Provides support for using native Qt Gui types in protobuf. 更多...
此模块在 技术预览 状态。
This module was introduced in Qt 6.6.
Qt::ProtobufQtGuiTypes is a library with pre-defined protobuf messages designed to encapsulate a selection of Qt Gui types.
List of supported Qt Gui types:
To enable Qt GUI types support, add ProtobufQtGuiTypes as a dependency to your CMake project:
... find_package(Qt REQUIRED COMPONENTS Protobuf ProtobufQtGuiTypes) ... # After target creation target_link_libraries(${TARGET} PRIVATE Qt::ProtobufQtGuiTypes)
Before any serialization or deserialization of messages that use Qt GUI types as fields, call the registration method:
// e.g. in main.cpp QtProtobuf::qRegisterProtobufQtGuiTypes(); ...
All supported messages are described in a special .proto file, QtGui .proto , that describes Qt types from the Qt GUI module.
You can also use the file to generate code for other languages or frameworks.
Import the required Qt GUI types module in your interface .proto file For example:
syntax = "proto3"; package project.module.component; import "QtGui/QtGui.proto"; message QMatrix4x4Message { QtGui.QMatrix4x4 matrix = 1; }
The Qt Protobuf generator detects Qt GUI types, supplied by the ProtobufQtGuiTypes package, and uses them directly. This gives you the flexibility to use these types without additional conversion.
The ProtobufQtGuiTypes library provides the possibility to work with the
QImage
class. Usually, the library converts all
QImage
objects in to
PNG
format. But if the
QImage
was created using
https://doc.qt.io/qt-6/qimage.html#Format-enum
a {floating point formats}, then conversion to
PNG
will lead to data loss. To prevent data loss, the library automatically converts the image file to
TIFF
format, if it is supported by the system, otherwise converts to
PNG
.
注意:
if you don't want to use
TIFF
, you need to convert the image explicitly into a non-floating point format.