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/*
* GDI device-independent bitmaps
*
* Copyright 1993,1994 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/*
Important information:
* Current Windows versions support two different DIB structures:
- BITMAPCOREINFO / BITMAPCOREHEADER (legacy structures; used in OS/2)
- BITMAPINFO / BITMAPINFOHEADER
Most Windows API functions taking a BITMAPINFO* / BITMAPINFOHEADER* also
accept the old "core" structures, and so must WINE.
You can distinguish them by looking at the first member (bcSize/biSize),
or use the internal function DIB_GetBitmapInfo.
* The palettes are stored in different formats:
- BITMAPCOREINFO: Array of RGBTRIPLE
- BITMAPINFO: Array of RGBQUAD
* There are even more DIB headers, but they all extend BITMAPINFOHEADER:
- BITMAPV4HEADER: Introduced in Windows 95 / NT 4.0
- BITMAPV5HEADER: Introduced in Windows 98 / 2000
If biCompression is BI_BITFIELDS, the color masks are at the same position
in all the headers (they start at bmiColors of BITMAPINFOHEADER), because
the new headers have structure members for the masks.
* You should never access the color table using the bmiColors member,
because the passed structure may have one of the extended headers
mentioned above. Use this to calculate the location:
BITMAPINFO* info;
void* colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize;
* More information:
Search for "Bitmap Structures" in MSDN
*/
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "gdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
/*
Some of the following helper functions are duplicated in
dlls/x11drv/dib.c
*/
/***********************************************************************
* DIB_GetDIBWidthBytes
*
* Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
*/
int DIB_GetDIBWidthBytes( int width, int depth )
{
int words;
switch(depth)
{
case 1: words = (width + 31) / 32; break;
case 4: words = (width + 7) / 8; break;
case 8: words = (width + 3) / 4; break;
case 15:
case 16: words = (width + 1) / 2; break;
case 24: words = (width * 3 + 3)/4; break;
default:
WARN("(%d): Unsupported depth\n", depth );
/* fall through */
case 32:
words = width;
}
return 4 * words;
}
/***********************************************************************
* DIB_GetDIBImageBytes
*
* Return the number of bytes used to hold the image in a DIB bitmap.
*/
int DIB_GetDIBImageBytes( int width, int height, int depth )
{
return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
}
/***********************************************************************
* bitmap_info_size
*
* Return the size of the bitmap info structure including color table.
*/
int bitmap_info_size( const BITMAPINFO * info, WORD coloruse )
{
unsigned int colors, size, masks = 0;
if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)info;
colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
return sizeof(BITMAPCOREHEADER) + colors *
((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
}
else /* assume BITMAPINFOHEADER */
{
colors = info->bmiHeader.biClrUsed;
if (colors > 256) colors = 256;
if (!colors && (info->bmiHeader.biBitCount <= 8))
colors = 1 << info->bmiHeader.biBitCount;
if (info->bmiHeader.biCompression == BI_BITFIELDS) masks = 3;
size = max( info->bmiHeader.biSize, sizeof(BITMAPINFOHEADER) + masks * sizeof(DWORD) );
return size + colors * ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
}
}
/***********************************************************************
* DIB_GetBitmapInfo
*
* Get the info from a bitmap header.
* Return 0 for COREHEADER, 1 for INFOHEADER, -1 for error.
*/
int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, LONG *width,
LONG *height, WORD *planes, WORD *bpp, DWORD *compr, DWORD *size )
{
if (header->biSize == sizeof(BITMAPCOREHEADER))
{
const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)header;
*width = core->bcWidth;
*height = core->bcHeight;
*planes = core->bcPlanes;
*bpp = core->bcBitCount;
