| // META: global=window,dedicatedworker |
| // META: script=/webcodecs/image-decoder-utils.js |
| |
| function testFourColorsDecode(filename, mimeType, options = {}) { |
| var decoder = null; |
| return fetch(filename).then(response => { |
| return testFourColorsDecodeBuffer(response.body, mimeType, options); |
| }); |
| } |
| |
| // Note: Requiring all data to do YUV decoding is a Chromium limitation, other |
| // implementations may support YUV decode with partial ReadableStream data. |
| function testFourColorsYuvDecode(filename, mimeType, options = {}) { |
| var decoder = null; |
| return fetch(filename).then( |
| response => {return response.arrayBuffer().then(buffer => { |
| return testFourColorsDecodeBuffer(buffer, mimeType, options); |
| })}); |
| } |
| |
| function testFourColorsDecodeBuffer(buffer, mimeType, options = {}) { |
| var decoder = new ImageDecoder( |
| {data: buffer, type: mimeType, preferAnimation: options.preferAnimation}); |
| return decoder.decode().then(result => { |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| if (options.preferAnimation !== undefined) { |
| assert_greater_than(decoder.tracks.length, 1); |
| assert_equals( |
| options.preferAnimation, decoder.tracks.selectedTrack.animated); |
| } |
| if (options.yuvFormat !== undefined) |
| assert_equals(result.image.format, options.yuvFormat); |
| if (options.tolerance === undefined) |
| options.tolerance = 0; |
| |
| let canvas = new OffscreenCanvas( |
| result.image.displayWidth, result.image.displayHeight); |
| let ctx = canvas.getContext('2d'); |
| ctx.drawImage(result.image, 0, 0); |
| |
| let top_left = ctx.getImageData(0, 0, 1, 1); |
| let top_right = ctx.getImageData(result.image.displayWidth - 1, 0, 1, 1); |
| let bottom_left = ctx.getImageData(0, result.image.displayHeight - 1, 1, 1); |
| let left_corner = ctx.getImageData( |
| result.image.displayWidth - 1, result.image.displayHeight - 1, 1, 1); |
| |
| assert_array_approx_equals( |
| top_left.data, [0xFF, 0xFF, 0x00, 0xFF], options.tolerance, |
| 'top left corner is yellow'); |
| assert_array_approx_equals( |
| top_right.data, [0xFF, 0x00, 0x00, 0xFF], options.tolerance, |
| 'top right corner is red'); |
| assert_array_approx_equals( |
| bottom_left.data, [0x00, 0x00, 0xFF, 0xFF], options.tolerance, |
| 'bottom left corner is blue'); |
| assert_array_approx_equals( |
| left_corner.data, [0x00, 0xFF, 0x00, 0xFF], options.tolerance, |
| 'bottom right corner is green'); |
| }); |
| } |
| |
| promise_test(t => { |
| return testFourColorsDecode('four-colors.jpg', 'image/jpeg'); |
| }, 'Test JPEG image decoding.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(1); |
| }, 'Test JPEG w/ EXIF orientation top-left.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(2); |
| }, 'Test JPEG w/ EXIF orientation top-right.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(3); |
| }, 'Test JPEG w/ EXIF orientation bottom-right.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(4); |
| }, 'Test JPEG w/ EXIF orientation bottom-left.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(5); |
| }, 'Test JPEG w/ EXIF orientation left-top.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(6); |
| }, 'Test JPEG w/ EXIF orientation right-top.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(7); |
| }, 'Test JPEG w/ EXIF orientation right-bottom.'); |
| |
| promise_test(t => { |
| return testFourColorDecodeWithExifOrientation(8); |
| }, 'Test JPEG w/ EXIF orientation left-bottom.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode('four-colors.png', 'image/png'); |
| }, 'Test PNG image decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode('four-colors.avif', 'image/avif'); |
| }, 'Test AVIF image decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode( |
| 'four-colors-full-range-bt2020-pq-444-10bpc.avif', 'image/avif'); |
| }, 'Test high bit depth HDR AVIF image decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode( |
| 'four-colors-flip.avif', 'image/avif', {preferAnimation: false}); |
| }, 'Test multi-track AVIF image decoding w/ preferAnimation=false.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode( |
| 'four-colors-flip.avif', 'image/avif', {preferAnimation: true}); |
