From d4c28adc6fae01b5d27f9be096aaac28b0cef844 Mon Sep 17 00:00:00 2001 From: Paul Davis Date: Wed, 6 May 2015 13:04:33 -0400 Subject: [PATCH] add Waves Tracks version of fastmeter --- libs/gtkmm2ext/waves_fastmeter.cc | 935 ++++++++++++++++++++++++++++++ 1 file changed, 935 insertions(+) create mode 100644 libs/gtkmm2ext/waves_fastmeter.cc diff --git a/libs/gtkmm2ext/waves_fastmeter.cc b/libs/gtkmm2ext/waves_fastmeter.cc new file mode 100644 index 0000000000..680fca2833 --- /dev/null +++ b/libs/gtkmm2ext/waves_fastmeter.cc @@ -0,0 +1,935 @@ +/* + 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. + + $Id$ +*/ + +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include + +#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 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(1) + , 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 = 0; + pixrect.y = 0; + + if (!len) { + len = 250; + } + if (orientation == Vertical) { + pixheight = len; + pixwidth = dimen; + fgpattern = request_vertical_meter(pixwidth, pixheight, _clr, _stp, _styleflags); + bgpattern = request_vertical_background (pixwidth, pixheight, _bgc); + + } else { + pixheight = dimen; + pixwidth = len; + fgpattern = request_horizontal_meter(pixwidth, pixheight, _clr, _stp, _styleflags); + bgpattern = request_horizontal_background (pixwidth, pixheight, _bgc); + } + + pixrect.width = pixwidth; + pixrect.height = pixheight; + + request_width = pixrect.width; + request_height= pixrect.height; + + clear (); +} + +FastMeter::~FastMeter () +{ +} + +void +FastMeter::flush_pattern_cache () +{ + Pattern10Map::iterator i1; + PatternBgMap::iterator ib; + + for (ib = hb_pattern_cache.begin(); ib != hb_pattern_cache.end(); ++ib) { + hb_pattern_cache.erase(ib); + } + + for (i1 = hm_pattern_cache.begin(); i1 != hm_pattern_cache.end(); ++i1) { + hm_pattern_cache.erase(i1); + } + + for (ib = vb_pattern_cache.begin(); ib != vb_pattern_cache.end(); ++ib) { + vb_pattern_cache.erase(ib); + } + + for (i1 = vm_pattern_cache.begin(); i1 != vm_pattern_cache.end(); ++i1) { + vm_pattern_cache.erase(i1); + } +} + +Cairo::RefPtr +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 (float y=0.5; y < height; y+= 2.0) { + 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 +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 p (new Cairo::Pattern (pat, false)); + + return p; +} + +Cairo::RefPtr +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 p = generate_meter_pattern ( + width, height, clr, stp, styleflags, false); + vm_pattern_cache[key] = p; + + return p; +} + +Cairo::RefPtr +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], false); + 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, false, false); + vb_pattern_cache[key] = p; + + return p; +} + +Cairo::RefPtr +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 p = generate_meter_pattern ( + height, width, clr, stp, styleflags, true); + + hm_pattern_cache[key] = p; + return p; +} + +Cairo::RefPtr +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], false); + 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, false, 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); + pixheight = h; + pixwidth = request_width; + } + + 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); + pixwidth = w; + pixheight = request_height; + } + + CairoWidget::on_size_allocate (alloc); +} + +void +FastMeter::render (cairo_t* cr, cairo_rectangle_t* area) +{ + if (orientation == Vertical) { + return vertical_expose (cr, area); + } else { + return horizontal_expose (cr, 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 = pixheight - top_of_meter; + + background.x = 0; + background.y = 0; + 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; + + // Switching to CAIRO we would like to draw on the container's bkg. + // 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); + // } + + // MEMO: Normaly MATURE OS clips so called invalidated rects itself making APP free of + // heavy operations which OS does with graphic HW + + // NOTE FROM PAUL: GTK does clip already. The invalidated rect isn't the only area + // we want to clip to however, which is why this object/class is called FastMeter. + // I have left stuff commented out as I found it when I merged from Ardour in August 2014, + // but this commenting and the previous MEMO comment represent a misunderstanding + // of what this code is doing. + + // 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_set_source_rgba (cr, 0.69, 0.69, 0.69, 1); + cairo_rectangle (cr, pixrect.x, pixrect.y, pixrect.width, pixrect.height); + cairo_fill (cr); + //} + + // draw peak bar + + if (hold_state) { + last_peak_rect.x = 0; + last_peak_rect.width = pixwidth; + last_peak_rect.y = max(0, pixheight - (gint) floor (pixheight * current_peak)); + if (bright_hold || (_styleflags & 2)) { + last_peak_rect.height = max(0, min(3, pixheight - last_peak_rect.y )); + } else { + last_peak_rect.height = max(0, min(2, pixheight - last_peak_rect.y )); + } + + 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; + + if (current_level == old_level && current_peak == old_peak && (hold_state == 0 || peak != -1)) { + return; + } + + Glib::RefPtr win; + + if ((win = get_window()) == 0) { + 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& win, float old_level) +{ + GdkRectangle rect; + + gint new_top = (gint) floor (pixheight * current_level); + + rect.x = 0; + 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 (hold_state && current_peak > 0) { + if (!queue) { + region = gdk_region_new (); + queue = true; + } + rect.x = 1; + rect.y = max(1, 1 + pixheight - (gint) floor (pixheight * current_peak)); + 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& 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); + } else { + bgpattern = request_horizontal_background (pixwidth + 2, pixheight + 2, highlight ? _bgh : _bgc); + } + queue_draw (); +} + +void +FastMeter::clear () +{ + current_level = 0; + current_peak = 0; + hold_state = 0; + queue_draw (); +} -- 2.30.2