RenderScript is a high-performance runtime that provides compute operations at the native level. RenderScript code is compiled on devices at runtime to allow platform-independence as well.
This reference documentation describes the RenderScript runtime APIs, which you can utilize to write RenderScript code in C99. The RenderScript compute header files are automatically included for you.
RenderScript supports fixed size vectors of length 2, 3, and 4. Vectors are declared using the common type name followed by a 2, 3, or 4. E.g. float4, int3, double2, ulong4.
Multiple entries of a vector can be accessed at once by using an identifier that is the concatenation of multiple letters or indices. The resulting vector has a size equal to the number of entries named.
The entries don't have to be contiguous or in increasing order. Entries can even be repeated, as long as we're not trying to assign to it. You also can't mix the naming styles.
RenderScript supports fixed size square matrices of floats of size 2x2, 3x3, and 4x4. The types are named rs_matrix2x2, rs_matrix3x3, and rs_matrix4x4. See Matrix Functions for the list of operations.
Quaternions are also supported via rs_quaternion. See Quaterion Functions for the list of operations.
The types below are used to manipulate RenderScript objects like allocations, samplers, elements, and scripts. Most of these object are created using the Java RenderScript APIs.
The functions below convert from a numerical vector type to another, of from one color representation to another.
The mathematical functions below can be applied to scalars and vectors. When applied to vectors, the returned value is a vector of the function applied to each entry of the input.
See Vector Math Functions for functions like distance() and length() that interpret instead the input as a single vector in n-dimensional space.
The precision of the mathematical operations on 32 bit floats is affected by the pragmas rs_fp_relaxed and rs_fp_full. Under rs_fp_relaxed, subnormal values may be flushed to zero and rounding may be done towards zero. In comparison, rs_fp_full requires correct handling of subnormal values, i.e. smaller than 1.17549435e-38f. rs_fp_rull also requires round to nearest with ties to even.
Different precision/speed tradeoffs can be achieved by using variants of the common math functions. Functions with a name starting with
native_: May have custom hardware implementations with weaker precision. Additionally, subnormal values may be flushed to zero, rounding towards zero may be used, and NaN and infinity input may not be handled correctly.
half_: May perform internal computations using 16 bit floats. Additionally, subnormal values may be flushed to zero, and rounding towards zero may be used.
The precision of the mathematical operations on 32 bit floats is affected by the pragmas rs_fp_relaxed and rs_fp_full. See Mathematical Constants and Functions for details.
fast_: May perform internal computations using 16 bit floats. Additionally, subnormal values may be flushed to zero, and rounding towards zero may be used.
These functions let you manipulate square matrices of rank 2x2, 3x3, and 4x4. They are particularly useful for graphical transformations and are compatible with OpenGL.
We use a zero-based index for rows and columns. E.g. the last element of a rs_matrix4x4 is found at (3, 3).
RenderScript uses column-major matrices and column-based vectors. Transforming a vector is done by postmultiplying the vector, e.g. (matrix * vector), as provided by rsMatrixMultiply().
To create a transformation matrix that performs two transformations at once, multiply the two source matrices, with the first transformation as the right argument. E.g. to create a transformation matrix that applies the transformation s1 followed by s2, call rsMatrixLoadMultiply(&combined, &s2, &s1). This derives from s2 * (s1 * v), which is (s2 * s1) * v.
To update values shared between multiple threads, use the functions below. They ensure that the values are atomically updated, i.e. that the memory reads, the updates, and the memory writes are done in the right order.
These functions are slower than their non-atomic equivalents, so use them only when synchronization is needed.
Note that in RenderScript, your code is likely to be running in separate threads even though you did not explicitely create them. The RenderScript runtime will very often split the execution of one kernel across multiple threads. Updating globals should be done with atomic functions. If possible, modify your algorithm to avoid them altogether.
The functions below can be used to tell the current clock time and the current system up time. It is not recommended to call these functions inside of a kernel.
The rsGetElementAt and rsSetElement* functions are somewhat misnamed. They don't get or set elements, which are akin to data types; they get or set cells. Think of them as rsGetCellAt and and rsSetCellAt.
