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rawTherapee/rtgui/histogrampanel.cc
jdc bf155fe5a9 Black and White mode issue2010
2013-11-13 20:00:54 +01:00

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/*
* This file is part of RawTherapee.
*
* Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
*
* RawTherapee is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* RawTherapee is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
*/
#include "histogrampanel.h"
#include "multilangmgr.h"
#include "guiutils.h"
#include "options.h"
#include <cstring>
#include "../rtengine/LUT.h"
#include "rtimage.h"
#include "../rtengine/improccoordinator.h"
extern Glib::ustring argv0;
extern Options options;
//
//
// HistogramPanel
HistogramPanel::HistogramPanel () {
histogramArea = Gtk::manage (new HistogramArea (this));
histogramRGBArea = Gtk::manage (new HistogramRGBArea ());
histogramRGBArea->show();
gfxVBox = Gtk::manage (new Gtk::VBox (false, 2));
histogramRGBArea->setParent(gfxVBox);
gfxVBox->pack_start (*histogramArea, Gtk::PACK_EXPAND_WIDGET, 0);
if (options.histogramBar)
gfxVBox->pack_start (*histogramRGBArea, Gtk::PACK_SHRINK, 0);
redImage = new RTImage ("histRed.png");
greenImage = new RTImage ("histGreen.png");
blueImage = new RTImage ("histBlue.png");
valueImage = new RTImage ("histValue.png");
chroImage = new RTImage ("histChro.png");
rawImage = new RTImage ("histRaw.png");
fullImage = new RTImage ("histFull.png");
barImage = new RTImage ("histBar.png");
redImage_g = new RTImage ("histRedg.png");
greenImage_g = new RTImage ("histGreeng.png");
blueImage_g = new RTImage ("histBlueg.png");
valueImage_g = new RTImage ("histValueg.png");
chroImage_g = new RTImage ("histChrog.png");
rawImage_g = new RTImage ("histRawg.png");
fullImage_g = new RTImage ("histFullg.png");
barImage_g = new RTImage ("histBarg.png");
showRed = Gtk::manage (new Gtk::ToggleButton ());
showGreen = Gtk::manage (new Gtk::ToggleButton ());
showBlue = Gtk::manage (new Gtk::ToggleButton ());
showValue = Gtk::manage (new Gtk::ToggleButton ());
showChro = Gtk::manage (new Gtk::ToggleButton ());
showRAW = Gtk::manage (new Gtk::ToggleButton ());
showFull = Gtk::manage (new Gtk::ToggleButton ());
showBAR = Gtk::manage (new Gtk::ToggleButton ());
showRed->set_name("histButton"); showRed->set_can_focus(false);
showGreen->set_name("histButton"); showGreen->set_can_focus(false);
showBlue->set_name("histButton"); showBlue->set_can_focus(false);
showValue->set_name("histButton"); showValue->set_can_focus(false);
showChro->set_name("histButton"); showChro->set_can_focus(false);
showRAW->set_name("histButton"); showRAW->set_can_focus(false);
showFull->set_name("fullButton"); showFull->set_can_focus(false);
showBAR->set_name("histButton"); showBAR->set_can_focus(false);
showRed->set_relief (Gtk::RELIEF_NONE);
showGreen->set_relief (Gtk::RELIEF_NONE);
showBlue->set_relief (Gtk::RELIEF_NONE);
showValue->set_relief (Gtk::RELIEF_NONE);
showChro->set_relief (Gtk::RELIEF_NONE);
showRAW->set_relief (Gtk::RELIEF_NONE);
showFull->set_relief (Gtk::RELIEF_NONE);
showBAR->set_relief (Gtk::RELIEF_NONE);
showRed->set_tooltip_text (M("HISTOGRAM_TOOLTIP_R"));
showGreen->set_tooltip_text (M("HISTOGRAM_TOOLTIP_G"));
showBlue->set_tooltip_text (M("HISTOGRAM_TOOLTIP_B"));
showValue->set_tooltip_text (M("HISTOGRAM_TOOLTIP_L"));
