--- /dev/null
+/*
+ Copyright (C) 2003-2016 Paul Davis
+
+ 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.
+
+ $Id$
+*/
+
+#include <iostream>
+#include <cmath>
+#include <algorithm>
+#include <cstring>
+
+#include <stdlib.h>
+
+#include <glibmm.h>
+
+#include <gtkmm2ext/utils.h>
+
+#include "canvas/canvas.h"
+#include "meter.h"
+
+#define UINT_TO_RGB(u,r,g,b) { (*(r)) = ((u)>>16)&0xff; (*(g)) = ((u)>>8)&0xff; (*(b)) = (u)&0xff; }
+#define UINT_TO_RGBA(u,r,g,b,a) { UINT_TO_RGB(((u)>>8),r,g,b); (*(a)) = (u)&0xff; }
+
+using namespace Glib;
+using namespace Gtkmm2ext;
+using namespace std;
+using namespace ArdourCanvas;
+using namespace ArdourSurface;
+
+int Meter::min_pattern_metric_size = 16;
+int Meter::max_pattern_metric_size = 1024;
+bool Meter::no_rgba_overlay = false;
+
+Meter::Pattern10Map Meter::vm_pattern_cache;
+Meter::PatternBgMap Meter::vb_pattern_cache;
+
+Meter::Pattern10Map Meter::hm_pattern_cache;
+Meter::PatternBgMap Meter::hb_pattern_cache;
+
+Meter::Meter (Item* parent, long hold, unsigned long dimen, Orientation o, int len,
+ int clr0, int clr1, int clr2, int clr3,
+ int clr4, int clr5, int clr6, int clr7,
+ int clr8, int clr9,
+ int bgc0, int bgc1,
+ int bgh0, int bgh1,
+ float stp0, float stp1,
+ float stp2, float stp3,
+ int styleflags
+ )
+ : Item (parent)
+ , pixheight(0)
+ , pixwidth(0)
+ , _styleflags(styleflags)
+ , orientation(o)
+ , hold_cnt(hold)
+ , hold_state(0)
+ , bright_hold(false)
+ , current_level(0)
+ , current_peak(0)
+ , highlight(false)
+{
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
+ last_peak_rect.x = 0;
+ last_peak_rect.y = 0;
+
+ no_rgba_overlay = ! Glib::getenv("NO_METER_SHADE").empty();
+
+ _clr[0] = clr0;
+ _clr[1] = clr1;
+ _clr[2] = clr2;
+ _clr[3] = clr3;
+ _clr[4] = clr4;
+ _clr[5] = clr5;
+ _clr[6] = clr6;
+ _clr[7] = clr7;
+ _clr[8] = clr8;
+ _clr[9] = clr9;
+
+ _bgc[0] = bgc0;
+ _bgc[1] = bgc1;
+
+ _bgh[0] = bgh0;
+ _bgh[1] = bgh1;
+
+ _stp[0] = stp0;
+ _stp[1] = stp1;
+ _stp[2] = stp2;
+ _stp[3] = stp3;
+
+ pixrect.x = 1;
+ pixrect.y = 1;
+
+ if (!len) {
+ len = 250;
+ }
+
+ if (orientation == Vertical) {
+ pixheight = len;
+ pixwidth = dimen;
+ fgpattern = request_vertical_meter(pixwidth + 2, pixheight + 2, _clr, _stp, _styleflags);
+ bgpattern = request_vertical_background (pixwidth + 2, pixheight + 2, _bgc, false);
+ } else {
+ pixheight = dimen;
+ pixwidth = len;
+ fgpattern = request_horizontal_meter(pixwidth + 2, pixheight + 2, _clr, _stp, _styleflags);
+ bgpattern = request_horizontal_background (pixwidth + 2, pixheight + 2, _bgc, false);
+ }
+
+ pixrect.width = pixwidth;
+ pixrect.height = pixheight;
+}
+
+void
+Meter::compute_bounding_box () const
+{
+ if (!_canvas) {
+ _bounding_box = boost::optional<Rect> ();
+ _bounding_box_dirty = false;
+ return;
+ }
+
+ Rect r (0, 0, pixwidth + 2, pixheight + 2);
+ _bounding_box = r;
+ _bounding_box_dirty = false;
+}
+
+
+Meter::~Meter ()
+{
+}
+
+void
+Meter::flush_pattern_cache () {
+ hb_pattern_cache.clear();
+ hm_pattern_cache.clear();
+ vb_pattern_cache.clear();
+ vm_pattern_cache.clear();
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+Meter::generate_meter_pattern (int width, int height, int *clr, float *stp, int styleflags, bool horiz)
