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git.saurik.com Git - wxWidgets.git/blob - src/html/m_image.cpp
1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxHtml module for displaying images
4 // Author: Vaclav Slavik
6 // Copyright: (c) 1999 Vaclav Slavik, Joel Lucsy
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
10 #include "wx/wxprec.h"
13 #if wxUSE_HTML && wxUSE_STREAMS
21 #include "wx/scrolwin.h"
23 #include "wx/dcmemory.h"
26 #include "wx/html/forcelnk.h"
27 #include "wx/html/m_templ.h"
28 #include "wx/html/htmlwin.h"
31 #include "wx/gifdecod.h"
32 #include "wx/dynarray.h"
34 #include "wx/artprov.h"
39 FORCE_LINK_ME(m_image
)
44 WX_DECLARE_OBJARRAY(int, CoordArray
);
45 #include "wx/arrimpl.cpp" // this is a magic incantation which must be done!
46 WX_DEFINE_OBJARRAY(CoordArray
)
49 // ---------------------------------------------------------------------------
50 // wxHtmlImageMapAreaCell
51 // 0-width, 0-height cell that represents single area in
52 // imagemap (it's GetLink is called from wxHtmlImageCell's)
53 // ---------------------------------------------------------------------------
55 class wxHtmlImageMapAreaCell
: public wxHtmlCell
58 enum celltype
{ CIRCLE
, RECT
, POLY
};
64 wxHtmlImageMapAreaCell( celltype t
, wxString
&coords
, double pixel_scale
= 1.0);
65 virtual wxHtmlLinkInfo
*GetLink( int x
= 0, int y
= 0 ) const;
66 void Draw(wxDC
& WXUNUSED(dc
),
67 int WXUNUSED(x
), int WXUNUSED(y
),
68 int WXUNUSED(view_y1
), int WXUNUSED(view_y2
),
69 wxHtmlRenderingInfo
& WXUNUSED(info
)) {}
72 DECLARE_NO_COPY_CLASS(wxHtmlImageMapAreaCell
)
79 wxHtmlImageMapAreaCell::wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::celltype t
, wxString
&incoords
, double pixel_scale
)
82 wxString x
= incoords
, y
;
85 while ((i
= x
.Find( ',' )) != wxNOT_FOUND
)
87 coords
.Add( (int)(pixel_scale
* (double)wxAtoi( x
.Left( i
).c_str())) );
90 coords
.Add( (int)(pixel_scale
* (double)wxAtoi( x
.c_str())) );
93 wxHtmlLinkInfo
*wxHtmlImageMapAreaCell::GetLink( int x
, int y
) const
105 if (x
>= l
&& x
<= r
&& y
>= t
&& y
<= b
)
119 d
= sqrt( (double) (((x
- l
) * (x
- l
)) + ((y
- t
) * (y
- t
))) );
128 if (coords
.GetCount() >= 6)
133 int totalv
= coords
.GetCount() / 2;
134 int totalc
= totalv
* 2;
135 int xval
= coords
[totalc
- 2];
136 int yval
= coords
[totalc
- 1];
140 if ((yval
>= wherey
) != (coords
[pointer
] >= wherey
))
142 if ((xval
>= wherex
) == (coords
[0] >= wherex
))
144 intersects
+= (xval
>= wherex
) ? 1 : 0;
148 intersects
+= ((xval
- (yval
- wherey
) *
150 (coords
[pointer
] - yval
)) >= wherex
) ? 1 : 0;
154 while (pointer
< end
)
156 yval
= coords
[pointer
];
160 while ((pointer
< end
) && (coords
[pointer
] >= wherey
))
168 if ((coords
[pointer
- 3] >= wherex
) ==
169 (coords
[pointer
- 1] >= wherex
)) {
