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Fix some bugs in DIB mapping code to prevent instant system crashes.

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svn path=/trunk/; revision=16737
This commit is contained in:
Filip Navara 2005-07-26 11:22:48 +00:00
parent 11c02111f0
commit e0cd2dc6bf
1 changed files with 32 additions and 10 deletions
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40
reactos/subsys/win32k/objects/dib.c
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@ -190,7 +190,7 @@ IntSetDIBits(
//if (ColorUse == DIB_PAL_COLORS)
// lpRGB = DIB_MapPaletteColors(hDC, bmi);
//else
// lpRGB = &bmi->bmiColors[0];
// lpRGB = &bmi->bmiColors;
DestSurf = &bitmap->SurfObj;
@ -810,6 +810,7 @@ DIB_CreateDIBSection(
UINT Entries = 0;
BITMAP bm;
SIZEL Size;
RGBQUAD *lpRGB;
DPRINT("format (%ld,%ld), planes %d, bpp %d, size %ld, colors %ld (%s)\n",
bi->biWidth, bi->biHeight, bi->biPlanes, bi->biBitCount,
@ -846,7 +847,9 @@ DIB_CreateDIBSection(
}
if(usage == DIB_PAL_COLORS)
memcpy(bmi->bmiColors, (UINT *)DIB_MapPaletteColors(dc, bmi), sizeof(UINT *));
lpRGB = DIB_MapPaletteColors(dc, bmi);
else
lpRGB = bmi->bmiColors;
// Allocate Memory for DIB and fill structure
if (bm.bmBits)
@ -869,9 +872,9 @@ DIB_CreateDIBSection(
else switch(bi->biBitCount)
{
case 16:
dib->dsBitfields[0] = (bi->biCompression == BI_BITFIELDS) ? *(DWORD *)bmi->bmiColors : 0x7c00;
dib->dsBitfields[1] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)bmi->bmiColors + 1) : 0x03e0;
dib->dsBitfields[2] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)bmi->bmiColors + 2) : 0x001f; break;
dib->dsBitfields[0] = (bi->biCompression == BI_BITFIELDS) ? *(DWORD *)lpRGB : 0x7c00;
dib->dsBitfields[1] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)lpRGB + 1) : 0x03e0;
dib->dsBitfields[2] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)lpRGB + 2) : 0x001f; break;
case 24:
dib->dsBitfields[0] = 0xff0000;
@ -880,9 +883,9 @@ DIB_CreateDIBSection(
break;
case 32:
dib->dsBitfields[0] = (bi->biCompression == BI_BITFIELDS) ? *(DWORD *)bmi->bmiColors : 0xff0000;
dib->dsBitfields[1] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)bmi->bmiColors + 1) : 0x00ff00;
dib->dsBitfields[2] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)bmi->bmiColors + 2) : 0x0000ff;
dib->dsBitfields[0] = (bi->biCompression == BI_BITFIELDS) ? *(DWORD *)lpRGB : 0xff0000;
dib->dsBitfields[1] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)lpRGB + 1) : 0x00ff00;
dib->dsBitfields[2] = (bi->biCompression == BI_BITFIELDS) ? *((DWORD *)lpRGB + 2) : 0x0000ff;
break;
}
dib->dshSection = section;
@ -901,12 +904,20 @@ DIB_CreateDIBSection(
bm.bmBits);
if (! res)
{
if (lpRGB != bmi->bmiColors)
{
ExFreePool(lpRGB);
}
SetLastWin32Error(ERROR_NO_SYSTEM_RESOURCES);
return NULL;
}
bmp = BITMAPOBJ_LockBitmap(res);
if (NULL == bmp)
{
if (lpRGB != bmi->bmiColors)
{
ExFreePool(lpRGB);
}
SetLastWin32Error(ERROR_INVALID_HANDLE);
NtGdiDeleteObject(bmp);
return NULL;
@ -921,7 +932,7 @@ DIB_CreateDIBSection(
if(bi->biBitCount == 8) { Entries = 256; }
if (Entries)
bmp->hDIBPalette = PALETTE_AllocPaletteIndexedRGB(Entries, bmi->bmiColors);
bmp->hDIBPalette = PALETTE_AllocPaletteIndexedRGB(Entries, lpRGB);
else
bmp->hDIBPalette = PALETTE_AllocPalette(PAL_BITFIELDS, 0, NULL,
dib->dsBitfields[0],
@ -946,6 +957,11 @@ DIB_CreateDIBSection(
if (res) { BITMAPOBJ_FreeBitmap(res); res = 0; }
}
if (lpRGB != bmi->bmiColors)
{
ExFreePool(lpRGB);
}
if (bmp)
{
BITMAPOBJ_UnlockBitmap(bmp);
@ -1097,6 +1113,12 @@ DIB_MapPaletteColors(PDC dc, CONST BITMAPINFO* lpbmi)
return NULL;
}
if (palGDI->Mode != PAL_INDEXED)
{
PALETTE_UnlockPalette(palGDI);
return NULL;
}
nNumColors = 1 << lpbmi->bmiHeader.biBitCount;
if (lpbmi->bmiHeader.biClrUsed)
{