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
545 if (!pixbuf)
546 return false;
547
548 // Copy the data:
549 const unsigned char* in = image.GetData();
550 unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
551 unsigned char *alpha = image.GetAlpha();
552
553 int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
554
555 for (int y = 0; y < height; y++, out += rowpad)
556 {
557 for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
558 {
559 out[0] = in[0];
560 out[1] = in[1];
561 out[2] = in[2];
562 out[3] = *alpha;
563 }
564 }
565
566 return true;
567 }
568
ConvertToImage() const569 wxImage wxBitmap::ConvertToImage() const
570 {
571 wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
572
573 const int w = GetWidth();
574 const int h = GetHeight();
575 wxImage image(w, h, false);
576 unsigned char *data = image.GetData();
577
578 wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
579
580 // prefer pixbuf if available, it will preserve alpha and should be quicker
581 if (HasPixbuf())
582 {
583 GdkPixbuf *pixbuf = GetPixbuf();
584 unsigned char* alpha = NULL;
585 if (gdk_pixbuf_get_has_alpha(pixbuf))
586 {
587 image.SetAlpha();
588 alpha = image.GetAlpha();
589 }
590 const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
591 unsigned char *out = data;
592 const int inc = 3 + int(alpha != NULL);
593 const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
594
595 for (int y = 0; y < h; y++, in += rowpad)
596 {
597 for (int x = 0; x < w; x++, in += inc, out += 3)
598 {
599 out[0] = in[0];
600 out[1] = in[1];
601 out[2] = in[2];
602 if (alpha != NULL)
603 *alpha++ = in[3];
604 }
605 }
606 }
607 else
608 {
609 GdkPixmap* pixmap = GetPixmap();
610 GdkPixmap* pixmap_invert = NULL;
611 if (GetDepth() == 1)
612 {
613 // mono bitmaps are inverted, i.e. 0 is white
614 pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
615 GdkGC* gc = gdk_gc_new(pixmap_invert);
616 gdk_gc_set_function(gc, GDK_COPY_INVERT);
617 gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
618 g_object_unref(gc);
619 pixmap = pixmap_invert;
620 }
621 // create a pixbuf which shares data with the wxImage
622 GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
623 data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
624
625 gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
626
627 g_object_unref(pixbuf);
628 if (pixmap_invert != NULL)
629 g_object_unref(pixmap_invert);
630 }
631 // convert mask, unless there is already alpha
632 if (GetMask() && !image.HasAlpha())
633 {
634 // we hard code the mask colour for now but we could also make an
635 // effort (and waste time) to choose a colour not present in the
636 // image already to avoid having to fudge the pixels below --
637 // whether it's worth to do it is unclear however
638 const int MASK_RED = 1;
639 const int MASK_GREEN = 2;
640 const int MASK_BLUE = 3;
641 const int MASK_BLUE_REPLACEMENT = 2;
642
643 image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
644 GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
645
646 for (int y = 0; y < h; y++)
647 {
648 for (int x = 0; x < w; x++, data += 3)
649 {
650 if (gdk_image_get_pixel(image_mask, x, y) == 0)
651 {
652 data[0] = MASK_RED;
653 data[1] = MASK_GREEN;
654 data[2] = MASK_BLUE;
655 }
656 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
657 {
658 // we have to fudge the colour a bit to prevent
659 // this pixel from appearing transparent
660 data[2] = MASK_BLUE_REPLACEMENT;
661 }
662 }
663 }
664 g_object_unref(image_mask);
665 }
666
667 return image;
668 }
669
IsOk() const670 bool wxBitmap::IsOk() const
671 {
672 return (m_refData != NULL) &&
673 (
674 M_BMPDATA->m_pixbuf ||
675 M_BMPDATA->m_pixmap
676 );
677 }
678
GetHeight() const679 int wxBitmap::GetHeight() const
