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- /**
- * @module cbitmap
- * @author Manuel Mausz, 0728348
- * @brief Implementation of CFile handling Windows Bitmaps.
- * @date 17.04.2009
- */
-
- #include <boost/lexical_cast.hpp>
- #include <boost/numeric/conversion/cast.hpp>
- #ifdef DEBUG
- # include <iostream>
- #endif
- #include "cbitmap.h"
- #include "cpixelformat_24.h"
-
- using namespace std;
-
- CBitmap::~CBitmap()
- {
- if (m_pixeldata != NULL)
- delete[] m_pixeldata;
- m_pixeldata = NULL;
-
- if (m_pixelformat != NULL)
- delete m_pixelformat;
- m_pixelformat = NULL;
- }
-
- /*----------------------------------------------------------------------------*/
-
- void CBitmap::read(std::ifstream& in)
- {
- /* read and check file header */
- in.read(reinterpret_cast<char *>(&m_fileheader), sizeof(m_fileheader));
-
- if (m_fileheader.bfType[0] != 'B' || m_fileheader.bfType[1] != 'M')
- throw FileError("Imagefile has invalid Bitmap header.");
- /* bfSize is unreliable (http://de.wikipedia.org/wiki/Windows_Bitmap) */
- if (m_fileheader.bfSize < 0)
- throw FileError("Bitmap filesize is less than zero?");
-
- /* read and check info header */
- in.read(reinterpret_cast<char *>(&m_infoheader), sizeof(m_infoheader));
-
- if (m_infoheader.biSize != 40)
- throw FileError("Bitmap info header size is invalid.");
- if (m_infoheader.biPlanes != 1)
- throw FileError("Bitmap color planes is not set to 1.");
- if (m_infoheader.biCompression != 0)
- throw FileError("Bitmap compression is set but not supported.");
- if (m_infoheader.biSizeImage < 0)
- throw FileError("Bitmap image size is less than zero?");
- if (m_infoheader.biClrUsed != 0 || m_infoheader.biClrImportant != 0)
- throw FileError("Bitmap colortable is used but not supported.");
-
- /* currently only 24bit */
- if (m_infoheader.biBitCount != 24)
- throw FileError("Bitmap bitcount is not supported.");
-
- /* read pixel data using separate class */
- if (m_infoheader.biSizeImage > 0)
- {
- if (m_pixeldata != NULL)
- delete[] m_pixeldata;
- m_pixeldata = new uint8_t[m_infoheader.biSizeImage];
- in.read(reinterpret_cast<char *>(m_pixeldata), m_infoheader.biSizeImage);
- }
-
- /* create pixelformat instance */
- if (m_pixelformat != NULL)
- delete m_pixelformat;
- m_pixelformat = NULL;
- if (m_infoheader.biBitCount == 24)
- m_pixelformat = new CPixelFormat_24(this);
- }
-
- /*----------------------------------------------------------------------------*/
-
- void CBitmap::write(std::ofstream& out)
- {
- /* set header values */
- m_fileheader.bfSize = m_infoheader.biSizeImage + sizeof(m_infoheader) + sizeof(m_fileheader);
-
- /* write file header */
- out.write(reinterpret_cast<char *>(&m_fileheader), sizeof(m_fileheader));
-
- /* write info header */
- out.write(reinterpret_cast<char *>(&m_infoheader), sizeof(m_infoheader));
-
- /* write pixel data */
- if (m_pixeldata != NULL)
- out.write(reinterpret_cast<char *>(m_pixeldata), m_infoheader.biSizeImage);
- }
-
- /*----------------------------------------------------------------------------*/
-
- void CBitmap::callFunc(const std::string& func, const std::list<std::string>& params)
- {
- if (func.empty())
- throw FileError("Function name is empty.");
-
- if (func == "fillrect")
- fillrect(params);
- else
- throw FileError("Unknown function '" + func + "'.");
- }
-
- /*----------------------------------------------------------------------------*/
-
- void CBitmap::fillrect(std::list<std::string> params)
- {
- /* check prerequirements */
- if (params.size() != 7)
- throw FileError("Invalid number of function parameters (must be 7).");
-
- /* convert parameters */
- uint32_t pparams[7];
- int i = 0;
- try
- {
- for(i = 0; i < 7; i++)
- {
- pparams[i] = boost::lexical_cast<uint32_t>(params.front());
- params.pop_front();
- }
- }
- catch(boost::bad_lexical_cast& ex)
- {
- throw FileError("Invalid parameter (" + params.front() + ").");
- }
-
- /* width and height can be negativ */
- uint32_t width = static_cast<uint32_t>(abs(m_infoheader.biWidth));
- uint32_t height = static_cast<uint32_t>(abs(m_infoheader.biHeight));
-
- /* check parameter values are in range */
- if (pparams[0] < 0 || pparams[0] > width
- || pparams[1] < 0 || pparams[1] > height)
- throw FileError("At least one x/y-parameter is out of range.");
-
- if (pparams[2] < 0 || pparams[2] + pparams[0] > width
- || pparams[3] < 0 || pparams[3] + pparams[1] > height)
- throw FileError("At least one w/h-parameter is out of range.");
-
- if (pparams[4] < 0 || pparams[4] > 255
- || pparams[5] < 0 || pparams[5] > 255
- || pparams[6] < 0 || pparams[6] > 255)
- throw FileError("At least one pixel color parameter is out of range.");
-
- /* call setPixel for every pixel in the rectangel */
- if (m_pixeldata != NULL && m_pixelformat != NULL)
- {
- for(uint32_t i = pparams[0]; i < pparams[2] + pparams[0]; i++)
- {
- for(uint32_t j = pparams[1]; j < pparams[3] + pparams[1]; j++)
- {
- try
- {
- m_pixelformat->setPixel(&pparams[4], i, j);
- }
- catch(CPixelFormat::PixelFormatError& ex)
- {
- stringstream errstr;
- errstr << "Can't set pixel (pos=" << i << "," << j << " col="
- << pparams[4] << "," << pparams[5] << "," << pparams[6] << "): "
- << ex.what();
- throw FileError(errstr.str());
- }
- }
- }
- }
- }
-
- /*----------------------------------------------------------------------------*/
-
- #ifdef DEBUG
- void CBitmap::dump(std::ostream& out)
- {
- out
- << "Bitmap File Header:" << endl
- << " bfType=" << m_fileheader.bfType[0] << m_fileheader.bfType[1]
- << ", bfSize=" << m_fileheader.bfSize
- << ", bfReserved=" << m_fileheader.bfReserved
- << ", bfOffBits=" << m_fileheader.bfOffBits
- << endl;
-
- out
- << "Bitmap Info Header:" << endl
- << " biSize=" << m_infoheader.biSize
- << ", biWidth=" << m_infoheader.biWidth
- << ", biHeight=" << m_infoheader.biHeight
- << ", biPlanes=" << m_infoheader.biPlanes
- << endl
-
- << " biBitCount=" << m_infoheader.biBitCount
- << ", biCompression=" << m_infoheader.biCompression
- << ", biSizeImage=" << m_infoheader.biSizeImage
- << endl
-
- << " biXPelsPerMeter=" << m_infoheader.biXPelsPerMeter
- << ", biYPelsPerMeter=" << m_infoheader.biYPelsPerMeter
- << ", biClrUsed=" << m_infoheader.biClrUsed
- << ", biClrImportant=" << m_infoheader.biClrImportant
- << endl;
- }
- #endif
-
- /* vim: set et sw=2 ts=2: */
-