showChro->set_tooltip_text (M("HISTOGRAM_TOOLTIP_CHRO"));
showRAW->set_tooltip_text (M("HISTOGRAM_TOOLTIP_RAW"));
showFull->set_tooltip_text (M("HISTOGRAM_TOOLTIP_FULL"));
showBAR->set_tooltip_text (M("HISTOGRAM_TOOLTIP_BAR"));
buttonVBox = Gtk::manage (new Gtk::VBox (false, 2));
showRed->set_active (true);
showGreen->set_active (true);
showBlue->set_active (true);
showValue->set_active (true);
showChro->set_active (false);//unactive by default
showRAW->set_active (false);
showFull->set_active (!options.histogramFullMode);
showBAR->set_active (options.histogramBar);
showRed->set_image (showRed->get_active() ? *redImage : *redImage_g);
showGreen->set_image (showGreen->get_active() ? *greenImage : *greenImage_g);
showBlue->set_image (showBlue->get_active() ? *blueImage : *blueImage_g);
showValue->set_image (showValue->get_active() ? *valueImage : *valueImage_g);
showChro->set_image (showChro->get_active() ? *chroImage : *chroImage_g);
showRAW->set_image (showRAW->get_active() ? *rawImage : *rawImage_g);
showFull->set_image (showFull->get_active() ? *fullImage : *fullImage_g);
showBAR->set_image (showBAR->get_active() ? *barImage : *barImage_g);
showRed->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::red_toggled), showRed );
showGreen->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::green_toggled), showGreen );
showBlue->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::blue_toggled), showBlue );
showValue->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::value_toggled), showValue );
showChro->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::chro_toggled), showChro );
showRAW->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::raw_toggled), showRAW );
showFull->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::full_toggled), showFull );
showBAR->signal_toggled().connect( sigc::mem_fun(*this, &HistogramPanel::bar_toggled), showBAR );
buttonVBox->pack_start (*showRed, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showGreen, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showBlue, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showValue, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showChro, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showRAW, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showFull, Gtk::PACK_SHRINK, 0);
buttonVBox->pack_start (*showBAR, Gtk::PACK_SHRINK, 0);
// Put the button vbox next to the window's border to be less disturbing
if (options.histogramPosition == 1) {
pack_start (*buttonVBox, Gtk::PACK_SHRINK, 2);
pack_start (*gfxVBox,Gtk::PACK_EXPAND_WIDGET, 2);
}
else {
pack_start (*gfxVBox,Gtk::PACK_EXPAND_WIDGET, 2);
pack_start (*buttonVBox, Gtk::PACK_SHRINK, 2);
}
show_all ();
rconn = signal_size_allocate().connect( sigc::mem_fun(*this, &HistogramPanel::resized) );
}
HistogramPanel::~HistogramPanel () {
delete redImage;
delete greenImage;
delete blueImage;
delete valueImage;
delete chroImage;
delete rawImage;
delete fullImage;
delete barImage;
delete redImage_g;
delete greenImage_g;
delete blueImage_g;
delete valueImage_g;
delete chroImage_g;
delete rawImage_g;
delete fullImage_g;
delete barImage_g;
}
void HistogramPanel::resized (Gtk::Allocation& req) {
rconn.block (true);
int gHeight = req.get_width()/2;
