Add support for single-channel images to MPImage
PiperOrigin-RevId: 527629970
This commit is contained in:
Sebastian Schmidt
Copybara-Service
parent
a5852b0513
commit
1b82821f15
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@ -29,17 +29,19 @@ if (skip) {
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/** The image types supported by MPImage. */
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type ImageType = ImageData|ImageBitmap|WebGLTexture;
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const IMAGE_2_2 = [1, 0, 0, 255, 2, 0, 0, 255, 3, 0, 0, 255, 4, 0, 0, 255];
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const IMAGE_2_1 = [1, 0, 0, 255, 2, 0, 0, 255];
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const IMAGE_2_2 = [1, 1, 1, 255, 2, 2, 2, 255, 3, 3, 3, 255, 4, 4, 4, 255];
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const IMAGE_2_1 = [1, 1, 1, 255, 2, 2, 2, 255];
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const IMAGE_2_3 = [
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1, 0, 0, 255, 2, 0, 0, 255, 3, 0, 0, 255,
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4, 0, 0, 255, 5, 0, 0, 255, 6, 0, 0, 255
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1, 1, 1, 255, 2, 2, 2, 255, 3, 3, 3, 255,
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4, 4, 4, 255, 5, 5, 5, 255, 6, 6, 6, 255
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];
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/** The test images and data to use for the unit tests below. */
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class MPImageTestContext {
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canvas!: OffscreenCanvas;
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gl!: WebGL2RenderingContext;
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uint8ClampedArray!: Uint8ClampedArray;
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float32Array!: Float32Array;
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imageData!: ImageData;
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imageBitmap!: ImageBitmap;
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webGLTexture!: WebGLTexture;
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@ -52,6 +54,13 @@ class MPImageTestContext {
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this.gl = this.canvas.getContext('webgl2') as WebGL2RenderingContext;
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const gl = this.gl;
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this.uint8ClampedArray = new Uint8ClampedArray(pixels.length / 4);
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this.float32Array = new Float32Array(pixels.length / 4);
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for (let i = 0; i < this.uint8ClampedArray.length; ++i) {
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this.uint8ClampedArray[i] = pixels[i * 4];
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this.float32Array[i] = pixels[i * 4] / 255;
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}
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this.imageData =
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new ImageData(new Uint8ClampedArray(pixels), width, height);
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this.imageBitmap = await createImageBitmap(this.imageData);
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@ -65,6 +74,10 @@ class MPImageTestContext {
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get(type: unknown) {
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switch (type) {
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case Uint8ClampedArray:
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return this.uint8ClampedArray;
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case Float32Array:
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return this.float32Array;
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case ImageData:
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return this.imageData;
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case ImageBitmap:
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@ -116,7 +129,13 @@ class MPImageTestContext {
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}
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function assertEquality(image: MPImage, expected: ImageType): void {
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if (expected instanceof ImageData) {
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if (expected instanceof Uint8ClampedArray) {
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const result = image.getImage(MPImageStorageType.UINT8_CLAMPED_ARRAY);
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expect(result).toEqual(expected);
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} else if (expected instanceof Float32Array) {
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const result = image.getImage(MPImageStorageType.FLOAT32_ARRAY);
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expect(result).toEqual(expected);
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} else if (expected instanceof ImageData) {
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const result = image.getImage(MPImageStorageType.IMAGE_DATA);
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expect(result).toEqual(expected);
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} else if (expected instanceof ImageBitmap) {
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@ -158,7 +177,9 @@ class MPImageTestContext {
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shaderContext.close();
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}
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const sources = skip ? [] : [ImageData, ImageBitmap, WebGLTexture];
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const sources = skip ?
