396 lines
12 KiB
C
396 lines
12 KiB
C
#include <assert.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_output.h>
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#include <wlr/types/wlr_screencopy_v1.h>
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#include <wlr/backend.h>
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#include <wlr/util/log.h>
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#include "wlr-screencopy-unstable-v1-protocol.h"
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#include "util/signal.h"
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#define SCREENCOPY_MANAGER_VERSION 1
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static const struct zwlr_screencopy_frame_v1_interface frame_impl;
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static struct wlr_screencopy_frame_v1 *frame_from_resource(
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struct wl_resource *resource) {
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assert(wl_resource_instance_of(resource,
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&zwlr_screencopy_frame_v1_interface, &frame_impl));
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return wl_resource_get_user_data(resource);
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}
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static void frame_destroy(struct wlr_screencopy_frame_v1 *frame) {
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if (frame == NULL) {
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return;
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}
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if (frame->output != NULL && frame->buffer != NULL) {
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wlr_output_lock_attach_render(frame->output, false);
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if (frame->cursor_locked) {
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wlr_output_lock_software_cursors(frame->output, false);
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}
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}
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wl_list_remove(&frame->link);
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wl_list_remove(&frame->output_precommit.link);
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wl_list_remove(&frame->output_destroy.link);
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wl_list_remove(&frame->output_enable.link);
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wl_list_remove(&frame->buffer_destroy.link);
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// Make the frame resource inert
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wl_resource_set_user_data(frame->resource, NULL);
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free(frame);
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}
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static void frame_handle_output_precommit(struct wl_listener *listener,
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void *_data) {
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struct wlr_screencopy_frame_v1 *frame =
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wl_container_of(listener, frame, output_precommit);
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struct wlr_output_event_precommit *event = _data;
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struct wlr_output *output = frame->output;
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struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
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assert(renderer);
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if (!(output->pending.committed & WLR_OUTPUT_STATE_BUFFER)) {
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return;
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}
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wl_list_remove(&frame->output_precommit.link);
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wl_list_init(&frame->output_precommit.link);
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int x = frame->box.x;
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int y = frame->box.y;
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struct wl_shm_buffer *buffer = frame->buffer;
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assert(buffer != NULL);
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enum wl_shm_format fmt = wl_shm_buffer_get_format(buffer);
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int32_t width = wl_shm_buffer_get_width(buffer);
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int32_t height = wl_shm_buffer_get_height(buffer);
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int32_t stride = wl_shm_buffer_get_stride(buffer);
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wl_shm_buffer_begin_access(buffer);
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void *data = wl_shm_buffer_get_data(buffer);
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uint32_t flags = 0;
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bool ok = wlr_renderer_read_pixels(renderer, fmt, &flags, stride,
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width, height, x, y, 0, 0, data);
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wl_shm_buffer_end_access(buffer);
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if (!ok) {
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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return;
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}
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zwlr_screencopy_frame_v1_send_flags(frame->resource, flags);
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time_t tv_sec = event->when->tv_sec;
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uint32_t tv_sec_hi = (sizeof(tv_sec) > 4) ? tv_sec >> 32 : 0;
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uint32_t tv_sec_lo = tv_sec & 0xFFFFFFFF;
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zwlr_screencopy_frame_v1_send_ready(frame->resource,
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tv_sec_hi, tv_sec_lo, event->when->tv_nsec);
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frame_destroy(frame);
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}
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static void frame_handle_output_enable(struct wl_listener *listener,
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void *data) {
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struct wlr_screencopy_frame_v1 *frame =
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wl_container_of(listener, frame, output_enable);
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if (!frame->output->enabled) {
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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}
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}
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static void frame_handle_output_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_screencopy_frame_v1 *frame =
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wl_container_of(listener, frame, output_destroy);
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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}
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static void frame_handle_buffer_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_screencopy_frame_v1 *frame =
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wl_container_of(listener, frame, buffer_destroy);
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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}
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static void frame_handle_copy(struct wl_client *client,
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struct wl_resource *frame_resource,
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struct wl_resource *buffer_resource) {
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struct wlr_screencopy_frame_v1 *frame = frame_from_resource(frame_resource);
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if (frame == NULL) {
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return;
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}
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struct wlr_output *output = frame->output;
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if (!output->enabled) {
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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return;
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}
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struct wl_shm_buffer *buffer = wl_shm_buffer_get(buffer_resource);
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if (buffer == NULL) {
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wl_resource_post_error(frame->resource,
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ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER,
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"unsupported buffer type");
