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711 lines
20 KiB
C
711 lines
20 KiB
C
/*
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* GDI bitmap objects
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*
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* Copyright 1993 Alexandre Julliard
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* 1998 Huw D M Davies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "wine/winbase16.h"
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#include "wine/wingdi16.h"
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#include "gdi.h"
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#include "gdi_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
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static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc );
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static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
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static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer );
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static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj );
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static const struct gdi_obj_funcs bitmap_funcs =
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{
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BITMAP_SelectObject, /* pSelectObject */
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BITMAP_GetObject16, /* pGetObject16 */
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BITMAP_GetObject, /* pGetObjectA */
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BITMAP_GetObject, /* pGetObjectW */
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NULL, /* pUnrealizeObject */
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BITMAP_DeleteObject /* pDeleteObject */
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};
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/***********************************************************************
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* BITMAP_GetWidthBytes
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*
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* Return number of bytes taken by a scanline of 16-bit aligned Windows DDB
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* data.
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*/
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INT BITMAP_GetWidthBytes( INT bmWidth, INT bpp )
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{
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switch(bpp)
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{
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case 1:
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return 2 * ((bmWidth+15) >> 4);
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case 24:
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bmWidth *= 3; /* fall through */
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case 8:
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return bmWidth + (bmWidth & 1);
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case 32:
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return bmWidth * 4;
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case 16:
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case 15:
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return bmWidth * 2;
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case 4:
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return 2 * ((bmWidth+3) >> 2);
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default:
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WARN("Unknown depth %d, please report.\n", bpp );
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}
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return -1;
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}
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/******************************************************************************
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* CreateBitmap [GDI32.@]
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*
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* Creates a bitmap with the specified info.
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*
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* PARAMS
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* width [I] bitmap width
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* height [I] bitmap height
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* planes [I] Number of color planes
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* bpp [I] Number of bits to identify a color
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* bits [I] Pointer to array containing color data
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*
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* RETURNS
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* Success: Handle to bitmap
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* Failure: 0
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*/
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HBITMAP WINAPI CreateBitmap( INT width, INT height, UINT planes,
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UINT bpp, LPCVOID bits )
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{
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BITMAP bm;
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bm.bmType = 0;
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bm.bmWidth = width;
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bm.bmHeight = height;
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bm.bmWidthBytes = BITMAP_GetWidthBytes( width, bpp );
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bm.bmPlanes = planes;
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bm.bmBitsPixel = bpp;
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bm.bmBits = (LPVOID)bits;
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return CreateBitmapIndirect( &bm );
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}
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/******************************************************************************
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* CreateCompatibleBitmap [GDI32.@]
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*
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* Creates a bitmap compatible with the DC.
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*
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* PARAMS
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* hdc [I] Handle to device context
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* width [I] Width of bitmap
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* height [I] Height of bitmap
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*
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* RETURNS
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* Success: Handle to bitmap
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* Failure: 0
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*/
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HBITMAP WINAPI CreateCompatibleBitmap( HDC hdc, INT width, INT height)
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{
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HBITMAP hbmpRet = 0;
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DC *dc;
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TRACE("(%p,%d,%d) = \n", hdc, width, height);
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if ((width >= 0x10000) || (height >= 0x10000))
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{
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FIXME("got bad width %d or height %d, please look for reason\n",
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width, height);
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}
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else
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{
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if (!(dc = DC_GetDCPtr(hdc))) return 0;
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if (GDIMAGIC( dc->header.wMagic ) != MEMORY_DC_MAGIC)
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{
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hbmpRet = CreateBitmap(width, height,
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GetDeviceCaps(hdc, PLANES),
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GetDeviceCaps(hdc, BITSPIXEL),
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NULL);
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}
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else /* Memory DC */
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{
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BITMAPOBJ *bmp = GDI_GetObjPtr( dc->hBitmap, BITMAP_MAGIC );
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if (!bmp->dib)
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{
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/* A device-dependent bitmap is selected in the DC */
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hbmpRet = CreateBitmap(width, height,
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bmp->bitmap.bmPlanes,
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bmp->bitmap.bmBitsPixel,
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NULL);
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}
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else
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{
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/* A DIB section is selected in the DC */
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BITMAPINFO *bi;
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void *bits;
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/* Allocate memory for a BITMAPINFOHEADER structure and a
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color table. The maximum number of colors in a color table
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is 256 which corresponds to a bitmap with depth 8.
