/*
- Copyright (C) 2003 Paul Davis
+ 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
#include <iostream>
#include <cmath>
#include <algorithm>
+#include <cstring>
+
#include <gdkmm/rectangle.h>
#include <gtkmm2ext/fastmeter.h>
-#include <gtkmm/style.h>
+#include <gtkmm2ext/utils.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 Gdk;
using namespace Glib;
using namespace Gtkmm2ext;
using namespace std;
-RefPtr<Pixmap> FastMeter::v_pixmap;
-RefPtr<Bitmap> FastMeter::v_mask;
-gint FastMeter::v_pixheight = 0;
-gint FastMeter::v_pixwidth = 0;
+int FastMeter::min_pattern_metric_size = 10;
+int FastMeter::max_pattern_metric_size = 1024;
-RefPtr<Pixmap> FastMeter::h_pixmap;
-RefPtr<Bitmap> FastMeter::h_mask;
-gint FastMeter::h_pixheight = 0;
-gint FastMeter::h_pixwidth = 0;
+FastMeter::PatternMap FastMeter::v_pattern_cache;
+FastMeter::PatternMap FastMeter::h_pattern_cache;
-FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o)
+FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o, int len, int clr0, int clr1, int clr2, int clr3)
{
orientation = o;
hold_cnt = hold;
+ resized = true;
hold_state = 0;
current_peak = 0;
current_level = 0;
- current_user_level = -100.0f;
-
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
+ _clr0 = clr0;
+ _clr1 = clr1;
+ _clr2 = clr2;
+ _clr3 = clr3;
+
set_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK);
- pixrect.x = 0;
+ pixrect.x = 1;
pixrect.y = 0;
if (orientation == Vertical) {
- pixrect.width = min (v_pixwidth, (gint) dimen);
- pixrect.height = v_pixheight;
+ if (!len) {
+ len = 250;
+ }
+ pattern = request_vertical_meter(dimen, len, clr0, clr1, clr2, clr3);
+ pixheight = len;
+ pixwidth = dimen;
+ } else {
+ if (!len) {
+ len = 186; // interesting size, eh?
+ }
+ pattern = request_horizontal_meter(len, dimen, clr0, clr1, clr2, clr3);
+ pixheight = dimen;
+ pixwidth = len;
+ }
+
+ if (orientation == Vertical) {
+ pixrect.width = pixwidth;
+ pixrect.height = pixheight;
} else {
- pixrect.width = h_pixwidth;
- pixrect.height = min (h_pixheight, (gint) dimen);
+ pixrect.width = pixwidth;
+ pixrect.height = min (pixheight, (gint) dimen);
}
- request_width = pixrect.width;
+ request_width = pixrect.width + 2;
request_height= pixrect.height;
}
-FastMeter::~FastMeter ()
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::generate_meter_pattern (
+ int width, int height, int clr0, int clr1, int clr2, int clr3)
{
+ guint8 r0,g0,b0,r1,g1,b1,r2,g2,b2,r3,g3,b3,a;
+
+ /*
+ The knee is the hard transition point (e.g. at 0dB where the colors
+ change dramatically to make clipping apparent). Thus there are two
+ gradients in the pattern, the "normal range" and the "clip range", which
+ are separated at the knee point.
