dlls/gdi32/bitmap.c

   1 /*
   2  * GDI bitmap objects
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *           1998 Huw D M Davies
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "gdi_private.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
  33
  34
  35 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc );
  36 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer );
  37 static BOOL BITMAP_DeleteObject( HGDIOBJ handle );
  38
  39 static const struct gdi_obj_funcs bitmap_funcs =
  40 {
  41     BITMAP_SelectObject,  /* pSelectObject */
  42     BITMAP_GetObject,     /* pGetObjectA */
  43     BITMAP_GetObject,     /* pGetObjectW */
  44     NULL,                 /* pUnrealizeObject */
  45     BITMAP_DeleteObject   /* pDeleteObject */
  46 };
  47
  48
  49 /******************************************************************************
  50  * CreateBitmap [GDI32.@]
  51  *
  52  * Creates a bitmap with the specified info.
  53  *
  54  * PARAMS
  55  *    width  [I] bitmap width
  56  *    height [I] bitmap height
  57  *    planes [I] Number of color planes
  58  *    bpp    [I] Number of bits to identify a color
  59  *    bits   [I] Pointer to array containing color data
  60  *
  61  * RETURNS
  62  *    Success: Handle to bitmap
  63  *    Failure: 0
  64  */
  65 HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
  66                              UINT bpp, LPCVOID bits )
  67 {
  68     BITMAP bm;
  69
  70     bm.bmType = 0;
  71     bm.bmWidth = width;
  72     bm.bmHeight = height;
  73     bm.bmWidthBytes = get_bitmap_stride( width, bpp );
  74     bm.bmPlanes = planes;
  75     bm.bmBitsPixel = bpp;
  76     bm.bmBits = (LPVOID)bits;
  77
  78     return CreateBitmapIndirect( &bm );
  79 }
  80
  81 /******************************************************************************
  82  * CreateCompatibleBitmap [GDI32.@]
  83  *
  84  * Creates a bitmap compatible with the DC.
  85  *
  86  * PARAMS
  87  *    hdc    [I] Handle to device context
  88  *    width  [I] Width of bitmap
  89  *    height [I] Height of bitmap
  90  *
  91  * RETURNS
  92  *    Success: Handle to bitmap
  93  *    Failure: 0
  94  */
  95 HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
  96 {
  97     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
  98     BITMAPINFO *bi = (BITMAPINFO *)buffer;
  99     DIBSECTION dib;
 100
 101     TRACE("(%p,%d,%d)\n", hdc, width, height);
 102
 103     if (GetObjectType( hdc ) != OBJ_MEMDC)
 104         return CreateBitmap( width, height,
 105                              GetDeviceCaps(hdc, PLANES), GetDeviceCaps(hdc, BITSPIXEL), NULL );
 106
 107     switch (GetObjectW( GetCurrentObject( hdc, OBJ_BITMAP ), sizeof(dib), &dib ))
 108     {
 109     case sizeof(BITMAP): /* A device-dependent bitmap is selected in the DC */
 110         return CreateBitmap( width, height, dib.dsBm.bmPlanes, dib.dsBm.bmBitsPixel, NULL );
 111
 112     case sizeof(DIBSECTION): /* A DIB section is selected in the DC */
 113         bi->bmiHeader = dib.dsBmih;
 114         bi->bmiHeader.biWidth  = width;
 115         bi->bmiHeader.biHeight = height;
 116         if (dib.dsBmih.biCompression == BI_BITFIELDS)  /* copy the color masks */
 117             memcpy(bi->bmiColors, dib.dsBitfields, sizeof(dib.dsBitfields));
 118         else if (dib.dsBmih.biBitCount <= 8)  /* copy the color table */
 119             GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
 120         return CreateDIBSection( hdc, bi, DIB_RGB_COLORS, NULL, NULL, 0 );
 121
 122     default:
 123         return 0;
 124     }
 125 }
 126
 127
 128 /******************************************************************************
 129  * CreateBitmapIndirect [GDI32.@]
 130  *
 131  * Creates a bitmap with the specified info.
 132  *
 133  * PARAMS
 134  *  bmp [I] Pointer to the bitmap info describing the bitmap
 135  *
 136  * RETURNS
 137  *    Success: Handle to bitmap
 138  *    Failure: NULL. Use GetLastError() to determine the cause.
 139  *
 140  * NOTES
 141  *  If a width or height of 0 is given, a 1x1 monochrome bitmap is returned.
