private static void ProccesImage(string fileName)
{
if (fileName.EndsWith(".bmp", StringComparison.OrdinalIgnoreCase))
{
BMPImage bmp = new BMPImage(fileName.Remove(fileName.Length-4));
DDSImage dds = ImageCompression.ConvertBMPToDDS(bmp);
Console.WriteLine("Saved");
}
else if(fileName.EndsWith(".dds", StringComparison.OrdinalIgnoreCase))
{
DDSImage dds = new DDSImage(fileName.Remove(fileName.Length-4));
BMPImage bmp = ImageCompression.ConvertDDSToBMP(dds);
Console.WriteLine("Saved");
}
else
{
Console.WriteLine(fileName+ " File not supported");
}
}
public static BMPImage ConvertDDSToBMP(DDSImage dds)
{
//Creates new empty BMP file
BMPImage bmp = new BMPImage((UInt32)dds.Width, (UInt32)dds.Height);
//container for colors
RGBColor[] colors = new RGBColor[4];
int texelsX = (int)dds.Width / 4;
int x, y = 0;
//iterates through all data in DDS file
for (int i = 0; i < dds.ImageDataLength; i++)
{
DDSImage.TexelBlock t = dds.GetImageData(i);
colors = ReadMainColors(t);
RGBColor color = new RGBColor(0,0,0);
byte[] texelCol = new byte[4];
for (int k=0;k<t.blocks.Length;k++)
{
texelCol[0] = (byte)(t.blocks[k] & 0x3);
texelCol[1] = (byte)((t.blocks[k] & 0xC) >> 2);
texelCol[2] = (byte)((t.blocks[k] & 0x30) >> 4);
texelCol[3] = (byte)((t.blocks[k] & 0xC0) >> 6);
for (int j = 0; j < 4; j++)
{
color = colors[texelCol[j]];
x = (i % texelsX) * 4 + j;
y = ((int)dds.Height - 1) - ((i / texelsX) * 4) - k;
bmp.AddImageData(x, y, color);
}
}
}
bmp.Save(dds.FileName);
return bmp;
}
public static DDSImage ConvertBMPToDDS(BMPImage bmp)
{
// In this algorithm (0,0) is the lower left corner because BMP data starts from there
DDSImage dds = new DDSImage(bmp.Width,bmp.Height);
for (int y = 0; y< bmp.Height; y += 4)
{
for (int x = 0; x < bmp.Width; x += 4)
{
RGBColor[] block = new RGBColor[DDSConst.DDS_BLOCK_SIZE];
for (int i = 0; i < block.Length; i++)
{
block[i] = bmp.GetImageData(x +(i%4) , (int)bmp.Height - 1 - (y + (i / 4)));
}
dds.AddImageData(CompressDataBlock(block));
}
}
dds.Save(bmp.FileName);
return dds;
}
private static RGBColor[] ReadMainColors(DDSImage.TexelBlock texel)
{
RGBColor[] colors = new RGBColor[4];
RGBColor rgbColor0 = ImageUtils.ConvertRGB565ToRGB888(texel.color0);
RGBColor rgbColor1 = ImageUtils.ConvertRGB565ToRGB888(texel.color1);
RGBColor rgbColor2 = new RGBColor(
(int)((2.0f / 3.0f) * rgbColor0.R + (1.0f / 3.0f) * rgbColor1.R),
(int)((2.0f / 3.0f) * rgbColor0.G + (1.0f / 3.0f) * rgbColor1.G),
(int)((2.0f / 3.0f) * rgbColor0.B + (1.0f / 3.0f) * rgbColor1.B));
RGBColor rgbColor3 = new RGBColor(
(int)((1.0f / 3.0f) * rgbColor0.R + (2.0f / 3.0f) * rgbColor1.R),
(int)((1.0f / 3.0f) * rgbColor0.G + (2.0f / 3.0f) * rgbColor1.G),
(int)((1.0f / 3.0f) * rgbColor0.B + (2.0f / 3.0f) * rgbColor1.B));
colors[0] = rgbColor0;
colors[1] = rgbColor1;
colors[2] = rgbColor2;
colors[3] = rgbColor3;
return colors;
}