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screencopy: add capture_output_region support

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This commit is contained in:
emersion 2018-06-23 15:12:17 +01:00
parent 2b9cbaddf3
commit bf7560b7cd
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GPG Key ID: 0FDE7BE0E88F5E48
4 changed files with 93 additions and 27 deletions
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2
include/wlr/types/wlr_screencopy_v1.h
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@ -18,7 +18,7 @@ struct wlr_screencopy_frame_v1 {
struct wlr_screencopy_manager_v1 *manager;
struct wl_list link;
int32_t width, height;
struct wlr_box buffer_box;
struct wl_shm_buffer *buffer;

29
protocol/wlr-screencopy-unstable-v1.xml
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@ -43,16 +43,39 @@
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="start capturing">
Capture the next frame of a an entire output.
<description summary="capture an output">
Capture the next frame of an entire output.
</description>
<arg name="frame" type="new_id" interface="zwlr_screencopy_frame_v1"/>
<arg name="overlay_cursor" type="int"
summary="include custom client hardware cursor on top of the frame"/>
summary="composite cursor onto the frame"/>
<arg name="output" type="object" interface="wl_output"/>
</request>
<request name="capture_output_region">
<description summary="capture an output's region">
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.
</description>
<arg name="frame" type="new_id" interface="zwlr_screencopy_frame_v1"/>
<arg name="overlay_cursor" type="int"
summary="composite cursor onto the frame"/>
<arg name="output" type="object" interface="wl_output"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="width" type="int"/>
<arg name="height" type="int"/>
</request>
<request name="destroy" type="destructor">
<description summary="destroy the manager">
All objects created by the manager will still remain valid, until their

11
render/gles2/renderer.c
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@ -253,7 +253,8 @@ static bool gles2_read_pixels(struct wlr_renderer *wlr_renderer,
enum wl_shm_format wl_fmt, uint32_t *flags, uint32_t stride,
uint32_t width, uint32_t height, uint32_t src_x, uint32_t src_y,
uint32_t dst_x, uint32_t dst_y, void *data) {
gles2_get_renderer_in_context(wlr_renderer);
struct wlr_gles2_renderer *renderer =
gles2_get_renderer_in_context(wlr_renderer);
const struct wlr_gles2_pixel_format *fmt = get_gles2_format_from_wl(wl_fmt);
if (fmt == NULL) {
@ -266,13 +267,15 @@ static bool gles2_read_pixels(struct wlr_renderer *wlr_renderer,
// Make sure any pending drawing is finished before we try to read it
glFinish();
glGetError(); // Clear the error flag
unsigned char *p = data + dst_y * stride;
uint32_t pack_stride = width * fmt->bpp / 8;
if (pack_stride == stride && dst_x == 0 && flags != NULL) {
// Under these particular conditions, we can read the pixels with only
// one glReadPixels call
glReadPixels(src_x, src_y, width, height, fmt->gl_format,
fmt->gl_type, p);
glReadPixels(src_x, renderer->viewport_height - height - src_y,
width, height, fmt->gl_format, fmt->gl_type, p);
*flags = WLR_RENDERER_READ_PIXELS_Y_INVERT;
} else {
// Unfortunately GLES2 doesn't support GL_PACK_*, so we have to read
@ -288,7 +291,7 @@ static bool gles2_read_pixels(struct wlr_renderer *wlr_renderer,
POP_GLES2_DEBUG;
return true;
return (glGetError() == GL_NO_ERROR);
}
static bool gles2_format_supported(struct wlr_renderer *wlr_renderer,

