rom/graphics/clipblit.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Copy content of a rastport to another rastport
   6     Lang: english
   7 */
   8 #include <exec/memory.h>
   9 #include <graphics/gfx.h>
  10 #include <proto/exec.h>
  11 #include <proto/layers.h>
  12 #include "graphics_intern.h"
  13 #include <graphics/regions.h>
  14 #include <graphics/layers.h>
  15 #include <graphics/clip.h>
  16 #include "gfxfuncsupport.h"
  17
  18 #include <aros/debug.h>
  19
  20 #define NEW_INTERNAL_CLIPBLIT 1
  21
  22 #define LayersBase (struct LayersBase *)(GfxBase->gb_LayersBase)
  23
  24 /*****************************************************************************
  25
  26     NAME */
  27 #include <proto/graphics.h>
  28
  29         AROS_LH9(void, ClipBlit,
  30
  31 /*  SYNOPSIS */
  32         AROS_LHA(struct RastPort *, srcRP , A0),
  33         AROS_LHA(LONG             , xSrc  , D0),
  34         AROS_LHA(LONG             , ySrc  , D1),
  35         AROS_LHA(struct RastPort *, destRP, A1),
  36         AROS_LHA(LONG             , xDest , D2),
  37         AROS_LHA(LONG             , yDest , D3),
  38         AROS_LHA(LONG             , xSize , D4),
  39         AROS_LHA(LONG             , ySize , D5),
  40         AROS_LHA(UBYTE            , minterm, D6),
  41
  42 /*  LOCATION */
  43         struct GfxBase *, GfxBase, 92, Graphics)
  44
  45 /*  FUNCTION
  46         Copies the contents of one rastport to another rastport.
  47         Takes care of layered and non-layered source and destination
  48         rastports.
  49         If you have a window you should always use this function instead
  50         of BltBitMap().
  51
  52     INPUTS
  53         srcRP        - Copy from this RastPort.
  54         xSrc, ySrc   - This is the upper left corner of the area to copy.
  55         destRP       - Copy to this RastPort.
  56         xDest, yDest - Upper left corner where to place the copy
  57         xSize, ySize - The size of the area to copy
  58         minterm - How to copy. Most useful values are 0x00C0 for a vanilla
  59                 copy, 0x0030 to invert the source and then copy or 0x0050
  60                 to ignore the source and just invert the destination. If
  61                 you want to calculate other values, then you must know that
  62                 channel A is set, if you are inside the rectangle, channel
  63                 B is the source and channel C is the destination of the
  64                 rectangle.
  65
  66                 Bit     ABC
  67                  0      000
  68                  1      001
  69                  2      010
  70                  3      011
  71                  4      100
  72                  5      101
  73                  6      110
  74                  7      111
  75
  76                 So 0x00C0 means: D is set if one is inside the rectangle
  77                 (A is set) and B (the source) is set and cleared otherwise.
  78
  79                 To fill the rectangle, you would want to set D when A is
  80                 set, so the value is 0x00F0.