 142  */
 143 HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
 144 {
 145     BITMAP bm;
 146     BITMAPOBJ *bmpobj;
 147     HBITMAP hbitmap;
 148
 149     if (!bmp || bmp->bmType)
 150     {
 151         SetLastError( ERROR_INVALID_PARAMETER );
 152         return NULL;
 153     }
 154
 155     if (bmp->bmWidth > 0x7ffffff || bmp->bmHeight > 0x7ffffff)
 156     {
 157         SetLastError( ERROR_INVALID_PARAMETER );
 158         return 0;
 159     }
 160
 161     bm = *bmp;
 162
 163     if (!bm.bmWidth || !bm.bmHeight)
 164     {
 165         return GetStockObject( DEFAULT_BITMAP );
 166     }
 167     else
 168     {
 169         if (bm.bmHeight < 0)
 170             bm.bmHeight = -bm.bmHeight;
 171         if (bm.bmWidth < 0)
 172             bm.bmWidth = -bm.bmWidth;
 173     }
 174
 175     if (bm.bmPlanes != 1)
 176     {
 177         FIXME("planes = %d\n", bm.bmPlanes);
 178         SetLastError( ERROR_INVALID_PARAMETER );
 179         return NULL;
 180     }
 181
 182     /* Windows only uses 1, 4, 8, 16, 24 and 32 bpp */
 183     if(bm.bmBitsPixel == 1)         bm.bmBitsPixel = 1;
 184     else if(bm.bmBitsPixel <= 4)    bm.bmBitsPixel = 4;
 185     else if(bm.bmBitsPixel <= 8)    bm.bmBitsPixel = 8;
 186     else if(bm.bmBitsPixel <= 16)   bm.bmBitsPixel = 16;
 187     else if(bm.bmBitsPixel <= 24)   bm.bmBitsPixel = 24;
 188     else if(bm.bmBitsPixel <= 32)   bm.bmBitsPixel = 32;
 189     else {
 190         WARN("Invalid bmBitsPixel %d, returning ERROR_INVALID_PARAMETER\n", bm.bmBitsPixel);
 191         SetLastError(ERROR_INVALID_PARAMETER);
 192         return NULL;
 193     }
 194
 195     /* Windows ignores the provided bm.bmWidthBytes */
 196     bm.bmWidthBytes = get_bitmap_stride( bm.bmWidth, bm.bmBitsPixel );
 197     /* XP doesn't allow to create bitmaps larger than 128 Mb */
 198     if (bm.bmHeight > 128 * 1024 * 1024 / bm.bmWidthBytes)
 199     {
 200         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 201         return 0;
 202     }
 203
 204     /* Create the BITMAPOBJ */
 205     if (!(bmpobj = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*bmpobj) )))
 206     {
 207         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 208         return 0;
 209     }
 210
 211     bmpobj->dib.dsBm = bm;
 212     bmpobj->dib.dsBm.bmBits = NULL;
 213
 214     if (!(hbitmap = alloc_gdi_handle( bmpobj, OBJ_BITMAP, &bitmap_funcs )))
 215     {
 216         HeapFree( GetProcessHeap(), 0, bmpobj );
 217         return 0;
 218     }
 219
 220     if (bm.bmBits)
 221         SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
 222
 223     TRACE("%dx%d, bpp %d planes %d: returning %p\n", bm.bmWidth, bm.bmHeight,
 224           bm.bmBitsPixel, bm.bmPlanes, hbitmap);
 225
 226     return hbitmap;
 227 }
 228
 229
 230 /***********************************************************************
 231  * GetBitmapBits [GDI32.@]
 232  *
 233  * Copies bitmap bits of bitmap to buffer.