+{
+ guint8 r,g,b,a;
+ double knee;
+ const double soft = 3.0 / (double) height;
+ const double offs = -1.0 / (double) height;
+
+ cairo_pattern_t* pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, height);
+
+ /*
+ Cairo coordinate space goes downwards as y value goes up, so invert
+ knee-based positions by using (1.0 - y)
+ */
+
+ UINT_TO_RGBA (clr[9], &r, &g, &b, &a); // top/clip
+ cairo_pattern_add_color_stop_rgb (pat, 0.0,
+ r/255.0, g/255.0, b/255.0);
+
+ knee = offs + stp[3] / 115.0f; // -0dB
+
+ UINT_TO_RGBA (clr[8], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee,
+ r/255.0, g/255.0, b/255.0);
+
+ UINT_TO_RGBA (clr[7], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee + soft,
+ r/255.0, g/255.0, b/255.0);
+
+ knee = offs + stp[2]/ 115.0f; // -3dB || -2dB
+
+ UINT_TO_RGBA (clr[6], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee,
+ r/255.0, g/255.0, b/255.0);
+
+ UINT_TO_RGBA (clr[5], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee + soft,
+ r/255.0, g/255.0, b/255.0);
+
+ knee = offs + stp[1] / 115.0f; // -9dB
+
+ UINT_TO_RGBA (clr[4], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee,
+ r/255.0, g/255.0, b/255.0);
+
+ UINT_TO_RGBA (clr[3], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee + soft,
+ r/255.0, g/255.0, b/255.0);
+
+ knee = offs + stp[0] / 115.0f; // -18dB
+
+ UINT_TO_RGBA (clr[2], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee,
+ r/255.0, g/255.0, b/255.0);
+
+ UINT_TO_RGBA (clr[1], &r, &g, &b, &a);
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - knee + soft,
+ r/255.0, g/255.0, b/255.0);
+
+ UINT_TO_RGBA (clr[0], &r, &g, &b, &a); // bottom
+ cairo_pattern_add_color_stop_rgb (pat, 1.0,
+ r/255.0, g/255.0, b/255.0);
+
+ if ((styleflags & 1) && !no_rgba_overlay) {
+ cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, width, 0.0);
+ cairo_pattern_add_color_stop_rgba (shade_pattern, 0, 0.0, 0.0, 0.0, 0.15);
+ cairo_pattern_add_color_stop_rgba (shade_pattern, 0.4, 1.0, 1.0, 1.0, 0.05);
+ cairo_pattern_add_color_stop_rgba (shade_pattern, 1, 0.0, 0.0, 0.0, 0.25);
+
+ cairo_surface_t* surface;
+ cairo_t* tc = 0;
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
+ tc = cairo_create (surface);
+ cairo_set_source (tc, pat);
+ cairo_rectangle (tc, 0, 0, width, height);
+ cairo_fill (tc);
+ cairo_pattern_destroy (pat);
+
+ cairo_set_source (tc, shade_pattern);
+ cairo_rectangle (tc, 0, 0, width, height);
+ cairo_fill (tc);
+ cairo_pattern_destroy (shade_pattern);
+
+ if (styleflags & 2) { // LED stripes
+ cairo_save (tc);
+ cairo_set_line_width(tc, 1.0);
+ cairo_set_source_rgba(tc, .0, .0, .0, 0.4);
+ //cairo_set_operator (tc, CAIRO_OPERATOR_SOURCE);
+ for (int i = 0; float y = 0.5 + i * 2.0; ++i) {
+ if (y >= height) {
+ break;
+ }
+ cairo_move_to(tc, 0, y);
+ cairo_line_to(tc, width, y);
+ cairo_stroke (tc);
+ }
+ cairo_restore (tc);
+ }
+
+ pat = cairo_pattern_create_for_surface (surface);
+ cairo_destroy (tc);
+ cairo_surface_destroy (surface);
+ }
+
+ if (horiz) {
+ cairo_surface_t* surface;
+ cairo_t* tc = 0;
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, height, width);
+ tc = cairo_create (surface);
+
