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(XT_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       /* Create the BITMAPOBJ */
 119     hbitmap = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC );
 120     if (!hbitmap) return 0;
 121     bmpObjPtr = (BITMAPOBJ *) GDI_HEAP_ADDR( hbitmap );
 122
 123     bmpObjPtr->size.cx = 0;
 124     bmpObjPtr->size.cy = 0;
 125     bmpObjPtr->bitmap  = *bmp;
 126     bmpObjPtr->bitmap.bmBits = NULL;
 127     bmpObjPtr->bitmap.bmWidthBytes = (bmp->bmWidth*bmp->bmBitsPixel+15)/16 * 2;
 128
 129       /* Create the pixmap */
 130     bmpObjPtr->pixmap = XCreatePixmap( display, rootWindow, bmp->bmWidth,
 131                                        bmp->bmHeight, bmp->bmBitsPixel );
 132     if (!bmpObjPtr->pixmap)
 133     {
 134         GDI_HEAP_FREE( hbitmap );
 135         hbitmap = 0;
 136     }
 137     else if (bmp->bmBits)  /* Set bitmap bits */
 138         SetBitmapBits( hbitmap, bmp->bmHeight*bmp->bmWidthBytes, bmp->bmBits );
 139     return hbitmap;
 140 }
 141
 142
 143 /***********************************************************************
 144  *           GetBitmapBits    (GDI.74)
 145  */
 146 LONG GetBitmapBits( HBITMAP hbitmap, LONG count, LPSTR buffer )
 147 {
 148     BITMAPOBJ * bmp;
 149     LONG height;
 150     XImage * image;
 151
 152     bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 153     if (!bmp) return 0;
 154
 155 #ifdef DEBUG_BITMAP
 156     printf( "GetBitmapBits: %dx%d %d colors %p\n",
 157             bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 158             1 << bmp->bitmap.bmBitsPixel, buffer );
 159 #endif
 160       /* Only get entire lines */
 161     height = count / bmp->bitmap.bmWidthBytes;
 162     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 163     if (!height) return 0;
 164
 165     if (!(image = BITMAP_BmpToImage( &bmp->bitmap, buffer ))) return 0;
 166     XGetSubImage( display, bmp->pixmap, 0, 0, bmp->bitmap.bmWidth, height,
 167                   AllPlanes, ZPixmap, image, 0, 0 );
 168     image->data = NULL;
 169     XDestroyImage( image );
 170     return height * bmp->bitmap.bmWidthBytes;
 171 }
 172
 173
 174 /***********************************************************************
 175  *           SetBitmapBits    (GDI.106)
 176  */
 177 LONG SetBitmapBits( HBITMAP hbitmap, LONG count, LPSTR buffer )
 178 {
 179     BITMAPOBJ * bmp;
 180     LONG height;
 181     XImage * image;
 182
 183     bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 184     if (!bmp) return 0;
 185
 186 #ifdef DEBUG_BITMAP
 187     printf( "SetBitmapBits: %dx%d %d colors %p\n",
 188             bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
 189             1 << bmp->bitmap.bmBitsPixel, buffer );
 190 #endif
 191       /* Only set entire lines */
 192     height = count / bmp->bitmap.bmWidthBytes;
 193     if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
 194     if (!height) return 0;
 195
 196     if (!(image = BITMAP_BmpToImage( &bmp->bitmap, buffer ))) return 0;
 197     XPutImage( display, bmp->pixmap, BITMAP_GC(bmp), image, 0, 0,
 198                0, 0, bmp->bitmap.bmWidth, height );
 199     image->data = NULL;
 200     XDestroyImage( image );
 201     return height * bmp->bitmap.bmWidthBytes;
 202 }
 203
 204
 205 /***********************************************************************
 206  *           BMP_DeleteObject
 207  */
 208 BOOL BMP_DeleteObject( HBITMAP hbitmap, BITMAPOBJ * bitmap )
 209 {
 210     XFreePixmap( display, bitmap->pixmap );
 211     return GDI_FreeObject( hbitmap );
 212 }
 213
 214
 215 /***********************************************************************
 216  *           BMP_GetObject
 217  */
 218 int BMP_GetObject( BITMAPOBJ * bmp, int count, LPSTR buffer )
 219 {
 220     if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
 221     memcpy( buffer, &bmp->bitmap, count );
 222     return count;
 223 }
 224
 225
 226 /***********************************************************************
 227  *           BITMAP_SelectObject
 228  */
 229 HBITMAP BITMAP_SelectObject( HDC hdc, DC * dc, HBITMAP hbitmap,
 230                              BITMAPOBJ * bmp )
 231 {
 232     HBITMAP prevHandle = dc->w.hBitmap;
 233
 234     if (!(dc->w.flags & DC_MEMORY)) return 0;
 235     dc->u.x.drawable = bmp->pixmap;
 236     dc->w.DCSizeX    = bmp->bitmap.bmWidth;
 237     dc->w.DCSizeY    = bmp->bitmap.bmHeight;
 238     dc->w.hBitmap    = hbitmap;
 239
 240       /* Change GC depth if needed */
 241
 242     if (dc->w.bitsPerPixel != bmp->bitmap.bmBitsPixel)
 243     {
 244         XFreeGC( display, dc->u.x.gc );
 245         dc->u.x.gc = XCreateGC( display, dc->u.x.drawable, 0, NULL );
 246         dc->w.bitsPerPixel = bmp->bitmap.bmBitsPixel;
 247           /* Re-select objects with changed depth */
 248         SelectObject( hdc, dc->w.hPen );
 249         SelectObject( hdc, dc->w.hBrush );
 250     }
 251     return prevHandle;
 252 }
 253
 254
 255 /***********************************************************************
 256  *           GetBitmapDimensionEx    (GDI.468)
 257  */
 258 BOOL GetBitmapDimensionEx( HBITMAP hbitmap, LPSIZE size )
 259 {
 260     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 261     if (!bmp) return FALSE;
 262     *size = bmp->size;
 263     return TRUE;
 264 }
 265
 266
 267 /***********************************************************************
 268  *           GetBitmapDimension    (GDI.162)
 269  */
 270 DWORD GetBitmapDimension( HBITMAP hbitmap )
 271 {
 272     SIZE size;
 273     if (!GetBitmapDimensionEx( hbitmap, &size )) return 0;
 274     return size.cx | (size.cy << 16);
 275 }
 276
 277 /***********************************************************************
 278  *           SetBitmapDimensionEx    (GDI.478)
 279  */
 280 BOOL SetBitmapDimensionEx( HBITMAP hbitmap, short x, short y, LPSIZE prevSize )
 281 {
 282     BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
 283     if (!bmp) return FALSE;
 284     if (prevSize) *prevSize = bmp->size;
 285     bmp->size.cx = x;
 286     bmp->size.cy = y;
 287     return TRUE;
 288 }
 289
 290
 291 /***********************************************************************
 292  *           SetBitmapDimension    (GDI.163)
 293  */
 294 DWORD SetBitmapDimension( HBITMAP hbitmap, short x, short y )
 295 {
 296     SIZE size;
 297     if (!SetBitmapDimensionEx( hbitmap, x, y, &size )) return 0;
 298     return size.cx | (size.cy << 16);
 299 }