Adjust graphics from j3270 changes

.gitignore

@@ -9,3 +9,4 @@ captures/
 .cxx
 *.jar
 !gradle/wrapper/gradle-wrapper.jar
+*.txt

build.sh

@@ -46,7 +46,7 @@ if [ ! -d "$J3270_PATH/lib3270j" ]; then
 fi
 
 echo "Building debug APK..."
-./gradlew assembleDebug
+./gradlew assembleDebug --no-daemon
 
 APK_PATH="$SCRIPT_DIR/build/outputs/apk/debug/a3270-debug.apk"
 if [ -f "$APK_PATH" ]; then

src/main/java/haus/nightmare/a3270/graphics/AndroidCanvasRenderer.kt

@@ -0,0 +1,49 @@
+package haus.nightmare.a3270.graphics
+
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.RectF
+import haus.nightmare.lib3270j.graphics.PixelBuffer
+
+/**
+ * Android bridge for translating lib3270j PixelBuffer into Android Bitmaps and rendering onto Canvas.
+ */
+object AndroidCanvasRenderer {
+
+    /**
+     * Converts a PixelBuffer into an Android Bitmap using ARGB_8888 configuration.
+     */
+    fun toBitmap(buffer: PixelBuffer?): Bitmap? {
+        if (buffer == null) return null
+        val w = buffer.width
+        val h = buffer.height
+        if (w <= 0 || h <= 0) return null
+        val pixels = buffer.pixels ?: return null
+        return Bitmap.createBitmap(pixels, w, h, Bitmap.Config.ARGB_8888)
+    }
+
+    /**
+     * Draws the given PixelBuffer onto an Android Canvas scaled to the destination rectangle.
+     */
+    fun drawPixelBuffer(
+        canvas: Canvas,
+        buffer: PixelBuffer?,
+        dstRect: RectF,
+        paint: Paint? = null
+    ) {
+        val bmp = toBitmap(buffer) ?: return
+        canvas.drawBitmap(bmp, null, dstRect, paint)
+    }
+
+    /**
+     * Copies the PixelBuffer contents into an existing mutable Bitmap.
+     */
+    fun copyIntoBitmap(buffer: PixelBuffer, target: Bitmap) {
+        val pixels = buffer.pixels ?: return
+        val w = minOf(buffer.width, target.width)
+        val h = minOf(buffer.height, target.height)
+        if (w <= 0 || h <= 0) return
+        target.setPixels(pixels, 0, buffer.width, 0, 0, w, h)
+    }
+}