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585 lines
17 KiB
585 lines
17 KiB
#include <assert.h>
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#include <drm_fourcc.h>
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#include <stdlib.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_buffer.h>
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#include <wlr/types/wlr_drm.h>
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#include <wlr/types/wlr_linux_dmabuf_v1.h>
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#include <wlr/util/log.h>
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#include "render/pixel_format.h"
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#include "types/wlr_buffer.h"
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#include "util/signal.h"
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void wlr_buffer_init(struct wlr_buffer *buffer,
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const struct wlr_buffer_impl *impl, int width, int height) {
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assert(impl->destroy);
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if (impl->begin_data_ptr_access || impl->end_data_ptr_access) {
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assert(impl->begin_data_ptr_access && impl->end_data_ptr_access);
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}
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buffer->impl = impl;
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buffer->width = width;
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buffer->height = height;
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wl_signal_init(&buffer->events.destroy);
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wl_signal_init(&buffer->events.release);
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wlr_addon_set_init(&buffer->addons);
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}
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static void buffer_consider_destroy(struct wlr_buffer *buffer) {
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if (!buffer->dropped || buffer->n_locks > 0) {
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return;
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}
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assert(!buffer->accessing_data_ptr);
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wlr_signal_emit_safe(&buffer->events.destroy, NULL);
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wlr_addon_set_finish(&buffer->addons);
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buffer->impl->destroy(buffer);
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}
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void wlr_buffer_drop(struct wlr_buffer *buffer) {
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if (buffer == NULL) {
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return;
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}
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assert(!buffer->dropped);
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buffer->dropped = true;
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buffer_consider_destroy(buffer);
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}
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struct wlr_buffer *wlr_buffer_lock(struct wlr_buffer *buffer) {
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buffer->n_locks++;
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return buffer;
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}
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void wlr_buffer_unlock(struct wlr_buffer *buffer) {
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if (buffer == NULL) {
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return;
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}
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assert(buffer->n_locks > 0);
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buffer->n_locks--;
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if (buffer->n_locks == 0) {
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wl_signal_emit(&buffer->events.release, NULL);
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}
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buffer_consider_destroy(buffer);
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}
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bool wlr_buffer_get_dmabuf(struct wlr_buffer *buffer,
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struct wlr_dmabuf_attributes *attribs) {
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if (!buffer->impl->get_dmabuf) {
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return false;
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}
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return buffer->impl->get_dmabuf(buffer, attribs);
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}
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bool buffer_begin_data_ptr_access(struct wlr_buffer *buffer, uint32_t flags,
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void **data, uint32_t *format, size_t *stride) {
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assert(!buffer->accessing_data_ptr);
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if (!buffer->impl->begin_data_ptr_access) {
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return false;
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}
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if (!buffer->impl->begin_data_ptr_access(buffer, flags, data, format, stride)) {
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return false;
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}
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buffer->accessing_data_ptr = true;
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return true;
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}
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void buffer_end_data_ptr_access(struct wlr_buffer *buffer) {
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assert(buffer->accessing_data_ptr);
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buffer->impl->end_data_ptr_access(buffer);
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buffer->accessing_data_ptr = false;
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}
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bool wlr_buffer_get_shm(struct wlr_buffer *buffer,
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struct wlr_shm_attributes *attribs) {
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if (!buffer->impl->get_shm) {
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return false;
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}
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return buffer->impl->get_shm(buffer, attribs);
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}
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bool wlr_resource_is_buffer(struct wl_resource *resource) {
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return strcmp(wl_resource_get_class(resource), wl_buffer_interface.name) == 0;
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}
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static const struct wlr_buffer_impl client_buffer_impl;
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struct wlr_client_buffer *wlr_client_buffer_get(struct wlr_buffer *buffer) {
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if (buffer->impl != &client_buffer_impl) {
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return NULL;
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}
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return (struct wlr_client_buffer *)buffer;
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}
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static struct wlr_client_buffer *client_buffer_from_buffer(
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struct wlr_buffer *buffer) {
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struct wlr_client_buffer *client_buffer = wlr_client_buffer_get(buffer);
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assert(client_buffer != NULL);
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return client_buffer;
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}
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static void client_buffer_destroy(struct wlr_buffer *buffer) {
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struct wlr_client_buffer *client_buffer = client_buffer_from_buffer(buffer);
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wl_list_remove(&client_buffer->source_destroy.link);
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wlr_texture_destroy(client_buffer->texture);
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free(client_buffer);
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}