*compr = 0;
*size = 0;
return 0;
}
if (header->biSize >= sizeof(BITMAPINFOHEADER)) /* assume BITMAPINFOHEADER */
{
*width = header->biWidth;
*height = header->biHeight;
*planes = header->biPlanes;
*bpp = header->biBitCount;
*compr = header->biCompression;
*size = header->biSizeImage;
return 1;
}
ERR("(%d): unknown/wrong size for header\n", header->biSize );
return -1;
}
/* nulldrv fallback implementation using SetDIBits/StretchBlt */
INT CDECL nulldrv_StretchDIBits( PHYSDEV dev, INT xDst, INT yDst, INT widthDst, INT heightDst,
INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, const void *bits,
const BITMAPINFO *info, UINT coloruse, DWORD rop )
{
DC *dc = get_nulldrv_dc( dev );
INT ret;
LONG width, height;
WORD planes, bpp;
DWORD compr, size;
HBITMAP hBitmap;
HDC hdcMem;
/* make sure we have a real implementation for StretchBlt and SetDIBits */
if (GET_DC_PHYSDEV( dc, pStretchBlt ) == dev || GET_DC_PHYSDEV( dc, pSetDIBits ) == dev)
return 0;
if (DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size ) == -1)
return 0;
if (width < 0) return 0;
if (xSrc == 0 && ySrc == 0 && widthDst == widthSrc && heightDst == heightSrc &&
info->bmiHeader.biCompression == BI_RGB)
{
/* Windows appears to have a fast case optimization
* that uses the wrong origin for top-down DIBs */
if (height < 0 && heightSrc < abs(height)) ySrc = abs(height) - heightSrc;
if (xDst == 0 && yDst == 0 && info->bmiHeader.biCompression == BI_RGB && rop == SRCCOPY)
{
BITMAP bm;
hBitmap = GetCurrentObject( dev->hdc, OBJ_BITMAP );
if (GetObjectW( hBitmap, sizeof(bm), &bm ) &&
bm.bmWidth == widthSrc && bm.bmHeight == heightSrc &&
bm.bmBitsPixel == bpp && bm.bmPlanes == planes)
{
/* fast path */
return SetDIBits( dev->hdc, hBitmap, 0, height, bits, info, coloruse );
}
}
}
hdcMem = CreateCompatibleDC( dev->hdc );
hBitmap = CreateCompatibleBitmap( dev->hdc, width, height );
SelectObject( hdcMem, hBitmap );
if (coloruse == DIB_PAL_COLORS)
SelectPalette( hdcMem, GetCurrentObject( dev->hdc, OBJ_PAL ), FALSE );
if (info->bmiHeader.biCompression == BI_RLE4 || info->bmiHeader.biCompression == BI_RLE8)
{
/* when RLE compression is used, there may be some gaps (ie the DIB doesn't
* contain all the rectangle described in bmiHeader, but only part of it.
* This mean that those undescribed pixels must be left untouched.
* So, we first copy on a memory bitmap the current content of the
* destination rectangle, blit the DIB bits on top of it - hence leaving
* the gaps untouched -, and blitting the rectangle back.
* This insure that gaps are untouched on the destination rectangle
*/
StretchBlt( hdcMem, xSrc, abs(height) - heightSrc - ySrc, widthSrc, heightSrc,
dev->hdc, xDst, yDst, widthDst, heightDst, rop );
}
ret = SetDIBits( hdcMem, hBitmap, 0, height, bits, info, coloruse );
if (ret) StretchBlt( dev->hdc, xDst, yDst, widthDst, heightDst,
hdcMem, xSrc, abs(height) - heightSrc - ySrc, widthSrc, heightSrc, rop );
DeleteDC( hdcMem );
DeleteObject( hBitmap );
return ret;
}
/***********************************************************************
* StretchDIBits (GDI32.@)
*/
INT WINAPI StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst, INT heightDst,
INT xSrc, INT ySrc, INT widthSrc, INT heightSrc, const void *bits,
const BITMAPINFO *info, UINT coloruse, DWORD rop )
{
DC *dc;
INT ret = 0;
if (!bits || !info) return 0;
if ((dc = get_dc_ptr( hdc )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pStretchDIBits );
update_dc( dc );
ret = physdev->funcs->pStretchDIBits( physdev, xDst, yDst, widthDst, heightDst,
xSrc, ySrc, widthSrc, heightSrc, bits, info, coloruse, rop );
release_dc_ptr( dc );
}
return ret;
}
/******************************************************************************
* SetDIBits [GDI32.@]
*
* Sets pixels in a bitmap using colors from DIB.
*
* PARAMS
* hdc [I] Handle to device context
* hbitmap [I] Handle to bitmap
* startscan [I] Starting scan line
* lines [I] Number of scan lines
* bits [I] Array of bitmap bits
