break out meter&metric pattern rendering.. first step towards new mixer-meters

1 files changed, 469 insertions, 0 deletions

diff --git a/gtk2_ardour/meter_patterns.cc b/gtk2_ardour/meter_patterns.cc
new file mode 100644
index 0000000000..f7e1226b13
--- /dev/null
+++ b/gtk2_ardour/meter_patterns.cc
@@ -0,0 +1,469 @@
+/*
+    Copyright (C) 2013 Paul Davis
+    Author: Robin Gareus
+
+    This program 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 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <gtkmm2ext/cairo_widget.h>
+#include <gtkmm2ext/gtk_ui.h>
+#include <gtkmm2ext/utils.h>
+#include <gtkmm2ext/rgb_macros.h>
+
+#include "ardour_ui.h"
+#include "utils.h"
+#include "logmeter.h"
+#include "meter_patterns.h"
+
+#include "i18n.h"
+
+using namespace ARDOUR;
+using namespace PBD;
+using namespace Gtk;
+using namespace Gtkmm2ext;
+using namespace std;
+
+
+static const int max_pattern_metric_size = 1026;
+
+cairo_pattern_t*
+meter_render_ticks (Gtk::Widget& w, vector<ARDOUR::DataType> types)
+{
+	Glib::RefPtr<Gdk::Window> win (w.get_window());
+
+	gint width, height;
+	win->get_size (width, height);
+
+	cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
+	cairo_t* cr = cairo_create (surface);
+
+	cairo_move_to (cr, 0, 0);
+	cairo_rectangle (cr, 0, 0, width, height);
+	{
+		Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
+		cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+	}
+	cairo_fill (cr);
+
+	height = min(max_pattern_metric_size, height);
+	uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
+
+	for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
+
+		Gdk::Color c;
+		c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
+
+		if (types.size() > 1) {
+			/* we're overlaying more than 1 set of marks, so use different colours */
+			switch (*i) {
+			case DataType::AUDIO:
+				c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
+				cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+				break;
+			case DataType::MIDI:
+				c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
+				cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+				break;
+			}
+		} else {
+			c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
+			cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+		}
+
+		std::map<int,float> points;
+
+		switch (*i) {
+		case DataType::AUDIO:
+			points.insert (std::pair<int,float>(-60, 0.5));
+			points.insert (std::pair<int,float>(-50, 0.5));
+			points.insert (std::pair<int,float>(-40, 0.5));
+			points.insert (std::pair<int,float>(-30, 0.5));
+			points.insert (std::pair<int,float>(-25, 0.5));
+			points.insert (std::pair<int,float>(-20, 1.0));
+
+			points.insert (std::pair<int,float>(-19, 0.5));
+			points.insert (std::pair<int,float>(-18, 1.0));
+			points.insert (std::pair<int,float>(-17, 0.5));
+			points.insert (std::pair<int,float>(-16, 0.5));
+			points.insert (std::pair<int,float>(-15, 1.0));
+
+			points.insert (std::pair<int,float>(-14, 0.5));
+			points.insert (std::pair<int,float>(-13, 0.5));
+			points.insert (std::pair<int,float>(-12, 0.5));
+			points.insert (std::pair<int,float>(-11, 0.5));
+			points.insert (std::pair<int,float>(-10, 1.0));
+
+			points.insert (std::pair<int,float>( -9, 0.5));
+			points.insert (std::pair<int,float>( -8, 0.5));
+			points.insert (std::pair<int,float>( -7, 0.5));
+			points.insert (std::pair<int,float>( -6, 0.5));
+			points.insert (std::pair<int,float>( -5, 1.0));
+			points.insert (std::pair<int,float>( -4, 0.5));
