Function main

test/browser/html5_webgl.c:31–226

}

int main() {
  EmscriptenWebGLContextAttributes attrs;
  emscripten_webgl_init_context_attributes(&attrs);
  attrs.majorVersion = 2;
  attrs.proxyContextToMainThread = EMSCRIPTEN_WEBGL_CONTEXT_PROXY_FALLBACK;
  attrs.renderViaOffscreenBackBuffer = true;
  attrs.desynchronized = true;
  EMSCRIPTEN_WEBGL_CONTEXT_HANDLE context = emscripten_webgl_create_context("#canvas", &attrs);
  emscripten_webgl_make_context_current(context);

  // #8406: desynchronized should round-trip on browsers that support it.
  // Skipped for OffscreenCanvas, which doesn't honor it.
  if (EXPECT_DESYNCHRONIZED >= 0) {
    EmscriptenWebGLContextAttributes actualAttrs;
    emscripten_webgl_get_context_attributes(context, &actualAttrs);
    assert(actualAttrs.desynchronized == EXPECT_DESYNCHRONIZED);
  }

  // Test emscripten_webgl_get_supported_extensions() API
  char *extensions = emscripten_webgl_get_supported_extensions();
  assert(extensions);
  assert(strlen(extensions) > 0);
  assert(strstr(extensions, "WEBGL") != 0);
  free(extensions);

  // Test emscripten_webgl_get_parameter_d() API
  assert(emscripten_webgl_get_parameter_d(GL_BLUE_BITS) == 8);

  // Test emscripten_webgl_get_parameter_o() API
  GLuint buf;
  glGenBuffers(1, &buf);
  assert(buf != 0);
  glBindBuffer(GL_ARRAY_BUFFER, buf);
  assert(emscripten_webgl_get_parameter_o(GL_ARRAY_BUFFER_BINDING) == buf);

  // Test emscripten_webgl_get_parameter_utf8() API
  char *version = emscripten_webgl_get_parameter_utf8(GL_VERSION);
  assert(version);
  assert(strstr(version, "WebGL") != 0);
  free(version);

  // Test emscripten_webgl_get_parameter_i64v API
  int64_t components = 0;
  emscripten_webgl_get_parameter_i64v(GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS, &components);
  assert(components > 0);

  // Test emscripten_webgl_get_parameter_v API with truncated read length
  glViewport(1, 2, 3, 4);
  int viewport[4] = { 0, 0, 0, 0 };
  int numElements = emscripten_webgl_get_parameter_v(GL_VIEWPORT, viewport, 3, EMSCRIPTEN_WEBGL_PARAM_TYPE_INT);
  assert(numElements == 4);
  assert(viewport[0] == 1);
  assert(viewport[1] == 2);
  assert(viewport[2] == 3);
  assert(viewport[3] == 0);

  // Test emscripten_webgl_get_parameter_v API with full read length
  numElements = emscripten_webgl_get_parameter_v(GL_VIEWPORT, viewport, 4, EMSCRIPTEN_WEBGL_PARAM_TYPE_INT);