170 intersects
+= (coords
[pointer
- 3] >= wherex
) ? 1 : 0;
175 ((coords
[pointer
- 3] - (coords
[pointer
- 2] - wherey
) *
176 (coords
[pointer
- 1] - coords
[pointer
- 3]) /
177 (coords
[pointer
] - coords
[pointer
- 2])) >= wherex
) ? 1 : 0;
182 while ((pointer
< end
) && (coords
[pointer
] < wherey
))
190 if ((coords
[pointer
- 3] >= wherex
) ==
191 (coords
[pointer
- 1] >= wherex
))
193 intersects
+= (coords
[pointer
- 3] >= wherex
) ? 1 : 0;
198 ((coords
[pointer
- 3] - (coords
[pointer
- 2] - wherey
) *
199 (coords
[pointer
- 1] - coords
[pointer
- 3]) /
200 (coords
[pointer
] - coords
[pointer
- 2])) >= wherex
) ? 1 : 0;
204 if ((intersects
& 1) != 0)
215 wxHtmlImageMapAreaCell
*a
= (wxHtmlImageMapAreaCell
*)m_Next
;
216 return a
->GetLink( x
, y
);
228 //--------------------------------------------------------------------------------
229 // wxHtmlImageMapCell
230 // 0-width, 0-height cell that represents map from imagemaps
231 // it is always placed before wxHtmlImageMapAreaCells
232 // It responds to Find(wxHTML_COND_ISIMAGEMAP)
233 //--------------------------------------------------------------------------------
236 class wxHtmlImageMapCell
: public wxHtmlCell
239 wxHtmlImageMapCell( wxString
&name
);
243 virtual wxHtmlLinkInfo
*GetLink( int x
= 0, int y
= 0 ) const;
244 virtual const wxHtmlCell
*Find( int cond
, const void *param
) const;
245 void Draw(wxDC
& WXUNUSED(dc
),
246 int WXUNUSED(x
), int WXUNUSED(y
),
247 int WXUNUSED(view_y1
), int WXUNUSED(view_y2
),
248 wxHtmlRenderingInfo
& WXUNUSED(info
)) {}
250 DECLARE_NO_COPY_CLASS(wxHtmlImageMapCell
)
254 wxHtmlImageMapCell::wxHtmlImageMapCell( wxString
&name
)
259 wxHtmlLinkInfo
*wxHtmlImageMapCell::GetLink( int x
, int y
) const
261 wxHtmlImageMapAreaCell
*a
= (wxHtmlImageMapAreaCell
*)m_Next
;
263 return a
->GetLink( x
, y
);
264 return wxHtmlCell::GetLink( x
, y
);
267 const wxHtmlCell
*wxHtmlImageMapCell::Find( int cond
, const void *param
) const
269 if (cond
== wxHTML_COND_ISIMAGEMAP
)
271 if (m_Name
== *((wxString
*)(param
)))
274 return wxHtmlCell::Find(cond
, param
);
281 //--------------------------------------------------------------------------------
284 //--------------------------------------------------------------------------------
286 class wxHtmlImageCell
: public wxHtmlCell
289 wxHtmlImageCell(wxHtmlWindowInterface
*windowIface
,
290 wxFSFile
*input
, int w
= wxDefaultCoord
, int h
= wxDefaultCoord
,
291 double scale
= 1.0, int align
= wxHTML_ALIGN_BOTTOM
,
292 const wxString
& mapname
= wxEmptyString
);
294 void Draw(wxDC
& dc
, int x
, int y
, int view_y1
, int view_y2
,
295 wxHtmlRenderingInfo
& info
);
296 virtual wxHtmlLinkInfo
*GetLink(int x
= 0, int y
= 0) const;
298 void SetImage(const wxImage
& img
);
299 #if wxUSE_GIF && wxUSE_TIMER
300 void AdvanceAnimation(wxTimer
