PointBrush.cpp

//
// PointBrush.cpp
//
// The implementation of Point Brush. It is a kind of ImpBrush. All your brush
// implementations will look like the file with the different GL primitive
// calls.
//

#include "pointbrush.h"
#include "gl_helper.h"
#include "impressionistDoc.h"
#include "impressionistUI.h"

using namespace GLHelper;

extern float frand();

PointBrush::PointBrush(ImpressionistDoc *pDoc, char *name)
    : ImpBrush(pDoc, name) {}

void PointBrush::BrushBegin(const Point source, const Point target, int rad, GLubyte* color) {
  ImpressionistDoc *pDoc = GetDocument();

  ImpressionistUI *dlg = pDoc->m_pUI;

  int size = (rad > 0)? rad : pDoc->getSize();

  glPointSize(size);

  BrushMove(source, target, color);
}

void PointBrush::BrushMove(const Point source, const Point target, GLubyte* color,
                           bool randomize) {
  ImpressionistDoc *pDoc = GetDocument();
  ImpressionistUI *dlg = pDoc->m_pUI;

  if (pDoc == NULL) {
    printf("PointBrush::BrushMove document is NULL\n");
    return;
  }
  pDoc->clip(source);
  pDoc->clip(target);
  if (source.x <= 0 || source.x >= pDoc->m_nPaintWidth || source.y <= 0 ||
      source.y >= pDoc->m_nPaintHeight) {
      return;
  }
  if (randomize == true && frand() > 0.5)
    RandomizeAttributes();

  gl_draw_shape(GL_POINTS, [&] {
    //debugger("%d, %d\n", target.x, target.y);
      if (color) {
          glColor4ubv(color);
    }
    else SetColor(source);
    gl_set_point(target);
  });

  pDoc->force_update_canvas();
}

void PointBrush::BrushEnd(const Point source, const Point target) {
  // do nothing so far
}

void PointBrush::RandomizeAttributes() { 
    ImpressionistDoc* pDoc = GetDocument();
    int size = pDoc->getSize();
    glPointSize(irand(size + 5)); 
}

void PointBrush::select() {
  ImpressionistDoc *pDoc = GetDocument();
  pDoc->m_pUI->m_BrushSizeSlider->activate();
  pDoc->m_pUI->m_BrushWidthSlider->deactivate();
  pDoc->m_pUI->m_BrushAngleSlider->deactivate();
  pDoc->m_pUI->m_StrokeDirection->deactivate();
  pDoc->m_pUI->m_BrushAlphaSlider->activate();
  pDoc->m_pUI->m_BrushBlurSlider->deactivate();
  pDoc->m_pUI->m_ColorBlending->activate();
  pDoc->m_pUI->m_MultiResPaint->activate();
  pDoc->m_pUI->m_BrushCurvatureSlider->deactivate();
}