  81
  82
  83
  84     RESULT
  85         None
  86
  87     NOTES
  88
  89     EXAMPLE
  90
  91     BUGS
  92
  93     SEE ALSO
  94         BltBitMapRastPort()
  95
  96     INTERNALS
  97
  98     HISTORY
  99
 100 *****************************************************************************/
 101 {
 102     AROS_LIBFUNC_INIT
 103
 104     BOOL li_locked = FALSE;
 105
 106
 107     FIX_GFXCOORD(xSrc);
 108     FIX_GFXCOORD(ySrc);
 109     FIX_GFXCOORD(xDest);
 110     FIX_GFXCOORD(yDest);
 111
 112 #if NEW_INTERNAL_CLIPBLIT
 113     if (!OBTAIN_DRIVERDATA(srcRP, GfxBase))
 114         return;
 115 #endif
 116
 117     /* overlapping and non-overlapping blits are handled differently. */
 118
 119     if (srcRP->Layer &&
 120         destRP->Layer &&
 121         (srcRP->Layer != destRP->Layer) &&
 122         (srcRP->Layer->LayerInfo == destRP->Layer->LayerInfo))
 123     {
 124         /* If two layers which belong to the same LayerInfo (~screen)
 125            have to be locked, lock first LayerInfo, otherwise there
 126            is a potential deadlock problem */
 127         LockLayerInfo(srcRP->Layer->LayerInfo);
 128         li_locked = TRUE;
 129     }
 130
 131     if (srcRP->Layer) LockLayerRom( srcRP->Layer);
 132     if (destRP->Layer && (destRP->Layer != srcRP->Layer)) LockLayerRom(destRP->Layer);
 133
 134     /* Once the layers are locked there's no more need to hold the layerinfo lock */
 135
 136     if (li_locked) UnlockLayerInfo(srcRP->Layer->LayerInfo);
 137
 138     /* check for overlapping blits */
 139     if ( srcRP == destRP )
 140     {
 141         struct Region * R;
 142         struct Rectangle Rect;
 143         struct RegionRectangle * RR;
 144
 145         if (!(R = NewRectRegion(xDest, yDest, xDest + xSize - 1, yDest + ySize - 1)))
 146         {
 147             goto exit;
 148         }
 149
 150         /* define the rectangle of the source */
 151         Rect.MinX = xSrc;
 152         Rect.MaxX = xSrc+xSize-1;
 153         Rect.MinY = ySrc;
 154         Rect.MaxY = ySrc+ySize-1;
 155         /* combine them to check for overlapping areas */
 156         AndRectRegion(R, &Rect); /* this call cannot fail! */
 157
 158         RR = R->RegionRectangle;
 159
 160         /* check whether they overlap */
 161         if (NULL != RR)
 162         {
 163             int xs, ys;
 164             /*
 165                It's overlapping; depending on how bad it is overlapping I
 166                will have to split this up into several calls to the
 167                internal ClipBlit routine
 168             */
 169
 170             xs = xDest-xSrc;
 171             ys = yDest-ySrc;
 172             if (xs < 0) xs = -xs;
 173             if (ys < 0) ys = -ys;
 174
 175             /*
 176               if the destination area is overlapping more than half of the
 177               width or height of the source area, then it is the more
 178               difficult case
 179             */
 180
 181             if (xs * 2 < xSize ||
 182                 ys * 2 < ySize)
 183             {
 184                 /*
 185                    In this case I use a special routine to copy the rectangle
 186                 */
 187
 188                 MoveRaster(srcRP,
 189                            xSrc - xDest,
 190                            ySrc - yDest,
 191                            (xSrc < xDest) ? xSrc : xDest,
 192                            (ySrc < yDest) ? ySrc : yDest,
 193                            (xSrc > xDest) ? xSrc + xSize - 1 : xDest + xSize - 1,
 194                            (ySrc > yDest) ? ySrc + ySize - 1 : yDest + ySize - 1,
 195                            FALSE,
 196                            GfxBase);
 197             }
 198             else
 199             {
 200                 LONG dx, dy;
 201
 202                 /*
 203                    This case is not as difficult as the overlapping
 204                    part can be copied first and then the other parts can
 205                    be copied.
