From 29b80725559c8fd60ae51bf33270963e647d0c1c Mon Sep 17 00:00:00 2001 From: Paul Davis Date: Sun, 25 Sep 2016 15:01:26 -0500 Subject: add canvas-based Meter object --- libs/canvas/canvas/meter.h | 192 ++++++++++ libs/canvas/meter.cc | 900 +++++++++++++++++++++++++++++++++++++++++++++ libs/canvas/wscript | 1 + 3 files changed, 1093 insertions(+) create mode 100644 libs/canvas/canvas/meter.h create mode 100644 libs/canvas/meter.cc (limited to 'libs/canvas') diff --git a/libs/canvas/canvas/meter.h b/libs/canvas/canvas/meter.h new file mode 100644 index 0000000000..3a1a46cab2 --- /dev/null +++ b/libs/canvas/canvas/meter.h @@ -0,0 +1,192 @@ +/* + 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 +#include +#include + +#include +#include + +#include "canvas/item.h" + +namespace ArdourCanvas { + +class Canvas; + +class Meter : public 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 + ); + + Meter (ArdourCanvas::Canvas* canvas, + 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) const; + void compute_bounding_box() const; + + private: + + Cairo::RefPtr fgpattern; + Cairo::RefPtr 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; + unsigned long hold_cnt; + unsigned long hold_state; + bool bright_hold; + float current_level; + float current_peak; + float current_user_level; + bool highlight; + + void init (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 dimen, int len); + + void vertical_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr context) const; + void queue_vertical_redraw (float old_level); + + void horizontal_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr context) const; + void queue_horizontal_redraw (float old_level); + + static bool no_rgba_overlay; + + static Cairo::RefPtr generate_meter_pattern (int, int, int *, float *, int, bool); + static Cairo::RefPtr vertical_meter_pattern (int, int, int *, float *, int); + static Cairo::RefPtr horizontal_meter_pattern (int, int, int *, float *, int); + + static Cairo::RefPtr generate_meter_background (int, int, int *, bool, bool); + static Cairo::RefPtr vertical_background (int, int, int *, bool); + static Cairo::RefPtr 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 dim; + boost::tuple stp; + boost::tuple cols; + int style; + }; + typedef std::map > 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 dim; + boost::tuple cols; + bool sh; + }; + typedef std::map > 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__ */ diff --git a/libs/canvas/meter.cc b/libs/canvas/meter.cc new file mode 100644 index 0000000000..d71370ad48 --- /dev/null +++ b/libs/canvas/meter.cc @@ -0,0 +1,900 @@ +/* + 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 +#include +#include +#include + +#include + +#include + +#include +#include + +#include "canvas/canvas.h" +#include "canvas/colors.h" +#include "canvas/meter.h" +#include "canvas/utils.h" + +using namespace Glib; +using namespace std; +using namespace ArdourCanvas; +using namespace Gtkmm2ext; + +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) +{ + init (clr0, clr1, clr2, clr3, clr4, clr5, clr6, clr7, clr8, clr9, bgc0, bgc1, bgh0, bgh1, stp0, stp1, stp2, stp3, dimen, len); +} + +Meter::Meter (Canvas* canvas, 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 (canvas) + , 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) +{ + init (clr0, clr1, clr2, clr3, clr4, clr5, clr6, clr7, clr8, clr9, bgc0, bgc1, bgh0, bgh1, stp0, stp1, stp2, stp3, dimen, len); +} + +void +Meter::init (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 dimen, + int len) +{ + 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 = vertical_meter_pattern (pixwidth + 2, pixheight + 2, _clr, _stp, _styleflags); + bgpattern = vertical_background (pixwidth + 2, pixheight + 2, _bgc, false); + } else { + pixheight = dimen; + pixwidth = len; + fgpattern = horizontal_meter_pattern (pixwidth + 2, pixheight + 2, _clr, _stp, _styleflags); + bgpattern = 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 (); + _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 +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 p (new Cairo::Pattern (pat, false)); + + return