+			points.insert (std::pair<int,float>( -3, 0.5));
+			points.insert (std::pair<int,float>( -2, 0.5));
+			points.insert (std::pair<int,float>( -1, 0.5));
+
+			points.insert (std::pair<int,float>(  0, 1.0));
+			points.insert (std::pair<int,float>(  1, 0.5));
+			points.insert (std::pair<int,float>(  2, 0.5));
+			points.insert (std::pair<int,float>(  3, 0.5));
+			points.insert (std::pair<int,float>(  4, 0.5));
+			points.insert (std::pair<int,float>(  5, 0.5));
+			break;
+
+		case DataType::MIDI:
+			points.insert (std::pair<int,float>(  0, 1.0));
+			points.insert (std::pair<int,float>( 16, 0.5));
+			points.insert (std::pair<int,float>( 32, 0.5));
+			points.insert (std::pair<int,float>( 48, 0.5));
+			points.insert (std::pair<int,float>( 64, 1.0));
+			points.insert (std::pair<int,float>( 80, 0.5));
+			points.insert (std::pair<int,float>( 96, 0.5));
+			points.insert (std::pair<int,float>(100, 1.0));
+			points.insert (std::pair<int,float>(112, 0.5));
+			points.insert (std::pair<int,float>(127, 1.0));
+			break;
+		}
+
+		for (std::map<int,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
+			cairo_set_line_width (cr, (j->second));
+
+			float fraction = 0;
+			gint pos;
+
+			switch (*i) {
+			case DataType::AUDIO:
+				if (j->first >= 0 || j->first == -9) {
+					cairo_set_source_rgb (cr,
+							UINT_RGBA_R_FLT(peakcolor),
+							UINT_RGBA_G_FLT(peakcolor),
+							UINT_RGBA_B_FLT(peakcolor));
+				} else {
+					cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+				}
+				fraction = log_meter (j->first);
+				pos = height - (gint) floor (height * fraction);
+				cairo_move_to(cr, 0, pos + .5);
+				cairo_line_to(cr, 3, pos + .5);
+				cairo_stroke (cr);
+				break;
+			case DataType::MIDI:
+				fraction = (j->first) / 127.0;
+				pos = 1 + height - (gint) floor (height * fraction);
+				pos = min (pos, height);
+				cairo_arc(cr, 1.5, pos + .5, 1.0, 0, 2 * M_PI);
+				cairo_fill(cr);
+				break;
+			}
+		}
+	}
+
+	cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
+
+	cairo_destroy (cr);
+	cairo_surface_destroy (surface);
+
+	return pattern;
+}
+
+
+cairo_pattern_t*
+meter_render_metrics (Gtk::Widget& w, vector<DataType> types)
+{
+	Glib::RefPtr<Gdk::Window> win (w.get_window());
+
+	bool tickleft = true;
+	gint width, height;
+	win->get_size (width, height);
+
+	tickleft = w.get_name().substr(w.get_name().length() - 4) == "Left";
+
+	cairo_surface_t* surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
+	cairo_t* cr = cairo_create (surface);
+	Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(w.get_pango_context());
+
+	Pango::AttrList audio_font_attributes;
+	Pango::AttrList midi_font_attributes;
+	Pango::AttrList unit_font_attributes;
+
+	Pango::AttrFontDesc* font_attr;
+	Pango::FontDescription font;
+
+	font = Pango::FontDescription (""); // use defaults
+	//font = get_font_for_style("gain-fader");
+	//font = w.get_style()->get_font();
+
+	font.set_weight (Pango::WEIGHT_NORMAL);
+	font.set_size (9.0 * PANGO_SCALE);
+	font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
+	audio_font_attributes.change (*font_attr);
+	delete font_attr;
+
+	font.set_weight (Pango::WEIGHT_ULTRALIGHT);
+	font.set_stretch (Pango::STRETCH_ULTRA_CONDENSED);
+	font.set_size (7.5 * PANGO_SCALE);
+	font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
+	midi_font_attributes.change (*font_attr);
+	delete font_attr;
+
+	font.set_size (7.0 * PANGO_SCALE);
+	font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