The functions below can be used to query the characteristics of an Allocation, Element, or Sampler object. These objects are created from Java. You can't create them from a script.
They are a structured collection of cells that can be used to store bitmaps, textures, arbitrary data points, etc.
This collection of cells may have many dimensions (X, Y, Z, Array0, Array1, Array2, Array3), faces (for cubemaps), and level of details (for mipmapping).
The term "element" is used a bit ambiguously in RenderScript, as both type information for the cells of an Allocation and the instantiation of that type. For example:
When creating Allocations of common elements, you can simply use one of the many predefined Elements like F32_2.
The functions below are intended to be used during application developement. They should not be used in shipping applications.
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Samsung and the TouchWiz UI are inseparable when you talk of their Android devices, but when you talk about the speed of the interface, it’s not always the best in comparison to the other smartphones and the reason for that is not always the interface itself but the way we use it and set options in it.
There are a lot of features in the Galaxy devices which eat up the battery, as well as make the device slow on performance. Below are a few basic tips that would help you increase the speed and performance of the Samsung devices with the TouchWiz interface.
The multitasking window in most of the Samsung galaxy devices can be accessed by long pressing the home key, and this would open a list of all the recently active and the currently active apps. Do make this a routine by reducing the number of active apps on this window, by sliding them to the right to inactivate them. These running apps are the ones which eat up the RAM and slows down the smartphone.
There are quite a lot of app processes that keep running in the background, and many at a time are responsible for the slowing down of the device. It’s manually possible to shut down these processes where you need to go to Settings > Application Manager and there you would be able to see the active processes, from which you need to select the app processes which you feel should not be running unnecessarily.
The S Voice feature was made to be a Siri alternative by Samsung, and it is not a bad feature, but the same wastes precious seconds when you try to access it through the home key, where double pressing the home key activates the S Voice. This takes 1-2 seconds unnecessarily, and for several of those users who don’t know much about the S Voice, and who feel that they don’t need the S Voice app opening from the home key, go to the S Voice app > Settings and there uncheck the option “Open via the home key”.
Now, let’s talk the basics. These are a few points which could work well in speeding up the other smartphones too, but have always been helpful in keeping the performance of the TouchWiZ UI good:
Each and every widget that is located on the different home screens uses the random memory to run, and because of being the live widgets such as the Weather, Clock, Mails, Social network updates widgets they keep the processor ticking and thus reduce the performance. If you are using them regularly, you may keep them or it’s better to remove the widgets.
We know that this isn’t a computer to shut down and restart, but yes restarting the smartphone stops all the unwanted processes that you might have started and failed to close, and thus a restart of the system changes the speed quite a bit.
There are animations which can add to the delay of the activities, and these can be stopped if you really don’t feel any need to have them running on several instances. To stop these animations, you need to go to Settings > Developer options and set the following to off:
This tip is specifically for the devices such as the Samsung Galaxy Grand, as you would not be getting such developer and animation settings in the later devices such as the Galaxy Mega.
So these above tips would come handy when you feel that your Samsung Android smartphone is being laggy and has become slow on performance, and you need some ways rather than rooting it to make the performance better than what it is right now.
“> Application Manager and there you would be able to see the active processes, from which you need to select the app processes which you feel should not be running unnecessarily.”
How do I determine which processes are safe to turn off? Are there any specifically that should be left on at all times?
I think the article has been written for the sake of writing it… Some specific tweaks would be welcome
Many users don’t even opt for these tips too and keep complaining about their devices. Yes you are right about tweaks and those can be found on XDA.
Killing the tasks from taskbar (accessing by holding home down) – it’s also possible to swipe to the left, does this also kill/remove the app from memory or does it only remove it from the list of latest accessed app’s ?