 206                 */
 207                 /* first copy the overlapping part to its destination */
 208
 209                 dx = R->bounds.MinX + RR->bounds.MinX - xSrc;
 210                 dy = R->bounds.MinY + RR->bounds.MinY - ySrc;
 211
 212                 internal_ClipBlit(srcRP,
 213                                   xSrc + dx,
 214                                   ySrc + dy,
 215                                   srcRP,
 216                                   xDest + dx,
 217                                   yDest + dy,
 218                                   RR->bounds.MaxX-RR->bounds.MinX+1,
 219                                   RR->bounds.MaxY-RR->bounds.MinY+1,
 220                                   minterm,
 221                                   GfxBase);
 222
 223                 /* and now I invert the Region with the source rectangle */
 224                 if (!XorRectRegion(R, &Rect))
 225                 {
 226                     /* too bad! no more memory */
 227                     DisposeRegion(R);
 228                     goto exit;
 229                 }
 230                 RR = R->RegionRectangle;
 231
 232                 while (NULL != RR)
 233                 {
 234                     dx = R->bounds.MinX + RR->bounds.MinX - xSrc;
 235                     dy = R->bounds.MinY + RR->bounds.MinY - ySrc;
 236
 237                     internal_ClipBlit(srcRP,
 238                                       xSrc + dx,
 239                                       ySrc + dy,
 240                                       srcRP,
 241                                       xDest + dx,
 242                                       yDest + dy,
 243                                       RR->bounds.MaxX-RR->bounds.MinX+1,
 244                                       RR->bounds.MaxY-RR->bounds.MinY+1,
 245                                       minterm,
 246                                       GfxBase);
 247                     RR = RR->Next;
 248
 249                 } /* while */
 250
 251             }
 252
 253         } /* if (NULL != RR)*/
 254         else
 255         {
 256           /* they don't overlap */
 257           internal_ClipBlit(srcRP,
 258                             xSrc,
 259                             ySrc,
 260                             srcRP,
 261                             xDest,
 262                             yDest,
 263                             xSize,
 264                             ySize,
 265                             minterm,
 266                             GfxBase);
 267         }
 268
 269         DisposeRegion(R);
 270
 271     } /* if (destRP == srcRP) */
 272     else
 273     {
 274
 275         /* here: process the case when the source and destination rastports
 276                  are different */
 277
 278         internal_ClipBlit(srcRP,
 279                           xSrc,
 280                           ySrc,
 281                           destRP,
 282                           xDest,
 283                           yDest,
 284                           xSize,
 285                           ySize,
 286                           minterm,
 287                           GfxBase);
 288     }
 289
 290     /* the way out, even in failure */
 291 exit:
 292
 293     if (destRP->Layer && (destRP->Layer != srcRP->Layer)) UnlockLayerRom(destRP->Layer);
 294
 295     if (srcRP->Layer)  UnlockLayerRom( srcRP->Layer);
 296
 297 #if NEW_INTERNAL_CLIPBLIT
 298     RELEASE_DRIVERDATA(srcRP, GfxBase);
 299 #endif
 300
 301     return;
 302
 303     AROS_LIBFUNC_EXIT
 304
 305 } /* ClipBlit */
 306
 307 #if NEW_INTERNAL_CLIPBLIT
 308
 309 struct clipblit_render_data
 310 {
 311     struct render_special_info   rsi;
 312     ULONG                        minterm;
 313     struct RastPort             *destRP;
 314     LONG                         xDest;
 315     LONG                         yDest;
 316 };
 317
 318 static ULONG clipblit_render(APTR data, LONG srcx, LONG srcy,
 319                              OOP_Object *dstbm_obj, OOP_Object *dst_gc,
 320                              LONG x1, LONG y1, LONG x2, LONG y2, struct GfxBase *GfxBase)
 321 {
 322     struct clipblit_render_data *crd = data;
 323
 324     BltBitMapRastPort(crd->rsi.curbm, x1, y1,
 325                       crd->destRP, crd->xDest + srcx, crd->yDest + srcy,
 326                       x2 - x1 + 1,
 327                       y2 - y1 + 1,
 328                       crd->minterm);
 329
 330     return 0;
 331 }
 332
 333 void internal_ClipBlit(struct RastPort * srcRP,
 334                        LONG xSrc,
 335                        LONG ySrc,
 336                        struct RastPort * destRP,
 337                        LONG xDest,
 338                        LONG yDest,
 339                        LONG xSize,
 340                        LONG ySize,
 341                        UBYTE minterm,
 342                        struct GfxBase * GfxBase)
 343 {
 344     struct clipblit_render_data data;
 345     struct Rectangle            rect;
 346
 347     data.minterm        = minterm;
 348     data.destRP         = destRP;
 349     data.xDest          = xDest;
 350     data.yDest          = yDest;
 351
 352     rect.MinX = xSrc;
 353     rect.MinY = ySrc;
 354     rect.MaxX = xSrc + xSize - 1;
 355     rect.MaxY = ySrc + ySize - 1;
 356
 357     do_render_func(srcRP, NULL, &rect, clipblit_render, &data, TRUE, GfxBase);
 358 }
 359
 360 #else
 361
 362 void internal_ClipBlit(struct RastPort * srcRP,
 363                        LONG xSrc,
 364                        LONG ySrc,
 365                        struct RastPort * destRP,
 366                        LONG xDest,
 367                        LONG yDest,
 368                        LONG xSize,
 369                        LONG ySize,
 370                        UBYTE minterm,
 371                        struct GfxBase * GfxBase)
 372 {
 373   struct ClipRect * srcCR  = NULL;
 374   struct ClipRect * destCR = NULL;
 375   struct BitMap   * srcBM  =  srcRP->BitMap;
 376   struct BitMap   * destBM =  destRP->BitMap;
 377   struct Layer    * srcLayer =  srcRP->Layer;
 378   struct Layer    * destLayer= destRP->Layer;
 379   struct Rectangle destRect;
 380   LONG bltSrcX = 0, bltSrcY = 0, bltDstX, bltDstY, bltWidth, bltHeight;
 381   ULONG SrcOffsetX;
 382   ULONG bltMask;
 383   UBYTE useminterm = 0;
 384
 385
 386 /* nlorentz: The below did not work because bitmaps may be more than 8 bit.