if (gHeight > 150) gHeight = 150; else if (gHeight < 100) gHeight = 100;
int bHeight = req.get_width()/30;
if (bHeight > 10) bHeight = 10; else if (bHeight < 5 ) bHeight = 5;
histogramArea->set_size_request (req.get_width(), gHeight);
histogramRGBArea->set_size_request (req.get_width(), bHeight);
rconn.block (false);
histogramArea->renderHistogram ();
histogramArea->queue_draw ();
if (histogramRGBArea->getFreeze()==true) {
histogramRGBArea->updateFreeze(false);
// set histogramRGBArea invalid;
histogramRGBArea->renderRGBMarks(-1, -1, -1);
// re-set freeze to old state
histogramRGBArea->updateFreeze(true);
histogramRGBArea->queue_draw ();
}
else {
// set histogramRGBArea invalid;
histogramRGBArea->renderRGBMarks(-1, -1, -1);
histogramRGBArea->queue_draw ();
}
}
void HistogramPanel::red_toggled () {
showRed->set_image(showRed->get_active() ? *redImage : *redImage_g);
rgbv_toggled();
}
void HistogramPanel::green_toggled () {
showGreen->set_image(showGreen->get_active() ? *greenImage : *greenImage_g);
rgbv_toggled();
}
void HistogramPanel::blue_toggled () {
showBlue->set_image(showBlue->get_active() ? *blueImage : *blueImage_g);
rgbv_toggled();
}
void HistogramPanel::value_toggled () {
removeIfThere(showValue, valueImage, false);
removeIfThere(showValue, valueImage_g, false);
showValue->set_image(showValue->get_active() ? *valueImage : *valueImage_g);
rgbv_toggled();
}
void HistogramPanel::chro_toggled () {
removeIfThere(showChro, chroImage, false);
removeIfThere(showChro, chroImage_g, false);
showChro->set_image(showChro->get_active() ? *chroImage : *chroImage_g);
rgbv_toggled();
}
void HistogramPanel::raw_toggled () {
if (showRAW->get_active()) {
showRAW->set_image(*rawImage);
showValue->set_sensitive(false);
showChro->set_sensitive(false);
}
else {
showRAW->set_image(*rawImage_g);
showValue->set_sensitive(true);
showChro->set_sensitive(true);
}
rgbv_toggled();
}
void HistogramPanel::full_toggled () {
options.histogramFullMode = !showFull->get_active();
showFull->set_image(showFull->get_active() ? *fullImage : *fullImage_g);
rgbv_toggled();
}
void HistogramPanel::bar_toggled () {
showBAR->set_image(showBAR->get_active() ? *barImage : *barImage_g);
rgbv_toggled();
}
void HistogramPanel::rgbv_toggled () {
// Update Display
histogramArea->updateOptions (showRed->get_active(), showGreen->get_active(), showBlue->get_active(), showValue->get_active(), showRAW->get_active(), showFull->get_active(), showChro->get_active());
histogramArea->queue_draw ();
histogramRGBArea->updateOptions (showRed->get_active(), showGreen->get_active(), showBlue->get_active(), showValue->get_active(), showRAW->get_active(), showBAR->get_active(), showChro->get_active());
histogramRGBArea->renderRGBMarks (0,0,0);
histogramArea->queue_draw ();
}
void HistogramPanel::setHistRGBInvalid () {
// do something to un-show vertical bars
histogramRGBArea->renderRGBMarks(-1, -1, -1);
histogramRGBArea->queue_draw ();
}
// "Freeze" is not a button, but a RMB-click, so this is not in the RGBV-Toggle method
void HistogramPanel::toggleFreeze () {
if (histogramRGBArea->getFreeze()==true) {
histogramRGBArea->updateFreeze(false);
}
else if (histogramRGBArea->getShow()==true) {
histogramRGBArea->updateFreeze(true);
}
return;
}
void HistogramPanel::pointerMoved (bool validPos, Glib::ustring profile, int x, int y, int r, int g, int b) {
