475 lines
14 KiB
C++
475 lines
14 KiB
C++
/*
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* This file is part of RawTherapee.
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*
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* Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
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*
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* RawTherapee is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* RawTherapee is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <histogrampanel.h>
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#include <multilangmgr.h>
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#include <string.h>
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HistogramPanel::HistogramPanel () {
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histogramArea = Gtk::manage (new HistogramArea ());
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showRed = Gtk::manage (new Gtk::ToggleButton (M("HISTOGRAM_BUTTON_R")));
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showGreen = Gtk::manage (new Gtk::ToggleButton (M("HISTOGRAM_BUTTON_G")));
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showBlue = Gtk::manage (new Gtk::ToggleButton (M("HISTOGRAM_BUTTON_B")));
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showValue = Gtk::manage (new Gtk::ToggleButton (M("HISTOGRAM_BUTTON_L")));
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Gtk::VBox* vbox = Gtk::manage (new Gtk::VBox (false, 0));
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showRed->set_active (true);
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showGreen->set_active (true);
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showBlue->set_active (true);
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showValue->set_active (true);
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vbox->pack_start (*showRed, Gtk::PACK_SHRINK, 2);
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vbox->pack_start (*showGreen, Gtk::PACK_SHRINK, 2);
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vbox->pack_start (*showBlue, Gtk::PACK_SHRINK, 2);
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vbox->pack_start (*showValue, Gtk::PACK_SHRINK, 2);
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pack_start (*histogramArea);
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pack_end (*vbox, Gtk::PACK_SHRINK, 2);
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showRed->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::rgbv_toggled) );
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showGreen->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::rgbv_toggled) );
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showBlue->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::rgbv_toggled) );
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showValue->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::rgbv_toggled) );
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show_all ();
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showRed->set_tooltip_text (M("HISTOGRAM_TOOLTIP_R"));
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showGreen->set_tooltip_text (M("HISTOGRAM_TOOLTIP_G"));
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showBlue->set_tooltip_text (M("HISTOGRAM_TOOLTIP_B"));
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showValue->set_tooltip_text (M("HISTOGRAM_TOOLTIP_L"));
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rconn = signal_size_allocate().connect( sigc::mem_fun(*this, &HistogramPanel::resized) );
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}
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void HistogramPanel::resized (Gtk::Allocation& req) {
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rconn.block (true);
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if (req.get_width()/2>150)
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set_size_request (req.get_width(), 150);
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else
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set_size_request (req.get_width(), req.get_width()/2);
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rconn.block (false);
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histogramArea->renderHistogram ();
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histogramArea->queue_draw ();
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}
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void HistogramPanel::rgbv_toggled () {
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histogramArea->updateOptions (showRed->get_active(), showGreen->get_active(), showBlue->get_active(), showValue->get_active());
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histogramArea->queue_draw ();
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}
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HistogramArea::HistogramArea () :
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valid(false), showFull(true), oldwidth(-1), needVal(true), needRed(true), needGreen(true), needBlue(true) {
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haih = new HistogramAreaIdleHelper;
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haih->harea = this;
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haih->destroyed = false;
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haih->pending = 0;
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signal_style_changed().connect( sigc::mem_fun(*this, &HistogramArea::styleChanged) );
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}
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HistogramArea::~HistogramArea () {
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if (haih->pending)
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haih->destroyed = true;
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else
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delete haih;
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}
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void HistogramArea::updateOptions (bool r, bool g, bool b, bool v) {
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needRed = r;
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needGreen = g;
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needBlue = b;
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needVal = v;
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renderHistogram ();
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}
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int histupdate (void* data) {
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gdk_threads_enter ();
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HistogramAreaIdleHelper* haih = (HistogramAreaIdleHelper*)data;
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if (haih->destroyed) {
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if (haih->pending == 1)
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delete haih;
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else
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haih->pending--;
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gdk_threads_leave ();
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return 0;
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}
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haih->harea->renderHistogram ();
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haih->harea->queue_draw ();
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haih->pending--;
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gdk_threads_leave ();
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return 0;
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}
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void HistogramArea::update (unsigned int* rh, unsigned int* gh, unsigned int* bh, unsigned int* lh) {
