Sparc | first open-source Arma 3/DayZ RCon utility
kandi X-RAY | Sparc Summary
kandi X-RAY | Sparc Summary
The first open-source Arma 3/DayZ RCon utility ever created. Bundled with powerful and easy-to-use features.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Sparc
Sparc Key Features
Sparc Examples and Code Snippets
Community Discussions
Trending Discussions on Sparc
QUESTION
I am using a 3.5: TFT LCD display with an Arduino Uno and the library from the manufacturer, the KeDei TFT library. The library came with a bitmap font table that is huge for the small amount of memory of an Arduino Uno so I've been looking for alternatives.
What I am running into is that there doesn't seem to be a standard representation and some of the bitmap font tables I've found work fine and others display as strange doodles and marks or they display upside down or they display with letters flipped. After writing a simple application to display some of the characters, I finally realized that different bitmaps use different character orientations.
My questionWhat are the rules or standards or expected representations for the bit data for bitmap fonts? Why do there seem to be several different text character orientations used with bitmap fonts?
Thoughts about the questionAre these due to different target devices such as a Windows display driver or a Linux display driver versus a bare metal Arduino TFT LCD display driver?
What is the criteria used to determine a particular bitmap font representation as a series of unsigned char values? Are different types of raster devices such as a TFT LCD display and its controller have a different sequence of bits when drawing on the display surface by setting pixel colors?
What other possible bitmap font representations requiring a transformation which my version of the library currently doesn't offer, are there?
Is there some method other than the approach I'm using to determine what transformation is needed? I currently plug the bitmap font table into a test program and print out a set of characters to see how it looks and then fine tune the transformation by testing with the Arduino and the TFT LCD screen.
My experience thus farThe KeDei TFT library came with an a bitmap font table that was defined as
...ANSWER
Answered 2021-Jun-12 at 16:19Raster or bitmap fonts are represented in a number of different ways and there are bitmap font file standards that have been developed for both Linux and Windows. However raw data representation of bitmap fonts in programming language source code seems to vary depending on:
- the memory architecture of the target computer,
- the architecture and communication pathways to the display controller,
- character glyph height and width in pixels and
- the amount of memory for bitmap storage and what measures are taken to make that as small as possible.
A brief overview of bitmap fonts
A generic bitmap is a block of data in which individual bits are used to indicate a state of either on or off. One use of a bitmap is to store image data. Character glyphs can be created and stored as a collection of images, one for each character in the character set, so using a bitmap to encode and store each character image is a natural fit.
Bitmap fonts are bitmaps used to indicate how to display or print characters by turning on or off pixels or printing or not printing dots on a page. See Wikipedia Bitmap fonts
A bitmap font is one that stores each glyph as an array of pixels (that is, a bitmap). It is less commonly known as a raster font or a pixel font. Bitmap fonts are simply collections of raster images of glyphs. For each variant of the font, there is a complete set of glyph images, with each set containing an image for each character. For example, if a font has three sizes, and any combination of bold and italic, then there must be 12 complete sets of images.
A brief history of using bitmap fonts
The earliest user interface terminals such as teletype terminals used dot matrix printer mechanisms to print on rolls of paper. With the development of Cathode Ray Tube terminals bitmap fonts were readily transferable to that technology as dots of luminescence turned on and off by a scanning electron gun.
Earliest bitmap fonts were of a fixed height and width with the bitmap acting as a kind of stamp or pattern to print characters on the output medium, paper or display tube, with a fixed line height and a fixed line width such as the 80 columns and 24 lines of the DEC VT-100 terminal.
With increasing processing power, a more sophisticated typographical approach became available with vector fonts used to improve displayed text quality and provide improved scaling while also reducing memory required to describe the character glyphs.
In addition, while a matrix of dots or pixels worked fairly well for languages such as English, written languages with complex glyph forms were poorly served by bitmap fonts.