* info [I] Address of structure with data
* coloruse [I] Type of color indexes to use
*
* RETURNS
* Success: Number of scan lines copied
* Failure: 0
*/
INT WINAPI SetDIBits( HDC hdc, HBITMAP hbitmap, UINT startscan,
UINT lines, LPCVOID bits, const BITMAPINFO *info,
UINT coloruse )
{
DC *dc = get_dc_ptr( hdc );
BOOL delete_hdc = FALSE;
PHYSDEV physdev;
BITMAPOBJ *bitmap;
INT result = 0;
if (coloruse == DIB_RGB_COLORS && !dc)
{
hdc = CreateCompatibleDC(0);
dc = get_dc_ptr( hdc );
delete_hdc = TRUE;
}
if (!dc) return 0;
update_dc( dc );
if (!(bitmap = GDI_GetObjPtr( hbitmap, OBJ_BITMAP )))
{
release_dc_ptr( dc );
if (delete_hdc) DeleteDC(hdc);
return 0;
}
physdev = GET_DC_PHYSDEV( dc, pSetDIBits );
if (BITMAP_SetOwnerDC( hbitmap, physdev ))
result = physdev->funcs->pSetDIBits( physdev, hbitmap, startscan, lines, bits, info, coloruse );
GDI_ReleaseObj( hbitmap );
release_dc_ptr( dc );
if (delete_hdc) DeleteDC(hdc);
return result;
}
/***********************************************************************
* SetDIBitsToDevice (GDI32.@)
*/
INT WINAPI SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
DWORD cy, INT xSrc, INT ySrc, UINT startscan,
UINT lines, LPCVOID bits, const BITMAPINFO *info,
UINT coloruse )
{
INT ret = 0;
DC *dc;
if (!bits) return 0;
if ((dc = get_dc_ptr( hdc )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDIBitsToDevice );
update_dc( dc );
ret = physdev->funcs->pSetDIBitsToDevice( physdev, xDest, yDest, cx, cy, xSrc,
ySrc, startscan, lines, bits, info, coloruse );
release_dc_ptr( dc );
}
return ret;
}
/***********************************************************************
* SetDIBColorTable (GDI32.@)
*/
UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries, CONST RGBQUAD *colors )
{
DC * dc;
UINT result = 0;
BITMAPOBJ * bitmap;
if (!(dc = get_dc_ptr( hdc ))) return 0;
if ((bitmap = GDI_GetObjPtr( dc->hBitmap, OBJ_BITMAP )))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDIBColorTable );
/* Check if currently selected bitmap is a DIB */
if (bitmap->color_table)
{
if (startpos < bitmap->nb_colors)
{
if (startpos + entries > bitmap->nb_colors) entries = bitmap->nb_colors - startpos;
memcpy(bitmap->color_table + startpos, colors, entries * sizeof(RGBQUAD));
result = entries;
}
}
GDI_ReleaseObj( dc->hBitmap );
physdev->funcs->pSetDIBColorTable( physdev, startpos, entries, colors );
}
release_dc_ptr( dc );
return result;
}
/***********************************************************************
* GetDIBColorTable (GDI32.@)
*/
UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries, RGBQUAD *colors )
{
DC * dc;
BITMAPOBJ *bitmap;
UINT result = 0;
if (!(dc = get_dc_ptr( hdc ))) return 0;
if ((bitmap = GDI_GetObjPtr( dc->hBitmap, OBJ_BITMAP )))
{
/* Check if currently selected bitmap is a DIB */
if (bitmap->color_table)
{
if (startpos < bitmap->nb_colors)
{
if (startpos + entries > bitmap->nb_colors) entries = bitmap->nb_colors - startpos;
memcpy(colors, bitmap->color_table + startpos, entries * sizeof(RGBQUAD));
result = entries;
}
}
GDI_ReleaseObj( dc->hBitmap );
}
release_dc_ptr( dc );
return result;
}
static const RGBQUAD DefLogPaletteQuads[20] = { /* Copy of Default Logical Palette */
/* rgbBlue, rgbGreen, rgbRed, rgbReserved */
{ 0x00, 0x00, 0x00, 0x00 },
{ 0x00, 0x00, 0x80, 0x00 },
{ 0x00, 0x80, 0x00, 0x00 },
{ 0x00, 0x80, 0x80, 0x00 },
{ 0x80, 0x00, 0x00, 0x00 },
{ 0x80, 0x00, 0x80, 0x00 },
{ 0x80, 0x80, 0x00, 0x00 },
{ 0xc0, 0xc0, 0xc0, 0x00 },
{ 0xc0, 0xdc, 0xc0, 0x00 },
{ 0xf0, 0xca, 0xa6, 0x00 },
{ 0xf0, 0xfb, 0xff, 0x00 },
{ 0xa4, 0xa0, 0xa0, 0x00 },
{ 0x80, 0x80, 0x80, 0x00 },
{ 0x00, 0x00, 0xff, 0x00 },
{ 0x00, 0xff, 0x00, 0x00 },
{ 0x00, 0xff, 0xff, 0x00 },
{ 0xff, 0x00, 0x00, 0x00 },
{ 0xff, 0x00, 0xff, 0x00 },
{ 0xff, 0xff, 0x00, 0x00 },
{ 0xff, 0xff, 0xff, 0x00 }
};
/******************************************************************************
* GetDIBits [GDI32.@]
*
* Retrieves bits of bitmap and copies to buffer.
