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glfw & opengl emscripten builds #130

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f176251
Adding emscripten as build target for glfw & opengl. Also upping the …
hchac May 28, 2026
82fb14b
Adding quick comment to explain reasoning for treating WebGL 2.0 like…
hchac Jul 1, 2026
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5 changes: 5 additions & 0 deletions libraries/glfw.c3l/manifest.json
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Original file line number Diff line number Diff line change
@@ -1,6 +1,11 @@
{
"provides": "glfw",
"targets" : {
"emscripten" : {
"link-args" : [],
"dependencies" : [],
"linked-libraries" : []
},
"macos-x64" : {
"link-args" : [],
"dependencies" : [],
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28 changes: 20 additions & 8 deletions libraries/opengl.c3l/gl.c3
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Original file line number Diff line number Diff line change
Expand Up @@ -13734,12 +13734,24 @@ fn void load_all_gl(GLLoadFn load, int version) {

fn int load_gl_internal(GLLoadFn load)
{
getIntegerv = load("glGetIntegerv");
if (getIntegerv == null) return 0;
int major, minor;
getIntegerv((GLenum)GL_MAJOR_VERSION, &major);
getIntegerv((GLenum)GL_MINOR_VERSION, &minor);
int version = (major * 10) + minor;
load_all_gl(load, version);
return version;
getIntegerv = load("glGetIntegerv");
if (getIntegerv == null) return 0;
int major, minor;
getIntegerv((GLenum)GL_MAJOR_VERSION, &major);
getIntegerv((GLenum)GL_MINOR_VERSION, &minor);
// Treating WebGL 2.0 like OpenGL 3.3 in order to load as many of the
// functions defined for WebGL 2.0 as possible. Not all OpenGL 3.1 to 3.3
// functions are supported in WebGL 2.0, but there is overlap.
if (major == 3 && minor == 0)
{
getString = load("glGetString");
String version_str = ((ZString)getString((GLenum)GL_VERSION)).str_view();

@lerno lerno Jul 1, 2026

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Maybe add a comment like "Treat WebGL 2.0 as OpenGL 3.3"

if (version_str.contains("WebGL 2.0"))
{
minor = 3;
}
}
int version = (major * 10) + minor;
load_all_gl(load, version);
return version;
}
5 changes: 5 additions & 0 deletions libraries/opengl.c3l/manifest.json
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Original file line number Diff line number Diff line change
@@ -1,6 +1,11 @@
{
"provides" : "opengl",
"targets" : {
"emscripten" : {
"link-args" : [],
"dependencies" : [],
"linked-libraries" : []
},
"freebsd-x64" : {
"link-args" : [],
"dependencies" : [],
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