SlipMode waveform visual for RGB GLSL

CMakeLists.txt

@@ -1502,6 +1502,7 @@ endif()
 if(QOPENGL)
   target_sources(mixxx-lib PRIVATE
     src/shaders/endoftrackshader.cpp
+    src/shaders/slipmodeshader.cpp
     src/shaders/patternshader.cpp
     src/shaders/rgbashader.cpp
     src/shaders/rgbshader.cpp
@@ -1515,6 +1516,7 @@ if(QOPENGL)
     src/waveform/renderers/allshader/waveformrenderbeat.cpp
     src/waveform/renderers/allshader/waveformrenderer.cpp
     src/waveform/renderers/allshader/waveformrendererendoftrack.cpp
+    src/waveform/renderers/allshader/waveformrendererslipmode.cpp
     src/waveform/renderers/allshader/waveformrendererfiltered.cpp
     src/waveform/renderers/allshader/waveformrendererhsv.cpp
     src/waveform/renderers/allshader/waveformrendererlrrgb.cpp

res/skins/Deere/deck_waveform.xml

@@ -30,6 +30,9 @@
         <BeatColor>#ffffff</BeatColor>
         <PlayPosColor>#00FF00</PlayPosColor>
         <EndOfTrackColor>#EA0000</EndOfTrackColor>
+        <SlipBorderOutlineColor>#f08c00</SlipBorderOutlineColor>
+        <SlipBorderTopOutlineSize>10</SlipBorderTopOutlineSize>
+        <SlipBorderBottomOutlineSize>10</SlipBorderBottomOutlineSize>
         <AxesColor></AxesColor>
         <Align></Align>
         <DefaultMark>

res/skins/LateNight/decks/overview.xml

@@ -18,6 +18,7 @@
     <PlayedOverlayColor><Variable name="PlayedOverlayColor"/></PlayedOverlayColor>
     <PlayPosColor><Variable name="PlayPosColor"/></PlayPosColor>
     <EndOfTrackColor><Variable name="EndOfTrackColor"/></EndOfTrackColor>
+    <SlipBorderOutlineColor><Variable name="SlipBorderOutlineColor"/></SlipBorderOutlineColor>
     <PassthroughLabelColor><Variable name="PassthroughLabelColor"/></PassthroughLabelColor>
     <LabelFontSize><Variable name="OverviewFontSize"/></LabelFontSize>
     <DimBrightThreshold><Variable name="DimBrightThresholdOverview"/></DimBrightThreshold>

res/skins/LateNight/skin.xml

@@ -172,6 +172,7 @@
       <SetVariable name="IntroOutroColor">#2c5c9a</SetVariable>
       <SetVariable name="PlayedOverlayColor">#dd151515</SetVariable>
       <SetVariable name="EndOfTrackColor">#f856e7</SetVariable>
+      <SetVariable name="SlipBorderOutlineColor">#f08c00</SetVariable>
       <SetVariable name="PassthroughLabelColor">#b24c12</SetVariable>
       <SetVariable name="OverviewFontSizeDeck">13</SetVariable>
       <SetVariable name="OverviewFontSizeDeckMini">11</SetVariable>
@@ -277,6 +278,7 @@
       <SetVariable name="IntroOutroColor">#0000ff</SetVariable>
       <SetVariable name="PlayedOverlayColor">#bb000000</SetVariable>
       <SetVariable name="EndOfTrackColor">#f856e7</SetVariable>
+      <SetVariable name="SlipBorderOutlineColor">#1af000</SetVariable>
       <SetVariable name="PassthroughLabelColor">#d09300</SetVariable>
       <SetVariable name="OverviewFontSizeDeck">13</SetVariable>
       <SetVariable name="OverviewFontSizeDeckMini">11</SetVariable>

res/skins/LateNight/waveform.xml

@@ -30,6 +30,9 @@
             <BeatHighlightColor></BeatHighlightColor>
             <PlayPosColor><Variable name="PlayPosColor"/></PlayPosColor>
             <EndOfTrackColor><Variable name="EndOfTrackColor"/></EndOfTrackColor>
+            <SlipBorderOutlineColor><Variable name="SlipBorderOutlineColor"/></SlipBorderOutlineColor>
+            <SlipBorderTopOutlineSize>10</SlipBorderTopOutlineSize>
+            <SlipBorderBottomOutlineSize>20</SlipBorderBottomOutlineSize>
             <PassthroughLabelColor><Variable name="PassthroughLabelColor"/></PassthroughLabelColor>
             <DimBrightThreshold><Variable name="DimBrightThresholdWaveform"/></DimBrightThreshold>
             <!--

