public static int vgl_GetDDSStride(ref DDS_FILE_HEADER header, int width)
{
if (header.std_header.ddspf.dwFlags == DDSSignal.DDS_DDPF_FOURCC &&
header.std_header.ddspf.dwFourCC == DDSSignal.DDS_FOURCC_DX10)
{
if (header.dxt10_header.format < vermilion.NUM_DDS_FORMATS)
{
DDS_FORMAT_GL_INFO format = InfoTable.gl_info_table[header.dxt10_header.format];
return((format.bits_per_texel * width + 7) / 8);
}
}
else
{
switch (header.std_header.ddspf.dwFlags)
{
case DDSSignal.DDS_DDPF_RGB:
return(width * 3);
case (DDSSignal.DDS_DDPF_RGB | DDSSignal.DDS_DDPF_ALPHA):
case (DDSSignal.DDS_DDPF_RGB | DDSSignal.DDS_DDPF_ALPHAPIXELS):
return(width * 4);
case DDSSignal.DDS_DDPF_ALPHA:
return(width);
default:
break;
}
}
return(0);
}
public static bool vgl_DDSHeaderToImageDataHeader(ref DDS_FILE_HEADER header, ref vglImageData image)
{
image.swizzle = new uint[4];
if (header.std_header.ddspf.dwFlags == DDSSignal.DDS_DDPF_FOURCC &&
header.std_header.ddspf.dwFourCC == DDSSignal.DDS_FOURCC_DX10)
{
if (header.dxt10_header.format < vermilion.NUM_DDS_FORMATS)
{
DDS_FORMAT_GL_INFO format = InfoTable.gl_info_table[header.dxt10_header.format];
image.format = format.format;
image.type = format.type;
image.internalFormat = format.internalFormat;
image.swizzle[0] = format.swizzle_r;
image.swizzle[1] = format.swizzle_g;
image.swizzle[2] = format.swizzle_b;
image.swizzle[3] = format.swizzle_a;
image.mipLevels = (int)header.std_header.mip_levels;
return(true);
}
}
else if (header.std_header.ddspf.dwFlags == DDSSignal.DDS_DDPF_FOURCC)
{
image.swizzle[0] = GL.GL_RED;
image.swizzle[1] = GL.GL_GREEN;
image.swizzle[2] = GL.GL_BLUE;
image.swizzle[3] = GL.GL_ALPHA;
image.mipLevels = (int)header.std_header.mip_levels;
switch (header.std_header.ddspf.dwFourCC)
{
case 116:
image.format = GL.GL_RGBA;
image.type = GL.GL_FLOAT;
image.internalFormat = GL.GL_RGBA32F;
/*
* image.swizzle[0] = GL.GL_ALPHA;
* image.swizzle[1] = GL.GL_BLUE;
* image.swizzle[2] = GL.GL_GREEN;
* image.swizzle[3] = GL.GL_RED;
*/
return(true);
default:
break;
}
}
else
{
image.swizzle[0] = GL.GL_RED;
image.swizzle[1] = GL.GL_GREEN;
image.swizzle[2] = GL.GL_BLUE;
image.swizzle[3] = GL.GL_ALPHA;
image.mipLevels = (int)header.std_header.mip_levels;
switch (header.std_header.ddspf.dwFlags)
{
case DDSSignal.DDS_DDPF_RGB:
image.format = GL.GL_BGR;
image.type = GL.GL_UNSIGNED_BYTE;
image.internalFormat = GL.GL_RGB8;
image.swizzle[3] = GL.GL_ONE;
return(true);
case (DDSSignal.DDS_DDPF_RGB | DDSSignal.DDS_DDPF_ALPHA):
case (DDSSignal.DDS_DDPF_RGB | DDSSignal.DDS_DDPF_ALPHAPIXELS):
image.format = GL.GL_BGRA;
image.type = GL.GL_UNSIGNED_BYTE;
image.internalFormat = GL.GL_RGBA8;
return(true);
case DDSSignal.DDS_DDPF_ALPHA:
image.format = GL.GL_RED;
image.type = GL.GL_UNSIGNED_BYTE;
image.internalFormat = GL.GL_R8;
image.swizzle[0] = image.swizzle[1] = image.swizzle[2] = GL.GL_ZERO;
image.swizzle[3] = GL.GL_RED;
return(true);
case DDSSignal.DDS_DDPF_LUMINANCE:
image.format = GL.GL_RED;
image.type = GL.GL_UNSIGNED_BYTE;
image.internalFormat = GL.GL_R8;
image.swizzle[0] = image.swizzle[1] = image.swizzle[2] = GL.GL_RED;
image.swizzle[3] = GL.GL_ONE;
return(true);
case (DDSSignal.DDS_DDPF_LUMINANCE | DDSSignal.DDS_DDPF_ALPHA):
image.format = GL.GL_RG;
image.type = GL.GL_UNSIGNED_BYTE;
image.internalFormat = GL.GL_RG8;
image.swizzle[0] = image.swizzle[1] = image.swizzle[2] = GL.GL_RED;
image.swizzle[3] = GL.GL_GREEN;
return(true);
default:
break;
}
}
image.format = image.type = image.internalFormat = GL.GL_NONE;
image.swizzle[0] = image.swizzle[1] = image.swizzle[2] = image.swizzle[3] = GL.GL_ZERO;
return(false);
}