*
* RETURNS
* Success: Number of scan lines copied from bitmap
* Failure: 0
*/
INT WINAPI GetDIBits(
HDC hdc, /* [in] Handle to device context */
HBITMAP hbitmap, /* [in] Handle to bitmap */
UINT startscan, /* [in] First scan line to set in dest bitmap */
UINT lines, /* [in] Number of scan lines to copy */
LPVOID bits, /* [out] Address of array for bitmap bits */
BITMAPINFO * info, /* [out] Address of structure with bitmap data */
UINT coloruse) /* [in] RGB or palette index */
{
DC * dc;
BITMAPOBJ * bmp;
int i;
int bitmap_type;
BOOL core_header;
LONG width;
LONG height;
WORD planes, bpp;
DWORD compr, size;
void* colorPtr;
RGBQUAD quad_buf[256];
RGBQUAD* rgbQuads = quad_buf;
if (!info) return 0;
bitmap_type = DIB_GetBitmapInfo( &info->bmiHeader, &width, &height, &planes, &bpp, &compr, &size);
if (bitmap_type == -1)
{
ERR("Invalid bitmap format\n");
return 0;
}
core_header = (bitmap_type == 0);
if (!(dc = get_dc_ptr( hdc )))
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
update_dc( dc );
if (!(bmp = GDI_GetObjPtr( hbitmap, OBJ_BITMAP )))
{
release_dc_ptr( dc );
return 0;
}
colorPtr = (LPBYTE) info + (WORD) info->bmiHeader.biSize;
if(!core_header) rgbQuads = colorPtr;
/* Transfer color info */
switch (bpp)
{
case 0: /* query bitmap info only */
if (core_header)
{
BITMAPCOREHEADER* coreheader = (BITMAPCOREHEADER*) info;
coreheader->bcWidth = bmp->bitmap.bmWidth;
coreheader->bcHeight = bmp->bitmap.bmHeight;
coreheader->bcPlanes = 1;
coreheader->bcBitCount = bmp->bitmap.bmBitsPixel;
}
else
{
info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biSizeImage =
DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
bmp->bitmap.bmHeight,
bmp->bitmap.bmBitsPixel );
if (bmp->dib)
{
info->bmiHeader.biBitCount = bmp->dib->dsBm.bmBitsPixel;
switch (bmp->dib->dsBm.bmBitsPixel)
{
case 16:
case 32:
info->bmiHeader.biCompression = BI_BITFIELDS;
break;
default:
info->bmiHeader.biCompression = BI_RGB;
break;
}
}
else
{
info->bmiHeader.biCompression = (bmp->bitmap.bmBitsPixel > 8) ? BI_BITFIELDS : BI_RGB;
info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
}
info->bmiHeader.biXPelsPerMeter = 0;
info->bmiHeader.biYPelsPerMeter = 0;
info->bmiHeader.biClrUsed = 0;
info->bmiHeader.biClrImportant = 0;
/* Windows 2000 doesn't touch the additional struct members if
it's a BITMAPV4HEADER or a BITMAPV5HEADER */
}
lines = abs(bmp->bitmap.bmHeight);
goto done;
case 1:
case 4:
case 8:
{
unsigned int colors = 1 << bpp;
if (!core_header) info->bmiHeader.biClrUsed = 0;
if (coloruse == DIB_PAL_COLORS)
{
WORD *index = colorPtr;
for (i = 0; i < colors; i++, index++)
*index = i;
break;
}
/* If the bitmap object already has a dib section at the
same color depth then get the color map from it */
if (bmp->dib && bmp->dib->dsBm.bmBitsPixel == bpp)
{
colors = min( colors, bmp->nb_colors );
if (!core_header && colors != 1 << bpp) info->bmiHeader.biClrUsed = colors;
memcpy(rgbQuads, bmp->color_table, colors * sizeof(RGBQUAD));
}
/* For color DDBs in native depth (mono DDBs always have a black/white palette):
Generate the color map from the selected palette */
else if (bpp > 1 && bpp == bmp->bitmap.bmBitsPixel)
{
PALETTEENTRY palEntry[256];
memset( palEntry, 0, sizeof(palEntry) );
if (!GetPaletteEntries( dc->hPalette, 0, colors, palEntry ))
{
release_dc_ptr( dc );
GDI_ReleaseObj( hbitmap );
return 0;
}
for (i = 0; i < colors; i++)
{
rgbQuads[i].rgbRed = palEntry[i].peRed;
rgbQuads[i].rgbGreen = palEntry[i].peGreen;
rgbQuads[i].rgbBlue = palEntry[i].peBlue;
rgbQuads[i].rgbReserved = 0;
}
}
else
{
switch (bpp)
{
case 1:
rgbQuads[0].rgbRed = rgbQuads[0].rgbGreen = rgbQuads[0].rgbBlue = 0;
rgbQuads[0].rgbReserved = 0;
rgbQuads[1].rgbRed = rgbQuads[1].rgbGreen = rgbQuads[1].rgbBlue = 0xff;
rgbQuads[1].rgbReserved = 0;
break;
case 4:
/* The EGA palette is the first and last 8 colours of the default palette
with the innermost pair swapped */
memcpy(rgbQuads, DefLogPaletteQuads, 7 * sizeof(RGBQUAD));