680 {
681 wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
682
683 return M_BMPDATA->m_height;
684 }
685
GetWidth() const686 int wxBitmap::GetWidth() const
687 {
688 wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
689
690 return M_BMPDATA->m_width;
691 }
692
GetDepth() const693 int wxBitmap::GetDepth() const
694 {
695 wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
696
697 return M_BMPDATA->m_bpp;
698 }
699
GetMask() const700 wxMask *wxBitmap::GetMask() const
701 {
702 wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
703
704 return M_BMPDATA->m_mask;
705 }
706
SetMask(wxMask * mask)707 void wxBitmap::SetMask( wxMask *mask )
708 {
709 wxCHECK_RET( Ok(), wxT("invalid bitmap") );
710
711 AllocExclusive();
712 delete M_BMPDATA->m_mask;
713 M_BMPDATA->m_mask = mask;
714 }
715
CopyFromIcon(const wxIcon & icon)716 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
717 {
718 *this = icon;
719 return Ok();
720 }
721
GetSubBitmap(const wxRect & rect) const722 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
723 {
724 wxBitmap ret;
725
726 wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
727 wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
728 rect.x + rect.width <= M_BMPDATA->m_width &&
729 rect.y + rect.height <= M_BMPDATA->m_height,
730 ret, wxT("invalid bitmap region"));
731
732 if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
733 {
734 GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
735 gdk_pixbuf_get_has_alpha(GetPixbuf()),
736 8, rect.width, rect.height);
737 ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
738 gdk_pixbuf_copy_area(GetPixbuf(),
739 rect.x, rect.y, rect.width, rect.height,
740 pixbuf, 0, 0);
741 }
742 else
743 {
744 ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
745 GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
746 gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
747 g_object_unref (gc);
748 }
749 // make mask, unless there is already alpha
750 if (GetMask() && !HasAlpha())
751 {
752 wxMask *mask = new wxMask;
753 mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
754
755 GdkGC *gc = gdk_gc_new( mask->m_bitmap );
756 gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
757 g_object_unref (gc);
758
759 ret.SetMask( mask );
760 }
761
762 return ret;
763 }
764
SaveFile(const wxString & name,wxBitmapType type,const wxPalette * WXUNUSED (palette)) const765 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
766 {
767 wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
768
769 // Try to save the bitmap via wxImage handlers:
770 wxImage image = ConvertToImage();
771 return image.Ok() && image.SaveFile(name, type);
772 }
773
LoadFile(const wxString & name,wxBitmapType type)774 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
775 {
776 UnRef();
777
778 if (type == wxBITMAP_TYPE_XPM)
779 {
780 GdkBitmap *mask = (GdkBitmap*) NULL;
781 SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
782
783 if (mask)
784 {
785 M_BMPDATA->m_mask = new wxMask;
786 M_BMPDATA->m_mask->m_bitmap = mask;
787 }
788 }
789 else // try if wxImage can load it
790 {
791 wxImage image;
792 if (image.LoadFile(name, type) && image.Ok())
793 CreateFromImage(image, -1);
794 }
795
796 return Ok();
797 }
798
799 #if wxUSE_PALETTE
GetPalette() const800 wxPalette *wxBitmap::GetPalette() const
801 {
802 wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
803
804 return M_BMPDATA->m_palette;
805 }
806
SetPalette(const wxPalette & WXUNUSED (palette))807 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
808 {
809 // TODO
810 }
811 #endif // wxUSE_PALETTE
812
SetHeight(int height)813 void wxBitmap::SetHeight( int height )
814 {
815 AllocExclusive();
816 M_BMPDATA->m_height = height;