 234  *
 235  * RETURNS
 236  *    Success: Number of bytes copied
 237  *    Failure: 0
 238  */
 239 LONG WINAPI GetBitmapBits(
 240     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 241     LONG count,        /* [in]  Number of bytes to copy */
 242     LPVOID bits)       /* [out] Pointer to buffer to receive bits */
 243 {
 244     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 245     BITMAPINFO *info = (BITMAPINFO *)buffer;
 246     struct gdi_image_bits src_bits;
 247     struct bitblt_coords src;
 248     int dst_stride, max, ret;
 249     BITMAPOBJ *bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 250
 251     if (!bmp) return 0;
 252
 253     dst_stride = get_bitmap_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
 254     ret = max = dst_stride * bmp->dib.dsBm.bmHeight;
 255     if (!bits) goto done;
 256     if (count < 0 || count > max) count = max;
 257     ret = count;
 258
 259     src.visrect.left = 0;
 260     src.visrect.right = bmp->dib.dsBm.bmWidth;
 261     src.visrect.top = 0;
 262     src.visrect.bottom = (count + dst_stride - 1) / dst_stride;
 263     src.x = src.y = 0;
 264     src.width = src.visrect.right - src.visrect.left;
 265     src.height = src.visrect.bottom - src.visrect.top;
 266
 267     if (!get_image_from_bitmap( bmp, info, &src_bits, &src ))
 268     {
 269         const char *src_ptr = src_bits.ptr;
 270         int src_stride = get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
 271
 272         /* GetBitmapBits returns 16-bit aligned data */
 273
 274         if (info->bmiHeader.biHeight > 0)
 275         {
 276             src_ptr += (info->bmiHeader.biHeight - 1) * src_stride;
 277             src_stride = -src_stride;
 278         }
 279         src_ptr += src.visrect.top * src_stride;
 280
 281         if (src_stride == dst_stride) memcpy( bits, src_ptr, count );
 282         else while (count > 0)
 283         {
 284             memcpy( bits, src_ptr, min( count, dst_stride ) );
 285             src_ptr += src_stride;
 286             bits = (char *)bits + dst_stride;
 287             count -= dst_stride;
 288         }
 289         if (src_bits.free) src_bits.free( &src_bits );
 290     }
 291     else ret = 0;
 292
 293 done:
 294     GDI_ReleaseObj( hbitmap );
 295     return ret;
 296 }
 297
 298
 299 /******************************************************************************
 300  * SetBitmapBits [GDI32.@]
 301  *
 302  * Sets bits of color data for a bitmap.
 303  *
 304  * RETURNS
 305  *    Success: Number of bytes used in setting the bitmap bits
 306  *    Failure: 0
 307  */
 308 LONG WINAPI SetBitmapBits(
 309     HBITMAP hbitmap, /* [in] Handle to bitmap */
 310     LONG count,        /* [in] Number of bytes in bitmap array */
 311     LPCVOID bits)      /* [in] Address of array with bitmap bits */
 312 {
 313     char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
 314     BITMAPINFO *info = (BITMAPINFO *)buffer;
 315     BITMAPOBJ *bmp;
 316     DWORD err;
 317     int i, src_stride, dst_stride;
 318     struct bitblt_coords src, dst;
 319     struct gdi_image_bits src_bits;
 320     HRGN clip = NULL;
 321
 322     if (!bits) return 0;
 323
 324     bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 325     if (!bmp) return 0;
 326
 327     if (count < 0) {
 328         WARN("(%d): Negative number of bytes passed???\n", count );
 329         count = -count;
 330     }
 331
 332     src_stride = get_bitmap_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
 333     count = min( count, src_stride * bmp->dib.dsBm.bmHeight );
 334
 335     dst_stride = get_dib_stride( bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmBitsPixel );
 336
 337     src.visrect.left   = src.x = 0;
 338     src.visrect.top    = src.y = 0;
 339     src.visrect.right  = src.width = bmp->dib.dsBm.bmWidth;
 340     src.visrect.bottom = src.height = (count + src_stride - 1 ) / src_stride;
 341     dst = src;
 342
 343     if (count % src_stride)
 344     {
 345         HRGN last_row;
