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Add some fail-safe checks to XImage and XTheme

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This commit is contained in:
asava 2020-04-18 12:46:52 +03:00
parent 1248bf2c71
commit ea58107509
2 changed files with 10 additions and 8 deletions
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14
rEFIt_UEFI/libeg/XImage.cpp
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@ -450,8 +450,8 @@ void XImage::GetArea(INTN x, INTN y, UINTN W, UINTN H)
if (W == 0) W = Width;
if (H == 0) H = Height;
Width = (x + W > (UINTN)UGAWidth) ? (UGAWidth - x) : W;
Height = (y + H > (UINTN)UGAHeight) ? ((UINTN)UGAHeight - y) : H;
Width = (x + W > (UINTN)UGAWidth) ? (x > UGAWidth ? 0 : UGAWidth - x) : W;
Height = (y + H > (UINTN)UGAHeight) ? (y > UGAHeight ? 0 : UGAHeight - y) : H;
setSizeInPixels(Width, Height); // setSizeInPixels BEFORE, so &PixelData[0]
if ( Width == 0 || Height == 0 ) return; // nothing to get, area is zero. &PixelData[0] would crash
@ -490,8 +490,9 @@ void XImage::DrawWithoutCompose(INTN x, INTN y, UINTN width, UINTN height)
if ( width == 0 ) width = Width;
if ( height == 0 ) height = Height;
UINTN AreaWidth = (x + width > (UINTN)UGAWidth) ? (UGAWidth - x) : width;
UINTN AreaHeight = (y + height > (UINTN)UGAHeight) ? (UGAHeight - y) : height;
UINTN AreaWidth = (x + width > (UINTN)UGAWidth) ? (x > UGAWidth ? 0 : UGAWidth - x) : width;
UINTN AreaHeight = (y + height > (UINTN)UGAHeight) ? (y > UGAHeight ? 0 : UGAHeight - y) : height;
// DBG("area=%d,%d\n", AreaWidth, AreaHeight);
// prepare protocols
EFI_STATUS Status;
@ -545,8 +546,9 @@ void XImage::Draw(INTN x, INTN y, float scale, bool Opaque)
XImage Top(*this, scale); //can accept 0 as scale
XImage Background(Width, Height);
UINTN AreaWidth = (x + Width > (UINTN)UGAWidth) ? (UGAWidth - x) : Width;
UINTN AreaHeight = (y + Height > (UINTN)UGAHeight) ? (UGAHeight - y) : Height;
UINTN AreaWidth = (x + Width > (UINTN)UGAWidth) ? (x > UGAWidth ? 0 : UGAWidth - x) : Width;
UINTN AreaHeight = (y + Height > (UINTN)UGAHeight) ? (y > UGAHeight ? 0 : UGAHeight - y) : Height;
Background.GetArea(x, y, AreaWidth, AreaHeight); //it will resize the Background image
Background.Compose(0, 0, Top, Opaque);
Background.DrawWithoutCompose(x, y);

4
rEFIt_UEFI/libeg/XTheme.cpp
View File

@ -922,10 +922,10 @@ VOID XTheme::FillRectAreaOfScreen(IN INTN XPos, IN INTN YPos, IN INTN Width, IN
X = 0;
}
if (X + Width > UGAWidth) {
Width = UGAWidth - X;
Width = (X > UGAWidth) ? 0 : (UGAWidth - X);
}
if (YPos + Height > UGAHeight) {
Height = UGAHeight - YPos;
Height = (YPos > UGAHeight) ? 0 : (UGAHeight - YPos);
}
XImage TmpBuffer(Width, Height);