// Initializes this Image object. This is identical to calling the image's
// constructor with picture, but this allows non-constructor initialization,
// which may be necessary in some instances.
private unsafe void Initialize(int width, int height)
{
if (_iconData == null || _handle != IntPtr.Zero)
{
throw new InvalidOperationException(SR.Format(SR.IllegalState, GetType().Name));
}
if (_iconData.Length < sizeof(SafeNativeMethods.ICONDIR))
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", nameof(Icon)));
}
// Get the correct width and height.
if (width == 0)
{
width = UnsafeNativeMethods.GetSystemMetrics(SafeNativeMethods.SM_CXICON);
}
if (height == 0)
{
height = UnsafeNativeMethods.GetSystemMetrics(SafeNativeMethods.SM_CYICON);
}
if (s_bitDepth == 0)
{
IntPtr dc = Interop.User32.GetDC(IntPtr.Zero);
s_bitDepth = Interop.Gdi32.GetDeviceCaps(dc, Interop.Gdi32.DeviceCapability.BITSPIXEL);
s_bitDepth *= Interop.Gdi32.GetDeviceCaps(dc, Interop.Gdi32.DeviceCapability.PLANES);
Interop.User32.ReleaseDC(IntPtr.Zero, dc);
// If the bitdepth is 8, make it 4 because windows does not
// choose a 256 color icon if the display is running in 256 color mode
// due to palette flicker.
if (s_bitDepth == 8)
{
s_bitDepth = 4;
}
}
fixed(byte *b = _iconData)
{
SafeNativeMethods.ICONDIR *dir = (SafeNativeMethods.ICONDIR *)b;
if (dir->idReserved != 0 || dir->idType != 1 || dir->idCount == 0)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", nameof(Icon)));
}
byte bestWidth = 0;
byte bestHeight = 0;
if (sizeof(SafeNativeMethods.ICONDIRENTRY) * (dir->idCount - 1) + sizeof(SafeNativeMethods.ICONDIR)
> _iconData.Length)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", nameof(Icon)));
}
var entries = new ReadOnlySpan <SafeNativeMethods.ICONDIRENTRY>(&dir->idEntries, dir->idCount);
foreach (SafeNativeMethods.ICONDIRENTRY entry in entries)
{
bool fUpdateBestFit = false;
uint iconBitDepth;
if (entry.bColorCount != 0)
{
iconBitDepth = 4;
if (entry.bColorCount < 0x10)
{
iconBitDepth = 1;
}
}
else
{
iconBitDepth = entry.wBitCount;
}
// If it looks like if nothing is specified at this point then set the bits per pixel to 8.
if (iconBitDepth == 0)
{
iconBitDepth = 8;
}
// Windows rules for specifing an icon:
//
// 1. The icon with the closest size match.
// 2. For matching sizes, the image with the closest bit depth.
// 3. If there is no color depth match, the icon with the closest color depth that does not exceed the display.
// 4. If all icon color depth > display, lowest color depth is chosen.
// 5. color depth of > 8bpp are all equal.
// 6. Never choose an 8bpp icon on an 8bpp system.
if (_bestBytesInRes == 0)
{
fUpdateBestFit = true;
}
else
{
int bestDelta = Math.Abs(bestWidth - width) + Math.Abs(bestHeight - height);
int thisDelta = Math.Abs(entry.bWidth - width) + Math.Abs(entry.bHeight - height);
if ((thisDelta < bestDelta) ||
(thisDelta == bestDelta && (iconBitDepth <= s_bitDepth && iconBitDepth > _bestBitDepth || _bestBitDepth > s_bitDepth && iconBitDepth < _bestBitDepth)))
{
fUpdateBestFit = true;
}
}
if (fUpdateBestFit)
{
bestWidth = entry.bWidth;
bestHeight = entry.bHeight;
_bestImageOffset = entry.dwImageOffset;
_bestBytesInRes = entry.dwBytesInRes;
_bestBitDepth = iconBitDepth;
}
}
if (_bestImageOffset > int.MaxValue)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", nameof(Icon)));
}
if (_bestBytesInRes > int.MaxValue)
{
throw new Win32Exception(SafeNativeMethods.ERROR_INVALID_PARAMETER);
}
uint endOffset;
try
{
endOffset = checked (_bestImageOffset + _bestBytesInRes);
}
catch (OverflowException)
{
throw new Win32Exception(SafeNativeMethods.ERROR_INVALID_PARAMETER);
}
if (endOffset > _iconData.Length)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", nameof(Icon)));
}
// Copy the bytes into an aligned buffer if needed.
