Add ability to import metatiles from Advance Map (.bvd files)

src/core/metatileparser.cpp

@@ -0,0 +1,92 @@
+#include "metatileparser.h"
+#include "config.h"
+#include "log.h"
+#include "project.h"
+
+MetatileParser::MetatileParser()
+{
+
+}
+
+QList<Metatile*> *MetatileParser::parse(QString filepath, bool *error, bool primaryTileset)
+{
+    QFile file(filepath);
+    if (!file.open(QIODevice::ReadOnly)) {
+        *error = true;
+        logError(QString("Could not open Advance Map 1.92 Metatile .bvd file '%1': ").arg(filepath) + file.errorString());
+        return nullptr;
+    }
+
+    QByteArray in = file.readAll();
+    file.close();
+
+    if (in.length() < 9 || in.length() % 2 != 0) {
+        *error = true;
+        logError(QString("Advance Map 1.92 Metatile .bvd file '%1' is an unexpected size.").arg(filepath));
+        return nullptr;
+    }
+
+    int projIdOffset = in.length() - 4;
+    int metatileSize = 16;
+    int attrSize;
+    BaseGameVersion version;
+    if (in.at(projIdOffset + 0) == 'R'
+     && in.at(projIdOffset + 1) == 'S'
+     && in.at(projIdOffset + 2) == 'E'
+     && in.at(projIdOffset + 3) == ' ') {
+        // ruby and emerald are handled equally here.
+        version = BaseGameVersion::pokeemerald;
+        attrSize = 2;
+    } else {
+        *error = true;
+        logError(QString("Detected unsupported game type from .bvd file. Last 4 bytes of file must be 'RSE '."));
+        return nullptr;
+    }
+
+    int maxMetatiles = primaryTileset ? Project::getNumMetatilesPrimary() : Project::getNumMetatilesTotal() - Project::getNumMetatilesPrimary();
+    int numMetatiles = static_cast<unsigned char>(in.at(0)) |
+                                (static_cast<unsigned char>(in.at(1)) << 8) |
+                                (static_cast<unsigned char>(in.at(2)) << 16) |
+                                (static_cast<unsigned char>(in.at(3)) << 24);
+    if (numMetatiles > maxMetatiles) {
+        *error = true;
+        logError(QString(".bvd file contains data for %1 metatiles, but the maximum number of metatiles is %2.").arg(numMetatiles).arg(maxMetatiles));
+        return nullptr;
+    }
+    if (numMetatiles < 1) {
+        *error = true;
+        logError(QString(".bvd file contains no data for metatiles."));
+        return nullptr;
+    }
+
+    int expectedFileSize = 4 + (metatileSize * numMetatiles) + (attrSize * numMetatiles) + 4;
+    if (in.length() != expectedFileSize) {
+        *error = true;
+        logError(QString(".bvd file is an unexpected size. Expected %1 bytes, but it has %2 bytes.").arg(expectedFileSize).arg(in.length()));
+        return nullptr;
+    }
+
+    QList<Metatile*> *metatiles = new QList<Metatile*>();
+    for (int i = 0; i < numMetatiles; i++) {
+        Metatile *metatile = new Metatile();
+        QList<Tile> *tiles = new QList<Tile>();
+        for (int j = 0; j < 8; j++) {
+            int metatileOffset = 4 + i * metatileSize + j * 2;
+            uint16_t word = static_cast<uint16_t>(
+                        static_cast<unsigned char>(in.at(metatileOffset)) |
+                        (static_cast<unsigned char>(in.at(metatileOffset + 1)) << 8));
+            Tile tile(word & 0x3ff, (word >> 10) & 1, (word >> 11) & 1, (word >> 12) & 0xf);
+            tiles->append(tile);
+        }
+
+        int attrOffset = 4 + (numMetatiles * metatileSize) + (i * attrSize);
+        int value = static_cast<unsigned char>(in.at(attrOffset)) |
+                    (static_cast<unsigned char>(in.at(attrOffset + 1)) << 8);
+        metatile->behavior = value & 0xFF;
+        metatile->layerType = (value & 0xF000) >> 12;
+        metatile->tiles = tiles;
+        metatiles->append(metatile);
+    }
+
+    return metatiles;
+}

src/core/paletteparser.cpp

@@ -124,7 +124,7 @@ QList<QRgb> PaletteParser::parseAdvanceMapPal(QString filepath, bool *error) {
     QFile file(filepath);
     if (!file.open(QIODevice::ReadOnly)) {
         *error = true;
-        logError(QString("Could not open Advance Map palette file '%1': ").arg(filepath) + file.errorString());
+        logError(QString("Could not open Advance Map 1.92 palette file '%1': ").arg(filepath) + file.errorString());
         return QList<QRgb>();
     }
 