memcpy(rgbQuads + 7, DefLogPaletteQuads + 12, 1 * sizeof(RGBQUAD));
memcpy(rgbQuads + 8, DefLogPaletteQuads + 7, 1 * sizeof(RGBQUAD));
memcpy(rgbQuads + 9, DefLogPaletteQuads + 13, 7 * sizeof(RGBQUAD));
break;
case 8:
memcpy(rgbQuads, DefLogPaletteQuads, 10 * sizeof(RGBQUAD));
memcpy(rgbQuads + 246, DefLogPaletteQuads + 10, 10 * sizeof(RGBQUAD));
for (i = 10; i < 246; i++)
{
rgbQuads[i].rgbRed = (i & 0x07) << 5;
rgbQuads[i].rgbGreen = (i & 0x38) << 2;
rgbQuads[i].rgbBlue = i & 0xc0;
rgbQuads[i].rgbReserved = 0;
}
}
}
if(core_header)
{
RGBTRIPLE *triple = (RGBTRIPLE *)colorPtr;
for (i = 0; i < colors; i++)
{
triple[i].rgbtRed = rgbQuads[i].rgbRed;
triple[i].rgbtGreen = rgbQuads[i].rgbGreen;
triple[i].rgbtBlue = rgbQuads[i].rgbBlue;
}
}
break;
}
case 15:
if (info->bmiHeader.biCompression == BI_BITFIELDS)
{
((PDWORD)info->bmiColors)[0] = 0x7c00;
((PDWORD)info->bmiColors)[1] = 0x03e0;
((PDWORD)info->bmiColors)[2] = 0x001f;
}
break;
case 16:
if (info->bmiHeader.biCompression == BI_BITFIELDS)
{
if (bmp->dib)
{
if (bmp->dib->dsBmih.biCompression == BI_BITFIELDS)
memcpy( info->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD) );
else
{
((PDWORD)info->bmiColors)[0] = 0x7c00;
((PDWORD)info->bmiColors)[1] = 0x03e0;
((PDWORD)info->bmiColors)[2] = 0x001f;
}
}
else
{
((PDWORD)info->bmiColors)[0] = 0xf800;
((PDWORD)info->bmiColors)[1] = 0x07e0;
((PDWORD)info->bmiColors)[2] = 0x001f;
}
}
break;
case 24:
case 32:
if (info->bmiHeader.biCompression == BI_BITFIELDS)
{
if (bmp->dib && bmp->dib->dsBmih.biCompression == BI_BITFIELDS)
memcpy( info->bmiColors, bmp->dib->dsBitfields, 3 * sizeof(DWORD) );
else
{
((PDWORD)info->bmiColors)[0] = 0xff0000;
((PDWORD)info->bmiColors)[1] = 0x00ff00;
((PDWORD)info->bmiColors)[2] = 0x0000ff;
}
}
break;
}
if (bits && lines)
{
/* If the bitmap object already have a dib section that contains image data, get the bits from it */
if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && bpp >= 15)
{
/*FIXME: Only RGB dibs supported for now */
unsigned int srcwidth = bmp->dib->dsBm.bmWidth;
int srcwidthb = bmp->dib->dsBm.bmWidthBytes;
unsigned int dstwidth = width;
int dstwidthb = DIB_GetDIBWidthBytes( width, bpp );
LPBYTE dbits = bits, sbits = (LPBYTE) bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
unsigned int x, y, width, widthb;
/*
* If copying from a top-down source bitmap, move the source
* pointer to the end of the source bitmap and negate the width
* so that we copy the bits upside-down.
*/
if (bmp->dib->dsBmih.biHeight < 0)
{
sbits += (srcwidthb * (int)(abs(bmp->dib->dsBmih.biHeight) - 2 * startscan - 1));
srcwidthb = -srcwidthb;
}
/*Same for the destination.*/
if (height < 0)
{
dbits = (LPBYTE)bits + (dstwidthb * (lines - 1));
dstwidthb = -dstwidthb;
}
switch( bpp ) {
case 15:
case 16: /* 16 bpp dstDIB */
{
LPWORD dstbits = (LPWORD)dbits;
WORD rmask = 0x7c00, gmask= 0x03e0, bmask = 0x001f;
/* FIXME: BI_BITFIELDS not supported yet */
switch(bmp->dib->dsBm.bmBitsPixel) {
case 16: /* 16 bpp srcDIB -> 16 bpp dstDIB */
{
widthb = min(abs(srcwidthb), abs(dstwidthb));
/* FIXME: BI_BITFIELDS not supported yet */
for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
memcpy(dbits, sbits, widthb);
}
break;
case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
{
LPBYTE srcbits = sbits;
width = min(srcwidth, dstwidth);
for( y = 0; y < lines; y++) {
for( x = 0; x < width; x++, srcbits += 3)
*dstbits++ = ((srcbits[0] >> 3) & bmask) |
(((WORD)srcbits[1] << 2) & gmask) |
(((WORD)srcbits[2] << 7) & rmask);
dstbits = (LPWORD)(dbits+=dstwidthb);
srcbits = (sbits += srcwidthb);
}
}
break;
case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
{
LPDWORD srcbits = (LPDWORD)sbits;
DWORD val;
width = min(srcwidth, dstwidth);
for( y = 0; y < lines; y++) {
for( x = 0; x < width; x++ ) {
val = *srcbits++;
*dstbits++ = (WORD)(((val >> 3) & bmask) | ((val >> 6) & gmask) |
((val >> 9) & rmask));
}
