// Token: 0x06000084 RID: 132 RVA: 0x0000DBC0 File Offset: 0x0000BDC0
public static void ReadGifPictureData(int width, int height, bool interlaced, ref byte[] gfxData, int offset)
{
int[] array = new int[]
{
0,
4,
2,
1
};
int[] array2 = new int[]
{
8,
8,
4,
2
};
GifLoader.InitGifDecoder();
if (interlaced)
{
for (int i = 0; i < 4; i++)
{
for (int j = array[i]; j < height; j += array2[i])
{
GifLoader.ReadGifLine(ref gfxData, width, j * width + offset);
}
}
return;
}
for (int j = 0; j < height; j++)
{
GifLoader.ReadGifLine(ref gfxData, width, j * width + offset);
}
}
// Token: 0x06000086 RID: 134 RVA: 0x0000DF74 File Offset: 0x0000C174
private static int ReadGifCode()
{
while (GifLoader.gifDecoder.shiftState < GifLoader.gifDecoder.runningBits)
{
byte b = GifLoader.ReadGifByte();
GifLoader.gifDecoder.shiftData |= (uint)((uint)b << GifLoader.gifDecoder.shiftState);
GifLoader.gifDecoder.shiftState += 8;
}
int result = (int)((ulong)GifLoader.gifDecoder.shiftData & (ulong)((long)GifLoader.codeMasks[GifLoader.gifDecoder.runningBits]));
GifLoader.gifDecoder.shiftData >>= GifLoader.gifDecoder.runningBits;
GifLoader.gifDecoder.shiftState -= GifLoader.gifDecoder.runningBits;
if (++GifLoader.gifDecoder.runningCode > GifLoader.gifDecoder.maxCodePlusOne && GifLoader.gifDecoder.runningBits < 12)
{
GifLoader.gifDecoder.maxCodePlusOne <<= 1;
GifLoader.gifDecoder.runningBits++;
}
return(result);
}
// Token: 0x06000085 RID: 133 RVA: 0x0000DC3C File Offset: 0x0000BE3C
public static void ReadGifLine(ref byte[] line, int length, int offset)
{
int i = 0;
int num = GifLoader.gifDecoder.stackPtr;
int eofCode = GifLoader.gifDecoder.eofCode;
int clearCode = GifLoader.gifDecoder.clearCode;
int num2 = GifLoader.gifDecoder.prevCode;
if (num != 0)
{
while (num != 0)
{
if (i >= length)
{
break;
}
line[offset++] = GifLoader.gifDecoder.stack[--num];
i++;
}
}
while (i < length)
{
int num3 = GifLoader.ReadGifCode();
if (num3 == eofCode)
{
if (i != length - 1 | GifLoader.gifDecoder.pixelCount != 0U)
{
return;
}
i++;
}
else if (num3 == clearCode)
{
for (int j = 0; j <= 4095; j++)
{
GifLoader.gifDecoder.prefix[j] = 4098U;
}
GifLoader.gifDecoder.runningCode = GifLoader.gifDecoder.eofCode + 1;
GifLoader.gifDecoder.runningBits = GifLoader.gifDecoder.depth + 1;
GifLoader.gifDecoder.maxCodePlusOne = 1 << GifLoader.gifDecoder.runningBits;
num2 = (GifLoader.gifDecoder.prevCode = 4098);
}
else
{
if (num3 < clearCode)
{
line[offset] = (byte)num3;
offset++;
i++;
}
else
{
if (num3 < 0 | num3 > 4095)
{
return;
}
int num4;
if (GifLoader.gifDecoder.prefix[num3] == 4098U)
{
if (num3 != GifLoader.gifDecoder.runningCode - 2)
{
return;
}
num4 = num2;
GifLoader.gifDecoder.suffix[GifLoader.gifDecoder.runningCode - 2] = (GifLoader.gifDecoder.stack[num++] = GifLoader.TracePrefix(ref GifLoader.gifDecoder.prefix, num2, clearCode));
}
else
{
num4 = num3;
}
int j = 0;
while (j++ <= 4095 && num4 > clearCode && num4 <= 4095)
{
GifLoader.gifDecoder.stack[num++] = GifLoader.gifDecoder.suffix[num4];
num4 = (int)GifLoader.gifDecoder.prefix[num4];
}
if (j >= 4095 | num4 > 4095)
{
return;
}
GifLoader.gifDecoder.stack[num++] = (byte)num4;
while (num != 0 && i < length)
{
line[offset++] = GifLoader.gifDecoder.stack[--num];
i++;
}
}
if (num2 != 4098)
{
if (GifLoader.gifDecoder.runningCode < 2 | GifLoader.gifDecoder.runningCode > 4097)
{
return;
}
GifLoader.gifDecoder.prefix[GifLoader.gifDecoder.runningCode - 2] = (uint)num2;
if (num3 == GifLoader.gifDecoder.runningCode - 2)
{
GifLoader.gifDecoder.suffix[GifLoader.gifDecoder.runningCode - 2] = GifLoader.TracePrefix(ref GifLoader.gifDecoder.prefix, num2, clearCode);
}
else
{
GifLoader.gifDecoder.suffix[GifLoader.gifDecoder.runningCode - 2] = GifLoader.TracePrefix(ref GifLoader.gifDecoder.prefix, num3, clearCode);
}
}
num2 = num3;
}
}
GifLoader.gifDecoder.prevCode = num2;
GifLoader.gifDecoder.stackPtr = num;
}