From b786c100133aea233f349979def7e3633b092c2d Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <[EMAIL REDACTED]>
Date: Fri, 26 Nov 2021 19:45:16 -0700
Subject: [PATCH] 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
---
src/render/opengl/SDL_render_gl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index 07280865e9..dbfcc414ca 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) {