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screncopy: update protocol

This commit is contained in:
emersion 2018-06-23 18:41:40 +01:00
parent bf7560b7cd
commit c421700f3d
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GPG Key ID: 0FDE7BE0E88F5E48
4 changed files with 72 additions and 54 deletions
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56
examples/screencopy.c
View File

@ -44,11 +44,24 @@ static struct wl_output *output = NULL;
static struct {
struct wl_buffer *wl_buffer;
void *data;
enum wl_shm_format format;
int width, height, stride;
bool y_invert;
} buffer;
bool buffer_copy_done = false;
// wl_shm_format describes little-endian formats, ImageMagick uses big-endian
// formats.
static const struct {
enum wl_shm_format wl_format;
char *str_format;
} formats[] = {
{WL_SHM_FORMAT_XRGB8888, "BGRA"},
{WL_SHM_FORMAT_ARGB8888, "BGRA"},
{WL_SHM_FORMAT_XBGR8888, "RGBA"},
{WL_SHM_FORMAT_ABGR8888, "RGBA"},
};
static int backingfile(off_t size) {
char template[] = "/tmp/wlroots-shared-XXXXXX";
int fd = mkstemp(template);
@ -69,9 +82,8 @@ static int backingfile(off_t size) {
return fd;
}
static struct wl_buffer *create_shm_buffer(int width, int height,
int *stride_out, void **data_out) {
int stride = width * 4;
static struct wl_buffer *create_shm_buffer(enum wl_shm_format fmt,
int width, int height, int stride, void **data_out) {
int size = stride * height;
int fd = backingfile(size);
@ -90,21 +102,22 @@ static struct wl_buffer *create_shm_buffer(int width, int height,
struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
close(fd);
struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0, width, height,
stride, WL_SHM_FORMAT_XRGB8888);
stride, fmt);
wl_shm_pool_destroy(pool);
*data_out = data;
*stride_out = stride;
return buffer;
}
static void frame_handle_buffer(void *data,
struct zwlr_screencopy_frame_v1 *frame, uint32_t width, uint32_t height,
uint32_t format, uint32_t stride) {
struct zwlr_screencopy_frame_v1 *frame, uint32_t format,
uint32_t width, uint32_t height, uint32_t stride) {
buffer.format = format;
buffer.width = width;
buffer.height = height;
buffer.stride = stride;
buffer.wl_buffer =
create_shm_buffer(width, height, &buffer.stride, &buffer.data);
create_shm_buffer(format, width, height, stride, &buffer.data);
if (buffer.wl_buffer == NULL) {
fprintf(stderr, "failed to create buffer\n");
exit(EXIT_FAILURE);
@ -160,11 +173,26 @@ static const struct wl_registry_listener registry_listener = {
.global_remove = handle_global_remove,
};
static void write_image(char *filename, int width, int height, int stride,
bool y_invert, void *data) {
static void write_image(char *filename, enum wl_shm_format wl_fmt, int width,
int height, int stride, bool y_invert, void *data) {
char size[10 + 1 + 10 + 2 + 1]; // int32_t are max 10 digits
sprintf(size, "%dx%d+0", width, height);
const char *fmt_str = NULL;
for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); ++i) {
if (formats[i].wl_format == wl_fmt) {
fmt_str = formats[i].str_format;
break;
}
}
if (fmt_str == NULL) {
fprintf(stderr, "unsupported format %"PRIu32"\n", wl_fmt);
exit(EXIT_FAILURE);
}
char convert[strlen(fmt_str) + 3];
memcpy(convert, fmt_str, strlen(fmt_str) + 1);
strcat(convert, ":-");
int fd[2];
if (pipe(fd) != 0) {
fprintf(stderr, "cannot create pipe: %s\n", strerror(errno));
@ -191,9 +219,7 @@ static void write_image(char *filename, int width, int height, int stride,
}
close(fd[0]);
// We requested WL_SHM_FORMAT_XRGB8888 in little endian, so that's BGRA
// in big endian.
char *argv[11] = {"convert", "-depth", "8", "-size", size, "bgra:-",
char *argv[11] = {"convert", "-depth", "8", "-size", size, convert,
"-alpha", "opaque", filename, NULL};
if (y_invert) {
argv[8] = "-flip";
@ -241,8 +267,8 @@ int main(int argc, char *argv[]) {
// This space is intentionally left blank
}
write_image("wayland-screenshot.png", buffer.width, buffer.height,
buffer.stride, buffer.y_invert, buffer.data);
write_image("wayland-screenshot.png", buffer.format, buffer.width,
buffer.height, buffer.stride, buffer.y_invert, buffer.data);
wl_buffer_destroy(buffer.wl_buffer);
return EXIT_SUCCESS;

4
include/wlr/types/wlr_screencopy_v1.h
View File

@ -18,7 +18,9 @@ struct wlr_screencopy_frame_v1 {
struct wlr_screencopy_manager_v1 *manager;
struct wl_list link;
struct wlr_box buffer_box;
enum wl_shm_format format;
struct wlr_box box;
int stride;
struct wl_shm_buffer *buffer;