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Bitmaps with higher depths don't have color tables. */
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bi = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
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if (bi)
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{
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bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
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bi->bmiHeader.biWidth = width;
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bi->bmiHeader.biHeight = height;
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bi->bmiHeader.biPlanes = bmp->dib->dsBmih.biPlanes;
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bi->bmiHeader.biBitCount = bmp->dib->dsBmih.biBitCount;
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bi->bmiHeader.biCompression = bmp->dib->dsBmih.biCompression;
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bi->bmiHeader.biSizeImage = 0;
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bi->bmiHeader.biXPelsPerMeter = bmp->dib->dsBmih.biXPelsPerMeter;
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bi->bmiHeader.biYPelsPerMeter = bmp->dib->dsBmih.biYPelsPerMeter;
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bi->bmiHeader.biClrUsed = bmp->dib->dsBmih.biClrUsed;
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bi->bmiHeader.biClrImportant = bmp->dib->dsBmih.biClrImportant;
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if (bi->bmiHeader.biCompression == BI_BITFIELDS)
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{
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/* Copy the color masks */
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CopyMemory(bi->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD));
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}
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else if (bi->bmiHeader.biBitCount <= 8)
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{
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/* Copy the color table */
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GetDIBColorTable(hdc, 0, 256, bi->bmiColors);
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}
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hbmpRet = CreateDIBSection(hdc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
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HeapFree(GetProcessHeap(), 0, bi);
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}
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}
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GDI_ReleaseObj(dc->hBitmap);
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}
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GDI_ReleaseObj(hdc);
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}
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TRACE("\t\t%p\n", hbmpRet);
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return hbmpRet;
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}
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/******************************************************************************
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* CreateBitmapIndirect [GDI32.@]
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*
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* Creates a bitmap with the specified info.
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*
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* PARAMS
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* bmp [I] Pointer to the bitmap info describing the bitmap
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*
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* RETURNS
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* Success: Handle to bitmap
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* Failure: NULL. Use GetLastError() to determine the cause.
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*
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* NOTES
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* If a width or height of 0 are given, a 1x1 monochrome bitmap is returned.
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*/
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HBITMAP WINAPI CreateBitmapIndirect( const BITMAP *bmp )
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{
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BITMAP bm;
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BITMAPOBJ *bmpobj;
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HBITMAP hbitmap;
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if (!bmp || bmp->bmType || bmp->bmPlanes != 1)
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{
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if (bmp && bmp->bmPlanes != 1)
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FIXME("planes = %d\n", bmp->bmPlanes);
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SetLastError( ERROR_INVALID_PARAMETER );
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return NULL;
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}
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bm = *bmp;
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if (!bm.bmWidth || !bm.bmHeight)
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{
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bm.bmWidth = bm.bmHeight = 1;
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bm.bmPlanes = bm.bmBitsPixel = 1;
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bm.bmWidthBytes = 2;
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bm.bmBits = NULL;
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}
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else
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{
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if (bm.bmHeight < 0)
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bm.bmHeight = -bm.bmHeight;
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if (bm.bmWidth < 0)
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bm.bmWidth = -bm.bmWidth;
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}
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/* Create the BITMAPOBJ */
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bmpobj = GDI_AllocObject( sizeof(BITMAPOBJ), BITMAP_MAGIC,
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(HGDIOBJ *)&hbitmap, &bitmap_funcs );
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if (!bmpobj)
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{
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SetLastError( ERROR_NOT_ENOUGH_MEMORY );
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return NULL;
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}
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TRACE("%dx%d, %d colors returning %p\n", bm.bmWidth, bm.bmHeight,
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1 << (bm.bmPlanes * bm.bmBitsPixel), hbitmap);
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bmpobj->size.cx = 0;
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bmpobj->size.cy = 0;
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bmpobj->bitmap = bm;
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bmpobj->bitmap.bmBits = NULL;
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bmpobj->funcs = NULL;
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bmpobj->dib = NULL;
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bmpobj->segptr_bits = 0;
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if (bm.bmBits)
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SetBitmapBits( hbitmap, bm.bmHeight * bm.bmWidthBytes, bm.bmBits );
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GDI_ReleaseObj( hbitmap );
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return hbitmap;
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}
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/***********************************************************************
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* GetBitmapBits [GDI32.@]
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*
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* Copies bitmap bits of bitmap to buffer.