+
+ clr0: color at bottom of normal range gradient
+ clr1: color at top of normal range gradient
+ clr2: color at bottom of clip range gradient
+ clr3: color at top of clip range gradient
+ */
+
+ UINT_TO_RGBA (clr0, &r0, &g0, &b0, &a);
+ UINT_TO_RGBA (clr1, &r1, &g1, &b1, &a);
+ UINT_TO_RGBA (clr2, &r2, &g2, &b2, &a);
+ UINT_TO_RGBA (clr3, &r3, &g3, &b3, &a);
+
+ // fake log calculation copied from log_meter.h
+ // actual calculation:
+ // log_meter(0.0f) =
+ // def = (0.0f + 20.0f) * 2.5f + 50f
+ // return def / 115.0f
+
+ const int knee = (int)floor((float)height * 100.0f / 115.0f);
+ cairo_pattern_t* pat = cairo_pattern_create_linear (0.0, 0.0, width, height);
+
+ /*
+ Cairo coordinate space goes downwards as y value goes up, so invert
+ knee-based positions by using (1.0 - y)
+ */
+
+ // Clip range top
+ cairo_pattern_add_color_stop_rgb (pat, 0.0,
+ r3/255.0, g3/255.0, b3/255.0);
+
+ // Clip range bottom
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - (knee/(double)height),
+ r2/255.0, g2/255.0, b2/255.0);
+
+ // Normal range top (double-stop at knee)
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - (knee/(double)height),
+ r1/255.0, g1/255.0, b1/255.0);
+
+ // Normal range bottom
+ cairo_pattern_add_color_stop_rgb (pat, 1.0,
+ r0/255.0, g0/255.0, b0/255.0); // top
+
+ Cairo::RefPtr<Cairo::Pattern> p (new Cairo::Pattern (pat, false));
+
+ return p;
}
-void
-FastMeter::on_realize ()
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::request_vertical_meter(
+ int width, int height, int clr0, int clr1, int clr2, int clr3)
{
- DrawingArea::on_realize();
+ if (height < min_pattern_metric_size)
+ height = min_pattern_metric_size;
+ if (height > max_pattern_metric_size)
+ height = max_pattern_metric_size;
+
+ const PatternMapKey key (width, height, clr0, clr1, clr2, clr3);
+ PatternMap::iterator i;
+ if ((i = v_pattern_cache.find (key)) != v_pattern_cache.end()) {
+ return i->second;
+ }
- RefPtr<Style> style = get_style();
- Color black = style->get_black();
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+ width, height, clr0, clr1, clr2, clr3);
+ v_pattern_cache[key] = p;
- style->set_bg (STATE_NORMAL, black);
- style->set_bg (STATE_ACTIVE, black);
- style->set_bg (STATE_SELECTED, black);
- style->set_bg (STATE_INSENSITIVE, black);
+ return p;
}
-void
-FastMeter::set_vertical_xpm (const char **xpm)
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::request_horizontal_meter(
+ int width, int height, int clr0, int clr1, int clr2, int clr3)
{
- if (v_pixmap == 0) {
- gint w, h;
-
- v_pixmap = Pixmap::create_from_xpm(Colormap::get_system(), v_mask, xpm);
- v_pixmap->get_size(w, h);
-
- v_pixheight = h;
- v_pixwidth = w;
+ if (width < min_pattern_metric_size)
+ width = min_pattern_metric_size;
+ if (width > max_pattern_metric_size)
+ width = max_pattern_metric_size;
+
+ const PatternMapKey key (width, height, clr0, clr1, clr2, clr3);
+ PatternMap::iterator i;
+ if ((i = h_pattern_cache.find (key)) != h_pattern_cache.end()) {
+ return i->second;
}
+
+ /* flip height/width so that we get the right pattern */
+
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+ height, width, clr0, clr1, clr2, clr3);
+
+ /* rotate to make it horizontal */
+
+ cairo_matrix_t m;
+ cairo_matrix_init_rotate (&m, -M_PI/2.0);
+ cairo_pattern_set_matrix (p->cobj(), &m);
+
+ h_pattern_cache[key] = p;
+
+ return p;
}
-void
-FastMeter::set_horizontal_xpm (const char **xpm)
+FastMeter::~FastMeter ()
{
- if (h_pixmap == 0) {
- gint w, h;
-
- h_pixmap = Pixmap::create_from_xpm(Colormap::get_system(), h_mask, xpm);
- h_pixmap->get_size(w, h);
-
- h_pixheight = h;
- h_pixwidth = w;
- }
}
void
if (val < 1) {
val = 1;
}
-
+
hold_cnt = val;
hold_state = 0;
current_peak = 0;
-
+
queue_draw ();
}
void
FastMeter::on_size_request (GtkRequisition* req)
{
- req->width = request_width;
- req->height = request_height;
+ if (orientation == Vertical) {
+
+ req->height = request_height;
+ req->height = max(req->height, min_pattern_metric_size);
+ req->height = min(req->height, max_pattern_metric_size);
+
+ req->width = request_width;
+
+ } else {
+
+ req->width = request_width;
+ req->width = max(req->width, min_pattern_metric_size);
