/*
- Copyright (C) 2003-2006 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 <gtkmm2ext/utils.h>
-#include <gtkmm/style.h>
-#include <cstring>
#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 Gtkmm2ext;
using namespace std;
+int FastMeter::min_pattern_metric_size = 10;
+int FastMeter::max_pattern_metric_size = 1024;
-int FastMeter::min_v_pixbuf_size = 10;
-int FastMeter::max_v_pixbuf_size = 1024;
-Glib::RefPtr<Gdk::Pixbuf>* FastMeter::v_pixbuf_cache = 0;
-
-int FastMeter::min_h_pixbuf_size = 10;
-int FastMeter::max_h_pixbuf_size = 1024;
-Glib::RefPtr<Gdk::Pixbuf>* FastMeter::h_pixbuf_cache = 0;
-
-int FastMeter::_clr0 = 0;
-int FastMeter::_clr1 = 0;
-int FastMeter::_clr2 = 0;
-int FastMeter::_clr3 = 0;
+FastMeter::PatternMap FastMeter::v_pattern_cache;
+FastMeter::PatternMap FastMeter::h_pattern_cache;
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;
set_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK);
- pixrect.x = 0;
+ pixrect.x = 1;
pixrect.y = 0;
if (orientation == Vertical) {
- if (!len)
+ if (!len) {
len = 250;
- pixbuf = request_vertical_meter(dimen, len);
+ }
+ pattern = request_vertical_meter(dimen, len, clr0, clr1, clr2, clr3);
+ pixheight = len;
+ pixwidth = dimen;
} else {
- if (!len)
- len = 186;
- pixbuf = request_horizontal_meter(len, dimen);
+ if (!len) {
+ len = 186; // interesting size, eh?
+ }
+ pattern = request_horizontal_meter(len, dimen, clr0, clr1, clr2, clr3);
+ pixheight = dimen;
+ pixwidth = len;
}
- pixheight = pixbuf->get_height();
- pixwidth = pixbuf->get_width();
-
if (orientation == Vertical) {
- pixrect.width = min (pixwidth, (gint) dimen);
+ pixrect.width = pixwidth;
pixrect.height = pixheight;
} else {
pixrect.width = pixwidth;
pixrect.height = min (pixheight, (gint) dimen);
}
- request_width = pixrect.width;
+ request_width = pixrect.width + 2;
request_height= pixrect.height;
}
-Glib::RefPtr<Gdk::Pixbuf> FastMeter::request_vertical_meter(int width, int height)
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::generate_meter_pattern (
+ int width, int height, int clr0, int clr1, int clr2, int clr3)
{
- if (height < min_v_pixbuf_size)
- height = min_v_pixbuf_size;
- if (height > max_v_pixbuf_size)
- height = max_v_pixbuf_size;
-
- //int index = height - 1;
-
- //if (v_pixbuf_cache == 0) {
- // v_pixbuf_cache = (Glib::RefPtr<Gdk::Pixbuf>*) malloc(sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_v_pixbuf_size);
- // memset(v_pixbuf_cache,0,sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_v_pixbuf_size);
- //}
- Glib::RefPtr<Gdk::Pixbuf> ret;// = v_pixbuf_cache[index];
- //if (ret)
- // return ret;
-
- guint8* data;
-
- data = (guint8*) malloc(width*height * 3);
-
- guint8 r,g,b,r0,g0,b0,r1,g1,b1,r2,g2,b2,r3,g3,b3,a;
-
- 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);
+ 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
- int knee = (int)floor((float)height * 100.0f / 115.0f);
- int y;
- for (y = 0; y < knee/2; y++) {
+ 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);
- r = (guint8)floor((float)abs(r1 - r0) * (float)y / (float)(knee/2));
- (r0 >= r1) ? r = r0 - r : r += r0;
-
- g = (guint8)floor((float)abs(g1 - g0) * (float)y / (float)(knee/2));
- (g0 >= g1) ? g = g0 - g : g += g0;
+ /*
+ Cairo coordinate space goes downwards as y value goes up, so invert
+ knee-based positions by using (1.0 - y)
+ */
- b = (guint8)floor((float)abs(b1 - b0) * (float)y / (float)(knee/2));
- (b0 >= b1) ? b = b0 - b : b += b0;
+ // Clip range top
+ cairo_pattern_add_color_stop_rgb (pat, 0.0,
+ r3/255.0, g3/255.0, b3/255.0);
- for (int x = 0; x < width; x++) {
- data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
- data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
- data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
- }
- }
+ // Clip range bottom
+ cairo_pattern_add_color_stop_rgb (pat, 1.0 - (knee/(double)height),
+ r2/255.0, g2/255.0, b2/255.0);
- int offset = knee - y;
- for (int i=0; i < offset; i++,y++) {
+ // 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);
- r = (guint8)floor((float)abs(r2 - r1) * (float)i / (float)offset);
- (r1 >= r2) ? r = r1 - r : r += r1;
+ // Normal range bottom