dstbits = (LPWORD)(dbits+=dstwidthb);
srcbits = (LPDWORD)(sbits+=srcwidthb);
}
}
break;
default: /* ? bit bmp -> 16 bit DIB */
FIXME("15/16 bit DIB %d bit bitmap\n",
bmp->bitmap.bmBitsPixel);
break;
}
}
break;
case 24: /* 24 bpp dstDIB */
{
LPBYTE dstbits = dbits;
switch(bmp->dib->dsBm.bmBitsPixel) {
case 16: /* 16 bpp srcDIB -> 24 bpp dstDIB */
{
LPWORD srcbits = (LPWORD)sbits;
WORD val;
width = min(srcwidth, dstwidth);
/* FIXME: BI_BITFIELDS not supported yet */
for( y = 0; y < lines; y++) {
for( x = 0; x < width; x++ ) {
val = *srcbits++;
*dstbits++ = (BYTE)(((val << 3) & 0xf8) | ((val >> 2) & 0x07));
*dstbits++ = (BYTE)(((val >> 2) & 0xf8) | ((val >> 7) & 0x07));
*dstbits++ = (BYTE)(((val >> 7) & 0xf8) | ((val >> 12) & 0x07));
}
dstbits = dbits+=dstwidthb;
srcbits = (LPWORD)(sbits+=srcwidthb);
}
}
break;
case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
{
widthb = min(abs(srcwidthb), abs(dstwidthb));
for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
memcpy(dbits, sbits, widthb);
}
break;
case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
{
LPBYTE srcbits = sbits;
width = min(srcwidth, dstwidth);
for( y = 0; y < lines; y++) {
for( x = 0; x < width; x++, srcbits++ ) {
*dstbits++ = *srcbits++;
*dstbits++ = *srcbits++;
*dstbits++ = *srcbits++;
}
dstbits = dbits+=dstwidthb;
srcbits = sbits+=srcwidthb;
}
}
break;
default: /* ? bit bmp -> 24 bit DIB */
FIXME("24 bit DIB %d bit bitmap\n",
bmp->bitmap.bmBitsPixel);
break;
}
}
break;
case 32: /* 32 bpp dstDIB */
{
LPDWORD dstbits = (LPDWORD)dbits;
/* FIXME: BI_BITFIELDS not supported yet */
switch(bmp->dib->dsBm.bmBitsPixel) {
case 16: /* 16 bpp srcDIB -> 32 bpp dstDIB */
{
LPWORD srcbits = (LPWORD)sbits;
DWORD val;
width = min(srcwidth, dstwidth);
/* FIXME: BI_BITFIELDS not supported yet */
for( y = 0; y < lines; y++) {
for( x = 0; x < width; x++ ) {
val = (DWORD)*srcbits++;
*dstbits++ = ((val << 3) & 0xf8) | ((val >> 2) & 0x07) |
((val << 6) & 0xf800) | ((val << 1) & 0x0700) |
((val << 9) & 0xf80000) | ((val << 4) & 0x070000);
}
dstbits=(LPDWORD)(dbits+=dstwidthb);
srcbits=(LPWORD)(sbits+=srcwidthb);
}
}
break;
case 24: /* 24 bpp srcDIB -> 32 bpp dstDIB */
{
LPBYTE srcbits = sbits;
width = min(srcwidth, dstwidth);
for( y = 0; y < lines; y++) {
for( x = 0; x < width; x++, srcbits+=3 )
*dstbits++ = srcbits[0] |
(srcbits[1] << 8) |
(srcbits[2] << 16);
dstbits=(LPDWORD)(dbits+=dstwidthb);
srcbits=(sbits+=srcwidthb);
}
}
break;
case 32: /* 32 bpp srcDIB -> 32 bpp dstDIB */
{
widthb = min(abs(srcwidthb), abs(dstwidthb));
/* FIXME: BI_BITFIELDS not supported yet */
for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb) {
memcpy(dbits, sbits, widthb);
}
}
break;
default: /* ? bit bmp -> 32 bit DIB */
FIXME("32 bit DIB %d bit bitmap\n",
bmp->bitmap.bmBitsPixel);
break;
}
}
break;
default: /* ? bit DIB */
FIXME("Unsupported DIB depth %d\n", info->bmiHeader.biBitCount);
break;
}
}
/* Otherwise, get bits from the XImage */
else
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pGetDIBits );
if (!BITMAP_SetOwnerDC( hbitmap, physdev )) lines = 0;
else lines = physdev->funcs->pGetDIBits( physdev, hbitmap, startscan,
lines, bits, info, coloruse );
}
}
else lines = abs(height);
/* The knowledge base article Q81498 ("DIBs and Their Uses") states that
if bits == NULL and bpp != 0, only biSizeImage and the color table are
filled in. */
if (!core_header)
{
/* FIXME: biSizeImage should be calculated according to the selected
compression algorithm if biCompression != BI_RGB */
info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes( width, height, bpp );
TRACE("biSizeImage = %d, ", info->bmiHeader.biSizeImage);
}
TRACE("biWidth = %d, biHeight = %d\n", width, height);
done:
release_dc_ptr( dc );
GDI_ReleaseObj( hbitmap );
return lines;
}
/***********************************************************************
* CreateDIBitmap (GDI32.@)
*
* Creates a DDB (device dependent bitmap) from a DIB.
