void
WebGLContext::GetExtension(JSContext* cx,
const nsAString& wideName,
JS::MutableHandle<JSObject*> retval,
dom::CallerType callerType,
ErrorResult& rv)
{
retval.set(nullptr);
if (IsContextLost())
return;
NS_LossyConvertUTF16toASCII name(wideName);
WebGLExtensionID ext = WebGLExtensionID::Unknown;
// step 1: figure what extension is wanted
for (size_t i = 0; i < size_t(WebGLExtensionID::Max); i++) {
WebGLExtensionID extension = WebGLExtensionID(i);
if (CompareWebGLExtensionName(name, GetExtensionString(extension))) {
ext = extension;
break;
}
}
if (ext == WebGLExtensionID::Unknown)
return;
// step 2: check if the extension is supported
if (!IsExtensionSupported(callerType, ext))
return;
// step 3: if the extension hadn't been previously been created, create it now, thus enabling it
WebGLExtensionBase* extObj = EnableSupportedExtension(callerType, ext);
if (!extObj)
return;
// Step 4: Enable any implied extensions.
switch (ext) {
case WebGLExtensionID::OES_texture_float:
EnableSupportedExtension(callerType,
WebGLExtensionID::WEBGL_color_buffer_float);
break;
case WebGLExtensionID::OES_texture_half_float:
EnableSupportedExtension(callerType,
WebGLExtensionID::EXT_color_buffer_half_float);
break;
default:
break;
}
retval.set(WebGLObjectAsJSObject(cx, extObj, rv));
}
void
WebGLContext::GetExtension(JSContext* cx, const nsAString& wideName,
JS::MutableHandle<JSObject*> retval, ErrorResult& rv)
{
retval.set(nullptr);
if (IsContextLost())
return;
NS_LossyConvertUTF16toASCII name(wideName);
WebGLExtensionID ext = WebGLExtensionID::Unknown;
// step 1: figure what extension is wanted
for (size_t i = 0; i < size_t(WebGLExtensionID::Max); i++) {
WebGLExtensionID extension = WebGLExtensionID(i);
if (CompareWebGLExtensionName(name, GetExtensionString(extension))) {
ext = extension;
break;
}
}
if (ext == WebGLExtensionID::Unknown) {
// We keep backward compatibility for these deprecated vendor-prefixed
// alias. Do not add new ones anymore. Hide it behind the
// webgl.enable-draft-extensions flag instead.
if (CompareWebGLExtensionName(name, "MOZ_WEBGL_lose_context")) {
ext = WebGLExtensionID::WEBGL_lose_context;
} else if (CompareWebGLExtensionName(name, "MOZ_WEBGL_compressed_texture_s3tc")) {
ext = WebGLExtensionID::WEBGL_compressed_texture_s3tc;
} else if (CompareWebGLExtensionName(name, "MOZ_WEBGL_compressed_texture_atc")) {
ext = WebGLExtensionID::WEBGL_compressed_texture_atc;
} else if (CompareWebGLExtensionName(name, "MOZ_WEBGL_compressed_texture_pvrtc")) {
ext = WebGLExtensionID::WEBGL_compressed_texture_pvrtc;
} else if (CompareWebGLExtensionName(name, "MOZ_WEBGL_depth_texture")) {
ext = WebGLExtensionID::WEBGL_depth_texture;
}
if (ext != WebGLExtensionID::Unknown) {
GenerateWarning("getExtension('%s'): MOZ_ prefixed WebGL extension"
" strings are deprecated. Support for them will be"
" removed in the future. Use unprefixed extension"
" strings. To get draft extensions, set the"
" webgl.enable-draft-extensions preference.",
name.get());
}
}
if (ext == WebGLExtensionID::Unknown)
return;
// step 2: check if the extension is supported
if (!IsExtensionSupported(cx, ext))
return;
// step 3: if the extension hadn't been previously been created, create it now, thus enabling it
WebGLExtensionBase* extObj = EnableSupportedExtension(cx, ext);
if (!extObj)
return;
// Step 4: Enable any implied extensions.
switch (ext) {
case WebGLExtensionID::OES_texture_float:
EnableSupportedExtension(cx, WebGLExtensionID::WEBGL_color_buffer_float);
break;
case WebGLExtensionID::OES_texture_half_float:
EnableSupportedExtension(cx, WebGLExtensionID::EXT_color_buffer_half_float);
break;
default:
break;
}
retval.set(WebGLObjectAsJSObject(cx, extObj, rv));
}
