Sébastien QUEROLandClaude Opus 5.5
451464f7c6
Checks / web (push) Canceled after 0s
Port forced movement (turn delays, bumps, ice, currents, pits), dynamic return warps, elevators, Surf, Cut, Strength and cycling rules, working map blocks with changeblock/changemapblocks, and the remaining NPC movement types and movement commands. Add tileset animation from the ROM's command tables, grass sprite priority and special map palettes; room decorations with ownership, the bedroom PC and save migration; and Key Items access to the Bicycle. Fourteen original-engine traces compare positions, facing, actors, event flags and scripted poses. Tile animation matches original VRAM for four tilesets, and LoadMapPals matches 192 palette cases. skyfall_top now keeps the $60 sprite offset its step function leaves behind. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
50 lines
1.6 KiB
TypeScript
50 lines
1.6 KiB
TypeScript
import type { Palette } from "../world/types";
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/** Decode Game Boy planar pixels directly to RGBA; no display hardware emulation. */
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export function drawTile(
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target: Uint8ClampedArray,
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width: number,
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height: number,
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graphics: Uint8Array,
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tile: number,
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x: number,
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y: number,
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palette: Palette,
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options: {
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transparent?: boolean;
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flipX?: boolean;
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flipY?: boolean;
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/** Background color indices per pixel: a background tile records them;
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* an OAM_PRIO sprite (`behind`) only draws over color 0. */
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indices?: Uint8Array;
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behind?: boolean;
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} = {},
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) {
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const offset = tile * 16;
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if (offset < 0 || offset + 16 > graphics.length) return;
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for (let row = 0; row < 8; row++) {
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const sourceRow = options.flipY ? 7 - row : row;
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const lo = graphics[offset + sourceRow * 2],
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hi = graphics[offset + sourceRow * 2 + 1];
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for (let col = 0; col < 8; col++) {
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const bit = options.flipX ? col : 7 - col;
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const index = ((lo >> bit) & 1) | (((hi >> bit) & 1) << 1);
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if (options.transparent && index === 0) continue;
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const px = x + col,
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py = y + row;
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if (px < 0 || py < 0 || px >= width || py >= height) continue;
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if (options.indices) {
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if (options.behind) {
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if (options.indices[py * width + px]) continue;
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} else if (!options.transparent) options.indices[py * width + px] = index;
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}
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const destination = (py * width + px) * 4,
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color = palette[index];
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target[destination] = color[0];
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target[destination + 1] = color[1];
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target[destination + 2] = color[2];
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target[destination + 3] = 255;
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}
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}
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}
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