+ cairo_matrix_t m;
+ cairo_matrix_init_rotate (&m, -M_PI/2.0);
+ cairo_matrix_translate (&m, -height, 0);
+ cairo_pattern_set_matrix (pat, &m);
+ cairo_set_source (tc, pat);
+ cairo_rectangle (tc, 0, 0, height, width);
+ cairo_fill (tc);
+ cairo_pattern_destroy (pat);
+ pat = cairo_pattern_create_for_surface (surface);
+ cairo_destroy (tc);
+ cairo_surface_destroy (surface);
+ }
+ Cairo::RefPtr<Cairo::Pattern> p (new Cairo::Pattern (pat, false));
+
+ return p;
+}
+
+
+Cairo::RefPtr<Cairo::Pattern>
+Meter::generate_meter_background (int width, int height, int *clr, bool shade, bool horiz)
+{
+ guint8 r0,g0,b0,r1,g1,b1,a;
+
+ cairo_pattern_t* pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, height);
+
+ UINT_TO_RGBA (clr[0], &r0, &g0, &b0, &a);
+ UINT_TO_RGBA (clr[1], &r1, &g1, &b1, &a);
+
+ cairo_pattern_add_color_stop_rgb (pat, 0.0,
+ r1/255.0, g1/255.0, b1/255.0);
+
+ cairo_pattern_add_color_stop_rgb (pat, 1.0,
+ r0/255.0, g0/255.0, b0/255.0);
+
+ if (shade && !no_rgba_overlay) {
+ cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, width, 0.0);
+ cairo_pattern_add_color_stop_rgba (shade_pattern, 0.0, 1.0, 1.0, 1.0, 0.15);
+ cairo_pattern_add_color_stop_rgba (shade_pattern, 0.6, 0.0, 0.0, 0.0, 0.10);
+ cairo_pattern_add_color_stop_rgba (shade_pattern, 1.0, 1.0, 1.0, 1.0, 0.20);
+
+ cairo_surface_t* surface;
+ cairo_t* tc = 0;
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
+ tc = cairo_create (surface);
+ cairo_set_source (tc, pat);
+ cairo_rectangle (tc, 0, 0, width, height);
+ cairo_fill (tc);
+ cairo_set_source (tc, shade_pattern);
+ cairo_rectangle (tc, 0, 0, width, height);
+ cairo_fill (tc);
+
+ cairo_pattern_destroy (pat);
+ cairo_pattern_destroy (shade_pattern);
+
+ pat = cairo_pattern_create_for_surface (surface);
+
+ cairo_destroy (tc);
+ cairo_surface_destroy (surface);
+ }
+
+ if (horiz) {
+ cairo_surface_t* surface;
+ cairo_t* tc = 0;
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, height, width);
+ tc = cairo_create (surface);
+
+ cairo_matrix_t m;
+ cairo_matrix_init_rotate (&m, -M_PI/2.0);
+ cairo_matrix_translate (&m, -height, 0);
+ cairo_pattern_set_matrix (pat, &m);
+ cairo_set_source (tc, pat);
+ cairo_rectangle (tc, 0, 0, height, width);
+ cairo_fill (tc);
+ cairo_pattern_destroy (pat);
+ pat = cairo_pattern_create_for_surface (surface);
+ cairo_destroy (tc);
+ cairo_surface_destroy (surface);
+ }
+
+ Cairo::RefPtr<Cairo::Pattern> p (new Cairo::Pattern (pat, false));
+
+ return p;
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+Meter::request_vertical_meter (int width, int height, int *clr, float *stp, int styleflags)
+{
+ height = max(height, min_pattern_metric_size);
+ height = min(height, max_pattern_metric_size);
+
+ const Pattern10MapKey key (width, height,
+ stp[0], stp[1], stp[2], stp[3],
+ clr[0], clr[1], clr[2], clr[3],
+ clr[4], clr[5], clr[6], clr[7],
+ clr[8], clr[9], styleflags);
+
+ Pattern10Map::iterator i;
+ if ((i = vm_pattern_cache.find (key)) != vm_pattern_cache.end()) {
+ return i->second;
+ }
+ // TODO flush pattern cache if it gets too large
+
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+ width, height, clr, stp, styleflags, false);
