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wine/objects/dib.c
Francois Boisvert 3d696d93de CreateDIBitmap creates a monochrome bitmap only when the first color of the 
colormap is black followed by white. Otherwise it creates a color bitmap.
1999-09-23 11:40:38 +00:00

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/*
* GDI device-independent bitmaps
*
* Copyright 1993,1994 Alexandre Julliard
*
*/
#include "winbase.h"
#include "bitmap.h"
#include "callback.h"
#include "dc.h"
#include "debugtools.h"
#include "monitor.h"
#include "palette.h"
DEFAULT_DEBUG_CHANNEL(bitmap)
/***********************************************************************
* DIB_GetDIBWidthBytes
*
* Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
* http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/struc/src/str01.htm
*/
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 );
}
/***********************************************************************
* DIB_BitmapInfoSize
*
* Return the size of the bitmap info structure including color table.
*/
int DIB_BitmapInfoSize( const BITMAPINFO * info, WORD coloruse )
{
int colors;
if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *core = (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 && (info->bmiHeader.biBitCount <= 8))
colors = 1 << info->bmiHeader.biBitCount;
return sizeof(BITMAPINFOHEADER) + colors *
((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
}
}
/***********************************************************************
* DIB_GetBitmapInfo
*
* Get the info from a bitmap header.
* Return 1 for INFOHEADER, 0 for COREHEADER, -1 for error.
*/
int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, DWORD *width,
int *height, WORD *bpp, WORD *compr )
{
if (header->biSize == sizeof(BITMAPINFOHEADER))
{
*width = header->biWidth;
*height = header->biHeight;
*bpp = header->biBitCount;
*compr = header->biCompression;
return 1;
}
if (header->biSize == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)header;
*width = core->bcWidth;
*height = core->bcHeight;
*bpp = core->bcBitCount;
*compr = 0;
return 0;
}
WARN("(%ld): wrong size for header\n", header->biSize );
return -1;
}
/***********************************************************************
* StretchDIBits16 (GDI.439)
*/
INT16 WINAPI StretchDIBits16(HDC16 hdc, INT16 xDst, INT16 yDst, INT16 widthDst,
INT16 heightDst, INT16 xSrc, INT16 ySrc, INT16 widthSrc,
INT16 heightSrc, const VOID *bits,
const BITMAPINFO *info, UINT16 wUsage, DWORD dwRop )
{
return (INT16)StretchDIBits( hdc, xDst, yDst, widthDst, heightDst,
xSrc, ySrc, widthSrc, heightSrc, bits,
info, wUsage, dwRop );
}
/***********************************************************************
* StretchDIBits32 (GDI32.351)
*/
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 wUsage, DWORD dwRop )
{
DC *dc = DC_GetDCPtr( hdc );
if(!dc) return FALSE;
if(dc->funcs->pStretchDIBits)
return dc->funcs->pStretchDIBits(dc, xDst, yDst, widthDst,
heightDst, xSrc, ySrc, widthSrc,
heightSrc, bits, info, wUsage,
dwRop);
else { /* use StretchBlt32 */
HBITMAP hBitmap, hOldBitmap;
HDC hdcMem;
hBitmap = CreateDIBitmap( hdc, &info->bmiHeader, CBM_INIT,
bits, info, wUsage );
hdcMem = CreateCompatibleDC( hdc );
hOldBitmap = SelectObject( hdcMem, hBitmap );
/* Origin for DIBitmap is bottom left ! */
StretchBlt( hdc, xDst, yDst, widthDst, heightDst,
hdcMem, xSrc, info->bmiHeader.biHeight - heightSrc - ySrc,
widthSrc, heightSrc, dwRop );
SelectObject( hdcMem, hOldBitmap );
DeleteDC( hdcMem );
DeleteObject( hBitmap );
return heightSrc;
}
}
/***********************************************************************
* SetDIBits16 (GDI.440)
*/
INT16 WINAPI SetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
UINT16 coloruse )
{
return SetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
}
/******************************************************************************
