src/palmos/dc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/palmos/dc.cpp
   3 // Purpose:     wxDC class
   4 // Author:      William Osborne - minimal working wxPalmOS port
   5 // Modified by:
   6 // Created:     10/13/04
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) William Osborne
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #include <string.h>
  21
  22 // For compilers that support precompilation, includes "wx.h".
  23 #include "wx/wxprec.h"
  24
  25 #ifdef __BORLANDC__
  26     #pragma hdrstop
  27 #endif
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/image.h"
  31     #include "wx/window.h"
  32     #include "wx/dc.h"
  33     #include "wx/utils.h"
  34     #include "wx/dialog.h"
  35     #include "wx/app.h"
  36     #include "wx/bitmap.h"
  37     #include "wx/dcmemory.h"
  38     #include "wx/log.h"
  39     #include "wx/icon.h"
  40     #include "wx/dcprint.h"
  41     #include "wx/module.h"
  42 #endif
  43
  44 #include "wx/sysopt.h"
  45 #include "wx/dynlib.h"
  46
  47 #include "wx/palmos/dc.h"
  48
  49 #ifndef AC_SRC_ALPHA
  50     #define AC_SRC_ALPHA 1
  51 #endif
  52
  53 #ifndef LAYOUT_RTL
  54     #define LAYOUT_RTL 1
  55 #endif
  56
  57 /* Quaternary raster codes */
  58 #ifndef MAKEROP4
  59 #define MAKEROP4(fore,back) (DWORD)((((back) << 8) & 0xFF000000) | (fore))
  60 #endif
  61
  62 // apparently with MicroWindows it is possible that HDC is 0 so we have to
  63 // check for this ourselves
  64 #ifdef __WXMICROWIN__
  65     #define WXMICROWIN_CHECK_HDC if ( !GetHDC() ) return;
  66     #define WXMICROWIN_CHECK_HDC_RET(x) if ( !GetHDC() ) return x;
  67 #else
  68     #define WXMICROWIN_CHECK_HDC
  69     #define WXMICROWIN_CHECK_HDC_RET(x)
  70 #endif
  71
  72 IMPLEMENT_ABSTRACT_CLASS(wxPalmDCImpl, wxDCImpl)
  73
  74 // ---------------------------------------------------------------------------
  75 // constants
  76 // ---------------------------------------------------------------------------
  77
  78 // ROPs which don't have standard names (see "Ternary Raster Operations" in the
  79 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
  80 #define DSTCOPY 0x00AA0029      // a.k.a. NOP operation
  81
  82 // ----------------------------------------------------------------------------
  83 // macros for logical <-> device coords conversion
  84 // ----------------------------------------------------------------------------
  85
  86 /*
  87    We currently let Windows do all the translations itself so these macros are
  88    not really needed (any more) but keep them to enhance readability of the
  89    code by allowing to see where are the logical and where are the device
  90    coordinates used.
  91  */
  92
  93 #ifdef __WXWINCE__
  94     #define XLOG2DEV(x) ((x-m_logicalOriginX)*m_signX)
  95     #define YLOG2DEV(y) ((y-m_logicalOriginY)*m_signY)
  96     #define XDEV2LOG(x) ((x)*m_signX+m_logicalOriginX)
  97     #define YDEV2LOG(y) ((y)*m_signY+m_logicalOriginY)
  98 #else
  99     #define XLOG2DEV(x) (x)
 100     #define YLOG2DEV(y) (y)
 101     #define XDEV2LOG(x) (x)
 102     #define YDEV2LOG(y) (y)
 103 #endif
 104
 105 // ---------------------------------------------------------------------------
 106 // private functions
 107 // ---------------------------------------------------------------------------
 108
 109 // ----------------------------------------------------------------------------
 110 // private classes
 111 // ----------------------------------------------------------------------------
 112
 113 #if wxUSE_DYNLIB_CLASS
 114
 115 // helper class to cache dynamically loaded libraries and not attempt reloading
 116 // them if it fails
 117 class wxOnceOnlyDLLLoader
 118 {
 119 public:
 120     // ctor argument must be a literal string as we don't make a copy of it!