*timer
);
301 virtual void Layout(int w
);
308 wxHtmlWindowInterface
*m_windowIface
;
309 #if wxUSE_GIF && wxUSE_TIMER
310 wxGIFDecoder
*m_gifDecoder
;
312 int m_physX
, m_physY
;
315 wxHtmlImageMapCell
*m_imageMap
;
318 DECLARE_NO_COPY_CLASS(wxHtmlImageCell
)
321 #if wxUSE_GIF && wxUSE_TIMER
322 class wxGIFTimer
: public wxTimer
325 wxGIFTimer(wxHtmlImageCell
*cell
) : m_cell(cell
) {}
326 virtual void Notify()
328 m_cell
->AdvanceAnimation(this);
332 wxHtmlImageCell
*m_cell
;
334 DECLARE_NO_COPY_CLASS(wxGIFTimer
)
339 //----------------------------------------------------------------------------
341 //----------------------------------------------------------------------------
344 wxHtmlImageCell::wxHtmlImageCell(wxHtmlWindowInterface
*windowIface
,
346 int w
, int h
, double scale
, int align
,
347 const wxString
& mapname
) : wxHtmlCell()
349 m_windowIface
= windowIface
;
357 SetCanLiveOnPagebreak(false);
358 #if wxUSE_GIF && wxUSE_TIMER
361 m_physX
= m_physY
= wxDefaultCoord
;
364 if ( m_bmpW
&& m_bmpH
)
368 wxInputStream
*s
= input
->GetStream();
372 #if wxUSE_GIF && wxUSE_TIMER
374 if ( m_windowIface
&&
375 (input
->GetLocation().Matches(wxT("*.gif")) ||
376 input
->GetLocation().Matches(wxT("*.GIF"))) )
378 m_gifDecoder
= new wxGIFDecoder(s
, true);
379 if ( m_gifDecoder
->ReadGIF() == wxGIF_OK
)
382 if ( m_gifDecoder
->ConvertToImage(&img
) )
387 if ( m_gifDecoder
->IsAnimation() )
389 m_gifTimer
= new wxGIFTimer(this);
390 m_gifTimer
->Start(m_gifDecoder
->GetDelay(), true);
394 wxDELETE(m_gifDecoder
);
399 wxDELETE(m_gifDecoder
);
404 #endif // wxUSE_GIF && wxUSE_TIMER
406 wxImage
image(*s
, wxBITMAP_TYPE_ANY
);
412 else // input==NULL, use "broken image" bitmap
414 if ( m_bmpW
== wxDefaultCoord
&& m_bmpH
== wxDefaultCoord
)
422 if ( m_bmpW
== wxDefaultCoord
) m_bmpW
= 31;
423 if ( m_bmpH
== wxDefaultCoord
) m_bmpH
= 33;
426 new wxBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE
));
429 //else: ignore the 0-sized images used sometimes on the Web pages
431 m_Width
= (int)(scale
* (double)m_bmpW
);
432 m_Height
= (int)(scale
* (double)m_bmpH
);
436 case wxHTML_ALIGN_TOP
:
437 m_Descent
= m_Height
;
439 case wxHTML_ALIGN_CENTER
:
440 m_Descent
= m_Height
/ 2;
442 case wxHTML_ALIGN_BOTTOM
:
449 void wxHtmlImageCell::SetImage(const wxImage
& img
)
451 #if !defined(__WXMSW__) || wxUSE_WXDIB
458 hh
= img
.GetHeight();
460 if ( m_bmpW
== wxDefaultCoord
)
462 if ( m_bmpH
== wxDefaultCoord
)
465 // Only scale the bitmap at the rendering stage,
466 // so we don't lose quality twice
468 if ((m_bmpW != ww) || (m_bmpH != hh))
470 wxImage img2 = img.Scale(m_bmpW, m_bmpH);
471 m_bitmap = new wxBitmap(img2);
475 m_bitmap
= new wxBitmap(img
);
480 #if wxUSE_GIF && wxUSE_TIMER
481 void wxHtmlImageCell::AdvanceAnimation(wxTimer
*timer
)
485 m_gifDecoder