+	unit_font_attributes.change (*font_attr);
+	delete font_attr;
+
+	cairo_move_to (cr, 0, 0);
+	cairo_rectangle (cr, 0, 0, width, height);
+	{
+		Gdk::Color c = w.get_style()->get_bg (Gtk::STATE_ACTIVE);
+		cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+	}
+	cairo_fill (cr);
+
+	height = min(max_pattern_metric_size, height);
+	uint32_t peakcolor = ARDOUR_UI::config()->color_by_name ("meterbridge peaklabel");
+
+	for (vector<DataType>::const_iterator i = types.begin(); i != types.end(); ++i) {
+
+		Gdk::Color c;
+
+		if (types.size() > 1) {
+			/* we're overlaying more than 1 set of marks, so use different colours */
+			Gdk::Color c;
+			switch (*i) {
+			case DataType::AUDIO:
+				c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
+				cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+				break;
+			case DataType::MIDI:
+				c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
+				cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+				break;
+			}
+		} else {
+			c = w.get_style()->get_fg (Gtk::STATE_NORMAL);
+			cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+		}
+
+		std::map<int,float> points;
+
+		switch (*i) {
+		case DataType::AUDIO:
+			layout->set_attributes (audio_font_attributes);
+			points.insert (std::pair<int,float>(-50, 0.5));
+			points.insert (std::pair<int,float>(-40, 0.5));
+			points.insert (std::pair<int,float>(-30, 0.5));
+			points.insert (std::pair<int,float>(-20, 1.0));
+			if (types.size() == 1) {
+				points.insert (std::pair<int,float>(-25, 0.5));
+				points.insert (std::pair<int,float>(-15, 1.0));
+			}
+			points.insert (std::pair<int,float>(-18, 1.0));
+			points.insert (std::pair<int,float>(-10, 1.0));
+			points.insert (std::pair<int,float>( -5, 1.0));
+			points.insert (std::pair<int,float>( -3, 0.5));
+			points.insert (std::pair<int,float>(  0, 1.0));
+			points.insert (std::pair<int,float>(  3, 0.5));
+			break;
+
+		case DataType::MIDI:
+			layout->set_attributes (midi_font_attributes);
+			points.insert (std::pair<int,float>(  0, 1.0));
+			if (types.size() == 1) {
+				points.insert (std::pair<int,float>( 16, 0.5));
+				points.insert (std::pair<int,float>( 32, 0.5));
+				points.insert (std::pair<int,float>( 48, 0.5));
+				points.insert (std::pair<int,float>( 64, 1.0));
+				points.insert (std::pair<int,float>( 80, 0.5));
+				points.insert (std::pair<int,float>( 96, 0.5));
+				points.insert (std::pair<int,float>(100, 0.5));
+				points.insert (std::pair<int,float>(112, 0.5));
+			} else {
+				/* labels that don't overlay with dB */
+				points.insert (std::pair<int,float>( 24, 0.5));
+				points.insert (std::pair<int,float>( 48, 0.5));
+				points.insert (std::pair<int,float>( 72, 0.5));
+			}
+			points.insert (std::pair<int,float>(127, 1.0));
+			break;
+		}
+
+		char buf[32];
+		gint pos;
+
+		for (std::map<int,float>::const_iterator j = points.begin(); j != points.end(); ++j) {
+
+			float fraction = 0;
+			switch (*i) {
+			case DataType::AUDIO:
+				cairo_set_line_width (cr, (j->second));
+				if (j->first >= 0) {
+					cairo_set_source_rgb (cr,
+							UINT_RGBA_R_FLT(peakcolor),
+							UINT_RGBA_G_FLT(peakcolor),
+							UINT_RGBA_B_FLT(peakcolor));
+				}
+				fraction = log_meter (j->first);
+				snprintf (buf, sizeof (buf), "%+2d", j->first);
+				pos = height - (gint) floor (height * fraction);
+				if (tickleft) {
+					cairo_move_to(cr, width-2.5, pos + .5);
+					cairo_line_to(cr, width, pos + .5);
+				} else {
