424 lines
12 KiB
C
424 lines
12 KiB
C
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/*
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* GDI bitmap objects
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*
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* Copyright 1993 Alexandre Julliard
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*/
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static char Copyright[] = "Copyright Alexandre Julliard, 1993";
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#include "gdi.h"
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/* A GDI bitmap object contains a handle to a packed BITMAP,
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* which is stored on the global heap.
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* A packed BITMAP is a BITMAP structure followed by the bitmap bits.
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*/
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/* Handle of the bitmap selected by default in a memory DC */
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HBITMAP BITMAP_hbitmapMemDC;
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/* List of supported depths */
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static int depthCount;
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static int * depthList;
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/* List of GC used for bitmap to pixmap operations (one for each depth) */
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static GC * bitmapGC;
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/***********************************************************************
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* BITMAP_Init
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*/
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BOOL BITMAP_Init()
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{
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int i;
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Pixmap tmpPixmap;
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depthList = XListDepths( XT_display, DefaultScreen(XT_display),
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&depthCount );
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if (!depthList || !depthCount) return FALSE;
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if (!(bitmapGC = (GC *) malloc( depthCount * sizeof(GC) ))) return FALSE;
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/* Create the necessary GCs */
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for (i = 0; i < depthCount; i++)
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{
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tmpPixmap = XCreatePixmap( XT_display, DefaultRootWindow(XT_display),
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1, 1, depthList[i] );
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if (tmpPixmap)
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{
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bitmapGC[i] = XCreateGC( XT_display, tmpPixmap, 0, NULL );
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XFreePixmap( XT_display, tmpPixmap );
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}
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else bitmapGC[i] = 0;
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}
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BITMAP_hbitmapMemDC = CreateBitmap( 1, 1, 1, 1, NULL );
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return (BITMAP_hbitmapMemDC != 0);
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}
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/***********************************************************************
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* BITMAP_FindGCForDepth
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*
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* Return a GC appropriate for operations with the given depth.
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*/
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GC BITMAP_FindGCForDepth( int depth )
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{
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int i;
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for (i = 0; i < depthCount; i++)
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if (depthList[i] == depth) return bitmapGC[i];
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return 0;
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}
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/***********************************************************************
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* BITMAP_BmpToImage
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*
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* Create an XImage pointing to the bitmap data.
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*/
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XImage * BITMAP_BmpToImage( BITMAP * bmp, void * bmpData )
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{
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XImage * image;
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image = XCreateImage( XT_display, DefaultVisualOfScreen(XT_screen),
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bmp->bmBitsPixel, ZPixmap, 0, bmpData,
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bmp->bmWidth, bmp->bmHeight, 16, bmp->bmWidthBytes );
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if (!image) return 0;
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image->byte_order = MSBFirst;
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image->bitmap_bit_order = MSBFirst;
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image->bitmap_unit = 16;
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_XInitImageFuncPtrs(image);
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return image;
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}
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/***********************************************************************
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* BITMAP_CopyToPixmap
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*
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* Copy the content of the bitmap to the pixmap. Both must have the same depth.
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*/
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BOOL BITMAP_CopyToPixmap( BITMAP * bmp, Pixmap pixmap,
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int x, int y, int width, int height )
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{
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GC gc;
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XImage * image;
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gc = BITMAP_FindGCForDepth( bmp->bmBitsPixel );
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if (!gc) return FALSE;
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image = BITMAP_BmpToImage( bmp, ((char *)bmp) + sizeof(BITMAP) );
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if (!image) return FALSE;
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#ifdef DEBUG_GDI
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printf( "BITMAP_CopyToPixmap: %dx%d %d colors -> %d,%d %dx%d\n",
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bmp->bmWidth, bmp->bmHeight, 1 << bmp->bmBitsPixel, x, y, width, height );
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#endif
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XPutImage(XT_display, pixmap, gc, image, 0, 0, x, y, width, height);
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image->data = NULL;
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XDestroyImage( image );
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return TRUE;
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}
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/***********************************************************************
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* BITMAP_CopyFromPixmap
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*
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* Copy the content of the pixmap to the bitmap. Both must have
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* the same dimensions and depth.