 387    Just setting it to 0xFFFFFFF should work fine for copying all planes
 388
 389   UBYTE MaskTab[] = {0x00, 0x01, 0x03, 0x07, 0x0F,
 390                            0x1F, 0x3F, 0x7F, 0xFF};
 391   LONG i1 = GetBitMapAttr(srcBM , BMA_DEPTH);
 392   LONG i2 = GetBitMapAttr(destBM, BMA_DEPTH);
 393   bltMask = MaskTab[i1] & MaskTab[i2];
 394 */
 395   bltMask = 0xFFFFFFFF;
 396
 397   if (NULL != srcLayer)
 398     srcCR  = srcLayer->ClipRect;
 399
 400   /* process all source and destination bitmaps */
 401   while (TRUE)
 402   {
 403     /*
 404        First I look for a source bitmap that fits into the given
 405        source area, then I will look for a destination bitmap to
 406        blit it into.
 407      */
 408
 409     /* Does the source have layers? */
 410     if (NULL != srcRP->Layer)
 411     {
 412       while (NULL != srcCR)
 413       {
 414           LONG crX0, crX1, crY0, crY1;
 415           /* cr?? have to be coordinates related to the rastport */
 416           crX0 = srcCR->bounds.MinX - srcLayer->bounds.MinX;
 417           crX1 = srcCR->bounds.MaxX - srcLayer->bounds.MinX;
 418           crY0 = srcCR->bounds.MinY - srcLayer->bounds.MinY;
 419           crY1 = srcCR->bounds.MaxY - srcLayer->bounds.MinY;
 420
 421           /* the only case that must not happen is that
 422              this ClipRect is outside the destination area.  */
 423           if (!(crX0 > (xSrc+xSize-1) ||
 424                 crX1 <  xSrc          ||
 425                 crY0 > (ySrc+ySize-1) ||
 426                 crY1 <  ySrc))
 427           {
 428             /* this cliprect contains bitmap data that need to be copied */
 429             /*
 430               get the pointer to the bitmap structure and fill out
 431               the rectangle structure that shows which part we mean to copy
 432              */
 433             if (NULL != srcCR->BitMap)
 434             {
 435               if (0 == (srcLayer->Flags & LAYERSUPER))
 436               {
 437                 /* no superbitmap */
 438                 SrcOffsetX = ALIGN_OFFSET(srcCR->bounds.MinX);
 439
 440                 if (xSrc >= crX0)
 441                   bltSrcX = xSrc - crX0 + SrcOffsetX;
 442                 else
 443                   bltSrcX = SrcOffsetX;
 444
 445                 if (ySrc > crY0)
 446                   bltSrcY   = ySrc - crY0;
 447                 else
 448                   bltSrcY   = 0;
 449
 450                 srcBM     = srcCR->BitMap;
 451               }
 452               else
 453               {
 454                 /* with superbitmap */
 455                 if (xSrc >= crX0)
 456                   bltSrcX = xSrc - srcLayer->Scroll_X;
 457                 else
 458                   bltSrcX = crX0 - srcLayer->Scroll_X;
 459
 460                 if (ySrc >= crY0)
 461                   bltSrcY   = ySrc - srcLayer->Scroll_Y;
 462                 else
 463                   bltSrcY   = crY0 - srcLayer->Scroll_Y;
 464
 465                 srcBM     = srcCR->BitMap;
 466               }
 467
 468             }
 469             else
 470             {
 471               /* this part of the layer is not hidden. */
 472               /* The source bitmap is the bitmap of the rastport */
 473               srcBM   = srcRP->BitMap;
 474
