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51 lines
3.0 KiB
Markdown
51 lines
3.0 KiB
Markdown
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PDQ_GFX_Libs with packed font support
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============
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Version with special "packed" font support. Also include TTF2GFX for create custom GFX fonts from TTF.
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Speed up improvement for GFX text drawing about 2-3 times.
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Allow to create custom fonts with subset of chars (not all ASCII table).
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Special "packing" algorithm for GFX font allow to save 20-50% of space
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PDQ_GFX_Libs
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============
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An optimized fork of Adafruit's GFX library (and LCD drivers) for Arduino (AVR).
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This is a replacement "re-mix" of the Adafruit GFX library and associated hardware drivers.
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Currently supported are ILI9340, ILI9341, ST7735 and ST7781 LCD drivers (and compatible chipsets).
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It is between 2.5x and 12x faster than the Adafruit libraries for SPI LCDs, but it aims to be completely "sketch compatible" (so you
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can easily speed up your sketches that are using Adafruit's library). You just need to change the name of the #include and "tft"
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object. A version of the Adafruit "benchmark" example is included (PDQ_graphicsbest.ino) with each driver library.
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This includes the 1.8", 2.2" and 2.8" SPI TFT LCD boards or "touch shields" that are commonly available from Adafruit and
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many other vendors. These are commonly 128x128, 128x160 or 240x320 (but the library supports rotation).
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I would also like to thank the excellent http://fastled.io/ project for creating the "FastPin.h" template header that allows
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for full speed GPIO while allowing the use of "friendly" Arduino pin numbering (it is included in the PDQ driver libraries).
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New features in latest commit ("v1.1.5" 2016-04-09) include:
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* Synced core functions with Adafruit_GFX (few changes - I think their clipping is still broken [fixed in PDQ_GFX])
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* Support for new fonts as seen in Adafruit_GFX GitHub
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* Minor bugfixes
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New features in latest commit ("v1.0.0" 2015-05-30) include:
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* Arduino IDE 1.6.x support (mainly information in library.properties, but also tested and 100% warning free).
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* New ATtiny85 support for IL934x using USI SPI (not quite as fast as 328P - but can run 20MHz PLL to make up).
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* New support for parallel ST7781 driver as used in Seeed Studio 2.8" Touch Shield (also sold by Radio Shack). This is the fastest LCD supported currently.
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* "Bit-banged" SPI support. Not as fast, but can use (nearly) any pins.
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* Added pushColor with a count that can speed up application rendering runs of same color.
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* Tidied up files and made sure all drivers were updated with latest tweaks.
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Suggestions, issues, bugs and comments welcome. Via https://hackaday.io/Xark or visit #Arduino channel on Freenode.net IRC.
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I have also posted a write-up about the development of this library at http://hackaday.io/Xark (describes most of the optimizations done).
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Issues
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------
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Currently, the library may only be used from the INO file in your project. You _cannot_ include it in a header file and
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use it from other CPP files. The current workaround is to write wrapper functions or classes, declare them in a header
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file, and then implement them in the INO file.
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