| }, 'Test multi-track AVIF image decoding w/ preferAnimation=true.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode('four-colors.webp', 'image/webp'); |
| }, 'Test WEBP image decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsDecode('four-colors.gif', 'image/gif'); |
| }, 'Test GIF image decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsYuvDecode( |
| 'four-colors-limited-range-420-8bpc.jpg', 'image/jpeg', |
| {yuvFormat: 'I420', tolerance: 1}); |
| }, 'Test JPEG image YUV 4:2:0 decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsYuvDecode( |
| 'four-colors-limited-range-420-8bpc.avif', 'image/avif', |
| {yuvFormat: 'I420', tolerance: 1}); |
| }, 'Test AVIF image YUV 4:2:0 decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsYuvDecode( |
| 'four-colors-limited-range-422-8bpc.avif', 'image/avif', |
| {yuvFormat: 'I422', tolerance: 1}); |
| }, 'Test AVIF image YUV 4:2:2 decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsYuvDecode( |
| 'four-colors-limited-range-444-8bpc.avif', 'image/avif', |
| {yuvFormat: 'I444', tolerance: 1}); |
| }, 'Test AVIF image YUV 4:4:4 decoding.'); |
| |
| promise_test(t => { |
| return testFourColorsYuvDecode( |
| 'four-colors-limited-range-420-8bpc.webp', 'image/webp', |
| {yuvFormat: 'I420', tolerance: 1}); |
| }, 'Test WEBP image YUV 4:2:0 decoding.'); |
| |
| promise_test(t => { |
| return fetch('four-colors.png').then(response => { |
| let decoder = new ImageDecoder({data: response.body, type: 'junk/type'}); |
| return promise_rejects_dom(t, 'NotSupportedError', decoder.decode()); |
| }); |
| }, 'Test invalid mime type rejects decode() requests'); |
| |
| promise_test(t => { |
| return fetch('four-colors.png').then(response => { |
| let decoder = new ImageDecoder({data: response.body, type: 'junk/type'}); |
| return promise_rejects_dom( |
| t, 'NotSupportedError', decoder.decodeMetadata()); |
| }); |
| }, 'Test invalid mime type rejects decodeMetadata() requests'); |
| |
| promise_test(t => { |
| var decoder = null; |
| |
| return fetch('four-colors.png') |
| .then(response => { |
| decoder = new ImageDecoder({data: response.body, type: 'image/png'}); |
| return decoder.decodeMetadata(); |
| }) |
| .then(_ => { |
| decoder.tracks.selectedTrack.selected = false; |
| assert_equals(decoder.tracks.selectedIndex, -1); |
| assert_equals(decoder.tracks.selectedTrack, null); |
| return decoder.decodeMetadata(); |
| }) |
| .then(_ => { |
| return promise_rejects_dom(t, 'InvalidStateError', decoder.decode()); |
| }) |
| .then(_ => { |
| decoder.tracks[0].selected = true; |
| assert_equals(decoder.tracks.selectedIndex, 0); |
| assert_not_equals(decoder.tracks.selected, null); |
| return decoder.decode(); |
| }) |
| .then(result => { |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| }); |
| }, 'Test decode, decodeMetadata after no track selected.'); |
| |
| promise_test(t => { |
| var decoder = null; |
| |
| return fetch('four-colors-flip.avif') |
| .then(response => { |
| decoder = new ImageDecoder( |
| {data: response.body, type: 'image/avif', preferAnimation: false}); |
| return decoder.decodeMetadata(); |
| }) |
| .then(_ => { |
| assert_equals(decoder.tracks.length, 2); |
| assert_false(decoder.tracks[decoder.tracks.selectedIndex].animated) |
| assert_false(decoder.tracks.selectedTrack.animated); |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 1); |
| assert_equals(decoder.tracks.selectedTrack.repetitionCount, 0); |
| return decoder.decode(); |
| }) |
| .then(result => { |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| |
| // Swap to the the other track. |
| let newIndex = (decoder.tracks.selectedIndex + 1) % 2; |
| decoder.tracks[newIndex].selected = true; |
| return decoder.decode() |
| }) |
| .then(result => { |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| |
| assert_equals(decoder.tracks.length, 2); |
| assert_true(decoder.tracks[decoder.tracks.selectedIndex].animated) |
| assert_true(decoder.tracks.selectedTrack.animated); |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 7); |
| assert_equals(decoder.tracks.selectedTrack.repetitionCount, Infinity); |
| }); |
| }, 'Test track selection in multi track image.'); |
| |
| class InfiniteGifSource { |
| async load(repetitionCount) { |
| let response = await fetch('four-colors-flip.gif'); |
| let buffer = await response.arrayBuffer(); |
| |