res/skins/Tango/decks/overview.xml

@@ -26,6 +26,9 @@ Variables:
     <PlayPosColor>#FF4300</PlayPosColor>
     <PlayedOverlayColor><Variable name="PlayedOverlayColor"/></PlayedOverlayColor>
     <EndOfTrackColor><Variable name="EndOfTrackColor"/></EndOfTrackColor>
+    <SlipBorderOutlineColor><Variable name="SlipBorderOutlineColor"/></SlipBorderOutlineColor>
+    <SlipBorderTopOutlineSize><Variable name="SlipBorderTopOutlineSize"/></SlipBorderTopOutlineSize>
+    <SlipBorderBottomOutlineSize><Variable name="SlipBorderBottomOutlineSize"/></SlipBorderBottomOutlineSize>
     <LabelTextColor>#ffffff</LabelTextColor>
     <LabelBackgroundColor>#85000000</LabelBackgroundColor>
     <DefaultMark>

res/skins/Tango/waveform.xml

@@ -31,6 +31,9 @@ Variables:
         <BeatColor>#ffffff</BeatColor>
         <PlayPosColor>#FF4300</PlayPosColor>
         <EndOfTrackColor><Variable name="EndOfTrackColor"/></EndOfTrackColor>
+        <SlipBorderOutlineColor><Variable name="SlipBorderOutlineColor"/></SlipBorderOutlineColor>
+        <SlipBorderTopOutlineSize><Variable name="SlipBorderTopOutlineSize"/></SlipBorderTopOutlineSize>
+        <SlipBorderBottomOutlineSize><Variable name="SlipBorderBottomOutlineSize"/></SlipBorderBottomOutlineSize>
         <DefaultMark>
           <Align>bottom|right</Align>
           <Color>#666666</Color>

src/shaders/slipmodeshader.cpp

@@ -0,0 +1,60 @@
+#include "shaders/slipmodeshader.h"
+
+using namespace mixxx;
+
+void SlipModeShader::init() {
+    QString vertexShaderCode = QStringLiteral(R"--(
+#version 150
+attribute highp vec4 position; // use vec4 here (will be padded) to assign directly to gl_Position
+
+out highp vec4 vposition;
+
+void main()
+{
+    vposition = position;
+    gl_Position = position;
+}
+)--");
+
+    QString fragmentShaderCode = QStringLiteral(R"--(
+#version 120
+uniform highp vec4 color;
+uniform highp vec2 borders;
+uniform highp vec2 dimension;
+
+in highp vec4 vposition;
+
+void main()
+{
+
+    float xBorder = abs(dimension.x * vposition.x);
+    float yBorder = dimension.y * vposition.y;
+    float upperBoard = borders.x;
+    float lowerBoard = borders.y;
+
+    if (yBorder < 0){
+        float borderAlpha = max(
+            0, 
+            lowerBoard + yBorder
+        ) / lowerBoard;
+        gl_FragColor = vec4(color.xyz, mix(0, color.w, borderAlpha));
+
+    } else if( (xBorder > dimension.x - upperBoard && yBorder >= 0) || yBorder > dimension.y - upperBoard)
+    {
+        float borderAlpha = max(0, max(
+            yBorder - dimension.y, 
+            xBorder - dimension.x) + upperBoard) / upperBoard;
+        gl_FragColor = vec4(mix(vec3(0, 0, 0), color.rgb, min(color.w, borderAlpha)), 1);
+    } else {
+        gl_FragColor = vec4(0, 0, 0, 1);
+    }
+}
+)--");
+
+    load(vertexShaderCode, fragmentShaderCode);
+
+    m_positionLocation = attributeLocation("position");
+    m_boarderLocation = uniformLocation("borders");
+    m_dimensionLocation = uniformLocation("dimension");
+    m_colorLocation = uniformLocation("color");
+}

src/shaders/slipmodeshader.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "shaders/shader.h"
+
+namespace mixxx {
+class SlipModeShader;
+}
+
+class mixxx::SlipModeShader : public mixxx::Shader {
+  public:
+    SlipModeShader() = default;
+    ~SlipModeShader() = default;
+    void init();
+
+    int positionLocation() const {
+        return m_positionLocation;
+    }
+    int dimensionLocation() const {
+        return m_dimensionLocation;
+    }
+    int colorLocation() const {
+        return m_colorLocation;
+    }
+    int boarderLocation() const {
+        return m_boarderLocation;
+    }
+
+  private:
+    int m_positionLocation;
+    int m_dimensionLocation;
+    int m_colorLocation;
+    int m_boarderLocation;
+
+    DISALLOW_COPY_AND_ASSIGN(SlipModeShader)
+};

