void FilterBrush::BrushMove(const Point source, const Point target)
{
ImpressionistDoc* pDoc = GetDocument();
ImpressionistUI* dlg = pDoc->m_pUI;
if (pDoc == NULL) {
printf("FilterBrush::BrushMove document is NULL\n");
return;
}
int size = pDoc->getSize();
double opacity = pDoc->getOpac();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if (isBlur){
glPointSize(2);
glBegin(GL_POINTS);
Blur(source, opacity);
glVertex2d(target.x, target.y);
glEnd();
}
else{
glPointSize(2);
glBegin(GL_POINTS);
Sharpen(source, opacity);
glVertex2d(target.x, target.y);
glEnd();
}
}
void PointBrush::BrushMove( const Point source, const Point target )
{
ImpressionistDoc* pDoc = GetDocument();
ImpressionistUI* dlg=pDoc->m_pUI;
if ( pDoc == NULL ) {
printf( "PointBrush::BrushMove document is NULL\n" );
return;
}
double opacity = pDoc->getOpac();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBegin( GL_POINTS );
glColor4f(0.5, 0.5, 0.5, opacity);
SetColorOpac(source, opacity);
glVertex2d( target.x, target.y );
glEnd();
}
void PointBrush::Auto(int startx, int endx, int starty,int endy, int w)
{
ImpressionistDoc* pDoc = GetDocument();
ImpressionistUI* dlg = pDoc->m_pUI;
int size = pDoc->getSize();
int spacing = pDoc->getSpacing();
double alpha = pDoc->getOpac();
glPointSize((float)size);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBegin(GL_POINTS);
for (int i = startx; i < endx + 1; i+=spacing){
for (int j = starty; j < endy + 1; j+=spacing){
SetColorOpac(Point(startx+i,endy-j),alpha);
glVertex2d(i,w-j);
}
}
glEnd();
}
void ScatteredLineBrush::BrushMove(const Point source, const Point target)
{
ImpressionistDoc* pDoc = GetDocument();
ImpressionistUI* dlg = pDoc->m_pUI;
if (pDoc == NULL) {
printf("LineBrush::BrushMove document is NULL\n");
return;
}
int size = pDoc->getSize();
int angle = pDoc->getAngle();
double opacity = pDoc->getOpac();
int strokeDirChoice = dlg->m_StrokeDirChoice->value();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
srand(time(0));
glMatrixMode(GL_MODELVIEW);
switch (strokeDirChoice){
// Slider/Right mouse
case 0:
// don't have to change size and angle value
for (int i = 0; i < 4; i++){
float length = fRand(1, size / 2)*2.5;
float dist = fRand(-size*0.3, size*0.3)*2.5;
float displacement = fRand(-size*0.75, size*0.75);
float x1 = target.x + displacement;
float y1 = target.y + dist;
glPushMatrix();
glTranslatef(x1, y1, 0.0);
glRotatef(angle, 0.0, 0.0, 1.0);
glTranslatef(-x1, -y1, 0.0);
glBegin(GL_LINE_STRIP);
SetColorOpac(Point(source.x + displacement, source.y + dist), opacity);
glVertex2d(x1 - length*0.75, y1);
glVertex2d(x1 + length*0.75, y1);
glEnd();
glPopMatrix();
}
break;
// Gradient
case 1:
// change angle value according to
// the gradient at this point
for (int i = 0; i < 4; i++){
float length = fRand(1, size / 2)*2.5;
float dist = fRand(-size*0.3, size*0.3)*2.5;
float displacement = fRand(-size*0.75, size*0.75);
float x1 = target.x + displacement;
float y1 = target.y + dist;
double Gx;
double Gy;
GLubyte color[3][3][3];
double intensity[3][3];
for (int i = -1; i < 2; i++){
for (int j = -1; j < 2; j++){
memcpy(color[i + 1][j + 1], pDoc->GetOriginalPixel(Point(source.x + displacement + i, source.y + dist + j)), 3);
intensity[i + 1][j + 1] = 0.299*color[i + 1][j + 1][0] + 0.587*color[i + 1][j + 1][1] + 0.144*color[i + 1][j + 1][2];
}
}
Gx = intensity[0][0] * (-1) + intensity[0][1] * (-2) + intensity[0][2] * (-1)\
+ intensity[2][0] * (1) + intensity[2][1] * (2) + intensity[2][2] * (1);
Gy = intensity[0][0] * (-1) + intensity[1][0] * (-2) + intensity[2][0] * (-1)\
+ intensity[0][2] * (1) + intensity[1][2] * (2) + intensity[2][2] * (1);
angle = -(int)(atan2(Gy, Gx)*57.32) % 360;
glPushMatrix();
glTranslatef(x1, y1, 0.0);
glRotatef(angle, 0.0, 0.0, 1.0);
glTranslatef(-x1, -y1, 0.0);
glBegin(GL_LINE_STRIP);
SetColorOpac(Point(source.x + displacement, source.y + dist), opacity);
glVertex2d(x1 - length*0.75, y1);
glVertex2d(x1 + length*0.75, y1);
glEnd();
glPopMatrix();
}
break;
// Brush direction
case 2:
current.x = target.x;
current.y = target.y;
if (prev.x!=-1&¤t.x!=-1&&(current.x != prev.x || current.y != prev.y)){
int dx = current.x - prev.x;
int dy = current.y - prev.y;
angle = (int)(atan2(dy, dx)*57.32) % 360;
for (int i = 0; i < 4; i++){
float length = size;
float dist = fRand(-size*0.3, size*0.3)*2.5;
float displacement = fRand(-size*0.75, size*0.75);
float x1 = target.x + displacement;
float y1 = target.y + dist;
glPushMatrix();
glTranslatef(x1, y1, 0.0);
glRotatef(angle, 0.0, 0.0, 1.0);
glTranslatef(-x1, -y1, 0.0);
glBegin(GL_LINE_STRIP);
SetColorOpac(Point(source.x + displacement, source.y + dist), opacity);
glVertex2d(x1 - length*0.75, y1);
glVertex2d(x1 + length*0.75, y1);
glEnd();
glPopMatrix();
}
}
prev.x = current.x;
prev.y = current.y;
break;
default:
break;
}
}