surface-screenshot: a new manual test module
Add a new Weston plugin under tests/ for manual testing of the surface-shooting API. The debug key binding 'h' triggers a surface shot from the surface that currently has the pointer focus. The shot is written in PAM format into a file. PAM format was chosen because it is dead-simple to write from scratch and can carry an RGBA format. Changes in v2: - check fprintf calls, fix a malloc without free - remove stride and format arguments from the API Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> v1 Tested-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp> Reviewed-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Pekka Paalanen
parent
23a07005ed
commit
312fe5f445
17
Makefile.am
17
Makefile.am
@ -1104,6 +1104,23 @@ EXTRA_DIST += \
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protocol/ivi-application.xml \
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protocol/ivi-hmi-controller.xml
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#
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# manual test modules in tests subdirectory
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#
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noinst_LTLIBRARIES += \
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surface-screenshot.la
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surface_screenshot_la_LIBADD = $(COMPOSITOR_LIBS) libshared.la
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surface_screenshot_la_LDFLAGS = $(test_module_ldflags)
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surface_screenshot_la_CFLAGS = $(GCC_CFLAGS) $(COMPOSITOR_CFLAGS)
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surface_screenshot_la_SOURCES = tests/surface-screenshot.c
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#
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# Documentation
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#
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man_MANS = weston.1 weston.ini.5
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if ENABLE_DRM_COMPOSITOR
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218
tests/surface-screenshot.c
Normal file
218
tests/surface-screenshot.c
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@ -0,0 +1,218 @@
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/*
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* Copyright © 2015 Collabora, Ltd.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of the copyright holders not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The copyright holders make
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <assert.h>
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#include <ctype.h>
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#include <string.h>
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#include <errno.h>
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#include <linux/input.h>
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#include "compositor.h"
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#include "file-util.h"
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static char *
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encode_PAM_comment_line(const char *comment)
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{
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size_t len = strlen(comment);
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char *str = malloc(len + 2);
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char *dst = str;
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const char *src = comment;
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const char *end = src + len;
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*dst++ = '#';
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*dst++ = ' ';
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for (; src < end; src++, dst++) {
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if (*src == '\n' || !isprint(*src))
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*dst = '_';
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else
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*dst = *src;
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}
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return str;
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}
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/*
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* PAM image format:
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* http://en.wikipedia.org/wiki/Netpbm#PAM_graphics_format
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* RGBA is in byte address order.
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*
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* ImageMagick 'convert' can convert a PAM image to a more common format.
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* To view the image metadata: $ head -n7 image.pam
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*/
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static int
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write_PAM_image_rgba(FILE *fp, int width, int height,
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void *pixels, size_t size, const char *comment)
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{
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char *str;
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int ret;
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assert(size == (size_t)4 * width * height);
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ret = fprintf(fp, "P7\nWIDTH %d\nHEIGHT %d\nDEPTH 4\nMAXVAL 255\n"
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"TUPLTYPE RGB_ALPHA\n", width, height);
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if (ret < 0)
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return -1;
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if (comment) {
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str = encode_PAM_comment_line(comment);
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ret = fprintf(fp, "%s\n", str);
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free(str);
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if (ret < 0)
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return -1;
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}
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ret = fprintf(fp, "ENDHDR\n");
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if (ret < 0)
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return -1;
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if (fwrite(pixels, 1, size, fp) != size)
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return -1;
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if (ferror(fp))
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return -1;
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return 0;
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}
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static uint32_t
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unmult(uint32_t c, uint32_t a)
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{
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return (c * 255 + a / 2) / a;
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}
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static void
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unpremultiply_and_swap_a8b8g8r8_to_PAMrgba(void *pixels, size_t size)
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{
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uint32_t *p = pixels;
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uint32_t *end;
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for (end = p + size / 4; p < end; p++) {
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uint32_t v = *p;
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uint32_t a;
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a = (v & 0xff000000) >> 24;
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if (a == 0) {
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*p = 0;
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} else {
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uint8_t *dst = (uint8_t *)p;
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dst[0] = unmult((v & 0x000000ff) >> 0, a);
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dst[1] = unmult((v & 0x0000ff00) >> 8, a);
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dst[2] = unmult((v & 0x00ff0000) >> 16, a);
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dst[3] = a;
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}
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}
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}
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static void
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trigger_binding(struct weston_seat *seat, uint32_t time, uint32_t key,
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void *data)
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{
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const char *prefix = "surfaceshot-";
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const char *suffix = ".pam";
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char fname[1024];
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struct weston_surface *surface;
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int width, height;
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char desc[512];
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void *pixels;
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const size_t bytespp = 4; /* PIXMAN_a8b8g8r8 */
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size_t sz;
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int ret;
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FILE *fp;
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if (seat->pointer_device_count == 0 ||
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!seat->pointer ||
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!seat->pointer->focus)
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return;
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surface = seat->pointer->focus->surface;
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weston_surface_get_content_size(surface, &width, &height);
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if (!surface->get_label ||
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surface->get_label(surface, desc, sizeof(desc)) < 0)
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snprintf(desc, sizeof(desc), "(unknown)");
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weston_log("surface screenshot of %p: '%s', %dx%d\n",
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surface, desc, width, height);
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sz = width * bytespp * height;
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if (sz == 0) {
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weston_log("no content for %p\n", surface);
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return;
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}
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pixels = malloc(sz);
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if (!pixels) {
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weston_log("%s: failed to malloc %zu B\n", __func__, sz);
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return;
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}
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ret = weston_surface_copy_content(surface, pixels, sz,
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0, 0, width, height);
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if (ret < 0) {
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weston_log("shooting surface %p failed\n", surface);
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goto out;
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}
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unpremultiply_and_swap_a8b8g8r8_to_PAMrgba(pixels, sz);
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fp = file_create_dated(prefix, suffix, fname, sizeof(fname));
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if (!fp) {
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const char *msg;
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switch (errno) {
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case ETIME:
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msg = "failure in datetime formatting";
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break;
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default:
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msg = strerror(errno);
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}
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weston_log("Cannot open '%s*%s' for writing: %s\n",
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prefix, suffix, msg);
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goto out;
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}
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ret = write_PAM_image_rgba(fp, width, height, pixels, sz, desc);
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if (fclose(fp) != 0 || ret < 0)
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weston_log("writing surface %p screenshot failed.\n", surface);
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else
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weston_log("successfully shot surface %p into '%s'\n",
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surface, fname);
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out:
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free(pixels);
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}
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WL_EXPORT int
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module_init(struct weston_compositor *ec,
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int *argc, char *argv[])
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{
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weston_compositor_add_debug_binding(ec, KEY_H, trigger_binding, ec);
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return 0;
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}
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