if (!validPos) {
// do something to un-show vertical bars
histogramRGBArea->renderRGBMarks(-1, -1, -1);
histogramRGBArea->queue_draw ();
}
else {
// do something to show vertical bars
histogramRGBArea->renderRGBMarks(r, g, b);
histogramRGBArea->queue_draw ();
}
}
/*
* Move the vertical button bar to the right side
* only allowed values for align are Gtk::ALIGN_LEFT and Gtk::ALIGN_RIGHT
*/
void HistogramPanel::reorder (Gtk::AlignmentEnum align) {
if (align == Gtk::ALIGN_LEFT)
reorder_child(*buttonVBox, 0);
else
reorder_child(*buttonVBox, 1);
}
// FullModeListener interface:
void HistogramPanel::toggle_button_full () {
showFull->set_active (!showFull->get_active ());
showFull->set_image(showFull->get_active() ? *fullImage : *fullImage_g);
}
//
//
//
// HistogramRGBArea
HistogramRGBArea::HistogramRGBArea () ://needChroma unactive by default
frozen(false), valid(false), needRed(true), needGreen(true), needBlue(true), needLuma(true), rawMode(false), showMode(options.histogramBar), barDisplayed(options.histogramBar), needChroma(false){
harih = new HistogramRGBAreaIdleHelper;
harih->harea = this;
harih->destroyed = false;
harih->pending = 0;
signal_style_changed().connect( sigc::mem_fun(*this, &HistogramRGBArea::styleChanged) );
}
HistogramRGBArea::~HistogramRGBArea () {
if (harih->pending)
harih->destroyed = true;
else
delete harih;
}
bool HistogramRGBArea::getFreeze() {
return(frozen);
}
bool HistogramRGBArea::getShow() {
return(showMode);
}
void HistogramRGBArea::updateFreeze (bool f) {
frozen = f;
return;
}
void HistogramRGBArea::renderRGBMarks (int r, int g, int b) {
if (!is_realized ())
return;
if (frozen) {
return;
}
// Mostly not necessary, but should be in some case
GThreadLock lock; // All GUI acces from idle_add callbacks or separate thread HAVE to be protected
Glib::RefPtr<Gdk::Window> window = get_window();
int winx, winy, winw, winh, wind;
window->get_geometry(winx, winy, winw, winh, wind);
overlay = Gdk::Pixmap::create (window, winw, winh, -1);
Glib::RefPtr<Gdk::GC> ovrl = Gdk::GC::create(overlay);
Glib::RefPtr<Gtk::Style> style = get_style ();
if (!showMode) {
ovrl->set_foreground (style->get_bg (Gtk::STATE_NORMAL));
overlay->draw_rectangle (ovrl, true, 0, 0, winw, winh);
if (rgbgc_ && overlay) {
window->draw_drawable (rgbgc_, overlay, 0, 0, 0, 0, -1, -1); }
return; }
else {
ovrl->set_foreground (mgray);
overlay->draw_rectangle (ovrl, true, 0, 0, winw, winh);
if (rgbgc_ && overlay) {
window->draw_drawable (rgbgc_, overlay, 0, 0, 0, 0, -1, -1); }
}
Cairo::RefPtr<Cairo::Context> cr = overlay->create_cairo_context();
cr->set_line_width (1.0);
if ( r != -1 && g != -1 && b != -1 ) {
if (needRed) {
// Red
cr->set_source_rgb(1.0, 0.0, 0.0);
cr->move_to((int)(r*(winw/256.0)), 0);
cr->line_to((int)(r*(winw/256.0)), winh-0);
cr->stroke();
}
if (needGreen) {
// Green
cr->set_source_rgb(0.0, 1.0, 0.0);
cr->move_to((int)(g*(winw/256.0)), 0);
cr->line_to((int)(g*(winw/256.0)), winh-0);
cr->stroke();
}
if (needBlue) {
// Blue
cr->set_source_rgb(0.0, 0.0, 1.0);
cr->move_to((int)(b*(winw/256.0)), 0);
cr->line_to((int)(b*(winw/256.0)), winh-0);
cr->stroke();
}
if (needLuma) {
// Luma
cr->set_source_rgb(1.0, 1.0, 1.0);
cr->move_to((int)((r+g+b)/3*(winw/256.0)), 0);
cr->line_to((int)((r+g+b)/3*(winw/256.0)), winh-0);
cr->stroke();
}
if (needChroma) {
// Luma
