objects/bitmap.c

   1 /*
   2  * GDI bitmap objects
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  */
   6
   7 static char Copyright[] = "Copyright  Alexandre Julliard, 1993";
   8
   9 #include <stdlib.h>
  10 #include <X11/Xlib.h>
  11 #include <X11/Xutil.h>
  12 #include "gdi.h"
  13 #include "bitmap.h"
  14
  15
  16   /* Handle of the bitmap selected by default in a memory DC */
  17 HBITMAP BITMAP_hbitmapMemDC = 0;
  18
  19   /* GCs used for B&W and color bitmap operations */
  20 GC BITMAP_monoGC = 0, BITMAP_colorGC = 0;
  21
  22
  23 /***********************************************************************
  24  *           BITMAP_Init
  25  */
  26 BOOL BITMAP_Init()
  27 {
  28     Pixmap tmpPixmap;
  29
  30       /* Create the necessary GCs */
  31
  32     if ((tmpPixmap = XCreatePixmap( display, rootWindow, 1, 1, 1 )))
  33     {
  34         BITMAP_monoGC = XCreateGC( display, tmpPixmap, 0, NULL );
  35         XSetGraphicsExposures( display, BITMAP_monoGC, False );
  36         XFreePixmap( display, tmpPixmap );
  37     }
  38
  39     if (screenDepth != 1)
  40     {
  41         if ((tmpPixmap = XCreatePixmap(display, rootWindow, 1,1,screenDepth)))
  42         {
  43             BITMAP_colorGC = XCreateGC( display, tmpPixmap, 0, NULL );
  44             XSetGraphicsExposures( display, BITMAP_colorGC, False );
  45             XFreePixmap( display, tmpPixmap );
  46         }
  47     }
  48
  49     BITMAP_hbitmapMemDC = CreateBitmap( 1, 1, 1, 1, NULL );
  50     return (BITMAP_hbitmapMemDC != 0);
  51 }
  52
  53
  54 /***********************************************************************
  55  *           BITMAP_BmpToImage
  56  *
  57  * Create an XImage pointing to the bitmap data.
  58  */
  59 static XImage *BITMAP_BmpToImage( BITMAP * bmp, void * bmpData )
  60 {
  61     extern void _XInitImageFuncPtrs( XImage* );
  62     XImage * image;
  63
  64     image = XCreateImage( XT_display, DefaultVisualOfScreen(screen),
  65                           bmp->bmBitsPixel, ZPixmap, 0, bmpData,
  66                           bmp->bmWidth, bmp->bmHeight, 16, bmp->bmWidthBytes );
  67     if (!image) return 0;
  68     image->byte_order = MSBFirst;
  69     image->bitmap_bit_order = MSBFirst;
  70     image->bitmap_unit = 16;
  71     _XInitImageFuncPtrs(image);
  72     return image;
  73 }
  74
  75
  76 /***********************************************************************
  77  *           CreateBitmap    (GDI.48)
  78  */
  79 HBITMAP CreateBitmap( short width, short height,
  80                       BYTE planes, BYTE bpp, LPSTR bits )
  81 {
  82     BITMAP bitmap = { 0, width, height, 0, planes, bpp, bits };
  83 #ifdef DEBUG_GDI
  84     printf( "CreateBitmap: %dx%d, %d colors\n",
  85              width, height, 1 << (planes*bpp) );
  86 #endif
  87     return CreateBitmapIndirect( &bitmap );
  88 }
  89
  90
  91 /***********************************************************************
  92  *           CreateCompatibleBitmap    (GDI.51)
  93  */
  94 HBITMAP CreateCompatibleBitmap( HDC hdc, short width, short height )
  95 {
  96     DC * dc;
  97 #ifdef DEBUG_GDI
  98     printf( "CreateCompatibleBitmap: %d %dx%d\n", hdc, width, height );
  99 #endif
 100     if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return 0;
 101     return CreateBitmap( width, height, 1, dc->w.bitsPerPixel, NULL );
 102 }
 103
 104
 105 /***********************************************************************
 106  *           CreateBitmapIndirect    (GDI.49)
 107  */
 108 HBITMAP CreateBitmapIndirect( BITMAP * bmp )
 109 {
 110     BITMAPOBJ * bmpObjPtr;
