From 1a6918f948be034e65c50af8969d090b5e762dc1 Mon Sep 17 00:00:00 2001
From: Erik Reider <35975961+ErikReider@users.noreply.github.com>
Date: Tue, 2 Jan 2024 01:15:34 +0100
Subject: Integrated the stencil rb into fx_framebuffer

Every fx_framebuffer will now have a stencil buffer
---
 render/fx_renderer/fx_framebuffer.c | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

(limited to 'render/fx_renderer/fx_framebuffer.c')

diff --git a/render/fx_renderer/fx_framebuffer.c b/render/fx_renderer/fx_framebuffer.c
index 3e52f49..fea101b 100644
--- a/render/fx_renderer/fx_framebuffer.c
+++ b/render/fx_renderer/fx_framebuffer.c
@@ -62,15 +62,32 @@ struct fx_framebuffer *fx_framebuffer_get_or_create(struct fx_renderer *renderer
 	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 		GL_RENDERBUFFER, buffer->rbo);
 	GLenum fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
-	glBindFramebuffer(GL_FRAMEBUFFER, 0);
-
-	pop_fx_debug(renderer);
-
 	if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
 		wlr_log(WLR_ERROR, "Failed to create FBO");
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
 		goto error_image;
 	}
 
+	// Init stencil buffer
+	glGenRenderbuffers(1, &buffer->sb);
+	glBindRenderbuffer(GL_RENDERBUFFER, buffer->sb);
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8,
+			wlr_buffer->width, wlr_buffer->height);
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
+			GL_RENDERBUFFER, buffer->sb);
+	fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+	if (fb_status != GL_FRAMEBUFFER_COMPLETE) {
+		wlr_log(WLR_ERROR,
+				"Stencil buffer incomplete, couldn't create! (FB status: %i)",
+				fb_status);
+		glBindFramebuffer(GL_FRAMEBUFFER, 0);
+		goto error_stencil;
+	}
+
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+	pop_fx_debug(renderer);
+
 	wlr_addon_init(&buffer->addon, &wlr_buffer->addons, renderer,
 		&buffer_addon_impl);
 
@@ -81,6 +98,8 @@ struct fx_framebuffer *fx_framebuffer_get_or_create(struct fx_renderer *renderer
 
 	return buffer;
 
+error_stencil:
+	glDeleteRenderbuffers(1, &buffer->sb);
 error_image:
 	wlr_egl_destroy_image(renderer->egl, buffer->image);
 error_buffer:
-- 
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