100 lines
2.2 KiB
Dart
100 lines
2.2 KiB
Dart
import 'dart:html';
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import 'dart:typed_data';
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class Pixel {
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int x;
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int y;
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int r;
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int g;
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int b;
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int a;
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Pixel(this.x, this.y, this.r, this.g, this.b, this.a);
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int getBytePos(int imageWidth) {
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return (x+y*imageWidth)*4;
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}
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void setRGB(int r, int g, int b) {
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this.r = r;
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this.g = g;
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this.b = b;
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}
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@override
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String toString() {
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return 'Pixel at $x, $y: {r: $r, g: $g, b: $b, a: $a}';
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}
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}
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class PixelArray {
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List<List<Pixel>> pixels;
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PixelArray.fromByteArray(Uint8ClampedList array, int imageWidth) {
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pixels = new List(array.length~/imageWidth~/4);
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int y = 0;
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int x = 0;
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pixels[y] = new List(imageWidth);
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print(pixels[0].length.toString() + ","+ pixels.length.toString());
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for (var pos = 0; pos < array.length; pos = pos + 4) {
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if (x >= imageWidth) {
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x = 0;
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y++;
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pixels[y] = new List(imageWidth);
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}
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pixels[y][x] = new Pixel(x, y, array[pos], array[pos+1], array[pos+2], array[pos+3]);
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x++;
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}
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}
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PixelArray.fromImageData(ImageData imagedata, int imageWidth): this.fromByteArray(imagedata.data, imageWidth);
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Uint8ClampedList toByteArray() {
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//TODO: look for longest array, or each line separately. Only gets width from line 1 currently.
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Uint8ClampedList result = new Uint8ClampedList(getHeight()*getWidth()*4);
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int x = 0;
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int y = 0;
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for (var i = 0; i < result.length; i = i + 4) {
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if (x >= getWidth()) {
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y++;
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x = 0;
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}
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result[i] = pixels[y][x].r;
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result[i+1] = pixels[y][x].g;
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result[i+2] = pixels[y][x].b;
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result[i+3] = pixels[y][x].a;
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x++;
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}
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return result;
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}
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Pixel getPixel(int x, int y) {
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return pixels[y][x];
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}
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void setPixel(Pixel pixel, [int x, int y]) {
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if (x != null && y != null && pixels[y] != null && pixels[y].length >= x) {
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pixel.x = x;
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pixel.y = y;
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pixels[y][x] = pixel;
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return;
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} else if (pixels.length < pixel.y || pixels[y].length < pixel.x) {
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return;
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} else {
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pixels[pixel.y][pixel.x] = pixel;
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return;
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}
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}
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int getWidth() {
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return pixels[0].length;
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}
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int getHeight() {
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return pixels.length;
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}
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} |