Representation of bitmap fonts in source code
There are a number of bitmap font file formats which provide a way to represent a bitmap font in a device independent description. For an example see Wikipedia topic - Glyph Bitmap Distribution Format
The Glyph Bitmap Distribution Format (BDF) by Adobe is a file format for storing bitmap fonts. The content takes the form of a text file intended to be human- and computer-readable. BDF is typically used in Unix X Window environments. It has largely been replaced by the PCF font format which is somewhat more efficient, and by scalable fonts such as OpenType and TrueType fonts.
Other bitmap standards such as XBM, Wikipedia topic - X BitMap, or XPM, Wikipedia topic - X PixMap, are source code components that describe bitmaps however many of these are not meant for bitmap fonts specifically but rather other graphical images such as icons, cursors, etc.
As bitmap fonts are an older format many times bitmap fonts are wrapped within another font standard such as TrueType in order to be compatible with the standard font subsystems of modern operating systems such as Linux and Windows.
However embedded systems that are running on the bare metal or using an RTOS will normally need the raw bitmap character image data in the form similar to the XBM format. See Encyclopedia of Graphics File Formats which has this example:
Following is an example of a 16x16 bitmap stored using both its X10 and X11 variations. Note that each array contains exactly the same data, but is stored using different data word types:
QUESTION
https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-54839.html#chapter7-2 states:
64–bit SPARC and 64–bit x86 use only Elf64_Rela relocation entries. Thus, the r_addend member serves as the relocation addend. x86 uses only Elf32_Rel relocation entries. The field to be relocated holds the addend.
There exists an Elf64_Rel
struct, so why isn't it being used on 64-bit x86 targets? Doesn't using Elf64_Rela
only waste space here as the pre-relocation addresses are just ignored (or at least are always 0 from what I've seen in testing)?
Note: r_addend
is omitted in Elf64_Rel
, not simply unused.
ANSWER
Answered 2021-Jun-09 at 00:09There exists an Elf64_Rel struct, so why isn't it being used on 64-bit x86 targets?
On x86_64
, there are several possible memory models. By default, the small memory model is used, which doesn't need any 64-bit relocations.
If you compile with -mcmodel=large
, then 64-bit relocations will be used.
QUESTION
Can someone please explain dimensionality logic for input X and class Y
for sparse_categorical_crossentropy
loss function ?
I checked both Keras and tf2 doc and examples, and this post.
Cross Entropy vs Sparce but one point is not clear to me.
Does the Y vector need to be expanded to the same number column as the number classes models outputs (if I use softmax output), or Does Keras automatically expand Y?
In my case, I have input images 32x32, and Y is a number between 0 and 10. So the input is (batch_size, h, w), Y (batch_size, 0....10 integer value)
...ANSWER
Answered 2021-Mar-30 at 14:37As mentioned in that post, both categorical cross-entropy (cce)
and sparse categorical cross-entropy (scc)
have the same loss function just except the format of the true label Y
. Simply if Y
is an integer, you would use scc
whereas if Y
is one-hot, you would use cce
. So for scc
, ground truth Y
is mostly 1D
whereas in cce
, ground truth Y
mostly is 2D
. For ground truth
QUESTION
In sparc architecture, there is ASI (address space indicator) that is passed to load, store instruction so if ASI is 0x20, cache is bypassed like it's IO access. Even if the memory range is set to cacheable at the page table, cache is bypassed. This is sometime very convenient like when synchronizing between cores using variable, etc.
Is there something similar in aarch64 architecture? I've looked through the instruction content but couldn't find any in the load/store instruction list.
ANSWER
Answered 2021-Mar-22 at 12:54ARMv8 does not have such instructions. Load/Store instructions access memory depends on mapping attributes.
Mentioned LDNP
and STNP
instructions are not intended to by-pass cache.
The Load/Store Non-temporal Pair instructions provide a hint to the memory system that an access is non-temporal or streaming, and unlikely to be repeated in the near future. This means that data caching is not required. However, depending on the memory type, the instructions might permit memory reads to be preloaded and memory writes to be gathered to accelerate bulk memory transfers. (Arm Architecture Reference Manual)
So cache still might be involved.
On top of that Cortex-A53 TRM, for example, explicitly states that cache would be involved.