+ req->width = min(req->width, max_pattern_metric_size);
+
+ req->height = request_height;
+ }
+
+}
+
+void
+FastMeter::on_size_allocate (Gtk::Allocation &alloc)
+{
+ if (orientation == Vertical) {
+
+ if (alloc.get_width() != request_width) {
+ alloc.set_width (request_width);
+ }
+
+ int h = alloc.get_height();
+ h = max (h, min_pattern_metric_size);
+ h = min (h, max_pattern_metric_size);
+
+ if (h != alloc.get_height()) {
+ alloc.set_height (h);
+ }
+
+ if (pixheight != h) {
+ pattern = request_vertical_meter (
+ request_width, h, _clr0, _clr1, _clr2, _clr3);
+ pixheight = h;
+ pixwidth = request_width - 2;
+ }
+
+ } else {
+
+ if (alloc.get_height() != request_height) {
+ alloc.set_height(request_height);
+ }
+
+ int w = alloc.get_width();
+ w = max (w, min_pattern_metric_size);
+ w = min (w, max_pattern_metric_size);
+
+ if (w != alloc.get_width()) {
+ alloc.set_width (w);
+ }
+
+ if (pixwidth != w) {
+ pattern = request_horizontal_meter (
+ w, request_height, _clr0, _clr1, _clr2, _clr3);
+ pixheight = request_height;
+ pixwidth = w;
+ }
+ }
+
+ DrawingArea::on_size_allocate (alloc);
+ resized = true;
}
bool
bool
FastMeter::vertical_expose (GdkEventExpose* ev)
{
+ Glib::RefPtr<Gdk::Window> win = get_window ();
gint top_of_meter;
GdkRectangle intersection;
+ GdkRectangle background;
+
+ cairo_t* cr = gdk_cairo_create (get_window ()->gobj());
+
+ if (resized) {
+ cairo_set_source_rgb (cr, 0, 0, 0); // black
+ cairo_rectangle (cr, 0, 0, pixrect.width + 2, pixheight);
+ cairo_fill (cr);
+ }
+
+ cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
+ cairo_clip (cr);
+
+ top_of_meter = (gint) floor (pixheight * current_level);
+
+ /* reset the height & origin of the rect that needs to show the pixbuf
+ */
- top_of_meter = (gint) floor (v_pixheight * current_level);
pixrect.height = top_of_meter;
+ pixrect.y = pixheight - top_of_meter;
+
+ background.x = 0;
+ background.y = 0;
+ background.width = pixrect.width + 2;
+ background.height = pixheight - top_of_meter;
- if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
- /* draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
- */
+ if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
+ cairo_set_source_rgb (cr, 0, 0, 0); // black
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
+ }
- get_window()->draw_drawable(get_style()->get_fg_gc(get_state()), v_pixmap,
- intersection.x, v_pixheight - top_of_meter,
- intersection.x, v_pixheight - top_of_meter,
- intersection.width, intersection.height);
+ if (gdk_rectangle_intersect (&pixrect, &ev->area, &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, pattern->cobj());
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
}
- /* draw peak bar */
-
+ // draw peak bar
+
if (hold_state) {
- get_window()->draw_drawable(get_style()->get_fg_gc(get_state()), v_pixmap,
- intersection.x, v_pixheight - (gint) floor (v_pixheight * current_peak),
- intersection.x, v_pixheight - (gint) floor (v_pixheight * current_peak),
- intersection.width, 3);
+ last_peak_rect.x = 1;
+ last_peak_rect.width = pixwidth;
+ last_peak_rect.y = pixheight - (gint) floor (pixheight * current_peak);
+ last_peak_rect.height = min(3, pixheight - last_peak_rect.y);
+
+ cairo_set_source (cr, pattern->cobj());
+ cairo_rectangle (cr, 1, last_peak_rect.y, pixwidth, last_peak_rect.height);
+ cairo_fill (cr);
+
+ } else {
+ last_peak_rect.width = 0;
+ last_peak_rect.height = 0;
}
- return true;
+ cairo_destroy (cr);
+
+ return TRUE;
}
bool
FastMeter::horizontal_expose (GdkEventExpose* ev)
{
- GdkRectangle intersection;
+ Glib::RefPtr<Gdk::Window> win = get_window ();
gint right_of_meter;
+ GdkRectangle intersection;
+ GdkRectangle background;
+
+ cairo_t* cr = gdk_cairo_create (get_window ()->gobj());
+ cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
+ cairo_clip (cr);
- right_of_meter = (gint) floor (h_pixwidth * current_level);
+ right_of_meter = (gint) floor (pixwidth * current_level);
pixrect.width = right_of_meter;
- if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
+ background.x = 0;
+ background.y = 0;
+ background.width = pixwidth - right_of_meter;
+ background.height = pixrect.height;
- /* draw the part of the meter image that we need.