 346         int extra_pixels = ((count % src_stride) << 3) / bmp->dib.dsBm.bmBitsPixel;
 347
 348         if ((count % src_stride << 3) % bmp->dib.dsBm.bmBitsPixel)
 349             FIXME( "Unhandled partial pixel\n" );
 350         clip = CreateRectRgn( src.visrect.left, src.visrect.top,
 351                               src.visrect.right, src.visrect.bottom - 1 );
 352         last_row = CreateRectRgn( src.visrect.left, src.visrect.bottom - 1,
 353                                   src.visrect.left + extra_pixels, src.visrect.bottom );
 354         CombineRgn( clip, clip, last_row, RGN_OR );
 355         DeleteObject( last_row );
 356     }
 357
 358     TRACE("(%p, %d, %p) %dx%d %d bpp fetched height: %d\n",
 359           hbitmap, count, bits, bmp->dib.dsBm.bmWidth, bmp->dib.dsBm.bmHeight,
 360           bmp->dib.dsBm.bmBitsPixel, src.height );
 361
 362     if (src_stride == dst_stride)
 363     {
 364         src_bits.ptr = (void *)bits;
 365         src_bits.is_copy = FALSE;
 366         src_bits.free = NULL;
 367     }
 368     else
 369     {
 370         if (!(src_bits.ptr = HeapAlloc( GetProcessHeap(), 0, dst.height * dst_stride )))
 371         {
 372             GDI_ReleaseObj( hbitmap );
 373             return 0;
 374         }
 375         src_bits.is_copy = TRUE;
 376         src_bits.free = free_heap_bits;
 377         for (i = 0; i < count / src_stride; i++)
 378             memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, src_stride );
 379         if (count % src_stride)
 380             memcpy( (char *)src_bits.ptr + i * dst_stride, (char *)bits + i * src_stride, count % src_stride );
 381     }
 382
 383     /* query the color info */
 384     info->bmiHeader.biSize          = sizeof(info->bmiHeader);
 385     info->bmiHeader.biPlanes        = 1;
 386     info->bmiHeader.biBitCount      = bmp->dib.dsBm.bmBitsPixel;
 387     info->bmiHeader.biCompression   = BI_RGB;
 388     info->bmiHeader.biXPelsPerMeter = 0;
 389     info->bmiHeader.biYPelsPerMeter = 0;
 390     info->bmiHeader.biClrUsed       = 0;
 391     info->bmiHeader.biClrImportant  = 0;
 392     info->bmiHeader.biWidth         = 0;
 393     info->bmiHeader.biHeight        = 0;
 394     info->bmiHeader.biSizeImage     = 0;
 395     err = put_image_into_bitmap( bmp, 0, info, NULL, NULL, NULL );
 396
 397     if (!err || err == ERROR_BAD_FORMAT)
 398     {
 399         info->bmiHeader.biWidth     = bmp->dib.dsBm.bmWidth;
 400         info->bmiHeader.biHeight    = -dst.height;
 401         info->bmiHeader.biSizeImage = dst.height * dst_stride;
 402         err = put_image_into_bitmap( bmp, clip, info, &src_bits, &src, &dst );
 403     }
 404     if (err) count = 0;
 405
 406     if (clip) DeleteObject( clip );
 407     if (src_bits.free) src_bits.free( &src_bits );
 408     GDI_ReleaseObj( hbitmap );
 409     return count;
 410 }
 411
 412
 413 /***********************************************************************
 414  *           BITMAP_SelectObject
 415  */
 416 static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, HDC hdc )
 417 {
 418     HGDIOBJ ret;
 419     BITMAPOBJ *bitmap;
 420     DC *dc;
 421     PHYSDEV physdev;
 422
 423     if (!(dc = get_dc_ptr( hdc ))) return 0;
 424
 425     if (GetObjectType( hdc ) != OBJ_MEMDC)
 426     {
 427         ret = 0;
 428         goto done;
 429     }
 430     ret = dc->hBitmap;
 431     if (handle == dc->hBitmap) goto done;  /* nothing to do */
 432
 433     if (!(bitmap = GDI_GetObjPtr( handle, OBJ_BITMAP )))
 434     {
 435         ret = 0;
 436         goto done;
 437     }
 438
 439     if (handle != GetStockObject(DEFAULT_BITMAP) && GDI_get_ref_count( handle ))
 440     {
 441         WARN( "Bitmap already selected in another DC\n" );
 442         GDI_ReleaseObj( handle );
 443         ret = 0;
 444         goto done;
 445     }
 446
 447     if (bitmap->dib.dsBm.bmBitsPixel != 1 &&
 448         bitmap->dib.dsBm.bmBitsPixel != GetDeviceCaps( hdc, BITSPIXEL ))
 449     {
 450         WARN( "Wrong format bitmap %u bpp\n", bitmap->dib.dsBm.bmBitsPixel );
 451         GDI_ReleaseObj( handle );