if ((_bestImageOffset % IntPtr.Size) != 0)
{
// Beginning of icon's content is misaligned.
byte[] alignedBuffer = ArrayPool <byte> .Shared.Rent((int)_bestBytesInRes);
Array.Copy(_iconData, _bestImageOffset, alignedBuffer, 0, _bestBytesInRes);
fixed(byte *pbAlignedBuffer = alignedBuffer)
{
_handle = SafeNativeMethods.CreateIconFromResourceEx(pbAlignedBuffer, _bestBytesInRes, true, 0x00030000, 0, 0, 0);
}
ArrayPool <byte> .Shared.Return(alignedBuffer);
}
else
{
try
{
_handle = SafeNativeMethods.CreateIconFromResourceEx(checked (b + _bestImageOffset), _bestBytesInRes, true, 0x00030000, 0, 0, 0);
}
catch (OverflowException)
{
throw new Win32Exception(SafeNativeMethods.ERROR_INVALID_PARAMETER);
}
}
if (_handle == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
private unsafe void Initialize(int width, int height)
{
if ((this.iconData == null) || (this.handle != IntPtr.Zero))
{
throw new InvalidOperationException(System.Drawing.SR.GetString("IllegalState", new object[] { base.GetType().Name }));
}
if (this.iconData.Length < Marshal.SizeOf(typeof(SafeNativeMethods.ICONDIR)))
{
throw new ArgumentException(System.Drawing.SR.GetString("InvalidPictureType", new object[] { "picture", "Icon" }));
}
if (width == 0)
{
width = System.Drawing.UnsafeNativeMethods.GetSystemMetrics(11);
}
if (height == 0)
{
height = System.Drawing.UnsafeNativeMethods.GetSystemMetrics(12);
}
if (bitDepth == 0)
{
IntPtr dC = System.Drawing.UnsafeNativeMethods.GetDC(System.Drawing.NativeMethods.NullHandleRef);
bitDepth = System.Drawing.UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, dC), 12);
bitDepth *= System.Drawing.UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, dC), 14);
System.Drawing.UnsafeNativeMethods.ReleaseDC(System.Drawing.NativeMethods.NullHandleRef, new HandleRef(null, dC));
if (bitDepth == 8)
{
bitDepth = 4;
}
}
fixed(byte *numRef = this.iconData)
{
short @short = this.GetShort(numRef);
short num2 = this.GetShort(numRef + 2);
short num3 = this.GetShort(numRef + 4);
if (((@short != 0) || (num2 != 1)) || (num3 == 0))
{
throw new ArgumentException(System.Drawing.SR.GetString("InvalidPictureType", new object[] { "picture", "Icon" }));
}
byte bWidth = 0;
byte bHeight = 0;
int length = 0;
byte *numPtr = numRef + 6;
int num7 = Marshal.SizeOf(typeof(SafeNativeMethods.ICONDIRENTRY));
if ((num7 * num3) >= this.iconData.Length)
{
throw new ArgumentException(System.Drawing.SR.GetString("InvalidPictureType", new object[] { "picture", "Icon" }));
}
for (int i = 0; i < num3; i++)
{
SafeNativeMethods.ICONDIRENTRY icondirentry;
icondirentry.bWidth = numPtr[0];
icondirentry.bHeight = numPtr[1];
icondirentry.bColorCount = numPtr[2];
icondirentry.bReserved = numPtr[3];
icondirentry.wPlanes = this.GetShort(numPtr + 4);
icondirentry.wBitCount = this.GetShort(numPtr + 6);
icondirentry.dwBytesInRes = this.GetInt(numPtr + 8);
icondirentry.dwImageOffset = this.GetInt(numPtr + 12);
bool flag = false;
int wBitCount = 0;
if (icondirentry.bColorCount != 0)
{
wBitCount = 4;
if (icondirentry.bColorCount < 0x10)
{
wBitCount = 1;
}
}
else
{
wBitCount = icondirentry.wBitCount;
}
if (wBitCount == 0)
{
wBitCount = 8;
}
if (length == 0)
{
flag = true;
}
else
{
int num10 = Math.Abs((int)(bWidth - width)) + Math.Abs((int)(bHeight - height));
int introduced25 = Math.Abs((int)(icondirentry.bWidth - width));
int num11 = introduced25 + Math.Abs((int)(icondirentry.bHeight - height));
if ((num11 < num10) || ((num11 == num10) && (((wBitCount <= bitDepth) && (wBitCount > this.bestBitDepth)) || ((this.bestBitDepth > bitDepth) && (wBitCount < this.bestBitDepth)))))
{
flag = true;
}
}
if (flag)
{
bWidth = icondirentry.bWidth;
bHeight = icondirentry.bHeight;
this.bestImageOffset = icondirentry.dwImageOffset;
length = icondirentry.dwBytesInRes;
this.bestBitDepth = wBitCount;
}
numPtr += num7;
}
