Add image export for metatileset

forms/tileseteditor.ui

@@ -562,6 +562,8 @@
     <addaction name="separator"/>
     <addaction name="actionExport_Primary_Tiles_Image"/>
     <addaction name="actionExport_Secondary_Tiles_Image"/>
+    <addaction name="actionExport_Primary_Metatiles_Image"/>
+    <addaction name="actionExport_Secondary_Metatiles_Image"/>
    </widget>
    <widget class="QMenu" name="menuEdit">
     <property name="title">
@@ -666,6 +668,16 @@
     <string>Import Secondary Metatiles from Advance Map 1.92...</string>
    </property>
   </action>
+  <action name="actionExport_Primary_Metatiles_Image">
+   <property name="text">
+    <string>Export Primary Metatiles Image...</string>
+   </property>
+  </action>
+  <action name="actionExport_Secondary_Metatiles_Image">
+   <property name="text">
+    <string>Export Secondary Metatiles Image...</string>
+   </property>
+  </action>
   <action name="actionCut">
    <property name="text">
     <string>Cut</string>

include/ui/tileseteditor.h

@@ -96,11 +96,11 @@ private slots:
     void on_comboBox_terrainType_activated(int arg1);
 
     void on_actionExport_Primary_Tiles_Image_triggered();
-
     void on_actionExport_Secondary_Tiles_Image_triggered();
+    void on_actionExport_Primary_Metatiles_Image_triggered();
+    void on_actionExport_Secondary_Metatiles_Image_triggered();
 
     void on_actionImport_Primary_Metatiles_triggered();
-
     void on_actionImport_Secondary_Metatiles_triggered();
 
     void on_copyButton_metatileLabel_clicked();

include/ui/tileseteditormetatileselector.h

@@ -16,6 +16,8 @@ public:
     uint16_t getSelectedMetatileId();
     void updateSelectedMetatile();
     QPoint getMetatileIdCoordsOnWidget(uint16_t metatileId);
+    QImage buildPrimaryMetatilesImage();
+    QImage buildSecondaryMetatilesImage();
 
     QVector<uint16_t> usedMetatiles;
     bool selectorShowUnused = false;
@@ -40,6 +42,8 @@ private:
     void drawFilters();
     void drawUnused();
     void drawCounts();
+    QImage buildAllMetatilesImage();
+    QImage buildImage(int metatileIdStart, int metatileIdEnd);
 
 signals:
     void hoveredMetatileChanged(uint16_t);

src/ui/tileseteditor.cpp

@@ -902,6 +902,28 @@ void TilesetEditor::on_actionExport_Secondary_Tiles_Image_triggered()
     }
 }
 
+void TilesetEditor::on_actionExport_Primary_Metatiles_Image_triggered()
+{
+    QString defaultName = QString("%1_Metatiles").arg(this->primaryTileset->name);
+    QString defaultFilepath = QString("%1/%2.png").arg(this->project->root).arg(defaultName);
+    QString filepath = QFileDialog::getSaveFileName(this, "Export Primary Metatiles Image", defaultFilepath, "Image Files (*.png)");
+    if (!filepath.isEmpty()) {
+        QImage image = this->metatileSelector->buildPrimaryMetatilesImage();
+        image.save(filepath, "PNG");
+    }
+}
+
+void TilesetEditor::on_actionExport_Secondary_Metatiles_Image_triggered()
+{
+    QString defaultName = QString("%1_Metatiles").arg(this->secondaryTileset->name);
+    QString defaultFilepath = QString("%1/%2.png").arg(this->project->root).arg(defaultName);
+    QString filepath = QFileDialog::getSaveFileName(this, "Export Secondary Metatiles Image", defaultFilepath, "Image Files (*.png)");
+    if (!filepath.isEmpty()) {
+        QImage image = this->metatileSelector->buildSecondaryMetatilesImage();
+        image.save(filepath, "PNG");
+    }
+}
+
 void TilesetEditor::on_actionImport_Primary_Metatiles_triggered()
 {
     this->importTilesetMetatiles(this->primaryTileset, true);

src/ui/tileseteditormetatileselector.cpp

@@ -12,27 +12,32 @@ TilesetEditorMetatileSelector::TilesetEditorMetatileSelector(Tileset *primaryTil
     this->usedMetatiles.resize(Project::getNumMetatilesTotal());
 }
 
-void TilesetEditorMetatileSelector::draw() {
+QImage TilesetEditorMetatileSelector::buildAllMetatilesImage() {
-    if (!this->primaryTileset || !this->secondaryTileset) {
+    return this->buildImage(0, Project::getNumMetatilesPrimary() + this->secondaryTileset->metatiles.length() - 1);
-        this->setPixmap(QPixmap());
+}
-    }
 
-    int primaryLength = this->primaryTileset->metatiles.length();
+QImage TilesetEditorMetatileSelector::buildPrimaryMetatilesImage() {
-    int length_ = primaryLength + this->secondaryTileset->metatiles.length();
+    return this->buildImage(0, this->primaryTileset->metatiles.length() - 1);
-    int height_ = length_ / this->numMetatilesWide;
+}
-    if (length_ % this->numMetatilesWide != 0) {
+
-        height_++;
+QImage TilesetEditorMetatileSelector::buildSecondaryMetatilesImage() {
+    int numPrimary = Project::getNumMetatilesPrimary();
+    return this->buildImage(numPrimary, numPrimary + this->secondaryTileset->metatiles.length() - 1);
+}
+
+QImage TilesetEditorMetatileSelector::buildImage(int metatileIdStart, int metatileIdEnd) {
+    int totalMetatiles = metatileIdEnd - metatileIdStart + 1;
+    int numMetatilesHigh = totalMetatiles / this->numMetatilesWide;
+    if (totalMetatiles % this->numMetatilesWide != 0) {
+        // Round up height for incomplete last row
+        numMetatilesHigh++;
     }
-    QImage image(this->numMetatilesWide * 32, height_ * 32, QImage::Format_RGBA8888);
+    QImage image(this->numMetatilesWide * 32, numMetatilesHigh * 32, QImage::Format_RGBA8888);
     image.fill(Qt::magenta);
     QPainter painter(&image);
-    for (int i = 0; i < length_; i++) {
+    for (int i = 0; i < totalMetatiles; i++) {
-        int tile = i;
-        if (i >= primaryLength) {
-            tile += Project::getNumMetatilesPrimary() - primaryLength;
-        }
         QImage metatile_image = getMetatileImage(
-                    tile,
+                    i + metatileIdStart,
                     this->primaryTileset,
                     this->secondaryTileset,
                     map->metatileLayerOrder,
@@ -44,9 +49,15 @@ void TilesetEditorMetatileSelector::draw() {
         QPoint metatile_origin = QPoint(map_x * 32, map_y * 32);
         painter.drawImage(metatile_origin, metatile_image);
     }
-
     painter.end();
-    this->setPixmap(QPixmap::fromImage(image));
+    return image;
+}
+
+void TilesetEditorMetatileSelector::draw() {
+    if (!this->primaryTileset || !this->secondaryTileset) {
+        this->setPixmap(QPixmap());
+    }
+    this->setPixmap(QPixmap::fromImage(this->buildAllMetatilesImage()));
     this->drawSelection();
 
     drawFilters();