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static bool client_buffer_get_dmabuf(struct wlr_buffer *buffer,
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struct wlr_dmabuf_attributes *attribs) {
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struct wlr_client_buffer *client_buffer = client_buffer_from_buffer(buffer);
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if (client_buffer->source == NULL) {
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return false;
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}
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return wlr_buffer_get_dmabuf(client_buffer->source, attribs);
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}
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static const struct wlr_buffer_impl client_buffer_impl = {
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.destroy = client_buffer_destroy,
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.get_dmabuf = client_buffer_get_dmabuf,
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};
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static void client_buffer_handle_source_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_client_buffer *client_buffer =
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wl_container_of(listener, client_buffer, source_destroy);
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wl_list_remove(&client_buffer->source_destroy.link);
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wl_list_init(&client_buffer->source_destroy.link);
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client_buffer->source = NULL;
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}
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static struct wlr_shm_client_buffer *shm_client_buffer_get_or_create(
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struct wl_resource *resource);
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static bool buffer_is_shm_client_buffer(struct wlr_buffer *buffer);
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static struct wlr_shm_client_buffer *shm_client_buffer_from_buffer(
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struct wlr_buffer *buffer);
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/* struct wlr_buffer_resource_interface */
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static struct wl_array buffer_resource_interfaces = {0};
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void wlr_buffer_register_resource_interface(
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const struct wlr_buffer_resource_interface *iface) {
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assert(iface);
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assert(iface->is_instance);
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assert(iface->from_resource);
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const struct wlr_buffer_resource_interface **iface_ptr;
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wl_array_for_each(iface_ptr, &buffer_resource_interfaces) {
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if (*iface_ptr == iface) {
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wlr_log(WLR_DEBUG, "wlr_resource_buffer_interface %s has already"
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"been registered", iface->name);
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return;
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}
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}
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iface_ptr = wl_array_add(&buffer_resource_interfaces, sizeof(iface));
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*iface_ptr = iface;
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}
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static const struct wlr_buffer_resource_interface *get_buffer_resource_iface(
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struct wl_resource *resource) {
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struct wlr_buffer_resource_interface **iface_ptr;
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wl_array_for_each(iface_ptr, &buffer_resource_interfaces) {
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if ((*iface_ptr)->is_instance(resource)) {
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return *iface_ptr;
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}
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}
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return NULL;
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}
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struct wlr_buffer *wlr_buffer_from_resource(struct wl_resource *resource) {
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assert(resource && wlr_resource_is_buffer(resource));
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struct wlr_buffer *buffer;
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if (wl_shm_buffer_get(resource) != NULL) {
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struct wlr_shm_client_buffer *shm_client_buffer =
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shm_client_buffer_get_or_create(resource);
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if (shm_client_buffer == NULL) {
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wlr_log(WLR_ERROR, "Failed to create shm client buffer");
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return NULL;
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}
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buffer = wlr_buffer_lock(&shm_client_buffer->base);
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} else if (wlr_dmabuf_v1_resource_is_buffer(resource)) {
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struct wlr_dmabuf_v1_buffer *dmabuf =
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wlr_dmabuf_v1_buffer_from_buffer_resource(resource);
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buffer = wlr_buffer_lock(&dmabuf->base);
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} else if (wlr_drm_buffer_is_resource(resource)) {
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struct wlr_drm_buffer *drm_buffer =
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wlr_drm_buffer_from_resource(resource);
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buffer = wlr_buffer_lock(&drm_buffer->base);
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} else {
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const struct wlr_buffer_resource_interface *iface =
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get_buffer_resource_iface(resource);
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if (!iface) {
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wlr_log(WLR_ERROR, "Unknown buffer type");
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return NULL;
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}
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struct wlr_buffer *custom_buffer = iface->from_resource(resource);
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if (!custom_buffer) {
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wlr_log(WLR_ERROR, "Failed to create %s buffer", iface->name);
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return NULL;
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}
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buffer = wlr_buffer_lock(custom_buffer);
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}
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return buffer;
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}
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struct wlr_client_buffer *wlr_client_buffer_create(struct wlr_buffer *buffer,
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struct wlr_renderer *renderer) {
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struct wlr_texture *texture = wlr_texture_from_buffer(renderer, buffer);
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if (texture == NULL) {
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wlr_log(WLR_ERROR, "Failed to create texture");
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return NULL;
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}
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struct wlr_client_buffer *client_buffer =
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calloc(1, sizeof(struct wlr_client_buffer));
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if (client_buffer == NULL) {
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wlr_texture_destroy(texture);
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return NULL;
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}
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wlr_buffer_init(&client_buffer->base, &client_buffer_impl,
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texture->width, texture->height);
