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CMakeLists.txt
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LICENSE
README.md
README.md

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This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.

About Wellspring

Wellspring is inspired by the design of Dear ImGui. It outputs buffer data that you can upload and render in your 3D application. This means that you can integrate it easily using the graphics library of your choice.

Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.

At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.

Using msdf-atlas-gen

A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.

Your atlas generation might look like this:

msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json

Dependencies

Wellspring depends on SDL3.

Building Wellspring

For *nix platforms, use CMake:

$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.

License

Wellspring is licensed under the zlib license. See LICENSE for details.

About

An immediate mode font rendering system in C.

Resources

Readme
License
Activity
Custom properties

Stars

39 stars

Watchers

2 watching

Forks

4 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
About
An immediate mode font rendering system in C.
Resources
Readme
License
Activity
Custom properties
Stars
39 stars
Watchers
2 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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.gitignore
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CMakeLists.txt
LICENSE
LICENSE
README.md
README.md
Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
About
An immediate mode font rendering system in C.
Resources
Readme
License
Activity
Custom properties
Stars
39 stars
Watchers
2 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CMakeLists.txt
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LICENSE
README.md
README.md
Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
About
An immediate mode font rendering system in C.
Resources
Readme
License
Activity
Custom properties
Stars
39 stars
Watchers
2 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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.github/workflows
include
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src
.gitignore
.gitignore
CMakeLists.txt
CMakeLists.txt
LICENSE
LICENSE
README.md
README.md
Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
About
An immediate mode font rendering system in C.
Resources
Readme
License
Activity
Custom properties
Stars
39 stars
Watchers
2 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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include
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src
.gitignore
.gitignore
CMakeLists.txt
CMakeLists.txt
LICENSE
LICENSE
README.md
README.md
Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
About
An immediate mode font rendering system in C.
Resources
Readme
License
Activity
Custom properties
Stars
39 stars
Watchers
2 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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include
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src
.gitignore
.gitignore
CMakeLists.txt
CMakeLists.txt
LICENSE
LICENSE
README.md
README.md
Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
About
An immediate mode font rendering system in C.
Resources
Readme
License
Activity
Custom properties
Stars
39 stars
Watchers
2 watching
Forks
4 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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CMakeLists.txt
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README.md
Repository files navigation
This is Wellspring, an immediate mode multiple-channel signed distance field font rendering system in C.
About Wellspring
Wellspring is inspired by the design of Dear ImGui.
It outputs buffer data that you can upload and render in your 3D application.
This means that you can integrate it easily using the graphics library of your choice.
Wellspring uses JSON output from msdf-atlas-gen version 1.3 to generate buffers. It also uses stb_truetype for additional kerning support. At render time, bind the image data from msdf-atlas-gen with buffers generated by Wellspring for beautiful MSDF font rendering.
At render time you will need to use a particular shader to render the MSDF data. See msdfgen for details.
Using msdf-atlas-gen
A full explanation of msdf-atlas-gen is beyond the scope of this project, but note that Wellspring only accepts MSDF atlas types with JSON output.
Your atlas generation might look like this:
msdf-atlas-gen -yorigin top -font ~/mygame/myfont.otf -imageout ~/mygame/content/forgotten_dream.png -json ~/mygame/content/forgotten_dream.json
Dependencies
Wellspring depends on SDL3.
Building Wellspring
For *nix platforms, use CMake:
$ mkdir build/
$ cd build
$ cmake ../
$ make

For Windows, you can use cmake-gui to generate a Visual Studio solution or use VSCode with the CMake and C/C++ Tools extensions.
License
Wellspring is licensed under the zlib license. See LICENSE for details.
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An immediate mode font rendering system in C.
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