441 lines
10 KiB
C++
441 lines
10 KiB
C++
/*
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Copyright (C) 2003-2006 Paul Davis
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <iostream>
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#include <cmath>
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#include <algorithm>
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#include <gdkmm/rectangle.h>
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#include <gtkmm2ext/fastmeter.h>
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#include <gtkmm2ext/utils.h>
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#include <gtkmm/style.h>
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#include <string.h>
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using namespace Gtk;
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using namespace Gdk;
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using namespace Glib;
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using namespace Gtkmm2ext;
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using namespace std;
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int FastMeter::min_v_pixbuf_size = 50;
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int FastMeter::max_v_pixbuf_size = 1024;
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Glib::RefPtr<Gdk::Pixbuf>* FastMeter::v_pixbuf_cache = 0;
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int FastMeter::min_h_pixbuf_size = 50;
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int FastMeter::max_h_pixbuf_size = 1024;
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Glib::RefPtr<Gdk::Pixbuf>* FastMeter::h_pixbuf_cache = 0;
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FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o)
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{
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orientation = o;
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hold_cnt = hold;
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hold_state = 0;
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current_peak = 0;
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current_level = 0;
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set_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK);
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pixrect.x = 0;
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pixrect.y = 0;
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if (orientation == Vertical) {
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pixbuf = request_vertical_meter(dimen, 250);
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} else {
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pixbuf = request_horizontal_meter(186, dimen);
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}
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pixheight = pixbuf->get_height();
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pixwidth = pixbuf->get_width();
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if (orientation == Vertical) {
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pixrect.width = min (pixwidth, (gint) dimen);
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pixrect.height = pixheight;
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} else {
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pixrect.width = pixwidth;
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pixrect.height = min (pixheight, (gint) dimen);
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}
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request_width = pixrect.width;
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request_height= pixrect.height;
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}
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Glib::RefPtr<Gdk::Pixbuf> FastMeter::request_vertical_meter(int width, int height)
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{
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if (height < min_v_pixbuf_size)
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height = min_v_pixbuf_size;
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if (height > max_v_pixbuf_size)
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height = max_v_pixbuf_size;
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int index = height - 1;
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if (v_pixbuf_cache == 0) {
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v_pixbuf_cache = (Glib::RefPtr<Gdk::Pixbuf>*) malloc(sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_v_pixbuf_size);
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memset(v_pixbuf_cache,0,sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_v_pixbuf_size);
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}
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Glib::RefPtr<Gdk::Pixbuf> ret = v_pixbuf_cache[index];
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if (ret)
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return ret;
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guint8* data;
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data = (guint8*) malloc(width*height * 3);
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guint8 r,g,b;
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r=0;
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g=255;
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b=0;
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// fake log calculation copied from log_meter.h
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// actual calculation:
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// log_meter(0.0f) =
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// def = (0.0f + 20.0f) * 2.5f + 50f
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// return def / 115.0f
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int knee = (int)floor((float)height * 100.0f / 115.0f);
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int y;
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for (y = 0; y < knee / 2; y++) {
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r = (guint8)floor(255.0 * (float)y/(float)(knee / 2));
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for (int x = 0; x < width; x++) {
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data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
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}
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}
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for (; y < knee; y++) {
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g = 255 - (guint8)floor(170.0 * (float)(y - knee/ 2)/(float)(knee / 2));
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for (int x = 0; x < width; x++) {
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data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
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}
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}
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r=255;
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g=0;
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b=0;
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for (; y < height; y++) {
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for (int x = 0; x < width; x++) {
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data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
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}
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}
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ret = Pixbuf::create_from_data(data, COLORSPACE_RGB, false, 8, width, height, width * 3);
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v_pixbuf_cache[index] = ret;
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return ret;
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}
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Glib::RefPtr<Gdk::Pixbuf> FastMeter::request_horizontal_meter(int width, int height)
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{
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if (width < min_h_pixbuf_size)
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width = min_h_pixbuf_size;
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if (width > max_h_pixbuf_size)
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width = max_h_pixbuf_size;
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int index = width - 1;
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if (h_pixbuf_cache == 0) {
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h_pixbuf_cache = (Glib::RefPtr<Gdk::Pixbuf>*) malloc(sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_h_pixbuf_size);
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memset(h_pixbuf_cache,0,sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_h_pixbuf_size);
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}
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Glib::RefPtr<Gdk::Pixbuf> ret = h_pixbuf_cache[index];
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if (ret)
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return ret;
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guint8* data;
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data = (guint8*) malloc(width*height * 3);
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guint8 r,g,b;
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r=0;
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g=255;
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b=0;
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// fake log calculation copied from log_meter.h
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// actual calculation:
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// log_meter(0.0f) =
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// def = (0.0f + 20.0f) * 2.5f + 50f
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// return def / 115.0f
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int knee = (int)floor((float)width * 100.0f / 115.0f);
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int x;
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for (x = 0; x < knee / 2; x++) {
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r = (guint8)floor(255.0 * (float)x/(float)(knee / 2));
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for (int y = 0; y < height; y++) {
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data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
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}
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}
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for (; x < knee; x++) {
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g = 255 - (guint8)floor(170.0 * (float)(x - knee/ 2)/(float)(knee / 2));
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for (int y = 0; y < height; y++) {
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data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
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}
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}
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r=255;
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g=0;
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b=0;
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for (; x < width; x++) {
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for (int y = 0; y < height; y++) {
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data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
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}
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}
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ret = Pixbuf::create_from_data(data, COLORSPACE_RGB, false, 8, width, height, width * 3);
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h_pixbuf_cache[index] = ret;
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return ret;
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}
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FastMeter::~FastMeter ()
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{
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}
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void
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FastMeter::set_hold_count (long val)
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{
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if (val < 1) {
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val = 1;