* The DDB will have the same color depth as the reference DC.
*/
HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
DWORD init, LPCVOID bits, const BITMAPINFO *data,
UINT coloruse )
{
HBITMAP handle;
LONG width;
LONG height;
WORD planes, bpp;
DWORD compr, size;
if (!header) return 0;
if (DIB_GetBitmapInfo( header, &width, &height, &planes, &bpp, &compr, &size ) == -1) return 0;
if (width < 0)
{
TRACE("Bitmap has a negative width\n");
return 0;
}
/* Top-down DIBs have a negative height */
if (height < 0) height = -height;
TRACE("hdc=%p, header=%p, init=%u, bits=%p, data=%p, coloruse=%u (bitmap: width=%d, height=%d, bpp=%u, compr=%u)\n",
hdc, header, init, bits, data, coloruse, width, height, bpp, compr);
if (hdc == NULL)
handle = CreateBitmap( width, height, 1, 1, NULL );
else
handle = CreateCompatibleBitmap( hdc, width, height );
if (handle)
{
if (init & CBM_INIT)
{
if (SetDIBits( hdc, handle, 0, height, bits, data, coloruse ) == 0)
{
DeleteObject( handle );
handle = 0;
}
}
}
return handle;
}
/* Copy/synthesize RGB palette from BITMAPINFO. Ripped from dlls/winex11.drv/dib.c */
static void DIB_CopyColorTable( DC *dc, BITMAPOBJ *bmp, WORD coloruse, const BITMAPINFO *info )
{
RGBQUAD *colorTable;
unsigned int colors, i;
BOOL core_info = info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER);
if (core_info)
{
colors = 1 << ((const BITMAPCOREINFO*) info)->bmciHeader.bcBitCount;
}
else
{
colors = info->bmiHeader.biClrUsed;
if (!colors) colors = 1 << info->bmiHeader.biBitCount;
}
if (colors > 256) {
ERR("called with >256 colors!\n");
return;
}
if (!(colorTable = HeapAlloc(GetProcessHeap(), 0, colors * sizeof(RGBQUAD) ))) return;
if(coloruse == DIB_RGB_COLORS)
{
if (core_info)
{
/* Convert RGBTRIPLEs to RGBQUADs */
for (i=0; i < colors; i++)
{
colorTable[i].rgbRed = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtRed;
colorTable[i].rgbGreen = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtGreen;
colorTable[i].rgbBlue = ((const BITMAPCOREINFO*) info)->bmciColors[i].rgbtBlue;
colorTable[i].rgbReserved = 0;
}
}
else
{
memcpy(colorTable, (const BYTE*) info + (WORD) info->bmiHeader.biSize, colors * sizeof(RGBQUAD));
}
}
else
{
PALETTEENTRY entries[256];
const WORD *index = (const WORD*) ((const BYTE*) info + (WORD) info->bmiHeader.biSize);
UINT count = GetPaletteEntries( dc->hPalette, 0, colors, entries );
for (i = 0; i < colors; i++, index++)
{
PALETTEENTRY *entry = &entries[*index % count];
colorTable[i].rgbRed = entry->peRed;
colorTable[i].rgbGreen = entry->peGreen;
colorTable[i].rgbBlue = entry->peBlue;
colorTable[i].rgbReserved = 0;
}
}
bmp->color_table = colorTable;
bmp->nb_colors = colors;
}
/***********************************************************************
* CreateDIBSection (GDI32.@)
*/
HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
VOID **bits, HANDLE section, DWORD offset)
{
HBITMAP ret = 0;
DC *dc;
BOOL bDesktopDC = FALSE;
DIBSECTION *dib;
BITMAPOBJ *bmp;
int bitmap_type;
LONG width, height;
WORD planes, bpp;
DWORD compression, sizeImage;
void *mapBits = NULL;
if(!bmi){
if(bits) *bits = NULL;
return NULL;
}
if (((bitmap_type = DIB_GetBitmapInfo( &bmi->bmiHeader, &width, &height,
&planes, &bpp, &compression, &sizeImage )) == -1))
return 0;
switch (bpp)
{
case 16:
case 32:
if (compression == BI_BITFIELDS) break;
/* fall through */
case 1:
case 4:
case 8:
case 24:
if (compression == BI_RGB) break;
/* fall through */
default:
WARN( "invalid %u bpp compression %u\n", bpp, compression );
return 0;
}
if (!(dib = HeapAlloc( GetProcessHeap(), 0, sizeof(*dib) ))) return 0;
TRACE("format (%d,%d), planes %d, bpp %d, %s, size %d %s\n",
