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Example code of php-sdl/sdl3-ttf

Informations about the package sdl3-ttf

php-sdl3-ttf

CI PHP SDL3 SDL3_ttf Built with Zephir

PHP extension for SDL3_ttf — TrueType font rendering built with Zephir.

sdl3ttf wraps SDL3_ttf for PHP 8.2+, giving you hardware-quality TrueType and OpenType font rendering from plain PHP scripts. It links against the system libSDL3 and libSDL3_ttf, so glyph rasterisation is as fast as a native C program.

Pair it with php-sdl/sdl3 for windowing, rendering, and event handling — both extensions share the Sdl3* top-level namespace and can be loaded side-by-side.

Table of contents

Requirements

Component Minimum version Notes
PHP 8.2 ZTS and NTS builds both supported.
php-sdl/sdl3 any Required. Provides the SDL3 window, renderer, and surface types this extension works with.
SDL3 3.4.0 C library — must be discoverable via pkg-config sdl3.
SDL3_ttf 3.2 C library — must be discoverable via pkg-config SDL3_ttf (or sdl3-ttf / sdl3_ttf).
OS Linux / macOS Windows is not currently supported.
Compiler C11 toolchain gcc, clang, or Apple Clang.
php-dev / phpize matches PHP Required for any build path.

Tested on macOS (Apple Silicon + Intel), Debian Trixie, Raspberry Pi OS (arm64 / armhf), and NVIDIA JetPack 6 (Jetson Orin).

Installation

Via PHP PIE (recommended)

Install php-sdl/sdl3 first (required), then install this extension:

PIE handles the full build pipeline (phpize → configure → make → install) automatically. Make sure SDL3 ≥ 3.4.0 and SDL3_ttf ≥ 3.2 are already installed on the system before running — use the platform scripts below if they are not.

Platform installers

Three installer scripts live at the repository root. Each one installs SDL3 and SDL3_ttf if they are missing, builds the extension with Zephir, and enables it for every detected PHP SAPI.

macOS (Homebrew):

Debian Trixie / Raspberry Pi OS (amd64, arm64, armhf):

JetPack 6 / Ubuntu 22.04 (builds SDL3 + SDL3_ttf from source):

Each script writes a full build log to ./build.log and prints concise failure diagnostics if anything goes wrong.

Manual build with phpize

If the generated C source exists in ext/, you can build without Zephir:

Then enable the extension:

If SDL3 or SDL3_ttf is installed in a non-standard prefix, export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig before ./configure.

Verifying the install

Run the bundled proof-of-work script — it opens a system font, renders text to a surface, and reports dimensions. No display server required.

Expected output:

A one-liner sanity check:

Quick start

To draw the rendered surface on screen, pass $surface['ptr'] to the php-sdl/sdl3 renderer via SDLRender::SDLCreateTextureFromSurface().

API reference

All methods live on a single static class:

Sdl3ttf\SDLTTF\SDLTTF

Lifecycle

Method Returns Description
TTFInit() bool Initialise SDL3_ttf. Call once.
TTFQuit() void Shut down SDL3_ttf.

Font loading

Method Returns Description
TTFOpenFont(string $file, float $size) array Open a .ttf / .otf file at the given point size.
TTFCloseFont(int $ptr) void Close a font previously opened with TTFOpenFont.

TTFOpenFont returns an associative array with font metadata:

Returns [] on failure.

Text rendering

Method Returns Description
TTFRenderTextBlended(int $font, string $text, int $r, int $g, int $b, int $a, int $length = 0) array Render UTF-8 text to an ARGB SDL_Surface with alpha blending.

$font is the ptr value from TTFOpenFont. $r/$g/$b/$a are 0-255 colour components. $length is the byte length of text to render (0 = use the full string).

Returns an associative array describing the surface:

Returns [] on failure.

Companion extension

This extension handles font rendering only. For windowing, input, rendering, and the rest of SDL3, install php-sdl/sdl3 alongside it.

Both extensions can be loaded simultaneously — they use separate PHP module names (sdl3 and sdl3ttf) and do not conflict.

License

MIT © Project Saturn Studios, LLC.

All versions of sdl3-ttf with dependencies

PHP Build Version
Package Version
Requires php Version >=8.2
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