 111     HBITMAP hbitmap;
 112
 113       /* Check parameters */
 114     if (!bmp->bmHeight || !bmp->bmWidth) return 0;
 115     if (bmp->bmPlanes != 1) return 0;
 116     if ((bmp->bmBitsPixel != 1) && (bmp->bmBitsPixel != screenDepth)) return 0;
 117
 118     if (bmp->bmHeight < 0)
 119         bmp->bmHeight = -bmp->bmHeight;
 120
 121     if (bmp->bmWidth < 0)
 122         bmp->bmWidth = -bmp->bmWidth;
 123
 124
 125       /* Create the BITMAPOBJ */
 126     hbitmap = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC );
 127     if (!hbitmap) return 0;
 128     bmpObjPtr = (BITMAPOBJ *) GDI_HEAP_ADDR( hbitmap );
 129
 130     bmpObjPtr->size.cx = 0;
 131     bmpObjPtr->size.cy = 0;
 132     bmpObjPtr->bitmap  = *bmp;
 133     bmpObjPtr->bitmap.bmBits = NULL;
 134     bmpObjPtr->bitmap.bmWidthBytes = (bmp->bmWidth*bmp->bmBitsPixel+15)/16 * 2;
 135
 136       /* Create the pixmap */
 137     bmpObjPtr->pixmap = XCreatePixmap( display, rootWindow, bmp->bmWidth,
 138                                        bmp->bmHeight, bmp->bmBitsPixel );
 139     if (!bmpObjPtr->pixmap)
 140     {
 141         GDI_HEAP_FREE( hbitmap );
 142         hbitmap = 0;
 143     }
 144     else if (bmp->bmBits)  /* Set bitmap bits */
 145         SetBitmapBits( hbitmap, bmp->bmHeight*bmp->bmWidthBytes, bmp->bmBits );
 146     return hbitmap;
 147 }
 148
 149
 150 /***********************************************************************
 151  *           GetBitmapBits    (GDI.74)
 152  */
 153 LONG GetBitmapBits( HBITMAP hbitmap, LONG count, LPSTR buffer )
 154 {
 155     BITMAPOBJ * bmp;
 156     LONG height;
 157     XImage * image;
 158
 159     bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 160     if (!bmp) return 0;
 161
 162 #ifdef DEBUG_BITMAP
 163     printf( "GetBitmapBits: %dx%d %d colors %p\n",
 164             bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 165             1 << bmp->bitmap.bmBitsPixel, buffer );
 166 #endif
 167       /* Only get entire lines */
 168     height = count / bmp->bitmap.bmWidthBytes;
 169     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 170     if (!height) return 0;
 171
 172     if (!(image = BITMAP_BmpToImage( &bmp->bitmap, buffer ))) return 0;
 173     XGetSubImage( display, bmp->pixmap, 0, 0, bmp->bitmap.bmWidth, height,
 174                   AllPlanes, ZPixmap, image, 0, 0 );
 175     image->data = NULL;
 176     XDestroyImage( image );
 177     return height * bmp->bitmap.bmWidthBytes;
 178 }
 179
 180
 181 /***********************************************************************
 182  *           SetBitmapBits    (GDI.106)
 183  */
 184 LONG SetBitmapBits( HBITMAP hbitmap, LONG count, LPSTR buffer )
 185 {
 186     BITMAPOBJ * bmp;
 187     LONG height;
 188     XImage * image;
 189
 190     bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 191     if (!bmp) return 0;
 192
 193 #ifdef DEBUG_BITMAP
 194     printf( "SetBitmapBits: %dx%d %d colors %p\n",
 195             bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 196             1 << bmp->bitmap.bmBitsPixel, buffer );
 197 #endif
 198       /* Only set entire lines */
 199     height = count / bmp->bitmap.bmWidthBytes;
 200     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 201     if (!height) return 0;
 202
 203     if (!(image = BITMAP_BmpToImage( &bmp->bitmap, buffer ))) return 0;
 204     XPutImage( display, bmp->pixmap, BITMAP_GC(bmp), image, 0, 0,
 205                0, 0, bmp->bitmap.bmWidth, height );
 206     image->data = NULL;
 207     XDestroyImage( image );
 208     return height * bmp->bitmap.bmWidthBytes;
 209 }
 210
 211
