bitmap | Simple dense bitmap index in Go with binary operators

by kelindar Go Version: v1.2.1 License: MIT

X-Ray Key Features Code Snippets(2)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | bitmap Summary

bitmap is a Go library typically used in Big Data applications. bitmap has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This package contains a bitmap implementation, backed by a slice of []uint64 and designed for dense small or medium collections. This implementation focuses on high performance by avoiding heap allocations, unrolling loops and implementing SIMD vectorization in assembly.

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Quality

Security

License

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Support

bitmap has a low active ecosystem.

It has 129 star(s) with 12 fork(s). There are 6 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 4 have been closed. On average issues are closed in 0 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of bitmap is v1.2.1

Quality

bitmap has 0 bugs and 0 code smells.

Security

bitmap has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

bitmap code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

bitmap is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

bitmap releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

It has 1318 lines of code, 83 functions and 12 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed bitmap and discovered the below as its top functions. This is intended to give you an instant insight into bitmap implemented functionality, and help decide if they suit your requirements.

makeOp is used to create a new opcode .
makeCount builds a count matrix
resize expands v to capacity .
CountTo returns the number of bits between a uint32
Generate build count
FromBytes constructs a Bitmap from a byte array .
count returns the sum of all values in arr .
xor xor b
andn computes the difference of two bitmaps .
or computes the union of two bitmaps .

Get all kandi verified functions for this library.

bitmap Key Features

No Key Features are available at this moment for bitmap.

bitmap Examples and Code Snippets

Encodes the given bitmap into a secret file .

python

Lines of Code : 19

License : Permissive (MIT License)

Copy

def encode(bitmap: Bitmap, path: pathlib.Path) -> None:
    """Embed a secret file in the bitmap."""

    file = SecretFile(path)

    if file.num_secret_bytes > bitmap.max_bytes:
        raise EncodingError("Not enough pixels to embed a secret

Extract a secret file from a bitmap .

python

Lines of Code : 13

License : Permissive (MIT License)

Copy

def decode(bitmap: Bitmap) -> None:
    """Extract a secret file from the bitmap."""

    if bitmap.reserved_field <= 0:
        raise DecodingError("Secret file not found in the bitmap")

    iterator = secret_bytes(bitmap)

    filename = "".

Community Discussions

Trending Discussions on bitmap

SSIS package fails to process all rows with C# Script task when started with SQL Server Agent

Postgres choosing a query plan that is more expensive by its own estimates

How to load Image Files into Jetpack Compose Image using Coil

LinearGradientBrush results in non-smooth gradient bitmap

Graphics generation in csharp with Graphics.DrawString renders different, depending on platform. (GDI)

"Theming Icons" functionality crashes live wallpapers on Android 12

Comparing two VectorDrawables fails in Kaspresso - Android

Draw rectangle box for letters

Jetpack Compose how to create an ImageBitmap with specific size and configurations?

How can I display a bitmap in Compose Image

QUESTION

SSIS package fails to process all rows with C# Script task when started with SQL Server Agent

Asked 2022-Mar-07 at 16:58

I have a requirement to build a SSIS package that sends HTML formatted emails and then saves the emails as tiff files. I have created a script task that processes the necessary records and then coverts the HTML code to the tiff. I have split the process into separate packages, the email send works fine the converting HTML to tiff is causing the issue.

When running the package manually it will process all files without any issues. my test currently is about 315 files this needs to be able to process at least 1,000 when finished with the ability to send up to 10,000 at one time. The problem is when I set the package to execute using SQL Server Agent it stops at 207 files. The package is deployed to SQL Server 2019 in the SSIS Catalog

What I have tried so far

I started with the script being placed in a SSIS package and deployed to the server and calling the package from a step (works 99.999999% of the time with all packages) tried both 32 and 64 bit runtime. Never any error messages just Unexpected Termination when looking at the execution reports. When clicking in the catalog and executing package it will process all the files. The SQL Server Agent is using a proxy and I also created another proxy account with my admin credentials to test for any issues with the account.

Created another package to call the package and used the Execute Package Task to call the first package, same result 207 files. Changed the execute Process task to an Execute SQL Task and tried the script that is created to manually start a package in the catalog 207 files. Tried executing the script from the command line both through the other SSIS package and the SQL Server Agent directly same results 207 files. If I try any of those methods directly outside SQL Server Agent the process runs no issues.