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}
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hold_cnt = val;
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hold_state = 0;
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current_peak = 0;
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queue_draw ();
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}
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void
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FastMeter::on_size_request (GtkRequisition* req)
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{
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if (orientation == Vertical) {
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req->height = request_height;
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req->height = max(req->height, min_v_pixbuf_size);
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req->height = min(req->height, max_v_pixbuf_size);
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req->width = request_width;
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} else {
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req->width = request_width;
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req->width = max(req->width, min_h_pixbuf_size);
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req->width = min(req->width, max_h_pixbuf_size);
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req->height = request_height;
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}
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}
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void
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FastMeter::on_size_allocate (Gtk::Allocation &alloc)
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{
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if (orientation == Vertical) {
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if (alloc.get_width() != request_width) {
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alloc.set_width (request_width);
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}
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int h = alloc.get_height();
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h = max(h, min_v_pixbuf_size);
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h = min(h, max_v_pixbuf_size);
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if ( h != alloc.get_height())
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alloc.set_height(h);
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if (pixheight != h) {
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pixbuf = request_vertical_meter(request_width, h);
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}
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} else {
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if (alloc.get_height() != request_height) {
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alloc.set_height(request_height);
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}
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int w = alloc.get_width();
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w = max(w, min_h_pixbuf_size);
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w = min(w, max_h_pixbuf_size);
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if ( w != alloc.get_width())
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alloc.set_width(w);
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if (pixwidth != w) {
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pixbuf = request_horizontal_meter(w, request_height);
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}
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}
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pixheight = pixbuf->get_height();
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pixwidth = pixbuf->get_width();
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DrawingArea::on_size_allocate(alloc);
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}
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bool
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FastMeter::on_expose_event (GdkEventExpose* ev)
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{
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if (orientation == Vertical) {
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return vertical_expose (ev);
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} else {
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return horizontal_expose (ev);
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}
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}
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bool
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FastMeter::vertical_expose (GdkEventExpose* ev)
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{
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gint top_of_meter;
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GdkRectangle intersection;
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GdkRectangle background;
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top_of_meter = (gint) floor (pixheight * current_level);
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pixrect.height = top_of_meter;
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background.x = 0;
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background.y = 0;
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background.width = pixrect.width;
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background.height = pixheight - top_of_meter;
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if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
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get_window()->draw_rectangle (get_style()->get_black_gc(), true,
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intersection.x, intersection.y,
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intersection.width, intersection.height);
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}
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if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
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// draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
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get_window()->draw_pixbuf(get_style()->get_fg_gc(get_state()), pixbuf,
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intersection.x, pixheight - top_of_meter,
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intersection.x, pixheight - top_of_meter,
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intersection.width, intersection.height,
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Gdk::RGB_DITHER_NONE, 0, 0);
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}
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// draw peak bar
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if (hold_state && intersection.width > 0) {
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gint y = pixheight - (gint) floor (pixheight * current_peak);
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int h = min(3, pixheight - y);
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get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), pixbuf,
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intersection.x, y,
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intersection.x, y,
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intersection.width, h,
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Gdk::RGB_DITHER_NONE, 0, 0);
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}
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return TRUE;
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}
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bool
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FastMeter::horizontal_expose (GdkEventExpose* ev)
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{
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gint right_of_meter;
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GdkRectangle intersection;
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GdkRectangle background;
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right_of_meter = (gint) floor (pixwidth * current_level);
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pixrect.width = right_of_meter;
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background.x = 0;
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background.y = 0;
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background.width = pixwidth - right_of_meter;
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background.height = pixrect.height;
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if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
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get_window()->draw_rectangle (get_style()->get_black_gc(), true,
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intersection.x + right_of_meter, intersection.y,
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intersection.width, intersection.height);
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}
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if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
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// draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
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get_window()->draw_pixbuf(get_style()->get_fg_gc(get_state()), pixbuf,
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intersection.x, intersection.y,
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intersection.x, intersection.y,
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intersection.width, intersection.height,
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Gdk::RGB_DITHER_NONE, 0, 0);
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}
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// draw peak bar
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// XXX: peaks don't work properly
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/*
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if (hold_state && intersection.height > 0) {
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gint x = (gint) floor(pixwidth * current_peak);
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get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), pixbuf,
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x, intersection.y,
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x, intersection.y,
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3, intersection.height,
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Gdk::RGB_DITHER_NONE, 0, 0);
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}
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*/
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return true;
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}
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void
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FastMeter::set (float lvl)
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{
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current_level = lvl;
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if (lvl > current_peak) {
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current_peak = lvl;
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hold_state = hold_cnt;
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}
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if (hold_state > 0) {
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if (--hold_state == 0) {
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current_peak = lvl;
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}
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}
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queue_draw ();
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}
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void
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FastMeter::clear ()
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{
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current_level = 0;
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current_peak = 0;
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hold_state = 0;
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queue_draw ();
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}
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