cr->set_source_rgb(1.0, 1.0, 1.0);
cr->move_to((int)((r+g+b)/3*(winw/256.0)), 0);
cr->line_to((int)((r+g+b)/3*(winw/256.0)), winh-0);
cr->stroke();
}
}
}
int histrgbupdate (void* data) {
HistogramRGBAreaIdleHelper* harih = static_cast<HistogramRGBAreaIdleHelper*>(data);
if (harih->destroyed) {
if (harih->pending == 1)
delete harih;
else
harih->pending--;
return 0;
}
harih->harea->renderRGBMarks(-1,-1,-1);
harih->harea->queue_draw ();
harih->pending--;
return 0;
}
void HistogramRGBArea::update (int valh, int rh, int gh, int bh) {
if (valh) {
val=valh;
r=rh;
g=gh;
b=bh;
valid = true;
}
else
valid = false;
harih->pending++;
g_idle_add (histrgbupdate, harih);
}
void HistogramRGBArea::updateOptions (bool r, bool g, bool b, bool l, bool raw, bool bar, bool c) {
needRed = r;
needGreen = g;
needBlue = b;
needLuma = l;
rawMode = raw;
showMode = bar;
needChroma = c;
// Histogram RGB BAR button logic goes here
if (bar && !barDisplayed) {
// Toggled on, add (show) the widget
parent->pack_start(*this, Gtk::PACK_SHRINK, 0);
options.histogramBar = true;
barDisplayed = true;
}
else if (!bar && barDisplayed){
// Toggled off, remove (hide) the widget
removeIfThere(parent, this, false);
options.histogramBar = false;
barDisplayed = false;
// unfreeze
updateFreeze(false);
}
// Disable (but don't hide it) the bar button when RAW histogram is displayed
if (rawMode) {
showMode = false;
}
}
void HistogramRGBArea::on_realize () {
Gtk::DrawingArea::on_realize();
Glib::RefPtr<Gdk::Window> window = get_window();
rgbgc_ = Gdk::GC::create(window);
add_events(Gdk::EXPOSURE_MASK | Gdk::BUTTON_PRESS_MASK);
Glib::RefPtr<Gdk::Colormap> rgbcolormap = get_default_colormap();
black = Gdk::Color ("black");
red = Gdk::Color ("red");
green = Gdk::Color ("green");
blue = Gdk::Color ("blue");
lgray = Gdk::Color ("gray75");
mgray = Gdk::Color ("gray50");
dgray = Gdk::Color ("gray25");
rgbcolormap->alloc_color(black);
rgbcolormap->alloc_color(white);
rgbcolormap->alloc_color(red);
rgbcolormap->alloc_color(green);
rgbcolormap->alloc_color(blue);
rgbcolormap->alloc_color(lgray);
rgbcolormap->alloc_color(mgray);
rgbcolormap->alloc_color(dgray);
}
bool HistogramRGBArea::on_expose_event(GdkEventExpose* event) {
Glib::RefPtr<Gdk::Window> window = get_window();
// on_realize & RenderRGBMarks have to be called before
if (rgbgc_ && overlay) {
window->draw_drawable (rgbgc_, overlay, 0, 0, 0, 0, -1, -1);
}
return true;
}
bool HistogramRGBArea::on_button_press_event (GdkEventButton* event) {
if (event->type==GDK_2BUTTON_PRESS && event->button==1) {
// do something. Maybe un-freeze ?
}
return true;
}
void HistogramRGBArea::styleChanged (const Glib::RefPtr<Gtk::Style>& style) {
white = get_style()->get_base(Gtk::STATE_NORMAL);
queue_draw ();
}
//
//
//
// HistogramArea
HistogramArea::HistogramArea (FullModeListener *fml) : //needChroma unactive by default
valid(false), fullMode(options.histogramFullMode), myFullModeListener(fml), oldwidth(-1), needLuma(true), needRed(true), needGreen(true), needBlue(true), rawMode(false), needChroma(false) {
lhist(256);
rhist(256);
ghist(256);
bhist(256);
chist(256);
haih = new HistogramAreaIdleHelper;
haih->harea = this;
haih->destroyed = false;
haih->pending = 0;
signal_style_changed().connect( sigc::mem_fun(*this, &HistogramArea::styleChanged) );
}
HistogramArea::~HistogramArea () {