+ cairo_pattern_add_color_stop_rgb (pat, 1.0,
+ r0/255.0, g0/255.0, b0/255.0); // top
- g = (guint8)floor((float)abs(g2 - g1) * (float)i / (float)offset);
- (g1 >= g2) ? g = g1 - g : g += g1;
+ Cairo::RefPtr<Cairo::Pattern> p (new Cairo::Pattern (pat, false));
- b = (guint8)floor((float)abs(b2 - b1) * (float)i / (float)offset);
- (b1 >= b2) ? b = b1 - b : b += b1;
+ return p;
+}
- for (int x = 0; x < width; x++) {
- data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
- data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
- data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
- }
- }
- y--;
- for (; y < height; y++) {
- for (int x = 0; x < width; x++) {
- data[ (x+(height-y-1)*width) * 3 + 0 ] = r3;
- data[ (x+(height-y-1)*width) * 3 + 1 ] = g3;
- data[ (x+(height-y-1)*width) * 3 + 2 ] = b3;
- }
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::request_vertical_meter(
+ int width, int height, int clr0, int clr1, int clr2, int clr3)
+{
+ 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;
}
-
- ret = Pixbuf::create_from_data(data, COLORSPACE_RGB, false, 8, width, height, width * 3);
- //v_pixbuf_cache[index] = ret;
- return ret;
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+ width, height, clr0, clr1, clr2, clr3);
+ v_pattern_cache[key] = p;
+
+ return p;
}
-Glib::RefPtr<Gdk::Pixbuf> FastMeter::request_horizontal_meter(int width, int height)
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::request_horizontal_meter(
+ int width, int height, int clr0, int clr1, int clr2, int clr3)
{
- if (width < min_h_pixbuf_size)
- width = min_h_pixbuf_size;
- if (width > max_h_pixbuf_size)
- width = max_h_pixbuf_size;
-
- int index = width - 1;
-
- if (h_pixbuf_cache == 0) {
- h_pixbuf_cache = (Glib::RefPtr<Gdk::Pixbuf>*) malloc(sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_h_pixbuf_size);
- memset(h_pixbuf_cache,0,sizeof(Glib::RefPtr<Gdk::Pixbuf>) * max_h_pixbuf_size);
+ 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;
}
- Glib::RefPtr<Gdk::Pixbuf> ret = h_pixbuf_cache[index];
- if (ret)
- return ret;
- guint8* data;
+ /* flip height/width so that we get the right pattern */
- data = (guint8*) malloc(width*height * 3);
-
- guint8 r,g,b;
- r=0;
- g=255;
- b=0;
+ Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+ height, width, clr0, clr1, clr2, clr3);
- // 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
- int knee = (int)floor((float)width * 100.0f / 115.0f);
-
- int x;
-
- for (x = 0; x < knee / 2; x++) {
-
- r = (guint8)floor(255.0 * (float)x/(float)(knee / 2));
-
- for (int y = 0; y < height; y++) {
- data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
- data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
- data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
- }
- }
-
- for (; x < knee; x++) {
-
- g = 255 - (guint8)floor(170.0 * (float)(x - knee/ 2)/(float)(knee / 2));
-
- for (int y = 0; y < height; y++) {
- data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
- data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
- data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
- }
- }
+ /* rotate to make it horizontal */
- r=255;
- g=0;
- b=0;
- for (; x < width; x++) {
- for (int y = 0; y < height; y++) {
- data[ (x+(height-y-1)*width) * 3 + 0 ] = r;
- data[ (x+(height-y-1)*width) * 3 + 1 ] = g;
- data[ (x+(height-y-1)*width) * 3 + 2 ] = b;
- }
- }
-
- ret = Pixbuf::create_from_data(data, COLORSPACE_RGB, false, 8, width, height, width * 3);
- h_pixbuf_cache[index] = ret;
+ cairo_matrix_t m;
+ cairo_matrix_init_rotate (&m, -M_PI/2.0);
+ cairo_pattern_set_matrix (p->cobj(), &m);
- return ret;
+ h_pattern_cache[key] = p;
+
+ return p;
}
FastMeter::~FastMeter ()
if (val < 1) {
val = 1;
}
-
+
hold_cnt = val;
hold_state = 0;
current_peak = 0;
-
+
queue_draw ();
}
if (orientation == Vertical) {
req->height = request_height;
- req->height = max(req->height, min_v_pixbuf_size);
- req->height = min(req->height, max_v_pixbuf_size);
+ 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_h_pixbuf_size);
- req->width = min(req->width, max_h_pixbuf_size);
+ req->width = max(req->width, min_pattern_metric_size);