 475               /* xSrc and ySrc are relative to the rastport of the window
 476                  or layer - here we have to make them absolute to the
 477                  screen's rastport*/
 478
 479               if (xSrc <= crX0)
 480                 bltSrcX = srcCR->bounds.MinX;
 481               else
 482                 bltSrcX = xSrc + srcLayer->bounds.MinX;
 483
 484               if (ySrc <= crY0)
 485                 bltSrcY = srcCR->bounds.MinY;
 486               else
 487                 bltSrcY = ySrc + srcLayer->bounds.MinY;
 488             }
 489
 490             if (crX0 > xSrc)
 491               destRect.MinX = crX0 - xSrc + xDest;
 492             else
 493               destRect.MinX = xDest;
 494
 495             if (crX1 < (xSrc+xSize-1))
 496               destRect.MaxX = crX1 - xSrc + xDest;
 497             else
 498               destRect.MaxX = xDest+xSize-1;
 499
 500             if (crY0 > ySrc)
 501               destRect.MinY = crY0 - ySrc + yDest;
 502             else
 503               destRect.MinY = yDest;
 504
 505             if (crY1 < (ySrc+ySize-1))
 506               destRect.MaxY = crY1 - ySrc + yDest;
 507             else
 508               destRect.MaxY = yDest+ySize-1;
 509
 510             if ((0 != (srcLayer->Flags & LAYERSIMPLE) &&
 511                 (NULL != srcCR->lobs ||
 512                 0 != (srcCR   ->Flags & CR_NEEDS_NO_CONCEALED_RASTERS))))
 513               useminterm = 0x0;     /* clear this area in the destination */
 514             else
 515               useminterm = minterm;
 516
 517             break;
 518           } /* if () */
 519         srcCR = srcCR -> Next;
 520       }
 521       if (NULL == srcCR)
 522         return;
 523     } /* if() */
 524     else /* no layer in the source rastport */
 525     {
 526       srcBM = srcRP->BitMap;
 527       destRect.MinX = xDest;
 528       destRect.MinY = yDest;
 529       destRect.MaxX = xDest+xSize-1;
 530       destRect.MaxY = yDest+ySize-1;
 531
 532       bltSrcX = xSrc;
 533       bltSrcY = ySrc;
 534
 535       useminterm = minterm;
 536     }
 537
 538
 539     /* Does the destination have layers */
 540     if (NULL != destLayer)
 541     {
 542       destCR = destLayer -> ClipRect;
 543       /* search for the first/next BitMap that is to be filled  */
 544       /* destRect contains the area that we want to copy to */
 545       while (NULL != destCR)
 546       {
 547         /* if the layer is a simple layer and the cliprect's flag
 548            has a certain bit set or the CR is hidden, then do
 549            nothing here! */
 550         if (!(0    != (destLayer->Flags & LAYERSIMPLE) &&
 551              (NULL !=  destCR   ->lobs ||
 552               0    != (destCR   ->Flags & CR_NEEDS_NO_CONCEALED_RASTERS))))
 553         {
 554           struct Rectangle destRect2;
 555           LONG DestOffsetX, DestOffsetY;
 556
 557           destRect2.MinX = destCR->bounds.MinX - destLayer->bounds.MinX;
 558           destRect2.MaxX = destCR->bounds.MaxX - destLayer->bounds.MinX;
 559           destRect2.MinY = destCR->bounds.MinY - destLayer->bounds.MinY;
 560           destRect2.MaxY = destCR->bounds.MaxY - destLayer->bounds.MinY;
 561
 562
 563          /* does this ClipRect fit into the destination area?