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*/
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BOOL BITMAP_CopyFromPixmap( BITMAP * bmp, Pixmap pixmap )
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{
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XImage *image = BITMAP_BmpToImage( bmp, ((char *)bmp) + sizeof(BITMAP) );
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if (!image) return FALSE;
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#ifdef DEBUG_GDI
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printf( "BITMAP_CopyFromPixmap: %dx%d %d colors\n",
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bmp->bmWidth, bmp->bmHeight, 1 << bmp->bmBitsPixel );
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#endif
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XGetSubImage( XT_display, pixmap, 0, 0, bmp->bmWidth, bmp->bmHeight,
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AllPlanes, ZPixmap, image, 0, 0 );
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image->data = NULL;
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XDestroyImage( image );
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return TRUE;
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}
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/***********************************************************************
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* CreateBitmap (GDI.48)
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*/
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HBITMAP CreateBitmap( short width, short height,
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BYTE planes, BYTE bpp, LPSTR bits )
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{
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BITMAP bitmap = { 0, width, height, 0, planes, bpp, bits };
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#ifdef DEBUG_GDI
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printf( "CreateBitmap: %dx%d, %d colors\n",
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width, height, 1 << (planes*bpp) );
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#endif
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if (!width || !height) return 0;
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if ((planes != 1) && (bpp != 1)) return 0;
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bitmap.bmWidthBytes = (width * bpp + 15) / 16 * 2;
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return CreateBitmapIndirect( &bitmap );
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}
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/***********************************************************************
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* CreateCompatibleBitmap (GDI.51)
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*/
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HBITMAP CreateCompatibleBitmap( HDC hdc, short width, short height )
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{
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HBITMAP hbitmap;
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DC * dc;
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#ifdef DEBUG_GDI
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printf( "CreateCompatibleBitmap: %d %dx%d\n", hdc, width, height );
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#endif
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dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return 0;
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hbitmap = CreateBitmap( width, height, dc->w.planes, dc->w.bitsPerPixel, NULL);
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return hbitmap;
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}
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/***********************************************************************
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* CreateBitmapIndirect (GDI.49)
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*/
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HBITMAP CreateBitmapIndirect( BITMAP * bmp )
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{
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BITMAPOBJ * bmpObjPtr;
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char * bmpPtr;
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HBITMAP hbitmap;
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int size = bmp->bmPlanes * bmp->bmHeight * bmp->bmWidthBytes;
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/* Create the BITMAPOBJ */
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hbitmap = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC );
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if (!hbitmap) return 0;
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bmpObjPtr = (BITMAPOBJ *) GDI_HEAP_ADDR( hbitmap );
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/* Create the bitmap in global heap */
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bmpObjPtr->hBitmap = GlobalAlloc( GMEM_MOVEABLE, sizeof(BITMAP) + size );
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if (!bmpObjPtr->hBitmap)
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{
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GDI_FreeObject( hbitmap );
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return 0;
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}
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bmpPtr = (char *) GlobalLock( bmpObjPtr->hBitmap );
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memcpy( bmpPtr, bmp, sizeof(BITMAP) );
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((BITMAP *)bmpPtr)->bmBits = NULL;
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if (bmp->bmBits) memcpy( bmpPtr + sizeof(BITMAP), bmp->bmBits, size );
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GlobalUnlock( bmpObjPtr->hBitmap );
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bmpObjPtr->bSelected = FALSE;
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bmpObjPtr->hdc = 0;
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bmpObjPtr->size.cx = 0;
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bmpObjPtr->size.cy = 0;
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return hbitmap;
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}
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/***********************************************************************
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* BITMAP_GetSetBitmapBits
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*/
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LONG BITMAP_GetSetBitmapBits( HBITMAP hbitmap, LONG count,
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LPSTR buffer, int set )
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{
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BITMAPOBJ * bmpObjPtr;
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BITMAP * bmp;
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DC * dc = NULL;
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int maxSize;
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if (!count) return 0;
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bmpObjPtr = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
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if (!bmpObjPtr) return 0;
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if (!(bmp = (BITMAP *) GlobalLock( bmpObjPtr->hBitmap ))) return 0;
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if (bmpObjPtr->bSelected)
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dc = (DC *) GDI_GetObjPtr( bmpObjPtr->hdc, DC_MAGIC );
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maxSize = bmp->bmPlanes * bmp->bmHeight * bmp->bmWidthBytes;
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if (count > maxSize) count = maxSize;
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if (set)
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{
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memcpy( bmp+1, buffer, count );
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if (dc) BITMAP_CopyToPixmap( bmp, dc->u.x.drawable,
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0, 0, bmp->bmWidth, bmp->bmHeight );
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}
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else
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{
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if (dc) BITMAP_CopyFromPixmap( bmp, dc->u.x.drawable );
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memcpy( buffer, bmp+1, count );
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}
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GlobalUnlock( bmpObjPtr->hBitmap );
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return hbitmap;
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}
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/***********************************************************************
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* GetBitmapBits (GDI.74)
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*/
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LONG GetBitmapBits( HBITMAP hbitmap, LONG count, LPSTR buffer )
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{
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return BITMAP_GetSetBitmapBits( hbitmap, count, buffer, 0 );
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}
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/***********************************************************************
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* SetBitmapBits (GDI.106)
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*/
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LONG SetBitmapBits( HBITMAP hbitmap, LONG count, LPSTR buffer )
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{
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return BITMAP_GetSetBitmapBits( hbitmap, count, buffer, 1 );
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}
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/***********************************************************************
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* BMP_DeleteObject
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*/
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BOOL BMP_DeleteObject( HBITMAP hbitmap, BITMAPOBJ * bitmap )
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{
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/* Free bitmap on global heap */
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GlobalFree( bitmap->hBitmap );
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return GDI_FreeObject( hbitmap );
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}
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/***********************************************************************
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* BMP_GetObject
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*/
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int BMP_GetObject( BITMAPOBJ * bitmap, int count, LPSTR buffer )
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{
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char * bmpPtr = (char *) GlobalLock( bitmap->hBitmap );
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if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
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memcpy( buffer, bmpPtr, count );
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GlobalUnlock( bitmap->hBitmap );
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return count;
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}
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/***********************************************************************
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* BITMAP_UnselectBitmap
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*
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* Unselect the bitmap from the DC. Used by SelectObject and DeleteDC.