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return;
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}
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enum wl_shm_format fmt = wl_shm_buffer_get_format(buffer);
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int32_t width = wl_shm_buffer_get_width(buffer);
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int32_t height = wl_shm_buffer_get_height(buffer);
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int32_t stride = wl_shm_buffer_get_stride(buffer);
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if (fmt != frame->format || width != frame->box.width ||
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height != frame->box.height || stride != frame->stride) {
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wl_resource_post_error(frame->resource,
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ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER,
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"invalid buffer attributes");
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return;
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}
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if (!wl_list_empty(&frame->output_precommit.link) ||
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frame->buffer != NULL) {
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wl_resource_post_error(frame->resource,
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ZWLR_SCREENCOPY_FRAME_V1_ERROR_ALREADY_USED,
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"frame already used");
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return;
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}
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frame->buffer = buffer;
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wl_signal_add(&output->events.precommit, &frame->output_precommit);
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frame->output_precommit.notify = frame_handle_output_precommit;
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wl_signal_add(&output->events.destroy, &frame->output_enable);
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frame->output_enable.notify = frame_handle_output_enable;
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wl_signal_add(&output->events.destroy, &frame->output_destroy);
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frame->output_destroy.notify = frame_handle_output_destroy;
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wl_resource_add_destroy_listener(buffer_resource, &frame->buffer_destroy);
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frame->buffer_destroy.notify = frame_handle_buffer_destroy;
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// Schedule a buffer commit
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output->needs_frame = true;
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wlr_output_schedule_frame(output);
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wlr_output_lock_attach_render(output, true);
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if (frame->overlay_cursor) {
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wlr_output_lock_software_cursors(output, true);
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frame->cursor_locked = true;
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}
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}
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static void frame_handle_destroy(struct wl_client *client,
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struct wl_resource *frame_resource) {
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wl_resource_destroy(frame_resource);
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}
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static const struct zwlr_screencopy_frame_v1_interface frame_impl = {
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.copy = frame_handle_copy,
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.destroy = frame_handle_destroy,
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};
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static void frame_handle_resource_destroy(struct wl_resource *frame_resource) {
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struct wlr_screencopy_frame_v1 *frame = frame_from_resource(frame_resource);
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frame_destroy(frame);
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}
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static const struct zwlr_screencopy_manager_v1_interface manager_impl;
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static struct wlr_screencopy_manager_v1 *manager_from_resource(
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struct wl_resource *resource) {
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assert(wl_resource_instance_of(resource,
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&zwlr_screencopy_manager_v1_interface, &manager_impl));
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return wl_resource_get_user_data(resource);
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}
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static void capture_output(struct wl_client *client,
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struct wlr_screencopy_manager_v1 *manager, uint32_t version, uint32_t id,
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int32_t overlay_cursor, struct wlr_output *output,
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const struct wlr_box *box) {
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struct wlr_screencopy_frame_v1 *frame =
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calloc(1, sizeof(struct wlr_screencopy_frame_v1));
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if (frame == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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frame->manager = manager;
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frame->output = output;
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frame->overlay_cursor = !!overlay_cursor;
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frame->resource = wl_resource_create(client,
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&zwlr_screencopy_frame_v1_interface, version, id);
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if (frame->resource == NULL) {
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free(frame);
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(frame->resource, &frame_impl, frame,
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frame_handle_resource_destroy);
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wl_list_insert(&manager->frames, &frame->link);
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wl_list_init(&frame->output_precommit.link);
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wl_list_init(&frame->output_enable.link);
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wl_list_init(&frame->output_destroy.link);
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wl_list_init(&frame->buffer_destroy.link);
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if (output == NULL || !output->enabled) {
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goto error;
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}
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struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
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assert(renderer);
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if (!wlr_output_preferred_read_format(frame->output, &frame->format)) {
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wlr_log(WLR_ERROR,
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"Failed to capture output: no read format supported by renderer");
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goto error;
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}
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struct wlr_box buffer_box = {0};
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if (box == NULL) {
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buffer_box.width = output->width;
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buffer_box.height = output->height;
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} else {
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int ow, oh;
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wlr_output_effective_resolution(output, &ow, &oh);
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buffer_box = *box;
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wlr_box_transform(&buffer_box, &buffer_box, output->transform, ow, oh);
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buffer_box.x *= output->scale;
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buffer_box.y *= output->scale;
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buffer_box.width *= output->scale;
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buffer_box.height *= output->scale;
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}
