diff options
| -rw-r--r-- | examples/screenshot.c | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/examples/screenshot.c b/examples/screenshot.c index 253638c9..3dcab09d 100644 --- a/examples/screenshot.c +++ b/examples/screenshot.c @@ -27,6 +27,7 @@ #include <stdlib.h> #include <string.h> #include <sys/mman.h> +#include <sys/wait.h> #include <unistd.h> #include <fcntl.h> #include <errno.h> @@ -184,7 +185,7 @@ static void argb_to_rgba(uint32_t *data, size_t height, size_t stride) { } static void -write_png(int width, int height) +write_image(const char *filename, int width, int height) { int output_stride, buffer_stride, i; void *data, *d, *s; @@ -213,12 +214,33 @@ write_png(int width, int height) argb_to_rgba(data, height, buffer_stride); - // TODO: call convert - FILE *f = fopen("wayland-screenshot", "w"); - fwrite(data, buffer_stride * height, 1, f); - fclose(f); - - free(data); + char size[10 + 1 + 10 + 2 + 1]; // int32_t are max 10 digits + sprintf(size, "%dx%d+0", width, height); + + int fd[2]; + pipe(fd); + + pid_t child = fork(); + if (child < 0) { + fprintf(stderr, "fork() failed\n"); + exit(EXIT_FAILURE); + } else if (child != 0) { + close(fd[0]); + write(fd[1], data, buffer_stride * height); + close(fd[1]); + free(data); + waitpid(child, NULL, 0); + } else { + close(fd[1]); + if (dup2(fd[0], 0) != 0) { + fprintf(stderr, "cannot dup the pipe\n"); + } + close(fd[0]); + execlp("convert", "convert", "-depth", "8", "-size", size, "rgba:-", + "-alpha", "opaque", filename, NULL); + fprintf(stderr, "cannot execute convert\n"); + exit(EXIT_FAILURE); + } } static int @@ -296,7 +318,6 @@ int main(int argc, char *argv[]) wl_display_roundtrip(display); } - write_png(width, height); - - return 0; + write_image("wayland-screenshot.png", width, height); + return EXIT_SUCCESS; } |