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Fixes for image package v4 migration #110

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Fixes for image package v4 migration #110

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Fixes for image package v4 migration
  • Loading branch information
@igbenic
igbenic committed May 22, 2023
commit abe7b790e9a8d9bc8a6d90b25aac3e5e08d3ad09
69 changes: 63 additions & 6 deletions lib/src/generator.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -145,23 +145,80 @@ class Generator {

// Create a black bottom layer
final biggerImage = copyResize(image, width: widthPx, height: heightPx);
fill(biggerImage, 0);
fill(biggerImage, color: ColorRgb8(0, 0, 0));
// Insert source image into bigger one
drawImage(biggerImage, image, dstX: 0, dstY: 0);

int left = 0;
final List<List<int>> blobs = [];

while (left < widthPx) {
final Image slice = copyCrop(biggerImage, left, 0, lineHeight, heightPx);
final Uint8List bytes = slice.getBytes(format: Format.luminance);
final Image slice = copyCrop(biggerImage,
x: left, y: 0, width: lineHeight, height: heightPx);
grayscale(slice);
final imgBinary = slice.convert(numChannels: 1);
final bytes = imgBinary.getBytes();
blobs.add(bytes);
left += lineHeight;
}

return blobs;
}

/// Draw the image [src] onto the image [dst].
///
/// In other words, drawImage will take an rectangular area from src of
/// width [src_w] and height [src_h] at position ([src_x],[src_y]) and place it
/// in a rectangular area of [dst] of width [dst_w] and height [dst_h] at
/// position ([dst_x],[dst_y]).
///
/// If the source and destination coordinates and width and heights differ,
/// appropriate stretching or shrinking of the image fragment will be performed.
/// The coordinates refer to the upper left corner. This function can be used to
/// copy regions within the same image (if [dst] is the same as [src])
/// but if the regions overlap the results will be unpredictable.
Image drawImage(Image dst, Image src,
{int? dstX,
int? dstY,
int? dstW,
int? dstH,
int? srcX,
int? srcY,
int? srcW,
int? srcH,
bool blend = true}) {
dstX ??= 0;
dstY ??= 0;
srcX ??= 0;
srcY ??= 0;
srcW ??= src.width;
srcH ??= src.height;
dstW ??= (dst.width < src.width) ? dstW = dst.width : src.width;
dstH ??= (dst.height < src.height) ? dst.height : src.height;

if (blend) {
for (var y = 0; y < dstH; ++y) {
for (var x = 0; x < dstW; ++x) {
final stepX = (x * (srcW / dstW)).toInt();
final stepY = (y * (srcH / dstH)).toInt();
final srcPixel = src.getPixel(srcX + stepX, srcY + stepY);
drawPixel(dst, dstX + x, dstY + y, srcPixel);
}
}
} else {
for (var y = 0; y < dstH; ++y) {
for (var x = 0; x < dstW; ++x) {
final stepX = (x * (srcW / dstW)).toInt();
final stepY = (y * (srcH / dstH)).toInt();
final srcPixel = src.getPixel(srcX + stepX, srcY + stepY);
dst.setPixel(dstX + x, dstY + y, srcPixel);
}
}
}

return dst;
}

/// Image rasterization
List<int> _toRasterFormat(Image imgSrc) {
final Image image = Image.from(imgSrc); // make a copy
Expand All @@ -173,7 +230,7 @@ class Generator {

// R/G/B channels are same -> keep only one channel
final List<int> oneChannelBytes = [];
final List<int> buffer = image.getBytes(format: Format.rgba);
final List<int> buffer = image.getBytes(order: ChannelOrder.rgba);
for (int i = 0; i < buffer.length; i += 4) {
oneChannelBytes.add(buffer[i]);
}
Expand Down Expand Up @@ -577,8 +634,8 @@ class Generator {
const bool highDensityVertical = true;

invert(image);
flip(image, Flip.horizontal);
final Image imageRotated = copyRotate(image, 270);
flip(image, direction: FlipDirection.horizontal);
final Image imageRotated = copyRotate(image, angle: 270);

