replace current VU meter with a three-colored VU meter in main window

Dexed.jucer

@@ -64,6 +64,10 @@
             file="Resources/ui/GlobalEditor_864x144.png"/>
       <FILE id="GAIMQD" name="OperatorEditor_287x218.png" compile="0" resource="1"
             file="Resources/ui/OperatorEditor_287x218.png"/>
+      <FILE id="kqdmAj" name="Meter3C_140x8.png" compile="0" resource="1"
+            file="Resources/ui/Meter3C_140x8.png"/>
+      <FILE id="c6DTJL" name="Meter3C_280x16.png" compile="0" resource="1"
+            file="Resources/ui/Meter3C_280x16.png"/>
     </GROUP>
     <GROUP id="{EA38D88A-6B79-E394-8B57-FA22D50C4D86}" name="Source">
       <GROUP id="{1B64F271-8E56-F19A-FF63-094159E5EF7B}" name="dsp">

Resources/CMakeLists.txt

@@ -22,5 +22,6 @@ juce_add_binary_data(DexedResources SOURCES
     ui/Switch_64x64.png
     ui/Switch_96x52.png
     ui/SwitchLighted_48x26.png
+    ui/Meter3C_140x8.png
     builtin_pgm.zip
 )

Source/DXComponents.cpp

@@ -324,7 +324,6 @@ void VuMeter::paint(Graphics &g) {
     if ( v <= 0 )
         return;
 
-    const int totalBlocks = 46;
     int numBlocks = roundToInt(totalBlocks * v);
 
     if ( numBlocks > 46 )
@@ -334,6 +333,28 @@ void VuMeter::paint(Graphics &g) {
     g.drawImage(myStrip, 0, 0, brkpoint, 8, 0, 8, brkpoint, 8);
 }
 
+
+VuMeterMain::VuMeterMain() {
+    // load the three-colored strip
+    MemoryInputStream mis(BinaryData::Meter3C_140x8_png, BinaryData::Meter3C_140x8_pngSize, false);
+    strip3c = ImageFileFormat::loadFrom(mis);
+}
+
+void VuMeterMain::paint(Graphics& g) {    
+    g.drawImage(strip3c, 0, 0, 140, 8, 0, 0, 140, 8);
+
+    if (v <= 0)
+        return;
+
+    int numBlocks = roundToInt(totalBlocks * v);
+
+    if (numBlocks > 46)
+        numBlocks = totalBlocks;
+    int brkpoint = numBlocks * 3 + 2;
+
+    g.drawImage(strip3c, 0, 0, brkpoint, 8, 0, 8, brkpoint, 8);
+}
+
 LcdDisplay::LcdDisplay() {
     paramMsg = "DEXED " DEXED_VERSION;
 }

Source/DXComponents.h

@@ -41,12 +41,39 @@ class PitchEnvDisplay : public Component {
     void paint(Graphics &g);
 };
 
+// Red-strip VU Meter for Operators' outputs
 class VuMeter: public Component {
     void paint(Graphics &g);
 public : 
+    /// Total number of blocks of the strips,
+    /// according to content of ''Meter3C_140x8_png''.
+    static const int totalBlocks = 46; 
     float v;
 };
 
+// Green-yellow-red-colored VU Meter for Dexed's main output
+class VuMeterMain : public VuMeter {
+public:
+    VuMeterMain();
+    void paint(Graphics& g);
+
+    /// Number of red blocks on the three-colored strip,
+    /// according to the content of ''Meter3C_140x8_png''.
+    static const int numRedBlocks = 6; 
+
+    /// Number of yellow blocks on the three-colored strip,
+    /// according to the content of ''Meter3C_140x8_png''.
+    static const int numYellowBlocks = 6;
+
+    /// Ratio of length of the green+yellow area to total length
+    /// of the three-colored strip.
+    static constexpr float VU_0dB = ((float)(totalBlocks - numRedBlocks)) / ((float)totalBlocks);
+
+    /// Image of a three-colored (green-yellow-red) strip,
+    /// loaded from ''Meter3C_140x8.png''.
+    Image strip3c;
+};
+
 class LcdDisplay : public Component {
 public:
     LcdDisplay();

Source/GlobalEditor.cpp

@@ -7,7 +7,7 @@
   the "//[xyz]" and "//[/xyz]" sections will be retained when the file is loaded
   and re-saved.
 
-  Created with Projucer version: 6.0.7
+  Created with Projucer version: 7.0.7
 
   ------------------------------------------------------------------------------
 
@@ -83,7 +83,7 @@ class AboutBox : public DialogWindow {
         surge->setColour(HyperlinkButton::ColourIds::textColourId, Colour(0xFF4ea097));
         surge->setJustificationType(Justification::left);
         surge->setBounds(18, 458, getWidth() - 36, 30);
-        
+
         // create a new Component to hold ''dexed'' and ''surge'' as subcomponents
         // and set this holder Component as the content component of the DialogWindow
         Component* holder = new Component();
@@ -324,11 +324,11 @@ GlobalEditor::GlobalEditor ()
 
     output->setBounds (157, 60, 34, 34);
 
-    vuOutput.reset (new VuMeter());
-    addAndMakeVisible (vuOutput.get());
-    vuOutput->setName ("vuOutput");
+    m_vuMeterMain.reset(new VuMeterMain());
+    addAndMakeVisible(m_vuMeterMain.get());
+    m_vuMeterMain->setName("id_VuMeterMain");
 