+ vm_pattern_cache[key] = p;
+
+ return p;
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+Meter::request_vertical_background (int width, int height, int *bgc, bool shade)
+{
+ height = max(height, min_pattern_metric_size);
+ height = min(height, max_pattern_metric_size);
+ height += 2;
+
+ const PatternBgMapKey key (width, height, bgc[0], bgc[1], shade);
+ PatternBgMap::iterator i;
+ if ((i = vb_pattern_cache.find (key)) != vb_pattern_cache.end()) {
+ return i->second;
+ }
+ // TODO flush pattern cache if it gets too large
+
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_background (
+ width, height, bgc, shade, false);
+ vb_pattern_cache[key] = p;
+
+ return p;
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+Meter::request_horizontal_meter (int width, int height, int *clr, float *stp, int styleflags)
+{
+ width = max(width, min_pattern_metric_size);
+ width = min(width, max_pattern_metric_size);
+
+ const Pattern10MapKey key (width, height,
+ stp[0], stp[1], stp[2], stp[3],
+ clr[0], clr[1], clr[2], clr[3],
+ clr[4], clr[5], clr[6], clr[7],
+ clr[8], clr[9], styleflags);
+
+ Pattern10Map::iterator i;
+ if ((i = hm_pattern_cache.find (key)) != hm_pattern_cache.end()) {
+ return i->second;
+ }
+ // TODO flush pattern cache if it gets too large
+
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+ height, width, clr, stp, styleflags, true);
+
+ hm_pattern_cache[key] = p;
+ return p;
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+Meter::request_horizontal_background(
+ int width, int height, int *bgc, bool shade)
+{
+ width = max(width, min_pattern_metric_size);
+ width = min(width, max_pattern_metric_size);
+ width += 2;
+
+ const PatternBgMapKey key (width, height, bgc[0], bgc[1], shade);
+ PatternBgMap::iterator i;
+ if ((i = hb_pattern_cache.find (key)) != hb_pattern_cache.end()) {
+ return i->second;
+ }
+ // TODO flush pattern cache if it gets too large
+
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_background (
+ height, width, bgc, shade, true);
+
+ hb_pattern_cache[key] = p;
+
+ return p;
+}
+
+void
+Meter::set_hold_count (long val)
+{
+ if (val < 1) {
+ val = 1;
+ }
+
+ hold_cnt = val;
+ hold_state = 0;
+ current_peak = 0;
+
+ redraw ();
+}
+
+void
+Meter::render (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+ if (orientation == Vertical) {
+ return vertical_expose (area, context);
+ } else {
+ return horizontal_expose (area, context);
+ }
+}
+
+void
+Meter::vertical_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+ gint top_of_meter;
+ Cairo::RectangleInt background;
+ Cairo::RectangleInt area_r;
+
+ area_r.x = area.x0;
+ area_r.y = area.y0;
+ area_r.width = area.width();
+ area_r.height = area.height();
+
+ context->set_source_rgb (0, 0, 0); // black
+ rounded_rectangle (context, 0, 0, pixwidth + 2, pixheight + 2, 2);
+ context->stroke ();
+
+ top_of_meter = (gint) floor (pixheight * current_level);
+
+ /* reset the height & origin of the rect that needs to show the pixbuf
+ */
+
+ pixrect.height = top_of_meter;
+ pixrect.y = 1 + pixheight - top_of_meter;
+
+ background.x = 1;
+ background.y = 1;
+ background.width = pixrect.width;
+ background.height = pixheight - top_of_meter;
+