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[] :
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[Uint8ClampedArray, Float32Array, ImageData, ImageBitmap, WebGLTexture];
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for (let i = 0; i < sources.length; i++) {
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for (let j = 0; j < sources.length; j++) {
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@ -220,15 +241,41 @@ class MPImageTestContext {
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const shaderContext = new MPImageShaderContext();
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const image = createImage(shaderContext, context.imageData, WIDTH, HEIGHT);
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expect(image.hasType(MPImageStorageType.IMAGE_DATA)).toBe(true);
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expect(image.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)).toBe(false);
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expect(image.hasType(MPImageStorageType.FLOAT32_ARRAY)).toBe(false);
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expect(image.hasType(MPImageStorageType.WEBGL_TEXTURE)).toBe(false);
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expect(image.hasType(MPImageStorageType.IMAGE_BITMAP)).toBe(false);
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image.getImage(MPImageStorageType.UINT8_CLAMPED_ARRAY);
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expect(image.hasType(MPImageStorageType.IMAGE_DATA)).toBe(true);
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expect(image.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.FLOAT32_ARRAY)).toBe(false);
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expect(image.hasType(MPImageStorageType.WEBGL_TEXTURE)).toBe(false);
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expect(image.hasType(MPImageStorageType.IMAGE_BITMAP)).toBe(false);
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image.getImage(MPImageStorageType.FLOAT32_ARRAY);
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expect(image.hasType(MPImageStorageType.IMAGE_DATA)).toBe(true);
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expect(image.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.FLOAT32_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.WEBGL_TEXTURE)).toBe(false);
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expect(image.hasType(MPImageStorageType.IMAGE_BITMAP)).toBe(false);
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image.getImage(MPImageStorageType.WEBGL_TEXTURE);
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expect(image.hasType(MPImageStorageType.IMAGE_DATA)).toBe(true);
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expect(image.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.FLOAT32_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.WEBGL_TEXTURE)).toBe(true);
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expect(image.hasType(MPImageStorageType.IMAGE_BITMAP)).toBe(false);
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image.getImage(MPImageStorageType.IMAGE_BITMAP);
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expect(image.hasType(MPImageStorageType.IMAGE_DATA)).toBe(true);
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expect(image.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.FLOAT32_ARRAY)).toBe(true);
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expect(image.hasType(MPImageStorageType.WEBGL_TEXTURE)).toBe(true);
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expect(image.hasType(MPImageStorageType.IMAGE_BITMAP)).toBe(true);
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@ -16,6 +16,12 @@
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/** The underlying type of the image. */
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export enum MPImageStorageType {
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/** Represents the native `UInt8ClampedArray` type. */
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UINT8_CLAMPED_ARRAY,
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/**
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* Represents the native `Float32Array` type. Values range from [0.0, 1.0].
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*/
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FLOAT32_ARRAY,
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/** Represents the native `ImageData` type. */
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IMAGE_DATA,
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/** Represents the native `ImageBitmap` type. */
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@ -213,6 +219,7 @@ export class MPImageShaderContext {
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return result;
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}
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/**
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* Binds a framebuffer to the canvas. If the framebuffer does not yet exist,
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* creates it first. Binds the provided texture to the framebuffer.
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@ -251,6 +258,97 @@ export class MPImageShaderContext {
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}
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}
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/**
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* An interface that can be used to provide custom conversion functions. These
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* functions are invoked to convert pixel values between different channel
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* counts and value ranges. Any conversion function that is not specified will
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* result in a default conversion.
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*/
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export interface MPImageChannelConverter {
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/**
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* A conversion function to convert a number in the [0.0, 1.0] range to RGBA.
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* The output is an array with four elemeents whose values range from 0 to 255
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* inclusive.
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*
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* The default conversion function is `[v * 255, v * 255, v * 255, 255]`
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* and will log a warning if invoked.
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*/
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floatToRGBAConverter?: (value: number) => [number, number, number, number];
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/*
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* A conversion function to convert a number in the [0, 255] range to RGBA.
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* The output is an array with four elemeents whose values range from 0 to 255
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* inclusive.
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*
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* The default conversion function is `[v, v , v , 255]` and will log a
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* warning if invoked.
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*/
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uint8ToRGBAConverter?: (value: number) => [number, number, number, number];
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/**
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* A conversion function to convert an RGBA value in the range of 0 to 255 to
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* a single value in the [0.0, 1.0] range.
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*
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* The default conversion function is `(r / 3 + g / 3 + b / 3) / 255` and will
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* log a warning if invoked.
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*/
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rgbaToFloatConverter?: (r: number, g: number, b: number, a: number) => number;
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/**
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* A conversion function to convert an RGBA value in the range of 0 to 255 to
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* a single value in the [0, 255] range.
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*
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* The default conversion function is `r / 3 + g / 3 + b / 3` and will log a
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* warning if invoked.
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*/
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rgbaToUint8Converter?: (r: number, g: number, b: number, a: number) => number;
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/**
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* A conversion function to convert a single value in the 0.0 to 1.0 range to
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* [0, 255].
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*
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* The default conversion function is `r * 255` and will log a warning if
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* invoked.