p; +} + + +Cairo::RefPtr +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 p (new Cairo::Pattern (pat, false)); + + return p; +} + +Cairo::RefPtr +Meter::vertical_meter_pattern (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 p = generate_meter_pattern (width, height, clr, stp, styleflags, false); + vm_pattern_cache[key] = p; + + return p; +} + +Cairo::RefPtr +Meter::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 p = generate_meter_background (width, height, bgc, shade, false); + vb_pattern_cache[key] = p; + + return p; +} + +Cairo::RefPtr +Meter::horizontal_meter_pattern (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 p = generate_meter_pattern (height, width, clr, stp, styleflags, true); + + hm_pattern_cache[key] = p; + return p; +} + +Cairo::RefPtr +Meter::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 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 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 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; + + /* translate so that item coordinates match window coordinates */ + Duple origin (0, 0); + origin = item_to_window (origin); + context->translate (origin.x, origin.y); + + Cairo::RefPtr 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 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; + } + + context->translate (-origin.x, -origin.y); +} + +void +Meter::horizontal_expose (ArdourCanvas::Rect const & area, Cairo::RefPtr context) const +{ + gint right_of_meter; + Cairo::RectangleInt background; + Cairo::RectangleInt area_r; + + /* convert expose area back to item coordinate space */ + Rect area2 = window_to_item (area); + + + /* create a Cairo object so that we can use intersect and Region */ + area_r.x = area2.x0; + area_r.y = area2.y0; + area_r.width = area2.width(); + area_r.height = area2.height(); + + /* draw the edge (rounded corners) */ + context->set_source_rgb (0, 0, 0); // black + rounded_rectangle (context, 0, 0, pixwidth + 2, pixheight + 2, 2); + context->stroke (); + + /* horizontal meter extends from left to right. Compute the right edge */ + right_of_meter = (gint) floor (pixwidth * current_level); + + /* reset the width the rect that needs to show the pattern of the meter */ + pixrect.width = right_of_meter; + + /* compute a rect for the part of the meter that is all background */ + background.x = 1 + right_of_meter; + background.y = 1; + background.width = pixwidth - right_of_meter; + background.height = pixheight; + + /* translate so that item coordinates match window coordinates */ + Duple origin (0, 0); + origin = item_to_window (origin); + context->translate (origin.x, origin.y); + + Cairo::RefPtr r; + + r = Cairo::Region::create (area_r); + r->intersect (background); + + if (!r->empty()) { + /* draw the background part */ + Cairo::RectangleInt i (r->get_extents ()); + context->set_source (bgpattern); + context->rectangle (i.x, i.y, i.width, i.height); + context->fill (); + + } + + r = Cairo::Region::create (area_r); + r->intersect (pixrect); + + if (!r->empty()) { + // draw the part of the meter image that we need. + Cairo::RectangleInt i (r->get_extents ()); + Duple d (i.x, i.y); + context->set_source (fgpattern); + context->rectangle (i.x, i.y, i.width, i.height); + 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; + } + + context->translate (-origin.x, -origin.y); +} + +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 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 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 = vertical_background (pixwidth + 2, pixheight + 2, highlight ? _bgh : _bgc, highlight); + } else { + bgpattern = horizontal_background (pixwidth + 2, pixheight + 2, highlight ? _bgh : _bgc, highlight); + } + redraw (); +} + +void +Meter::clear () +{ + current_level = 0; + current_peak = 0; + hold_state = 0; + redraw (); +} diff --git a/libs/canvas/wscript b/libs/canvas/wscript index 0038b783c6..fa6dabb080 100644 --- a/libs/canvas/wscript +++ b/libs/canvas/wscript @@ -46,6 +46,7 @@ canvas_sources = [ 'line.cc', 'line_set.cc', 'lookup_table.cc', + 'meter.cc', 'outline.cc', 'pixbuf.cc', 'poly_item.cc', -- cgit v1.2.3