* SetDIBits32 [GDI32.312] 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;
BITMAPOBJ *bitmap;
INT result;
/* Check parameters */
dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return 0;
}
if (!(bitmap = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
{
GDI_HEAP_UNLOCK( hdc );
return 0;
}
result = BITMAP_Driver->pSetDIBits(bitmap, dc, startscan,
lines, bits, info,
coloruse, hbitmap);
GDI_HEAP_UNLOCK( hdc );
GDI_HEAP_UNLOCK( hbitmap );
return result;
}
/***********************************************************************
* SetDIBitsToDevice16 (GDI.443)
*/
INT16 WINAPI SetDIBitsToDevice16(HDC16 hdc, INT16 xDest, INT16 yDest, INT16 cx,
INT16 cy, INT16 xSrc, INT16 ySrc, UINT16 startscan,
UINT16 lines, LPCVOID bits, const BITMAPINFO *info,
UINT16 coloruse )
{
return SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, xSrc, ySrc,
startscan, lines, bits, info, coloruse );
}
/***********************************************************************
* SetDIBitsToDevice32 (GDI32.313)
*/
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;
DC *dc;
if (!(dc = DC_GetDCPtr( hdc ))) return 0;
if(dc->funcs->pSetDIBitsToDevice)
ret = dc->funcs->pSetDIBitsToDevice( dc, xDest, yDest, cx, cy, xSrc,
ySrc, startscan, lines, bits,
info, coloruse );
else {
FIXME("unimplemented on hdc %08x\n", hdc);
ret = 0;
}
GDI_HEAP_UNLOCK( hdc );
return ret;
}
/***********************************************************************
* SetDIBColorTable16 (GDI.602)
*/
UINT16 WINAPI SetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
RGBQUAD *colors )
{
return SetDIBColorTable( hdc, startpos, entries, colors );
}
/***********************************************************************
* SetDIBColorTable32 (GDI32.311)
*/
UINT WINAPI SetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
RGBQUAD *colors )
{
DC * dc;
PALETTEENTRY * palEntry;
PALETTEOBJ * palette;
RGBQUAD *end;
dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return 0;
}
if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
{
return 0;
}
/* Transfer color info */
if (dc->w.bitsPerPixel <= 8) {
palEntry = palette->logpalette.palPalEntry + startpos;
if (startpos + entries > (1 << dc->w.bitsPerPixel))
entries = (1 << dc->w.bitsPerPixel) - startpos;
if (startpos + entries > palette->logpalette.palNumEntries)
entries = palette->logpalette.palNumEntries - startpos;
for (end = colors + entries; colors < end; palEntry++, colors++)
{
palEntry->peRed = colors->rgbRed;
palEntry->peGreen = colors->rgbGreen;
palEntry->peBlue = colors->rgbBlue;
}
} else {
entries = 0;
}
GDI_HEAP_UNLOCK( dc->w.hPalette );
return entries;
}
/***********************************************************************
* GetDIBColorTable16 (GDI.603)
*/
UINT16 WINAPI GetDIBColorTable16( HDC16 hdc, UINT16 startpos, UINT16 entries,
RGBQUAD *colors )
{
return GetDIBColorTable( hdc, startpos, entries, colors );
}
/***********************************************************************
* GetDIBColorTable32 (GDI32.169)
*/
UINT WINAPI GetDIBColorTable( HDC hdc, UINT startpos, UINT entries,
RGBQUAD *colors )
{
DC * dc;
PALETTEENTRY * palEntry;
PALETTEOBJ * palette;
RGBQUAD *end;
dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return 0;
}
if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
{
return 0;
}
/* Transfer color info */
if (dc->w.bitsPerPixel <= 8) {
palEntry = palette->logpalette.palPalEntry + startpos;
if (startpos + entries > (1 << dc->w.bitsPerPixel)) {
entries = (1 << dc->w.bitsPerPixel) - startpos;
}
for (end = colors + entries; colors < end; palEntry++, colors++)
{
colors->rgbRed = palEntry->peRed;
colors->rgbGreen = palEntry->peGreen;
colors->rgbBlue = palEntry->peBlue;
colors->rgbReserved = 0;
}
} else {
entries = 0;
}
GDI_HEAP_UNLOCK( dc->w.hPalette );
return entries;
}
/* FIXME the following two structs should be combined with __sysPalTemplate in
objects/color.c - this should happen after de-X11-ing both of these
files.