817 }
818
SetWidth(int width)819 void wxBitmap::SetWidth( int width )
820 {
821 AllocExclusive();
822 M_BMPDATA->m_width = width;
823 }
824
SetDepth(int depth)825 void wxBitmap::SetDepth( int depth )
826 {
827 AllocExclusive();
828 M_BMPDATA->m_bpp = depth;
829 }
830
SetPixmap(GdkPixmap * pixmap)831 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
832 {
833 if (!m_refData)
834 m_refData = new wxBitmapRefData;
835
836 // AllocExclusive should not be needed for this internal function
837 wxASSERT(m_refData->GetRefCount() == 1);
838 wxASSERT(M_BMPDATA->m_pixmap == NULL);
839 M_BMPDATA->m_pixmap = pixmap;
840 gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
841 M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
842 PurgeOtherRepresentations(Pixmap);
843 }
844
GetPixmap() const845 GdkPixmap *wxBitmap::GetPixmap() const
846 {
847 wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
848
849 // create the pixmap on the fly if we use Pixbuf representation:
850 if (M_BMPDATA->m_pixmap == NULL)
851 {
852 GdkPixmap** pmask = NULL;
853 if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
854 {
855 // make new mask from alpha
856 delete M_BMPDATA->m_mask;
857 M_BMPDATA->m_mask = new wxMask;
858 pmask = &M_BMPDATA->m_mask->m_bitmap;
859 }
860 gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
861 &M_BMPDATA->m_pixmap,
862 pmask,
863 wxIMAGE_ALPHA_THRESHOLD);
864 }
865
866 return M_BMPDATA->m_pixmap;
867 }
868
HasPixmap() const869 bool wxBitmap::HasPixmap() const
870 {
871 wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
872
873 return M_BMPDATA->m_pixmap != NULL;
874 }
875
GetPixbuf() const876 GdkPixbuf *wxBitmap::GetPixbuf() const
877 {
878 wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
879
880 if (M_BMPDATA->m_pixbuf == NULL)
881 {
882 int width = GetWidth();
883 int height = GetHeight();
884
885 GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
886 GetMask() != NULL,
887 8, width, height);
888 M_BMPDATA->m_pixbuf = pixbuf;
889 gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
890 0, 0, 0, 0, width, height);
891
892 // apply the mask to created pixbuf:
893 if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
894 {
895 GdkPixbuf *pmask =
896 gdk_pixbuf_get_from_drawable(NULL,
897 M_BMPDATA->m_mask->GetBitmap(),
898 NULL,
899 0, 0, 0, 0, width, height);
900 if (pmask)
901 {
902 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
903 guchar *mask = gdk_pixbuf_get_pixels(pmask);
904 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
905 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
906
907 for (int y = 0; y < height;
908 y++, bmp += bmprowinc, mask += maskrowinc)
909 {
910 for (int x = 0; x < width; x++, bmp += 4, mask += 3)
911 {
912 if (mask[0] == 0 /*black pixel*/)
913 bmp[3] = 0;
914 }
915 }
916
917 g_object_unref (pmask);
918 }
919 }
920 }
921
922 return M_BMPDATA->m_pixbuf;
923 }
924
HasPixbuf() const925 bool wxBitmap::HasPixbuf() const
926 {
927 wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
928
929 return M_BMPDATA->m_pixbuf != NULL;
930 }
931
SetPixbuf(GdkPixbuf * pixbuf,int depth)932 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
933 {
934 if (!m_refData)
935 m_refData = new wxBitmapRefData;
936
937 // AllocExclusive should not be needed for this internal function
938 wxASSERT(m_refData->GetRefCount() == 1);
939 wxASSERT(M_BMPDATA->m_pixbuf == NULL);
940 M_BMPDATA->m_pixbuf = pixbuf;
941 M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
942 M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
943 // if depth specified
944 if (depth != 0)
945 M_BMPDATA->m_bpp = depth;
946 else if (M_BMPDATA->m_bpp == 0)
947 // use something reasonable
948 M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