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client_buffer->source = buffer;
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client_buffer->texture = texture;
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wl_signal_add(&buffer->events.destroy, &client_buffer->source_destroy);
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client_buffer->source_destroy.notify = client_buffer_handle_source_destroy;
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if (buffer_is_shm_client_buffer(buffer)) {
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struct wlr_shm_client_buffer *shm_client_buffer =
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shm_client_buffer_from_buffer(buffer);
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client_buffer->shm_source_format = shm_client_buffer->format;
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} else {
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client_buffer->shm_source_format = DRM_FORMAT_INVALID;
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}
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// Ensure the buffer will be released before being destroyed
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wlr_buffer_lock(&client_buffer->base);
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wlr_buffer_drop(&client_buffer->base);
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return client_buffer;
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}
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bool wlr_client_buffer_apply_damage(struct wlr_client_buffer *client_buffer,
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struct wlr_buffer *next, pixman_region32_t *damage) {
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if (client_buffer->base.n_locks > 1) {
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// Someone else still has a reference to the buffer
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return false;
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}
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if ((uint32_t)next->width != client_buffer->texture->width ||
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(uint32_t)next->height != client_buffer->texture->height) {
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return false;
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}
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if (client_buffer->shm_source_format == DRM_FORMAT_INVALID) {
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// Uploading only damaged regions only works for wl_shm buffers and
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// mutable textures (created from wl_shm buffer)
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return false;
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}
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void *data;
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uint32_t format;
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size_t stride;
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if (!buffer_begin_data_ptr_access(next, WLR_BUFFER_DATA_PTR_ACCESS_READ,
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&data, &format, &stride)) {
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return false;
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}
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if (format != client_buffer->shm_source_format) {
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// Uploading to textures can't change the format
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buffer_end_data_ptr_access(next);
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return false;
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}
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int n;
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pixman_box32_t *rects = pixman_region32_rectangles(damage, &n);
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for (int i = 0; i < n; ++i) {
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pixman_box32_t *r = &rects[i];
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if (!wlr_texture_write_pixels(client_buffer->texture, stride,
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r->x2 - r->x1, r->y2 - r->y1, r->x1, r->y1,
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r->x1, r->y1, data)) {
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buffer_end_data_ptr_access(next);
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return false;
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}
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}
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buffer_end_data_ptr_access(next);
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return true;
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}
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static const struct wlr_buffer_impl shm_client_buffer_impl;
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static bool buffer_is_shm_client_buffer(struct wlr_buffer *buffer) {
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return buffer->impl == &shm_client_buffer_impl;
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}
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static struct wlr_shm_client_buffer *shm_client_buffer_from_buffer(
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struct wlr_buffer *buffer) {
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assert(buffer_is_shm_client_buffer(buffer));
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return (struct wlr_shm_client_buffer *)buffer;
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}
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static void shm_client_buffer_destroy(struct wlr_buffer *wlr_buffer) {
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struct wlr_shm_client_buffer *buffer =
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shm_client_buffer_from_buffer(wlr_buffer);
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wl_list_remove(&buffer->resource_destroy.link);
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wl_list_remove(&buffer->release.link);
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if (buffer->saved_shm_pool != NULL) {
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wl_shm_pool_unref(buffer->saved_shm_pool);
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}
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free(buffer);
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}
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static bool shm_client_buffer_begin_data_ptr_access(struct wlr_buffer *wlr_buffer,
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uint32_t flags, void **data, uint32_t *format, size_t *stride) {
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struct wlr_shm_client_buffer *buffer =
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shm_client_buffer_from_buffer(wlr_buffer);
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*format = buffer->format;
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*stride = buffer->stride;
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if (buffer->shm_buffer != NULL) {
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*data = wl_shm_buffer_get_data(buffer->shm_buffer);
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wl_shm_buffer_begin_access(buffer->shm_buffer);
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} else {
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*data = buffer->saved_data;
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}
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return true;
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}
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static void shm_client_buffer_end_data_ptr_access(struct wlr_buffer *wlr_buffer) {
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struct wlr_shm_client_buffer *buffer =
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shm_client_buffer_from_buffer(wlr_buffer);
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if (buffer->shm_buffer != NULL) {
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wl_shm_buffer_end_access(buffer->shm_buffer);
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}
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}
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static const struct wlr_buffer_impl shm_client_buffer_impl = {
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.destroy = shm_client_buffer_destroy,
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.begin_data_ptr_access = shm_client_buffer_begin_data_ptr_access,
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.end_data_ptr_access = shm_client_buffer_end_data_ptr_access,
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};
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static void shm_client_buffer_resource_handle_destroy(