if ((this.bestImageOffset < 0) || ((this.bestImageOffset + length) > this.iconData.Length))
{
throw new ArgumentException(System.Drawing.SR.GetString("InvalidPictureType", new object[] { "picture", "Icon" }));
}
if ((this.bestImageOffset % IntPtr.Size) != 0)
{
byte[] destinationArray = new byte[length];
Array.Copy(this.iconData, this.bestImageOffset, destinationArray, 0, length);
fixed(byte *numRef2 = destinationArray)
{
this.handle = SafeNativeMethods.CreateIconFromResourceEx(numRef2, length, true, 0x30000, 0, 0, 0);
}
}
else
{
this.handle = SafeNativeMethods.CreateIconFromResourceEx(numRef + this.bestImageOffset, length, true, 0x30000, 0, 0, 0);
}
if (this.handle == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
/// <include file='doc\Icon.uex' path='docs/doc[@for="Icon.Initialize"]/*' />
/// <devdoc>
/// Initializes this Image object. This is identical to calling the image's
/// constructor with picture, but this allows non-constructor initialization,
/// which may be necessary in some instances.
/// </devdoc>
private unsafe void Initialize(int width, int height)
{
if (_iconData == null || _handle != IntPtr.Zero)
{
throw new InvalidOperationException(SR.Format(SR.IllegalState, GetType().Name));
}
int icondirSize = Marshal.SizeOf(typeof(SafeNativeMethods.ICONDIR));
if (_iconData.Length < icondirSize)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", "Icon"));
}
// Get the correct width / height
//
if (width == 0)
{
width = UnsafeNativeMethods.GetSystemMetrics(SafeNativeMethods.SM_CXICON);
}
if (height == 0)
{
height = UnsafeNativeMethods.GetSystemMetrics(SafeNativeMethods.SM_CYICON);
}
if (s_bitDepth == 0)
{
IntPtr dc = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef);
s_bitDepth = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, dc), SafeNativeMethods.BITSPIXEL);
s_bitDepth *= UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, dc), SafeNativeMethods.PLANES);
UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, dc));
// If the bitdepth is 8, make it 4. Why? Because windows does not
// choose a 256 color icon if the display is running in 256 color mode
// because of palette flicker.
//
if (s_bitDepth == 8)
{
s_bitDepth = 4;
}
}
fixed(byte *pbIconData = _iconData)
{
short idReserved = GetShort(pbIconData);
short idType = GetShort(pbIconData + 2);
short idCount = GetShort(pbIconData + 4);
if (idReserved != 0 || idType != 1 || idCount == 0)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", "Icon"));
}
SafeNativeMethods.ICONDIRENTRY EntryTemp;
byte bestWidth = 0;
byte bestHeight = 0;
//int bestBitDepth = 0;
byte *pbIconDirEntry = unchecked (pbIconData + 6);
int icondirEntrySize = Marshal.SizeOf(typeof(SafeNativeMethods.ICONDIRENTRY));
Debug.Assert((icondirEntrySize * (idCount - 1) + icondirSize) <= _iconData.Length, "Illegal number of ICONDIRENTRIES");
if ((icondirEntrySize * (idCount - 1) + icondirSize) > _iconData.Length)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", "Icon"));
}
for (int i = 0; i < idCount; i++)
{
//
// Fill in EntryTemp
//
EntryTemp.bWidth = pbIconDirEntry[0];
EntryTemp.bHeight = pbIconDirEntry[1];
EntryTemp.bColorCount = pbIconDirEntry[2];
EntryTemp.bReserved = pbIconDirEntry[3];
EntryTemp.wPlanes = GetShort(pbIconDirEntry + 4);
EntryTemp.wBitCount = GetShort(pbIconDirEntry + 6);
EntryTemp.dwBytesInRes = GetInt(pbIconDirEntry + 8);
EntryTemp.dwImageOffset = GetInt(pbIconDirEntry + 12);
//
//
//
bool fUpdateBestFit = false;
int iconBitDepth = 0;
if (EntryTemp.bColorCount != 0)
{
iconBitDepth = 4;
if (EntryTemp.bColorCount < 0x10)
{
iconBitDepth = 1;
}
}
else
{
iconBitDepth = EntryTemp.wBitCount;
}
// it looks like if nothing is specified at this point, bpp is 8...
if (iconBitDepth == 0)
{
iconBitDepth = 8;
}
// Windows rules for specifing an icon:
//
// 1. The icon with the closest size match.
