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gdi32: Always allocate a full-size color table when creating a DIB section.

oldstable
Alexandre Julliard 2011-12-09 16:20:04 +01:00
parent 91d19b4b17
commit 647a4d5844
1 changed files with 49 additions and 35 deletions
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84
dlls/gdi32/dib.c
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@ -172,13 +172,11 @@ static BOOL bitmapinfo_from_user_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *
UINT coloruse, BOOL allow_compression )
{
void *src_colors;
unsigned int colors;
if (!bitmapinfoheader_from_user_bitmapinfo( &dst->bmiHeader, &info->bmiHeader )) return FALSE;
if (!is_valid_dib_format( &dst->bmiHeader, allow_compression )) return FALSE;
src_colors = (char *)info + info->bmiHeader.biSize;
colors = get_dib_num_of_colors( dst );
if (dst->bmiHeader.biCompression == BI_BITFIELDS)
{
@ -186,12 +184,23 @@ static BOOL bitmapinfo_from_user_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *
memcpy( dst->bmiColors, info->bmiColors, 3 * sizeof(DWORD) );
dst->bmiHeader.biClrUsed = 0;
}
else if (colors)
else if (dst->bmiHeader.biBitCount <= 8)
{
unsigned int colors = dst->bmiHeader.biClrUsed;
unsigned int max_colors = 1 << dst->bmiHeader.biBitCount;
if (!colors) colors = max_colors;
else colors = min( colors, max_colors );
if (coloruse == DIB_PAL_COLORS)
{
memcpy( dst->bmiColors, src_colors, colors * sizeof(WORD) );
max_colors = colors;
}
else if (info->bmiHeader.biSize != sizeof(BITMAPCOREHEADER))
{
memcpy( dst->bmiColors, src_colors, colors * sizeof(RGBQUAD) );
}
else
{
unsigned int i;
@ -204,8 +213,11 @@ static BOOL bitmapinfo_from_user_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *
dst->bmiColors[i].rgbReserved = 0;
}
}
dst->bmiHeader.biClrUsed = colors;
memset( dst->bmiColors + colors, 0, (max_colors - colors) * sizeof(RGBQUAD) );
dst->bmiHeader.biClrUsed = max_colors;
}
else dst->bmiHeader.biClrUsed = 0;
return TRUE;
}
@ -236,9 +248,10 @@ static int fill_color_table_from_palette( BITMAPINFO *info, HDC hdc )
int fill_color_table_from_pal_colors( HDC hdc, const BITMAPINFO *info, RGBQUAD *color_table )
{
PALETTEENTRY entries[256];
RGBQUAD table[256];
HPALETTE palette;
const WORD *index = (const WORD *)info->bmiColors;
int i, count, colors = get_dib_num_of_colors( info );
int i, count, colors = info->bmiHeader.biClrUsed;
if (!colors) return 0;
if (!(palette = GetCurrentObject( hdc, OBJ_PAL ))) return 0;
@ -246,12 +259,13 @@ int fill_color_table_from_pal_colors( HDC hdc, const BITMAPINFO *info, RGBQUAD *
for (i = 0; i < colors; i++, index++)
{
PALETTEENTRY *entry = &entries[*index % count];
color_table[i].rgbRed = entry->peRed;
color_table[i].rgbGreen = entry->peGreen;
color_table[i].rgbBlue = entry->peBlue;
color_table[i].rgbReserved = 0;
table[i].rgbRed = entries[*index % count].peRed;
table[i].rgbGreen = entries[*index % count].peGreen;
table[i].rgbBlue = entries[*index % count].peBlue;
table[i].rgbReserved = 0;
}
memcpy( color_table, table, colors * sizeof(RGBQUAD) );
memset( color_table + colors, 0, ((1 << info->bmiHeader.biBitCount) - colors) * sizeof(RGBQUAD) );
return colors;
}
@ -1350,6 +1364,7 @@ INT WINAPI GetDIBits(
*index = i;
}
dst_info->bmiHeader.biClrUsed = 0;
