From 89870a35bde2f67f9c371ba145e90b86d3e2dd1b Mon Sep 17 00:00:00 2001 From: Alexander Volkov Date: Wed, 22 Feb 2017 02:18:27 +0300 Subject: xcb: Wrap xcb callings in macros ... to improve readability and reliability. This change introduces macros Q_XCB_REPLY and Q_XCB_REPLY_UNCHECKED that allow to replace couples of xcb cookie/reply callings by a single "calling" of a macro. The macros wrap the reply in std::unique_ptr thus preventing the need to free it manually. The following C++11 features are used: - variadic macros - std::unique_ptr - auto type deduction Change-Id: Icf9b93353404a39bf5f4a4562b9234db18cac696 Reviewed-by: Gatis Paeglis --- src/plugins/platforms/xcb/qxcbimage.cpp | 30 +++++++----------------------- 1 file changed, 7 insertions(+), 23 deletions(-) (limited to 'src/plugins/platforms/xcb/qxcbimage.cpp') diff --git a/src/plugins/platforms/xcb/qxcbimage.cpp b/src/plugins/platforms/xcb/qxcbimage.cpp index d4bdb6c771..67a959d8a4 100644 --- a/src/plugins/platforms/xcb/qxcbimage.cpp +++ b/src/plugins/platforms/xcb/qxcbimage.cpp @@ -91,19 +91,14 @@ QPixmap qt_xcb_pixmapFromXPixmap(QXcbConnection *connection, xcb_pixmap_t pixmap { xcb_connection_t *conn = connection->xcb_connection(); - xcb_get_image_cookie_t get_image_cookie = - xcb_get_image_unchecked(conn, XCB_IMAGE_FORMAT_Z_PIXMAP, pixmap, - 0, 0, width, height, 0xffffffff); - - xcb_get_image_reply_t *image_reply = - xcb_get_image_reply(conn, get_image_cookie, NULL); - + auto image_reply = Q_XCB_REPLY_UNCHECKED(xcb_get_image, conn, XCB_IMAGE_FORMAT_Z_PIXMAP, pixmap, + 0, 0, width, height, 0xffffffff); if (!image_reply) { return QPixmap(); } - uint8_t *data = xcb_get_image_data(image_reply); - uint32_t length = xcb_get_image_data_length(image_reply); + uint8_t *data = xcb_get_image_data(image_reply.get()); + uint32_t length = xcb_get_image_data_length(image_reply.get()); QPixmap result; @@ -165,7 +160,6 @@ QPixmap qt_xcb_pixmapFromXPixmap(QXcbConnection *connection, xcb_pixmap_t pixmap result = QPixmap::fromImage(image.copy()); } - free(image_reply); return result; } @@ -203,22 +197,15 @@ xcb_cursor_t qt_xcb_createCursorXRender(QXcbScreen *screen, const QImage &image, xcb_connection_t *conn = screen->xcb_connection(); const int w = image.width(); const int h = image.height(); - xcb_generic_error_t *error = 0; - xcb_render_query_pict_formats_cookie_t formatsCookie = xcb_render_query_pict_formats(conn); - xcb_render_query_pict_formats_reply_t *formatsReply = xcb_render_query_pict_formats_reply(conn, - formatsCookie, - &error); - if (!formatsReply || error) { + auto formats = Q_XCB_REPLY(xcb_render_query_pict_formats, conn); + if (!formats) { qWarning("qt_xcb_createCursorXRender: query_pict_formats failed"); - free(formatsReply); - free(error); return XCB_NONE; } - xcb_render_pictforminfo_t *fmt = xcb_render_util_find_standard_format(formatsReply, + xcb_render_pictforminfo_t *fmt = xcb_render_util_find_standard_format(formats.get(), XCB_PICT_STANDARD_ARGB_32); if (!fmt) { qWarning("qt_xcb_createCursorXRender: Failed to find format PICT_STANDARD_ARGB_32"); - free(formatsReply); return XCB_NONE; } @@ -230,14 +217,12 @@ xcb_cursor_t qt_xcb_createCursorXRender(QXcbScreen *screen, const QImage &image, 0, 0, 0); if (!xi) { qWarning("qt_xcb_createCursorXRender: xcb_image_create failed"); - free(formatsReply); return XCB_NONE; } xi->data = (uint8_t *) malloc(xi->stride * h); if (!xi->data) { qWarning("qt_xcb_createCursorXRender: Failed to malloc() image data"); xcb_image_destroy(xi); - free(formatsReply); return XCB_NONE; } memcpy(xi->data, img.constBits(), img.byteCount()); @@ -260,7 +245,6 @@ xcb_cursor_t qt_xcb_createCursorXRender(QXcbScreen *screen, const QImage &image, xcb_image_destroy(xi); xcb_render_free_picture(conn, pic); xcb_free_pixmap(conn, pix); - free(formatsReply); return cursor; #else -- cgit v1.2.3