src/waveform/renderers/allshader/waveformrenderbeat.cpp

@@ -10,8 +10,10 @@
 
 namespace allshader {
 
-WaveformRenderBeat::WaveformRenderBeat(WaveformWidgetRenderer* waveformWidget)
-        : WaveformRenderer(waveformWidget) {
+WaveformRenderBeat::WaveformRenderBeat(WaveformWidgetRenderer* waveformWidget,
+        ::WaveformRendererAbstract::PositionSource type)
+        : WaveformRenderer(waveformWidget),
+          m_isSlipRenderer(type == ::WaveformRendererAbstract::Slip) {
 }
 
 void WaveformRenderBeat::initializeGL() {
@@ -27,10 +29,13 @@ void WaveformRenderBeat::setup(const QDomNode& node, const SkinContext& context)
 void WaveformRenderBeat::paintGL() {
     TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
 
-    if (!trackInfo) {
+    if (!trackInfo || (m_isSlipRenderer && !m_waveformRenderer->isSlipActive())) {
         return;
     }
 
+    auto positionType = m_isSlipRenderer ? ::WaveformRendererAbstract::Slip
+                                         : ::WaveformRendererAbstract::Play;
+
     mixxx::BeatsPointer trackBeats = trackInfo->getBeats();
     if (!trackBeats) {
         return;
@@ -54,9 +59,9 @@ void WaveformRenderBeat::paintGL() {
     }
 
     const double firstDisplayedPosition =
-            m_waveformRenderer->getFirstDisplayedPosition();
+            m_waveformRenderer->getFirstDisplayedPosition(positionType);
     const double lastDisplayedPosition =
-            m_waveformRenderer->getLastDisplayedPosition();
+            m_waveformRenderer->getLastDisplayedPosition(positionType);
 
     const auto startPosition = mixxx::audio::FramePos::fromEngineSamplePos(
             firstDisplayedPosition * trackSamples);
@@ -91,14 +96,18 @@ void WaveformRenderBeat::paintGL() {
             ++it) {
         double beatPosition = it->toEngineSamplePos();
         double xBeatPoint =
-                m_waveformRenderer->transformSamplePositionInRendererWorld(beatPosition);
+                m_waveformRenderer->transformSamplePositionInRendererWorld(
+                        beatPosition, positionType);
 
         xBeatPoint = qRound(xBeatPoint * devicePixelRatio) / devicePixelRatio;
 
         const float x1 = static_cast<float>(xBeatPoint);
         const float x2 = x1 + 1.f;
 
-        m_vertices.addRectangle(x1, 0.f, x2, rendererBreadth);
+        m_vertices.addRectangle(x1,
+                0.f,
+                x2,
+                m_isSlipRenderer ? rendererBreadth / 2 : rendererBreadth);
     }
 
     DEBUG_ASSERT(reserved == m_vertices.size());

src/waveform/renderers/allshader/waveformrenderbeat.h

@@ -16,7 +16,9 @@ class WaveformRenderBeat;
 
 class allshader::WaveformRenderBeat final : public allshader::WaveformRenderer {
   public:
-    explicit WaveformRenderBeat(WaveformWidgetRenderer* waveformWidget);
+    explicit WaveformRenderBeat(WaveformWidgetRenderer* waveformWidget,
+            ::WaveformRendererAbstract::PositionSource type =
+                    ::WaveformRendererAbstract::Play);
 
     void setup(const QDomNode& node, const SkinContext& context) override;
     void paintGL() override;
@@ -27,5 +29,7 @@ class allshader::WaveformRenderBeat final : public allshader::WaveformRenderer {
     QColor m_color;
     VertexData m_vertices;
 
+    bool m_isSlipRenderer;
+
     DISALLOW_COPY_AND_ASSIGN(WaveformRenderBeat);
 };

src/waveform/renderers/allshader/waveformrendererpreroll.cpp

@@ -59,8 +59,11 @@ QImage drawPrerollImage(float markerLength,
 
 namespace allshader {
 
-WaveformRendererPreroll::WaveformRendererPreroll(WaveformWidgetRenderer* waveformWidget)
-        : WaveformRenderer(waveformWidget) {
+WaveformRendererPreroll::WaveformRendererPreroll(
+        WaveformWidgetRenderer* waveformWidget,
+        ::WaveformRendererAbstract::PositionSource type)
+        : WaveformRenderer(waveformWidget),
+          m_isSlipRenderer(type == ::WaveformRendererAbstract::Slip) {
 }
 