+					cairo_move_to(cr, 0, pos + .5);
+					cairo_line_to(cr, 2.5, pos + .5);
+				}
+				cairo_stroke (cr);
+				break;
+			case DataType::MIDI:
+				cairo_set_line_width (cr, 1.0);
+				fraction = (j->first) / 127.0;
+				snprintf (buf, sizeof (buf), "%3d", j->first);
+				pos = 1 + height - (gint) rintf (height * fraction);
+				pos = min (pos, height);
+				if (tickleft) {
+					cairo_arc(cr, width - 2.0, pos + .5, 1.0, 0, 2 * M_PI);
+				} else {
+					cairo_arc(cr, 3, pos + .5, 1.0, 0, 2 * M_PI);
+				}
+				cairo_fill(cr);
+				break;
+			}
+
+			layout->set_text(buf);
+
+			/* we want logical extents, not ink extents here */
+
+			int tw, th;
+			layout->get_pixel_size(tw, th);
+
+			int p = pos - (th / 2);
+			p = min (p, height - th);
+			p = max (p, 0);
+
+			cairo_move_to (cr, width-4-tw, p);
+			pango_cairo_show_layout (cr, layout->gobj());
+		}
+	}
+
+	if (types.size() == 1) {
+		int tw, th;
+		layout->set_attributes (unit_font_attributes);
+		switch (types.at(0)) {
+			case DataType::AUDIO:
+				layout->set_text("dBFS");
+				layout->get_pixel_size(tw, th);
+				break;
+			case DataType::MIDI:
+				layout->set_text("vel");
+				layout->get_pixel_size(tw, th);
+				break;
+		}
+		Gdk::Color c = w.get_style()->get_fg (Gtk::STATE_ACTIVE);
+		cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
+		cairo_move_to (cr, 1, height - th - 1.5);
+		pango_cairo_show_layout (cr, layout->gobj());
+	}
+
+	cairo_pattern_t* pattern = cairo_pattern_create_for_surface (surface);
+
+	cairo_destroy (cr);
+	cairo_surface_destroy (surface);
+
+	return pattern;
+}
+
+
+typedef std::map<std::string,cairo_pattern_t*> TickPatterns;
+static  TickPatterns ticks_patterns;
+
+gint meter_expose_ticks (GdkEventExpose *ev, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mta)
+{
+	Glib::RefPtr<Gdk::Window> win (mta->get_window());
+	cairo_t* cr;
+
+	cr = gdk_cairo_create (win->gobj());
+
+	/* clip to expose area */
+
+	gdk_cairo_rectangle (cr, &ev->area);
+	cairo_clip (cr);
+
+	cairo_pattern_t* pattern;
+	TickPatterns::iterator i = ticks_patterns.find (mta->get_name());
+
+	if (i == ticks_patterns.end()) {
+		pattern = meter_render_ticks (*mta, types);
+		ticks_patterns[mta->get_name()] = pattern;
+	} else {
+		pattern = i->second;
+	}
+
+	cairo_move_to (cr, 0, 0);
+	cairo_set_source (cr, pattern);
+
+	gint width, height;
+	win->get_size (width, height);
+
+	cairo_rectangle (cr, 0, 0, width, height);
+	cairo_fill (cr);
+
+	cairo_destroy (cr);
+
+	return true;
+}
+
+typedef std::map<std::string,cairo_pattern_t*> MetricPatterns;
+static  MetricPatterns metric_patterns;
+
+gint meter_expose_metrics (GdkEventExpose *ev, std::vector<ARDOUR::DataType> types, Gtk::DrawingArea *mma)
+{
+	Glib::RefPtr<Gdk::Window> win (mma->get_window());
+	cairo_t* cr;
+
+	cr = gdk_cairo_create (win->gobj());
+
+	/* clip to expose area */
+
+	gdk_cairo_rectangle (cr, &ev->area);
+	cairo_clip (cr);
+
+	cairo_pattern_t* pattern;
+	MetricPatterns::iterator i = metric_patterns.find (mma->get_name());
+
+	if (i == metric_patterns.end()) {
+		pattern = meter_render_metrics (*mma, types);
+		metric_patterns[mma->get_name()] = pattern;
+	} else {
+		pattern = i->second;
+	}
+
+	cairo_move_to (cr, 0, 0);
+	cairo_set_source (cr, pattern);
+
+	gint width, height;
+	win->get_size (width, height);
+
+	cairo_rectangle (cr, 0, 0, width, height);
+	cairo_fill (cr);
+
+	cairo_destroy (cr);
+
+	return true;
+}
+
+void meter_clear_pattern_cache() {
+	metric_patterns.clear();
+	ticks_patterns.clear();
+}