From patchwork Wed Apr 27 17:29:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 12829269 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 110ACC4332F for ; Wed, 27 Apr 2022 17:32:23 +0000 (UTC) Received: from localhost ([::1]:60526 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1njlWY-0007Jp-3d for qemu-devel@archiver.kernel.org; Wed, 27 Apr 2022 13:32:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42136) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1njlUL-0004SR-TD for qemu-devel@nongnu.org; Wed, 27 Apr 2022 13:30:05 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:59458) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1njlUJ-0002Ml-ED for qemu-devel@nongnu.org; Wed, 27 Apr 2022 13:30:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1651080602; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+I1ngTZVLqcdmFgdt6x0Rr5TgDsIKRVdOnKz0z1zUdU=; b=bLMGRwjSJX0ZtysZ+1XkgpA66BsIqeLG6ko1kLrAahmEfD0Hmbc2BNdW5+ez20rQP6Qja8 uCFA6AAAsQCsuEx/cEpFvespaAmjlzvZaoLMJVxmSpo4pdDJQxc6k0jL3QJoqMPvQ+xNiQ MjTtQjgsbjZWsHKZl9g7PyYfR+8Wabc= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-538-i0CTKvstPSi-mFd-3E2NQQ-1; Wed, 27 Apr 2022 13:29:59 -0400 X-MC-Unique: i0CTKvstPSi-mFd-3E2NQQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 4D3AB29AA2E3; Wed, 27 Apr 2022 17:29:59 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.39.192.9]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C4268C28131; Wed, 27 Apr 2022 17:29:58 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 53C231800D52; Wed, 27 Apr 2022 19:29:52 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 3/9] Added parameter to take screenshot with screendump as PNG Date: Wed, 27 Apr 2022 19:29:46 +0200 Message-Id: <20220427172952.2986839-4-kraxel@redhat.com> In-Reply-To: <20220427172952.2986839-1-kraxel@redhat.com> References: <20220427172952.2986839-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 Received-SPF: pass client-ip=170.10.133.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Markus Armbruster , "Dr . David Alan Gilbert" , Kshitij Suri , Gerd Hoffmann , Eric Blake Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Kshitij Suri Currently screendump only supports PPM format, which is un-compressed. Added a "format" parameter to QMP and HMP screendump command to support PNG image capture using libpng. QMP example usage: { "execute": "screendump", "arguments": { "filename": "/tmp/image", "format":"png" } } HMP example usage: screendump /tmp/image -f png Resolves: https://gitlab.com/qemu-project/qemu/-/issues/718 Signed-off-by: Kshitij Suri Reviewed-by: Daniel P. Berrangé Acked-by: Markus Armbruster Acked-by: Dr. David Alan Gilbert Message-Id: <20220408071336.99839-3-kshitij.suri@nutanix.com> Signed-off-by: Gerd Hoffmann --- monitor/hmp-cmds.c | 12 +++++- ui/console.c | 101 +++++++++++++++++++++++++++++++++++++++++++-- hmp-commands.hx | 11 ++--- qapi/ui.json | 24 +++++++++-- 4 files changed, 136 insertions(+), 12 deletions(-) diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 634968498b58..2442bfa98984 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -1720,9 +1720,19 @@ hmp_screendump(Monitor *mon, const QDict *qdict) const char *filename = qdict_get_str(qdict, "filename"); const char *id = qdict_get_try_str(qdict, "device"); int64_t head = qdict_get_try_int(qdict, "head", 0); + const char *input_format = qdict_get_try_str(qdict, "format"); Error *err = NULL; + ImageFormat format; - qmp_screendump(filename, id != NULL, id, id != NULL, head, &err); + format = qapi_enum_parse(&ImageFormat_lookup, input_format, + IMAGE_FORMAT_PPM, &err); + if (err) { + goto end; + } + + qmp_screendump(filename, id != NULL, id, id != NULL, head, + input_format != NULL, format, &err); +end: hmp_handle_error(mon, err); } diff --git a/ui/console.c b/ui/console.c index 1752f2ec8897..15d0f6affd4c 100644 --- a/ui/console.c +++ b/ui/console.c @@ -37,6 +37,9 @@ #include "exec/memory.h" #include "io/channel-file.h" #include "qom/object.h" +#ifdef CONFIG_PNG +#include +#endif #define DEFAULT_BACKSCROLL 512 #define CONSOLE_CURSOR_PERIOD 500 @@ -291,6 +294,89 @@ void graphic_hw_invalidate(QemuConsole *con) } } +#ifdef CONFIG_PNG +/** + * png_save: Take a screenshot as PNG + * + * Saves screendump as a PNG file + * + * Returns true for success or false for error. + * + * @fd: File descriptor for PNG file. + * @image: Image data in pixman format. + * @errp: Pointer to an error. + */ +static bool png_save(int fd, pixman_image_t *image, Error **errp) +{ + int width = pixman_image_get_width(image); + int height = pixman_image_get_height(image); + g_autofree png_struct *png_ptr = NULL; + g_autofree