serafimarts / ffi-sdl-image

SDL2 Image FFI bindings for the PHP language

FFI SDL Image Bindings

A SDL_image extension FFI bindings for the PHP language compatible with SDL FFI bindings for the PHP language.

• System Requirements
• Installation
• Documentation
• Initialization
• Example

Requirements

• PHP ^8.1
• ext-ffi
• Windows, Linux, BSD or MacOS
  • Android, iOS or something else are not supported yet
• SDL and SDL Image >= 2.0

Installation

Library is available as composer repository and can be installed using the following command in a root of your project.

$ composer require serafim/ffi-sdl-image

Additional dependencies:

• Debian-based Linux: sudo apt install libsdl2-image-2.0-0 -y
• MacOS: brew install sdl2_image
• Window: Can be downloaded from here

Documentation

The library API completely supports and repeats the analogue in the C language.

• SDL2 Image official documentation

Initialization

In the case that you need a specific SDL instance, it should be passed explicitly:

$sdl = new Serafim\SDL\SDL(version: '2.28.3');
$image = new Serafim\SDL\Image\Image(sdl: $sdl);

// If no argument is passed, the latest initialized
// version will be used.
$image = new Serafim\SDL\Image\Image(sdl: null);

! It is recommended to always specify the SDL dependency explicitly.

To specify a library pathname explicitly, you can add the library argument to the Serafim\SDL\Image\Image constructor.

By default, the library will try to resolve the binary's pathname automatically.

// Load library from pathname (it may be relative or part of system-dependent path)
$image = new Serafim\SDL\Image\Image(library: __DIR__ . '/path/to/library.so');

// Try to automatically resolve library's pathname
$image = new Serafim\SDL\Image\Image(library: null);

You can also specify the library version explicitly. Depending on this version, the corresponding functions of the SDL Image will be available.

By default, the library will try to resolve SDL Image version automatically.

// Use v2.0.5 from string
$image = new Serafim\SDL\Image\Image(version: '2.0.5');

// Use v2.6.3 from predefined versions constant
$image = new Serafim\SDL\Image\Image(version: \Serafim\SDL\Image\Version::V2_6_3);

// Use latest supported version
$image = new Serafim\SDL\Image\Image(version: \Serafim\SDL\Image\Version::LATEST);

To speed up the header compiler, you can use any PSR-16 compatible cache driver.

$image = new Serafim\SDL\Image\Image(cache: new Psr16Cache(...));

In addition, you can control other preprocessor directives explicitly:

$pre = new \FFI\Preprocessor\Preprocessor();
$pre->define('true', 'false'); // happy debugging!

$image = new Serafim\SDL\Image\Image(pre: $pre);

Example

use Serafim\SDL\SDL;
use Serafim\SDL\Image\Image;

$sdl = new SDL();
$image = new Image(sdl: $sdl);

$sdl->SDL_Init(SDL::SDL_INIT_EVERYTHING);
$image->IMG_Init(Image::IMG_INIT_PNG);

$surface = $image->IMG_Load(__DIR__ . '/path/to/image.png');
$image->IMG_SaveJPG($surface, __DIR__ . '/path/to/image.jpg', quality: 80);


$image->IMG_Quit();
$sdl->SDL_Quit();

ffi-sdl-image's Issues

Add library versions support

PHP Fatal error: Uncaught FFI\Exception: Failed resolving C function 'IMG_isSVG' in /mnt/Development/opengl-demo/vendor/serafim/ffi-sdl/src/Loader/LibraryLoader.php:82