+ Cairo::RefPtr<Cairo::Region> r1 = Cairo::Region::create (area_r);
+ r1->intersect (background);
+
+ if (!r1->empty()) {
+ Cairo::RectangleInt i (r1->get_extents ());
+ context->rectangle (i.x, i.y, i.width, i.height);
+ context->set_source (bgpattern);
+ context->fill ();
+ }
+
+ Cairo::RefPtr<Cairo::Region> r2 = Cairo::Region::create (area_r);
+ r2->intersect (pixrect);
+
+ if (!r2->empty()) {
+ // draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
+ Cairo::RectangleInt i (r2->get_extents ());
+ context->rectangle (i.x, i.y, i.width, i.height);
+ context->set_source (fgpattern);
+ context->fill ();
+ }
+
+ // draw peak bar
+
+ if (hold_state) {
+ last_peak_rect.x = 1;
+ last_peak_rect.width = pixwidth;
+ last_peak_rect.y = max(1, 1 + pixheight - (int) floor (pixheight * current_peak));
+ if (_styleflags & 2) { // LED stripes
+ last_peak_rect.y = max(0, (last_peak_rect.y & (~1)));
+ }
+ if (bright_hold || (_styleflags & 2)) {
+ last_peak_rect.height = max(0, min(3, pixheight - last_peak_rect.y - 1 ));
+ } else {
+ last_peak_rect.height = max(0, min(2, pixheight - last_peak_rect.y - 1 ));
+ }
+
+ context->set_source (fgpattern);
+ context->rectangle (last_peak_rect.x, last_peak_rect.y, last_peak_rect.width, last_peak_rect.height);
+
+ if (bright_hold && !no_rgba_overlay) {
+ context->fill_preserve ();
+ context->set_source_rgba (1.0, 1.0, 1.0, 0.3);
+ }
+ context->fill ();
+
+ } else {
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
+ }
+}
+
+void
+Meter::horizontal_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+ gint right_of_meter;
+ Cairo::RectangleInt background;
+ Cairo::RectangleInt area_r;
+
+ Rect area2 = window_to_item (area);
+
+ area_r.x = area2.x0;
+ area_r.y = area2.y0;
+ area_r.width = area2.width();
+ area_r.height = area2.height();
+
+ context->set_source_rgb (0, 0, 0); // black
+ rounded_rectangle (context, 0, 0, pixwidth + 2, pixheight + 2, 2);
+ context->stroke ();
+
+ right_of_meter = (gint) floor (pixwidth * current_level);
+
+ /* reset the height & origin of the rect that needs to show the pixbuf
+ */
+
+ pixrect.width = right_of_meter;
+
+ background.x = 1 + right_of_meter;
+ background.y = 1;
+ background.width = pixwidth - right_of_meter;
+ background.height = pixheight;
+
+ Cairo::RefPtr<Cairo::Region> r1 = Cairo::Region::create (area_r);
+ r1->intersect (background);
+
+ if (!r1->empty()) {
+ Cairo::RectangleInt i (r1->get_extents ());
+ context->rectangle (i.x, i.y, i.width, i.height);
+ context->set_source (bgpattern);
+ context->fill ();
+ }
+
+ Cairo::RefPtr<Cairo::Region> r2 = Cairo::Region::create (area_r);
+ r2->intersect (pixrect);
+
+ if (!r2->empty()) {
+ // draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
+ Cairo::RectangleInt i (r2->get_extents ());
+ cerr << "h-render-fg: " << i.x << ", " << i.y << ' ' << i.width << " + " << i.height << endl;
+ context->rectangle (i.x, i.y, i.width, i.height);
+ context->set_source (fgpattern);
+ context->fill ();
+ }
+
+ // draw peak bar
+
+ if (hold_state) {
+ last_peak_rect.y = 1;
+ last_peak_rect.height = pixheight;
+ const int xpos = floor (pixwidth * current_peak);
+ if (bright_hold || (_styleflags & 2)) {
+ last_peak_rect.width = min(3, xpos );
