1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/dc.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // Copyright: (c) 1998 Robert Roebling
6 // Licence: wxWindows licence
7 /////////////////////////////////////////////////////////////////////////////
8
9 // For compilers that support precompilation, includes "wx.h".
10 #include "wx/wxprec.h"
11
12 #ifdef __WXGTK3__
13
14 #include "wx/window.h"
15 #include "wx/dcclient.h"
16 #include "wx/dcmemory.h"
17 #include "wx/dcscreen.h"
18 #include "wx/icon.h"
19 #include "wx/gtk/dc.h"
20
21 #include <gtk/gtk.h>
22
wxGTKCairoDCImpl(wxDC * owner)23 wxGTKCairoDCImpl::wxGTKCairoDCImpl(wxDC* owner)
24 : base_type(owner)
25 {
26 m_width = 0;
27 m_height = 0;
28 }
29
wxGTKCairoDCImpl(wxDC * owner,int)30 wxGTKCairoDCImpl::wxGTKCairoDCImpl(wxDC* owner, int)
31 : base_type(owner, 0)
32 {
33 m_width = 0;
34 m_height = 0;
35 }
36
wxGTKCairoDCImpl(wxDC * owner,wxWindow * window)37 wxGTKCairoDCImpl::wxGTKCairoDCImpl(wxDC* owner, wxWindow* window)
38 : base_type(owner, 0)
39 {
40 m_window = window;
41 m_font = window->GetFont();
42 m_textForegroundColour = window->GetForegroundColour();
43 m_textBackgroundColour = window->GetBackgroundColour();
44 m_width = 0;
45 m_height = 0;
46 }
47
Clear()48 void wxGTKCairoDCImpl::Clear()
49 {
50 wxCHECK_RET(IsOk(), "invalid DC");
51
52 cairo_t* cr = NULL;
53 if (m_graphicContext)
54 cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
55 if (cr)
56 {
57 double x1, y1, x2, y2;
58 cairo_clip_extents(cr, &x1, &y1, &x2, &y2);
59 m_graphicContext->SetBrush(m_backgroundBrush);
60 m_graphicContext->SetPen(wxPen());
61 const wxCompositionMode mode = m_graphicContext->GetCompositionMode();
62 m_graphicContext->SetCompositionMode(wxCOMPOSITION_SOURCE);
63 m_graphicContext->DrawRectangle(x1, y1, x2 - x1, y2 - y1);
64 m_graphicContext->SetCompositionMode(mode);
65 m_graphicContext->SetPen(m_pen);
66 m_graphicContext->SetBrush(m_brush);
67 }
68 }
69
DoDrawBitmap(const wxBitmap & bitmap,int x,int y,bool useMask)70 void wxGTKCairoDCImpl::DoDrawBitmap(const wxBitmap& bitmap, int x, int y, bool useMask)
71 {
72 wxCHECK_RET(IsOk(), "invalid DC");
73
74 cairo_t* cr = NULL;
75 if (m_graphicContext)
76 cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
77 if (cr)
78 {
79 cairo_save(cr);
80 bitmap.Draw(cr, x, y, useMask, &m_textForegroundColour, &m_textBackgroundColour);
81 cairo_restore(cr);
82 }
83 }
84
DoDrawIcon(const wxIcon & icon,int x,int y)85 void wxGTKCairoDCImpl::DoDrawIcon(const wxIcon& icon, int x, int y)
86 {
87 DoDrawBitmap(icon, x, y, true);
88 }
89
90 #if wxUSE_IMAGE
91 bool wxDoFloodFill(wxDC* dc, int x, int y, const wxColour& col, wxFloodFillStyle style);
92
DoFloodFill(int x,int y,const wxColour & col,wxFloodFillStyle style)93 bool wxGTKCairoDCImpl::DoFloodFill(int x, int y, const wxColour& col, wxFloodFillStyle style)
94 {
95 return wxDoFloodFill(GetOwner(), x, y, col, style);
96 }
97 #endif
98
DoGetAsBitmap(const wxRect *) const99 wxBitmap wxGTKCairoDCImpl::DoGetAsBitmap(const wxRect* /*subrect*/) const
100 {
101 wxFAIL_MSG("DoGetAsBitmap not implemented");
102 return wxBitmap();
103 }
104
DoGetPixel(int x,int y,wxColour * col) const105 bool wxGTKCairoDCImpl::DoGetPixel(int x, int y, wxColour* col) const
106 {
107 if (col)
108 {
109 cairo_t* cr = NULL;
110 if (m_graphicContext)
111 cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
112 if (cr)
113 {