78
types/wlr_screencopy_v1.c
View File

@ -28,10 +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);
if (output->width != frame->width || output->height != frame->height) {
zwlr_screencopy_frame_v1_send_failed(frame->resource);
return;
}
int x = frame->buffer_box.x;
int y = frame->buffer_box.y;
struct wl_shm_buffer *buffer = frame->buffer;
assert(buffer != NULL);
@ -45,7 +43,7 @@ static void frame_handle_output_swap_buffers(struct wl_listener *listener,
void *data = wl_shm_buffer_get_data(buffer);
uint32_t flags = 0;
bool ok = wlr_renderer_read_pixels(renderer, fmt, &flags, stride,
width, height, 0, 0, 0, 0, data);
width, height, x, y, 0, 0, data);
wl_shm_buffer_end_access(buffer);
if (!ok) {
@ -84,8 +82,8 @@ static void frame_handle_copy(struct wl_client *client,
return;
}
if (frame->width != wl_shm_buffer_get_width(buffer) ||
frame->height != wl_shm_buffer_get_height(buffer)) {
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");
@ -139,24 +137,37 @@ static struct wlr_screencopy_manager_v1 *manager_from_resource(
return wl_resource_get_user_data(resource);
}
static void manager_handle_capture_output(struct wl_client *client,
struct wl_resource *manager_resource, uint32_t id,
int32_t overlay_cursor, struct wl_resource *output_resource) {
struct wlr_screencopy_manager_v1 *manager =
manager_from_resource(manager_resource);
struct wlr_output *output = wlr_output_from_resource(output_resource);
static void capture_output(struct wl_client *client,
struct wlr_screencopy_manager_v1 *manager, uint32_t version, uint32_t id,
int32_t overlay_cursor, struct wlr_output *output,
const struct wlr_box *box) {
struct wlr_box buffer_box = {0};
if (box == NULL) {
buffer_box.width = output->width;
buffer_box.height = output->height;
} else {
int ow, oh;
wlr_output_effective_resolution(output, &ow, &oh);
buffer_box = *box;
wlr_box_transform(&buffer_box, output->transform, ow, oh, &buffer_box);
buffer_box.x *= output->scale;
buffer_box.y *= output->scale;
buffer_box.width *= output->scale;
buffer_box.height *= output->scale;
}
struct wlr_screencopy_frame_v1 *frame =
calloc(1, sizeof(struct wlr_screencopy_frame_v1));
if (frame == NULL) {
wl_resource_post_no_memory(manager_resource);
wl_client_post_no_memory(client);
return;
}
frame->manager = manager;
frame->output = output;
uint32_t version = wl_resource_get_version(manager_resource);
frame->resource = wl_resource_create(client,
&zwlr_screencopy_frame_v1_interface, version, id);
if (frame->resource == NULL) {
@ -171,11 +182,39 @@ static void manager_handle_capture_output(struct wl_client *client,
wl_list_init(&frame->output_swap_buffers.link);
frame->width = output->width;
frame->height = output->height;
// TODO: don't send zero
frame->buffer_box = buffer_box;
zwlr_screencopy_frame_v1_send_buffer(frame->resource,
frame->width, frame->height, 0, 0);
frame->buffer_box.width, frame->buffer_box.height,
WL_SHM_FORMAT_XRGB8888, 4 * frame->buffer_box.width);
}
static void manager_handle_capture_output(struct wl_client *client,
struct wl_resource *manager_resource, uint32_t id,
int32_t overlay_cursor, struct wl_resource *output_resource) {
struct wlr_screencopy_manager_v1 *manager =
manager_from_resource(manager_resource);
uint32_t version = wl_resource_get_version(manager_resource);
struct wlr_output *output = wlr_output_from_resource(output_resource);
capture_output(client, manager, version, id, overlay_cursor, output, NULL);
}
static void manager_handle_capture_output_region(struct wl_client *client,
struct wl_resource *manager_resource, uint32_t id,
int32_t overlay_cursor, struct wl_resource *output_resource,
int32_t x, int32_t y, int32_t width, int32_t height) {
struct wlr_screencopy_manager_v1 *manager =
manager_from_resource(manager_resource);
uint32_t version = wl_resource_get_version(manager_resource);
struct wlr_output *output = wlr_output_from_resource(output_resource);
struct wlr_box box = {
.x = x,
.y = y,
.width = width,
.height = height,
};
capture_output(client, manager, version, id, overlay_cursor, output, &box);
}
static void manager_handle_destroy(struct wl_client *client,
@ -185,6 +224,7 @@ static void manager_handle_destroy(struct wl_client *client,
static const struct zwlr_screencopy_manager_v1_interface manager_impl = {
.capture_output = manager_handle_capture_output,
.capture_output_region = manager_handle_capture_output_region,
.destroy = manager_handle_destroy,
};