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*/
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floatToUint8Converter?: (value: number) => number;
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/**
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* A conversion function to convert a single value in the 0 to 255 range to
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* [0.0, 1.0] .
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*
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* The default conversion function is `r / 255` and will log a warning if
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* invoked.
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*/
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uint8ToFloatConverter?: (value: number) => number;
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}
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const DEFAULT_CONVERTER: Required<MPImageChannelConverter> = {
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floatToRGBAConverter: v => {
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console.log('Using default floatToRGBAConverter');
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return [v * 255, v * 255, v * 255, 255];
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},
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uint8ToRGBAConverter: v => {
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console.log('Using default uint8ToRGBAConverter');
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return [v, v, v, 255];
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},
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rgbaToFloatConverter: (r, g, b) => {
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console.log('Using default floatToRGBAConverter');
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return (r / 3 + g / 3 + b / 3) / 255;
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},
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rgbaToUint8Converter: (r, g, b) => {
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console.log('Using default rgbaToUint8Converter');
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return r / 3 + g / 3 + b / 3;
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},
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floatToUint8Converter: v => {
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console.log('Using default floatToUint8Converter');
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return v * 255;
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},
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uint8ToFloatConverter: v => {
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console.log('Using default uint8ToFloatConverter');
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return v / 255;
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},
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};
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/**
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* The wrapper class for MediaPipe Image objects.
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*
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@ -270,6 +368,14 @@ export class MPImageShaderContext {
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* initialized with an `OffscreenCanvas`. As we require WebGL2 support, this
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* places some limitations on Browser support as outlined here:
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* https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas/getContext
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*
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* Some MediaPipe tasks return single channel masks. These masks are stored
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* using an underlying `Uint8ClampedArray` an `Float32Array` (represented as
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* single-channel arrays). To convert these type to other formats a conversion
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* function is invoked to convert pixel values between single channel and four
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* channel RGBA values. To customize this conversion, you can specify these
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* conversion functions when you invoke `getImage()`. If you use the default
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* conversion function a warning will be logged to the console.
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*/
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export class MPImage {
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private gl?: WebGL2RenderingContext;
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@ -297,49 +403,110 @@ export class MPImage {
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return !!this.getContainer(type);
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}
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/**
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* Returns the underlying image as a single channel `Uint8ClampedArray`. Note
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* that this involves an expensive GPU to CPU transfer if the current image is
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* only available as an `ImageBitmap` or `WebGLTexture`. If necessary, this
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* function converts RGBA data pixel-by-pixel to a single channel value by
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* invoking a conversion function (see class comment for detail).
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*
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* @param type The type of image to return.
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* @param converter A set of conversion functions that will be invoked to
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* convert the underlying pixel data if necessary. You may omit this
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* function if the requested conversion does not change the pixel format.
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* @return The current data as a Uint8ClampedArray.
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*/
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getImage(
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type: MPImageStorageType.UINT8_CLAMPED_ARRAY,
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converter?: MPImageChannelConverter): Uint8ClampedArray;
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/**
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* Returns the underlying image as a single channel `Float32Array`. Note
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* that this involves an expensive GPU to CPU transfer if the current image is
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* only available as an `ImageBitmap` or `WebGLTexture`. If necessary, this
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* function converts RGBA data pixel-by-pixel to a single channel value by
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* invoking a conversion function (see class comment for detail).
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*
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* @param type The type of image to return.
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* @param converter A set of conversion functions that will be invoked to
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* convert the underlying pixel data if necessary. You may omit this
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* function if the requested conversion does not change the pixel format.
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* @return The current image as a Float32Array.
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*/
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getImage(
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type: MPImageStorageType.FLOAT32_ARRAY,
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converter?: MPImageChannelConverter): Float32Array;
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/**
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* Returns the underlying image as an `ImageData` object. Note that this
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* involves an expensive GPU to CPU transfer if the current image is only
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* available as an `ImageBitmap` or `WebGLTexture`.
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* available as an `ImageBitmap` or `WebGLTexture`. If necessary, this
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* function converts single channel pixel values to RGBA by invoking a
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* conversion function (see class comment for detail).
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*
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* @return The current image as an ImageData object.
