void PLBmpDecoder::Open (PLDataSource * pDataSrc)
{
m_pBMI = getInfoHeader (pDataSrc, &m_Pal[0]);
PLPixelFormat pf;
if (m_pBMI->biBitCount <= 8) {
pf = PLPixelFormat::L8;
} else {
if (m_pBMI->biBitCount == 32) {
pf = PLPixelFormat::A8R8G8B8;
} else {
pf = PLPixelFormat::X8R8G8B8;
}
}
PLPoint DPI(0,0);
if (m_pBMI->biXPelsPerMeter > 0)
DPI.x = (int)((float)m_pBMI->biXPelsPerMeter / 39.37f+0.5);
if (DPI.x <= 1)
DPI.x = 0;
if (m_pBMI->biYPelsPerMeter > 0)
DPI.y = (int)((float)m_pBMI->biYPelsPerMeter / 39.37f+0.5);
if (DPI.y <= 1)
DPI.y = 0;
SetBmpInfo (PLPoint (m_pBMI->biWidth, m_pBMI->biHeight),
DPI, pf);
}
int main (int argc, char** argv)
{
// for storing results of argument processing
// general
bool displayInfo = true;
char* inFileName = "";
// threshold filter
bool runThreshold = false;
float threshold = THRESH_ERROR;
// crop
bool runCrop = false;
int cropWidth = CROP_DIM_ERROR;
int cropHeight = CROP_DIM_ERROR;
int cropStart[] = {0,0};
// resize
bool runResize = false;
float scaling = SCALING_ERROR;
char* resType = "";
// default output file name
char* outFileName = "out.bmp";
// process arguments, checking for errors
if (processArguments(argc, argv, &runThreshold, &runCrop, &runResize,
&displayInfo, &inFileName, &outFileName, &threshold, &cropWidth,
&cropHeight, cropStart, &scaling, &resType) != EXIT_SUCCESS)
{
fprintf(stderr, "Unable to process arguments.\n");
return EXIT_FAILURE;
}
// open the file
FILE *inFile = fopen(inFileName, "r");
// check that file opened okay
if (inFile == NULL)
{
fprintf(stderr, "Unable to open file: %s\n", inFileName);
return EXIT_FAILURE;
}
// read in the file header and check that it went okay
struct bmpFileHeader *fileHead = getFileHeader(inFile);
if (fileHead == NULL)
{
fprintf(stderr, "Unable to set up file header.\n");
return EXIT_FAILURE;
}
struct bmpInfoHeader *infoHead = getInfoHeader(inFile);
if (infoHead == NULL)
{
fprintf(stderr, "Unable to set up info header.\n");
return EXIT_FAILURE;
}
// check the format of the file
if (formatCheck(fileHead, infoHead) != EXIT_SUCCESS)
{
fprintf(stderr, "Program cannot handle this format.\n");
return EXIT_FAILURE;
}
// if we're displaying info, do so
if (displayInfo)
{
// print out header information
printInfo(fileHead, infoHead);
}
// move file pointer on to start of image, if necessary
if (fileHead->offset != (sizeof(struct bmpFileHeader) +
sizeof(struct bmpInfoHeader)))
{
fseek(inFile,
((int)fileHead->offset - (sizeof(struct bmpFileHeader) +
sizeof(struct bmpInfoHeader))), SEEK_CUR);
}
// if we're running a threshold filter, do so
if (runThreshold)
{
// apply threshold filter to image, checking for errors
if (applyThreshold(inFile, fileHead, infoHead, outFileName, threshold)
== EXIT_FAILURE)
{
fprintf(stderr, "Unable to apply threshold.\n");
return EXIT_FAILURE;
}
}
// if we're cropping the image, do so
if (runCrop)
{
// crop the image, checking for errors
if (cropImage(inFile, fileHead, infoHead, outFileName, cropWidth,
cropHeight, cropStart) == EXIT_FAILURE)
{
fprintf(stderr, "Unable to crop image.\n");
return EXIT_FAILURE;
}
}
// if we're resizing the image do so
if (runResize)
{
// resize image checking for errors
if (resizeImage(inFile, fileHead, infoHead, outFileName, scaling, resType)
== EXIT_FAILURE)
{
fprintf(stderr, "Unable to resize image.\n");
return EXIT_FAILURE;
}
}
// free up allocated memory
free(infoHead);
free(fileHead);
// close input file, checking for errors
if (fclose(inFile) != 0)
{
fprintf(stderr, "Unable to close input file.\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}