Rendertarget defaults to magenta in Metal (but is transparent on HTML5)

[oxue]

Rendertarget defaults to magenta in MacOS Metal (but is transparent on HTML5)

Steps to reproduce the behavior:

var i:Image = Image.createRenderTarget(100, 100, null, NoDepthAndStencil, 1);
frame.g2.begin(true, Color.Black);
frame.g2.drawImage(i, 0, 0);
frame.g2.end();

Expected behavior Both to be same

Screenshots

Execution Environment:

• Host system MACOS
• Target system MACOS
• IDE used vscode
• Kha revision: Latest vscode extension version

[RobDangerous]

Looks like there is no good way to clear a render-target when it is created in Metal. I hereby define the contents of new render-targets to be undefined (which is also the case in Metal actually according to the docs so it's not necessarily always magenta).

[RblSb]

Is backbuffer.g2.clear() fixes it?

[RobDangerous]

Well, that's one of many options to write the render-target-data and thereby get it into a defined state.