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*/
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getImage(type: MPImageStorageType.IMAGE_DATA): ImageData;
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getImage(
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type: MPImageStorageType.IMAGE_DATA,
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converter?: MPImageChannelConverter): ImageData;
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/**
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* Returns the underlying image as an `ImageBitmap`. Note that
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* conversions to `ImageBitmap` are expensive, especially if the data
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* currently resides on CPU.
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* currently resides on CPU. If necessary, this function first converts single
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* channel pixel values to RGBA by invoking a conversion function (see class
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* comment for detail).
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*
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* Processing with `ImageBitmap`s requires that the MediaPipe Task was
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* initialized with an `OffscreenCanvas` with WebGL2 support. See
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* https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas/getContext
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* for a list of supported platforms.
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*
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* @param type The type of image to return.
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* @param converter A set of conversion functions that will be invoked to
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* convert the underlying pixel data if necessary. You may omit this
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* function if the requested conversion does not change the pixel format.
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* @return The current image as an ImageBitmap object.
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*/
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getImage(type: MPImageStorageType.IMAGE_BITMAP): ImageBitmap;
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getImage(
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type: MPImageStorageType.IMAGE_BITMAP,
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converter?: MPImageChannelConverter): ImageBitmap;
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/**
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* Returns the underlying image as a `WebGLTexture` object. Note that this
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* involves a CPU to GPU transfer if the current image is only available as
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* an `ImageData` object. The returned texture is bound to the current
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* canvas (see `.canvas`).
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*
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* @param type The type of image to return.
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* @param converter A set of conversion functions that will be invoked to
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* convert the underlying pixel data if necessary. You may omit this
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* function if the requested conversion does not change the pixel format.
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* @return The current image as a WebGLTexture.
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*/
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getImage(type: MPImageStorageType.WEBGL_TEXTURE): WebGLTexture;
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getImage(type?: MPImageStorageType): MPImageNativeContainer {
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getImage(
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type: MPImageStorageType.WEBGL_TEXTURE,
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converter?: MPImageChannelConverter): WebGLTexture;
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getImage(type?: MPImageStorageType, converter?: MPImageChannelConverter):
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MPImageNativeContainer {
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const internalConverter = {...DEFAULT_CONVERTER, ...converter};
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switch (type) {
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case MPImageStorageType.UINT8_CLAMPED_ARRAY:
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return this.convertToUint8ClampedArray(internalConverter);
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case MPImageStorageType.FLOAT32_ARRAY:
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return this.convertToFloat32Array(internalConverter);
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case MPImageStorageType.IMAGE_DATA:
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return this.convertToImageData();
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return this.convertToImageData(internalConverter);
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case MPImageStorageType.IMAGE_BITMAP:
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return this.convertToImageBitmap();
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return this.convertToImageBitmap(internalConverter);