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struct wl_listener *listener, void *data) {
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struct wlr_shm_client_buffer *buffer =
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wl_container_of(listener, buffer, resource_destroy);
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// In order to still be able to access the shared memory region, we need to
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// keep a reference to the wl_shm_pool
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buffer->saved_shm_pool = wl_shm_buffer_ref_pool(buffer->shm_buffer);
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buffer->saved_data = wl_shm_buffer_get_data(buffer->shm_buffer);
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// The wl_shm_buffer destroys itself with the wl_resource
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buffer->resource = NULL;
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buffer->shm_buffer = NULL;
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wl_list_remove(&buffer->resource_destroy.link);
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wl_list_init(&buffer->resource_destroy.link);
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// This might destroy the buffer
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wlr_buffer_drop(&buffer->base);
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}
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static void shm_client_buffer_handle_release(struct wl_listener *listener,
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void *data) {
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struct wlr_shm_client_buffer *buffer =
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wl_container_of(listener, buffer, release);
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if (buffer->resource != NULL) {
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wl_buffer_send_release(buffer->resource);
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}
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}
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static struct wlr_shm_client_buffer *shm_client_buffer_get_or_create(
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struct wl_resource *resource) {
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struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get(resource);
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assert(shm_buffer != NULL);
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struct wl_listener *resource_destroy_listener =
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wl_resource_get_destroy_listener(resource,
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shm_client_buffer_resource_handle_destroy);
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if (resource_destroy_listener != NULL) {
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struct wlr_shm_client_buffer *buffer =
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wl_container_of(resource_destroy_listener, buffer, resource_destroy);
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return buffer;
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}
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int32_t width = wl_shm_buffer_get_width(shm_buffer);
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int32_t height = wl_shm_buffer_get_height(shm_buffer);
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struct wlr_shm_client_buffer *buffer = calloc(1, sizeof(*buffer));
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if (buffer == NULL) {
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return NULL;
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}
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wlr_buffer_init(&buffer->base, &shm_client_buffer_impl, width, height);
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buffer->resource = resource;
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buffer->shm_buffer = shm_buffer;
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enum wl_shm_format wl_shm_format = wl_shm_buffer_get_format(shm_buffer);
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buffer->format = convert_wl_shm_format_to_drm(wl_shm_format);
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buffer->stride = wl_shm_buffer_get_stride(shm_buffer);
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buffer->resource_destroy.notify = shm_client_buffer_resource_handle_destroy;
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wl_resource_add_destroy_listener(resource, &buffer->resource_destroy);
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buffer->release.notify = shm_client_buffer_handle_release;
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wl_signal_add(&buffer->base.events.release, &buffer->release);
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return buffer;
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}
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static const struct wlr_buffer_impl readonly_data_buffer_impl;
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static struct wlr_readonly_data_buffer *readonly_data_buffer_from_buffer(
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struct wlr_buffer *buffer) {
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assert(buffer->impl == &readonly_data_buffer_impl);
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return (struct wlr_readonly_data_buffer *)buffer;
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}
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static void readonly_data_buffer_destroy(struct wlr_buffer *wlr_buffer) {
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struct wlr_readonly_data_buffer *buffer =
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readonly_data_buffer_from_buffer(wlr_buffer);
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free(buffer->saved_data);
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free(buffer);
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}
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static bool readonly_data_buffer_begin_data_ptr_access(struct wlr_buffer *wlr_buffer,
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uint32_t flags, void **data, uint32_t *format, size_t *stride) {
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struct wlr_readonly_data_buffer *buffer =
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readonly_data_buffer_from_buffer(wlr_buffer);
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if (buffer->data == NULL) {
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return false;
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}
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if (flags & WLR_BUFFER_DATA_PTR_ACCESS_WRITE) {
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return false;
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}
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*data = (void *)buffer->data;
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*format = buffer->format;
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*stride = buffer->stride;
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return true;
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}
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static void readonly_data_buffer_end_data_ptr_access(struct wlr_buffer *wlr_buffer) {
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// This space is intentionally left blank
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}
|
|
|
|
static const struct wlr_buffer_impl readonly_data_buffer_impl = {
|
|
.destroy = readonly_data_buffer_destroy,
|
|
.begin_data_ptr_access = readonly_data_buffer_begin_data_ptr_access,
|
|
.end_data_ptr_access = readonly_data_buffer_end_data_ptr_access,
|
|
};
|
|
|
|
struct wlr_readonly_data_buffer *readonly_data_buffer_create(uint32_t format,
|
|
size_t stride, uint32_t width, uint32_t height, const void *data) {
|
|
struct wlr_readonly_data_buffer *buffer = calloc(1, sizeof(*buffer));
|
|
if (buffer == NULL) {
|
|
return NULL;
|
|
}
|
|
wlr_buffer_init(&buffer->base, &readonly_data_buffer_impl, width, height);
|
|
|
|
buffer->data = data;
|
|
buffer->format = format;
|
|
buffer->stride = stride;
|
|
|
|
return buffer;
|
|
}
|
|
|
|
bool readonly_data_buffer_drop(struct wlr_readonly_data_buffer *buffer) {
|
|
bool ok = true;
|
|
|
|
if (buffer->base.n_locks > 0) {
|
|
size_t size = buffer->stride * buffer->base.height;
|
|
buffer->saved_data = malloc(size);
|
|
if (buffer->saved_data == NULL) {
|
|
wlr_log_errno(WLR_ERROR, "Allocation failed");
|
|
ok = false;
|
|
buffer->data = NULL;
|
|
// We can't destroy the buffer, or we risk use-after-free in the
|
|
// consumers. We can't allow accesses to buffer->data anymore, so
|
|
// set it to NULL and make subsequent begin_data_ptr_access()
|
|
// calls fail.
|
|
} else {
|
|
memcpy(buffer->saved_data, buffer->data, size);
|
|
buffer->data = buffer->saved_data;
|
|
}
|
|
}
|
|
|
|
wlr_buffer_drop(&buffer->base);
|
|
return ok;
|
|
}
|
|
|
|
static const struct wlr_buffer_impl dmabuf_buffer_impl;
|
|
|
|
static struct wlr_dmabuf_buffer *dmabuf_buffer_from_buffer(
|
|
struct wlr_buffer *buffer) {
|
|
assert(buffer->impl == &dmabuf_buffer_impl);
|
|
return (struct wlr_dmabuf_buffer *)buffer;
|
|
}
|
|
|
|
static void dmabuf_buffer_destroy(struct wlr_buffer *wlr_buffer) {
|
|
struct wlr_dmabuf_buffer *buffer = dmabuf_buffer_from_buffer(wlr_buffer);
|
|
if (buffer->saved) {
|
|
wlr_dmabuf_attributes_finish(&buffer->dmabuf);
|
|
}
|
|
free(buffer);
|
|
}
|
|
|
|
static bool dmabuf_buffer_get_dmabuf(struct wlr_buffer *wlr_buffer,
|
|
struct wlr_dmabuf_attributes *dmabuf) {
|
|
struct wlr_dmabuf_buffer *buffer = dmabuf_buffer_from_buffer(wlr_buffer);
|
|
if (buffer->dmabuf.n_planes == 0) {
|
|
return false;
|
|
}
|
|
*dmabuf = buffer->dmabuf;
|
|
return true;
|
|
}
|
|
|
|
static const struct wlr_buffer_impl dmabuf_buffer_impl = {
|
|
.destroy = dmabuf_buffer_destroy,
|
|
.get_dmabuf = dmabuf_buffer_get_dmabuf,
|
|
};
|
|
|
|
struct wlr_dmabuf_buffer *dmabuf_buffer_create(
|
|
struct wlr_dmabuf_attributes *dmabuf) {
|
|
struct wlr_dmabuf_buffer *buffer = calloc(1, sizeof(*buffer));
|
|
if (buffer == NULL) {
|
|
return NULL;
|
|
}
|
|
wlr_buffer_init(&buffer->base, &dmabuf_buffer_impl,
|
|
dmabuf->width, dmabuf->height);
|
|
|
|
buffer->dmabuf = *dmabuf;
|
|
|
|
return buffer;
|
|
}
|
|
|
|
bool dmabuf_buffer_drop(struct wlr_dmabuf_buffer *buffer) {
|
|
bool ok = true;
|
|
|
|
if (buffer->base.n_locks > 0) {
|
|
struct wlr_dmabuf_attributes saved_dmabuf = {0};
|
|
if (!wlr_dmabuf_attributes_copy(&saved_dmabuf, &buffer->dmabuf)) {
|
|
wlr_log(WLR_ERROR, "Failed to save DMA-BUF");
|
|
ok = false;
|
|
memset(&buffer->dmabuf, 0, sizeof(buffer->dmabuf));
|
|
} else {
|
|
buffer->dmabuf = saved_dmabuf;
|
|
buffer->saved = true;
|
|
}
|
|
}
|
|
|
|
wlr_buffer_drop(&buffer->base);
|
|
return ok;
|
|
}
|