Support MSAA in the picture debugger

Add radio buttons for setting the GL sample count to 0 ("off"), 4 or
16.

Change the default mode of the GL widget to MSAA4. Previous behavior
corresponded to "off".

BUG=1459
R=robertphillips@google.com

Author: kkinnunen@nvidia.com

Review URL: https://chromiumcodereview.appspot.com/21752002

git-svn-id: http://skia.googlecode.com/svn/trunk@10509 2bbb7eff-a529-9590-31e7-b0007b416f81

debugger/QT/SkCanvasWidget.cpp

@@ -129,6 +129,13 @@ void SkCanvasWidget::setWidgetVisibility(WidgetType type, bool isHidden) {
 #endif
 }
 
+#if SK_SUPPORT_GPU
+void SkCanvasWidget::setGLSampleCount(int sampleCount)
+{
+    fGLWidget.setSampleCount(sampleCount);
+}
+#endif
+
 void SkCanvasWidget::zoom(float scale, int px, int py) {
     fUserMatrix.postScale(scale, scale, px, py);
     emit scaleFactorChanged(fUserMatrix.getScaleX());

debugger/QT/SkCanvasWidget.h

@@ -36,6 +36,10 @@ public:
 
     void setWidgetVisibility(WidgetType type, bool isHidden);
 
+#if SK_SUPPORT_GPU
+    void setGLSampleCount(int sampleCount);
+#endif
+
     /** Zooms the canvas by scale with the transformation centered at the widget point (px, py). */
     void zoom(float scale, int px, int py);
 

debugger/QT/SkDebuggerGUI.cpp

@@ -92,7 +92,7 @@ SkDebuggerGUI::SkDebuggerGUI(QWidget *parent) :
     connect(&fActionClose, SIGNAL(triggered()), this, SLOT(actionClose()));
     connect(fSettingsWidget.getVisibilityButton(), SIGNAL(toggled(bool)), this, SLOT(actionCommandFilter()));
 #if SK_SUPPORT_GPU
-    connect(fSettingsWidget.getGLCheckBox(), SIGNAL(toggled(bool)), this, SLOT(actionGLWidget(bool)));
+    connect(&fSettingsWidget, SIGNAL(glSettingsChanged()), this, SLOT(actionGLWidget()));
 #endif
     connect(fSettingsWidget.getRasterCheckBox(), SIGNAL(toggled(bool)), this, SLOT(actionRasterWidget(bool)));
     connect(fSettingsWidget.getOverdrawVizCheckBox(), SIGNAL(toggled(bool)), this, SLOT(actionOverdrawVizWidget(bool)));
@@ -360,8 +360,9 @@ void SkDebuggerGUI::actionProfile() {
     renderer = SkNEW(sk_tools::SimplePictureRenderer);
 
 #if SK_SUPPORT_GPU
-    if (Qt::Checked == fSettingsWidget.getGLCheckBox()->checkState()) {
+    if (fSettingsWidget.isGLActive()) {
         renderer->setDeviceType(sk_tools::PictureRenderer::kGPU_DeviceType);
+        renderer->setSampleCount(fSettingsWidget.getGLSampleCount());
     }
 #endif
 
@@ -459,7 +460,11 @@ void SkDebuggerGUI::actionDelete() {
 }
 
 #if SK_SUPPORT_GPU
-void SkDebuggerGUI::actionGLWidget(bool isToggled) {
+void SkDebuggerGUI::actionGLWidget() {
+    bool isToggled = fSettingsWidget.isGLActive();
+    if (isToggled) {
+        fCanvasWidget.setGLSampleCount(fSettingsWidget.getGLSampleCount());
+    }
     fCanvasWidget.setWidgetVisibility(SkCanvasWidget::kGPU_WidgetType, !isToggled);
 }
 #endif

debugger/QT/SkDebuggerGUI.h

@@ -114,9 +114,9 @@ private slots:
 
 #if SK_SUPPORT_GPU
     /**
-        Toggles the visibility of the GL canvas widget.
+        Updates the visibility of the GL canvas widget and sample count of the GL surface.
      */
-    void actionGLWidget(bool isToggled);
+    void actionGLWidget();
 #endif
 