NB. RGBQUAD and PALETTENTRY have different orderings of red, green
and blue - sigh */
static RGBQUAD EGAColors[16] = {
/* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
{ 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 },
{ 0x80, 0x80, 0x80, 0x00 },
{ 0xc0, 0xc0, 0xc0, 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 }
};
static RGBQUAD DefLogPalette[20] = { /* Copy of Default Logical Palette */
/* rgbBlue, rgbGreen, rgbRed, rgbReserverd */
{ 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, 0xf0, 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 }
};
/***********************************************************************
* GetDIBits16 (GDI.441)
*/
INT16 WINAPI GetDIBits16( HDC16 hdc, HBITMAP16 hbitmap, UINT16 startscan,
UINT16 lines, LPVOID bits, BITMAPINFO * info,
UINT16 coloruse )
{
return GetDIBits( hdc, hbitmap, startscan, lines, bits, info, coloruse );
}
/******************************************************************************
* GetDIBits32 [GDI32.170] Retrieves bits of bitmap and copies to buffer
*
* RETURNS
* Success: Number of scan lines copied from bitmap
* Failure: 0
*
* http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/func/src/f30_14.htm
*/
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;
PALETTEENTRY * palEntry;
PALETTEOBJ * palette;
int i;
if (!info) return 0;
dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return 0;
}
if (!(bmp = (BITMAPOBJ *)GDI_GetObjPtr( hbitmap, BITMAP_MAGIC )))
{
GDI_HEAP_UNLOCK( hdc );
return 0;
}
if (!(palette = (PALETTEOBJ*)GDI_GetObjPtr( dc->w.hPalette, PALETTE_MAGIC )))
{
GDI_HEAP_UNLOCK( hdc );
GDI_HEAP_UNLOCK( hbitmap );
return 0;
}
/* Transfer color info */
if (info->bmiHeader.biBitCount <= 8 && info->bmiHeader.biBitCount > 0 ) {
info->bmiHeader.biClrUsed = 0;
if(info->bmiHeader.biBitCount >= bmp->bitmap.bmBitsPixel) {
palEntry = palette->logpalette.palPalEntry;
for (i = 0; i < (1 << bmp->bitmap.bmBitsPixel); i++, palEntry++) {
if (coloruse == DIB_RGB_COLORS) {
info->bmiColors[i].rgbRed = palEntry->peRed;
info->bmiColors[i].rgbGreen = palEntry->peGreen;
info->bmiColors[i].rgbBlue = palEntry->peBlue;
info->bmiColors[i].rgbReserved = 0;
}
else ((WORD *)info->bmiColors)[i] = (WORD)i;
}
} else {
switch (info->bmiHeader.biBitCount) {
case 1:
info->bmiColors[0].rgbRed = info->bmiColors[0].rgbGreen =
info->bmiColors[0].rgbBlue = 0;
info->bmiColors[0].rgbReserved = 0;
info->bmiColors[1].rgbRed = info->bmiColors[1].rgbGreen =
info->bmiColors[1].rgbBlue = 0xff;
info->bmiColors[1].rgbReserved = 0;
break;
case 4:
memcpy(info->bmiColors, EGAColors, sizeof(EGAColors));
break;
case 8:
{
INT r, g, b;
RGBQUAD *color;
memcpy(info->bmiColors, DefLogPalette,
10 * sizeof(RGBQUAD));
memcpy(info->bmiColors + 246, DefLogPalette + 10,
10 * sizeof(RGBQUAD));
color = info->bmiColors + 10;
for(r = 0; r <= 5; r++) /* FIXME */
for(g = 0; g <= 5; g++)
for(b = 0; b <= 5; b++) {
color->rgbRed = (r * 0xff) / 5;
color->rgbGreen = (g * 0xff) / 5;
color->rgbBlue = (b * 0xff) / 5;
color->rgbReserved = 0;
color++;
}
}
}
}
}
GDI_HEAP_UNLOCK( dc->w.hPalette );
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 && info->bmiHeader.biBitCount >= 15)
{
