QTextureImage Class
(Qt3DRender::QTextureImage)Encapsulates the necessary information to create an OpenGL texture image from an image source. More...
| Header: | #include <QTextureImage> |
| qmake: | QT += 3drender |
| Since: | Qt 5.5 |
| Instantiated By: | TextureImage |
| Inherits: | Qt3DRender::QAbstractTextureImage |
This class was introduced in Qt 5.5.
Public Types
| enum | Status { None, Loading, Ready, Error } |
Properties
Public Functions
| QTextureImage(Qt3DCore::QNode *parent = nullptr) | |
| bool | isMirrored() const |
| QUrl | source() const |
| Qt3DRender::QTextureImage::Status | status() const |
Public Slots
| void | setMirrored(bool mirrored) |
| void | setSource(const QUrl &source) |
Signals
| void | mirroredChanged(bool mirrored) |
| void | sourceChanged(const QUrl &source) |
| void | statusChanged(Qt3DRender::QTextureImage::Status status) |
Protected Functions
| void | setStatus(Qt3DRender::QTextureImage::Status status) |
Reimplemented Protected Functions
| virtual void | sceneChangeEvent(const Qt3DCore::QSceneChangePtr &change) override |
Detailed Description
It contains the necessary information mipmap level, layer, cube face and source URL to load at the proper place data into an OpenGL texture.
Member Type Documentation
enum QTextureImage::Status
This enumeration specifies the status values for texture image loading.
| Constant | Value | Description |
|---|---|---|
Qt3DRender::QTextureImage::None | 0 | The texture image loading has not been started yet. |
Qt3DRender::QTextureImage::Loading | 1 | The texture image loading has started, but not finised. |
Qt3DRender::QTextureImage::Ready | 2 | The texture image loading has finished. |
Qt3DRender::QTextureImage::Error | 3 | The texture image loading confronted an error. |
Property Documentation
mirrored : bool
This property specifies whether the image should be mirrored when loaded. This is a convenience to avoid having to manipulate images to match the origin of the texture coordinates used by the rendering API. By default this property is set to true. This has no effect when using GPU compressed texture formats.
Warning: This property results in a performance price payed at runtime when loading uncompressed or CPU compressed image formats such as PNG. To avoid this performance price it is better to set this property to false and load texture assets that have been pre-mirrored.
Note: OpenGL specifies the origin of texture coordinates from the lower left hand corner whereas DirectX uses the the upper left hand corner.
Note: When using cube map texture you'll probably want mirroring disabled as the cube map sampler takes a direction rather than regular texture coordinates.
Access functions:
| bool | isMirrored() const |
| void | setMirrored(bool mirrored) |
Notifier signal:
| void | mirroredChanged(bool mirrored) |
source : QUrl
This property holds the source url from which data for the texture image will be loaded.
Access functions:
Notifier signal:
| void | sourceChanged(const QUrl &source) |
status : const Status
This property holds the status of the texture image loading.
- TextureImage.None
- TextureImage.Loading
- TextureImage.Ready
- TextureImage.Error
Access functions:
| Qt3DRender::QTextureImage::Status | status() const |
Notifier signal:
| void | statusChanged(Qt3DRender::QTextureImage::Status status) |
Member Function Documentation
QTextureImage::QTextureImage(Qt3DCore::QNode *parent = nullptr)
Constructs a new Qt3DRender::QTextureImage instance with parent as parent.
[slot] void QTextureImage::setMirrored(bool mirrored)
Sets mirroring to mirrored.
Note: This internally triggers a call to update the data generator.
Note: Setter function for property mirrored.
See also isMirrored().
[slot] void QTextureImage::setSource(const QUrl &source)
Sets the source url of the texture image to source.
Note: This internally triggers a call to update the data generator.
Note: Setter function for property source.
See also source().
bool QTextureImage::isMirrored() const
Returns whether mirroring is enabled or not.
Note: Getter function for property mirrored.
[override virtual protected] void QTextureImage::sceneChangeEvent(const Qt3DCore::QSceneChangePtr &change)
Reimplements: QNode::sceneChangeEvent(const Qt3DCore::QSceneChangePtr &change).
Sets the scene change event to change. change
[protected] void QTextureImage::setStatus(Qt3DRender::QTextureImage::Status status)
Sets the status to status. status
See also status().
QUrl QTextureImage::source() const
Returns the source url from which data for the texture image will be loaded.
Note: Getter function for property source.
See also setSource().
Qt3DRender::QTextureImage::Status QTextureImage::status() const
Returns the current status.
Note: Getter function for property status.
See also setStatus().
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