Improving compiler.

scripts/gb2png.js

@@ -0,0 +1,88 @@
+const PNG = require('pngjs').PNG;
+const fs = require('fs');
+const {
+  TILE_WIDTH,
+  TILE_HEIGHT
+} = require('./common');
+
+const colorPixel = (id) => {
+  if(id === undefined) id = 3;
+  if(id === 3) return { r: 8, g: 24, b: 32 };
+  if(id === 2) return { r: 52, g: 104, b: 86 };
+  if(id === 1) return { r: 136, g: 192, b: 112 };
+  if(id === 0) return { r: 224, g: 248, b: 208 };
+  throw new Error();
+}
+
+const gb2png = (DATA, fileOut) => {
+  // Begin
+  const PIXELS = DATA.length / 2 * TILE_WIDTH;
+  const DATA_WIDTH = TILE_WIDTH;
+  const DATA_HEIGHT = PIXELS / DATA_WIDTH;
+
+  // Create output image
+  const imageData = new PNG({
+    width: DATA_WIDTH,
+    height: DATA_HEIGHT
+  });
+
+  // Convert data into pixels
+  const pixelsOut = [];
+  for(let i = 0; i < DATA.length; i += 2) {
+    const low = DATA[i];
+    const high = DATA[i+1];
+
+    for(let j = 0; j < 8; j++) {
+      const mask = 0x80 >> j;
+      const pixel = (low & mask ? 1 : 0) + (high & mask ? 2 : 0);
+      pixelsOut.push(pixel);
+    }
+  }
+
+  // Buffer data output
+  for(let y = 0; y < DATA_HEIGHT; y++) {
+    for(let x = 0; x < DATA_WIDTH; x++) {
+      const id = (DATA_WIDTH * y + x);
+      const color = colorPixel(pixelsOut[id]);
+      const idx = id << 2;
+
+      imageData.data[idx] = color.r;
+      imageData.data[idx+1] = color.g;
+      imageData.data[idx+2] = color.b;
+      imageData.data[idx+3] = 0xFF;
+    }
+  }
+  const buffer = PNG.sync.write(imageData, {  });
+  fs.writeFileSync(fileOut, buffer);
+}
+
+// // Now work out tile data
+// if(TILEMAP.length) {
+//   for(let i = 0; i < TILEMAP.length; i++) {
+//     const tileX = i % TILEMAP_WIDTH;
+//     const tileY = Math.floor(i / TILEMAP_WIDTH);
+//     const tile = TILEMAP[i];
+
+//     for(let j = 0; j < TILE_WIDTH*TILE_HEIGHT; j++) {
+//       const outI = (
+//         (tileX * TILE_WIDTH) + (tileY * TILE_HEIGHT * TILEMAP_PIXEL_WIDTH) +
+//         ((j % TILE_WIDTH) + (Math.floor(j / TILE_WIDTH) * TILEMAP_PIXEL_WIDTH))
+//       );
+//       const idx = outI << 2;
+//       const pixelI = (tile * TILE_WIDTH * TILE_HEIGHT) + j;
+//       const color = colorPixel(pixelsOut[pixelI]);
+
+//       tileData.data[idx] = color.r;
+//       tileData.data[idx+1] = color.g;
+//       tileData.data[idx+2] = color.b;
+//       tileData.data[idx+3] = 0xFF;
+//     }
+//   }
+
+//   const buffer2 = PNG.sync.write(tileData, {  });
+//   fs.writeFileSync('out.png', buffer2);
+// }
+
+module.exports = {
+  gb2png
+};