feat: add functions required by SwayFX (#35)

1 files changed, 55 insertions, 0 deletions

diff --git a/render/fx_renderer/fx_effect_framebuffers.c b/render/fx_renderer/fx_effect_framebuffers.c
new file mode 100644
index 0000000..4589b21
--- /dev/null
+++ b/render/fx_renderer/fx_effect_framebuffers.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <wlr/types/wlr_output.h>
+#include <wlr/util/addon.h>
+#include <wlr/util/log.h>
+
+#include "scenefx/render/fx_renderer/fx_effect_framebuffers.h"
+
+static void addon_handle_destroy(struct wlr_addon *addon) {
+	struct fx_effect_framebuffers *fbos = wl_container_of(addon, fbos, addon);
+	wlr_addon_finish(&fbos->addon);
+	free(fbos);
+}
+
+static const struct wlr_addon_interface fbos_addon_impl = {
+	.name = "fx_effect_framebuffers",
+	.destroy = addon_handle_destroy,
+};
+
+static bool fx_effect_framebuffers_assign(struct wlr_output *output,
+		struct fx_effect_framebuffers *fbos) {
+	wlr_addon_init(&fbos->addon, &output->addons, output, &fbos_addon_impl);
+	return true;
+}
+
+struct fx_effect_framebuffers *fx_effect_framebuffers_try_get(struct wlr_output *output) {
+	struct fx_effect_framebuffers *fbos = NULL;
+
+	struct wlr_addon *addon = wlr_addon_find(&output->addons, output,
+			&fbos_addon_impl);
+	if (!addon) {
+		goto create_new;
+		return NULL;
+	}
+
+	if (!(fbos = wl_container_of(addon, fbos, addon))) {
+		goto create_new;
+	}
+	return fbos;
+
+create_new:;
+	fbos = calloc(1, sizeof(*fbos));
+	if (!fbos) {
+		wlr_log(WLR_ERROR, "Could not allocate a fx_effect_framebuffers");
+		abort();
+	}
+	fbos->blur_buffer_dirty = false;
+
+	if (!fx_effect_framebuffers_assign(output, fbos)) {
+		wlr_log(WLR_ERROR, "Could not assign fx_effect_framebuffers to output: '%s'",
+				output->name);
+		abort();
+	}
+	return fbos;
+}