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if (rh!=NULL) {
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memcpy (lhist, lh, 256*sizeof(unsigned int));
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memcpy (rhist, rh, 256*sizeof(unsigned int));
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memcpy (ghist, gh, 256*sizeof(unsigned int));
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memcpy (bhist, bh, 256*sizeof(unsigned int));
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valid = true;
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}
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else
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valid = false;
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haih->pending++;
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g_idle_add (histupdate, haih);
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}
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void HistogramArea::renderHistogram () {
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if (!is_realized ())
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return;
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Glib::RefPtr<Gdk::Window> window = get_window();
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int winx, winy, winw, winh, wind;
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window->get_geometry(winx, winy, winw, winh, wind);
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backBuffer = Gdk::Pixmap::create (window, winw, winh, -1);
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Glib::RefPtr<Gdk::GC> bgc = Gdk::GC::create(backBuffer);
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bgc->set_foreground (white);
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backBuffer->draw_rectangle (bgc, true, 0, 0, winw, winh);
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if (valid) {
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// compute height of the full histogram (realheight) and
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// does not take into account 0 and 255 values
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// them are handled separately
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int fullhistheight = 0;
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for (int i=1; i<255; i++) {
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if (needVal && lhist[i]>fullhistheight)
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fullhistheight = lhist[i];
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if (needRed && rhist[i]>fullhistheight)
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fullhistheight = rhist[i];
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if (needGreen && ghist[i]>fullhistheight)
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fullhistheight = ghist[i];
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if (needBlue && bhist[i]>fullhistheight)
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fullhistheight = bhist[i];
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}
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int realhistheight = fullhistheight;
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if (!showFull) {
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int area1thres = 0;
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int area2thres = 0;
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int area = 0;
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for (int i=0; i<fullhistheight; i++) {
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for (int j=0; j<256; j++)
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if ((needVal && lhist[j]>i) || (needRed && rhist[j]>i) || (needGreen && ghist[j]>i) || (needBlue && bhist[j]>i))
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area++;
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if (area1thres==0 && (double)area / (256*(i+1)) < 0.3)
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area1thres = i;
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if (area2thres==0 && (double)area / (256*(i+1)) < 0.3)
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area2thres = i;
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if (area1thres && area2thres)
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break;
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}
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if (area1thres>0 && area2thres>0 && area1thres<fullhistheight)
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realhistheight = area2thres;
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}
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if (realhistheight<winh-2)
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realhistheight = winh-2;
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Cairo::RefPtr<Cairo::Context> cr = backBuffer->create_cairo_context();
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cr->set_antialias (Cairo::ANTIALIAS_SUBPIXEL);
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cr->set_line_width (1.0);
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int ui = 0, oi = 0;
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if (needVal) {
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drawCurve(cr, lhist, realhistheight, winw, winh);
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cr->set_source_rgb (0.75, 0.75, 0.75);
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cr->fill_preserve ();
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cr->set_source_rgb (0.5, 0.5, 0.5);
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cr->stroke ();
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drawMarks(cr, lhist, realhistheight, winw, ui, oi);
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}
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if (needRed) {
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drawCurve(cr, rhist, realhistheight, winw, winh);
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cr->set_source_rgb (1.0, 0.0, 0.0);
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cr->stroke ();
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drawMarks(cr, rhist, realhistheight, winw, ui, oi);
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}
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if (needGreen) {
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drawCurve(cr, ghist, realhistheight, winw, winh);
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cr->set_source_rgb (0.0, 1.0, 0.0);
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cr->stroke ();
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drawMarks(cr, ghist, realhistheight, winw, ui, oi);
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}
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if (needBlue) {
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drawCurve(cr, bhist, realhistheight, winw, winh);
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cr->set_source_rgb (0.0, 0.0, 1.0);
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cr->stroke ();
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drawMarks(cr, bhist, realhistheight, winw, ui, oi);
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}
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}
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/*
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// scale histogram to width winw-1
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int* vval = new int[winw-1];
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int* vred = new int[winw-1];
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int* vgreen = new int[winw-1];
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int* vblue = new int[winw-1];