 452         ret = 0;
 453         goto done;
 454     }
 455
 456     physdev = GET_DC_PHYSDEV( dc, pSelectBitmap );
 457     if (!physdev->funcs->pSelectBitmap( physdev, handle ))
 458     {
 459         GDI_ReleaseObj( handle );
 460         ret = 0;
 461     }
 462     else
 463     {
 464         dc->hBitmap = handle;
 465         GDI_inc_ref_count( handle );
 466         dc->dirty = 0;
 467         dc->vis_rect.left   = 0;
 468         dc->vis_rect.top    = 0;
 469         dc->vis_rect.right  = bitmap->dib.dsBm.bmWidth;
 470         dc->vis_rect.bottom = bitmap->dib.dsBm.bmHeight;
 471         dc->device_rect = dc->vis_rect;
 472         GDI_ReleaseObj( handle );
 473         DC_InitDC( dc );
 474         GDI_dec_ref_count( ret );
 475     }
 476
 477  done:
 478     release_dc_ptr( dc );
 479     return ret;
 480 }
 481
 482
 483 /***********************************************************************
 484  *           BITMAP_DeleteObject
 485  */
 486 static BOOL BITMAP_DeleteObject( HGDIOBJ handle )
 487 {
 488     BITMAPOBJ *bmp = free_gdi_handle( handle );
 489
 490     if (!bmp) return FALSE;
 491     HeapFree( GetProcessHeap(), 0, bmp->dib.dsBm.bmBits );
 492     return HeapFree( GetProcessHeap(), 0, bmp );
 493 }
 494
 495
 496 /***********************************************************************
 497  *           BITMAP_GetObject
 498  */
 499 static INT BITMAP_GetObject( HGDIOBJ handle, INT count, LPVOID buffer )
 500 {
 501     INT ret = 0;
 502     BITMAPOBJ *bmp = GDI_GetObjPtr( handle, OBJ_BITMAP );
 503
 504     if (!bmp) return 0;
 505
 506     if (!buffer) ret = sizeof(BITMAP);
 507     else if (count >= sizeof(BITMAP))
 508     {
 509         BITMAP *bitmap = buffer;
 510         *bitmap = bmp->dib.dsBm;
 511         bitmap->bmBits = NULL;
 512         ret = sizeof(BITMAP);
 513     }
 514     GDI_ReleaseObj( handle );
 515     return ret;
 516 }
 517
 518
 519 /******************************************************************************
 520  * CreateDiscardableBitmap [GDI32.@]
 521  *
 522  * Creates a discardable bitmap.
 523  *
 524  * RETURNS
 525  *    Success: Handle to bitmap
 526  *    Failure: NULL
 527  */
 528 HBITMAP WINAPI CreateDiscardableBitmap(
 529     HDC hdc,    /* [in] Handle to device context */
 530     INT width,  /* [in] Bitmap width */
 531     INT height) /* [in] Bitmap height */
 532 {
 533     return CreateCompatibleBitmap( hdc, width, height );
 534 }
 535
 536
 537 /******************************************************************************
 538  * GetBitmapDimensionEx [GDI32.@]
 539  *
 540  * Retrieves dimensions of a bitmap.
 541  *
 542  * RETURNS
 543  *    Success: TRUE
 544  *    Failure: FALSE
 545  */
 546 BOOL WINAPI GetBitmapDimensionEx(
 547     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 548     LPSIZE size)     /* [out] Address of struct receiving dimensions */
 549 {
 550     BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 551     if (!bmp) return FALSE;
 552     *size = bmp->size;
 553     GDI_ReleaseObj( hbitmap );
 554     return TRUE;
 555 }
 556
 557
 558 /******************************************************************************
 559  * SetBitmapDimensionEx [GDI32.@]
 560  *
 561  * Assigns dimensions to a bitmap.
 562  * MSDN says that this function will fail if hbitmap is a handle created by
 563  * CreateDIBSection, but that's not true on Windows 2000.
 564  *
 565  * RETURNS
 566  *    Success: TRUE
 567  *    Failure: FALSE
 568  */
 569 BOOL WINAPI SetBitmapDimensionEx(
 570     HBITMAP hbitmap, /* [in]  Handle to bitmap */
 571     INT x,           /* [in]  Bitmap width */
 572     INT y,           /* [in]  Bitmap height */
 573     LPSIZE prevSize) /* [out] Address of structure for orig dims */
 574 {
 575     BITMAPOBJ * bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP );
 576     if (!bmp) return FALSE;
 577     if (prevSize) *prevSize = bmp->size;
 578     bmp->size.cx = x;
 579     bmp->size.cy = y;
 580     GDI_ReleaseObj( hbitmap );
 581     return TRUE;
 582 }