| // Strip GIF trailer (0x3B) so we can continue to append frames. |
| this.baseImage = new Uint8Array(buffer.slice(0, buffer.byteLength - 1)); |
| this.baseImage[0x23] = repetitionCount; |
| this.counter = 0; |
| } |
| |
| start(controller) { |
| this.controller = controller; |
| this.controller.enqueue(this.baseImage); |
| } |
| |
| close() { |
| this.controller.enqueue(new Uint8Array([0x3B])); |
| this.controller.close(); |
| } |
| |
| addFrame() { |
| const FRAME1_START = 0x26; |
| const FRAME2_START = 0x553; |
| |
| if (this.counter++ % 2 == 0) |
| this.controller.enqueue(this.baseImage.slice(FRAME1_START, FRAME2_START)); |
| else |
| this.controller.enqueue(this.baseImage.slice(FRAME2_START)); |
| } |
| } |
| |
| promise_test(async t => { |
| let source = new InfiniteGifSource(); |
| await source.load(5); |
| |
| let stream = new ReadableStream(source, {type: 'bytes'}); |
| let decoder = new ImageDecoder({data: stream, type: 'image/gif'}); |
| return decoder.decodeMetadata() |
| .then(_ => { |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 2); |
| assert_equals(decoder.tracks.selectedTrack.repetitionCount, 5); |
| |
| source.addFrame(); |
| return decoder.decode({frameIndex: 2}); |
| }) |
| .then(result => { |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 3); |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| source.addFrame(); |
| return decoder.decode({frameIndex: 3}); |
| }) |
| .then(result => { |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 4); |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| |
| // Decode frame not yet available then reset before it comes in. |
| let p = decoder.decode({frameIndex: 5}); |
| decoder.reset(); |
| return promise_rejects_dom(t, 'AbortError', p); |
| }) |
| .then(_ => { |
| // Ensure we can still decode earlier frames. |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 4); |
| return decoder.decode({frameIndex: 3}); |
| }) |
| .then(result => { |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 4); |
| assert_equals(result.image.displayWidth, 320); |
| assert_equals(result.image.displayHeight, 240); |
| |
| // Decode frame not yet available then close before it comes in. |
| let p = decoder.decode({frameIndex: 5}); |
| let tracks = decoder.tracks; |
| let track = decoder.tracks.selectedTrack; |
| decoder.close(); |
| |
| assert_equals(decoder.type, ''); |
| assert_equals(decoder.tracks.length, 0); |
| assert_equals(tracks.length, 0); |
| track.selected = true; // Should do nothing. |
| |
| // Previous decode should be aborted. |
| return promise_rejects_dom(t, 'AbortError', p); |
| }) |
| .then(_ => { |
| // Ensure feeding the source after closing doesn't crash. |
| source.addFrame(); |
| return promise_rejects_dom( |
| t, 'InvalidStateError', decoder.decodeMetadata()); |
| }) |
| .then(_ => { |
| return promise_rejects_dom(t, 'InvalidStateError', decoder.decode()); |
| }); |
| }, 'Test ReadableStream of gif'); |
| |
| promise_test(async t => { |
| let source = new InfiniteGifSource(); |
| await source.load(5); |
| |
| let stream = new ReadableStream(source, {type: 'bytes'}); |
| let decoder = new ImageDecoder({data: stream, type: 'image/gif'}); |
| return decoder.decodeMetadata().then(_ => { |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 2); |
| assert_equals(decoder.tracks.selectedTrack.repetitionCount, 5); |
| |
| decoder.decode({frameIndex: 2}).then(t.unreached_func()); |
| decoder.decode({frameIndex: 1}).then(t.unreached_func()); |
| return decoder.decodeMetadata(); |
| }); |
| }, 'Test that decode requests are serialized.'); |
| |
| promise_test(async t => { |
| let source = new InfiniteGifSource(); |
| await source.load(5); |
| |
| let stream = new ReadableStream(source, {type: 'bytes'}); |
| let decoder = new ImageDecoder({data: stream, type: 'image/gif'}); |
| return decoder.decodeMetadata().then(_ => { |
| assert_equals(decoder.tracks.selectedTrack.frameCount, 2); |
| assert_equals(decoder.tracks.selectedTrack.repetitionCount, 5); |
| |
| // Decode frame not yet available then change tracks before it comes in. |
| let p = decoder.decode({frameIndex: 5}); |
| decoder.tracks.selectedTrack.selected = false; |
| return promise_rejects_dom(t, 'AbortError', p); |
| }); |
| }, 'Test ReadableStream aborts promises on track change'); |