/*FIXME: Only RGB dibs supported for now */
int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;
int dstwidthb = DIB_GetDIBWidthBytes( info->bmiHeader.biWidth, info->bmiHeader.biBitCount );
LPBYTE dbits = bits, sbits = bmp->dib->dsBm.bmBits + (startscan * srcwidthb);
int x, y;
if ((info->bmiHeader.biHeight < 0) ^ (bmp->dib->dsBmih.biHeight < 0))
{
dbits = (LPBYTE)bits + (dstwidthb * (lines-1));
dstwidthb = -dstwidthb;
}
switch( info->bmiHeader.biBitCount ) {
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 */
{
/* FIXME: BI_BITFIELDS not supported yet */
for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
memcpy(dbits, sbits, srcwidthb);
}
break;
case 24: /* 24 bpp srcDIB -> 16 bpp dstDIB */
{
LPBYTE srcbits = sbits;
for( y = 0; y < lines; y++) {
for( x = 0; x < srcwidth; x++ )
*dstbits++ = ((*srcbits++ >> 3) & bmask) |
(((WORD)*srcbits++ << 2) & gmask) |
(((WORD)*srcbits++ << 7) & rmask);
dstbits = (LPWORD)(dbits+=dstwidthb);
srcbits = (sbits += srcwidthb);
}
}
break;
case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
{
LPDWORD srcbits = (LPDWORD)sbits;
DWORD val;
for( y = 0; y < lines; y++) {
for( x = 0; x < srcwidth; 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;
/* FIXME: BI_BITFIELDS not supported yet */
for( y = 0; y < lines; y++) {
for( x = 0; x < srcwidth; 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 = (LPBYTE)(dbits+=dstwidthb);
srcbits = (LPWORD)(sbits+=srcwidthb);
}
}
break;
case 24: /* 24 bpp srcDIB -> 24 bpp dstDIB */
{
for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
memcpy(dbits, sbits, srcwidthb);
}
break;
case 32: /* 32 bpp srcDIB -> 24 bpp dstDIB */
{
LPBYTE srcbits = (LPBYTE)sbits;
for( y = 0; y < lines; y++) {
for( x = 0; x < srcwidth; x++, srcbits++ ) {
*dstbits++ = *srcbits++;
*dstbits++ = *srcbits++;
*dstbits++ = *srcbits++;
}
dstbits=(LPBYTE)(dbits+=dstwidthb);
srcbits = (LPBYTE)(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;
/* FIXME: BI_BITFIELDS not supported yet */
for( y = 0; y < lines; y++) {
for( x = 0; x < srcwidth; 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;
for( y = 0; y < lines; y++) {
for( x = 0; x < srcwidth; x++, srcbits+=3 )
*dstbits++ = ((DWORD)*srcbits) & 0x00ffffff;
dstbits=(LPDWORD)(dbits+=dstwidthb);
srcbits=(sbits+=srcwidthb);
}
}
break;
case 32: /* 32 bpp srcDIB -> 16 bpp dstDIB */
{
/* FIXME: BI_BITFIELDS not supported yet */
for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)
memcpy(dbits, sbits, srcwidthb);
}
break;
default: /* ? bit bmp -> 16 bit DIB */
FIXME("15/16 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 if(!BITMAP_Driver->pGetDIBits(bmp, dc, startscan, lines, bits, info, coloruse, hbitmap))
{
GDI_HEAP_UNLOCK( hdc );
GDI_HEAP_UNLOCK( hbitmap );
return FALSE;
}
}
else if( info->bmiHeader.biSize >= sizeof(BITMAPINFOHEADER) )
{
/* fill in struct members */
if( info->bmiHeader.biBitCount == 0)
{
info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
info->bmiHeader.biHeight = bmp->bitmap.bmHeight;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
info->bmiHeader.biSizeImage =
DIB_GetDIBImageBytes( bmp->bitmap.bmWidth,
bmp->bitmap.bmHeight,
bmp->bitmap.bmBitsPixel );