- */
+ if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
+ cairo_set_source_rgb (cr, 0, 0, 0); // black
+ cairo_rectangle (cr, intersection.x + right_of_meter, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
+ }
- get_window()->draw_drawable(get_style()->get_fg_gc(get_state()), h_pixmap,
- intersection.x, intersection.y,
- intersection.x, intersection.y,
- intersection.width, intersection.height);
+ if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
+ // draw the part of the meter image that we need. the area we draw is bounded "in reverse" (top->bottom)
+ cairo_matrix_t m;
+ cairo_matrix_init_translate (&m, -intersection.x, -intersection.y);
+ cairo_pattern_set_matrix (pattern->cobj(), &m);
+ cairo_set_source (cr, pattern->cobj());
+ cairo_rectangle (cr, intersection.x, intersection.y, pixrect.width, intersection.height);
+ cairo_fill (cr);
}
-
- /* draw peak bar */
-
- if (hold_state) {
- get_window()->draw_drawable(get_style()->get_fg_gc(get_state()), h_pixmap,
- right_of_meter, intersection.y,
- right_of_meter, intersection.y,
- 3, intersection.height);
+
+ // draw peak bar
+ // XXX: peaks don't work properly
+ /*
+ if (hold_state && intersection.height > 0) {
+ gint x = (gint) floor(pixwidth * current_peak);
+
+ get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), pixbuf,
+ x, intersection.y,
+ x, intersection.y,
+ 3, intersection.height,
+ Gdk::RGB_DITHER_NONE, 0, 0);
}
+ */
+
+ cairo_destroy (cr);
return true;
}
void
-FastMeter::set (float lvl, float usrlvl)
+FastMeter::set (float lvl)
{
+ float old_level = current_level;
+ float old_peak = current_peak;
+
current_level = lvl;
- current_user_level = usrlvl;
-
+
if (lvl > current_peak) {
current_peak = lvl;
hold_state = hold_cnt;
}
-
+
if (hold_state > 0) {
if (--hold_state == 0) {
current_peak = lvl;
}
}
+ if (current_level == old_level && current_peak == old_peak && hold_state == 0) {
+ return;
+ }
+
+
+ Glib::RefPtr<Gdk::Window> 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<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 = pixheight - new_top;
+
+ if (current_level > old_level) {
+ /* colored/pixbuf got larger, just draw the new section */
+ /* rect.y stays where it is because of X coordinates */
+ /* height of invalidated area is between new.y (smaller) and old.y
+ (larger).
+ X coordinates just make my brain hurt.
+ */
+ rect.height = pixrect.y - rect.y;
+ } else {
+ /* it got smaller, compute the difference */
+ /* rect.y becomes old.y (the smaller value) */
+ rect.y = pixrect.y;
+ /* rect.height is the old.y (smaller) minus the new.y (larger)
+ */
+ rect.height = pixrect.height - rect.height;
+ }
+
+ GdkRegion* region = 0;
+ bool queue = false;
+
+ if (rect.height != 0) {
+
+ /* ok, first region to draw ... */
+
+ region = gdk_region_rectangle (&rect);
+ queue = true;
+ }
+
+ /* redraw the last place where the last peak hold bar was;
+ the next expose will draw the new one whether its part of
+ expose region or not.
+ */
+
+ if (last_peak_rect.width * last_peak_rect.height != 0) {
+ if (!queue) {
+ region = gdk_region_new ();
+ queue = true;
+ }
+ gdk_region_union_with_rect (region, &last_peak_rect);
+ }
+
+ if (queue) {
+ gdk_window_invalidate_region (win->gobj(), region, true);
+ }
+ if (region) {
+ gdk_region_destroy(region);
+ region = 0;
+ }
+}
+
+void
+FastMeter::queue_horizontal_redraw (const Glib::RefPtr<Gdk::Window>& /*win*/, float /*old_level*/)
+{
+ /* XXX OPTIMIZE (when we have some horizontal meters) */
queue_draw ();
}
projects / ardour.git / blobdiff