void smImage::threshold(float _T)
{
float T = (_T*255)/getWindowWidth();
for( int x = 0; x< width; x++)
{
for(int y = 0; y<height; y++)
{
float grayValue = getPixel(x,y);
if(grayValue > T){
grayValue = 255;
}
else{
grayValue = 0;
}
grayValue = grayValue / 255; // convert from 0-255 to 0.0-1.0
po::setColor( poColor( grayValue, grayValue, grayValue) ); // set the color
po::drawFilledRect( x*5,y*5, 5, 5 ); // draw the "pixel" rectangle
}
}
}
void smImage::blackandwhite()
{
for( int x = 0; x< width; x++)
{
for(int y = 0; y<height; y++)
{
float grayValue = getPixel(x,y);
if(grayValue > 255/2){
grayValue = 255;
}
else
{
grayValue = 0;
}
grayValue = grayValue / 255; // convert from 0-255 to 0.0-1.0
po::setColor( poColor( grayValue, grayValue, grayValue) ); // set the color
po::drawFilledRect( x*5,y*5, 5, 5 ); // draw the "pixel" rectangle
}
}
}
poColor poImage::getPixel(poPoint p) const {
if(!isValid() || p.x < 0 || p.y < 0 || p.x >= getWidth() || p.y >=getHeight())
return poColor();
uint x = p.x;
uint y = p.y;
BYTE* bits = FreeImage_GetScanLine(bitmap, y);
poColor ret;
switch(getChannels()) {
case 1:
ret.set255(bits[x], bits[x], bits[x], 255);
break;
case 2:
ret.set255(bits[x*2], bits[x*2], bits[x*2], bits[x*2+1]);
break;
case 3:
ret.set255(bits[x*3+0], bits[x*3+1], bits[x*3+2], 255);
break;
case 4:
ret.set255(bits[x*4+0], bits[x*4+1], bits[x*4+2], bits[x*4+3]);
break;
default:
;
}
return ret;
}
// APP CONSTRUCTOR. Create all objects here.
MovingImageApp::MovingImageApp() {
addModifier(new poCamera2D(poColor(.9,.9,.9)));
sprite = new MovingImage("sprites/shifty/", "PT_Shifty");
sprite->setFrameRate(30);
sprite->position.set(100,100,0);
addChild(sprite);
control = new poControlPanel("controls", poColor( 0,.1,.1,.8 ), 9);
control->addSliderI("framerate", 1, 60, this);
control->addButton("play", this);
control->addButton("pause", this);
control->addButton("reset", this);
control->addButton("stop", this);
control->addButton("step forward", this);
control->addButton("step backward", this);
control->addToggle("loop", this);
control->addSliderI("goto frame", 0, sprite->getNumFrames()-1, this);
addChild(control);
addEvent(PO_KEY_DOWN_EVENT, this);
}
void smImage::draw()
{
// this is an inefficent, but simple mode of drawing an image
// we draw one rectangle for every pixel
// use the fastDraw() method if you want something faster
for( int x=0; x<width; x++ )
{
for( int y=0; y<height; y++ )
{
float grayValue = getPixel(x,y); // get the gray value
grayValue = grayValue / 255; // convert from 0-255 to 0.0-1.0
po::setColor( poColor( grayValue, grayValue, grayValue) ); // set the color
po::drawFilledRect( x*5,y*5, 5, 5 ); // draw the "pixel" rectangle
}
}
}
void smImage::edgeDetect(float _T)
{
float T = (_T*255)/getWindowWidth();
for( int x = 0; x< width; x++)
{
for(int y = 0; y<height; y++)
{
int index = x +y*width;
int nextIndex = index+1;
if(nextIndex == width*height){
nextIndex = 0;
}
float grayValue = getPixel(x,y);
if(abs(imageData[index]-imageData[nextIndex]) > T)
{
grayValue = 0;
}
else{
grayValue = 255;
}
grayValue = grayValue / 255; // convert from 0-255 to 0.0-1.0
po::setColor( poColor( grayValue, grayValue, grayValue) ); // set the color
po::drawFilledRect( x*5,y*5, 5, 5 ); // draw the "pixel" rectangle
}
}
}
void po::setColor(poColor color, float alpha) {
poOpenGLState::get()->color = poColor(color, alpha);
}