+ } else {
+ last_peak_rect.width = min(2, xpos );
+ }
+ last_peak_rect.x = 1 + max(0, xpos - last_peak_rect.width);
+
+ context->set_source (fgpattern);
+ context->rectangle (last_peak_rect.x, last_peak_rect.y, last_peak_rect.width, last_peak_rect.height);
+
+ if (bright_hold && !no_rgba_overlay) {
+ context->fill_preserve ();
+ context->set_source_rgba (1.0, 1.0, 1.0, 0.3);
+ }
+ context->fill ();
+
+ } else {
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
+ }
+}
+
+void
+Meter::set (float lvl, float peak)
+{
+ float old_level = current_level;
+ float old_peak = current_peak;
+
+ if (pixwidth <= 0 || pixheight <=0) return;
+
+ if (peak == -1) {
+ if (lvl >= current_peak) {
+ current_peak = lvl;
+ hold_state = hold_cnt;
+ }
+
+ if (hold_state > 0) {
+ if (--hold_state == 0) {
+ current_peak = lvl;
+ }
+ }
+ bright_hold = false;
+ } else {
+ current_peak = peak;
+ hold_state = 1;
+ bright_hold = true;
+ }
+
+ current_level = lvl;
+
+ const float pixscale = (orientation == Vertical) ? pixheight : pixwidth;
+#define PIX(X) floor(pixscale * (X))
+ if (PIX(current_level) == PIX(old_level) && PIX(current_peak) == PIX(old_peak) && (hold_state == 0 || peak != -1)) {
+ return;
+ }
+
+ if (orientation == Vertical) {
+ //queue_vertical_redraw (old_level);
+ } else {
+ //queue_horizontal_redraw (old_level);
+ }
+
+ redraw ();
+}
+
+void
+Meter::queue_vertical_redraw (float old_level)
+{
+ Cairo::RectangleInt rect;
+
+ gint new_top = (gint) floor (pixheight * current_level);
+
+ rect.x = 1;
+ rect.width = pixwidth;
+ rect.height = new_top;
+ rect.y = 1 + 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;
+ }
+
+ Cairo::RefPtr<Cairo::Region> region;
+ bool queue = false;
+
+ if (rect.height != 0) {
+
+ /* ok, first region to draw ... */
+
+ region = Cairo::Region::create (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 = Cairo::Region::create ();
+ queue = true;
+ }
+ region->do_union (last_peak_rect);
+ }
+
+ if (hold_state && current_peak > 0) {
+ if (!queue) {
+ region = Cairo::Region::create ();
+ queue = true;
+ }
+ rect.x = 1;
+ rect.y = max(1, 1 + pixheight - (int) floor (pixheight * current_peak));
+ if (_styleflags & 2) { // LED stripes
+ rect.y = max(0, (rect.y & (~1)));
+ }
+ if (bright_hold || (_styleflags & 2)) {
+ rect.height = max(0, min(3, pixheight - last_peak_rect.y -1 ));
+ } else {
+ rect.height = max(0, min(2, pixheight - last_peak_rect.y -1 ));
+ }
+ rect.width = pixwidth;
+ region->do_union (rect);
+ }
+
+ if (queue) {
+ if (visible() && _bounding_box && _canvas) {
+ Cairo::RectangleInt iri = region->get_extents();
+ Rect ir (iri.x, iri.y, iri.x + iri.width, iri.y + iri.height);
+ _canvas->request_redraw (item_to_window (ir));
+ }
+ }
+}
+
+void
+Meter::queue_horizontal_redraw (float old_level)
+{
+ Cairo::RectangleInt rect;
+
+ gint new_right = (gint) floor (pixwidth * current_level);
+
+ rect.height = pixheight;
+ rect.y = 1;
+
+ if (current_level > old_level) {
+ rect.x = 1 + pixrect.width;
+ /* colored/pixbuf got larger, just draw the new section */
+ rect.width = new_right - pixrect.width;
+ } else {
+ /* it got smaller, compute the difference */
+ rect.x = 1 + new_right;