info->bmiHeader.biCompression = 0;
}
else
{
info->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(
info->bmiHeader.biWidth,
info->bmiHeader.biHeight,
info->bmiHeader.biBitCount );
}
}
TRACE("biSizeImage = %ld, biWidth = %ld, biHeight = %ld\n",
info->bmiHeader.biSizeImage, info->bmiHeader.biWidth,
info->bmiHeader.biHeight);
GDI_HEAP_UNLOCK( hdc );
GDI_HEAP_UNLOCK( hbitmap );
return lines;
}
/***********************************************************************
* CreateDIBitmap16 (GDI.442)
*/
HBITMAP16 WINAPI CreateDIBitmap16( HDC16 hdc, const BITMAPINFOHEADER * header,
DWORD init, LPCVOID bits, const BITMAPINFO * data,
UINT16 coloruse )
{
return CreateDIBitmap( hdc, header, init, bits, data, coloruse );
}
/***********************************************************************
* CreateDIBitmap32 (GDI32.37)
*/
HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
DWORD init, LPCVOID bits, const BITMAPINFO *data,
UINT coloruse )
{
HBITMAP handle;
BOOL fColor;
DWORD width;
int height;
WORD bpp;
WORD compr;
if (DIB_GetBitmapInfo( header, &width, &height, &bpp, &compr ) == -1) return 0;
if (height < 0) height = -height;
/* Check if we should create a monochrome or color bitmap. */
/* We create a monochrome bitmap only if it has exactly 2 */
/* colors, which are black followed by white, nothing else. */
/* In all other cases, we create a color bitmap. */
if (bpp != 1) fColor = TRUE;
else if ((coloruse != DIB_RGB_COLORS) ||
(init != CBM_INIT) || !data) fColor = FALSE;
else
{
if (data->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
{
RGBQUAD *rgb = data->bmiColors;
DWORD col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
/* Check if the first color of the colormap is black */
if ((col == RGB(0,0,0)))
{
rgb++;
col = RGB( rgb->rgbRed, rgb->rgbGreen, rgb->rgbBlue );
/* If the second color is white, create a monochrome bitmap */
fColor = (col != RGB(0xff,0xff,0xff));
}
/* Note : If the first color of the colormap is white
followed by black, we have to create a color bitmap.
If we don't the white will be displayed in black later on!*/
else fColor = TRUE;
}
else if (data->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
RGBTRIPLE *rgb = ((BITMAPCOREINFO *)data)->bmciColors;
DWORD col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
if ((col == RGB(0,0,0)))
{
rgb++;
col = RGB( rgb->rgbtRed, rgb->rgbtGreen, rgb->rgbtBlue );
fColor = (col != RGB(0xff,0xff,0xff));
}
else fColor = TRUE;
}
else
{
WARN("(%ld): wrong size for data\n",
data->bmiHeader.biSize );
return 0;
}
}
/* Now create the bitmap */
handle = fColor ? CreateBitmap( width, height, 1, MONITOR_GetDepth(&MONITOR_PrimaryMonitor), NULL ) :
CreateBitmap( width, height, 1, 1, NULL );
if (!handle) return 0;
if (init == CBM_INIT)
SetDIBits( hdc, handle, 0, height, bits, data, coloruse );
return handle;
}
/***********************************************************************
* CreateDIBSection16 (GDI.489)
*/
HBITMAP16 WINAPI CreateDIBSection16 (HDC16 hdc, BITMAPINFO *bmi, UINT16 usage,
SEGPTR *bits, HANDLE section,
DWORD offset)
{
HBITMAP16 hbitmap;
DC *dc = (DC *) GDI_GetObjPtr(hdc, DC_MAGIC);
if(!dc) dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if(!dc) return (HBITMAP16) NULL;