// 2. For matching sizes, the image with the closest bit depth.
// 3. If there is no color depth match, the icon with the closest color depth that does not exceed the display.
// 4. If all icon color depth > display, lowest color depth is chosen.
// 5. color depth of > 8bpp are all equal.
// 6. Never choose an 8bpp icon on an 8bpp system.
//
if (0 == _bestBytesInRes)
{
fUpdateBestFit = true;
}
else
{
int bestDelta = Math.Abs(bestWidth - width) + Math.Abs(bestHeight - height);
int thisDelta = Math.Abs(EntryTemp.bWidth - width) + Math.Abs(EntryTemp.bHeight - height);
if ((thisDelta < bestDelta) ||
(thisDelta == bestDelta && (iconBitDepth <= s_bitDepth && iconBitDepth > _bestBitDepth || _bestBitDepth > s_bitDepth && iconBitDepth < _bestBitDepth)))
{
fUpdateBestFit = true;
}
}
if (fUpdateBestFit)
{
bestWidth = EntryTemp.bWidth;
bestHeight = EntryTemp.bHeight;
_bestImageOffset = EntryTemp.dwImageOffset;
_bestBytesInRes = EntryTemp.dwBytesInRes;
_bestBitDepth = iconBitDepth;
}
pbIconDirEntry += icondirEntrySize;
}
Debug.Assert(_bestImageOffset >= 0 && _bestBytesInRes >= 0 && (_bestImageOffset + _bestBytesInRes) <= _iconData.Length, "Illegal offset/length for the Icon data");
if (_bestImageOffset < 0)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", "Icon"));
}
if (_bestBytesInRes < 0)
{
throw new Win32Exception(SafeNativeMethods.ERROR_INVALID_PARAMETER);
}
int endOffset;
try
{
endOffset = checked (_bestImageOffset + _bestBytesInRes);
}
catch (OverflowException)
{
throw new Win32Exception(SafeNativeMethods.ERROR_INVALID_PARAMETER);
}
if (endOffset > _iconData.Length)
{
throw new ArgumentException(SR.Format(SR.InvalidPictureType, "picture", "Icon"));
}
// See DevDivBugs 17509. Copying bytes into an aligned buffer if needed
if ((_bestImageOffset % IntPtr.Size) != 0)
{
// Beginning of icon's content is misaligned
byte[] alignedBuffer = new byte[_bestBytesInRes];
Array.Copy(_iconData, _bestImageOffset, alignedBuffer, 0, _bestBytesInRes);
fixed(byte *pbAlignedBuffer = alignedBuffer)
{
_handle = SafeNativeMethods.CreateIconFromResourceEx(pbAlignedBuffer, _bestBytesInRes, true, 0x00030000, 0, 0, 0);
}
}
else
{
try
{
_handle = SafeNativeMethods.CreateIconFromResourceEx(checked (pbIconData + _bestImageOffset), _bestBytesInRes, true, 0x00030000, 0, 0, 0);
}
catch (OverflowException)
{
throw new Win32Exception(SafeNativeMethods.ERROR_INVALID_PARAMETER);
}
}
if (_handle == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
/// <include file='doc\Icon.uex' path='docs/doc[@for="Icon.Initialize"]/*' />
/// <devdoc>
/// Initializes this Image object. This is identical to calling the image's
/// constructor with picture, but this allows non-constructor initialization,
/// which may be necessary in some instances.