114 cairo_surface_t* surface = cairo_get_target(cr);
115 x = LogicalToDeviceX(x);
116 y = LogicalToDeviceY(y);
117 GdkPixbuf* pixbuf = gdk_pixbuf_get_from_surface(surface, x, y, 1, 1);
118 if (pixbuf)
119 {
120 const guchar* src = gdk_pixbuf_get_pixels(pixbuf);
121 col->Set(src[0], src[1], src[2]);
122 g_object_unref(pixbuf);
123 return true;
124 }
125 *col = wxColour();
126 }
127 }
128 return false;
129 }
130
DoGetSize(int * width,int * height) const131 void wxGTKCairoDCImpl::DoGetSize(int* width, int* height) const
132 {
133 if (width)
134 *width = m_width;
135 if (height)
136 *height = m_height;
137 }
138
DoStretchBlit(int xdest,int ydest,int dstWidth,int dstHeight,wxDC * source,int xsrc,int ysrc,int srcWidth,int srcHeight,wxRasterOperationMode rop,bool useMask,int xsrcMask,int ysrcMask)139 bool wxGTKCairoDCImpl::DoStretchBlit(int xdest, int ydest, int dstWidth, int dstHeight, wxDC* source, int xsrc, int ysrc, int srcWidth, int srcHeight, wxRasterOperationMode rop, bool useMask, int xsrcMask, int ysrcMask)
140 {
141 wxCHECK_MSG(IsOk(), false, "invalid DC");
142 wxCHECK_MSG(source && source->IsOk(), false, "invalid source DC");
143
144 cairo_t* cr = NULL;
145 if (m_graphicContext)
146 cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
147 cairo_t* cr_src = NULL;
148 wxGraphicsContext* gc_src = source->GetGraphicsContext();
149 if (gc_src)
150 cr_src = static_cast<cairo_t*>(gc_src->GetNativeContext());
151
152 if (cr == NULL || cr_src == NULL)
153 return false;
154
155 const int xsrc_dev = source->LogicalToDeviceX(xsrc);
156 const int ysrc_dev = source->LogicalToDeviceY(ysrc);
157
158 cairo_surface_t* surface = cairo_get_target(cr_src);
159 cairo_surface_flush(surface);
160 cairo_save(cr);
161 cairo_translate(cr, xdest, ydest);
162 cairo_rectangle(cr, 0, 0, dstWidth, dstHeight);
163 double sx, sy;
164 source->GetUserScale(&sx, &sy);
165 cairo_scale(cr, dstWidth / (sx * srcWidth), dstHeight / (sy * srcHeight));
166 cairo_set_source_surface(cr, surface, -xsrc_dev, -ysrc_dev);
167 const wxRasterOperationMode rop_save = m_logicalFunction;
168 SetLogicalFunction(rop);
169 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
170 cairo_surface_t* maskSurf = NULL;
171 if (useMask)
172 {
173 const wxBitmap& bitmap = source->GetImpl()->GetSelectedBitmap();
174 if (bitmap.IsOk())
175 {
176 wxMask* mask = bitmap.GetMask();
177 if (mask)
178 maskSurf = *mask;
179 }
180 }
181 if (maskSurf)
182 {
183 int xsrcMask_dev = xsrc_dev;
184 int ysrcMask_dev = ysrc_dev;
185 if (xsrcMask != -1)
186 xsrcMask_dev = source->LogicalToDeviceX(xsrcMask);
187 if (ysrcMask != -1)
188 ysrcMask_dev = source->LogicalToDeviceY(ysrcMask);
189 cairo_clip(cr);
190 cairo_mask_surface(cr, maskSurf, -xsrcMask_dev, -ysrcMask_dev);
191 }
192 else
193 {
194 cairo_fill(cr);
195 }
196 cairo_restore(cr);
197 m_logicalFunction = rop_save;
198 return true;
199 }
200
GetCairoContext() const201 void* wxGTKCairoDCImpl::GetCairoContext() const
202 {
203 cairo_t* cr = NULL;
204 if (m_graphicContext)
205 cr = static_cast<cairo_t*>(m_graphicContext->GetNativeContext());
206 return cr;
207 }
208 //-----------------------------------------------------------------------------
209
wxWindowDCImpl(wxWindowDC * owner,wxWindow * window)210 wxWindowDCImpl::wxWindowDCImpl(wxWindowDC* owner, wxWindow* window)
211 : base_type(owner, window)
212 {
213 GtkWidget* widget = window->m_wxwindow;