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*
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* RETURNS
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* Success: Number of bytes copied
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* Failure: 0
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*/
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LONG WINAPI GetBitmapBits(
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HBITMAP hbitmap, /* [in] Handle to bitmap */
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LONG count, /* [in] Number of bytes to copy */
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LPVOID bits) /* [out] Pointer to buffer to receive bits */
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{
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BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
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LONG height, ret;
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if (!bmp) return 0;
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/* If the bits vector is null, the function should return the read size */
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if(bits == NULL)
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{
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ret = bmp->bitmap.bmWidthBytes * bmp->bitmap.bmHeight;
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goto done;
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}
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if (count < 0) {
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WARN("(%ld): Negative number of bytes passed???\n", count );
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count = -count;
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}
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/* Only get entire lines */
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height = count / bmp->bitmap.bmWidthBytes;
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if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
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count = height * bmp->bitmap.bmWidthBytes;
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if (count == 0)
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{
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WARN("Less than one entire line requested\n");
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ret = 0;
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goto done;
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}
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TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
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hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
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1 << bmp->bitmap.bmBitsPixel, height );
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if(bmp->funcs && bmp->funcs->pGetBitmapBits)
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{
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TRACE("Calling device specific BitmapBits\n");
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ret = bmp->funcs->pGetBitmapBits(hbitmap, bits, count);
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} else {
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if(!bmp->bitmap.bmBits) {
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WARN("Bitmap is empty\n");
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ret = 0;
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} else {
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memcpy(bits, bmp->bitmap.bmBits, count);
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ret = count;
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}
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}
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done:
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GDI_ReleaseObj( hbitmap );
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return ret;
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}
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/******************************************************************************
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* SetBitmapBits [GDI32.@]
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*
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* Sets bits of color data for a bitmap.
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*
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* RETURNS
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* Success: Number of bytes used in setting the bitmap bits
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* Failure: 0
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*/
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LONG WINAPI SetBitmapBits(
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HBITMAP hbitmap, /* [in] Handle to bitmap */
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LONG count, /* [in] Number of bytes in bitmap array */
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LPCVOID bits) /* [in] Address of array with bitmap bits */
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{
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BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
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LONG height, ret;
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if ((!bmp) || (!bits))
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return 0;
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if (count < 0) {
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WARN("(%ld): Negative number of bytes passed???\n", count );
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count = -count;
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}
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/* Only get entire lines */
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height = count / bmp->bitmap.bmWidthBytes;
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if (height > bmp->bitmap.bmHeight) height = bmp->bitmap.bmHeight;
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count = height * bmp->bitmap.bmWidthBytes;
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TRACE("(%p, %ld, %p) %dx%d %d colors fetched height: %ld\n",
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hbitmap, count, bits, bmp->bitmap.bmWidth, bmp->bitmap.bmHeight,
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1 << bmp->bitmap.bmBitsPixel, height );
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if(bmp->funcs && bmp->funcs->pSetBitmapBits) {
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TRACE("Calling device specific BitmapBits\n");
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ret = bmp->funcs->pSetBitmapBits(hbitmap, bits, count);
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} else {
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if(!bmp->bitmap.bmBits) /* Alloc enough for entire bitmap */
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bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0, count );
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if(!bmp->bitmap.bmBits) {
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WARN("Unable to allocate bit buffer\n");
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ret = 0;
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} else {
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memcpy(bmp->bitmap.bmBits, bits, count);
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ret = count;
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}
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}
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GDI_ReleaseObj( hbitmap );
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return ret;
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}
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/**********************************************************************
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* BITMAP_CopyBitmap
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*
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*/
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HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
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{
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BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
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HBITMAP res = 0;
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BITMAP bm;
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if(!bmp) return 0;
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bm = bmp->bitmap;
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bm.bmBits = NULL;
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res = CreateBitmapIndirect(&bm);
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if(res) {
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char *buf = HeapAlloc( GetProcessHeap(), 0, bm.bmWidthBytes *
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bm.bmHeight );
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GetBitmapBits (hbitmap, bm.bmWidthBytes * bm.bmHeight, buf);
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SetBitmapBits (res, bm.bmWidthBytes * bm.bmHeight, buf);
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HeapFree( GetProcessHeap(), 0, buf );
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}
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GDI_ReleaseObj( hbitmap );
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return res;
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}
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/***********************************************************************
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* BITMAP_SetOwnerDC
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*
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* Set the type of DC that owns the bitmap. This is used when the
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* bitmap is selected into a device to initialize the bitmap function
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* table.
