aiie/opencv/opencv-printer.cpp

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#include "opencv-printer.h"
#include "opencv2/core/core.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/calib3d/calib3d.hpp"
#include "opencv2/features2d/features2d.hpp"
using namespace cv;
using namespace std;
#define WINDOWNAME "printer"
#define HEIGHT 800
#define NATIVEWIDTH 960 // FIXME: printer can change density...
//#define WIDTH 384 // emulating the teeny printer I've got
#define WIDTH 960
OpenCVPrinter::OpenCVPrinter()
{
pixels = new Mat(HEIGHT, WIDTH, CV_8U);
*pixels = cv::Scalar(0xFF);
ypos = 0;
isDirty = false;
namedWindow(WINDOWNAME, CV_WINDOW_AUTOSIZE);
}
OpenCVPrinter::~OpenCVPrinter()
{
delete pixels; pixels = NULL;
}
void OpenCVPrinter::update()
{
if (isDirty) {
imshow(WINDOWNAME, *pixels);
isDirty = false;
}
}
void OpenCVPrinter::addLine(uint8_t *rowOfBits)
{
isDirty = true;
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for (int yoff=0; yoff<9; yoff++) {
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// 960 pixels == 120 bytes -- FIXME
for (int i=0; i<(NATIVEWIDTH/8); i++) {
uint8_t bv = rowOfBits[yoff*120+i];
for (int xoff=0; xoff<8; xoff++) {
// scale X from "actual FX80" coordinates to "real printer" coordinates
uint16_t actualX = (uint16_t)(((float)(i*8+xoff) * (float)WIDTH) / (float)NATIVEWIDTH);
uint8_t oldPixel = pixels->at<uchar>((ypos + yoff)%HEIGHT, actualX);
uint8_t pixelColor = (bv & (1 << (7-xoff))) ? 0x00 : 0xFF;
// Make sure to preserve any pixels we've already drawn
pixels->at<uchar>((ypos + yoff)%HEIGHT, actualX) = ~(~oldPixel | ~pixelColor);
}
}
}
if (ypos >= HEIGHT) {
ypos = 0;
}
}
void OpenCVPrinter::moveDownPixels(uint8_t p)
{
ypos+= p;
if (ypos >= HEIGHT) {
// clear page & restart
*pixels = cv::Scalar(0xFF);
ypos = 0;
}
}