Check srgb_support on other GL | ES as well. (#2012)

crates/egui_glow/src/painter.rs

@@ -116,7 +116,12 @@ impl Painter {
         let is_webgl_1 = shader == ShaderVersion::Es100;
         let header = shader.version_declaration();
         tracing::debug!("Shader header: {:?}.", header);
-        let srgb_support = gl.supported_extensions().contains("EXT_sRGB");
+        // Previously checking srgb_support on WebGL only, now we have to check on other GL | ES as well.
+        let srgb_support = gl.supported_extensions().contains("EXT_sRGB")
+            || gl.supported_extensions().contains("GL_EXT_sRGB")
+            || gl
+                .supported_extensions()
+                .contains("GL_ARB_framebuffer_sRGB");
         tracing::debug!("SRGB Support: {:?}.", srgb_support);
 
         let (post_process, srgb_support_define) = match (shader, srgb_support) {

crates/egui_glow/src/vao.rs

@@ -126,6 +126,7 @@ fn supports_vao(gl: &glow::Context) -> bool {
             let supported_extensions = gl.supported_extensions();
             tracing::debug!("Supported OpenGL extensions: {:?}", supported_extensions);
             supported_extensions.contains("OES_vertex_array_object")
+                || supported_extensions.contains("GL_OES_vertex_array_object")
         } else {
             true
         }
@@ -136,6 +137,7 @@ fn supports_vao(gl: &glow::Context) -> bool {
             let supported_extensions = gl.supported_extensions();
             tracing::debug!("Supported OpenGL extensions: {:?}", supported_extensions);
             supported_extensions.contains("OES_vertex_array_object")
+                || supported_extensions.contains("GL_OES_vertex_array_object")
         } else {
             true
         }