+ /* rect.height is the old.x (smaller) minus the new.x (larger) */
+ rect.width = pixrect.width - new_right;
+ }
+
+ Cairo::RefPtr<Cairo::Region> region;
+ bool queue = false;
+
+ if (rect.height != 0) {
+
+ /* ok, first region to draw ... */
+
+ region = Cairo::Region::create (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 = Cairo::Region::create ();
+ queue = true;
+ }
+ region->do_union (last_peak_rect);
+ }
+
+ if (hold_state && current_peak > 0) {
+ if (!queue) {
+ region = Cairo::Region::create ();
+ queue = true;
+ }
+ rect.y = 1;
+ rect.height = pixheight;
+ const int xpos = floor (pixwidth * current_peak);
+ if (bright_hold || (_styleflags & 2)) {
+ rect.width = min(3, xpos);
+ } else {
+ rect.width = min(2, xpos);
+ }
+ rect.x = 1 + max(0, xpos - rect.width);
+ region->do_union (rect);
+ }
+
+ if (queue) {
+ if (visible() && _bounding_box && _canvas) {
+ Cairo::RectangleInt iri = region->get_extents();
+ Rect ir (iri.x, iri.y, iri.x + iri.width, iri.y + iri.height);
+ _canvas->request_redraw (item_to_window (ir));
+ }
+ }
+}
+
+void
+Meter::set_highlight (bool onoff)
+{
+ if (highlight == onoff) {
+ return;
+ }
+ highlight = onoff;
+ if (orientation == Vertical) {
+ bgpattern = request_vertical_background (pixwidth + 2, pixheight + 2, highlight ? _bgh : _bgc, highlight);
+ } else {
+ bgpattern = request_horizontal_background (pixwidth + 2, pixheight + 2, highlight ? _bgh : _bgc, highlight);
+ }
+ redraw ();
+}
+
+void
+Meter::clear ()
+{
+ current_level = 0;
+ current_peak = 0;
+ hold_state = 0;
+ redraw ();
+}
--- /dev/null
+/*
+ Copyright (C) 2003 Paul Davis
+
+ 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.
+
+*/
+
+#ifndef __push2_meter_h__
+#define __push2_meter_h__
+
+#include <map>
+#include <boost/tuple/tuple.hpp>
+#include <boost/tuple/tuple_comparison.hpp>
+
+#include <cairomm/pattern.h>
+#include <cairomm/region.h>
+
+#include "canvas/item.h"
+
+namespace ArdourSurface {
+
+class Meter : public ArdourCanvas::Item {
+ public:
+ enum Orientation {
+ Horizontal,
+ Vertical
+ };
+
+ Meter (Item* parent,
+ long hold_cnt, unsigned long width, Orientation, int len=0,
+ int clr0=0x008800ff, int clr1=0x008800ff,
+ int clr2=0x00ff00ff, int clr3=0x00ff00ff,
+ int clr4=0xffaa00ff, int clr5=0xffaa00ff,
+ int clr6=0xffff00ff, int clr7=0xffff00ff,
+ int clr8=0xff0000ff, int clr9=0xff0000ff,
+ int bgc0=0x333333ff, int bgc1=0x444444ff,
+ int bgh0=0x991122ff, int bgh1=0x551111ff,
+ float stp0 = 55.0, // log_meter(-18);
+ float stp1 = 77.5, // log_meter(-9);
+ float stp2 = 92.5, // log_meter(-3); // 95.0, // log_meter(-2);
+ float stp3 = 100.0,
+ int styleflags = 3
+ );
+ virtual ~Meter ();
+ static void flush_pattern_cache();
+
+ void set (float level, float peak = -1);
+ void clear ();
+
+ float get_level() { return current_level; }
+ float get_user_level() { return current_user_level; }
+ float get_peak() { return current_peak; }
+
+ long hold_count() { return hold_cnt; }
+ void set_hold_count (long);
+ void set_highlight (bool);
+ bool get_highlight () { return highlight; }
+
+ void render (ArdourCanvas::Rect const &, Cairo::RefPtr<Cairo::Context>) const;
+ void compute_bounding_box() const;
+
+ private:
+
