wlseeds/include/render/egl.h

#ifndef RENDER_EGL_H
#define RENDER_EGL_H

#include <wlr/render/egl.h>

struct wlr_egl_context {
	EGLDisplay display;
	EGLContext context;
	EGLSurface draw_surface;
	EGLSurface read_surface;
};

/**
 * Initializes an EGL context for the given DRM FD.
 *
 * Will attempt to load all possibly required API functions.
 */
struct wlr_egl *wlr_egl_create_with_drm_fd(int drm_fd);

/**
 * Frees all related EGL resources, makes the context not-current and
 * unbinds a bound wayland display.
 */
void wlr_egl_destroy(struct wlr_egl *egl);

/**
 * Binds the given display to the EGL instance.
 * This will allow clients to create EGL surfaces from wayland ones and render
 * to it.
 */
bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display);

/**
 * Creates an EGL image from the given wl_drm buffer resource.
 */
EGLImageKHR wlr_egl_create_image_from_wl_drm(struct wlr_egl *egl,
	struct wl_resource *data, EGLint *fmt, int *width, int *height,
	bool *inverted_y);

/**
 * Creates an EGL image from the given dmabuf attributes. Check usability
 * of the dmabuf with wlr_egl_check_import_dmabuf once first.
 */
EGLImageKHR wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
	struct wlr_dmabuf_attributes *attributes, bool *external_only);

/**
 * Get DMA-BUF formats suitable for sampling usage.
 */
const struct wlr_drm_format_set *wlr_egl_get_dmabuf_texture_formats(
	struct wlr_egl *egl);
/**
 * Get DMA-BUF formats suitable for rendering usage.
 */
const struct wlr_drm_format_set *wlr_egl_get_dmabuf_render_formats(
	struct wlr_egl *egl);

/**
 * Destroys an EGL image created with the given wlr_egl.
 */
bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImageKHR image);

int wlr_egl_dup_drm_fd(struct wlr_egl *egl);

/**
 * Save the current EGL context to the structure provided in the argument.
 *
 * This includes display, context, draw surface and read surface.
 */
void wlr_egl_save_context(struct wlr_egl_context *context);

/**
 * Restore EGL context that was previously saved using wlr_egl_save_current().
 */
bool wlr_egl_restore_context(struct wlr_egl_context *context);

#endif