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case MPImageStorageType.WEBGL_TEXTURE:
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return this.convertToWebGLTexture();
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return this.convertToWebGLTexture(internalConverter);
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default:
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throw new Error(`Type is not supported: ${type}`);
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}
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}
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private getContainer(type: MPImageStorageType.UINT8_CLAMPED_ARRAY):
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Uint8ClampedArray|undefined;
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private getContainer(type: MPImageStorageType.FLOAT32_ARRAY): Float32Array
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|undefined;
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private getContainer(type: MPImageStorageType.IMAGE_DATA): ImageData
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|undefined;
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private getContainer(type: MPImageStorageType.IMAGE_BITMAP): ImageBitmap
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@ -348,9 +515,14 @@ export class MPImage {
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|undefined;
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private getContainer(type: MPImageStorageType): MPImageNativeContainer
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|undefined;
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/** Returns the container for the requested storage type iff it exists. */
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private getContainer(type: MPImageStorageType): MPImageNativeContainer
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|undefined {
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switch (type) {
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case MPImageStorageType.UINT8_CLAMPED_ARRAY:
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return this.containers.find(img => img instanceof Uint8ClampedArray);
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case MPImageStorageType.FLOAT32_ARRAY:
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return this.containers.find(img => img instanceof Float32Array);
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case MPImageStorageType.IMAGE_DATA:
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return this.containers.find(img => img instanceof ImageData);
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case MPImageStorageType.IMAGE_BITMAP:
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@ -377,7 +549,11 @@ export class MPImage {
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for (const container of this.containers) {
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let destinationContainer: MPImageNativeContainer;
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if (container instanceof ImageData) {
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if (container instanceof Uint8ClampedArray) {
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destinationContainer = new Uint8ClampedArray(container);
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} else if (container instanceof Float32Array) {
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destinationContainer = new Float32Array(container);
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} else if (container instanceof ImageData) {
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destinationContainer =
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new ImageData(container.data, this.width, this.height);
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} else if (container instanceof WebGLTexture) {
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@ -406,7 +582,7 @@ export class MPImage {
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this.unbindTexture();
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} else if (container instanceof ImageBitmap) {
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this.convertToWebGLTexture();
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this.convertToWebGLTexture(DEFAULT_CONVERTER);
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this.bindTexture();
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destinationContainer = this.copyTextureToBitmap();
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this.unbindTexture();
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@ -423,7 +599,6 @@ export class MPImage {
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this.shaderContext, this.width, this.height);
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}
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|
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private getOffscreenCanvas(): OffscreenCanvas {
|
||||
if (!(this.canvas instanceof OffscreenCanvas)) {
|
||||
throw new Error(
|
||||
|
|
@ -455,48 +630,131 @@ export class MPImage {
|
|||
return this.shaderContext;
|
||||
}
|
||||
|
||||
private convertToImageBitmap(): ImageBitmap {
|
||||
private convertToImageBitmap(converter: Required<MPImageChannelConverter>):
|
||||
ImageBitmap {
|
||||
let imageBitmap = this.getContainer(MPImageStorageType.IMAGE_BITMAP);
|
||||
if (!imageBitmap) {
|
||||
this.convertToWebGLTexture();
|
||||
this.convertToWebGLTexture(converter);
|
||||
imageBitmap = this.convertWebGLTextureToImageBitmap();
|
||||
this.containers.push(imageBitmap);
|
||||
this.ownsImageBitmap = true;
|
||||
}
|
||||
|
||||
return imageBitmap;
|
||||
}
|
||||
|
||||