if (haih->pending)
haih->destroyed = true;
else
delete haih;
}
void HistogramArea::updateOptions (bool r, bool g, bool b, bool l, bool raw, bool full, bool c) {
needRed = r;
needGreen = g;
needBlue = b;
needLuma = l;
rawMode = raw;
fullMode = !full;
needChroma = c;
renderHistogram ();
}
int histupdateUI (void* data) {
HistogramAreaIdleHelper* haih = static_cast<HistogramAreaIdleHelper*>(data);
if (haih->destroyed) {
if (haih->pending == 1)
delete haih;
else
haih->pending--;
return 0;
}
haih->harea->renderHistogram ();
haih->harea->queue_draw ();
haih->pending--;
return 0;
}
void HistogramArea::update (LUTu &histRed, LUTu &histGreen, LUTu &histBlue, LUTu &histLuma, LUTu &histRedRaw, LUTu &histGreenRaw, LUTu &histBlueRaw, LUTu &histChroma) {
if (histRed) {
lhist=histLuma;chist=histChroma;
rhist=histRed; ghist=histGreen; bhist=histBlue;
rhistRaw=histRedRaw; ghistRaw=histGreenRaw; bhistRaw=histBlueRaw;
valid = true;
}
else
valid = false;
haih->pending++;
// Can be done outside of the GUI thread
g_idle_add (histupdateUI, haih);
}
void HistogramArea::renderHistogram () {
if (!is_realized ())
return;
Glib::RefPtr<Gdk::Window> window = get_window();
int winx, winy, winw, winh, wind;
window->get_geometry(winx, winy, winw, winh, wind);
backBuffer = Gdk::Pixmap::create (window, winw, winh, -1);
Glib::RefPtr<Gdk::GC> bgc = Gdk::GC::create(backBuffer);
bgc->set_foreground (white);
backBuffer->draw_rectangle (bgc, true, 0, 0, winw, winh);
if (valid) {
// For RAW mode use the other hists
LUTu& rh = rawMode ? rhistRaw : rhist;
LUTu& gh = rawMode ? ghistRaw : ghist;
LUTu& bh = rawMode ? bhistRaw : bhist;
// compute height of the full histogram (realheight) and
// does not take into account 0 and 255 values
// them are handled separately
int fullhistheight = 0;
for (int i=1; i<255; i++) {
if (needLuma && lhist[i]>fullhistheight)
fullhistheight = lhist[i];
if (needChroma && chist[i]>fullhistheight)
fullhistheight = chist[i];
if (needRed && (rawMode?rhistRaw:rhist)[i]>fullhistheight)
fullhistheight = rh[i];
if (needGreen && (rawMode?ghistRaw:ghist)[i]>fullhistheight)
fullhistheight = gh[i];
if (needBlue && (rawMode?bhistRaw:bhist)[i]>fullhistheight)
fullhistheight = bh[i];
}
int realhistheight = fullhistheight;
if (!fullMode) {
int area = 0;
for (int i=0; i<fullhistheight; i++) {
for (int j=0; j<256; j++)
if ((needLuma && !rawMode && lhist[j]>i) || (needChroma && !rawMode && chist[j]>i) || (needRed && rh[j]>i) || (needGreen && gh[j]>i) || (needBlue && bh[j]>i))
area++;
if ((double)area / (256*(i+1)) < 0.3) {
realhistheight = i;
break;
}
}
}
if (realhistheight<winh-2)
realhistheight = winh-2;
Cairo::RefPtr<Cairo::Context> cr = backBuffer->create_cairo_context();
cr->set_antialias (Cairo::ANTIALIAS_SUBPIXEL);
cr->set_line_width (1.0);
int ui = 0, oi = 0;
if (needLuma && !rawMode) {
drawCurve(cr, lhist, realhistheight, winw, winh);
cr->set_source_rgb (0.75, 0.75, 0.75);
cr->fill_preserve ();
cr->set_source_rgb (0.5, 0.5, 0.5);
cr->stroke ();
drawMarks(cr, lhist, realhistheight, winw, ui, oi);
}
if (needChroma && !rawMode) {
drawCurve(cr, chist, realhistheight, winw, winh);
cr->set_source_rgb (0.6, 0.6, 0.6);
// cr->fill_preserve ();
// cr->set_source_rgb (0.2, 0.2, 0.1);
cr->stroke ();
drawMarks(cr, lhist, realhistheight, winw, ui, oi);
}
if (needRed) {