I converted the script task to a console application and it works processing all the files. When calling the executable file from any method from the SQL Server Agent it once again stops at the 207 files.

I have consulted with the companies DBA and Systems teams and they have not found anything that could be causing this error. There seems to be some type of limit that no matter the method of execution SQL Server Agent will not allow. I have mentioned looking at third-party applications but have been told no.

I have included the code below that I have been able to piece together. I am a SQL developer so C# is outside my knowledge base. Is there a way to optimize the code so it only uses one thread or does a cleanup between each letter. There may be a need for this to create over ten thousand letters at certain times.

Update

I have replaced the code with the new updated code. The email and image creation are all included as this is what the final product must do. When sending the emails there is a primary and secondary email address and depending on what email address is used it will change what the body of the email contains. When looking at the code there is a section of try catch that sends to primary when indicated to and if that fails it send to secondary instead. I am guessing there is a much cleaner way of doing that section but this is my first program as I work in SQL for everything else.

Thank You for all the suggestions and help.

Updated Code

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ANSWER

Answered 2022-Mar-07 at 16:58

I have resolved the issue so it meets the needs of my project. There is probably a better solution but this does work. Using the code above I created an executable file and limited the result set to top 100. Created a ssis package with a For Loop that does a record count from the staging table and kicks off the executable file. I performed several tests and was able to exceed the 10,000 limit that was a requirement to the project.

Source https://stackoverflow.com/questions/71353620

QUESTION

Postgres choosing a query plan that is more expensive by its own estimates

Asked 2022-Feb-17 at 17:25

I have the following 2 query plans for a particular query (second one was obtained by turning seqscan off):

The cost estimate for the second plan is lower than that for the first, however, pg only chooses the second plan if forced to do so (by turning seqscan off).

What could be causing this behaviour?

EDIT: Updating the question with information requested in a comment:

Output for EXPLAIN (ANALYZE, BUFFERS, VERBOSE) for query 1 (seqscan on; does not use index). Also viewable at https://explain.depesz.com/s/cGLY:

...

ANSWER

Answered 2022-Feb-17 at 11:43

You should have those two indexes to speed up your query :

Source https://stackoverflow.com/questions/71154089

QUESTION

How to load Image Files into Jetpack Compose Image using Coil

Asked 2022-Feb-05 at 16:19

I would like to load saved image on cache into Image of Jetpack Compose using Coil. I searched in stackoverflow but all suggested ways are for loading web urls. I know that It's possible to convert image file to bitmap and then pass it to Coil but is there any builtin solution for it?

...

ANSWER

Answered 2021-Sep-13 at 09:05

You can use Coil to load any object as a data:

Source https://stackoverflow.com/questions/69159724

QUESTION

LinearGradientBrush results in non-smooth gradient bitmap

Asked 2022-Jan-13 at 14:42

I'm using this function to generate a simple gradient bitmap using LinearGradientBrush which I save as a file in the end to use as a wallpaper. But the the problem is the result doesn't look "smooth", it looks rather "choppy" as you can see the colors' lines.

I use the bounds of the screen as the dimensions of the bitmap and increasing the size doesn't improve the quality (I tried 2x and even 4x).

I tried setting the InterpolationMode and SmoothingMode but neither seemed to have an effect on the end result.

Is there a way to fix this issue?

...

ANSWER

Answered 2022-Jan-13 at 14:42

The issue is with the RandomShade() method. By generating a shade using the alpha channel, the gradient is also interpolating this channel.

I think an approach that would yield better results is darkening or lightening the color randomly using the other three (color) channels instead, and keep the alpha constant. In other words, vary the brightness of the colors only.

For example:

Source https://stackoverflow.com/questions/70676758

QUESTION

Graphics generation in csharp with Graphics.DrawString renders different, depending on platform. (GDI)

Asked 2021-Dec-23 at 21:38

For a Belgian sports community project, built in ASP.Net Core, I am dynamically rendering an image in C#. The image is based on a "base picture", in which I dynamically add Text and then return the image to the client.

It works well, and I am quite happy with the results.

However, when I compare the image that is generated client side, on my dev environment (which is MacOS), that image renders more beautiful, compared to my production environment (a Linux VM in the Azure platform).

