/// <summary>
/// The gradient colors.
/// </summary>
/// <param name="Col1">The col 1.</param>
/// <param name="Col2">The col 2.</param>
/// <returns></returns>
/// <remarks></remarks>
public RGBA_COLOR_STRUCT GradientColors(RGBA_COLOR_STRUCT Col1, RGBA_COLOR_STRUCT Col2)
{
RGBA_COLOR_STRUCT ret;
ret.r = (Col1.r * 2 + Col2.r) / 3;
ret.g = (Col1.g * 2 + Col2.g) / 3;
ret.b = (Col1.b * 2 + Col2.b) / 3;
ret.a = 255;
return(ret);
}
/// <summary>
/// The gradient colors half.
/// </summary>
/// <param name="Col1">The col 1.</param>
/// <param name="Col2">The col 2.</param>
/// <returns></returns>
/// <remarks></remarks>
public RGBA_COLOR_STRUCT GradientColorsHalf(RGBA_COLOR_STRUCT Col1, RGBA_COLOR_STRUCT Col2)
{
RGBA_COLOR_STRUCT ret;
ret.r = Col1.r / 2 + Col2.r / 2;
ret.g = Col1.g / 2 + Col2.g / 2;
ret.b = Col1.b / 2 + Col2.b / 2;
ret.a = 255;
return(ret);
}
private static RGBA_COLOR_STRUCT GradientColorsHalf(RGBA_COLOR_STRUCT Col1, RGBA_COLOR_STRUCT Col2)
{
RGBA_COLOR_STRUCT ret;
ret.r = (Col1.r / 2 + Col2.r / 2);
ret.g = (Col1.g / 2 + Col2.g / 2);
ret.b = (Col1.b / 2 + Col2.b / 2);
ret.a = 255;
return(ret);
}
public static byte[] DecodeDXT23(int height, int width, byte[] SourceData)
{
byte[] DestData = new byte[(width * height) * 4];
RGBA_COLOR_STRUCT[] Color = new RGBA_COLOR_STRUCT[4];
int i;
RGBA_COLOR_STRUCT CColor;
int CData;
int ChunksPerHLine = width / 4;
if (ChunksPerHLine == 0)
{
ChunksPerHLine += 1;
}
for (i = 0; i <= (width * height) - 1; i += 16)
{
Color[0] = short_to_rgba(Convert.ToInt32(SourceData[i + 8]) | Convert.ToInt32(SourceData[i + 9]) << 8);
Color[1] = short_to_rgba(Convert.ToInt32(SourceData[i + 10]) | Convert.ToInt32(SourceData[i + 11]) << 8);
Color[2] = GradientColors(Color[0], Color[1]);
Color[3] = GradientColors(Color[1], Color[0]);
CData = (Convert.ToInt32(SourceData[i + 12]) << 0) | (Convert.ToInt32(SourceData[i + 13]) << 8) | (Convert.ToInt32(SourceData[i + 14]) << 16) | (Convert.ToInt32(SourceData[i + 15]) << 24);
int ChunkNum = i / 16;
long XPos = ChunkNum % ChunksPerHLine;
long YPos = (ChunkNum - XPos) / ChunksPerHLine;
long ttmp;
int alpha;
int sizeh = height < 4 ? height : 4;
int sizew = width < 4 ? width : 4;
for (int x = 0; x <= sizeh - 1; x++)
{
alpha = SourceData[i + (2 * x)] | (int)SourceData[i + (2 * x) + 1] << 8;
for (int y = 0; y <= sizew - 1; y++)
{
CColor = Color[CData & 3];
CData >>= 2;
CColor.a = (alpha & 15) * 16;
alpha >>= 4;
ttmp = ((YPos * 4 + x) * width + XPos * 4 + y) * 4;
DestData[ttmp] = (byte)CColor.b;
DestData[ttmp + 1] = (byte)CColor.g;
DestData[ttmp + 2] = (byte)CColor.r;
DestData[ttmp + 3] = (byte)CColor.a;
}
}
}
return(DestData);
}
/// <summary>
/// The rgba_to_int.