copy_color_info( info, dst_info, coloruse );
done:
@ -1404,23 +1419,6 @@ HBITMAP WINAPI CreateDIBitmap( HDC hdc, const BITMAPINFOHEADER *header,
return handle;
}
/* Copy/synthesize RGB palette from BITMAPINFO */
static void DIB_CopyColorTable( HDC hdc, BITMAPOBJ *bmp, WORD coloruse, const BITMAPINFO *info )
{
unsigned int colors = get_dib_num_of_colors( info );
if (!(bmp->color_table = HeapAlloc(GetProcessHeap(), 0, colors * sizeof(RGBQUAD) ))) return;
bmp->nb_colors = colors;
if (coloruse == DIB_RGB_COLORS)
{
memcpy( bmp->color_table, info->bmiColors, colors * sizeof(RGBQUAD));
}
else
{
fill_color_table_from_pal_colors( hdc, info, bmp->color_table );
}
}
/***********************************************************************
* CreateDIBSection (GDI32.@)
@ -1435,6 +1433,7 @@ HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
BOOL bDesktopDC = FALSE;
DIBSECTION *dib;
BITMAPOBJ *bmp;
RGBQUAD *color_table = NULL;
void *mapBits = NULL;
if (bits) *bits = NULL;
@ -1462,9 +1461,22 @@ HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
dib->dsBm.bmBits = NULL;
dib->dsBmih = info->bmiHeader;
/* set number of entries in bmi.bmiColors table */
if( info->bmiHeader.biBitCount <= 8 )
dib->dsBmih.biClrUsed = 1 << info->bmiHeader.biBitCount;
if (info->bmiHeader.biBitCount <= 8) /* build the color table */
{
unsigned int colors = 1 << info->bmiHeader.biBitCount;
if (!(color_table = HeapAlloc( GetProcessHeap(), 0, colors * sizeof(RGBQUAD) )))
{
HeapFree( GetProcessHeap(), 0, dib );
return 0;
}
if (usage == DIB_RGB_COLORS)
memcpy( color_table, info->bmiColors, colors * sizeof(RGBQUAD) );
else
fill_color_table_from_pal_colors( hdc, info, color_table );
dib->dsBmih.biClrUsed = colors;
}
/* set dsBitfields values */
if (info->bmiHeader.biBitCount == 16 && info->bmiHeader.biCompression == BI_RGB)
@ -1476,9 +1488,9 @@ HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
}
else if (info->bmiHeader.biCompression == 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);
dib->dsBitfields[0] = *(const DWORD *)info->bmiColors;
dib->dsBitfields[1] = *((const DWORD *)info->bmiColors + 1);
dib->dsBitfields[2] = *((const DWORD *)info->bmiColors + 2);
if (!dib->dsBitfields[0] || !dib->dsBitfields[1] || !dib->dsBitfields[2]) goto error;
}
else dib->dsBitfields[0] = dib->dsBitfields[1] = dib->dsBitfields[2] = 0;
@ -1508,6 +1520,7 @@ HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
if (!dib->dsBm.bmBits)
{
HeapFree( GetProcessHeap(), 0, color_table );
HeapFree( GetProcessHeap(), 0, dib );
return 0;
}
@ -1530,8 +1543,8 @@ HBITMAP WINAPI CreateDIBSection(HDC hdc, CONST BITMAPINFO *bmi, UINT usage,
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pCreateDIBSection );
bmp->dib = dib;
bmp->funcs = physdev->funcs;
/* create local copy of DIB palette */
if (info->bmiHeader.biBitCount <= 8) DIB_CopyColorTable( hdc, bmp, usage, info );
bmp->color_table = color_table;
bmp->nb_colors = dib->dsBmih.biClrUsed;
GDI_ReleaseObj( ret );
if (!physdev->funcs->pCreateDIBSection( physdev, ret, info, usage ))
@ -1550,6 +1563,7 @@ error:
if (bDesktopDC) DeleteDC( hdc );
if (section) UnmapViewOfFile( mapBits );
else if (!offset) VirtualFree( dib->dsBm.bmBits, 0, MEM_RELEASE );
HeapFree( GetProcessHeap(), 0, color_table );
HeapFree( GetProcessHeap(), 0, dib );
return 0;
}