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