/// </summary>
/// <param name="c">The c.</param>
/// <returns>The rgba_to_int.</returns>
/// <remarks></remarks>
public int rgba_to_int(RGBA_COLOR_STRUCT c)
{
return((c.a << 24) | (c.r << 16) | (c.g << 8) | c.b);
}
public static byte[] DecodeDXT1(int height, int width, byte[] SourceData)
{
byte[] DestData = new byte[(width * height) * 4];
RGBA_COLOR_STRUCT[] Color = new RGBA_COLOR_STRUCT[4];
int i;
int dptr = 0;
RGBA_COLOR_STRUCT CColor;
int CData;
int ChunksPerHLine = width / 4;
bool trans;
RGBA_COLOR_STRUCT zeroColor = new RGBA_COLOR_STRUCT();
int c1;
int c2;
if (ChunksPerHLine == 0)
{
ChunksPerHLine += 1;
}
for (i = 0; i <= (width * height) - 1; i += 16)
{
c1 = ((int)SourceData[dptr + 1] << 8) | SourceData[dptr];
c2 = ((int)SourceData[dptr + 3] << 8) | SourceData[dptr + 2];
if (c1 > c2)
{
trans = false;
}
else
{
trans = true;
}
Color[0] = short_to_rgba(c1);
Color[1] = short_to_rgba(c2);
if (!(trans))
{
Color[2] = GradientColors(Color[0], Color[1]);
Color[3] = GradientColors(Color[1], Color[0]);
}
else
{
Color[2] = GradientColorsHalf(Color[0], Color[1]);
Color[3] = zeroColor;
}
CData = (Convert.ToInt32(SourceData[dptr + 4]) << 0) | (Convert.ToInt32(SourceData[dptr + 5]) << 8) | (Convert.ToInt32(SourceData[dptr + 6]) << 16) | (Convert.ToInt32(SourceData[dptr + 7]) << 24);
int ChunkNum = i / 16;
long XPos = ChunkNum % ChunksPerHLine;
long YPos = (ChunkNum - XPos) / ChunksPerHLine;
long ttmp;
int sizeh = height < 4 ? height : 4;
int sizew = width < 4 ? width : 4;
for (int x = 0; x <= sizeh - 1; x++)
{
for (int y = 0; y <= sizew - 1; y++)
{
CColor = Color[CData & 3];
CData >>= 2;
ttmp = ((YPos * 4 + x) * width + XPos * 4 + y) * 4;
DestData[ttmp] = (byte)CColor.b;
DestData[ttmp + 1] = (byte)CColor.g;
DestData[ttmp + 2] = (byte)CColor.r;
DestData[ttmp + 3] = (byte)CColor.a;
}
}
dptr += 8;
}
return(DestData);
}
public static byte[] DecodeDXT45(int height, int width, byte[] SourceData)
{
byte[] DestData = new byte[(width * height) * 4];
RGBA_COLOR_STRUCT[] Color = new RGBA_COLOR_STRUCT[4];
int i;
RGBA_COLOR_STRUCT CColor;
int CData;
int ChunksPerHLine = width / 4;
// TODO: NotImplemented statement: ICSharpCode.SharpRefactory.Parser.AST.VB.ReDimStatement
if (ChunksPerHLine == 0)
{
ChunksPerHLine += 1;
}
for (i = 0; i <= (width * height) - 1; i += 16)
{
Color[0] = short_to_rgba(Convert.ToInt32(SourceData[i + 8]) | Convert.ToInt32(SourceData[i + 9]) << 8);
Color[1] = short_to_rgba(Convert.ToInt32(SourceData[i + 10]) | Convert.ToInt32(SourceData[i + 11]) << 8);
Color[2] = GradientColors(Color[0], Color[1]);
Color[3] = GradientColors(Color[1], Color[0]);
CData = (Convert.ToInt32(SourceData[i + 12]) << 0) | (Convert.ToInt32(SourceData[i + 13]) << 8) | (Convert.ToInt32(SourceData[i + 14]) << 16) | (Convert.ToInt32(SourceData[i + 15]) << 24);