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*/
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BOOL BITMAP_UnselectBitmap( DC * dc )
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{
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BITMAPOBJ * bmp;
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BITMAP * bmpPtr;
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if (!dc->w.hBitmap) return TRUE;
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bmp = (BITMAPOBJ *) GDI_GetObjPtr( dc->w.hBitmap, BITMAP_MAGIC );
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if (!bmp) return FALSE;
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if (!(bmpPtr = (BITMAP *) GlobalLock( bmp->hBitmap ))) return FALSE;
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BITMAP_CopyFromPixmap( bmpPtr, dc->u.x.drawable );
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XFreePixmap( XT_display, dc->u.x.drawable );
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bmp->bSelected = FALSE;
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bmp->hdc = 0;
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GlobalUnlock( bmp->hBitmap );
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return TRUE;
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}
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/***********************************************************************
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* BITMAP_SelectObject
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*/
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HBITMAP BITMAP_SelectObject( HDC hdc, DC * dc, HBITMAP hbitmap,
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BITMAPOBJ * bitmap )
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{
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BITMAP * bmp;
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HBITMAP prevHandle = dc->w.hBitmap;
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if (!(dc->w.flags & DC_MEMORY)) return 0;
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if (bitmap->bSelected && hbitmap != BITMAP_hbitmapMemDC) return 0;
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if (!(bmp = (BITMAP *) GlobalLock( bitmap->hBitmap ))) return 0;
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/* Make sure the bitmap has the right format */
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if ((bmp->bmPlanes != 1) || !BITMAP_FindGCForDepth( bmp->bmBitsPixel ))
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{
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GlobalUnlock( bitmap->hBitmap );
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return 0;
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}
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/* Unselect the previous bitmap */
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if (!BITMAP_UnselectBitmap( dc ))
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{
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GlobalUnlock( bitmap->hBitmap );
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return 0;
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}
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/* Create the pixmap */
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dc->u.x.drawable = XCreatePixmap( XT_display,
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DefaultRootWindow( XT_display ),
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bmp->bmWidth, bmp->bmHeight,
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bmp->bmBitsPixel );
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BITMAP_CopyToPixmap( bmp, dc->u.x.drawable,
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0, 0, bmp->bmWidth, bmp->bmHeight );
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/* Change GC depth if needed */
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if (dc->w.bitsPerPixel != bmp->bmBitsPixel)
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{
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XFreeGC( XT_display, dc->u.x.gc );
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dc->u.x.gc = XCreateGC( XT_display, dc->u.x.drawable, 0, NULL );
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dc->w.bitsPerPixel = bmp->bmBitsPixel;
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DC_SetDeviceInfo( hdc, dc );
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}
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GlobalUnlock( bitmap->hBitmap );
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dc->w.hBitmap = hbitmap;
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bitmap->bSelected = TRUE;
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bitmap->hdc = hdc;
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return prevHandle;
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}
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/***********************************************************************
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* GetBitmapDimensionEx (GDI.468)
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*/
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BOOL GetBitmapDimensionEx( HBITMAP hbitmap, LPSIZE size )
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{
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BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
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if (!bmp) return FALSE;
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*size = bmp->size;
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return TRUE;
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}
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/***********************************************************************
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* GetBitmapDimension (GDI.162)
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*/
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DWORD GetBitmapDimension( HBITMAP hbitmap )
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{
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SIZE size;
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if (!GetBitmapDimensionEx( hbitmap, &size )) return 0;
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return size.cx | (size.cy << 16);
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}
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/***********************************************************************
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* SetBitmapDimensionEx (GDI.478)
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*/
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BOOL SetBitmapDimensionEx( HBITMAP hbitmap, short x, short y, LPSIZE prevSize )
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{
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BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
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if (!bmp) return FALSE;
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if (prevSize) *prevSize = bmp->size;
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bmp->size.cx = x;
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bmp->size.cy = y;
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return TRUE;
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}
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/***********************************************************************
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* SetBitmapDimension (GDI.163)
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*/
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DWORD SetBitmapDimension( HBITMAP hbitmap, short x, short y )
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{
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SIZE size;
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if (!SetBitmapDimensionEx( hbitmap, x, y, &size )) return 0;
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return size.cx | (size.cy << 16);
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}
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