hbitmap = dc->funcs->pCreateDIBSection16(dc, bmi, usage, bits, section, offset);
GDI_HEAP_UNLOCK(hdc);
return hbitmap;
}
/***********************************************************************
* CreateDIBSection32 (GDI32.36)
*/
HBITMAP WINAPI CreateDIBSection(HDC hdc, BITMAPINFO *bmi, UINT usage,
LPVOID *bits, HANDLE section,
DWORD offset)
{
HBITMAP hbitmap;
DC *dc = (DC *) GDI_GetObjPtr(hdc, DC_MAGIC);
if(!dc) dc = (DC *) GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if(!dc) return (HBITMAP) NULL;
hbitmap = dc->funcs->pCreateDIBSection(dc, bmi, usage, bits, section, offset);
GDI_HEAP_UNLOCK(hdc);
return hbitmap;
}
/***********************************************************************
* DIB_DeleteDIBSection
*/
void DIB_DeleteDIBSection( BITMAPOBJ *bmp )
{
if (bmp && bmp->dib)
{
DIBSECTION *dib = bmp->dib;
if (dib->dsBm.bmBits)
{
if (dib->dshSection)
UnmapViewOfFile(dib->dsBm.bmBits);
else
VirtualFree(dib->dsBm.bmBits, MEM_RELEASE, 0L);
}
BITMAP_Driver->pDeleteDIBSection(bmp);
HeapFree(GetProcessHeap(), 0, dib);
bmp->dib = NULL;
}
}
/***********************************************************************
* DIB_FixColorsToLoadflags
*
* Change color table entries when LR_LOADTRANSPARENT or LR_LOADMAP3DCOLORS
* are in loadflags
*/
void DIB_FixColorsToLoadflags(BITMAPINFO * bmi, UINT loadflags, BYTE pix)
{
int colors;
COLORREF c_W, c_S, c_F, c_L, c_C;
int incr,i;
RGBQUAD *ptr;
if (bmi->bmiHeader.biBitCount > 8) return;
if (bmi->bmiHeader.biSize == sizeof(BITMAPINFOHEADER)) incr = 4;
else if (bmi->bmiHeader.biSize == sizeof(BITMAPCOREHEADER)) incr = 3;
else {
WARN("Wrong bitmap header size!\n");
return;
}
colors = bmi->bmiHeader.biClrUsed;
if (!colors && (bmi->bmiHeader.biBitCount <= 8))
colors = 1 << bmi->bmiHeader.biBitCount;
c_W = GetSysColor(COLOR_WINDOW);
c_S = GetSysColor(COLOR_3DSHADOW);
c_F = GetSysColor(COLOR_3DFACE);
c_L = GetSysColor(COLOR_3DLIGHT);
if (loadflags & LR_LOADTRANSPARENT) {
switch (bmi->bmiHeader.biBitCount) {
case 1: pix = pix >> 7; break;
case 4: pix = pix >> 4; break;
case 8: break;
default:
WARN("(%d): Unsupported depth\n", bmi->bmiHeader.biBitCount);
return;
}
if (pix >= colors) {
WARN("pixel has color index greater than biClrUsed!\n");
return;
}
if (loadflags & LR_LOADMAP3DCOLORS) c_W = c_F;
ptr = (RGBQUAD*)((char*)bmi->bmiColors+pix*incr);
ptr->rgbBlue = GetBValue(c_W);
ptr->rgbGreen = GetGValue(c_W);
ptr->rgbRed = GetRValue(c_W);
}
if (loadflags & LR_LOADMAP3DCOLORS)
for (i=0; i<colors; i++) {
ptr = (RGBQUAD*)((char*)bmi->bmiColors+i*incr);
c_C = RGB(ptr->rgbRed, ptr->rgbGreen, ptr->rgbBlue);
if (c_C == RGB(128, 128, 128)) {
ptr->rgbRed = GetRValue(c_S);
ptr->rgbGreen = GetGValue(c_S);
ptr->rgbBlue = GetBValue(c_S);
} else if (c_C == RGB(192, 192, 192)) {
ptr->rgbRed = GetRValue(c_F);
ptr->rgbGreen = GetGValue(c_F);
ptr->rgbBlue = GetBValue(c_F);
} else if (c_C == RGB(223, 223, 223)) {
ptr->rgbRed = GetRValue(c_L);
ptr->rgbGreen = GetGValue(c_L);
ptr->rgbBlue = GetBValue(c_L);
}
}
}
/***********************************************************************
* DIB_CreateDIBFromBitmap
* Allocates a packed DIB and copies the bitmap data into it.