drawCurve(cr, rh, realhistheight, winw, winh);
cr->set_source_rgb (1.0, 0.0, 0.0);
cr->stroke ();
drawMarks(cr, rh, realhistheight, winw, ui, oi);
}
if (needGreen) {
drawCurve(cr, gh, realhistheight, winw, winh);
cr->set_source_rgb (0.0, 1.0, 0.0);
cr->stroke ();
drawMarks(cr, gh, realhistheight, winw, ui, oi);
}
if (needBlue) {
drawCurve(cr, bh, realhistheight, winw, winh);
cr->set_source_rgb (0.0, 0.0, 1.0);
cr->stroke ();
drawMarks(cr, bh, realhistheight, winw, ui, oi);
}
}
bgc->set_foreground (mgray);
backBuffer->draw_rectangle (bgc, false, 0, 0, winw-1, winh-1);
bgc->set_line_attributes (1, Gdk::LINE_ON_OFF_DASH, Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
backBuffer->draw_line (bgc, winw/4, 0, winw/4, winh);
backBuffer->draw_line (bgc, 2*winw/4, 0, 2*winw/4, winh);
backBuffer->draw_line (bgc, 3*winw/4, 0, 3*winw/4, winh);
backBuffer->draw_line (bgc, 0, winh/4, winw, winh/4);
backBuffer->draw_line (bgc, 0, 2*winh/4, winw, 2*winh/4);
backBuffer->draw_line (bgc, 0, 3*winh/4, winw, 3*winh/4);
bgc->set_line_attributes (1, Gdk::LINE_SOLID, Gdk::CAP_NOT_LAST, Gdk::JOIN_MITER);
oldwidth = winw;
oldheight = winh;
}
void HistogramArea::on_realize () {
Gtk::DrawingArea::on_realize();
Glib::RefPtr<Gdk::Window> window = get_window();
gc_ = Gdk::GC::create(window);
add_events(Gdk::EXPOSURE_MASK | Gdk::BUTTON_PRESS_MASK);
Glib::RefPtr<Gdk::Colormap> colormap = get_default_colormap();
black = Gdk::Color ("black");
red = Gdk::Color ("red");
green = Gdk::Color ("green");
blue = Gdk::Color ("blue");
lgray = Gdk::Color ("gray75");
mgray = Gdk::Color ("gray50");
dgray = Gdk::Color ("gray25");
colormap->alloc_color(black);
colormap->alloc_color(white);
colormap->alloc_color(red);
colormap->alloc_color(green);
colormap->alloc_color(blue);
colormap->alloc_color(lgray);
colormap->alloc_color(mgray);
colormap->alloc_color(dgray);
}
void HistogramArea::drawCurve(Cairo::RefPtr<Cairo::Context> &cr,
LUTu & data, double scale, int hsize, int vsize)
{
cr->move_to (0, vsize-1);
for (int i = 0; i < 256; i++) {
double val = data[i] * (double)(vsize-2) / scale;
if (val > vsize - 1)
val = vsize - 1;
cr->line_to ((i/255.0)*(hsize - 1), vsize - 1 - val);
}
cr->line_to (hsize - 1, vsize - 1);
}
void HistogramArea::drawMarks(Cairo::RefPtr<Cairo::Context> &cr,
LUTu & data, double scale, int hsize, int & ui, int & oi)
{
int s = 8;
if(data[0] > scale) {
cr->rectangle(0, (ui++)*s, s, s);
}
if(data[255] > scale) {
cr->rectangle(hsize - s, (oi++)*s, s, s);
}
cr->fill();
}
void HistogramArea::styleChanged (const Glib::RefPtr<Gtk::Style>& style) {
white = get_style()->get_base(Gtk::STATE_NORMAL);
queue_draw ();
}
bool HistogramArea::on_expose_event(GdkEventExpose* event) {
Glib::RefPtr<Gdk::Window> window = get_window();
int winx, winy, winw, winh, wind;
window->get_geometry(winx, winy, winw, winh, wind);
if (winw!=oldwidth && winh!=oldheight)
renderHistogram ();
window->draw_drawable (gc_, backBuffer, 0, 0, 0, 0, -1, -1);
return true;
}
bool HistogramArea::on_button_press_event (GdkEventButton* event) {
if (event->type==GDK_2BUTTON_PRESS && event->button==1) {
fullMode = !fullMode;
options.histogramFullMode = fullMode;
if (myFullModeListener)
myFullModeListener->toggle_button_full ();
renderHistogram ();
queue_draw ();
}
return true;
}
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