Emscripten: glCreateShader()

[szilardszaloki]

Hi there!
Although working, still calling glCreateShader(GL_FRAGMENT_SHADER); (GLES3/gl3.h) generates (glGetError() ==) GL_INVALID_ENUM (0x0500).
Best,
Szilard

[o-micron]

Hi, make sure you create a window with the correct major and minor gl context versions

....
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
GLFWwindow* window = glfwCreateWindow(620, 480, "WINDOW TITLE", 0, 0);
glfwMakeContextCurrent(window);
....

Here is a template project to help you get started https://github.com/o-micron/IntroToRendering

[szilardszaloki]

Hi Omar,
Thanks for getting back to me!
That's exactly what I'm doing. That doesn't seem to be an issue of context creation and in fact, I can get my fragment shader to compile, it's just that the above call to glCreateShader() generates an error.

[szilardszaloki]

Sorry, my bad.
It's not the call to glCreateShader(GL_FRAGMENT_SHADER); that generates the error, but a call to glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);. Though I still don't get why this should generate an error, it runs perfectly fine on desktop, too. I'll look into it.
Thanks!

[o-micron]

On a side note, don't forget that Emscripten will actually try to map the opengl stuff to webgl2 which is not 100% gles 3.0 but almost identical... you might have enumerations or features not available in webgl2 but available in gles 3.0, so double check that, it might be the problem ..