Make level meter colors user definable. Base, Mid, Top, and Clip colors are defined...

[ardour.git] / libs / gtkmm2ext / fastmeter.cc

diff --git a/libs/gtkmm2ext/fastmeter.cc b/libs/gtkmm2ext/fastmeter.cc
index 03745765ab970ebf21d0d9d4d723e3ffac72adc1..7ada5a5a8c96dd095ae7b9cb446f409dd5cccf96 100644 (file)
--- a/libs/gtkmm2ext/fastmeter.cc
+++ b/libs/gtkmm2ext/fastmeter.cc
@@ -27,6 +27,8 @@
 #include <gtkmm/style.h>
 #include <string.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;
@@ -42,14 +44,22 @@ 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::rgb0 = 0;
+int FastMeter::rgb1 = 0;
+int FastMeter::rgb2 = 0;
+int FastMeter::rgb3 = 0;
 
-FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o, int len)
+FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o, int len, int clr0, int clr1, int clr2, int clr3)
 {
        orientation = o;
        hold_cnt = hold;
        hold_state = 0;
        current_peak = 0;
        current_level = 0;
+       rgb0 = clr0;
+       rgb1 = clr1;
+       rgb2 = clr2;
+       rgb3 = clr3;
        
        set_events (BUTTON_PRESS_MASK|BUTTON_RELEASE_MASK);
 
@@ -90,47 +100,62 @@ Glib::RefPtr<Gdk::Pixbuf> FastMeter::request_vertical_meter(int width, int heigh
        
        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;
+       //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;
-       r=0;
-       g=255;
-       b=0;
 
+       guint8 r,g,b,r0,g0,b0,r1,g1,b1,r2,g2,b2,r3,g3,b3,a;
+
+       UINT_TO_RGBA (rgb0, &r0, &g0, &b0, &a);
+       UINT_TO_RGBA (rgb1, &r1, &g1, &b1, &a);
+       UINT_TO_RGBA (rgb2, &r2, &g2, &b2, &a);
+       UINT_TO_RGBA (rgb3, &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++) {
 
-               r = (guint8)floor(255.0 * (float)y/(float)(knee / 2));
-               
+       for (y = 0; y < knee/2; y++) {
+
+               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;
+
+               b = (guint8)floor((float)abs(b1 - b0) * (float)y / (float)(knee/2));
+               (b0 >= b1) ? b = b0 - b : b += b0;
+
                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;
                }
        }
-       
-       for (; y < knee; y++) {
 
-               g = 255 - (guint8)floor(170.0 * (float)(y - knee/ 2)/(float)(knee / 2));
-               
+       int offset = knee - y;
+       for (int i=0; i < offset; i++,y++) {
+
+               r = (guint8)floor((float)abs(r2 - r1) * (float)i / (float)offset);
+               (r1 >= r2) ? r = r1 - r : r += r1;
+
+               g = (guint8)floor((float)abs(g2 - g1) * (float)i / (float)offset);
+               (g1 >= g2) ? g = g1 - g : g += g1;
+
+               b = (guint8)floor((float)abs(b2 - b1) * (float)i / (float)offset);
+               (b1 >= b2) ? b = b1 - b : b += b1;
+
                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;
@@ -138,19 +163,16 @@ Glib::RefPtr<Gdk::Pixbuf> FastMeter::request_vertical_meter(int width, int heigh
                }
        }
 
-       r=255;
-       g=0;
-       b=0;
        for (; y < height; y++) {
                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;
+                       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;
                }
        }
        
        ret = Pixbuf::create_from_data(data, COLORSPACE_RGB, false, 8, width, height, width * 3);
-       v_pixbuf_cache[index] = ret;
+       //v_pixbuf_cache[index] = ret;
 
        return ret;
 }