/// </devdoc>
private unsafe void Initialize(int width, int height)
{
if (iconData == null || handle != IntPtr.Zero)
{
throw new InvalidOperationException(SR.GetString(SR.IllegalState, GetType().Name));
}
if (iconData.Length < Marshal.SizeOf(typeof(SafeNativeMethods.ICONDIR)))
{
throw new ArgumentException(SR.GetString(SR.InvalidPictureType, "picture", "Icon"));
}
// Get the correct width / height
//
if (width == 0)
{
width = UnsafeNativeMethods.GetSystemMetrics(SafeNativeMethods.SM_CXICON);
}
if (height == 0)
{
height = UnsafeNativeMethods.GetSystemMetrics(SafeNativeMethods.SM_CYICON);
}
if (bitDepth == 0)
{
IntPtr dc = UnsafeNativeMethods.GetDC(NativeMethods.NullHandleRef);
bitDepth = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, dc), SafeNativeMethods.BITSPIXEL);
bitDepth *= UnsafeNativeMethods.GetDeviceCaps(new HandleRef(null, dc), SafeNativeMethods.PLANES);
UnsafeNativeMethods.ReleaseDC(NativeMethods.NullHandleRef, new HandleRef(null, dc));
// If the bitdepth is 8, make it 4. Why? Because windows does not
// choose a 256 color icon if the display is running in 256 color mode
// because of palette flicker.
//
if (bitDepth == 8)
{
bitDepth = 4;
}
}
fixed(byte *pbIconData = iconData)
{
SafeNativeMethods.ICONDIR *pIconDir = (SafeNativeMethods.ICONDIR *)pbIconData;
if (pIconDir->idReserved != 0 || pIconDir->idType != 1 || pIconDir->idCount == 0)
{
throw new ArgumentException(SR.GetString(SR.InvalidPictureType, "picture", "Icon"));
}
SafeNativeMethods.ICONDIRENTRY *pIconDirEntry = &pIconDir->idEntries;
SafeNativeMethods.ICONDIRENTRY *pBestFit = null;
int bestBitDepth = 0;
int icondirEntrySize = Marshal.SizeOf(typeof(SafeNativeMethods.ICONDIRENTRY));
Debug.Assert((icondirEntrySize * pIconDir->idCount) < iconData.Length, "Illegal number of ICONDIRENTRIES");
if ((icondirEntrySize * pIconDir->idCount) >= iconData.Length)
{
throw new ArgumentException(SR.GetString(SR.InvalidPictureType, "picture", "Icon"));
}
for (int i = 0; i < pIconDir->idCount; i++)
{
int iconBitDepth = pIconDirEntry->wPlanes * pIconDirEntry->wBitCount;
if (iconBitDepth == 0)
{
if (pIconDirEntry->bColorCount == 0)
{
iconBitDepth = 16;
}
else
{
iconBitDepth = 8;
if (pIconDirEntry->bColorCount < 0xFF)
{
iconBitDepth = 4;
}
if (pIconDirEntry->bColorCount < 0x10)
{
iconBitDepth = 2;
}
}
}
// Windows rules for specifing an icon:
//
// 1. The icon with the closest size match.
// 2. For matching sizes, the image with the closest bit depth.
// 3. If there is no color depth match, the icon with the closest color depth that does not exceed the display.
// 4. If all icon color depth > display, lowest color depth is chosen.
// 5. color depth of > 8bpp are all equal.
// 6. Never choose an 8bpp icon on an 8bpp system.
//
if (pBestFit == null)
{
pBestFit = pIconDirEntry;
bestBitDepth = iconBitDepth;
}
else
{
int bestDelta = Math.Abs(pBestFit->bWidth - width) + Math.Abs(pBestFit->bHeight - height);
int thisDelta = Math.Abs(pIconDirEntry->bWidth - width) + Math.Abs(pIconDirEntry->bHeight - height);
if (thisDelta < bestDelta)
{
pBestFit = pIconDirEntry;
bestBitDepth = iconBitDepth;
}
else if (thisDelta == bestDelta && (iconBitDepth <= bitDepth && iconBitDepth > bestBitDepth || bestBitDepth > bitDepth && iconBitDepth < bestBitDepth))
{
pBestFit = pIconDirEntry;
bestBitDepth = iconBitDepth;
}
}
pIconDirEntry++;
}
Debug.Assert(pBestFit->dwImageOffset >= 0 && (pBestFit->dwImageOffset + pBestFit->dwBytesInRes) <= iconData.Length, "Illegal offset/length for the Icon data");
if (pBestFit->dwImageOffset < 0 || (pBestFit->dwImageOffset + pBestFit->dwBytesInRes) > iconData.Length)
{
throw new ArgumentException(SR.GetString(SR.InvalidPictureType, "picture", "Icon"));
}
handle = SafeNativeMethods.CreateIconFromResourceEx(pbIconData + pBestFit->dwImageOffset, pBestFit->dwBytesInRes, true, 0x00030000, 0, 0, 0);
if (handle == IntPtr.Zero)
{
throw new Win32Exception();
}
}
}
