fix: update stencil if the output size changes (#178)

1 files changed, 21 insertions, 0 deletions

diff --git a/sway/desktop/fx_renderer/fx_stencilbuffer.c b/sway/desktop/fx_renderer/fx_stencilbuffer.c
new file mode 100644
index 00000000..5b99ff79
--- /dev/null
+++ b/sway/desktop/fx_renderer/fx_stencilbuffer.c
@@ -0,0 +1,21 @@
+#include <assert.h>
+#include <wlr/render/gles2.h>
+
+#include "sway/desktop/fx_renderer/fx_stencilbuffer.h"
+
+struct fx_stencilbuffer fx_stencilbuffer_create() {
+	return (struct fx_stencilbuffer) {
+		.rb = -1,
+		.width = -1,
+		.height = -1,
+	};
+}
+
+void fx_stencilbuffer_release(struct fx_stencilbuffer *stencil_buffer) {
+	if (stencil_buffer->rb != (uint32_t) -1 && stencil_buffer->rb) {
+		glDeleteRenderbuffers(1, &stencil_buffer->rb);
+	}
+	stencil_buffer->rb = -1;
+	stencil_buffer->width = -1;
+	stencil_buffer->height = -1;
+}