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/**
* @module cpixelformat_BGR555
* @author Guenther Neuwirth (0626638), Manuel Mausz (0728348)
* @brief Implementation of CPixelFormat handling BGR555 color (real color)
* Windows Bitmaps.
* @date 18.04.2009
*/
#include <boost/numeric/conversion/cast.hpp>
#include "cpixelformat_bgr555.h"
using namespace std;
void CPixelFormat_BGR555::setPixel(const uint32_t *pixel, uint32_t x, uint32_t y)
{
/*
* pixel[0] ... red
* pixel[1] ... green
* pixel[2] ... blue
*/
if (m_bitmap->getPixelData() == NULL)
throw PixelFormatError("No pixelbuffer allocated.");
/* calc rowsize - boundary is 32 */
uint32_t rowsize = 4 * static_cast<uint32_t>(
((CPixelFormat_BGR555::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 + getBitCount()/8 > m_bitmap->getInfoHeader().biSizeImage)
throw PixelFormatError("Pixel position is out of range.");
/* convert color values to correct types */
uint8_t *o = m_bitmap->getPixelData() + offset;
*(uint16_t *)o = (uint16_t)(((pixel[2] << BGR555_BLUE_SHIFT) & BGR555_BLUE_MASK) |
((pixel[1] << BGR555_GREEN_SHIFT) & BGR555_GREEN_MASK) |
((pixel[0] << BGR555_RED_SHIFT) & BGR555_RED_MASK));
}
/* vim: set et sw=2 ts=2: */
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