gowin: Add GUI.

* Items such as LUT, DFF, MUX, ALU, IOB are displayed;
* Local wires, 1-2-4-8 wires are displayed;
* The clock spines, taps and branches are displayed with some caveats.

For now, you can not create a project in the GUI because of possible
conflict with another PR (about GW1NR-9C support), but you can specify
the board in the command line and load .JSON and .CST in the GUI.

Although ALUs are displayed, but the CIN and COUT wires are not. This is
still an unsolved problem.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>

4 files changed, 72 insertions, 3 deletions

diff --git a/gui/gowin/mainwindow.cc b/gui/gowin/mainwindow.cc
index 9dafcef5..c7ba44ab 100644
--- a/gui/gowin/mainwindow.cc
+++ b/gui/gowin/mainwindow.cc
@@ -19,9 +19,12 @@
 

 #include "mainwindow.h"

 

+#include <QFileDialog>

 #include <QMessageBox>

 #include <cstdlib>

 

+#include "cst.h"

+

 static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }

 

 NEXTPNR_NAMESPACE_BEGIN

@@ -30,8 +33,10 @@ MainWindow::MainWindow(std::unique_ptr<Context> context, CommandHandler *handler
         : BaseMainWindow(std::move(context), handler, parent)

 {

     initMainResource();

-    QMessageBox::critical(0, "Error - FIXME", "No GUI support for nextpnr-gowin");

-    std::exit(1);

+    std::string title = "nextpnr-gowin - [EMPTY]";

+    setWindowTitle(title.c_str());

+    connect(this, &BaseMainWindow::contextChanged, this, &MainWindow::newContext);

+    createMenu();

 }

 

 MainWindow::~MainWindow() {}

@@ -42,8 +47,57 @@ void MainWindow::newContext(Context *ctx)
     setWindowTitle(title.c_str());

 }

 

-void MainWindow::createMenu() {}

+void MainWindow::load_cst(std::string filename)

+{

+    disableActions();

+    std::ifstream f(filename);

+    if (read_cst(ctx.get(), f)) {

+        log("Loading CST successful.\n");

+        actionPack->setEnabled(true);

+    } else {

+        actionLoadCST->setEnabled(true);

+        log("Loading CST failed.\n");

+    }

+}

+

+void MainWindow::createMenu()

+{

+    actionLoadCST = new QAction("Open CST", this);

+    actionLoadCST->setIcon(QIcon(":/icons/resources/open_cst.png"));

+    actionLoadCST->setStatusTip("Open CST file");

+    actionLoadCST->setEnabled(false);

+    connect(actionLoadCST, &QAction::triggered, this, &MainWindow::open_cst);

+

+    // Add actions in menus

+    mainActionBar->addSeparator();

+    mainActionBar->addAction(actionLoadCST);

+

+    menuDesign->addSeparator();

+    menuDesign->addAction(actionLoadCST);

+}

 

 void MainWindow::new_proj() {}

 

+void MainWindow::open_cst()

+{

+    QString fileName = QFileDialog::getOpenFileName(this, QString("Open CST"), QString(), QString("*.cst"));

+    if (!fileName.isEmpty()) {

+        load_cst(fileName.toStdString());

+    }

+}

+

+void MainWindow::onDisableActions() { actionLoadCST->setEnabled(false); }

+

+void MainWindow::onUpdateActions()

+{

+    if (ctx->settings.find(ctx->id("synth")) != ctx->settings.end()) {

+        actionLoadCST->setEnabled(true);

+    }

+    if (ctx->settings.find(ctx->id("cst")) != ctx->settings.end()) {

+        actionLoadCST->setEnabled(false);

+    }

+    if (ctx->settings.find(ctx->id("pack")) != ctx->settings.end()) {

+        actionLoadCST->setEnabled(false);

+    }

+}

 NEXTPNR_NAMESPACE_END

diff --git a/gui/gowin/mainwindow.h b/gui/gowin/mainwindow.h
index 1e39b63f..0d65ed1c 100644
--- a/gui/gowin/mainwindow.h
+++ b/gui/gowin/mainwindow.h
@@ -35,9 +35,21 @@ class MainWindow : public BaseMainWindow
   public:

     void createMenu();

 

+  protected:

+    void onDisableActions() override;

+    void onUpdateActions() override;

+

+    void load_cst(std::string filename);

+

   protected Q_SLOTS:

     void new_proj() override;

+

+    void open_cst();

+

     void newContext(Context *ctx);

+

+  private:

+    QAction *actionLoadCST;

 };

 

 NEXTPNR_NAMESPACE_END

diff --git a/gui/gowin/nextpnr.qrc b/gui/gowin/nextpnr.qrc
index 03585ec0..921cfdd1 100644
--- a/gui/gowin/nextpnr.qrc
+++ b/gui/gowin/nextpnr.qrc
@@ -1,2 +1,5 @@
 <RCC>
+    <qresource prefix="/icons">
+        <file>resources/open_cst.png</file>
+    </qresource>
 </RCC>
diff --git a/gui/gowin/resources/open_cst.png b/gui/gowin/resources/open_cst.png
new file mode 100644
index 00000000..23fe9cf8
--- /dev/null
+++ b/gui/gowin/resources/open_cst.png