Rgb2Hires/Readme.md

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# Rgb2Hires
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This repository contains three "PC" projects:
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* **libRgb2Hires**: a library to convert RGB image to the Apple II's HIRES format
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* **Picture**: a program to convert a RGB png to a binary or an ASM excerpt, that can be loaded to the HIRES memory pages of an Apple II. An optional **live preview** can be displayed: its window will simulate an RGB monitor and will show the result, including color clashing and artifacts.
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* Source image must be 140x192. Pixels are anamorphic: they will be displayed twice wider than tall.
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* Source image must contains six colors : BLACK, WHITE, ORANGE, GREEN, BLUE and PURPLE. The color may be approximation of the Apple II 6 colors. Please refer to the provided pic.
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* **Tile**: given a RGB png tile sheet that satisfies the same requirements as above, it extracts a 14x16 tile and converts it to ASM data. This data **is not interleaved**.
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And one Apple II project:
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* **Loader**: a program that will load and display a picture generated by the *Picture* program. A bash scripts is provided as an exemple to load the picture and the loader on an image disk. [AppleCommander](https://applecommander.github.io/) is required to do so. Once in ProDOS, just type *-DISPLAY*.
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__Note:__ For more information about the "Hires" format and its limitations, you can refer to my [website](https://www.xtof.info/hires-graphics-apple-ii.html).
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## Windows / Linux projects (libHires, Picture, Tile)
### Dependencies
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* **Magick++** from ImageMagick 6 and **SDL2**
* On **Windows**
* ImageMagick
* Download ImageMagick 6 from the [official website](https://legacy.imagemagick.org/script/install-source.php).
* Compile it in *Dynamic Multithreaded*.
* Provide an environment variable called *MAGICK_HOME* and pointing to the root ImageMagick folder.
* Copy *ImageMagick-config* from the *script/* folder to *MAGICK_HOME*.
* SDL2
* Download the latest version of the *development library* from the [official website](https://www.libsdl.org/download-2.0.php) and unarchive it.
* Provide an environment variable called *SDL2_HOME* and pointing to the root of the SDL2 library.
* On **Linux**, install libmagick++-dev for version 6 and libsdl2-dev
> sudo apt install libmagick++-6.q16-dev libsdl2-dev
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### How to build
* **Linux** a CMakeList is provided:
> mkdir build && cd build
> cmake ..
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> cmake --build . --config release
* **Windows** a VisualStudio solution is provided
## Apple II project (Loader)
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### Dependencies
* [CC65](https://cc65.github.io/cc65/)
* The crosscompiler suit. Please provide an environment variable, *CC65_HOME* pointing to your CC65 folder.
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### Build
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> make
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## Test
A correct source image, *test.png*, is provided as an example. Convert it using Picture, then copy it on a dsk image along with the Apple II loader. You can use or refer to the provided script in the *Loader_Apple2* folder.
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### Demo
The live preview can help to visualise color clashing and artifacts. You can edit your file using *Photoshop* or any other application. The *Preview* window will be ubdated each tile the file is saved.
<video controls width="720">
<source src="https://pub.xtof.info/github/demo-rgb2hires.mp4"
type="video/mp4">
Sorry, your browser doesn't support embedded videos.
</video>