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check for index in range

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This commit is contained in:
Denis Molony 2016-02-24 13:34:00 +11:00
parent 52cfdebb63
commit 054fc41878
1 changed files with 5 additions and 5 deletions
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10
src/com/bytezone/diskbrowser/applefile/IconFile.java
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@ -26,7 +26,7 @@ public class IconFile extends AbstractFile
while (true)
{
int dataLen = HexFormatter.getWord (buffer, ptr);
if (dataLen == 0)
if (dataLen == 0 || (dataLen + ptr) > buffer.length)
break;
icons.add (new Icon (buffer, ptr));
ptr += dataLen;
@ -146,7 +146,7 @@ public class IconFile extends AbstractFile
/*
Offset Color RGB Mini-Palette
0 Black 000 0
1 Blue 00F 1
2 Yellow FF0 2
@ -166,16 +166,16 @@ public class IconFile extends AbstractFile
15 White FFF 3
The displayMode word bits are defined as:
Bit 0 selectedIconBit 1 = invert image before copying
Bit 1 openIconBit 1 = copy light-gray pattern instead of image
Bit 2 offLineBit 1 = AND light-gray pattern to image being copied
Bits 3-7 reserved.
Bits 8-11 foreground color to apply to black part of black & white icons
Bits 12-15 background color to apply to white part of black & white icons
Bits 0-2 can occur at once and are tested in the order 1-2-0.
"Color is only applied to the black and white icons if bits 15-8 are not all 0.
Colored pixels in an icon are inverted by black pixels becoming white and any
other color of pixel becoming black."