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Percept
Release Notes
Version 0.8.8

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# 1 Percept Release Notes

This document describes the changes made to the Percept application.

### 1.1 Percept 0.8.8

#### Improvements and New Features

- Misc build updates

  Own Id: OTP-10784

### 1.2 Percept 0.8.7

#### Fixed Bugs and Malfunctions

- Add missing modules in app-file

  Own Id: OTP-10439

### 1.3 Percept 0.8.6.1

#### Improvements and New Features

- Miscellaneous documentation build updates

  Own Id: OTP-9813

### 1.4 Percept 0.8.6

#### Fixed Bugs and Malfunctions

- Fix message handling in select requests

  percept_db used to send results in untagged messages, and use a non selective receive to extract them. When percept is used from the shell process, this can confuse other messages with the actual result.

  Add a tag to the message to be {result, Result}. Add demonitor to avoid keeping DOWN message in the queue fix one spec in do_start/0

  (Thanks to Ahmed Omar)

  Own Id: OTP-9490

### 1.5 Percept 0.8.5

#### Fixed Bugs and Malfunctions

- Fixes a race condition found in percept_db start/1 function. (Thanks to Ahmed Omar)

  Own Id: OTP-9012

### 1.6 Percept 0.8.4

#### Fixed Bugs and Malfunctions

- Fix egd_render transparent to use float constants.

  The render engine has float guards to enhance beam code generation. However, the default case used integers which caused the engine to crash. This is now fixed.

  Own Id: OTP-8425

#### Improvements and New Features

- The documentation is now possible to build in an open source environment after a number of bugs are fixed and some features are added in the documentation build process.

  - The arity calculation is updated.

  - The module prefix used in the function names for bif's are removed in the generated links so the links will look like "http://www.erlang.org/doc/man/erlang.html#append_element-2" instead of "http://www.erlang.org/doc/man/erlang.html#erlang:append_element-2".

  - Enhanced the menu positioning in the html documentation when a new page is loaded.

  - A number of corrections in the generation of man pages (thanks to Sergei Golovan)

  - The legal notice is taken from the xml book file so OTP's build process can be used for non OTP applications.

  Own Id: OTP-8343

- Cleanups suggested by tidier and modernization of types and specs.

  Own Id: OTP-8455

### 1.7 Percept 0.8.3

#### Improvements and New Features

- The documentation is now built with open source tools (xsltproc and fop) that exists on most platforms. One visible change is that the frames are removed.

  Own Id: OTP-8201

### 1.8 Percept 0.8.2

#### Improvements and New Features

- Extensions to egd:color/1 for using atoms as color definition in addition to rgb triplets.

  Own Id: OTP-7975

### 1.9 Percept 0.8.1

#### Improvements and New Features

- egd now supports encapsulated postscript output format.

  Own Id: OTP-7923

### 1.10 Percept 0.8

#### Fixed Bugs and Malfunctions

- A problem with options list to percept causing some options to be disregarded unintentionally. This has now been fixed.

  An error in percept_analyzer caused calculation of standard deviation to be incorrect. This has now been corrected.

  Own Id: OTP-7693

#### Improvements and New Features

- Updated css for percept server for enhanced viewing.

  Increased performance of egd render.

  Several graph errors could occur when compacting data to decrease graph rendering time causing incorrect scalability numbers. These errors have now been fixed.

  Increased viewing width for graphs. The viewing width is now dependent on client screen resolution.

  Own Id: OTP-7696

### 1.11 Percept 0.7.3

#### Fixed Bugs and Malfunctions

- External pids caused the webserver to crash. This has now been fixed.

  Own Id: OTP-7515 Aux Id: seq11004

- Fixed a timestamp problem where some events could be sent out of order. Minor fixes to presentation of data.

  Own Id: OTP-7544 Aux Id: otp-7442

#### Improvements and New Features

- Performance enhancement for the egd render engine (Thanks to Magnus Thoäng).

  Own Id: OTP-7616

### 1.12 Percept 0.7.2

#### Fixed Bugs and Malfunctions

- Calling egd:destroy/1 did not properly remove the process holding the image.

  Synchronous calls done via the egd interface could erroneous receive messages not intended for egd. Messages are now tagged in such a way so this should not occur.

  Own Id: OTP-7336

### 1.13 Percept 0.7.1

#### Fixed Bugs and Malfunctions

- Fixed out of bounds rendering problem in egd which could cause the rendering process to crash.

  Own Id: OTP-7215

### 1.14 Percept 0.7

#### Improvements and New Features

- Percept no longer depends on external c-libraries. The graphical rendering is now done via erlang code.

  Own Id: OTP-7162

### 1.15 Percept 0.6.2

#### Improvements and New Features

- A new module, percept_profile, can now be used to collect profiling data even if the percept application is not installed. This should help profiling erlang application on target machines without libgd installed.

  Own Id: OTP-7126

### 1.16 Percept 0.5.0

#### First Release

- First Release.

  Own Id: OTP-6783