void TupLuminancePicker::paintEvent(QPaintEvent *)
{
int w = width() - 5;
QRect r(0, foff, w, height() - 2*foff);
int wi = r.width() - 2;
int hi = r.height() - 2;
if (!k->pix || k->pix->height() != hi || k->pix->width() != wi) {
delete k->pix;
QImage img(wi, hi, QImage::Format_RGB32);
int y;
for (y = 0; y < hi; y++) {
QColor c;
c.setHsv(k->hue, k->sat, y2val(y+coff));
QRgb r = c.rgb();
int x;
for (x = 0; x < wi; x++)
img.setPixel(x, y, r);
}
k->pix = new QPixmap(QPixmap::fromImage(img));
}
QPainter p(this);
p.drawPixmap(1, coff, *k->pix);
const QPalette &g = palette();
qDrawShadePanel(&p, r, g, true);
p.setPen(g.foreground().color());
p.setBrush(g.foreground());
QPolygon a;
int y = val2y(k->value);
a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
p.eraseRect(w, 0, 5, height());
p.drawPolygon(a);
}
void ColorLuminancePicker::paintEvent(QPaintEvent* /*event*/) {
int w = width() - 5;
QRect r(0, foff, w, height() - 2*foff);
int wi = r.width() - 2;
int hi = r.height() - 2;
if (wi <= 1 || hi <= 1)
return;
if ((pix_ == 0) || (pix_->height() != hi) || (pix_->width() != wi)) {
if (!pix_)
delete pix_;
QImage img(wi, hi, QImage::Format_RGB32);
for (int y = 0 ; y < hi ; ++y) {
QColor c;
c.setHsv(hue_, sat_, y2val(y+coff));
QRgb r = c.rgb();
for (int x = 0 ; x < wi ; ++x)
img.setPixel(x, y, r);
}
pix_ = new QPixmap(QPixmap::fromImage(img));
}
// color bar
QPainter p(this);
p.drawPixmap(1, coff, *pix_);
const QPalette &g = palette();
qDrawShadePanel(&p, r, g, true);
p.setPen(g.foreground().color());
p.setBrush(g.foreground());
// arrow
QPolygon a;
int y = val2y(val_);
a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
p.eraseRect(w, 0, 5, height());
p.drawPolygon(a);
}
void YviColorLuminancePicker::paintEvent(QPaintEvent *)
{
int w = width() - 5;
QRect r(0, foff, w, height() - 2*foff);
int wi = r.width() - 2;
int hi = r.height() - 2;
if (!pix || pix->height() != hi || pix->width() != wi) {
delete pix;
QImage img(wi, hi, QImage::Format_RGB32);
int y;
uint *pixel = (uint *) img.scanLine(0);
for (y = 0; y < hi; y++) {
const uint *end = pixel + wi;
while (pixel < end) {
QColor c;
c.setHsv(hue, sat, y2val(y+coff));
*pixel = c.rgb();
++pixel;
}
}
pix = new QPixmap(QPixmap::fromImage(img));
}
QPainter p(this);
p.drawPixmap(1, coff, *pix);
const QPalette &g = palette();
qDrawShadePanel(&p, r, g, true);
p.setPen(g.foreground().color());
p.setBrush(g.foreground());
QPolygon a;
int y = val2y(val);
a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
p.eraseRect(w, 0, 5, height());
p.drawPolygon(a);
}
static gboolean
process (GeglOperation *operation,
GeglBuffer *input,
GeglBuffer *output,
const GeglRectangle *result,
gint level)
{
GeglProperties *o = GEGL_PROPERTIES (operation);
gint width = MAX(MAX (o->width, o->x0), o->x1);
gint height = MAX(MAX (o->height, o->y0), o->y1);
{
GeglRectangle extent = {0,0,width,height};
output = gegl_buffer_new (&extent, babl_format ("B'aG'aR'aA u8"));
}
{
guchar *buf = g_new0 (guchar, width * height * 4);
cairo_t *cr;
cairo_surface_t *surface = cairo_image_surface_create_for_data (buf, CAIRO_FORMAT_ARGB32, width, height, width * 4);
cr = cairo_create (surface);
/* cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
cairo_rectangle (cr, 0,0, o->width, o->height);
cairo_fill (cr);*/
#define val2y(val) (o->height - (val - o->min) * o->height / (o->max-o->min))
cairo_set_source_rgba (cr, .0, .0, .8, 0.5);
cairo_move_to (cr, 0, val2y(0.0));
cairo_line_to (cr, o->width, val2y(0.0));
cairo_set_source_rgba (cr, .8, .8, .0, 0.5);
cairo_move_to (cr, 0, val2y(1.0));
cairo_line_to (cr, o->width, val2y(1.0));
cairo_stroke (cr);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
{
gint x;
cairo_set_source_rgba (cr, 1.0, 0.0, 0.0, 1.0);
for (x=0;x<o->width;x++)
{
gfloat t = (1.0*x)/o->width;
gint sx = ((1.0-t) * o->x0) + (t * o->x1);
gint sy = ((1.0-t) * o->y0) + (t * o->y1);
cairo_line_to (cr, x, val2y(buffer_sample(input,sx,sy,0)));
}
cairo_stroke (cr);
}
{
gint x;
cairo_set_source_rgba (cr, 0.0, 1.0, 0.0, 1.0);
for (x=0;x<o->width;x++)
{
gfloat t = (1.0*x)/o->width;
gint sx = ((1.0-t) * o->x0) + (t * o->x1);
gint sy = ((1.0-t) * o->y0) + (t * o->y1);
cairo_line_to (cr, x, val2y(buffer_sample(input,sx,sy,1)));
}
cairo_stroke (cr);
}
{
gint x;
cairo_set_source_rgba (cr, 0.0, 0.0, 1.0, 1.0);
for (x=0;x<o->width;x++)
{
gfloat t = (1.0*x)/o->width;
gint sx = ((1.0-t) * o->x0) + (t * o->x1);
gint sy = ((1.0-t) * o->y0) + (t * o->y1);
cairo_line_to (cr, x, val2y(buffer_sample(input,sx,sy,2)));
}
cairo_stroke (cr);
}
cairo_set_source_rgba (cr, 1.0, 0.0, 0.0, 0.4);
cairo_move_to (cr, o->x0, o->y0);
cairo_line_to (cr, o->x1, o->y1);
cairo_stroke (cr);
gegl_buffer_set (output, NULL, 0, babl_format ("B'aG'aR'aA u8"), buf, GEGL_AUTO_ROWSTRIDE);
}
return TRUE;
}