214 if (widget == NULL)
215 widget = window->m_widget;
216 GdkWindow* gdkWindow = NULL;
217 if (widget)
218 {
219 gdkWindow = gtk_widget_get_window(widget);
220 m_ok = true;
221 }
222 if (gdkWindow)
223 {
224 cairo_t* cr = gdk_cairo_create(gdkWindow);
225 wxGraphicsContext* gc = wxGraphicsContext::CreateFromNative(cr);
226 gc->EnableOffset(true);
227 SetGraphicsContext(gc);
228 GtkAllocation a;
229 gtk_widget_get_allocation(widget, &a);
230 int x, y;
231 if (gtk_widget_get_has_window(widget))
232 {
233 m_width = gdk_window_get_width(gdkWindow);
234 m_height = gdk_window_get_height(gdkWindow);
235 x = m_width - a.width;
236 y = m_height - a.height;
237 }
238 else
239 {
240 m_width = a.width;
241 m_height = a.height;
242 x = a.x;
243 y = a.y;
244 cairo_rectangle(cr, a.x, a.y, a.width, a.height);
245 cairo_clip(cr);
246 }
247 if (x || y)
248 SetDeviceLocalOrigin(x, y);
249 }
250 else
251 SetGraphicsContext(wxGraphicsContext::Create());
252 }
253 //-----------------------------------------------------------------------------
254
wxClientDCImpl(wxClientDC * owner,wxWindow * window)255 wxClientDCImpl::wxClientDCImpl(wxClientDC* owner, wxWindow* window)
256 : base_type(owner, window)
257 {
258 GtkWidget* widget = window->m_wxwindow;
259 if (widget == NULL)
260 widget = window->m_widget;
261 GdkWindow* gdkWindow = NULL;
262 if (widget)
263 {
264 gdkWindow = gtk_widget_get_window(widget);
265 m_ok = true;
266 }
267 if (gdkWindow)
268 {
269 cairo_t* cr = gdk_cairo_create(gdkWindow);
270 wxGraphicsContext* gc = wxGraphicsContext::CreateFromNative(cr);
271 gc->EnableOffset(true);
272 SetGraphicsContext(gc);
273 if (gtk_widget_get_has_window(widget))
274 {
275 m_width = gdk_window_get_width(gdkWindow);
276 m_height = gdk_window_get_height(gdkWindow);
277 }
278 else
279 {
280 GtkAllocation a;
281 gtk_widget_get_allocation(widget, &a);
282 m_width = a.width;
283 m_height = a.height;
284 cairo_rectangle(cr, a.x, a.y, a.width, a.height);
285 cairo_clip(cr);
286 SetDeviceLocalOrigin(a.x, a.y);
287 }
288 }
289 else
290 SetGraphicsContext(wxGraphicsContext::Create());
291 }
292 //-----------------------------------------------------------------------------
293
wxPaintDCImpl(wxPaintDC * owner,wxWindow * window)294 wxPaintDCImpl::wxPaintDCImpl(wxPaintDC* owner, wxWindow* window)
295 : base_type(owner, window)
296 {
297 cairo_t* cr = window->GTKPaintContext();
298 wxCHECK_RET(cr, "using wxPaintDC without being in a native paint event");
299 GdkWindow* gdkWindow = gtk_widget_get_window(window->m_wxwindow);
300 m_width = gdk_window_get_width(gdkWindow);
301 m_height = gdk_window_get_height(gdkWindow);
302 cairo_reference(cr);
303 wxGraphicsContext* gc = wxGraphicsContext::CreateFromNative(cr);
304 gc->EnableOffset(true);
305 SetGraphicsContext(gc);
306 }
307 //-----------------------------------------------------------------------------
308
wxScreenDCImpl(wxScreenDC * owner)309 wxScreenDCImpl::wxScreenDCImpl(wxScreenDC* owner)
310 : base_type(owner, 0)
311 {
312 GdkWindow* window = gdk_get_default_root_window();
313 m_width = gdk_window_get_width(window);
314 m_height = gdk_window_get_height(window);
315 cairo_t* cr = gdk_cairo_create(window);
316 wxGraphicsContext* gc = wxGraphicsContext::CreateFromNative(cr);
317 gc->EnableOffset(true);
318 SetGraphicsContext(gc);
319 }
320 //-----------------------------------------------------------------------------
321
