112 lines
3.1 KiB
Dart
112 lines
3.1 KiB
Dart
import 'dart:ui' as ui;
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import 'dart:ui';
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import 'package:dartterm/assets.dart';
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import 'package:dartterm/fonts.dart';
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import 'package:dartterm/terminal.dart';
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import 'package:flutter/material.dart';
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class TerminalCustomPainter extends CustomPainter {
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Terminal t;
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double scalingFactor;
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static const int cellW = 8;
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static const int cellH = 8;
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TerminalCustomPainter(this.t, this.scalingFactor);
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@override
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bool shouldRepaint(TerminalCustomPainter oldDelegate) {
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return true;
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}
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@override
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void paint(Canvas canvas, Size size) {
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var pr = PictureRecorder();
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var smallSize = Size((cellW * Terminal.width).toDouble(),
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(cellH * Terminal.height).toDouble());
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var virtualCanvas = Canvas(pr, const Offset(0, 0) & smallSize);
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virtualPaint(virtualCanvas, smallSize);
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var image = pr
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.endRecording()
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// Renderer does something bizarre if I don't multiply by something greater than 1
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.toImageSync(cellW * Terminal.width * 2, cellH * Terminal.height * 2);
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canvas.drawImageRect(image, const Offset(0, 0) & smallSize,
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const Offset(0, 0) & size, Paint()..filterQuality = FilterQuality.none);
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}
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void virtualPaint(Canvas canvas, Size size) {
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final paint = Paint();
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var todos = Todos();
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// == Draw the background and foreground of every tile ==
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for (var i = 0; i < nTiles; i++) {
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final (pcxDst, pcyDst) = t.toXY(i) ?? (0, 0);
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final (pxDst, pyDst) = (pcxDst * cellW, pcyDst * cellH);
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final rectDst = Rect.fromLTWH(pxDst.toDouble(), pyDst.toDouble(),
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cellW.toDouble(), cellH.toDouble());
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final tile = t.tiles[i];
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var bgRect = Rect.fromLTWH(0, 0, cellW.toDouble(), cellH.toDouble());
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todos.add(Font.bg.imageName, bgRect, rectDst, tile.bg);
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var c = tile.content;
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if (c != null) {
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var fgRect = Rect.fromLTWH(c.sourceCx.toDouble() * cellW,
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c.sourceCy.toDouble() * cellH, cellW.toDouble(), cellH.toDouble());
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todos.add(c.sourceImage, fgRect, rectDst, tile.fg);
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}
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}
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for (var t in todos.imageTodos) {
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final atlas = t.atlas;
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if (atlas != null) {
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canvas.drawAtlas(atlas, t.transforms, t.rects, t.colors,
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BlendMode.modulate, null, paint);
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}
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}
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}
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}
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class Todos {
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List<ImageTodos> imageTodos = [];
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Map<String, int> imageTodoIx = {};
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void add(String source, Rect src, Rect dst, Color color) {
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var ix = imageTodoIx[source];
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if (ix == null) {
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ix = imageTodos.length;
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var image = assets.getImageIfAvailable(source);
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imageTodos.add(ImageTodos(image));
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imageTodoIx[source] = ix;
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}
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imageTodos[ix].add(src, dst, color);
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}
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}
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class ImageTodos {
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ui.Image? atlas;
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List<RSTransform> transforms = [];
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List<Rect> rects = [];
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List<Color> colors = [];
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ImageTodos(this.atlas);
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void add(Rect src, Rect dst, Color color) {
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transforms.add(RSTransform.fromComponents(
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rotation: 0.0,
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scale: 1.0,
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anchorX: 0.0,
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anchorY: 0.0,
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translateX: dst.left,
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translateY: dst.top,
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));
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rects.add(src);
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colors.add(color);
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}
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}
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