29
protocol/wlr-screencopy-unstable-v1.xml
View File

@ -43,11 +43,6 @@
source.
</description>
<enum name="error">
<entry name="invalid_output_region" value="0"
summary="tried to capture an invalid output region"/>
</enum>
<request name="capture_output">
<description summary="capture an output">
Capture the next frame of an entire output.
@ -63,8 +58,8 @@
Capture the next frame of an output's region.
The region is given in output logical coordinates, see
xdg_output.logical_size. Trying to capture a region spanning outside the
output extents is a protocol error.
xdg_output.logical_size. The region will be clipped to the output's
extents.
</description>
<arg name="frame" type="new_id" interface="zwlr_screencopy_frame_v1"/>
<arg name="overlay_cursor" type="int"
@ -90,7 +85,7 @@
When created, a "buffer" event will be sent. The client will then be able
to send a "copy" request. If the capture is successful, the compositor
will finally a "ready" event.
will send a "flags" followed by a "ready" event.
If the capture failed, the "failed" event is sent. This can happen anytime
before the "ready" event.
@ -104,14 +99,13 @@
Provides information about the frame's buffer. This event is sent once
as soon as the frame is created.
The client should then create a buffer with the provided width and
height, and send a copy request. It can optionally create a buffer with
the preferred format and stride.
The client should then create a buffer with the provided attributes, and
send a "copy" request.
</description>
<arg name="format" type="uint" summary="buffer format"/>
<arg name="width" type="uint" summary="buffer width"/>
<arg name="height" type="uint" summary="buffer height"/>
<arg name="format" type="uint" summary="preferred DRM_FORMAT"/>
<arg name="stride" type="uint" summary="preferred stride"/>
<arg name="stride" type="uint" summary="buffer stride"/>
</event>
<request name="copy">
@ -120,8 +114,8 @@
correct size, see zwlr_screencopy_frame_v1.buffer. The buffer needs to
have a supported format.
If the frame is successfully copied, a ready event is sent. Otherwise,
an abort event is sent.
If the frame is successfully copied, a "flags" and a "ready" events are
sent. Otherwise, a "failed" event is sent.
</description>
<arg name="buffer" type="object" interface="wl_buffer"/>
</request>
@ -129,9 +123,8 @@
<enum name="error">
<entry name="already_used" value="0"
summary="the object has already been used to copy a wl_buffer"/>
<entry name="invalid_format" value="1" summary="format not supported"/>
<entry name="invalid_dimensions" value="2"
summary="invalid width or height"/>
<entry name="invalid_buffer" value="1"
summary="buffer attributes are invalid"/>
</enum>
<enum name="flags" bitfield="true">

37
types/wlr_screencopy_v1.c
View File

@ -28,8 +28,8 @@ static void frame_handle_output_swap_buffers(struct wl_listener *listener,
wl_list_remove(&frame->output_swap_buffers.link);
wl_list_init(&frame->output_swap_buffers.link);
int x = frame->buffer_box.x;
int y = frame->buffer_box.y;
int x = frame->box.x;
int y = frame->box.y;
struct wl_shm_buffer *buffer = frame->buffer;
assert(buffer != NULL);
@ -66,27 +66,24 @@ static void frame_handle_copy(struct wl_client *client,
struct wl_resource *buffer_resource) {
struct wlr_screencopy_frame_v1 *frame = frame_from_resource(frame_resource);
struct wlr_output *output = frame->output;
struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
struct wl_shm_buffer *buffer = wl_shm_buffer_get(buffer_resource);
if (buffer == NULL) {
zwlr_screencopy_frame_v1_send_failed(frame_resource);
wl_resource_post_error(frame->resource,
ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER,
"unsupported buffer type");
return;
}
enum wl_shm_format fmt = wl_shm_buffer_get_format(buffer);
if (!wlr_renderer_format_supported(renderer, fmt)) {
int32_t width = wl_shm_buffer_get_width(buffer);
int32_t height = wl_shm_buffer_get_height(buffer);
int32_t stride = wl_shm_buffer_get_stride(buffer);
if (fmt != frame->format || width != frame->box.width ||
height != frame->box.height || stride != frame->stride) {
wl_resource_post_error(frame->resource,
ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_FORMAT,
"unsupported format %"PRIu32, fmt);
return;
}
if (frame->buffer_box.width != wl_shm_buffer_get_width(buffer) ||
frame->buffer_box.height != wl_shm_buffer_get_height(buffer)) {
wl_resource_post_error(frame->resource,
ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_DIMENSIONS,
"invalid width or height");
ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER,
"invalid buffer attributes");
return;
}
@ -165,7 +162,6 @@ static void capture_output(struct wl_client *client,
return;
}
frame->manager = manager;
frame->output = output;
frame->resource = wl_resource_create(client,
@ -182,10 +178,11 @@ static void capture_output(struct wl_client *client,
wl_list_init(&frame->output_swap_buffers.link);
frame->buffer_box = buffer_box;
zwlr_screencopy_frame_v1_send_buffer(frame->resource,
frame->buffer_box.width, frame->buffer_box.height,
WL_SHM_FORMAT_XRGB8888, 4 * frame->buffer_box.width);
frame->format = WL_SHM_FORMAT_XRGB8888;
frame->box = buffer_box;
frame->stride = 4 * buffer_box.width;
zwlr_screencopy_frame_v1_send_buffer(frame->resource, frame->format,
buffer_box.width, buffer_box.height, frame->stride);
}
static void manager_handle_capture_output(struct wl_client *client,