*/
HGLOBAL DIB_CreateDIBFromBitmap(HDC hdc, HBITMAP hBmp)
{
BITMAPOBJ *pBmp = NULL;
HGLOBAL hPackedDIB = 0;
LPBYTE pPackedDIB = NULL;
LPBITMAPINFOHEADER pbmiHeader = NULL;
unsigned int width, height, depth, cDataSize = 0, cPackedSize = 0,
OffsetBits = 0, nLinesCopied = 0;
/* Get a pointer to the BITMAPOBJ structure */
pBmp = (BITMAPOBJ *)GDI_GetObjPtr( hBmp, BITMAP_MAGIC );
/* Get the bitmap dimensions */
width = pBmp->bitmap.bmWidth;
height = pBmp->bitmap.bmHeight;
depth = pBmp->bitmap.bmBitsPixel;
/*
* A packed DIB contains a BITMAPINFO structure followed immediately by
* an optional color palette and the pixel data.
*/
/* Calculate the size of the packed DIB */
cDataSize = DIB_GetDIBImageBytes( width, height, depth );
cPackedSize = sizeof(BITMAPINFOHEADER)
+ ( (depth <= 8) ? (sizeof(RGBQUAD) * (1 << depth)) : 0 )
+ cDataSize;
/* Get the offset to the bits */
OffsetBits = cPackedSize - cDataSize;
/* Allocate the packed DIB */
TRACE("\tAllocating packed DIB of size %d\n", cPackedSize);
hPackedDIB = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE /*| GMEM_ZEROINIT*/,
cPackedSize );
if ( !hPackedDIB )
{
WARN("Could not allocate packed DIB!\n");
goto END;
}
/* A packed DIB starts with a BITMAPINFOHEADER */
pPackedDIB = (LPBYTE)GlobalLock(hPackedDIB);
pbmiHeader = (LPBITMAPINFOHEADER)pPackedDIB;
/* Init the BITMAPINFOHEADER */
pbmiHeader->biSize = sizeof(BITMAPINFOHEADER);
pbmiHeader->biWidth = width;
pbmiHeader->biHeight = height;
pbmiHeader->biPlanes = 1;
pbmiHeader->biBitCount = depth;
pbmiHeader->biCompression = BI_RGB;
pbmiHeader->biSizeImage = 0;
pbmiHeader->biXPelsPerMeter = pbmiHeader->biYPelsPerMeter = 0;
pbmiHeader->biClrUsed = 0;
pbmiHeader->biClrImportant = 0;
/* Retrieve the DIB bits from the bitmap and fill in the
* DIB color table if present */
nLinesCopied = GetDIBits(hdc, /* Handle to device context */
hBmp, /* Handle to bitmap */
0, /* First scan line to set in dest bitmap */
height, /* Number of scan lines to copy */
pPackedDIB + OffsetBits, /* [out] Address of array for bitmap bits */
(LPBITMAPINFO) pbmiHeader, /* [out] Address of BITMAPINFO structure */
0); /* RGB or palette index */
GlobalUnlock(hPackedDIB);
/* Cleanup if GetDIBits failed */
if (nLinesCopied != height)
{
TRACE("\tGetDIBits returned %d. Actual lines=%d\n", nLinesCopied, height);
GlobalFree(hPackedDIB);
hPackedDIB = 0;
}
END:
return hPackedDIB;
}
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