 121     wxOnceOnlyDLLLoader(const wxChar *dllName)
 122         : m_dllName(dllName)
 123     {
 124     }
 125
 126
 127     // return the symbol with the given name or NULL if the DLL not loaded
 128     // or symbol not present
 129     void *GetSymbol(const wxChar *name)
 130     {
 131         // we're prepared to handle errors here
 132         wxLogNull noLog;
 133
 134         if ( m_dllName )
 135         {
 136             m_dll.Load(m_dllName);
 137
 138             // reset the name whether we succeeded or failed so that we don't
 139             // try again the next time
 140             m_dllName = NULL;
 141         }
 142
 143         return m_dll.IsLoaded() ? m_dll.GetSymbol(name) : NULL;
 144     }
 145
 146     void Unload()
 147     {
 148         if ( m_dll.IsLoaded() )
 149         {
 150             m_dll.Unload();
 151         }
 152     }
 153
 154 private:
 155     wxDynamicLibrary m_dll;
 156     const wxChar *m_dllName;
 157 };
 158
 159 #endif // wxUSE_DYNLIB_CLASS
 160
 161 // ===========================================================================
 162 // implementation
 163 // ===========================================================================
 164
 165 // ---------------------------------------------------------------------------
 166 // wxPalmDCImpl
 167 // ---------------------------------------------------------------------------
 168
 169 wxPalmDCImpl::wxPalmDCImpl( wxDC *owner, WXHDC hDC ) :
 170     wxDCImpl( owner )
 171 {
 172     Init();
 173     m_hDC = hDC;
 174 }
 175
 176 wxPalmDCImpl::~wxPalmDCImpl()
 177 {
 178 }
 179
 180 // This will select current objects out of the DC,
 181 // which is what you have to do before deleting the
 182 // DC.
 183 void wxPalmDCImpl::SelectOldObjects(WXHDC dc)
 184 {
 185 }
 186
 187 // ---------------------------------------------------------------------------
 188 // clipping
 189 // ---------------------------------------------------------------------------
 190
 191 void wxPalmDCImpl::UpdateClipBox()
 192 {
 193 }
 194
 195 void
 196 wxPalmDCImpl::DoGetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
 197 {
 198 }
 199
 200 void wxPalmDCImpl::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 201 {
 202 }
 203
 204 void wxPalmDCImpl::DoSetDeviceClippingRegion(const wxRegion& region)
 205 {
 206 }
 207
 208 void wxPalmDCImpl::DestroyClippingRegion()
 209 {
 210 }
 211
 212 // ---------------------------------------------------------------------------
 213 // query capabilities
 214 // ---------------------------------------------------------------------------
 215
 216 bool wxPalmDCImpl::CanDrawBitmap() const
 217 {
 218     return false;
 219 }
 220
 221 bool wxPalmDCImpl::CanGetTextExtent() const
 222 {
 223     return false;
 224 }
 225
 226 int wxPalmDCImpl::GetDepth() const
 227 {
 228     return 0;
 229 }
 230
 231 // ---------------------------------------------------------------------------
 232 // drawing
 233 // ---------------------------------------------------------------------------
 234
 235 void wxPalmDCImpl::Clear()
 236 {
 237 }
 238
 239 bool wxPalmDCImpl::DoFloodFill(wxCoord WXUNUSED_IN_WINCE(x),
 240                        wxCoord WXUNUSED_IN_WINCE(y),
 241                        const wxColour& WXUNUSED_IN_WINCE(col),
 242                        int WXUNUSED_IN_WINCE(style))
 243 {
 244     return false;
 245 }
 246
 247 bool wxPalmDCImpl::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 248 {
 249     return false;
 250 }
 251
 252 void wxPalmDCImpl::DoCrossHair(wxCoord x, wxCoord y)
 253 {
 254 }
 255
 256 void wxPalmDCImpl::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 257 {
 258 }
 259
 260 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
 261 // and ending at (x2, y2)
 262 void wxPalmDCImpl::DoDrawArc(wxCoord x1, wxCoord y1,
 263                      wxCoord x2, wxCoord y2,
 264                      wxCoord xc, wxCoord yc)
 265 {
 266 }
 267
 268 void wxPalmDCImpl::DoDrawCheckMark(wxCoord x1, wxCoord y1,
 269                            wxCoord width, wxCoord height)
 270 {
 271 }
 272
 273 void wxPalmDCImpl::DoDrawPoint(wxCoord x, wxCoord y)
 274 {
 275 }
 276
 277 void wxPalmDCImpl::DoDrawPolygon(int n,
 278                          wxPoint points[],
 279                          wxCoord xoffset,
 280                          wxCoord yoffset,
 281                          int WXUNUSED_IN_WINCE(fillStyle))
 282 {
 283 }
 284
 285 void
 286 wxPalmDCImpl::DoDrawPolyPolygon(int n,
 287                         int count[],
 288                         wxPoint points[],
 289                         wxCoord xoffset,
 290                         wxCoord yoffset,
 291                         int fillStyle)
 292 {
 293 }
 294
 295 void wxPalmDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
 296 {
 297 }
 298
 299 void wxPalmDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 300 {
 301 }
 302
 303 void wxPalmDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 304 {
 305 }
 306