 212 /***********************************************************************
 213  *           BMP_DeleteObject
 214  */
 215 BOOL BMP_DeleteObject( HBITMAP hbitmap, BITMAPOBJ * bitmap )
 216 {
 217     XFreePixmap( display, bitmap->pixmap );
 218     return GDI_FreeObject( hbitmap );
 219 }
 220
 221
 222 /***********************************************************************
 223  *           BMP_GetObject
 224  */
 225 int BMP_GetObject( BITMAPOBJ * bmp, int count, LPSTR buffer )
 226 {
 227     if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 228     memcpy( buffer, &bmp->bitmap, count );
 229     return count;
 230 }
 231
 232
 233 /***********************************************************************
 234  *           BITMAP_SelectObject
 235  */
 236 HBITMAP BITMAP_SelectObject( HDC hdc, DC * dc, HBITMAP hbitmap,
 237                              BITMAPOBJ * bmp )
 238 {
 239     HBITMAP prevHandle = dc->w.hBitmap;
 240
 241     if (!(dc->w.flags & DC_MEMORY)) return 0;
 242     dc->u.x.drawable = bmp->pixmap;
 243     dc->w.DCSizeX    = bmp->bitmap.bmWidth;
 244     dc->w.DCSizeY    = bmp->bitmap.bmHeight;
 245     dc->w.hBitmap    = hbitmap;
 246
 247       /* Change GC depth if needed */
 248
 249     if (dc->w.bitsPerPixel != bmp->bitmap.bmBitsPixel)
 250     {
 251         XFreeGC( display, dc->u.x.gc );
 252         dc->u.x.gc = XCreateGC( display, dc->u.x.drawable, 0, NULL );
 253         dc->w.bitsPerPixel = bmp->bitmap.bmBitsPixel;
 254           /* Re-select objects with changed depth */
 255         SelectObject( hdc, dc->w.hPen );
 256         SelectObject( hdc, dc->w.hBrush );
 257     }
 258     return prevHandle;
 259 }
 260
 261 /***********************************************************************
 262  *           CreateDiscardableBitmap    (GDI.156)
 263  */
 264 HBITMAP CreateDiscardableBitmap(HDC hdc, short width, short height)
 265 {
 266     printf("CreateDiscardableBitmap(%04X, %d, %d); "
 267            "// call CreateCompatibleBitmap() for now!\n",
 268            hdc, width, height);
 269     return CreateCompatibleBitmap(hdc, width, height);
 270 }
 271
 272 /***********************************************************************
 273  *           GetBitmapDimensionEx    (GDI.468)
 274  */
 275 BOOL GetBitmapDimensionEx( HBITMAP hbitmap, LPSIZE size )
 276 {
 277     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 278     if (!bmp) return FALSE;
 279     *size = bmp->size;
 280     return TRUE;
 281 }
 282
 283
 284 /***********************************************************************
 285  *           GetBitmapDimension    (GDI.162)
 286  */
 287 DWORD GetBitmapDimension( HBITMAP hbitmap )
 288 {
 289     SIZE size;
 290     if (!GetBitmapDimensionEx( hbitmap, &size )) return 0;
 291     return size.cx | (size.cy << 16);
 292 }
 293
 294 /***********************************************************************
 295  *           SetBitmapDimensionEx    (GDI.478)
 296  */
 297 BOOL SetBitmapDimensionEx( HBITMAP hbitmap, short x, short y, LPSIZE prevSize )
 298 {
 299     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 300     if (!bmp) return FALSE;
 301     if (prevSize) *prevSize = bmp->size;
 302     bmp->size.cx = x;
 303     bmp->size.cy = y;
 304     return TRUE;
 305 }
 306
 307
 308 /***********************************************************************
 309  *           SetBitmapDimension    (GDI.163)
 310  */
 311 DWORD SetBitmapDimension( HBITMAP hbitmap, short x, short y )
 312 {
 313     SIZE size;
 314     if (!SetBitmapDimensionEx( hbitmap, x, y, &size )) return 0;
 315     return size.cx | (size.cy << 16);
 316 }