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memset (vval, 0, sizeof(int)*(winw-1));
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memset (vred, 0, sizeof(int)*(winw-1));
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memset (vgreen, 0, sizeof(int)*(winw-1));
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memset (vblue, 0, sizeof(int)*(winw-1));
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int index = 0;
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double scale = 256.0 / (winw-2);
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for (int i=0; i<=winw-2; i++) {
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int samples = 0;
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while (index < 256 && (int)(index/scale) == i) {
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vval[i] += lhist[index];
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vred[i] += rhist[index];
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vgreen[i] += ghist[index];
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vblue[i] += bhist[index];
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index++;
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samples++;
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}
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if (samples>0) {
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vval[i] /= samples;
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vred[i] /= samples;
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vgreen[i] /= samples;
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vblue[i] /= samples;
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}
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}
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// compute height of the full histogram (realheight) and
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int fullhistheight = 0;
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for (int i=0; i<=winw-2; i++) {
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if (needVal && vval[i]>fullhistheight)
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fullhistheight = vval[i];
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if (needRed && vred[i]>fullhistheight)
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fullhistheight = vred[i];
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if (needGreen && vgreen[i]>fullhistheight)
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fullhistheight = vgreen[i];
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if (needBlue && vblue[i]>fullhistheight)
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fullhistheight = vblue[i];
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}
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// compute two hights, one for the magnified view and one for the threshold
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int realhistheight = fullhistheight;
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if (!showFull) {
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int area1thres = 0;
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int area2thres = 0;
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int area = 0;
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for (int i=0; i<fullhistheight; i++) {
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for (int j=0; j<winw-1; j++)
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if ((needVal && vval[j]>i) || (needRed && vred[j]>i) || (needGreen && vgreen[j]>i) || (needBlue && vblue[j]>i))
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area++;
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if (area1thres==0 && (double)area / ((winw-1)*(i+1)) < 0.3)
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area1thres = i;
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if (area2thres==0 && (double)area / ((winw-1)*(i+1)) < 0.3)
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area2thres = i;
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if (area1thres && area2thres)
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break;
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}
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if (area1thres>0 && area2thres>0 && area1thres<fullhistheight)
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realhistheight = area2thres;
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}
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if (realhistheight<winh-2)
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realhistheight = winh-2;
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Cairo::RefPtr<Cairo::Context> cr = backBuffer->create_cairo_context();
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cr->set_antialias (Cairo::ANTIALIAS_SUBPIXEL);
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cr->set_line_width (1.0);
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if (needVal) {
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cr->move_to (0, winh-1);
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cr->set_source_rgb (0.75, 0.75, 0.75);
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for (int i=0; i<=winw-2; i++) {
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int val = (int)(vval[i] * (double)(winh-2) / realhistheight);
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if (val>winh-1)
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val = winh-1;
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if (i>0)
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cr->line_to (i+1, winh-1-val);
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}
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cr->fill_preserve ();
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cr->set_source_rgb (0.5, 0.5, 0.5);
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cr->stroke ();
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}
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if (needRed) {
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cr->move_to (0, winh-1);
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cr->set_source_rgb (1.0, 0.0, 0.0);
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for (int i=0; i<=winw-2; i++) {
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int val = (int)(vred[i] * (double)(winh-2) / realhistheight);
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if (val>winh-1)
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val = winh-1;
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if (i>0)
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cr->line_to (i+1, winh-1-val);
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}
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cr->stroke ();
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}
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if (needGreen) {
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cr->move_to (0, winh-1);
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cr->set_source_rgb (0.0, 1.0, 0.0);
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for (int i=0; i<=winw-2; i++) {
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int val = (int)(vgreen[i] * (double)(winh-2) / realhistheight);
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if (val>winh-1)
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val = winh-1;
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if (i>0)
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cr->line_to (i+1, winh-1-val);
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}
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cr->stroke ();
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}
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if (needBlue) {
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cr->move_to (0, winh-1);