 307 void wxPalmDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 308 {
 309 }
 310
 311 #if wxUSE_SPLINES
 312 void wxPalmDCImpl::DoDrawSpline(const wxPointList *points)
 313 {
 314 }
 315 #endif
 316
 317 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
 318 void wxPalmDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 319 {
 320 }
 321
 322 void wxPalmDCImpl::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 323 {
 324 }
 325
 326 void wxPalmDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
 327 {
 328 }
 329
 330 void wxPalmDCImpl::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 331 {
 332 }
 333
 334 void wxPalmDCImpl::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
 335 {
 336 }
 337
 338 void wxPalmDCImpl::DoDrawRotatedText(const wxString& text,
 339                              wxCoord x, wxCoord y,
 340                              double angle)
 341 {
 342 }
 343
 344 // ---------------------------------------------------------------------------
 345 // set GDI objects
 346 // ---------------------------------------------------------------------------
 347
 348 #if wxUSE_PALETTE
 349
 350 void wxPalmDCImpl::DoSelectPalette(bool realize)
 351 {
 352 }
 353
 354 void wxPalmDCImpl::SetPalette(const wxPalette& palette)
 355 {
 356 }
 357
 358 void wxPalmDCImpl::InitializePalette()
 359 {
 360 }
 361
 362 #endif // wxUSE_PALETTE
 363
 364 // SetFont/Pen/Brush() really ask to be implemented as a single template
 365 // function... but doing it is not worth breaking OpenWatcom build <sigh>
 366
 367 void wxPalmDCImpl::SetFont(const wxFont& font)
 368 {
 369 }
 370
 371 void wxPalmDCImpl::SetPen(const wxPen& pen)
 372 {
 373 }
 374
 375 void wxPalmDCImpl::SetBrush(const wxBrush& brush)
 376 {
 377 }
 378
 379 void wxPalmDCImpl::SetBackground(const wxBrush& brush)
 380 {
 381 }
 382
 383 void wxPalmDCImpl::SetBackgroundMode(int mode)
 384 {
 385 }
 386
 387 void wxPalmDCImpl::SetLogicalFunction(int function)
 388 {
 389 }
 390
 391 void wxPalmDCImpl::SetRop(WXHDC dc)
 392 {
 393 }
 394
 395 bool wxPalmDCImpl::StartDoc(const wxString& WXUNUSED(message))
 396 {
 397     // We might be previewing, so return true to let it continue.
 398     return true;
 399 }
 400
 401 void wxPalmDCImpl::EndDoc()
 402 {
 403 }
 404
 405 void wxPalmDCImpl::StartPage()
 406 {
 407 }
 408
 409 void wxPalmDCImpl::EndPage()
 410 {
 411 }
 412
 413 // ---------------------------------------------------------------------------
 414 // text metrics
 415 // ---------------------------------------------------------------------------
 416
 417 wxCoord wxPalmDCImpl::GetCharHeight() const
 418 {
 419     return 0;
 420 }
 421
 422 wxCoord wxPalmDCImpl::GetCharWidth() const
 423 {
 424     return 0;
 425 }
 426
 427 void wxPalmDCImpl::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 428                            wxCoord *descent, wxCoord *externalLeading,
 429                            const wxFont *font) const
 430 {
 431 }
 432
 433
 434 // Each element of the array will be the width of the string up to and
 435 // including the coresoponding character in text.
 436
 437 bool wxPalmDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 438 {
 439     return false;
 440 }
 441
 442 void wxPalmDCImpl::RealizeScaleAndOrigin()
 443 {
 444 }
 445
 446 void wxPalmDCImpl::SetMapMode(int mode)
 447 {
 448 }
 449
 450 void wxPalmDCImpl::SetUserScale(double x, double y)
 451 {
 452 }
 453
 454 void wxPalmDCImpl::SetAxisOrientation(bool xLeftRight,
 455                               bool yBottomUp)
 456 {
 457 }
 458
 459 void wxPalmDCImpl::SetLogicalOrigin(wxCoord x, wxCoord y)
 460 {
 461 }
 462
 463 void wxPalmDCImpl::SetDeviceOrigin(wxCoord x, wxCoord y)
 464 {
 465 }
 466
 467 // ---------------------------------------------------------------------------
 468 // bit blit
 469 // ---------------------------------------------------------------------------
 470
 471 bool wxPalmDCImpl::DoBlit(wxCoord dstX, wxCoord dstY,
 472                   wxCoord dstWidth, wxCoord dstHeight,
 473                   wxDC *source,
 474                   wxCoord srcX, wxCoord srcY,
 475                   int rop, bool useMask,
 476                   wxCoord srcMaskX, wxCoord srcMaskY)
 477 {
 478     return false;
 479 }
 480
 481 bool wxPalmDCImpl::DoStretchBlit(wxCoord xdest, wxCoord ydest,
 482                          wxCoord dstWidth, wxCoord dstHeight,
 483                          wxDC *source,
 484                          wxCoord xsrc, wxCoord ysrc,
 485                          wxCoord srcWidth, wxCoord srcHeight,
 486                          int rop, bool useMask,
 487                          wxCoord xsrcMask, wxCoord ysrcMask)
 488 {
 489     return false;
 490 }
 491
 492 void wxPalmDCImpl::GetDeviceSize(int *width, int *height) const
 493 {
 494 }
 495
 496 void wxPalmDCImpl::DoGetSizeMM(int *w, int *h) const
 497 {
 498 }
 499
 500 wxSize wxPalmDCImpl::GetPPI() const
 501 {
 502     return wxSize(0, 0);
 503 }
 504
 505 // For use by wxWidgets only, unless custom units are required.
