git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
568 lines
14 KiB
C++
568 lines
14 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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#define UINT_TO_RGB(u,r,g,b) { (*(r)) = ((u)>>16)&0xff; (*(g)) = ((u)>>8)&0xff; (*(b)) = (u)&0xff; }
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#define UINT_TO_RGBA(u,r,g,b,a) { UINT_TO_RGB(((u)>>8),r,g,b); (*(a)) = (u)&0xff; }
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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 = 10;
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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 = 10;
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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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int FastMeter::_clr0 = 0;
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int FastMeter::_clr1 = 0;
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int FastMeter::_clr2 = 0;
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int FastMeter::_clr3 = 0;
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FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o, int len, int clr0, int clr1, int clr2, int clr3)
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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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last_peak_rect.width = 0;
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last_peak_rect.height = 0;
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_clr0 = clr0;
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_clr1 = clr1;
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_clr2 = clr2;
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_clr3 = clr3;
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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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if (!len)
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len = 250;
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pixbuf = request_vertical_meter(dimen, len);
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} else {
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if (!len)
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len = 186;
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pixbuf = request_horizontal_meter(len, 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,r0,g0,b0,r1,g1,b1,r2,g2,b2,r3,g3,b3,a;
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UINT_TO_RGBA (_clr0, &r0, &g0, &b0, &a);
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UINT_TO_RGBA (_clr1, &r1, &g1, &b1, &a);
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UINT_TO_RGBA (_clr2, &r2, &g2, &b2, &a);
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UINT_TO_RGBA (_clr3, &r3, &g3, &b3, &a);
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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((float)abs(r1 - r0) * (float)y / (float)(knee/2));
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(r0 >= r1) ? r = r0 - r : r += r0;
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g = (guint8)floor((float)abs(g1 - g0) * (float)y / (float)(knee/2));
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(g0 >= g1) ? g = g0 - g : g += g0;
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b = (guint8)floor((float)abs(b1 - b0) * (float)y / (float)(knee/2));
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(b0 >= b1) ? b = b0 - b : b += b0;
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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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int offset = knee - y;
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for (int i=0; i < offset; i++,y++) {
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r = (guint8)floor((float)abs(r2 - r1) * (float)i / (float)offset);
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(r1 >= r2) ? r = r1 - r : r += r1;
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g = (guint8)floor((float)abs(g2 - g1) * (float)i / (float)offset);
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(g1 >= g2) ? g = g1 - g : g += g1;
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b = (guint8)floor((float)abs(b2 - b1) * (float)i / (float)offset);
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(b1 >= b2) ? b = b1 - b : b += b1;
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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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y--;
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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 ] = r3;
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data[ (x+(height-y-1)*width) * 3 + 1 ] = g3;
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data[ (x+(height-y-1)*width) * 3 + 2 ] = b3;
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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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/* reset the height & origin of the rect that needs to show the pixbuf
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*/
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pixrect.height = top_of_meter;
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pixrect.y = pixheight - 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, 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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if (hold_state) {
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last_peak_rect.x = 0;
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last_peak_rect.width = pixwidth;
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last_peak_rect.y = pixheight - (gint) floor (pixheight * current_peak);
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last_peak_rect.height = min(3, pixheight - last_peak_rect.y);
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get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), pixbuf,
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0, last_peak_rect.y,
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0, last_peak_rect.y,
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pixwidth, last_peak_rect.height,
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Gdk::RGB_DITHER_NONE, 0, 0);
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} else {
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last_peak_rect.width = 0;
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last_peak_rect.height = 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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pixrect.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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float old_level = current_level;
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float old_peak = current_peak;
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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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if (current_level == old_level && current_peak == old_peak && hold_state == 0) {
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return;
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}
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Glib::RefPtr<Gdk::Window> win;
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if ((win = get_window()) == 0) {
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queue_draw ();
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return;
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}
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if (orientation == Vertical) {
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queue_vertical_redraw (win, old_level);
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} else {
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queue_horizontal_redraw (win, old_level);
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}
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}
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void
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FastMeter::queue_vertical_redraw (const Glib::RefPtr<Gdk::Window>& win, float old_level)
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{
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GdkRectangle rect;
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gint new_top = (gint) floor (pixheight * current_level);
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rect.x = 0;
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rect.width = pixwidth;
|
|
rect.height = new_top;
|
|
rect.y = pixheight - new_top;
|
|
|
|
if (current_level > old_level) {
|
|
/* colored/pixbuf got larger, just draw the new section */
|
|
/* rect.y stays where it is because of X coordinates */
|
|
/* height of invalidated area is between new.y (smaller) and old.y
|
|
(larger).
|
|
X coordinates just make my brain hurt.
|
|
*/
|
|
rect.height = pixrect.y - rect.y;
|
|
} else {
|
|
/* it got smaller, compute the difference */
|
|
/* rect.y becomes old.y (the smaller value) */
|
|
rect.y = pixrect.y;
|
|
/* rect.height is the old.y (smaller) minus the new.y (larger)
|
|
*/
|
|
rect.height = pixrect.height - rect.height;
|
|
}
|
|
|
|
GdkRegion* region = 0;
|
|
bool queue = false;
|
|
|
|
if (rect.height != 0) {
|
|
|
|
/* ok, first region to draw ... */
|
|
|
|
region = gdk_region_rectangle (&rect);
|
|
queue = true;
|
|
}
|
|
|
|
/* redraw the last place where the last peak hold bar was;
|
|
the next expose will draw the new one whether its part of
|
|
expose region or not.
|
|
*/
|
|
|
|
if (last_peak_rect.width * last_peak_rect.height != 0) {
|
|
if (!queue) {
|
|
region = gdk_region_new ();
|
|
queue = true;
|
|
}
|
|
gdk_region_union_with_rect (region, &last_peak_rect);
|
|
}
|
|
|
|
if (queue) {
|
|
gdk_window_invalidate_region (win->gobj(), region, true);
|
|
}
|
|
if (region) {
|
|
gdk_region_destroy(region);
|
|
region = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
FastMeter::queue_horizontal_redraw (const Glib::RefPtr<Gdk::Window>& win, float old_level)
|
|
{
|
|
/* XXX OPTIMIZE (when we have some horizontal meters) */
|
|
queue_draw ();
|
|
}
|
|
|
|
void
|
|
FastMeter::clear ()
|
|
{
|
|
current_level = 0;
|
|
current_peak = 0;
|
|
hold_state = 0;
|
|
queue_draw ();
|
|
}
|