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cr->set_source_rgb (0.0, 0.0, 1.0);
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for (int i=0; i<=winw-2; i++) {
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int val = (int)(vblue[i] * (double)(winh-2) / realhistheight);
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if (val>winh-1)
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val = winh-1;
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if (i>0)
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cr->line_to (i+1, winh-1-val);
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}
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cr->stroke ();
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}
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delete [] vval;
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delete [] vred;
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delete [] vgreen;
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delete [] vblue;
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}
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*/
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bgc->set_foreground (mgray);
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backBuffer->draw_rectangle (bgc, false, 0, 0, winw-1, winh-1);
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bgc->set_line_attributes (1, Gdk::LINE_ON_OFF_DASH, Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
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backBuffer->draw_line (bgc, winw/3, 0, winw/3, winh-1);
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backBuffer->draw_line (bgc, 2*winw/3, 0, 2*winw/3, winh-1);
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backBuffer->draw_line (bgc, 0, winh/3, winw-1, winh/3);
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backBuffer->draw_line (bgc, 0, 2*winh/3, winw-1, 2*winh/3);
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bgc->set_line_attributes (1, Gdk::LINE_SOLID, Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
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oldwidth = winw;
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oldheight = winh;
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}
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void HistogramArea::on_realize () {
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Gtk::DrawingArea::on_realize();
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Glib::RefPtr<Gdk::Window> window = get_window();
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gc_ = Gdk::GC::create(window);
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add_events(Gdk::EXPOSURE_MASK | Gdk::BUTTON_PRESS_MASK);
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Glib::RefPtr<Gdk::Colormap> colormap = get_default_colormap();
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black = Gdk::Color ("black");
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red = Gdk::Color ("red");
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green = Gdk::Color ("green");
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blue = Gdk::Color ("blue");
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lgray = Gdk::Color ("gray75");
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mgray = Gdk::Color ("gray50");
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dgray = Gdk::Color ("gray25");
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colormap->alloc_color(black);
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colormap->alloc_color(white);
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colormap->alloc_color(red);
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colormap->alloc_color(green);
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colormap->alloc_color(blue);
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colormap->alloc_color(lgray);
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colormap->alloc_color(mgray);
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colormap->alloc_color(dgray);
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}
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void HistogramArea::drawCurve(Cairo::RefPtr<Cairo::Context> &cr,
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unsigned int * data, double scale, int hsize, int vsize)
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{
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cr->move_to (0, vsize-1);
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for (int i = 0; i < 256; i++) {
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double val = data[i] * (double)(vsize-2) / scale;
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if (val > vsize - 1)
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val = vsize - 1;
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cr->line_to ((i/255.0)*(hsize - 1), vsize - 1 - val);
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}
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cr->line_to (hsize - 1, vsize - 1);
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}
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void HistogramArea::drawMarks(Cairo::RefPtr<Cairo::Context> &cr,
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unsigned int * data, double scale, int hsize, int & ui, int & oi)
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{
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int s = 8;
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if(data[0] > scale) {
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cr->rectangle(0, (ui++)*s, s, s);
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}
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if(data[255] > scale) {
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cr->rectangle(hsize - s, (oi++)*s, s, s);
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}
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cr->fill();
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}
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void HistogramArea::styleChanged (const Glib::RefPtr<Gtk::Style>& style) {
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white = get_style()->get_base(Gtk::STATE_NORMAL);
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queue_draw ();
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}
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bool HistogramArea::on_expose_event(GdkEventExpose* event) {
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Glib::RefPtr<Gdk::Window> window = get_window();
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int winx, winy, winw, winh, wind;
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window->get_geometry(winx, winy, winw, winh, wind);
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if (winw!=oldwidth && winh!=oldheight)
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renderHistogram ();
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window->draw_drawable (gc_, backBuffer, 0, 0, 0, 0, -1, -1);
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return true;
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}
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bool HistogramArea::on_button_press_event (GdkEventButton* event) {
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if (event->type==GDK_2BUTTON_PRESS && event->button==1) {
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showFull = !showFull;
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renderHistogram ();
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queue_draw ();
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}
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return true;
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}
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|
|