 506 void wxPalmDCImpl::SetLogicalScale(double x, double y)
 507 {
 508 }
 509
 510 // ----------------------------------------------------------------------------
 511 // DC caching
 512 // ----------------------------------------------------------------------------
 513
 514 #if wxUSE_DC_CACHEING
 515
 516 /*
 517  * This implementation is a bit ugly and uses the old-fashioned wxList class, so I will
 518  * improve it in due course, either using arrays, or simply storing pointers to one
 519  * entry for the bitmap, and two for the DCs. -- JACS
 520  */
 521
 522 wxObjectList wxPalmDCImpl::sm_bitmapCache;
 523 wxObjectList wxPalmDCImpl::sm_dcCache;
 524
 525 wxDCCacheEntry::wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth)
 526 {
 527     m_bitmap = hBitmap;
 528     m_dc = 0;
 529     m_width = w;
 530     m_height = h;
 531     m_depth = depth;
 532 }
 533
 534 wxDCCacheEntry::wxDCCacheEntry(WXHDC hDC, int depth)
 535 {
 536 }
 537
 538 wxDCCacheEntry::~wxDCCacheEntry()
 539 {
 540 }
 541
 542 wxDCCacheEntry* wxPalmDCImpl::FindBitmapInCache(WXHDC dc, int w, int h)
 543 {
 544     return NULL;
 545 }
 546
 547 wxDCCacheEntry* wxPalmDCImpl::FindDCInCache(wxDCCacheEntry* notThis, WXHDC dc)
 548 {
 549     return NULL;
 550 }
 551
 552 void wxPalmDCImpl::AddToBitmapCache(wxDCCacheEntry* entry)
 553 {
 554 }
 555
 556 void wxPalmDCImpl::AddToDCCache(wxDCCacheEntry* entry)
 557 {
 558 }
 559
 560 void wxPalmDCImpl::ClearCache()
 561 {
 562 }
 563
 564 // Clean up cache at app exit
 565 class wxDCModule : public wxModule
 566 {
 567 public:
 568     virtual bool OnInit() { return true; }
 569     virtual void OnExit() { wxPalmDCImpl::ClearCache(); }
 570
 571 private:
 572     DECLARE_DYNAMIC_CLASS(wxDCModule)
 573 };
 574
 575 IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
 576
 577 #endif // wxUSE_DC_CACHEING
 578
 579 void wxPalmDCImpl::DoGradientFillLinear (const wxRect& rect,
 580                                  const wxColour& initialColour,
 581                                  const wxColour& destColour,
 582                                  wxDirection nDirection)
 583 {
 584 }
 585
 586 #if wxUSE_DYNLIB_CLASS
 587
 588 wxLayoutDirection wxPalmDCImpl::GetLayoutDirection() const
 589 {
 590     DWORD layout = wxGetDCLayout(GetHdc());
 591
 592     if ( layout == (DWORD)-1 )
 593         return wxLayout_Default;
 594
 595     return layout & LAYOUT_RTL ? wxLayout_RightToLeft : wxLayout_LeftToRight;
 596 }
 597
 598 void wxPalmDCImpl::SetLayoutDirection(wxLayoutDirection dir)
 599 {
 600 }
 601
 602 #else // !wxUSE_DYNLIB_CLASS
 603
 604 // we can't provide RTL support without dynamic loading, so stub it out
 605 wxLayoutDirection wxPalmDCImpl::GetLayoutDirection() const
 606 {
 607     return wxLayout_Default;
 608 }
 609
 610 void wxPalmDCImpl::SetLayoutDirection(wxLayoutDirection WXUNUSED(dir))
 611 {
 612 }
 613
 614 #endif // wxUSE_DYNLIB_CLASS/!wxUSE_DYNLIB_CLASS