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frame->box = buffer_box;
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frame->stride = 4 * buffer_box.width; // TODO: depends on read format
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zwlr_screencopy_frame_v1_send_buffer(frame->resource, frame->format,
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buffer_box.width, buffer_box.height, frame->stride);
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return;
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error:
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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}
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static void manager_handle_capture_output(struct wl_client *client,
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struct wl_resource *manager_resource, uint32_t id,
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int32_t overlay_cursor, struct wl_resource *output_resource) {
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struct wlr_screencopy_manager_v1 *manager =
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manager_from_resource(manager_resource);
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uint32_t version = wl_resource_get_version(manager_resource);
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struct wlr_output *output = wlr_output_from_resource(output_resource);
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capture_output(client, manager, version, id, overlay_cursor, output, NULL);
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}
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static void manager_handle_capture_output_region(struct wl_client *client,
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struct wl_resource *manager_resource, uint32_t id,
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int32_t overlay_cursor, struct wl_resource *output_resource,
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int32_t x, int32_t y, int32_t width, int32_t height) {
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struct wlr_screencopy_manager_v1 *manager =
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manager_from_resource(manager_resource);
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uint32_t version = wl_resource_get_version(manager_resource);
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struct wlr_output *output = wlr_output_from_resource(output_resource);
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struct wlr_box box = {
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.x = x,
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.y = y,
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.width = width,
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.height = height,
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};
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capture_output(client, manager, version, id, overlay_cursor, output, &box);
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}
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static void manager_handle_destroy(struct wl_client *client,
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struct wl_resource *manager_resource) {
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wl_resource_destroy(manager_resource);
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}
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static const struct zwlr_screencopy_manager_v1_interface manager_impl = {
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.capture_output = manager_handle_capture_output,
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.capture_output_region = manager_handle_capture_output_region,
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.destroy = manager_handle_destroy,
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};
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void manager_handle_resource_destroy(struct wl_resource *resource) {
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wl_list_remove(wl_resource_get_link(resource));
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}
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static void manager_bind(struct wl_client *client, void *data, uint32_t version,
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uint32_t id) {
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struct wlr_screencopy_manager_v1 *manager = data;
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struct wl_resource *resource = wl_resource_create(client,
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&zwlr_screencopy_manager_v1_interface, version, id);
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if (resource == NULL) {
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wl_client_post_no_memory(client);
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return;
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}
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wl_resource_set_implementation(resource, &manager_impl, manager,
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manager_handle_resource_destroy);
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wl_list_insert(&manager->resources, wl_resource_get_link(resource));
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}
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static void handle_display_destroy(struct wl_listener *listener, void *data) {
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struct wlr_screencopy_manager_v1 *manager =
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wl_container_of(listener, manager, display_destroy);
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wlr_screencopy_manager_v1_destroy(manager);
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}
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struct wlr_screencopy_manager_v1 *wlr_screencopy_manager_v1_create(
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struct wl_display *display) {
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struct wlr_screencopy_manager_v1 *manager =
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calloc(1, sizeof(struct wlr_screencopy_manager_v1));
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if (manager == NULL) {
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return NULL;
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}
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manager->global = wl_global_create(display,
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&zwlr_screencopy_manager_v1_interface, SCREENCOPY_MANAGER_VERSION,
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manager, manager_bind);
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if (manager->global == NULL) {
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free(manager);
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return NULL;
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}
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wl_list_init(&manager->resources);
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wl_list_init(&manager->frames);
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wl_signal_init(&manager->events.destroy);
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manager->display_destroy.notify = handle_display_destroy;
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wl_display_add_destroy_listener(display, &manager->display_destroy);
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return manager;
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}
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void wlr_screencopy_manager_v1_destroy(
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struct wlr_screencopy_manager_v1 *manager) {
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if (manager == NULL) {
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return;
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}
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wlr_signal_emit_safe(&manager->events.destroy, manager);
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wl_list_remove(&manager->display_destroy.link);
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struct wlr_screencopy_frame_v1 *frame, *tmp_frame;
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wl_list_for_each_safe(frame, tmp_frame, &manager->frames, link) {
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wl_resource_destroy(frame->resource);
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}
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struct wl_resource *resource, *tmp_resource;
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wl_resource_for_each_safe(resource, tmp_resource, &manager->resources) {
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wl_resource_destroy(resource);
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}
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wl_global_destroy(manager->global);
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free(manager);
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}
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