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fix: correct RGB565 PVR decoding

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GonnaHetzMe committed 2026-04-13 02:00:12 +02:00
1 parent 1920be28d8
commit 4205b16769
1 file changed
+12 -12
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packages/core/src/streams/pvr.ts
+12 -12
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@@ -1,5 +1,5 @@
import { clamp, isEqual, times } from 'lodash-es'; import { clamp, isEqual, times } from "lodash-es";
import { ReadStream } from './buffer'; import { ReadStream } from "./buffer";
export enum PvrFlags { export enum PvrFlags {
NoFlag = 0, NoFlag = 0,
@@ -96,7 +96,7 @@ export class PvrReadStream extends ReadStream {
const header = this.header(); const header = this.header();
this.metadata(); this.metadata();
if (typeof header.pixelFormat === 'number') { if (typeof header.pixelFormat === "number") {
switch (header.pixelFormat) { switch (header.pixelFormat) {
default: default:
throw new TypeError( throw new TypeError(
@@ -142,12 +142,12 @@ export class PvrReadStream extends ReadStream {
times(pixelCount, (index) => { times(pixelCount, (index) => {
const buffer = this.consumeUint8Array(2); const buffer = this.consumeUint8Array(2);
const bufferIndex = index * 4; const bufferIndex = index * 3;
const r = ((buffer[1] & 0b11111000) >>> 3) / 31; const r = ((buffer[1] & 0b11111000) >>> 3) / 31;
const g = const g =
((buffer[1] & 0b111) << 3) | (((buffer[1] & 0b111) << 3) | ((buffer[0] & 0b11100000) >>> 5)) /
(((buffer[0] & 0b11100000) >>> 5) / 31); 63;
const b = buffer[0] & 0b11111; const b = (buffer[0] & 0b11111) / 31;
data[bufferIndex] = Math.round(clamp(r * 255, 0, 255)); data[bufferIndex] = Math.round(clamp(r * 255, 0, 255));
data[bufferIndex + 1] = Math.round(clamp(g * 255, 0, 255)); data[bufferIndex + 1] = Math.round(clamp(g * 255, 0, 255));
@@ -186,7 +186,7 @@ export class PvrReadStream extends ReadStream {
metadataSize: this.uint32(), metadataSize: this.uint32(),
}; };
if (header.version !== 'PVR\x03') throw new TypeError('Endian mismatch'); if (header.version !== "PVR\x03") throw new TypeError("Endian mismatch");
return header; return header;
} }
@@ -205,19 +205,19 @@ export class PvrReadStream extends ReadStream {
resolveBitRatePixelFormat( resolveBitRatePixelFormat(
pixelFormat: Exclude<ReturnType<typeof this.pixelFormat>, number>, pixelFormat: Exclude<ReturnType<typeof this.pixelFormat>, number>,
) { ) {
if (pixelFormat.order === 'rgba') { if (pixelFormat.order === "rgba") {
if (isEqual(pixelFormat.bitRates, [4, 4, 4, 4])) { if (isEqual(pixelFormat.bitRates, [4, 4, 4, 4])) {
return ResolvedBitRatePixelFormat.R4G4B4A4; return ResolvedBitRatePixelFormat.R4G4B4A4;
} else } else
throw new TypeError( throw new TypeError(
`Unhandled rgba bit rate ${pixelFormat.bitRates.join(', ')}`, `Unhandled rgba bit rate ${pixelFormat.bitRates.join(", ")}`,
); );
} else if (pixelFormat.order === 'rgb\0') { } else if (pixelFormat.order === "rgb\0") {
if (isEqual(pixelFormat.bitRates, [5, 6, 5, 0])) { if (isEqual(pixelFormat.bitRates, [5, 6, 5, 0])) {
return ResolvedBitRatePixelFormat.R5G6B5A0; return ResolvedBitRatePixelFormat.R5G6B5A0;
} else } else
throw new TypeError( throw new TypeError(
`Unhandled rgb bit rate ${pixelFormat.bitRates.join(', ')}`, `Unhandled rgb bit rate ${pixelFormat.bitRates.join(", ")}`,
); );
} else { } else {
throw new TypeError(`Unhandled pixel order ${pixelFormat.order}`); throw new TypeError(`Unhandled pixel order ${pixelFormat.order}`);