byte[] Alpha = new byte[8];
Alpha[0] = SourceData[i];
Alpha[1] = SourceData[i + 1];
if ((Alpha[0] > Alpha[1]))
{
Alpha[2] = (byte)((6 * Alpha[0] + 1 * Alpha[1] + 3) / 7);
Alpha[3] = (byte)((5 * Alpha[0] + 2 * Alpha[1] + 3) / 7);
Alpha[4] = (byte)((4 * Alpha[0] + 3 * Alpha[1] + 3) / 7);
Alpha[5] = (byte)((3 * Alpha[0] + 4 * Alpha[1] + 3) / 7);
Alpha[6] = (byte)((2 * Alpha[0] + 5 * Alpha[1] + 3) / 7);
Alpha[7] = (byte)((1 * Alpha[0] + 6 * Alpha[1] + 3) / 7);
}
else
{
Alpha[2] = (byte)((4 * Alpha[0] + 1 * Alpha[1] + 2) / 5);
Alpha[3] = (byte)((3 * Alpha[0] + 2 * Alpha[1] + 2) / 5);
Alpha[4] = (byte)((2 * Alpha[0] + 3 * Alpha[1] + 2) / 5);
Alpha[5] = (byte)((1 * Alpha[0] + 4 * Alpha[1] + 2) / 5);
Alpha[6] = 0;
Alpha[7] = 255;
}
long tmpdword;
uint tmpword;
long alphaDat;
tmpword = SourceData[i + 2] | (Convert.ToUInt32(SourceData[i + 3]) << 8);
tmpdword = SourceData[i + 4] | (Convert.ToInt32(SourceData[i + 5]) << 8) | (SourceData[i + 6] << 16) | (Convert.ToInt32(SourceData[i + 7]) << 24);
alphaDat = tmpword | (tmpdword << 16);
int ChunkNum = i / 16;
long XPos = ChunkNum % ChunksPerHLine;
long YPos = (ChunkNum - XPos) / ChunksPerHLine;
long ttmp;
int sizeh = height < 4 ? height : 4;
int sizew = width < 4 ? width : 4;
for (int x = 0; x <= sizeh - 1; x++)
{
for (int y = 0; y <= sizew - 1; y++)
{
CColor = Color[CData & 3];
CData >>= 2;
CColor.a = Alpha[alphaDat & 7];
alphaDat >>= 3;
ttmp = ((YPos * 4 + x) * width + XPos * 4 + y) * 4;
DestData[ttmp] = (byte)CColor.b;
DestData[ttmp + 1] = (byte)CColor.g;
DestData[ttmp + 2] = (byte)CColor.r;
DestData[ttmp + 3] = (byte)CColor.a;
}
}
}
return(DestData);
}
/// <summary>
/// The rgba_to_int.
/// </summary>
/// <param name="c">The c.</param>
/// <returns>The rgba_to_int.</returns>
/// <remarks></remarks>
public int rgba_to_int(RGBA_COLOR_STRUCT c)
{
return (c.a << 24) | (c.r << 16) | (c.g << 8) | c.b;
}
/// <summary>
/// The gradient colors half.
/// </summary>
/// <param name="Col1">The col 1.</param>
/// <param name="Col2">The col 2.</param>
/// <returns></returns>
/// <remarks></remarks>
public RGBA_COLOR_STRUCT GradientColorsHalf(RGBA_COLOR_STRUCT Col1, RGBA_COLOR_STRUCT Col2)
{
RGBA_COLOR_STRUCT ret;
ret.r = Col1.r / 2 + Col2.r / 2;
ret.g = Col1.g / 2 + Col2.g / 2;
ret.b = Col1.b / 2 + Col2.b / 2;
ret.a = 255;
return ret;
}
/// <summary>
/// The gradient colors.
/// </summary>
/// <param name="Col1">The col 1.</param>
/// <param name="Col2">The col 2.</param>
/// <returns></returns>
/// <remarks></remarks>
public RGBA_COLOR_STRUCT GradientColors(RGBA_COLOR_STRUCT Col1, RGBA_COLOR_STRUCT Col2)
{
RGBA_COLOR_STRUCT ret;
ret.r = (Col1.r * 2 + Col2.r) / 3;
ret.g = (Col1.g * 2 + Col2.g) / 3;
ret.b = (Col1.b * 2 + Col2.b) / 3;
ret.a = 255;
return ret;
}
