SDL_render_gl.c: GL_RunCommandQueue: always set viewport_dirty on macOS Without this, moving the window changes the viewport and causes contents to render stretched. Fixes #1504
diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index 0728086..dbfcc41 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/src/render/opengl/SDL_render_gl.c
@@ -1169,6 +1169,12 @@ GL_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
}
}
+#ifdef __MACOSX__
+ // On macOS, moving the window seems to invalidate the OpenGL viewport state,
+ // so don't bother trying to persist it across frames; always reset it.
+ // Workaround for: https://github.com/libsdl-org/SDL/issues/1504
+ data->drawstate.viewport_dirty = SDL_TRUE;
+#endif
while (cmd) {
switch (cmd->command) {