png_info *info_ptr = NULL; + g_autoptr(pixman_image_t) linebuf = + qemu_pixman_linebuf_create(PIXMAN_a8r8g8b8, width); + uint8_t *buf = (uint8_t *)pixman_image_get_data(linebuf); + FILE *f = fdopen(fd, "wb"); + int y; + if (!f) { + error_setg_errno(errp, errno, + "Failed to create file from file descriptor"); + return false; + } + + png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, + NULL, NULL); + if (!png_ptr) { + error_setg(errp, "PNG creation failed. Unable to write struct"); + fclose(f); + return false; + } + + info_ptr = png_create_info_struct(png_ptr); + + if (!info_ptr) { + error_setg(errp, "PNG creation failed. Unable to write info"); + fclose(f); + png_destroy_write_struct(&png_ptr, &info_ptr); + return false; + } + + png_init_io(png_ptr, f); + + png_set_IHDR(png_ptr, info_ptr, width, height, 8, + PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + png_write_info(png_ptr, info_ptr); + + for (y = 0; y < height; ++y) { + qemu_pixman_linebuf_fill(linebuf, image, width, 0, y); + png_write_row(png_ptr, buf); + } + qemu_pixman_image_unref(linebuf); + + png_write_end(png_ptr, NULL); + + png_destroy_write_struct(&png_ptr, &info_ptr); + + if (fclose(f) != 0) { + error_setg_errno(errp, errno, + "PNG creation failed. Unable to close file"); + return false; + } + + return true; +} + +#else /* no png support */ + +static bool png_save(int fd, pixman_image_t *image, Error **errp) +{ + error_setg(errp, "Enable PNG support with libpng for screendump"); + return false; +} + +#endif /* CONFIG_PNG */ + static bool ppm_save(int fd, pixman_image_t *image, Error **errp) { int width = pixman_image_get_width(image); @@ -329,7 +415,8 @@ static void graphic_hw_update_bh(void *con) /* Safety: coroutine-only, concurrent-coroutine safe, main thread only */ void coroutine_fn qmp_screendump(const char *filename, bool has_device, const char *device, - bool has_head, int64_t head, Error **errp) + bool has_head, int64_t head, + bool has_format, ImageFormat format, Error **errp) { g_autoptr(pixman_image_t) image = NULL; QemuConsole *con; @@ -385,8 +472,16 @@ qmp_screendump(const char *filename, bool has_device, const char *device, * yields and releases the BQL. It could produce corrupted dump, but * it should be otherwise safe. */ - if (!ppm_save(fd, image, errp)) { - qemu_unlink(filename); + if (has_format && format == IMAGE_FORMAT_PNG) { + /* PNG format specified for screendump */ + if (!png_save(fd, image, errp)) { + qemu_unlink(filename); + } + } else { + /* PPM format specified/default for screendump */ + if (!ppm_save(fd, image, errp)) { + qemu_unlink(filename); + } } } diff --git a/hmp-commands.hx b/hmp-commands.hx index 8476277aa9c9..808020d0051b 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -244,11 +244,12 @@ ERST { .name = "screendump", - .args_type = "filename:F,device:s?,head:i?", - .params = "filename [device [head]]", - .help = "save screen from head 'head' of display device 'device' " - "into PPM image 'filename'", - .cmd = hmp_screendump, + .args_type = "filename:F,format:-fs,device:s?,head:i?", + .params = "filename [-f format] [device [head]]", + .help = "save screen from head 'head' of display device 'device'" + "in specified format 'format' as image 'filename'." + "Currently only 'png' and 'ppm' formats are supported.", + .cmd = hmp_screendump, .coroutine = true, }, diff --git a/qapi/ui.json b/qapi/ui.json index 13a8bb82aa05..596f37fc37aa 100644 --- a/qapi/ui.json +++ b/qapi/ui.json @@ -157,12 +157,27 @@ ## { 'command': 'expire_password', 'boxed': true, 'data': 'ExpirePasswordOptions' } +## +# @ImageFormat: +# +# Supported image format types. +# +# @png: PNG format +# +# @ppm: PPM format +# +# Since: 7.1 +# +## +{ 'enum': 'ImageFormat', + 'data': ['ppm', 'png'] } + ## # @screendump: # -# Write a PPM of the VGA screen to a file. +# Capture the contents of a screen and write it to a file. # -# @filename: the path of a new PPM file to store the image +# @filename: the path of a new file to store the image # # @device: ID of the display device that should be dumped. If this parameter # is missing, the primary display will be used. (Since 2.12) @@ -171,6 +186,8 @@ # parameter is missing, head #0 will be used. Also note that the head # can only be specified in conjunction with the device ID. (Since 2.12) # +# @format: image format for screendump. (default: ppm) (Since 7.1) +# # Returns: Nothing on success # # Since: 0.14 @@ -183,7 +200,8 @@ # ## { 'command': 'screendump', - 'data': {'filename': 'str', '*device': 'str', '*head': 'int'}, + 'data': {'filename': 'str', '*device': 'str', '*head': 'int', + '*format': 'ImageFormat'}, 'coroutine': true } ##