QTextureImage Class
class Qt3DRender::QTextureImageEncapsulates 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
| 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) |
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:
| QUrl | source() const |
| void | setSource(const QUrl &source) |
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) |