@@ -133,16 +133,16 @@ QList<QRgb> PaletteParser::parseAdvanceMapPal(QString filepath, bool *error) {
 
     if (in.length() % 4 != 0) {
         *error = true;
-        logError(QString("Advance Map palette file '%1' had an unexpected format. File's length must be a multiple of 4, but the length is %2.").arg(filepath).arg(in.length()));
+        logError(QString("Advance Map 1.92 palette file '%1' had an unexpected format. File's length must be a multiple of 4, but the length is %2.").arg(filepath).arg(in.length()));
         return QList<QRgb>();
     }
 
     QList<QRgb> palette;
     int i = 0;
     while (i < in.length()) {
-        unsigned char blue = static_cast<unsigned char>(in.at(i));
+        unsigned char red = static_cast<unsigned char>(in.at(i));
         unsigned char green = static_cast<unsigned char>(in.at(i + 1));
-        unsigned char red = static_cast<unsigned char>(in.at(i + 2));
+        unsigned char blue = static_cast<unsigned char>(in.at(i + 2));
         palette.append(qRgb(this->clampColorValue(red),
                             this->clampColorValue(green),
                             this->clampColorValue(blue)));

src/ui/tileseteditor.cpp

@@ -2,6 +2,7 @@
 #include "ui_tileseteditor.h"
 #include "log.h"
 #include "imageproviders.h"
+#include "metatileparser.h"
 #include "paletteparser.h"
 #include <QFileDialog>
 #include <QMessageBox>
@@ -626,3 +627,59 @@ void TilesetEditor::on_actionExport_Secondary_Tiles_Image_triggered()
         image.save(filepath);
     }
 }
+
+void TilesetEditor::on_actionImport_Primary_Metatiles_triggered()
+{
+    this->importTilesetMetatiles(this->primaryTileset, true);
+}
+
+void TilesetEditor::on_actionImport_Secondary_Metatiles_triggered()
+{
+    this->importTilesetMetatiles(this->secondaryTileset, false);
+}
+
+void TilesetEditor::importTilesetMetatiles(Tileset *tileset, bool primary)
+{
+    QString descriptor = primary ? "primary" : "secondary";
+    QString descriptorCaps = primary ? "Primary" : "Secondary";
+
+    QString filepath = QFileDialog::getOpenFileName(
+                this,
+                QString("Import %1 Tileset Metatiles from Advance Map 1.92").arg(descriptorCaps),
+                this->project->root,
+                "Advance Map 1.92 Metatile Files (*.bvd)");
+    if (filepath.isEmpty()) {
+        return;
+    }
+
+    MetatileParser parser;
+    bool error = false;
+    QList<Metatile*> *metatiles = parser.parse(filepath, &error, primary);
+    if (error) {
+        QMessageBox msgBox(this);
+        msgBox.setText("Failed to import metatiles from Advance Map 1.92 .bvd file.");
+        QString message = QString("The .bvd file could not be processed. View porymap.log for specific errors.");
+        msgBox.setInformativeText(message);
+        msgBox.setDefaultButton(QMessageBox::Ok);
+        msgBox.setIcon(QMessageBox::Icon::Critical);
+        msgBox.exec();
+        return;
+    }
+\
+    // TODO: This is crude because it makes a history entry for every newly-imported metatile.
+    //       Revisit this when tiles and num metatiles are added to tileset editory history.
+    int metatileIdBase = primary ? 0 : Project::getNumMetatilesPrimary();
+    for (int i = 0; i < metatiles->length(); i++) {
+        if (i >= tileset->metatiles->length()) {
+            break;
+        }
+
+        Metatile *prevMetatile = tileset->metatiles->at(i)->copy();
+        MetatileHistoryItem *commit = new MetatileHistoryItem(static_cast<uint16_t>(metatileIdBase + i), prevMetatile, metatiles->at(i)->copy());
+        metatileHistory.push(commit);
+    }
+
+    tileset->metatiles = metatiles;
+    this->refresh();
+    this->hasUnsavedChanges = true;
+}