As a comparison, you can see two pictures, and you will see the difference, when looking at the texts. The text strings look much more pixelated, in the second picture.

Is there something I can do, to avoid this? Could this be related to the (un)availability of a GPU, or something like that?

Any insights are welcome.

(I also have added the Nuget package runtime.osx.10.10-x64.CoreCompat.System.Drawing to my project, which was needed to run successfully on my MacOS)

For reference: the relevant code snippet:

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ANSWER

Answered 2021-Dec-23 at 21:38

Don't use System.Drawing. Microsoft itself warns against this in the documentation. It exists in .NET Core only for compatibility

In .NET 6 and later versions, the System.Drawing.Common package, which includes this type, is only supported on Windows operating systems. Use of this type in cross-platform apps causes compile-time warnings and run-time exceptions. For more information, see System.Drawing.Common only supported on Windows.

The linked article explains what's wrong and offers several cross-platform alternatives like ImageSharp and SkiaSharp.

System.Drawing's primary job is to draw the UI on the screen anyway, not manipulate images. On Windows it's just a very thin wrapper over GDI+. The equivalent cross-platform technology is MAUI, which hasn't been released yet.

The equivalent code in ImageSharp could be:

Source https://stackoverflow.com/questions/70380462

QUESTION

"Theming Icons" functionality crashes live wallpapers on Android 12

Asked 2021-Dec-07 at 22:23

I recently noticed that my live wallpaper apps are crashing when users try to set the newly introduced "Theming Icons" functionality on Android 12. This new functionality calculates a palette of colors from the user's current static wallpaper and uses this palette to color some of the other apps icons (a feature of the new "Material You" design). But for some reason when it operates on a live wallpaper it crashes the app with the following log:

...

ANSWER

Answered 2021-Nov-30 at 22:05

For a while I was looking for a similar problem in reviews of popular live wallpapers. I found similar reviews only for one application. I updated my phone today. All my live wallpapers stopped working as expected. Then I installed "Earth & Moon" and this app works fine. It means that we are doing something wrong or, on the contrary, we are not doing something :) In the near future I will begin to investigate this problem.

Source https://stackoverflow.com/questions/69982353

QUESTION

Comparing two VectorDrawables fails in Kaspresso - Android

Asked 2021-Nov-08 at 18:21

I'm trying to use Kaspresso for tests and I'm checking whether a view has a certain drawable with the method:

...

ANSWER

Answered 2021-Nov-08 at 18:21

The issue was because actually the image is scaled. So the scaled image is different from the original one.

To avoid this issue I've used this "altered" KImageView:

Source https://stackoverflow.com/questions/69760356

QUESTION

Draw rectangle box for letters

Asked 2021-Nov-07 at 15:44

My code. Output:

...

ANSWER

Answered 2021-Nov-07 at 15:44

This line made me find one error in your code:

Source https://stackoverflow.com/questions/69873641

QUESTION

Jetpack Compose how to create an ImageBitmap with specific size and configurations?

Asked 2021-Nov-07 at 11:21

ImageBitmap loads and image with

...

ANSWER

Answered 2021-Nov-07 at 11:21

You can convert Bitmap to ImageBitmap:

Source https://stackoverflow.com/questions/68639232

QUESTION

How can I display a bitmap in Compose Image

Asked 2021-Oct-23 at 14:54

I have a function that returns a bitmap (which "contains" a QR code) and I wanted to display that bitmap inside an Image (composable function) but I didn't find any way to either convert the bitmap into a ImageBitmap or just displaying that bitmap.

...

ANSWER

Answered 2021-Oct-23 at 14:51

Coil is capable of displaying a Bitmap inside Image:

Source https://stackoverflow.com/questions/69689168

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install bitmap

You can download it from GitHub.

Support

The general idea of this package is to have a dead simple way of creating bitmaps (bitsets) that provide maximum performance on the modern hardware by using vectorized single-instruction multiple data (SIMD) operations. As opposed to something as roaring bitmaps which are excellent for sparse data, this implementation is designed to be used for small or medium dense bit sets. I've used this package to build a columnar in-memory store, so if you want to see how it can be used for indexing, have a look at kelindar/column. I'd like to specifically point out the indexing part and how bitmaps can be used as a good alternative to B*Trees and Hash Maps. First, here's what you need to do in order to import this package.

Find more information at: