From b6a990da71b5b0947650a50dcf1a083acfce868c Mon Sep 17 00:00:00 2001
From: Erik Reider <35975961+ErikReider@users.noreply.github.com>
Date: Sat, 30 Dec 2023 12:45:04 +0100
Subject: Added fx_texture and fx_framebuffer

---
 include/render/fx_renderer/fx_renderer.h | 99 ++++++++++++++++++++++++++++++--
 1 file changed, 94 insertions(+), 5 deletions(-)

(limited to 'include/render/fx_renderer')

diff --git a/include/render/fx_renderer/fx_renderer.h b/include/render/fx_renderer/fx_renderer.h
index f569aa9..ffd31da 100644
--- a/include/render/fx_renderer/fx_renderer.h
+++ b/include/render/fx_renderer/fx_renderer.h
@@ -5,6 +5,7 @@
 #include <GLES2/gl2ext.h>
 #include <stdbool.h>
 #include <wlr/render/egl.h>
+#include <wlr/render/gles2.h>
 #include <wlr/render/wlr_texture.h>
 #include <wlr/util/addon.h>
 #include <wlr/util/box.h>
@@ -57,19 +58,70 @@ struct box_shadow_shader {
 	GLint corner_radius;
 };
 
+struct fx_framebuffer {
+	bool initialized;
+
+	GLuint fbo;
+	GLuint rbo;
+
+	struct wlr_buffer *wlr_buffer;
+	struct fx_renderer *renderer;
+	struct wl_list link; // fx_renderer.buffers
+	struct wlr_addon addon;
+
+	EGLImageKHR image;
+};
+
+struct fx_texture {
+	struct wlr_texture wlr_texture;
+	struct fx_renderer *fx_renderer;
+	struct wl_list link; // fx_renderer.textures
+
+	// Basically:
+	//   GL_TEXTURE_2D == mutable
+	//   GL_TEXTURE_EXTERNAL_OES == immutable
+	GLuint target;
+	GLuint tex;
+
+	EGLImageKHR image;
+
+	bool has_alpha;
+
+	// Only affects target == GL_TEXTURE_2D
+	uint32_t drm_format; // used to interpret upload data
+	// If imported from a wlr_buffer
+	struct wlr_buffer *buffer;
+	struct wlr_addon buffer_addon;
+};
+
 struct fx_renderer {
 	float projection[9];
 
+	int viewport_width, viewport_height;
+
+	struct wlr_output *wlr_output;
+
+	struct wlr_egl *egl;
+
 	struct fx_stencilbuffer stencil_buffer;
 
+	struct wl_list textures; // fx_texture.link
+	struct wl_list buffers; // fx_framebuffer.link
+
+	// The FBO and texture used by wlroots
+	GLuint wlr_main_buffer_fbo;
+	struct wlr_gles2_texture_attribs wlr_main_texture_attribs;
+
 	struct wlr_addon addon;
 
 	struct {
 		bool OES_egl_image_external;
+		bool OES_egl_image;
 	} exts;
 
 	struct {
 		PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES;
+		PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC glEGLImageTargetRenderbufferStorageOES;
 	} procs;
 
 	struct {
@@ -82,18 +134,55 @@ struct fx_renderer {
 	} shaders;
 };
 
-void fx_renderer_init_addon(struct wlr_egl *egl, struct wlr_addon_set *addons,
-		const void * owner);
+///
+/// fx_framebuffer
+///
+
+struct fx_framebuffer fx_framebuffer_create(void);
+
+void fx_framebuffer_bind(struct fx_framebuffer *buffer);
+
+void fx_framebuffer_bind_wlr_fbo(struct fx_renderer *renderer);
+
+void fx_framebuffer_update(struct fx_renderer *fx_renderer, struct fx_framebuffer *fx_buffer,
+		int width, int height);
+
+void fx_framebuffer_add_stencil_buffer(struct fx_framebuffer *buffer, int width, int height);
+
+void fx_framebuffer_release(struct fx_framebuffer *buffer);
+
+///
+/// fx_texture
+///
+
+struct fx_texture *fx_get_texture(struct wlr_texture *wlr_texture);
+
+struct fx_texture *fx_texture_from_buffer(struct fx_renderer *fx_renderer,
+	struct wlr_buffer *buffer);
+
+void fx_texture_destroy(struct fx_texture *texture);
+
+bool wlr_texture_is_fx(struct wlr_texture *wlr_texture);
+
+void wlr_gles2_texture_get_fx_attribs(struct fx_texture *texture,
+		struct wlr_gles2_texture_attribs *attribs);
+
+///
+/// fx_renderer
+///
+
+void fx_renderer_init_addon(struct wlr_egl *egl, struct wlr_output *output,
+		struct wlr_addon_set *addons, const void * owner);
 
 struct fx_renderer *fx_renderer_addon_find(struct wlr_addon_set *addons,
 		const void * owner);
 
-struct fx_renderer *fx_renderer_create(struct wlr_egl *egl);
-
-void fx_renderer_fini(struct fx_renderer *renderer);
+struct fx_renderer *fx_renderer_create(struct wlr_egl *egl, struct wlr_output *output);
 
 void fx_renderer_begin(struct fx_renderer *renderer, int width, int height);
 
+void fx_renderer_end(struct fx_renderer *renderer);
+
 void fx_renderer_clear(const float color[static 4]);
 
 void fx_renderer_scissor(struct wlr_box *box);
-- 
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