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examples: simplify screenshot client

This commit is contained in:
emersion 2018-03-14 19:21:36 +01:00
parent 85da9df807
commit 3bd1d876ae
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GPG Key ID: 0FDE7BE0E88F5E48
1 changed files with 31 additions and 150 deletions
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181
examples/screenshot.c
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@ -26,6 +26,7 @@
#include <errno.h> #include <errno.h>
#include <fcntl.h> #include <fcntl.h>
#include <limits.h> #include <limits.h>
#include <stdbool.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@ -36,33 +37,22 @@
#include <wayland-client.h> #include <wayland-client.h>
#include <wlr/util/log.h> #include <wlr/util/log.h>
#include "screenshooter-client-protocol.h" #include "screenshooter-client-protocol.h"
#include "util/os-compatibility.h"
static struct wl_shm *shm = NULL; static struct wl_shm *shm = NULL;
static struct orbital_screenshooter *screenshooter = NULL; static struct orbital_screenshooter *screenshooter = NULL;
static struct wl_list output_list; static struct wl_list output_list;
int min_x, min_y, max_x, max_y; static bool buffer_copy_done;
int buffer_copy_done;
struct screenshooter_output { struct screenshooter_output {
struct wl_output *output; struct wl_output *output;
struct wl_buffer *buffer; int width, height;
int width, height, offset_x, offset_y;
enum wl_output_transform transform;
void *data;
struct wl_list link; struct wl_list link;
}; };
static void output_handle_geometry(void *data, struct wl_output *wl_output, static void output_handle_geometry(void *data, struct wl_output *wl_output,
int x, int y, int physical_width, int physical_height, int subpixel, int x, int y, int physical_width, int physical_height, int subpixel,
const char *make, const char *model, int transform) { const char *make, const char *model, int transform) {
struct screenshooter_output *output = wl_output_get_user_data(wl_output); // No-op
if (wl_output == output->output) {
output->offset_x = x;
output->offset_y = y;
output->transform = transform;
}
} }
static void output_handle_mode(void *data, struct wl_output *wl_output, static void output_handle_mode(void *data, struct wl_output *wl_output,
@ -86,7 +76,7 @@ static const struct wl_output_listener output_listener = {
}; };
static void screenshot_done(void *data, struct orbital_screenshot *screenshot) { static void screenshot_done(void *data, struct orbital_screenshot *screenshot) {
buffer_copy_done = 1; buffer_copy_done = true;
} }
static const struct orbital_screenshot_listener screenshot_listener = { static const struct orbital_screenshot_listener screenshot_listener = {
@ -113,7 +103,7 @@ static void handle_global(void *data, struct wl_registry *registry,
static void handle_global_remove(void *data, struct wl_registry *registry, static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) { uint32_t name) {
// Unimplemented // Who cares?
} }
static const struct wl_registry_listener registry_listener = { static const struct wl_registry_listener registry_listener = {
@ -123,14 +113,15 @@ static const struct wl_registry_listener registry_listener = {
static int backingfile(off_t size) { static int backingfile(off_t size) {
char template[] = "/tmp/wlroots-shared-XXXXXX"; char template[] = "/tmp/wlroots-shared-XXXXXX";
int fd, ret; int fd = mkstemp(template);
fd = mkstemp(template);
if (fd < 0) { if (fd < 0) {
return -1; return -1;
} }
while ((ret = ftruncate(fd, size)) == EINTR) {} int ret;
while ((ret = ftruncate(fd, size)) == EINTR) {
// No-op
}
if (ret < 0) { if (ret < 0) {
close(fd); close(fd);
return -1; return -1;
@ -140,7 +131,6 @@ static int backingfile(off_t size) {
return fd; return fd;
} }
static struct wl_buffer *create_shm_buffer(int width, int height, static struct wl_buffer *create_shm_buffer(int width, int height,
void **data_out) { void **data_out) {
int stride = width * 4; int stride = width * 4;
@ -170,91 +160,8 @@ static struct wl_buffer *create_shm_buffer(int width, int height,
return buffer; return buffer;
} }
static void write_image(const char *filename, int width, int height) { static void write_image(const char *filename, int width, int height,
int buffer_stride = width * 4; void *data) {
void *data = calloc(1, buffer_stride * height);
if (!data) {
return;
}
struct screenshooter_output *output, *next;
wl_list_for_each_safe(output, next, &output_list, link) {
int output_stride = output->width * 4;
uint32_t *src = (uint32_t *)output->data;
uint32_t *dst = (uint32_t *)(data +
(output->offset_y - min_y) * buffer_stride +
(output->offset_x - min_x) * 4);
switch (output->transform) {
case WL_OUTPUT_TRANSFORM_NORMAL:
for (int i = 0; i < output->height; i++) {
memcpy(dst, src, output_stride);
dst += width;
src += output->width;
}
break;
case WL_OUTPUT_TRANSFORM_FLIPPED:
for (int i = 0; i < output->height; ++i) {
for (int j = 0; j < output->width; ++j) {
dst[i * width + j] =
src[i * output->width + output->width - 1 - j];
}
}
break;
case WL_OUTPUT_TRANSFORM_90:
for (int i = 0; i < output->width; ++i) {
for (int j = 0; j < output->height; ++j) {
dst[i * width + j] =
src[j * output->width + output->width - 1 - i];
}
}
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
for (int i = 0; i < output->width; ++i) {
for (int j = 0; j < output->height; ++j) {
dst[i * width + j] =
src[(output->height - 1 - j) * output->width + output->width - 1 - i];
}
}
break;
case WL_OUTPUT_TRANSFORM_180:
for (int i = 0; i < output->height; ++i) {
for (int j = 0; j < output->width; ++j) {
dst[i * width + j] =
src[(output->height - 1 - i) * output->width + output->width - 1 - j];
}
}
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
for (int i = 0; i < output->height; ++i) {
for (int j = 0; j < output->width; ++j) {
dst[i * width + j] =
src[(output->height - 1 - i) * output->width + j];
}
}
break;
case WL_OUTPUT_TRANSFORM_270:
for (int i = 0; i < output->width; ++i) {
for (int j = 0; j < output->height; ++j) {
dst[i * width + j] =
src[(output->height - 1 - j) * output->width + i];
}
}
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
for (int i = 0; i < output->width; ++i) {
for (int j = 0; j < output->height; ++j) {
dst[i * width + j] =
src[j * output->width + i];
}
}
break;
}
free(output);
}
char size[10 + 1 + 10 + 2 + 1]; // int32_t are max 10 digits char size[10 + 1 + 10 + 2 + 1]; // int32_t are max 10 digits
sprintf(size, "%dx%d+0", width, height); sprintf(size, "%dx%d+0", width, height);
@ -270,12 +177,11 @@ static void write_image(const char *filename, int width, int height) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} else if (child != 0) { } else if (child != 0) {
close(fd[0]); close(fd[0]);
if (write(fd[1], data, buffer_stride * height) < 0) { if (write(fd[1], data, 4 * width * height) < 0) {
fprintf(stderr, "write() failed: %s\n", strerror(errno)); fprintf(stderr, "write() failed: %s\n", strerror(errno));
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
close(fd[1]); close(fd[1]);
free(data);
waitpid(child, NULL, 0); waitpid(child, NULL, 0);
} else { } else {
close(fd[1]); close(fd[1]);
@ -293,38 +199,9 @@ static void write_image(const char *filename, int width, int height) {
} }
} }
static int set_buffer_size(int *width, int *height) {
int owidth, oheight;
min_x = min_y = INT_MAX;
max_x = max_y = INT_MIN;
struct screenshooter_output *output;
wl_list_for_each(output, &output_list, link) {
if (output->transform & 0x1) {
owidth = output->height;
oheight = output->width;
} else {
owidth = output->width;
oheight = output->height;
}
min_x = MIN(min_x, output->offset_x);
min_y = MIN(min_y, output->offset_y);
max_x = MAX(max_x, output->offset_x + owidth);
max_y = MAX(max_y, output->offset_y + oheight);
}
if (max_x <= min_x || max_y <= min_y) {
return -1;
}
*width = max_x - min_x;
*height = max_y - min_y;
return 0;
}
int main(int argc, char *argv[]) { int main(int argc, char *argv[]) {
wlr_log_init(L_DEBUG, NULL); wlr_log_init(L_DEBUG, NULL);
struct wl_display * display = wl_display_connect(NULL); struct wl_display * display = wl_display_connect(NULL);
if (display == NULL) { if (display == NULL) {
fprintf(stderr, "failed to create display: %m\n"); fprintf(stderr, "failed to create display: %m\n");
@ -342,27 +219,31 @@ int main(int argc, char *argv[]) {
return -1; return -1;
} }
int width, height; int i = 0;
if (set_buffer_size(&width, &height)) {
fprintf(stderr, "cannot set buffer size\n");
return -1;
}
struct screenshooter_output *output; struct screenshooter_output *output;
wl_list_for_each(output, &output_list, link) { wl_list_for_each(output, &output_list, link) {
output->buffer = create_shm_buffer(output->width, output->height, &output->data); void *data = NULL;
if (output->buffer == NULL) { struct wl_buffer *buffer =
create_shm_buffer(output->width, output->height, &data);
if (buffer == NULL) {
return -1; return -1;
} }
struct orbital_screenshot *screenshot = orbital_screenshooter_shoot( struct orbital_screenshot *screenshot = orbital_screenshooter_shoot(
screenshooter, output->output, output->buffer); screenshooter, output->output, buffer);
orbital_screenshot_add_listener(screenshot, &screenshot_listener, screenshot); orbital_screenshot_add_listener(screenshot, &screenshot_listener,
buffer_copy_done = 0; screenshot);
buffer_copy_done = false;
while (!buffer_copy_done) { while (!buffer_copy_done) {
wl_display_roundtrip(display); wl_display_roundtrip(display);
} }
char filename[24 + 10]; // int32_t are max 10 digits
snprintf(filename, sizeof(filename), "wayland-screenshot-%d.png", i);
write_image(filename, output->width, output->height, data);
wl_buffer_destroy(buffer);
++i;
} }
write_image("wayland-screenshot.png", width, height);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }