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-rw-r--r--libs/widgets/fastmeter.cc919
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diff --git a/libs/widgets/fastmeter.cc b/libs/widgets/fastmeter.cc
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+/*
+ Copyright (C) 2003-2006 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.
+*/
+
+#include <iostream>
+#include <cmath>
+#include <algorithm>
+#include <cstring>
+
+#include <stdlib.h>
+
+#include <glibmm.h>
+#include <gdkmm.h>
+
+#include "gtkmm2ext/utils.h"
+#include "widgets/fastmeter.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 Gtk;
+using namespace Glib;
+using namespace Gtkmm2ext;
+using namespace ArdourWidgets;
+using namespace std;
+
+int FastMeter::min_pattern_metric_size = 16;
+int FastMeter::max_pattern_metric_size = 1024;
+bool FastMeter::no_rgba_overlay = false;
+
+FastMeter::Pattern10Map FastMeter::vm_pattern_cache;
+FastMeter::PatternBgMap FastMeter::vb_pattern_cache;
+
+FastMeter::Pattern10Map FastMeter::hm_pattern_cache;
+FastMeter::PatternBgMap FastMeter::hb_pattern_cache;
+
+FastMeter::FastMeter (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
+ )
+ : 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;
+
+ set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
+
+ 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;
+
+ request_width = pixrect.width + 2;
+ request_height= pixrect.height + 2;
+
+ clear ();
+}
+
+FastMeter::~FastMeter ()
+{
+}
+
+void
+FastMeter::flush_pattern_cache () {
+ hb_pattern_cache.clear();
+ hm_pattern_cache.clear();
+ vb_pattern_cache.clear();
+ vm_pattern_cache.clear();
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::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>
+FastMeter::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>
+FastMeter::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>
+FastMeter::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>
+FastMeter::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>
+FastMeter::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
+FastMeter::set_hold_count (long val)
+{
+ if (val < 1) {
+ val = 1;
+ }
+
+ hold_cnt = val;
+ hold_state = 0;
+ current_peak = 0;
+
+ queue_draw ();
+}
+
+void
+FastMeter::on_size_request (GtkRequisition* req)
+{
+ if (orientation == Vertical) {
+ vertical_size_request (req);
+ } else {
+ horizontal_size_request (req);
+ }
+}
+
+void
+FastMeter::vertical_size_request (GtkRequisition* req)
+{
+ req->height = request_height;
+ req->height = max(req->height, min_pattern_metric_size);
+ req->height = min(req->height, max_pattern_metric_size);
+ req->height += 2;
+
+ req->width = request_width;
+}
+
+void
+FastMeter::horizontal_size_request (GtkRequisition* req)
+{
+ req->width = request_width;
+ req->width = max(req->width, min_pattern_metric_size);
+ req->width = min(req->width, max_pattern_metric_size);
+ req->width += 2;
+
+ req->height = request_height;
+}
+
+void
+FastMeter::on_size_allocate (Gtk::Allocation &alloc)
+{
+ if (orientation == Vertical) {
+ vertical_size_allocate (alloc);
+ } else {
+ horizontal_size_allocate (alloc);
+ }
+ queue_draw ();
+}
+
+void
+FastMeter::vertical_size_allocate (Gtk::Allocation &alloc)
+{
+ if (alloc.get_width() != request_width) {
+ alloc.set_width (request_width);
+ }
+
+ int h = alloc.get_height();
+ h = max (h, min_pattern_metric_size + 2);
+ h = min (h, max_pattern_metric_size + 2);
+
+ if (h != alloc.get_height()) {
+ alloc.set_height (h);
+ }
+
+ if (pixheight != h) {
+ fgpattern = request_vertical_meter (request_width, h, _clr, _stp, _styleflags);
+ bgpattern = request_vertical_background (request_width, h, highlight ? _bgh : _bgc, highlight);
+ pixheight = h - 2;
+ pixwidth = request_width - 2;
+ }
+
+ CairoWidget::on_size_allocate (alloc);
+}
+
+void
+FastMeter::horizontal_size_allocate (Gtk::Allocation &alloc)
+{
+ if (alloc.get_height() != request_height) {
+ alloc.set_height (request_height);
+ }
+
+ int w = alloc.get_width();
+ w = max (w, min_pattern_metric_size + 2);
+ w = min (w, max_pattern_metric_size + 2);
+
+ if (w != alloc.get_width()) {
+ alloc.set_width (w);
+ }
+
+ if (pixwidth != w) {
+ fgpattern = request_horizontal_meter (w, request_height, _clr, _stp, _styleflags);
+ bgpattern = request_horizontal_background (w, request_height, highlight ? _bgh : _bgc, highlight);
+ pixwidth = w - 2;
+ pixheight = request_height - 2;
+ }
+
+ CairoWidget::on_size_allocate (alloc);
+}
+
+void
+FastMeter::render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t* area)
+{
+ if (orientation == Vertical) {
+ return vertical_expose (ctx->cobj(), area);
+ } else {
+ return horizontal_expose (ctx->cobj(), area);
+ }
+}
+
+void
+FastMeter::vertical_expose (cairo_t* cr, cairo_rectangle_t* area)
+{
+ gint top_of_meter;
+ GdkRectangle intersection;
+ GdkRectangle background;
+ GdkRectangle eventarea;
+
+ cairo_set_source_rgb (cr, 0, 0, 0); // black
+ rounded_rectangle (cr, 0, 0, pixwidth + 2, pixheight + 2, 2);
+ cairo_stroke (cr);
+
+ 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;
+
+ eventarea.x = area->x;
+ eventarea.y = area->y;
+ eventarea.width = area->width;
+ eventarea.height = area->height;
+
+ if (gdk_rectangle_intersect (&background, &eventarea, &intersection)) {
+ cairo_set_source (cr, bgpattern->cobj());
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
+ }
+
+ if (gdk_rectangle_intersect (&pixrect, &eventarea, &intersection)) {
+ // draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
+ cairo_set_source (cr, fgpattern->cobj());
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
+ }
+
+ // 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 ));
+ }
+
+ cairo_set_source (cr, fgpattern->cobj());
+ cairo_rectangle (cr, last_peak_rect.x, last_peak_rect.y, last_peak_rect.width, last_peak_rect.height);
+
+ if (bright_hold && !no_rgba_overlay) {
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.3);
+ }
+ cairo_fill (cr);
+
+ } else {
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
+ }
+}
+
+void
+FastMeter::horizontal_expose (cairo_t* cr, cairo_rectangle_t* area)
+{
+ gint right_of_meter;
+ GdkRectangle intersection;
+ GdkRectangle background;
+ GdkRectangle eventarea;
+
+ cairo_set_source_rgb (cr, 0, 0, 0); // black
+ rounded_rectangle (cr, 0, 0, pixwidth + 2, pixheight + 2, 2);
+ cairo_stroke (cr);
+
+ 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;
+
+ eventarea.x = area->x;
+ eventarea.y = area->y;
+ eventarea.width = area->width;
+ eventarea.height = area->height;
+
+ if (gdk_rectangle_intersect (&background, &eventarea, &intersection)) {
+ cairo_set_source (cr, bgpattern->cobj());
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
+ }
+
+ if (gdk_rectangle_intersect (&pixrect, &eventarea, &intersection)) {
+ cairo_set_source (cr, fgpattern->cobj());
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
+ }
+
+ // 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);
+
+ cairo_set_source (cr, fgpattern->cobj());
+ cairo_rectangle (cr, last_peak_rect.x, last_peak_rect.y, last_peak_rect.width, last_peak_rect.height);
+
+ if (bright_hold && !no_rgba_overlay) {
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.3);
+ }
+ cairo_fill (cr);
+
+ } else {
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
+ }
+}
+
+void
+FastMeter::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;
+ }
+
+ Glib::RefPtr<Gdk::Window> win;
+
+ if (! (win = get_window())) {
+ queue_draw ();
+ return;
+ }
+
+ if (orientation == Vertical) {
+ queue_vertical_redraw (win, old_level);
+ } else {
+ queue_horizontal_redraw (win, old_level);
+ }
+}
+
+void
+FastMeter::queue_vertical_redraw (const Glib::RefPtr<Gdk::Window>& win, float old_level)
+{
+ GdkRectangle 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;
+ }
+
+ 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 (hold_state && current_peak > 0) {
+ if (!queue) {
+ region = gdk_region_new ();
+ 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;
+ gdk_region_union_with_rect (region, &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)
+{
+ GdkRectangle 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;
+ }
+
+ 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 (hold_state && current_peak > 0) {
+ if (!queue) {
+ region = gdk_region_new ();
+ 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);
+ gdk_region_union_with_rect (region, &rect);
+ }
+
+ if (queue) {
+ gdk_window_invalidate_region (win->gobj(), region, true);
+ }
+ if (region) {
+ gdk_region_destroy(region);
+ region = 0;
+ }
+}
+
+void
+FastMeter::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);
+ }
+ queue_draw ();
+}
+
+void
+FastMeter::clear ()
+{
+ current_level = 0;
+ current_peak = 0;
+ hold_state = 0;
+ queue_draw ();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-03 16:13:44 +0000