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OpenGL: Avoid deprecated function when querying available extensions

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In OpenGL 3 and up, GL_EXTENSIONS is deprecated as an argument of
glGetString and glGetStringi should be used instead.
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reuk 2022-02-09 18:47:58 +00:00
parent d9f8ea74e9
commit 199885baa8
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1 changed files with 17 additions and 0 deletions
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modules/juce_opengl/opengl/juce_OpenGLHelpers.cpp
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@ -133,6 +133,23 @@ bool OpenGLHelpers::isExtensionSupported (const char* const extensionName)
jassert (extensionName != nullptr); // you must supply a genuine string for this.
jassert (isContextActive()); // An OpenGL context will need to be active before calling this.
if (getOpenGLVersion().major >= 3)
{
using GetStringi = const GLubyte* (*) (GLenum, GLuint);
if (auto* thisGlGetStringi = reinterpret_cast<GetStringi> (getExtensionFunction ("glGetStringi")))
{
GLint n = 0;
glGetIntegerv (GL_NUM_EXTENSIONS, &n);
for (auto i = (decltype (n)) 0; i < n; ++i)
if (StringRef (extensionName) == StringRef ((const char*) thisGlGetStringi (GL_EXTENSIONS, (GLuint) i)))
return true;
return false;
}
}
const char* extensions = (const char*) glGetString (GL_EXTENSIONS);
jassert (extensions != nullptr); // Perhaps you didn't activate an OpenGL context before calling this?