Move allocator stuff into new directory

Add render/allocator/ and include/render/allocator/ to hold
everything allocator-related.

include/render/allocator/allocator.h

@@ -0,0 +1,54 @@
+#ifndef RENDER_ALLOCATOR_ALLOCATOR_H
+#define RENDER_ALLOCATOR_ALLOCATOR_H
+
+#include <stdbool.h>
+#include <wayland-server-core.h>
+#include <wlr/render/drm_format_set.h>
+
+struct wlr_allocator;
+struct wlr_backend;
+struct wlr_renderer;
+
+struct wlr_allocator_interface {
+	struct wlr_buffer *(*create_buffer)(struct wlr_allocator *alloc,
+		int width, int height, const struct wlr_drm_format *format);
+	void (*destroy)(struct wlr_allocator *alloc);
+};
+
+struct wlr_allocator {
+	const struct wlr_allocator_interface *impl;
+
+	// Capabilites of the buffers created with this allocator
+	uint32_t buffer_caps;
+
+	struct {
+		struct wl_signal destroy;
+	} events;
+};
+
+/**
+ * Creates the adequate wlr_allocator given a backend and a renderer
+ */
+struct wlr_allocator *wlr_allocator_autocreate(struct wlr_backend *backend,
+	struct wlr_renderer *renderer);
+/**
+ * Destroy the allocator.
+ */
+void wlr_allocator_destroy(struct wlr_allocator *alloc);
+/**
+ * Allocate a new buffer.
+ *
+ * When the caller is done with it, they must unreference it by calling
+ * wlr_buffer_drop.
+ */
+struct wlr_buffer *wlr_allocator_create_buffer(struct wlr_allocator *alloc,
+	int width, int height, const struct wlr_drm_format *format);
+
+// For wlr_allocator implementors
+void wlr_allocator_init(struct wlr_allocator *alloc,
+	const struct wlr_allocator_interface *impl, uint32_t buffer_caps);
+
+struct wlr_allocator *allocator_autocreate_with_drm_fd(
+	struct wlr_backend *backend, struct wlr_renderer *renderer, int drm_fd);
+
+#endif

include/render/allocator/drm_dumb.h

@@ -0,0 +1,37 @@
+#ifndef RENDER_ALLOCATOR_DRM_DUMB_H
+#define RENDER_ALLOCATOR_DRM_DUMB_H
+
+#include <wlr/render/dmabuf.h>
+#include <wlr/types/wlr_buffer.h>
+#include "render/allocator/allocator.h"
+
+struct wlr_drm_dumb_buffer {
+	struct wlr_buffer base;
+	struct wl_list link; // wlr_drm_dumb_allocator::buffers
+
+	int drm_fd; // -1 if the allocator has been destroyed
+	struct wlr_dmabuf_attributes dmabuf;
+
+	uint32_t format;
+	uint32_t handle;
+	uint32_t stride;
+	uint32_t width, height;
+
+	uint64_t size;
+	void *data;
+};
+
+struct wlr_drm_dumb_allocator {
+	struct wlr_allocator base;
+	struct wl_list buffers; // wlr_drm_dumb_buffer::link
+	int drm_fd;
+};
+
+/**
+ * Creates a new drm dumb allocator from a DRM FD.
+ *
+ * Does not take ownership over the FD.
+ */
+struct wlr_allocator *wlr_drm_dumb_allocator_create(int fd);
+
+#endif

include/render/allocator/gbm.h

@@ -0,0 +1,34 @@
+#ifndef RENDER_ALLOCATOR_GBM_H
+#define RENDER_ALLOCATOR_GBM_H
+
+#include <gbm.h>
+#include <wlr/render/dmabuf.h>
+#include <wlr/types/wlr_buffer.h>
+#include "render/allocator/allocator.h"
+
+struct wlr_gbm_buffer {
+	struct wlr_buffer base;
+
+	struct wl_list link; // wlr_gbm_allocator.buffers
+
+	struct gbm_bo *gbm_bo; // NULL if the gbm_device has been destroyed
+	struct wlr_dmabuf_attributes dmabuf;
+};
+
+struct wlr_gbm_allocator {
+	struct wlr_allocator base;
+
+	int fd;
+	struct gbm_device *gbm_device;
+
+	struct wl_list buffers; // wlr_gbm_buffer.link
+};
+
+/**
+ * Creates a new GBM allocator from a DRM FD.
+ *
+ * Does not take ownership over the FD.
+ */
+struct wlr_allocator *wlr_gbm_allocator_create(int drm_fd);
+
+#endif

include/render/allocator/shm.h

@@ -0,0 +1,23 @@
+#ifndef RENDER_ALLOCATOR_SHM_H
+#define RENDER_ALLOCATOR_SHM_H
+
+#include <wlr/types/wlr_buffer.h>
+#include "render/allocator/allocator.h"
+
+struct wlr_shm_buffer {
+	struct wlr_buffer base;
+	struct wlr_shm_attributes shm;
+	void *data;
+	size_t size;
+};
+
+struct wlr_shm_allocator {
+	struct wlr_allocator base;
+};
+
+/**
+ * Creates a new shared memory allocator.
+ */
+struct wlr_allocator *wlr_shm_allocator_create(void);
+
+#endif