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*/
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BOOL BITMAP_SetOwnerDC( HBITMAP hbitmap, DC *dc )
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{
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BITMAPOBJ *bitmap;
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BOOL ret;
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/* never set the owner of the stock bitmap since it can be selected in multiple DCs */
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if (hbitmap == GetStockObject(DEFAULT_BITMAP)) return TRUE;
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if (!(bitmap = GDI_GetObjPtr( hbitmap, BITMAP_MAGIC ))) return FALSE;
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ret = TRUE;
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if (!bitmap->funcs) /* not owned by a DC yet */
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{
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if (dc->funcs->pCreateBitmap) ret = dc->funcs->pCreateBitmap( dc->physDev, hbitmap );
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if (ret) bitmap->funcs = dc->funcs;
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}
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else if (bitmap->funcs != dc->funcs)
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{
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FIXME( "Trying to select bitmap %p in different DC type\n", hbitmap );
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ret = FALSE;
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}
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GDI_ReleaseObj( hbitmap );
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return ret;
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}
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/***********************************************************************
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* BITMAP_SelectObject
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*/
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static HGDIOBJ BITMAP_SelectObject( HGDIOBJ handle, void *obj, HDC hdc )
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{
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HGDIOBJ ret;
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BITMAPOBJ *bitmap = obj;
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DC *dc = DC_GetDCPtr( hdc );
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if (!dc) return 0;
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if (GetObjectType( hdc ) != OBJ_MEMDC)
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{
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GDI_ReleaseObj( hdc );
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return 0;
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}
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ret = dc->hBitmap;
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if (handle == dc->hBitmap) goto done; /* nothing to do */
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if (bitmap->header.dwCount && (handle != GetStockObject(DEFAULT_BITMAP)))
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{
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WARN( "Bitmap already selected in another DC\n" );
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GDI_ReleaseObj( hdc );
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return 0;
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}
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if (!bitmap->funcs && !BITMAP_SetOwnerDC( handle, dc ))
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{
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GDI_ReleaseObj( hdc );
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return 0;
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}
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if (dc->funcs->pSelectBitmap) handle = dc->funcs->pSelectBitmap( dc->physDev, handle );
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if (handle)
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{
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dc->hBitmap = handle;
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dc->flags &= ~DC_DIRTY;
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SetRectRgn( dc->hVisRgn, 0, 0, bitmap->bitmap.bmWidth, bitmap->bitmap.bmHeight);
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DC_InitDC( dc );
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}
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else ret = 0;
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done:
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GDI_ReleaseObj( hdc );
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return ret;
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}
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/***********************************************************************
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* BITMAP_DeleteObject