 564              The only case that must not happen is that it lies
 565              outside of destRect */
 566           if (!(destRect.MinX  > destRect2.MaxX ||
 567                 destRect.MaxX  < destRect2.MinX ||
 568                 destRect.MinY  > destRect2.MaxY ||
 569                 destRect.MaxY  < destRect2.MinY   ))
 570           {
 571             LONG bltSrcX_tmp = bltSrcX;
 572             LONG bltSrcY_tmp = bltSrcY;
 573             bltWidth  = destRect.MaxX - destRect.MinX + 1;
 574             bltHeight = destRect.MaxY - destRect.MinY + 1;
 575
 576             /*
 577                destCR actually contains the/a part of the rectangle that
 578                we have to blit to
 579              */
 580             if (NULL != destCR->BitMap)
 581             {
 582               if (0 == (destLayer->Flags & LAYERSUPER))
 583               {
 584                 /* no superbitmap */
 585                 destBM      = destCR->BitMap;
 586                 DestOffsetX = ALIGN_OFFSET(destCR->bounds.MinX);
 587                 DestOffsetY = 0;
 588               }
 589               else
 590               {
 591                 /* with superbitmap */
 592                 destBM      = destLayer->SuperBitMap;
 593                 DestOffsetX = destCR->bounds.MinX - destLayer->bounds.MinX -
 594                                                     destLayer->Scroll_X;
 595                 DestOffsetY = destCR->bounds.MinY - destLayer->bounds.MinY -
 596                                                     destLayer->Scroll_Y;;
 597               }
 598             }
 599             else
 600             {
 601               destBM      = destRP->BitMap;
 602
 603               DestOffsetX = destCR->bounds.MinX;
 604               DestOffsetY = destCR->bounds.MinY;
 605             }
 606
 607             if (destRect.MinX > destRect2.MinX)
 608             {
 609               bltDstX   = destRect.MinX - destRect2.MinX + DestOffsetX;
 610             }
 611             else
 612             {
 613               bltDstX   = DestOffsetX;
 614               bltWidth -= (destRect2.MinX - destRect.MinX);
 615               bltSrcX_tmp  += (destRect2.MinX - destRect.MinX);
 616             }
 617
 618             if (destRect.MaxX > destRect2.MaxX)
 619               bltWidth -= (destRect.MaxX - destRect2.MaxX);
 620
 621             if (destRect.MinY > destRect2.MinY)
 622             {
 623               bltDstY    = destRect.MinY - destRect2.MinY + DestOffsetY;
 624             }
 625             else
 626             {
 627               bltDstY    = DestOffsetY;
 628               bltHeight -= (destRect2.MinY - destRect.MinY);
 629               bltSrcY_tmp   += (destRect2.MinY - destRect.MinY);
 630             }
 631
 632             if (destRect.MaxY > destRect2.MaxY)
 633               bltHeight -= (destRect.MaxY - destRect2.MaxY);
 634
 635             BltBitMap(srcBM,
 636                       bltSrcX_tmp,
 637                       bltSrcY_tmp,
 638                       destBM,
 639                       bltDstX,
 640                       bltDstY,
 641                       bltWidth,
 642                       bltHeight,
 643                       useminterm,
 644                       bltMask,
 645                       NULL);
 646           } /* if (... ) */
 647         }
 648         destCR = destCR -> Next;
 649       } /* while (NULL != destCR) */
 650     } /* if (NULL != destRP->Layer) */
 651     else
 652     {
 653       /* the destination does not have a layer. So I copy from srcBM
 654          the whole rectangle that is given in destRect to the rastport's
 655          bitmap */
 656       BltBitMap(srcBM,
 657                 bltSrcX,
 658                 bltSrcY,
 659                 destRP->BitMap,
 660                 destRect.MinX,
 661                 destRect.MinY,
 662                 destRect.MaxX - destRect.MinX + 1,
 663                 destRect.MaxY - destRect.MinY + 1,
 664                 useminterm,
 665                 bltMask,
 666                 NULL);
 667     }
 668
 669     /* if the source rastport doesn't have a layer then I am done here
 670        as all the blits from the one bitmap have already happened.
 671      */
 672
 673     if (NULL != srcCR)
 674       srcCR = srcCR->Next;
 675     else
 676       break;
 677
 678     if (NULL == srcLayer)
 679       break;
 680   } /* while (TRUE) */
 681
 682   return;
 683 }
 684
 685 #endif /* NEW_INTERNAL_CLIPBLIT */
 686
 687 #undef LayersBase