typesetter: extra draw call by line number

FontTestGDX/src/FontTestGDX.kt

@@ -41,9 +41,13 @@ class FontTestGDX : Game() {
 
     lateinit var layout: MovableType
 
+    private lateinit var testtex: TextureRegion
+
     override fun create() {
         font = TerrarumSansBitmap("./assets", debug = true, flipY = false, errorOnUnknownChar = false, shadowAlpha = 0.5f) // must test for two flipY cases
 
+        testtex = TextureRegion(Texture("./testtex.tga"))
+
         val inTextFile = Gdx.files.internal("./$demotextName")
         val reader = inTextFile.reader("UTF-8")
         inputText = reader.readLines().joinToString("\n")
@@ -108,7 +112,14 @@ class FontTestGDX : Game() {
 //            inputText.forEachIndexed { index, s ->
 //                font.draw(batch, s, 10f, TEXH - 30f - index * lineHeight)
 //            }
-            layout.draw(batch, 24f, 12f)
+
+            // draw position debuggers
+//            font.draw(batch, "soft\uFE0F\u00ADhyphen\uFE0F\u00ADated", 24f, 12f)
+//            batch.draw(testtex, 24f, 12f)
+            // end of draw position debuggers
+
+            val layoutDrawCall = { x: Float, y: Float, _: Int -> batch.draw(testtex, x, y) }
+            layout.draw(batch, 24f, 12f, mapOf(0 to layoutDrawCall))
 
             batch.end()
 
@@ -160,6 +171,7 @@ class FontTestGDX : Game() {
     override fun dispose() {
         font.dispose()
         faketex.dispose()
+        testtex.texture.dispose()
     }
 
     fun scrollAdd(x: Int = 1) {
@@ -321,7 +333,7 @@ class FlippingSpriteBatch(size: Int = 1000) : SpriteBatch(size) {
 
 lateinit var appConfig: Lwjgl3ApplicationConfiguration
 const val TEXW = 800
-const val TEXH = 24 * 130
+const val TEXH = 24 * 170
 
 const val WIDTH = TEXW
 const val HEIGHT = 768

src/net/torvald/terrarumsansbitmap/MovableType.kt

@@ -243,17 +243,31 @@ class MovableType(
     } }
 
 
-    fun draw(batch: Batch, x: Int, y: Int, lineStart: Int = 0, linesToDraw: Int = -1, lineHeight: Int = 24) =
-        draw(batch, x.toFloat(), y.toFloat(), lineStart, linesToDraw, lineHeight)
+    fun draw(batch: Batch, x: Int, y: Int, lineStart: Int = 0, linesToDraw: Int = -1, lineHeight: Int = TerrarumSansBitmap.LINE_HEIGHT, drawJobs: Map<Int, (Float, Float, Int) -> Unit> = HashMap()) =
+        draw(batch, x.toFloat(), y.toFloat(), lineStart, linesToDraw, lineHeight, drawJobs)
 
-    fun draw(batch: Batch, x: Float, y: Float, lineStart: Int = 0, linesToDraw: Int = 2147483647, lineHeight: Int = 24) {
+    fun draw(batch: Batch, x: Int, y: Int, drawJobs: Map<Int, (Float, Float, Int) -> Unit> = HashMap()) =
+        draw(batch, x.toFloat(), y.toFloat(), 0, 2147483647, TerrarumSansBitmap.LINE_HEIGHT, drawJobs)
+
+    fun draw(batch: Batch, x: Float, y: Float, drawJobs: Map<Int, (Float, Float, Int) -> Unit> = HashMap()) =
+        draw(batch, x, y, 0, 2147483647, TerrarumSansBitmap.LINE_HEIGHT, drawJobs)
+
+    /**
+     * @param drawJobs Draw call for specific lines (absolute line). This takes the form of Map from linnumber to draw function,
+     * which has three arguments: (line's top-left position-x, line's top-left position-y, absolute line number)
+     */
+    fun draw(batch: Batch, x: Float, y: Float, lineStart: Int = 0, linesToDraw: Int = 2147483647, lineHeight: Int = TerrarumSansBitmap.LINE_HEIGHT, drawJobs: Map<Int, (Float, Float, Int) -> Unit> = HashMap()) {
         if (isNull) return
 
         typesettedSlugs.subList(lineStart, minOf(typesettedSlugs.size, lineStart + linesToDraw)).forEachIndexed { lineNum, lineBlocks ->
 //            println("Line [${lineNum+1}] anchors: "+ lineBlocks.map { it.posX }.joinToString())
 
+            val absoluteLineNum = lineStart + lineNum
+
+            drawJobs[absoluteLineNum]?.invoke(x, y + lineNum * lineHeight, absoluteLineNum)
+
             lineBlocks.forEach {
-                batch.draw(it.block.glyphLayout!!.linotype, x + it.posX - 16, y + lineNum * lineHeight)
+                batch.draw(it.block.glyphLayout!!.linotype, x + it.posX - 16, y + lineNum * lineHeight - 8)
             }
 
 //            font.draw(batch, "I", x, y + lineNum * lineHeight + 14)

src/net/torvald/terrarumsansbitmap/gdx/TerrarumSansBitmap.kt

@@ -305,7 +305,7 @@ class TerrarumSansBitmap(
         glyphProps[0] = GlyphProps(0)
     }
 
-    override fun getLineHeight(): Float = 24f * scale
+    override fun getLineHeight(): Float = LINE_HEIGHT.toFloat() * scale
     override fun getXHeight() = 8f * scale
     override fun getCapHeight() = 12f * scale
     override fun getAscent() = 3f * scale
@@ -2040,6 +2040,8 @@ class TerrarumSansBitmap(
 
     companion object {
 
+        const val LINE_HEIGHT = 24
+
         fun CodepointSequence.getHash(): Long {
             val hashBasis = -3750763034362895579L
             val hashPrime = 1099511628211L