private convertToImageData(): ImageData {
|
||||
private convertToImageData(converter: Required<MPImageChannelConverter>):
|
||||
ImageData {
|
||||
let imageData = this.getContainer(MPImageStorageType.IMAGE_DATA);
|
||||
if (!imageData) {
|
||||
const gl = this.getGL();
|
||||
const shaderContext = this.getShaderContext();
|
||||
const pixels = new Uint8Array(this.width * this.height * 4);
|
||||
if (this.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)) {
|
||||
const source =
|
||||
this.getContainer(MPImageStorageType.UINT8_CLAMPED_ARRAY)!;
|
||||
const destination = new Uint8ClampedArray(this.width * this.height * 4);
|
||||
for (let i = 0; i < this.width * this.height; i++) {
|
||||
const rgba = converter.uint8ToRGBAConverter(source[i]);
|
||||
destination[i * 4] = rgba[0];
|
||||
destination[i * 4 + 1] = rgba[1];
|
||||
destination[i * 4 + 2] = rgba[2];
|
||||
destination[i * 4 + 3] = rgba[3];
|
||||
}
|
||||
imageData = new ImageData(destination, this.width, this.height);
|
||||
this.containers.push(imageData);
|
||||
} else if (this.hasType(MPImageStorageType.FLOAT32_ARRAY)) {
|
||||
const source = this.getContainer(MPImageStorageType.FLOAT32_ARRAY)!;
|
||||
const destination = new Uint8ClampedArray(this.width * this.height * 4);
|
||||
for (let i = 0; i < this.width * this.height; i++) {
|
||||
const rgba = converter.floatToRGBAConverter(source[i]);
|
||||
destination[i * 4] = rgba[0];
|
||||
destination[i * 4 + 1] = rgba[1];
|
||||
destination[i * 4 + 2] = rgba[2];
|
||||
destination[i * 4 + 3] = rgba[3];
|
||||
}
|
||||
imageData = new ImageData(destination, this.width, this.height);
|
||||
this.containers.push(imageData);
|
||||
} else if (
|
||||
this.hasType(MPImageStorageType.IMAGE_BITMAP) ||
|
||||
this.hasType(MPImageStorageType.WEBGL_TEXTURE)) {
|
||||
const gl = this.getGL();
|
||||
const shaderContext = this.getShaderContext();
|
||||
const pixels = new Uint8Array(this.width * this.height * 4);
|
||||
|
||||
// Create texture if needed
|
||||
const webGLTexture = this.convertToWebGLTexture();
|
||||
// Create texture if needed
|
||||
const webGlTexture = this.convertToWebGLTexture(converter);
|
||||
|
||||
// Create a framebuffer from the texture and read back pixels
|
||||
shaderContext.bindFramebuffer(gl, webGLTexture);
|
||||
gl.readPixels(
|
||||
0, 0, this.width, this.height, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
|
||||
shaderContext.unbindFramebuffer();
|
||||
// Create a framebuffer from the texture and read back pixels
|
||||
shaderContext.bindFramebuffer(gl, webGlTexture);
|
||||
gl.readPixels(
|
||||
0, 0, this.width, this.height, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
|
||||
shaderContext.unbindFramebuffer();
|
||||
|
||||
imageData = new ImageData(
|
||||
new Uint8ClampedArray(pixels.buffer), this.width, this.height);
|
||||
this.containers.push(imageData);
|
||||
imageData = new ImageData(
|
||||
new Uint8ClampedArray(pixels.buffer), this.width, this.height);
|
||||
this.containers.push(imageData);
|
||||
} else {
|
||||
throw new Error('Couldn\t find backing image for ImageData conversion');
|
||||
}
|
||||
}
|
||||
|
||||
return imageData;
|
||||
}
|
||||
|
||||
private convertToWebGLTexture(): WebGLTexture {
|
||||
private convertToUint8ClampedArray(
|
||||
converter: Required<MPImageChannelConverter>): Uint8ClampedArray {
|
||||
let uint8ClampedArray =
|
||||
this.getContainer(MPImageStorageType.UINT8_CLAMPED_ARRAY);
|
||||
if (!uint8ClampedArray) {
|
||||
if (this.hasType(MPImageStorageType.FLOAT32_ARRAY)) {
|
||||
const source = this.getContainer(MPImageStorageType.FLOAT32_ARRAY)!;
|
||||
uint8ClampedArray = new Uint8ClampedArray(
|
||||
source.map(v => converter.floatToUint8Converter(v)));
|
||||
} else {
|
||||
const source = this.convertToImageData(converter).data;
|
||||
uint8ClampedArray = new Uint8ClampedArray(this.width * this.height);
|
||||
for (let i = 0; i < this.width * this.height; i++) {
|
||||
uint8ClampedArray[i] = converter.rgbaToUint8Converter(
|
||||
source[i * 4], source[i * 4 + 1], source[i * 4 + 2],
|
||||
source[i * 4 + 3]);
|
||||
}
|
||||
}
|
||||
this.containers.push(uint8ClampedArray);
|
||||
}
|
||||
|
||||
return uint8ClampedArray;
|
||||
}
|
||||
|
||||
private convertToFloat32Array(converter: Required<MPImageChannelConverter>):
|
||||
Float32Array {
|
||||
let float32Array = this.getContainer(MPImageStorageType.FLOAT32_ARRAY);
|
||||
if (!float32Array) {
|
||||
if (this.hasType(MPImageStorageType.UINT8_CLAMPED_ARRAY)) {
|
||||
const source =
|
||||
this.getContainer(MPImageStorageType.UINT8_CLAMPED_ARRAY)!;
|
||||
float32Array = new Float32Array(source).map(
|
||||
v => converter.uint8ToFloatConverter(v));
|
||||
} else {
|
||||
const source = this.convertToImageData(converter).data;
|
||||
float32Array = new Float32Array(this.width * this.height);
|
||||
for (let i = 0; i < this.width * this.height; i++) {
|
||||
float32Array[i] = converter.rgbaToFloatConverter(
|
||||
source[i * 4], source[i * 4 + 1], source[i * 4 + 2],
|
||||
source[i * 4 + 3]);
|
||||
}
|
||||
}
|
||||
this.containers.push(float32Array);
|
||||
}
|
||||
|
||||
return float32Array;
|
||||
}
|
||||
|
||||
private convertToWebGLTexture(converter: Required<MPImageChannelConverter>):
|
||||
WebGLTexture {
|
||||
let webGLTexture = this.getContainer(MPImageStorageType.WEBGL_TEXTURE);
|
||||
if (!webGLTexture) {
|
||||
const gl = this.getGL();
|
||||
webGLTexture = this.bindTexture();
|
||||
const source = this.getContainer(MPImageStorageType.IMAGE_BITMAP) ||
|
||||
this.convertToImageData();
|
||||
this.convertToImageData(converter);
|
||||
gl.texImage2D(
|
||||
gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, source);
|
||||
this.unbindTexture();
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user