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-rw-r--r--src/scrotty.c194
1 files changed, 16 insertions, 178 deletions
diff --git a/src/scrotty.c b/src/scrotty.c
index c076fa4..4bc6982 100644
--- a/src/scrotty.c
+++ b/src/scrotty.c
@@ -42,31 +42,6 @@
#define LIST_DISPLAY_VARS X(DISPLAY) X(MDS_DISPLAY) X(MIR_DISPLAY) X(WAYLAND_DISPLAY) X(PREFERRED_DISPLAY)
-#define LIST_0_9(P) P"0\n", P"1\n", P"2\n", P"3\n", P"4\n", P"5\n", P"6\n", P"7\n", P"8\n", P"9\n"
-/**
- * [0, 255]-integer-to-text convertion lookup table for faster conversion from
- * raw framebuffer data to the PNM format. The values have a whitespace at the
- * end for even faster conversion.
- * Lines should not be longer than 70 (although most programs will probably
- * work even if there are longer lines), therefore the selected whitespace
- * is LF (new line).
- *
- * ASCII has wider support than binary, and is create for version control,
- * especifially with one datum per line.
- */
-const char* inttable[] =
- {
- LIST_0_9(""), LIST_0_9("1"), LIST_0_9("2"), LIST_0_9("3"), LIST_0_9("4"),
- LIST_0_9("5"), LIST_0_9("6"), LIST_0_9("7"), LIST_0_9("8"), LIST_0_9("9"),
-
- LIST_0_9("10"), LIST_0_9("11"), LIST_0_9("12"), LIST_0_9("13"), LIST_0_9("14"),
- LIST_0_9("15"), LIST_0_9("16"), LIST_0_9("17"), LIST_0_9("18"), LIST_0_9("19"),
-
- LIST_0_9("20"), LIST_0_9("21"), LIST_0_9("22"), LIST_0_9("23"), LIST_0_9("24"),
- "250\n", "251\n", "252\n", "253\n", "254\n", "255\n"
- };
-
-
/**
* `argv[0]` from `main`.
@@ -89,85 +64,6 @@ static int try_alt_fbpath = 0;
/**
- * Create an PNM-file that is sent to a conversion process,
- * or directly to a file.
- *
- * @param fbname The framebuffer device.
- * @param width The width of the image.
- * @param height The height of the image.
- * @param fd The file descriptor connected to conversion process's stdin.
- * @return Zero on success, -1 on error.
- */
-static int
-save_pnm (const char *fbpath, long width, long height, int fd)
-{
- char buf[8 << 10];
- FILE *file = NULL;
- int fbfd = 1;
- ssize_t got, off;
- int saved_errno;
- size_t adjustment;
-
- /* Open the framebuffer device for reading. */
- fbfd = open (fbpath, O_RDONLY);
- if (fbfd == -1)
- goto fail;
-
- /* Create a FILE *, for writing, for the image file. */
- file = fdopen (fd, "w");
- if (file == NULL)
- goto fail;
-
- /* The PNM image should begin with `P3\n%{width} %{height}\n%{colour max=255}\n`.
- ('\n' and ' ' can be exchanged at will.) */
- if (fprintf (file, "P3\n%li %li\n255\n", width, height) < 0)
- goto fail;
-
- /* Convert raw framebuffer data into an PNM image. */
- for (off = 0;;)
- {
- /* Read data from the framebuffer, we may have up to 3 bytes buffered. */
- got = read (fbfd, buf + off, sizeof (buf) - (size_t)off * sizeof (char));
- if (got < 0)
- goto fail;
- if (got == 0)
- break;
- got += off;
-
- /* Convert read pixels. */
- if (convert_fb (file, buf, (size_t)got, &adjustment) < 0)
- goto fail;
-
- /* If we read a whole number of pixels, reset the buffer, otherwise,
- move the unconverted bytes to the beginning of the buffer. */
- if (adjustment)
- {
- off -= (ssize_t)adjustment;
- memcpy (buf, buf + off, (size_t)(got - off) * sizeof (char));
- off = got - off;
- }
- else
- off = 0;
- }
-
- /* Close files and return successfully. */
- fflush (file);
- fclose (file);
- close (fbfd);
- return 0;
-
- fail:
- saved_errno = errno;
- if (file != NULL)
- fclose (file);
- if (fbfd >= 0)
- close (fbfd);
- errno = saved_errno;
- return -1;
-}
-
-
-/**
* Create an image of a framebuffer.
*
* @param fbname The framebuffer device.
@@ -180,92 +76,34 @@ save_pnm (const char *fbpath, long width, long height, int fd)
static int
save (const char *fbpath, const char *imgpath, long width, long height, int raw)
{
- int pipe_rw[2] = { -1, -1 };
- pid_t pid;
- int status;
- int fd = -1;
+ int imgfd = -1, fbfd;
int saved_errno;
- if (raw)
- goto no_convert;
-
-
- /* Create a pipe that for sending data into the conversion process program. */
- if (pipe (pipe_rw) < 0)
- goto fail;
-
- /* Fork the process, the child will become the conversion process. */
- pid = fork ();
- if (pid == -1)
- goto fail;
-
-
- /* Child process: */
- if (pid == 0)
- {
- /* Close the write-end of the pipe. */
- close (pipe_rw[1]);
-
- /* Open file descriptor for the output image. */
- fd = open (imgpath, O_WRONLY | O_CREAT | O_TRUNC,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
- if (fd == -1)
- goto child_fail;
-
- /* Convert the PNM-image we create to a compressed image, namely in PNG. */
- if (convert (pipe_rw[0], fd) < 0)
- goto child_fail;
-
- _exit(0);
- child_fail:
- perror(execname);
- _exit(1);
- }
-
-
- /* Parent process: */
-
- /* Close the read-end of the pipe. */
- close (pipe_rw[0]), pipe_rw[0] = -1;
-
- /* Create a PNM-image of the framebuffer. */
- if (save_pnm (fbpath, width, height, pipe_rw[1]) < 0)
- goto fail;
-
- /* Close the write-end of the pipe. */
- close (pipe_rw[1]), pipe_rw[1] = -1;
-
- /* Wait for conversion process to exit. */
- if (waitpid (pid, &status, 0) < 0)
- goto fail;
-
- /* Return successfully if and only if conversion did. */
- return status == 0 ? 0 : -1;
-
-
- /* Conversion shall not take place: */
-
- no_convert:
/* Open output file. */
- if (fd = open (imgpath, O_WRONLY | O_CREAT | O_TRUNC,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), fd == -1)
+ imgfd = open (imgpath, O_WRONLY | O_CREAT | O_TRUNC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+ if (imgfd == -1)
FILE_FAILURE (imgpath);
+ /* Open the framebuffer device for reading. */
+ fbfd = open (fbpath, O_RDONLY);
+ if (fbfd == -1)
+ FILE_FAILURE (fbpath);
+
/* Save image. */
- if (save_pnm (fbpath, width, height, fd) < 0)
+ if ((raw ? save_pnm : save_png) (fbfd, width, height, imgfd) < 0)
goto fail;
- close (fd);
+ close (fbfd);
+ close (imgfd);
return 0;
fail:
saved_errno = errno;
- if (pipe_rw[0] >= 0)
- close (pipe_rw[0]);
- if (pipe_rw[1] >= 0)
- close (pipe_rw[1]);
- if (fd >= 0)
- close (fd);
+ if (fbfd >= 0)
+ close (fbfd);
+ if (imgfd >= 0)
+ close (imgfd);
errno = saved_errno;
return -1;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-08 18:22:28 +0000