blob: 2f98cc78ed20f6896379f68c29f083c52ba0e831 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/**
* @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"
#include "cbitmap.h"
using namespace std;
void CPixelFormat_BGR555::getPixel(RGBPIXEL& pixel, uint32_t x, uint32_t y)
{
if (m_bitmap->getPixelData() == NULL)
throw PixelFormatError("No pixelbuffer allocated.");
/* calc rowsize - boundary is 32 */
uint32_t rowsize = 4 * static_cast<uint32_t>(
((getBitCount() * m_bitmap->getWidth()) + 31) / 32
);
/* if the y-coordinates are mirrored */
if (m_bitmap->isMirrored())
y = m_bitmap->getHeight() - y - 1;
uint32_t offset = y * rowsize + x * (4 * getBitCount() / 32);
/* boundary check */
if (offset + getBitCount()/8 > m_bitmap->getPixelDataSize())
throw PixelFormatError("Pixel position is out of range.");
/* get pixel */
uint8_t *o = m_bitmap->getPixelData() + offset;
pixel.blue = (*(uint16_t *)o & BGR555_BLUE_MASK) >> BGR555_BLUE_SHIFT;
pixel.green = (*(uint16_t *)o & BGR555_GREEN_MASK) >> BGR555_GREEN_SHIFT;
pixel.red = (*(uint16_t *)o & BGR555_RED_MASK) >> BGR555_RED_SHIFT;
}
/*----------------------------------------------------------------------------*/
void CPixelFormat_BGR555::setPixel(const RGBPIXEL& pixel, uint32_t x, uint32_t y)
{
if (m_bitmap->getPixelData() == NULL)
throw PixelFormatError("No pixelbuffer allocated.");
/* calc rowsize - boundary is 32 */
uint32_t rowsize = 4 * static_cast<uint32_t>(
((getBitCount() * m_bitmap->getWidth()) + 31) / 32
);
/* if the y-coordinates are mirrored */
if (m_bitmap->isMirrored())
y = m_bitmap->getHeight() - y - 1;
uint32_t offset = y * rowsize + x * (4 * getBitCount() / 32);
/* boundary check */
if (offset + getBitCount()/8 > m_bitmap->getPixelDataSize())
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.blue << BGR555_BLUE_SHIFT) & BGR555_BLUE_MASK) |
((pixel.green << BGR555_GREEN_SHIFT) & BGR555_GREEN_MASK) |
((pixel.red << BGR555_RED_SHIFT) & BGR555_RED_MASK));
}
/* vim: set et sw=2 ts=2: */
|
