diff --git a/src/features/preprocessors/crop/shared/meta.ts b/src/features/preprocessors/crop/shared/meta.ts new file mode 100644 index 00000000..fc37d1bf --- /dev/null +++ b/src/features/preprocessors/crop/shared/meta.ts @@ -0,0 +1,25 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +export interface Options { + left: number; + right: number; + top: number; + bottom: number; +} + +export const defaultOptions: Options = { + left: 0, + right: 0, + top: 0, + bottom: 0, +}; diff --git a/src/features/preprocessors/crop/shared/missing-types.d.ts b/src/features/preprocessors/crop/shared/missing-types.d.ts new file mode 100644 index 00000000..c729fd74 --- /dev/null +++ b/src/features/preprocessors/crop/shared/missing-types.d.ts @@ -0,0 +1,13 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/// diff --git a/src/features/preprocessors/crop/worker/crop.ts b/src/features/preprocessors/crop/worker/crop.ts new file mode 100644 index 00000000..2d65c466 --- /dev/null +++ b/src/features/preprocessors/crop/worker/crop.ts @@ -0,0 +1,63 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +import { Options } from '../shared/meta'; + +export default async function crop( + data: ImageData, + opts: Options, +): Promise { + const { left, top, right, bottom } = opts; + const source = data.data; + const { width, height } = data; + const cols = width * 4; + + const newWidth = width - left - right; + const newHeight = height - top - bottom; + const len = newWidth * newHeight * 4; + const pixels = new Uint8ClampedArray(len); + + for (let y = 0; y < newHeight; y++) { + for (let x = 0; x < newWidth; x++) { + let i = y * cols + x * 4; + let j = (top + y) * cols + (left + x) * 4; + pixels[i] = source[j]; + pixels[i + 1] = source[j + 1]; + pixels[i + 2] = source[j + 2]; + pixels[i + 3] = source[j + 3]; + } + } + + // let sourceX = left; + // let sourceY = top; + // let x = 0; + // let y = 0; + // let i = 0; + // while (i < len) { + // let from = sourceY * cols + sourceX * 4; + + // pixels[i++] = source[from++]; + // pixels[i++] = source[from++]; + // pixels[i++] = source[from++]; + // pixels[i++] = source[from]; + + // if (++x === newWidth) { + // x = 0; + // y++; + + // sourceX = left; + // sourceY++; + // } + // } + + return new ImageData(pixels, newWidth, newHeight); +} diff --git a/src/features/preprocessors/crop/worker/missing-types.d.ts b/src/features/preprocessors/crop/worker/missing-types.d.ts new file mode 100644 index 00000000..c729fd74 --- /dev/null +++ b/src/features/preprocessors/crop/worker/missing-types.d.ts @@ -0,0 +1,13 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/// diff --git a/src/features/preprocessors/flip/shared/meta.ts b/src/features/preprocessors/flip/shared/meta.ts new file mode 100644 index 00000000..aa45a540 --- /dev/null +++ b/src/features/preprocessors/flip/shared/meta.ts @@ -0,0 +1,21 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +export interface Options { + horizontal: boolean; + vertical: boolean; +} + +export const defaultOptions: Options = { + horizontal: false, + vertical: false, +}; diff --git a/src/features/preprocessors/flip/shared/missing-types.d.ts b/src/features/preprocessors/flip/shared/missing-types.d.ts new file mode 100644 index 00000000..c729fd74 --- /dev/null +++ b/src/features/preprocessors/flip/shared/missing-types.d.ts @@ -0,0 +1,13 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/// diff --git a/src/features/preprocessors/flip/worker/flip.ts b/src/features/preprocessors/flip/worker/flip.ts new file mode 100644 index 00000000..e66cc471 --- /dev/null +++ b/src/features/preprocessors/flip/worker/flip.ts @@ -0,0 +1,68 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +import { Options } from '../shared/meta'; + +export default async function flip( + data: ImageData, + opts: Options, +): Promise { + const { vertical, horizontal } = opts; + const source = data.data; + const len = source.length; + const pixels = new Uint8ClampedArray(len); + const { width, height } = data; + + let i = 0; + let x = 0; + let y = 0; + const cols = width * 4; + while (i < len) { + let from = vertical ? (height - y) * cols + x * 4 : i; + if (horizontal) from = from - x * 4 + cols - x * 4; // todo: reduce + + pixels[i++] = source[from++]; + pixels[i++] = source[from++]; + pixels[i++] = source[from++]; + pixels[i++] = source[from]; + + if (++x === width) { + x = 0; + y++; + } + } + + /* + function swap(a: number, b: number) { + let tmp = pixels[a]; + pixels[a] = pixels[b]; + pixels[b] = tmp; + } + function swapRgba(a: number, b: number) { + swap(a, b); + swap(a+1, b+1); + swap(a+2, b+2); + swap(a+3, b+3); + } + const COLS = data.width * 4; + // for (let y = 0, y2 = (data.height - 1); y < y2; y+=4, y2-=4) { + for (let y = 0; y < data.height; y++) { + for (let x = 0, x2 = COLS - 4; x < x2; x+=4, x2-=4) { + const offsetX = y * COLS; + const offsetY = (opts.vertical ? (data.height - y) : y) * COLS; + const flippedX = opts.horizontal ? x2 : x; + swapRgba(offsetX + x, offsetY + x2); + } + } + */ + return new ImageData(pixels, data.width, data.height); +} diff --git a/src/features/preprocessors/flip/worker/missing-types.d.ts b/src/features/preprocessors/flip/worker/missing-types.d.ts new file mode 100644 index 00000000..c729fd74 --- /dev/null +++ b/src/features/preprocessors/flip/worker/missing-types.d.ts @@ -0,0 +1,13 @@ +/** + * Copyright 2020 Google Inc. All Rights Reserved. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * http://www.apache.org/licenses/LICENSE-2.0 + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +///