/// <summary>
/// releases the memory used for the image
/// </summary>
/// <param name="psInfo"></param>
public static void tgaDestroy(tImageTGA psInfo)
{
if (psInfo != null)
{
if (psInfo.imageData != null)
{
psInfo.imageData = null;
//free();
}
psInfo = null;
}
}
/// <summary>
/// load the image header fields. We only keep those that matter!
/// </summary>
/// <param name="?"></param>
/// <returns></returns>
public static bool tgaLoadHeader(byte[] Buffer, UInt64 bufSize, tImageTGA psInfo)
{
bool bRet = false;
//do
//{
// UInt64 step = sizeof(char) * 2;
// if ((step + sizeof(char)) > bufSize)
// {
// break;
// }
// memcpy(psInfo.type, Buffer + step, sizeof(char));
// step += sizeof(char) * 2;
// step += sizeof(short) * 4;
// if ((step + sizeof(short) * 2 + sizeof(char)) > bufSize)
// {
// break;
// }
// memcpy(psInfo.width, Buffer + step, sizeof(short));
// memcpy(psInfo.height, Buffer + step + sizeof(short), sizeof(short));
// memcpy(psInfo.pixelDepth, Buffer + step + sizeof(short) * 2, sizeof(char));
// step += sizeof(char);
// step += sizeof(short) * 2;
// if ((step + sizeof(char)) > bufSize)
// {
// break;
// }
// char cGarbage;
// memcpy(cGarbage, Buffer + step, sizeof(char));
// psInfo.flipped = 0;
// if (cGarbage & 0x20)
// {
// psInfo.flipped = 1;
// }
// bRet = true;
//} while (0);
return(bRet);
}
/// <summary>
/// loads the image pixels. You shouldn't call this function directly
/// </summary>
/// <param name="?"></param>
/// <returns></returns>
public static bool tgaLoadImageData(byte[] Buffer, UInt64 bufSize, tImageTGA psInfo)
{
bool bRet = false;
//do
//{
// int mode, total, i;
// char aux;
// UInt64 step = (sizeof(char) + sizeof(short)) * 6;
// // mode equal the number of components for each pixel
// mode = psInfo.pixelDepth / 8;
// // total is the number of unsigned chars we'll have to read
// total = psInfo.height * psInfo.width * mode;
// size_t dataSize = sizeof(char) * total;
// if ((step + dataSize) > bufSize)
// {
// break;
// }
// memcpy(psInfo.imageData, Buffer + step, dataSize);
// // mode=3 or 4 implies that the image is RGB(A). However TGA
// // stores it as BGR(A) so we'll have to swap R and B.
// if (mode >= 3)
// {
// for (i = 0; i < total; i += mode)
// {
// aux = psInfo.imageData[i];
// psInfo.imageData[i] = psInfo.imageData[i + 2];
// psInfo.imageData[i + 2] = aux;
// }
// }
// bRet = true;
//} while (0);
return(bRet);
}
bool tgaLoadRLEImageData(byte[] Buffer, UInt64 bufSize, tImageTGA psInfo)
{
throw new NotImplementedException();
}
/// <summary>
/// converts RGB to greyscale
/// </summary>
/// <param name="psInfo"></param>
public static void tgaRGBtogreyscale(tImageTGA psInfo)
{
throw new NotImplementedException();
}
/// <summary>
/// this is the function to call when we want to load an image
/// </summary>
/// <param name="?"></param>
/// <returns></returns>
public static tImageTGA tgaLoad(string pszFilename)
{
int mode, total;
tImageTGA info = null;
CCFileData data = new CCFileData(pszFilename, "rb");
UInt64 nSize = data.Size;
byte[] pBuffer = data.Buffer;
//do
//{
// if (pBuffer == null)
// {
// break;
// }
// //info = malloc(sizeof(tImageTGA)) as tImageTGA;
// // get the file header info
// if (tgaLoadHeader(pBuffer, nSize, info) == null)
// {
// info.status = (int)TGAEnum.TGA_ERROR_MEMORY;
// break;
// }
// // check if the image is color indexed
// if (info.type == 1)
// {
// info.status = (int)TGAEnum.TGA_ERROR_INDEXED_COLOR;
// break;
// }
// // check for other types (compressed images)
// if ((info.type != 2) && (info.type != 3) && (info.type != 10))
// {
// info.status = (int)TGAEnum.TGA_ERROR_COMPRESSED_FILE;
// break;
// }
// // mode equals the number of image components
// mode = info.pixelDepth / 8;
// // total is the number of unsigned chars to read
// total = info.height * info.width * mode;
// // allocate memory for image pixels
// // info.imageData = (char[])malloc(sizeof(unsigned char) * total);
// // check to make sure we have the memory required
// if (info.imageData == null)
// {
// info.status = (int)TGAEnum.TGA_ERROR_MEMORY;
// break;
// }
// bool bLoadImage = false;
// // finally load the image pixels
// if (info.type == 10)
// {
// bLoadImage = tgaLoadRLEImageData(pBuffer,nSize, info);
// }
// else
// {
// bLoadImage = tgaLoadImageData(pBuffer, nSize, info);
// }
// // check for errors when reading the pixels
// if (!bLoadImage)
// {
// info.status = TGAEnum.TGA_ERROR_READING_FILE;
// break;
// }
// info->status = TGA_OK;
// if (info->flipped)
// {
// tgaFlipImage(info);
// if (info->flipped)
// {
// info->status = TGA_ERROR_MEMORY;
// }
// }
//} while (0);
return(info);
}