 WaveformRendererPreroll::~WaveformRendererPreroll() = default;
@@ -78,12 +81,16 @@ void WaveformRendererPreroll::initializeGL() {
 
 void WaveformRendererPreroll::paintGL() {
     const TrackPointer track = m_waveformRenderer->getTrackInfo();
-    if (!track) {
+    if (!track || (m_isSlipRenderer && !m_waveformRenderer->isSlipActive())) {
         return;
     }
 
-    const double firstDisplayedPosition = m_waveformRenderer->getFirstDisplayedPosition();
-    const double lastDisplayedPosition = m_waveformRenderer->getLastDisplayedPosition();
+    auto positionType = m_isSlipRenderer ? ::WaveformRendererAbstract::Slip
+                                         : ::WaveformRendererAbstract::Play;
+
+    const double firstDisplayedPosition =
+            m_waveformRenderer->getFirstDisplayedPosition(positionType);
+    const double lastDisplayedPosition = m_waveformRenderer->getLastDisplayedPosition(positionType);
 
     // Check if the pre- or post-roll is on screen. If so, draw little triangles
     // to indicate the respective zones.
@@ -98,7 +105,7 @@ void WaveformRendererPreroll::paintGL() {
     const double vSamplesPerPixel = m_waveformRenderer->getVisualSamplePerPixel();
     const double numberOfVSamples = m_waveformRenderer->getLength() * vSamplesPerPixel;
 
-    const int currentVSamplePosition = m_waveformRenderer->getPlayPosVSample();
+    const int currentVSamplePosition = m_waveformRenderer->getPlayPosVSample(positionType);
     const int totalVSamples = m_waveformRenderer->getTotalVSample();
 
     const float markerBreadth = m_waveformRenderer->getBreadth() * 0.4f;
@@ -165,7 +172,7 @@ void WaveformRendererPreroll::paintGL() {
         drawPattern(x,
                 halfBreadth - halfMarkerBreadth,
                 0.f,
-                halfBreadth + halfMarkerBreadth,
+                m_isSlipRenderer ? halfBreadth : halfBreadth + halfMarkerBreadth,
                 x / markerLength);
     }
 
@@ -186,7 +193,7 @@ void WaveformRendererPreroll::paintGL() {
         drawPattern(x,
                 halfBreadth - halfMarkerBreadth,
                 end,
-                halfBreadth + halfMarkerBreadth,
+                m_isSlipRenderer ? halfBreadth : halfBreadth + halfMarkerBreadth,
                 (end - x) / markerLength);
     }
 
@@ -205,7 +212,14 @@ void WaveformRendererPreroll::drawPattern(
     const int texcoordLocation = m_shader.texcoordLocation();
 
     const std::array<float, 8> positionArray = {x1, y1, x2, y1, x1, y2, x2, y2};
-    const std::array<float, 8> texcoordArray = {0.f, 0.f, 1.f, 0.f, 0.f, 1.f, 1.f, 1.f};
+    const std::array<float, 8> texcoordArray = {0.f,
+            0.f,
+            1.f,
+            0.f,
+            0.f,
+            m_isSlipRenderer ? 0.5f : 1.f,
+            1.f,
+            m_isSlipRenderer ? 0.5f : 1.f};
     m_shader.setUniformValue(repetitionsLocation, QVector2D(repetitions, 1.0));
 
     m_shader.setAttributeArray(

src/waveform/renderers/allshader/waveformrendererpreroll.h

@@ -16,11 +16,15 @@ class QOpenGLTexture;
 
 namespace allshader {
 class WaveformRendererPreroll;
+class WaveformRendererSlipPreroll;
 }
 
-class allshader::WaveformRendererPreroll final : public allshader::WaveformRenderer {
+class allshader::WaveformRendererPreroll : public allshader::WaveformRenderer {
   public:
-    explicit WaveformRendererPreroll(WaveformWidgetRenderer* waveformWidgetRenderer);
+    explicit WaveformRendererPreroll(
+            WaveformWidgetRenderer* waveformWidgetRenderer,
+            ::WaveformRendererAbstract::PositionSource type =
+                    ::WaveformRendererAbstract::Play);
     ~WaveformRendererPreroll() override;
 
     void setup(const QDomNode& node, const SkinContext& context) override;
@@ -36,5 +40,7 @@ class allshader::WaveformRendererPreroll final : public allshader::WaveformRende
     float m_markerLength{};
     OpenGLTexture2D m_texture;
 
+    bool m_isSlipRenderer;
+
     DISALLOW_COPY_AND_ASSIGN(WaveformRendererPreroll);
 };