BabyFirst Video's Educational TV - Teaching That Speaks to Toddlers BabyFirst is an award winning global TV channel for babies, preschoolers – and the parents who love them! BabyFirst is committed to provide a fresh, safe, and engaging platform for toddlers and babies to learn about the world around them – in a way they can really get to grips with. BabyFirst was founded by people who understand the importance of early childhood development. Created by a team of child psychologists and experienced education experts, BabyFirst is proud to present BabyFirst Video's Educational TV. Your kids will love meeting their new friends at BabyFirst Educational TV, such as: Harry the Bunny, Peekaboo, VocabuLarry, Tillie Knock Knock, Bonnie Bear, Hide and Seek, The Notekins, and many more! What Makes BabyFirst so Great? • Ad-free • Child safe design • Available in multiple languages • Created by child education experts BabyFirst Video's Educational TV: Brought to You in Several Languages. Whether your baby is learning in English, Spanish, Portuguese, or Mandarin, you will find the relevant videos and shows at BabyFirst Educational TV. Your Child Is Safe and Sound with BabyFirst Video's Educational TV. With today’s electronic media, BabyFirst is aware of the dangers and distractions kids face online. Your tot’s safety is of paramount importance to us. BabyFirst’s child-safe design is built with the user in mind – your kids! There are no ads and parents have complete control over what children have access to. Our easy to navigate interface allows your child to play independently, giving you complete peace of mind as your child continues with their learning. Enjoy our specially designed Christmas Xmas holidays theme! To find more trusted applications from the BabyFirst family search "BF123" in iTunes! • Stable broadband connection is required. • Video quality is dependent on your data connection. • Users are advised to test with free videos before purchasing a monthly subscription. Please note: • The subscriptions will automatically renew at the end of each period unless auto-renew is turned off at least 24-hours before the end of the current period: - $3.99 per month, with an annual subscription - $5.99 per month, with a monthly subscription • Payment will be charged to iTunes Account at confirmation of purchase • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable • Please read our privacy policy and terms of us at: http://www.babyfirsttv.com/disclosure
So, I already pay for the baby first channel as part of my tv line up, and they’re saying I have to pay ANOTHER monthly fee to use this!?! What a load! Am I forced to pay extra for the HBO now app? Of course not bc I already pay a premium for their content. Soooooo what kind of genius would pay twice to view content they already pay for???? What a joke
I was charged For a year membership (not what I agreed to) and since the day I was charged I cannot play videos. So I was charged $50 for a flower icon on my phone since the app is useless since the update and trying to contact somebody is like a puzzle and nearly impossible
I have disputed this app for 8 months my card continues to get charged every month. Please stop my subscription to this app. I’ve called Apple and I cant seem to get anyone that can help either!!!
I pay 5.99 each month and for some reason this month the app will not load. I've tried re-downloading it and turning off the iPad and it still will not load and my autistic son is not very happy about it. So could you guys please fix the problem with the app?
The paid subscription is very disappointing. We purchased it for the purpose of traveling and not being connected to WiFi. You need to play each video in order for it to be available for offline viewing which is fine but we still had problems viewing more that half of the videos we downloaded. Very buggy and needs some work. Should have listened to the other user reviews listed before purchasing. Definitely a waste of money and would not recommend purchasing the subscription.
I wish there was an easier way to favorite/download my daughter’s favorite shows. Currently you have to watch the episode and then favorite it. So time consuming and such a pain!
The shows itself are awesome it’s the network connection . It says you can watch your baby first download off air but for the most part it does not work and when it does it should be able to play one show after the other and when you are connected to an internet some of the shows does not come upload very disappointing
I purchased the app and monthly subscription all on my iPad and I went ahead and downloaded it on my phone for easier access when needed but the issue I’m having is it doesn’t allow me to watch it on another device. I can only watch it on my iPad, I cannot log in on my phone!
We have the baby first channel at home and my son loves it. I figured this app would be amazing when away from home with a fussy baby. However, this app that I thought would be free is far from it. The “free” trial that they have when first opening the app is worthless considering it only has one video to watch. Disappointed to say the least
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The time when you had a personal smartphone and another for your professional activity is over thanks to dual SIM devices. Here is a selection of today's best dual sim phones. The dual SIM smartphones offer many advantages, in addition to not having two phones to manage, it's easy to switch between the work number and a personal number. Also,...
What are the best current Android smartphones of 2015? Which one worth our attention? especially considering the price that we will invest? We already tried almost all Android smartphones that have come out these recent months and we think it is time to give you our opinion and help you to choose which one to buy! The best Android smartphones We...
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