const int lineHeight = highDensityVertical ? 3 : 1;
final List<List<int>> blobs = _toColumnFormat(imageRotated, lineHeight * 8);
Expand Down
141 changes: 88 additions & 53 deletions pubspec.lock
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Original file line number Diff line number Diff line change
Expand Up @@ -5,72 +5,74 @@ packages:
dependency: transitive
description:
name: archive
url: "https://pub.dartlang.org"
sha256: a92e39b291073bb840a72cf43d96d2a63c74e9a485d227833e8ea0054d16ad16
url: "https://pub.dev"
source: hosted
version: "3.1.2"
async:
dependency: transitive
description:
name: async
url: "https://pub.dartlang.org"
sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
url: "https://pub.dev"
source: hosted
version: "2.8.2"
version: "2.11.0"
boolean_selector:
dependency: transitive
description:
name: boolean_selector
url: "https://pub.dartlang.org"
sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
url: "https://pub.dev"
source: hosted
version: "2.1.0"
version: "2.1.1"
characters:
dependency: transitive
description:
name: characters
url: "https://pub.dartlang.org"
sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
url: "https://pub.dev"
source: hosted
version: "1.2.0"
charcode:
dependency: transitive
description:
name: charcode
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.1"
version: "1.3.0"
clock:
dependency: transitive
description:
name: clock
url: "https://pub.dartlang.org"
sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
url: "https://pub.dev"
source: hosted
version: "1.1.0"
version: "1.1.1"
collection:
dependency: transitive
description:
name: collection
url: "https://pub.dartlang.org"
sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
url: "https://pub.dev"
source: hosted
version: "1.15.0"
version: "1.17.1"
crypto:
dependency: transitive
description:
name: crypto
url: "https://pub.dartlang.org"
sha256: cf75650c66c0316274e21d7c43d3dea246273af5955bd94e8184837cd577575c
url: "https://pub.dev"
source: hosted
version: "3.0.1"
csslib:
dependency: transitive
description:
name: csslib
url: "https://pub.dartlang.org"
sha256: f857285c8dc0b4f2f77b49a1c083ff8c75223a7549de20f3e607df58cf497a43
url: "https://pub.dev"
source: hosted
version: "0.17.0"
fake_async:
dependency: transitive
description:
name: fake_async
url: "https://pub.dartlang.org"
sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
url: "https://pub.dev"
source: hosted
version: "1.2.0"
version: "1.3.1"
flutter:
dependency: "direct main"
description: flutter
Expand All @@ -85,58 +87,82 @@ packages:
dependency: "direct main"
description:
name: gbk_codec
url: "https://pub.dartlang.org"
sha256: "3af5311fc9393115e3650ae6023862adf998051a804a08fb804f042724999f61"
url: "https://pub.dev"
source: hosted
version: "0.4.0"
hex:
dependency: "direct main"
description:
name: hex
url: "https://pub.dartlang.org"
sha256: "4e7cd54e4b59ba026432a6be2dd9d96e4c5205725194997193bf871703b82c4a"
url: "https://pub.dev"
source: hosted
version: "0.2.0"
html:
dependency: transitive
description:
name: html
url: "https://pub.dartlang.org"
sha256: bfef906cbd4e78ef49ae511d9074aebd1d2251482ef601a280973e8b58b51bbf
url: "https://pub.dev"
source: hosted
version: "0.15.0"
image:
dependency: "direct main"
description:
name: image
url: "https://pub.dartlang.org"
sha256: a72242c9a0ffb65d03de1b7113bc4e189686fc07c7147b8b41811d0dd0e0d9bf
url: "https://pub.dev"
source: hosted
version: "3.0.5"
version: "4.0.17"
js:
dependency: transitive
description:
name: js
sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
url: "https://pub.dev"
source: hosted
version: "0.6.7"
matcher:
dependency: transitive
description:
name: matcher
url: "https://pub.dartlang.org"
sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
url: "https://pub.dev"
source: hosted
version: "0.12.15"
material_color_utilities:
dependency: transitive
description:
name: material_color_utilities
sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
url: "https://pub.dev"
source: hosted
version: "0.12.11"
version: "0.2.0"
meta:
dependency: transitive
description:
name: meta
url: "https://pub.dartlang.org"
sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
url: "https://pub.dev"
source: hosted
version: "1.7.0"
version: "1.9.1"
path:
dependency: transitive
description:
name: path
url: "https://pub.dartlang.org"
sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
url: "https://pub.dev"
source: hosted
version: "1.8.0"
version: "1.8.3"
petitparser:
dependency: transitive
description:
name: petitparser
url: "https://pub.dartlang.org"
sha256: cb3798bef7fc021ac45b308f4b51208a152792445cce0448c9a4ba5879dd8750
url: "https://pub.dev"
source: hosted
version: "4.3.0"
version: "5.4.0"
sky_engine:
dependency: transitive
description: flutter
Expand All @@ -146,64 +172,73 @@ packages:
dependency: transitive
description:
name: source_span
url: "https://pub.dartlang.org"
sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
url: "https://pub.dev"
source: hosted
version: "1.8.1"
version: "1.9.1"
stack_trace:
dependency: transitive
description:
name: stack_trace
url: "https://pub.dartlang.org"
sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
url: "https://pub.dev"
source: hosted
version: "1.10.0"
version: "1.11.0"
stream_channel:
dependency: transitive
description:
name: stream_channel
url: "https://pub.dartlang.org"
sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
url: "https://pub.dev"
source: hosted
version: "2.1.0"
version: "2.1.1"
string_scanner:
dependency: transitive
description:
name: string_scanner
url: "https://pub.dartlang.org"
sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
url: "https://pub.dev"
source: hosted
version: "1.1.0"
version: "1.2.0"
term_glyph:
dependency: transitive
description:
name: term_glyph
url: "https://pub.dartlang.org"
sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
url: "https://pub.dev"
source: hosted
version: "1.2.0"
version: "1.2.1"
test_api:
dependency: transitive
description:
name: test_api
url: "https://pub.dartlang.org"
sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
url: "https://pub.dev"
source: hosted
version: "0.4.3"
version: "0.5.1"
typed_data:
dependency: transitive
description:
name: typed_data
url: "https://pub.dartlang.org"
sha256: "53bdf7e979cfbf3e28987552fd72f637e63f3c8724c9e56d9246942dc2fa36ee"
url: "https://pub.dev"
source: hosted
version: "1.3.0"
vector_math:
dependency: transitive
description:
name: vector_math
url: "https://pub.dartlang.org"
sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
url: "https://pub.dev"
source: hosted
version: "2.1.0"
version: "2.1.4"
xml:
dependency: transitive
description:
name: xml
url: "https://pub.dartlang.org"
sha256: "5bc72e1e45e941d825fd7468b9b4cc3b9327942649aeb6fc5cdbf135f0a86e84"
url: "https://pub.dev"
source: hosted
version: "5.3.0"
version: "6.3.0"
sdks:
dart: ">=2.14.0 <3.0.0"
dart: ">=3.0.0-0 <4.0.0"
2 changes: 1 addition & 1 deletion pubspec.yaml
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Expand Up @@ -11,7 +11,7 @@ dependencies:
sdk: flutter
hex: ^0.2.0
gbk_codec: ^0.4.0
image: ^3.0.2
image: ^4.0.17

dev_dependencies:
flutter_test:
Expand Down