Non-temporal loads
Cache requests made by a non-temporal load instruction (LDNP) are allocated to the L2 cache only. The allocation policy makes it likely that the line is replaced sooner than other lines.
For cores syncronisation you might check ARMv8 manual for lock implementations (aka atomic) and spin-lock.
As a side note, check your chip documentation. Plenty of modern chips have special hardware capabilities to provide hardware based cache-coherent interfaces.
QUESTION
Does Unicode define a blank character (like "Em Space" or "En Space") with the same width as any/some emoji (something like "Emoji Space")? If yes, which one is it?
I'd like to be able to format a fixed-width font plain-text table containing emojis (CI report e-mail). They seem to be impossible to align either with regular or any other spaces I tried (compare "x86_64", "arm" and "mips" lines):
...ANSWER
Answered 2021-Mar-07 at 10:44This is basically a font issue. You'd need a monospace font with a glyph for U+2705 WHITE HEAVY CHECK MARK and the other characters, and make sure to disable Emojis with a variation selector. Web browsers typically replace missing characters with a fallback font, but then you lose control over character spacing. Your best bet is to use characters which are more likely to be supported. Unfortunately, even U+2713 CHECK MARK seems to be supported only in a few monospace fonts.
QUESTION
In analyzing iofclose.c file, I found some strange part of that.
...ANSWER
Answered 2021-Feb-09 at 15:10You're reading the source code for the SPARC locking implementation, but the assembly you've shown is x86. I think the code you want is in sysdeps/unix/sysv/linux/x86/lowlevellock.h. There you'll see it tests if (is_single_thread)
. This expands to SINGLE_THREAD_P
, which is defined in sysdeps/unix/sysv/linux/single-thread.h to expand to __glibc_likely (__libc_multiple_threads == 0)
.
QUESTION
ANSWER
Answered 2021-Jan-05 at 03:59While I was not able to accomplish my task using matplotlib I came across a tutorial for plotly and dash while searching for the answer. There is one such wonderful tutorial here:
QUESTION
I am looking at this:
...ANSWER
Answered 2021-Jan-14 at 07:47Very brief overview for GCC:
GCC's .md
machine definition files tell it what instructions are available and what they do, using similar constraint syntax to GNU C inline asm. (GCC doesn't know about machine code, only asm text, that's why it can only output a .s
for as
to assemble separately.) There are also some C functions that know about generic rules for that architecture, and I guess stuff like register names.
The GCC-internals manual has a section 6.3.9 Anatomy of a Target Back End that documents where the relevant files are in the GCC source tree.
QUESTION
I am building recommender system - hybrid in Lightfm. My data has 39326 unique users and 2569 unique game titles(items). My train interaction sparce matrix has shape: <39326x2569 sparse matrix of type '' with 758931 stored elements in Compressed Sparse Row format> My test interaction sparce matrix has shape:<39323x2569 sparse matrix of type '' with 194622 stored elements in Compressed Sparse Row format>
I train model: model1 = LightFM(learning_rate=0.01, loss='warp')
model1.fit(train_interactions,
epochs=20)
which creates object:
But when I try to check accuracy by:
train_precision = precision_at_k(model1, train_interactions, k=10).mean()
test_precision = precision_at_k(model1, test_interactions, k=10).mean()
I get error message: Incorrect number of features in user_features WHY??? Clearly the shapes are compatible? What am I missing?
...ANSWER
Answered 2020-Dec-15 at 16:03Your test sparse matrix is of dimension 39323x2569 while your train sparse matrix is of dimension 39326x2569. You are missing 3 users in your test set.
I suggest you use the lightfm built-in train/test split function to avoid errors : https://making.lyst.com/lightfm/docs/cross_validation.html
If you want to split your data in your own way, you can also transform your user_id and item_id to consecutive integers starting from 0. And then use this :
QUESTION
I am writing a code for downloading the historical data for multiple stocks. The code is as given:
...ANSWER
Answered 2020-Dec-10 at 12:30You would better create a dictionary with stocks as keys. See below:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install Sparc
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page