->GoNextFrame(true);
487 if ( m_physX
== wxDefaultCoord
)
489 m_physX
= m_physY
= 0;
490 for (wxHtmlCell
*cell
= this; cell
; cell
= cell
->GetParent())
492 m_physX
+= cell
->GetPosX();
493 m_physY
+= cell
->GetPosY();
497 wxWindow
*win
= m_windowIface
->GetHTMLWindow();
499 m_windowIface
->HTMLCoordsToWindow(this, wxPoint(m_physX
, m_physY
));
500 wxRect
rect(pos
, wxSize(m_Width
, m_Height
));
502 if ( win
->GetClientRect().Intersects(rect
) &&
503 m_gifDecoder
->ConvertToImage(&img
) )
505 #if !defined(__WXMSW__) || wxUSE_WXDIB
506 if ( (int)m_gifDecoder
->GetWidth() != m_Width
||
507 (int)m_gifDecoder
->GetHeight() != m_Height
||
508 m_gifDecoder
->GetLeft() != 0 || m_gifDecoder
->GetTop() != 0 )
512 dc
.SelectObject(*m_bitmap
);
513 dc
.DrawBitmap(bmp
, m_gifDecoder
->GetLeft(), m_gifDecoder
->GetTop(),
514 true /* use mask */);
519 win
->Refresh(img
.HasMask(), &rect
);
522 timer
->Start(m_gifDecoder
->GetDelay(), true);
525 void wxHtmlImageCell::Layout(int w
)
527 wxHtmlCell::Layout(w
);
528 m_physX
= m_physY
= wxDefaultCoord
;
533 wxHtmlImageCell::~wxHtmlImageCell()
536 #if wxUSE_GIF && wxUSE_TIMER
543 void wxHtmlImageCell::Draw(wxDC
& dc
, int x
, int y
,
544 int WXUNUSED(view_y1
), int WXUNUSED(view_y2
),
545 wxHtmlRenderingInfo
& WXUNUSED(info
))
549 dc
.SetBrush(*wxTRANSPARENT_BRUSH
);
550 dc
.SetPen(*wxBLACK_PEN
);
551 dc
.DrawRectangle(x
+ m_PosX
, y
+ m_PosY
, m_Width
, m_Height
);
556 // We add in the scaling from the desired bitmap width
557 // and height, so we only do the scaling once.
558 double imageScaleX
= 1.0;
559 double imageScaleY
= 1.0;
560 if (m_bmpW
!= m_bitmap
->GetWidth())
561 imageScaleX
= (double) m_bmpW
/ (double) m_bitmap
->GetWidth();
562 if (m_bmpH
!= m_bitmap
->GetHeight())
563 imageScaleY
= (double) m_bmpH
/ (double) m_bitmap
->GetHeight();
566 dc
.GetUserScale(&us_x
, &us_y
);
567 dc
.SetUserScale(us_x
* m_scale
* imageScaleX
, us_y
* m_scale
* imageScaleY
);
569 dc
.DrawBitmap(*m_bitmap
, (int) ((x
+ m_PosX
) / (m_scale
*imageScaleX
)),
570 (int) ((y
+ m_PosY
) / (m_scale
*imageScaleY
)), true);
571 dc
.SetUserScale(us_x
, us_y
);
575 wxHtmlLinkInfo
*wxHtmlImageCell::GetLink( int x
, int y
) const
577 if (m_mapName
.empty())
578 return wxHtmlCell::GetLink( x
, y
);
581 wxHtmlContainerCell
*p
, *op
;
582 op
= p
= GetParent();
589 wxHtmlCell
*cell
= (wxHtmlCell
*)p
->Find(wxHTML_COND_ISIMAGEMAP
,
590 (const void*)(&m_mapName
));
593 ((wxString
&)m_mapName
).Clear();
594 return wxHtmlCell::GetLink( x
, y
);
596 { // dirty hack, ask Joel why he fills m_ImageMap in this place
597 // THE problem is that we're in const method and we can't modify m_ImageMap
598 wxHtmlImageMapCell
**cx
= (wxHtmlImageMapCell
**)(&m_imageMap
);
599 *cx
= (wxHtmlImageMapCell
*)cell
;
602 return m_imageMap
->GetLink(x
, y
);