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*/
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static BOOL BITMAP_DeleteObject( HGDIOBJ handle, void *obj )
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{
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BITMAPOBJ * bmp = obj;
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if (bmp->funcs && bmp->funcs->pDeleteBitmap)
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bmp->funcs->pDeleteBitmap( handle );
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|
|
|
HeapFree( GetProcessHeap(), 0, bmp->bitmap.bmBits );
|
|
|
|
if (bmp->dib)
|
|
{
|
|
DIBSECTION *dib = bmp->dib;
|
|
|
|
if (dib->dsBm.bmBits)
|
|
{
|
|
if (dib->dshSection)
|
|
{
|
|
SYSTEM_INFO SystemInfo;
|
|
GetSystemInfo( &SystemInfo );
|
|
UnmapViewOfFile( (char *)dib->dsBm.bmBits -
|
|
(dib->dsOffset % SystemInfo.dwAllocationGranularity) );
|
|
}
|
|
else if (!dib->dsOffset)
|
|
VirtualFree(dib->dsBm.bmBits, 0L, MEM_RELEASE );
|
|
}
|
|
HeapFree(GetProcessHeap(), 0, dib);
|
|
bmp->dib = NULL;
|
|
if (bmp->segptr_bits)
|
|
{ /* free its selector array */
|
|
WORD sel = SELECTOROF(bmp->segptr_bits);
|
|
WORD count = (GetSelectorLimit16(sel) / 0x10000) + 1;
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++) FreeSelector16(sel + (i << __AHSHIFT));
|
|
}
|
|
}
|
|
return GDI_FreeObject( handle, obj );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_GetObject16
|
|
*/
|
|
static INT BITMAP_GetObject16( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
|
|
{
|
|
BITMAPOBJ *bmp = obj;
|
|
|
|
if (bmp->dib)
|
|
{
|
|
if ( count <= sizeof(BITMAP16) )
|
|
{
|
|
BITMAP *bmp32 = &bmp->dib->dsBm;
|
|
BITMAP16 bmp16;
|
|
bmp16.bmType = bmp32->bmType;
|
|
bmp16.bmWidth = bmp32->bmWidth;
|
|
bmp16.bmHeight = bmp32->bmHeight;
|
|
bmp16.bmWidthBytes = bmp32->bmWidthBytes;
|
|
bmp16.bmPlanes = bmp32->bmPlanes;
|
|
bmp16.bmBitsPixel = bmp32->bmBitsPixel;
|
|
bmp16.bmBits = (SEGPTR)0;
|
|
memcpy( buffer, &bmp16, count );
|
|
return count;
|
|
}
|
|
else
|
|
{
|
|
FIXME("not implemented for DIBs: count %d\n", count);
|
|
return 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
BITMAP16 bmp16;
|
|
bmp16.bmType = bmp->bitmap.bmType;
|
|
bmp16.bmWidth = bmp->bitmap.bmWidth;
|
|
bmp16.bmHeight = bmp->bitmap.bmHeight;
|
|
bmp16.bmWidthBytes = bmp->bitmap.bmWidthBytes;
|
|
bmp16.bmPlanes = bmp->bitmap.bmPlanes;
|
|
bmp16.bmBitsPixel = bmp->bitmap.bmBitsPixel;
|
|
bmp16.bmBits = (SEGPTR)0;
|
|
if (count > sizeof(bmp16)) count = sizeof(bmp16);
|
|
memcpy( buffer, &bmp16, count );
|
|
return count;
|
|
}
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* BITMAP_GetObject
|
|
*/
|
|
static INT BITMAP_GetObject( HGDIOBJ handle, void *obj, INT count, LPVOID buffer )
|
|
{
|
|
BITMAPOBJ *bmp = obj;
|
|
|
|
if (bmp->dib)
|
|
{
|
|
if( !buffer )
|
|
return sizeof(DIBSECTION);
|
|
if (count < sizeof(DIBSECTION))
|
|
{
|
|
if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
|
|
}
|
|
else
|
|
{
|
|
if (count > sizeof(DIBSECTION)) count = sizeof(DIBSECTION);
|
|
}
|
|
|
|
memcpy( buffer, bmp->dib, count );
|
|
return count;
|
|
}
|
|
else
|
|
{
|
|
if( !buffer )
|
|
return sizeof(BITMAP);
|
|
if (count > sizeof(BITMAP)) count = sizeof(BITMAP);
|
|
memcpy( buffer, &bmp->bitmap, count );
|
|
return count;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* CreateDiscardableBitmap [GDI32.@]
|
|
*
|
|
* Creates a discardable bitmap.
|
|
*
|
|
* RETURNS
|
|
* Success: Handle to bitmap
|
|
* Failure: NULL
|
|
*/
|
|
HBITMAP WINAPI CreateDiscardableBitmap(
|
|
HDC hdc, /* [in] Handle to device context */
|
|
INT width, /* [in] Bitmap width */
|
|
INT height) /* [in] Bitmap height */
|
|
{
|
|
return CreateCompatibleBitmap( hdc, width, height );
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* GetBitmapDimensionEx [GDI32.@]
|
|
*
|
|
* Retrieves dimensions of a bitmap.
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE
|
|
* Failure: FALSE
|
|
*/
|
|
BOOL WINAPI GetBitmapDimensionEx(
|
|
HBITMAP hbitmap, /* [in] Handle to bitmap */
|
|
LPSIZE size) /* [out] Address of struct receiving dimensions */
|
|
{
|
|
BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
|
|
if (!bmp) return FALSE;
|
|
*size = bmp->size;
|
|
GDI_ReleaseObj( hbitmap );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* SetBitmapDimensionEx [GDI32.@]
|
|
*
|
|
* Assigns dimensions to a bitmap.
|
|
* MSDN says that this function will fail if hbitmap is a handle created by
|
|
* CreateDIBSection, but that's not true on Windows 2000.
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE
|
|
* Failure: FALSE
|
|
*/
|
|
BOOL WINAPI SetBitmapDimensionEx(
|
|
HBITMAP hbitmap, /* [in] Handle to bitmap */
|
|
INT x, /* [in] Bitmap width */
|
|
INT y, /* [in] Bitmap height */
|
|
LPSIZE prevSize) /* [out] Address of structure for orig dims */
|
|
{
|
|
BITMAPOBJ * bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
|
|
if (!bmp) return FALSE;
|
|
if (prevSize) *prevSize = bmp->size;
|
|
bmp->size.cx = x;
|
|
bmp->size.cy = y;
|
|
GDI_ReleaseObj( hbitmap );
|
|
return TRUE;
|
|
}
|