     /**

debugger/QT/SkGLWidget.cpp

@@ -27,6 +27,14 @@ SkGLWidget::~SkGLWidget() {
     SkSafeUnref(fCanvas);
 }
 
+void SkGLWidget::setSampleCount(int sampleCount)
+{
+    QGLFormat currentFormat = format();
+    currentFormat.setSampleBuffers(sampleCount > 0);
+    currentFormat.setSamples(sampleCount);
+    setFormat(currentFormat);
+}
+
 void SkGLWidget::initializeGL() {
     fCurIntf = GrGLCreateNativeInterface();
     if (!fCurIntf) {

debugger/QT/SkGLWidget.h

@@ -33,6 +33,7 @@ public:
     void draw() {
         this->updateGL();
     }
+    void setSampleCount(int sampleCount);
 
 signals:
     void drawComplete();

debugger/QT/SkSettingsWidget.cpp

@@ -67,6 +67,28 @@ SkSettingsWidget::SkSettingsWidget() : QWidget()
     fGLLabel.setText("OpenGL: ");
     fGLLabel.setMinimumWidth(178);
     fGLLabel.setMaximumWidth(178);
+
+    fGLMSAAButtonGroup.setTitle("MSAA");
+    fGLMSAAButtonGroup.setMinimumWidth(178);
+    fGLMSAAButtonGroup.setMaximumWidth(178);
+    fGLMSAAButtonGroup.setEnabled(fGLCheckBox.isChecked());
+
+    fGLMSAAOff.setText("Off");
+    fGLMSAA4On.setText("4");
+    fGLMSAA4On.setChecked(true);
+    fGLMSAA16On.setText("16");
+
+    fGLMSAALayout.addWidget(&fGLMSAAOff);
+    fGLMSAALayout.addWidget(&fGLMSAA4On);
+    fGLMSAALayout.addWidget(&fGLMSAA16On);
+
+    fGLMSAAButtonGroup.setLayout(&fGLMSAALayout);
+
+    connect(&fGLCheckBox, SIGNAL(toggled(bool)), &fGLMSAAButtonGroup, SLOT(setEnabled(bool)));
+    connect(&fGLCheckBox, SIGNAL(toggled(bool)), this, SIGNAL(glSettingsChanged()));
+    connect(&fGLMSAAOff, SIGNAL(toggled(bool)), this, SIGNAL(glSettingsChanged()));
+    connect(&fGLMSAA4On, SIGNAL(toggled(bool)), this, SIGNAL(glSettingsChanged()));
+    connect(&fGLMSAA16On, SIGNAL(toggled(bool)), this, SIGNAL(glSettingsChanged()));
 #endif
 
     fRasterLayout.addWidget(&fRasterLabel);
@@ -86,6 +108,7 @@ SkSettingsWidget::SkSettingsWidget() : QWidget()
     fCanvasLayout.addLayout(&fOverdrawVizLayout);
 #if SK_SUPPORT_GPU
     fCanvasLayout.addLayout(&fGLLayout);
+    fCanvasLayout.addWidget(&fGLMSAAButtonGroup);
 #endif
 
     // Command Toggle

debugger/QT/SkSettingsWidget.h

@@ -14,6 +14,7 @@
 #include <QHBoxLayout>
 #include <QTextEdit>
 #include <QFrame>
+#include <QGroupBox>
 #include <QLabel>
 #include <QRadioButton>
 #include <QCheckBox>
@@ -40,9 +41,19 @@ public:
     QRadioButton* getVisibilityButton();
 
 #if SK_SUPPORT_GPU
-    QCheckBox* getGLCheckBox() {
-        return &fGLCheckBox;
+    bool isGLActive() {
+        return fGLCheckBox.isChecked();
     }
+
+    int getGLSampleCount() {
+        if (fGLMSAA4On.isChecked()) {
+            return 4;
+        } else if (fGLMSAA16On.isChecked()) {
+            return 16;
+        }
+        return 0;
+    }
+
 #endif
 
     QCheckBox* getRasterCheckBox() {
@@ -61,6 +72,9 @@ signals:
     void scrollingPreferences(bool isStickyActivate);
     void showStyle(bool isSingleCommand);
     void visibilityFilter(bool isEnabled);
+#if SK_SUPPORT_GPU
+    void glSettingsChanged();
+#endif
 
 private:
     QVBoxLayout mainFrameLayout;
@@ -101,6 +115,11 @@ private:
     QHBoxLayout fGLLayout;
     QLabel fGLLabel;
     QCheckBox fGLCheckBox;
+    QGroupBox fGLMSAAButtonGroup;
+    QVBoxLayout fGLMSAALayout;
+    QRadioButton fGLMSAAOff;
+    QRadioButton fGLMSAA4On;
+    QRadioButton fGLMSAA16On;
 #endif
 
     QFrame fZoomFrame;