+ req->width = min(req->width, max_pattern_metric_size);
req->height = request_height;
}
}
int h = alloc.get_height();
- h = max(h, min_v_pixbuf_size);
- h = min(h, max_v_pixbuf_size);
+ h = max (h, min_pattern_metric_size);
+ h = min (h, max_pattern_metric_size);
- if ( h != alloc.get_height())
- alloc.set_height(h);
+ if (h != alloc.get_height()) {
+ alloc.set_height (h);
+ }
if (pixheight != h) {
- pixbuf = request_vertical_meter(request_width, h);
+ pattern = request_vertical_meter (
+ request_width, h, _clr0, _clr1, _clr2, _clr3);
+ pixheight = h;
+ pixwidth = request_width - 2;
}
} else {
}
int w = alloc.get_width();
- w = max(w, min_h_pixbuf_size);
- w = min(w, max_h_pixbuf_size);
+ w = max (w, min_pattern_metric_size);
+ w = min (w, max_pattern_metric_size);
- if ( w != alloc.get_width())
- alloc.set_width(w);
+ if (w != alloc.get_width()) {
+ alloc.set_width (w);
+ }
if (pixwidth != w) {
- pixbuf = request_horizontal_meter(w, request_height);
+ pattern = request_horizontal_meter (
+ w, request_height, _clr0, _clr1, _clr2, _clr3);
+ pixheight = request_height;
+ pixwidth = w;
}
}
- pixheight = pixbuf->get_height();
- pixwidth = pixbuf->get_width();
-
- DrawingArea::on_size_allocate(alloc);
+ 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
*/
background.x = 0;
background.y = 0;
- background.width = pixrect.width;
+ background.width = pixrect.width + 2;
background.height = pixheight - top_of_meter;
if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
- get_window()->draw_rectangle (get_style()->get_black_gc(), true,
- intersection.x, intersection.y,
- intersection.width, intersection.height);
+ cairo_set_source_rgb (cr, 0, 0, 0); // black
+ cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+ cairo_fill (cr);
}
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)
- get_window()->draw_pixbuf(get_style()->get_fg_gc(get_state()), pixbuf,
- intersection.x, intersection.y,
- intersection.x, intersection.y,
- intersection.width, intersection.height,
- Gdk::RGB_DITHER_NONE, 0, 0);
+ 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) {
- last_peak_rect.x = 0;
+ 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);
- get_window()->draw_pixbuf (get_style()->get_fg_gc(get_state()), pixbuf,
- 0, last_peak_rect.y,
- 0, last_peak_rect.y,
- pixwidth, last_peak_rect.height,
- Gdk::RGB_DITHER_NONE, 0, 0);
+ 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;
}
+ cairo_destroy (cr);
+
return TRUE;
}
bool
FastMeter::horizontal_expose (GdkEventExpose* ev)
{
+ 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 (pixwidth * current_level);
pixrect.width = right_of_meter;
background.height = pixrect.height;
if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
- get_window()->draw_rectangle (get_style()->get_black_gc(), true,
- intersection.x + right_of_meter, intersection.y,
- intersection.width, intersection.height);
+ 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);
}
-
+
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)
- get_window()->draw_pixbuf(get_style()->get_fg_gc(get_state()), pixbuf,
- intersection.x, intersection.y,
- intersection.x, intersection.y,
- pixrect.width, intersection.height,
- Gdk::RGB_DITHER_NONE, 0, 0);
+ 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
+ // draw peak bar
// XXX: peaks don't work properly
/*
if (hold_state && intersection.height > 0) {
Gdk::RGB_DITHER_NONE, 0, 0);
}
*/
-
+
+ cairo_destroy (cr);
+
return true;
}
float old_peak = current_peak;
current_level = lvl;
-
+
if (lvl > current_peak) {
current_peak = lvl;
hold_state = hold_cnt;
}
-
+
if (hold_state > 0) {
if (--hold_state == 0) {
current_peak = lvl;
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 = 0;
+
+ rect.x = 1;
rect.width = pixwidth;
rect.height = new_top;
rect.y = pixheight - new_top;
if (rect.height != 0) {
/* ok, first region to draw ... */
-
+
region = gdk_region_rectangle (&rect);
queue = true;
}
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;
+ queue = true;
}
gdk_region_union_with_rect (region, &last_peak_rect);
- }
+ }
if (queue) {
gdk_window_invalidate_region (win->gobj(), region, true);
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