wxMemoryDCImpl(wxMemoryDC * owner)322 wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC* owner)
323 : base_type(owner)
324 {
325 m_ok = false;
326 }
327
wxMemoryDCImpl(wxMemoryDC * owner,wxBitmap & bitmap)328 wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC* owner, wxBitmap& bitmap)
329 : base_type(owner, 0)
330 , m_bitmap(bitmap)
331 {
332 Setup();
333 }
334
wxMemoryDCImpl(wxMemoryDC * owner,wxDC *)335 wxMemoryDCImpl::wxMemoryDCImpl(wxMemoryDC* owner, wxDC*)
336 : base_type(owner)
337 {
338 m_ok = false;
339 }
340
DoGetAsBitmap(const wxRect * subrect) const341 wxBitmap wxMemoryDCImpl::DoGetAsBitmap(const wxRect* subrect) const
342 {
343 return subrect ? m_bitmap.GetSubBitmap(*subrect) : m_bitmap;
344 }
345
DoSelect(const wxBitmap & bitmap)346 void wxMemoryDCImpl::DoSelect(const wxBitmap& bitmap)
347 {
348 m_bitmap = bitmap;
349 Setup();
350 }
351
GetSelectedBitmap() const352 const wxBitmap& wxMemoryDCImpl::GetSelectedBitmap() const
353 {
354 return m_bitmap;
355 }
356
GetSelectedBitmap()357 wxBitmap& wxMemoryDCImpl::GetSelectedBitmap()
358 {
359 return m_bitmap;
360 }
361
Setup()362 void wxMemoryDCImpl::Setup()
363 {
364 wxGraphicsContext* gc = NULL;
365 m_ok = m_bitmap.IsOk();
366 if (m_ok)
367 {
368 m_width = m_bitmap.GetWidth();
369 m_height = m_bitmap.GetHeight();
370 cairo_t* cr = m_bitmap.CairoCreate();
371 gc = wxGraphicsContext::CreateFromNative(cr);
372 gc->EnableOffset(true);
373 }
374 SetGraphicsContext(gc);
375 }
376 //-----------------------------------------------------------------------------
377
wxGTKCairoDC(cairo_t * cr)378 wxGTKCairoDC::wxGTKCairoDC(cairo_t* cr)
379 : base_type(new wxGTKCairoDCImpl(this, 0))
380 {
381 cairo_reference(cr);
382 wxGraphicsContext* gc = wxGraphicsContext::CreateFromNative(cr);
383 gc->EnableOffset(true);
384 SetGraphicsContext(gc);
385 }
386
387 #else
388
389 #include "wx/gtk/dc.h"
390
391 //-----------------------------------------------------------------------------
392 // wxGTKDCImpl
393 //-----------------------------------------------------------------------------
394
IMPLEMENT_ABSTRACT_CLASS(wxGTKDCImpl,wxDCImpl)395 IMPLEMENT_ABSTRACT_CLASS(wxGTKDCImpl, wxDCImpl)
396
397 wxGTKDCImpl::wxGTKDCImpl( wxDC *owner )
398 : wxDCImpl( owner )
399 {
400 m_ok = FALSE;
401
402 m_pen = *wxBLACK_PEN;
403 m_font = *wxNORMAL_FONT;
404 m_brush = *wxWHITE_BRUSH;
405 }
406
~wxGTKDCImpl()407 wxGTKDCImpl::~wxGTKDCImpl()
408 {
409 }
410
DoSetClippingRegion(wxCoord x,wxCoord y,wxCoord width,wxCoord height)411 void wxGTKDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
412 {
413 m_clipping = TRUE;
414 m_clipX1 = x;
415 m_clipY1 = y;
416 m_clipX2 = x + width;
417 m_clipY2 = y + height;
418 }
419
420 // ---------------------------------------------------------------------------
421 // get DC capabilities
422 // ---------------------------------------------------------------------------
423
DoGetSizeMM(int * width,int * height) const424 void wxGTKDCImpl::DoGetSizeMM( int* width, int* height ) const
425 {
426 int w = 0;
427 int h = 0;
428 GetOwner()->GetSize( &w, &h );
429 if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) );
430 if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) );
431 }
432
433 // Resolution in pixels per logical inch
GetPPI() const434 wxSize wxGTKDCImpl::GetPPI() const
435 {
436 // TODO (should probably be pure virtual)
437 return wxSize(0, 0);
438 }
439 #endif
440