-    vuOutput->setBounds (6, 103, 140, 8);
+    m_vuMeterMain->setBounds(6, 103, 140, 8);
 
     initButton.reset (new juce::TextButton ("initButton"));
     addAndMakeVisible (initButton.get());
@@ -397,6 +397,12 @@ GlobalEditor::GlobalEditor ()
 
     tune->setBounds (190, 9, 34, 34);
 
+    m_vuMeterMain.reset (new VuMeterMain());
+    addAndMakeVisible (m_vuMeterMain.get());
+    m_vuMeterMain->setName ("id_vuMeterMain");
+
+    m_vuMeterMain->setBounds (6, 103, 150, 24);
+
 
     //[UserPreSize]
     //[/UserPreSize]
@@ -450,7 +456,6 @@ GlobalEditor::~GlobalEditor()
     algo = nullptr;
     lcdDisplay = nullptr;
     output = nullptr;
-    vuOutput = nullptr;
     initButton = nullptr;
     parmButton = nullptr;
     cartButton = nullptr;
@@ -460,7 +465,7 @@ GlobalEditor::~GlobalEditor()
     programSelector = nullptr;
     aboutButton = nullptr;
     tune = nullptr;
-
+    m_vuMeterMain = nullptr;
 
     //[Destructor]. You can add your own custom destruction code here..
     //[/Destructor]
@@ -730,8 +735,8 @@ void GlobalEditor::updatePitchPos(int pos) {
 }
 
 void GlobalEditor::updateVu(float f) {
-    vuOutput->v = f;
-    vuOutput->repaint();
+    m_vuMeterMain->v = f;
+    m_vuMeterMain->repaint();
     //midiMonitor->repaint();
 }
 
@@ -875,8 +880,6 @@ BEGIN_JUCER_METADATA
           explicitFocusOrder="0" pos="157 60 34 34" min="0.0" max="1.0"
           int="0.0" style="RotaryVerticalDrag" textBoxPos="NoTextBox" textBoxEditable="0"
           textBoxWidth="80" textBoxHeight="20" skewFactor="1.0" needsCallback="1"/>
-  <GENERICCOMPONENT name="vuOutput" id="dac75af912267f51" memberName="vuOutput" virtualName=""
-                    explicitFocusOrder="0" pos="6 103 140 8" class="VuMeter" params=""/>
   <TEXTBUTTON name="initButton" id="92b278163c42e21d" memberName="initButton"
               virtualName="" explicitFocusOrder="0" pos="100 111 50 30" buttonText="INIT"
               connectedEdges="0" needsCallback="1" radioGroupId="0"/>
@@ -908,6 +911,9 @@ BEGIN_JUCER_METADATA
           explicitFocusOrder="0" pos="190 9 34 34" min="0.0" max="1.0"
           int="0.0" style="RotaryVerticalDrag" textBoxPos="NoTextBox" textBoxEditable="0"
           textBoxWidth="80" textBoxHeight="20" skewFactor="1.0" needsCallback="1"/>
+  <GENERICCOMPONENT name="id_vuMeterMain" id="c18ba85c0a5c7198" memberName="m_vuMeterMain"
+                    virtualName="" explicitFocusOrder="0" pos="6 103 150 24"
+                    class="vuMeterMain" params=""/>
 </JUCER_COMPONENT>
 
 END_JUCER_METADATA

Source/GlobalEditor.h

@@ -7,7 +7,7 @@
   the "//[xyz]" and "//[/xyz]" sections will be retained when the file is loaded
   and re-saved.
 
-  Created with Projucer version: 6.0.7
+  Created with Projucer version: 7.0.7
 
   ------------------------------------------------------------------------------
 
@@ -105,7 +105,7 @@ class GlobalEditor  : public Component,
     std::unique_ptr<juce::Slider> algo;
     std::unique_ptr<LcdDisplay> lcdDisplay;
     std::unique_ptr<juce::Slider> output;
-    std::unique_ptr<VuMeter> vuOutput;
+    std::unique_ptr<VuMeterMain> m_vuMeterMain;
     std::unique_ptr<juce::TextButton> initButton;
     std::unique_ptr<juce::TextButton> parmButton;
     std::unique_ptr<juce::TextButton> cartButton;
@@ -117,6 +117,7 @@ class GlobalEditor  : public Component,
     std::unique_ptr<juce::Slider> tune;
 
 
+
     //==============================================================================
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (GlobalEditor)
 };

Source/PluginProcessor.cpp

@@ -34,6 +34,8 @@
 #include "msfa/aligned_buf.h"
 #include "msfa/fm_op_kernel.h"
 
+#include "DXComponents.h"
+
 #if JUCE_MSVC
     #pragma comment (lib, "kernel32.lib")
     #pragma comment (lib, "user32.lib")
@@ -293,9 +295,9 @@ void DexedAudioProcessor::processBlock(AudioSampleBuffer& buffer, MidiBuffer& mi
         float f = *channelDatap;
 
         // update VU meter
-        // The +1.0 outgoing sample value is scaled only to 0.8 on VU meter, 
-        // to values exceeding 0.8 on VU meter indicate clippings/distortions.
-        float s = std::abs(f * 0.8);
+        // The abs values of outgoing sample values are scaled to the end of the last yellow block on VU meter, 
+        // so outgoing abs values exceeding +1.0 will lie in the red region indicate clippings/distortions.
+        float s = std::abs(f * (VuMeterMain::VU_0dB));
         const double decayFactor = 0.99992;
         if (s > vuSignal)
             vuSignal = s;