+ Cairo::RefPtr<Cairo::Pattern> fgpattern;
+ Cairo::RefPtr<Cairo::Pattern> bgpattern;
+ gint pixheight;
+ gint pixwidth;
+
+ float _stp[4];
+ int _clr[10];
+ int _bgc[2];
+ int _bgh[2];
+ int _styleflags;
+
+ Orientation orientation;
+ mutable Cairo::RectangleInt pixrect;
+ mutable Cairo::RectangleInt last_peak_rect;
+ gint request_width;
+ gint request_height;
+ unsigned long hold_cnt;
+ unsigned long hold_state;
+ bool bright_hold;
+ float current_level;
+ float current_peak;
+ float current_user_level;
+ bool highlight;
+
+ void vertical_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
+ void queue_vertical_redraw (float old_level);
+
+ void horizontal_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
+ void queue_horizontal_redraw (float old_level);
+
+ static bool no_rgba_overlay;
+
+ static Cairo::RefPtr<Cairo::Pattern> generate_meter_pattern (
+ int, int, int *, float *, int, bool);
+ static Cairo::RefPtr<Cairo::Pattern> request_vertical_meter (
+ int, int, int *, float *, int);
+ static Cairo::RefPtr<Cairo::Pattern> request_horizontal_meter (
+ int, int, int *, float *, int);
+
+ static Cairo::RefPtr<Cairo::Pattern> generate_meter_background (
+ int, int, int *, bool, bool);
+ static Cairo::RefPtr<Cairo::Pattern> request_vertical_background (
+ int, int, int *, bool);
+ static Cairo::RefPtr<Cairo::Pattern> request_horizontal_background (
+ int, int, int *, bool);
+
+ struct Pattern10MapKey {
+ Pattern10MapKey (
+ int w, int h,
+ float stp0, float stp1, float stp2, float stp3,
+ int c0, int c1, int c2, int c3,
+ int c4, int c5, int c6, int c7,
+ int c8, int c9, int st
+ )
+ : dim(w, h)
+ , stp(stp0, stp1, stp2, stp3)
+ , cols(c0, c1, c2, c3, c4, c5, c6, c7, c8, c9)
+ , style(st)
+ {}
+ inline bool operator<(const Pattern10MapKey& rhs) const {
+ return (dim < rhs.dim)
+ || (dim == rhs.dim && stp < rhs.stp)
+ || (dim == rhs.dim && stp == rhs.stp && cols < rhs.cols)
+ || (dim == rhs.dim && stp == rhs.stp && cols == rhs.cols && style < rhs.style);
+ }
+ boost::tuple<int, int> dim;
+ boost::tuple<float, float, float, float> stp;
+ boost::tuple<int, int, int, int, int, int, int, int, int, int> cols;
+ int style;
+ };
+ typedef std::map<Pattern10MapKey, Cairo::RefPtr<Cairo::Pattern> > Pattern10Map;
+
+ struct PatternBgMapKey {
+ PatternBgMapKey (int w, int h, int c0, int c1, bool shade)
+ : dim(w, h)
+ , cols(c0, c1)
+ , sh(shade)
+ {}
+ inline bool operator<(const PatternBgMapKey& rhs) const {
+ return (dim < rhs.dim) || (dim == rhs.dim && cols < rhs.cols) || (dim == rhs.dim && cols == rhs.cols && (sh && !rhs.sh));
+ }
+ boost::tuple<int, int> dim;
+ boost::tuple<int, int> cols;
+ bool sh;
+ };
+ typedef std::map<PatternBgMapKey, Cairo::RefPtr<Cairo::Pattern> > PatternBgMap;
+
+ static Pattern10Map vm_pattern_cache;
+ static PatternBgMap vb_pattern_cache;
+ static Pattern10Map hm_pattern_cache;
+ static PatternBgMap hb_pattern_cache;
+ static int min_pattern_metric_size; // min dimension for axis that displays the meter level
+ static int max_pattern_metric_size; // max dimension for axis that displays the meter level
+};
+
+} /* namespace */
+
+#endif /* __push2_meter_h__ */
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