607 //--------------------------------------------------------------------------------
609 //--------------------------------------------------------------------------------
611 TAG_HANDLER_BEGIN(IMG
, "IMG,MAP,AREA")
612 TAG_HANDLER_CONSTR(IMG
) { }
614 TAG_HANDLER_PROC(tag
)
616 if (tag
.GetName() == wxT("IMG"))
618 if (tag
.HasParam(wxT("SRC")))
620 int w
= wxDefaultCoord
, h
= wxDefaultCoord
;
623 wxString tmp
= tag
.GetParam(wxT("SRC"));
624 wxString mn
= wxEmptyString
;
626 str
= m_WParser
->OpenURL(wxHTML_URL_IMAGE
, tmp
);
628 if (tag
.HasParam(wxT("WIDTH")))
629 tag
.GetParamAsInt(wxT("WIDTH"), &w
);
630 if (tag
.HasParam(wxT("HEIGHT")))
631 tag
.GetParamAsInt(wxT("HEIGHT"), &h
);
632 al
= wxHTML_ALIGN_BOTTOM
;
633 if (tag
.HasParam(wxT("ALIGN")))
635 wxString alstr
= tag
.GetParam(wxT("ALIGN"));
636 alstr
.MakeUpper(); // for the case alignment was in ".."
637 if (alstr
== wxT("TEXTTOP"))
638 al
= wxHTML_ALIGN_TOP
;
639 else if ((alstr
== wxT("CENTER")) || (alstr
== wxT("ABSCENTER")))
640 al
= wxHTML_ALIGN_CENTER
;
642 if (tag
.HasParam(wxT("USEMAP")))
644 mn
= tag
.GetParam( wxT("USEMAP") );
645 if (mn
.GetChar(0) == wxT('#'))
650 wxHtmlImageCell
*cel
= new wxHtmlImageCell(
651 m_WParser
->GetWindowInterface(),
653 m_WParser
->GetPixelScale(),
655 m_WParser
->ApplyStateToCell(cel
);
656 cel
->SetId(tag
.GetParam(wxT("id"))); // may be empty
657 m_WParser
->GetContainer()->InsertCell(cel
);
662 if (tag
.GetName() == wxT("MAP"))
664 m_WParser
->CloseContainer();
665 m_WParser
->OpenContainer();
666 if (tag
.HasParam(wxT("NAME")))
668 wxString tmp
= tag
.GetParam(wxT("NAME"));
669 wxHtmlImageMapCell
*cel
= new wxHtmlImageMapCell( tmp
);
670 m_WParser
->GetContainer()->InsertCell( cel
);
673 m_WParser
->CloseContainer();
674 m_WParser
->OpenContainer();
676 if (tag
.GetName() == wxT("AREA"))
678 if (tag
.HasParam(wxT("SHAPE")))
680 wxString tmp
= tag
.GetParam(wxT("SHAPE"));
681 wxString coords
= wxEmptyString
;
683 wxHtmlImageMapAreaCell
*cel
= NULL
;
684 if (tag
.HasParam(wxT("COORDS")))
686 coords
= tag
.GetParam(wxT("COORDS"));
688 if (tmp
== wxT("POLY"))
690 cel
= new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::POLY
, coords
, m_WParser
->GetPixelScale() );
692 else if (tmp
== wxT("CIRCLE"))
694 cel
= new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::CIRCLE
, coords
, m_WParser
->GetPixelScale() );
696 else if (tmp
== wxT("RECT"))
698 cel
= new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::RECT
, coords
, m_WParser
->GetPixelScale() );
700 if (cel
!= NULL
&& tag
.HasParam(wxT("HREF")))
703 if (tag
.HasParam(wxT("TARGET")))
704 target
= tag
.GetParam(wxT("TARGET"));
705 cel
->SetLink(wxHtmlLinkInfo(tag
.GetParam(wxT("HREF")), target
));
708 m_WParser
->GetContainer()->InsertCell( cel
);
719 TAGS_MODULE_BEGIN(Image
)
723 TAGS_MODULE_END(Image
)