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/**
* @module cpixelformat_24
* @author Manuel Mausz, 0728348
* @brief Implementation of CPixelFormat handling 24bit color Windows Bitmaps.
* @date 18.04.2009
*/
#include <boost/numeric/conversion/cast.hpp>
#include "cpixelformat_24.h"
using namespace std;
void CPixelFormat_24::setPixel(const uint32_t *pixel, uint32_t x, uint32_t y)
{
if (m_bitmap->getPixelData() == NULL)
throw PixelFormatError("No pixelbuffer allocated.");
uint32_t rowsize = 4 * static_cast<uint32_t>(
((CPixelFormat_24::getBitCount() * abs(m_bitmap->getInfoHeader().biWidth)) + 31) / 32
);
/* if height is positive the y-coordinates are mirrored */
if (m_bitmap->getInfoHeader().biHeight > 0)
y = m_bitmap->getInfoHeader().biHeight - y - 1;
uint32_t offset = y * rowsize + x * (4 * getBitCount() / 32);
/* boundary check */
if (offset + 3 * sizeof(uint8_t) > m_bitmap->getInfoHeader().biSizeImage)
throw PixelFormatError("Pixel position is out of range.");
/* convert color values to correct types */
uint8_t data[3];
try
{
data[0] = boost::numeric_cast<uint8_t>(pixel[2]);
data[1] = boost::numeric_cast<uint8_t>(pixel[1]);
data[2] = boost::numeric_cast<uint8_t>(pixel[0]);
}
catch(boost::numeric::bad_numeric_cast& ex)
{
throw PixelFormatError("Unable to convert pixelcolor to correct size: " + string(ex.what()));
}
copy(data, data + 3, m_bitmap->getPixelData() + offset);
}
/* vim: set et sw=2 ts=2: */
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