949 PurgeOtherRepresentations(Pixbuf);
950 }
951
PurgeOtherRepresentations(wxBitmap::Representation keep)952 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
953 {
954 if (keep == Pixmap && HasPixbuf())
955 {
956 g_object_unref (M_BMPDATA->m_pixbuf);
957 M_BMPDATA->m_pixbuf = NULL;
958 }
959 if (keep == Pixbuf && HasPixmap())
960 {
961 g_object_unref (M_BMPDATA->m_pixmap);
962 M_BMPDATA->m_pixmap = NULL;
963 }
964 }
965
GetRawData(wxPixelDataBase & data,int bpp)966 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
967 {
968 void* bits = NULL;
969 GdkPixbuf *pixbuf = GetPixbuf();
970 const bool hasAlpha = HasAlpha();
971 // allow access if bpp is valid and matches existence of alpha
972 if ( pixbuf && (((bpp == 24) && !hasAlpha) || ((bpp == 32) && hasAlpha)) )
973 {
974 data.m_height = gdk_pixbuf_get_height( pixbuf );
975 data.m_width = gdk_pixbuf_get_width( pixbuf );
976 data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
977 bits = gdk_pixbuf_get_pixels(pixbuf);
978 }
979 return bits;
980 }
981
UngetRawData(wxPixelDataBase & WXUNUSED (data))982 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
983 {
984 }
985
HasAlpha() const986 bool wxBitmap::HasAlpha() const
987 {
988 return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
989 gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
990 }
991
UseAlpha()992 void wxBitmap::UseAlpha()
993 {
994 GdkPixbuf* pixbuf = GetPixbuf();
995 // add alpha if necessary
996 if (!gdk_pixbuf_get_has_alpha(pixbuf))
997 {
998 M_BMPDATA->m_pixbuf = NULL;
999 AllocExclusive();
1000 M_BMPDATA->m_pixbuf = gdk_pixbuf_add_alpha(pixbuf, false, 0, 0, 0);
1001 g_object_unref(pixbuf);
1002 }
1003 }
1004
CreateRefData() const1005 wxObjectRefData* wxBitmap::CreateRefData() const
1006 {
1007 return new wxBitmapRefData;
1008 }
1009
CloneRefData(const wxObjectRefData * data) const1010 wxObjectRefData* wxBitmap::CloneRefData(const wxObjectRefData* data) const
1011 {
1012 const wxBitmapRefData* oldRef = wx_static_cast(const wxBitmapRefData*, data);
1013 wxBitmapRefData* newRef = new wxBitmapRefData;
1014 newRef->m_width = oldRef->m_width;
1015 newRef->m_height = oldRef->m_height;
1016 newRef->m_bpp = oldRef->m_bpp;
1017 if (oldRef->m_pixmap != NULL)
1018 {
1019 newRef->m_pixmap = gdk_pixmap_new(
1020 oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
1021 // use pixmap depth, m_bpp may not match
1022 gdk_drawable_get_depth(oldRef->m_pixmap));
1023 GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
1024 gdk_draw_drawable(
1025 newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
1026 g_object_unref(gc);
1027 }
1028 if (oldRef->m_pixbuf != NULL)
1029 {
1030 newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
1031 }
1032 if (oldRef->m_mask != NULL)
1033 {
1034 newRef->m_mask = new wxMask;
1035 newRef->m_mask->m_bitmap = gdk_pixmap_new(
1036 oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
1037 GdkGC* gc = gdk_gc_new(newRef->m_mask->m_bitmap);
1038 gdk_draw_drawable(newRef->m_mask->m_bitmap,
1039 gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
1040 g_object_unref(gc);
1041 }
1042 #if wxUSE_PALETTE
1043 // implement this if SetPalette is ever implemented
1044 wxASSERT(oldRef->m_palette == NULL);
1045 #endif
1046
1047 return newRef;
1048 }
1049
1050 //-----------------------------------------------------------------------------
1051 // wxBitmapHandler
1052 //-----------------------------------------------------------------------------
1053
IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler,wxBitmapHandlerBase)1054 IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
1055
1056 /* static */ void wxBitmap::InitStandardHandlers()
1057 {
1058 // TODO: Insert handler based on GdkPixbufs handler later
1059 }
1060