width, height, planes, bpp, compression == BI_BITFIELDS? "BI_BITFIELDS" : "BI_RGB",
sizeImage, usage == DIB_PAL_COLORS? "PAL" : "RGB");
dib->dsBm.bmType = 0;
dib->dsBm.bmWidth = width;
dib->dsBm.bmHeight = height >= 0 ? height : -height;
dib->dsBm.bmWidthBytes = DIB_GetDIBWidthBytes(width, bpp);
dib->dsBm.bmPlanes = planes;
dib->dsBm.bmBitsPixel = bpp;
dib->dsBm.bmBits = NULL;
if (!bitmap_type) /* core header */
{
/* convert the BITMAPCOREHEADER to a BITMAPINFOHEADER */
dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER);
dib->dsBmih.biWidth = width;
dib->dsBmih.biHeight = height;
dib->dsBmih.biPlanes = planes;
dib->dsBmih.biBitCount = bpp;
dib->dsBmih.biCompression = compression;
dib->dsBmih.biXPelsPerMeter = 0;
dib->dsBmih.biYPelsPerMeter = 0;
dib->dsBmih.biClrUsed = 0;
dib->dsBmih.biClrImportant = 0;
}
else
{
/* truncate extended bitmap headers (BITMAPV4HEADER etc.) */
dib->dsBmih = bmi->bmiHeader;
dib->dsBmih.biSize = sizeof(BITMAPINFOHEADER);
}
/* set number of entries in bmi.bmiColors table */
if( bpp <= 8 )
dib->dsBmih.biClrUsed = 1 << bpp;
dib->dsBmih.biSizeImage = dib->dsBm.bmWidthBytes * dib->dsBm.bmHeight;
/* set dsBitfields values */
dib->dsBitfields[0] = dib->dsBitfields[1] = dib->dsBitfields[2] = 0;
if((bpp == 15 || bpp == 16) && compression == BI_RGB)
{
/* In this case Windows changes biCompression to BI_BITFIELDS,
however for now we won't do this, as there are a lot
of places where BI_BITFIELDS is currently unsupported. */
/* dib->dsBmih.biCompression = compression = BI_BITFIELDS;*/
dib->dsBitfields[0] = 0x7c00;
dib->dsBitfields[1] = 0x03e0;
dib->dsBitfields[2] = 0x001f;
}
else if(compression == BI_BITFIELDS)
{
dib->dsBitfields[0] = *(const DWORD *)bmi->bmiColors;
dib->dsBitfields[1] = *((const DWORD *)bmi->bmiColors + 1);
dib->dsBitfields[2] = *((const DWORD *)bmi->bmiColors + 2);
}
/* get storage location for DIB bits */
if (section)
{
SYSTEM_INFO SystemInfo;
DWORD mapOffset;
INT mapSize;
GetSystemInfo( &SystemInfo );
mapOffset = offset - (offset % SystemInfo.dwAllocationGranularity);
mapSize = dib->dsBmih.biSizeImage + (offset - mapOffset);
mapBits = MapViewOfFile( section, FILE_MAP_ALL_ACCESS, 0, mapOffset, mapSize );
if (mapBits) dib->dsBm.bmBits = (char *)mapBits + (offset - mapOffset);
}
else
{
offset = 0;
dib->dsBm.bmBits = VirtualAlloc( NULL, dib->dsBmih.biSizeImage,
MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE );
}
dib->dshSection = section;
dib->dsOffset = offset;
if (!dib->dsBm.bmBits)
{
HeapFree( GetProcessHeap(), 0, dib );
return 0;
}
/* If the reference hdc is null, take the desktop dc */
if (hdc == 0)
{
hdc = CreateCompatibleDC(0);
bDesktopDC = TRUE;
}
if (!(dc = get_dc_ptr( hdc ))) goto error;
/* create Device Dependent Bitmap and add DIB pointer */
ret = CreateBitmap( dib->dsBm.bmWidth, dib->dsBm.bmHeight, 1,
(bpp == 1) ? 1 : GetDeviceCaps(hdc, BITSPIXEL), NULL );
if (ret && ((bmp = GDI_GetObjPtr(ret, OBJ_BITMAP))))
{
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pCreateDIBSection );
bmp->dib = dib;
bmp->funcs = physdev->funcs;
/* create local copy of DIB palette */
if (bpp <= 8) DIB_CopyColorTable( dc, bmp, usage, bmi );
GDI_ReleaseObj( ret );
if (!physdev->funcs->pCreateDIBSection( physdev, ret, bmi, usage ))
{
DeleteObject( ret );
ret = 0;
}
}
release_dc_ptr( dc );
if (bDesktopDC) DeleteDC( hdc );
if (ret && bits) *bits = dib->dsBm.bmBits;
return ret;
error:
if (bDesktopDC) DeleteDC( hdc );
if (section) UnmapViewOfFile( mapBits );
else if (!offset) VirtualFree( dib->dsBm.bmBits, 0, MEM_RELEASE );
HeapFree( GetProcessHeap(), 0, dib );
return 0;
}
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