io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget Class Reference

Inheritance diagram for io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget:

Public Member Functions
	ImageReaderPlatformViewRenderTarget (ImageTextureEntry textureEntry)
void	resize (int width, int height)
int	getWidth ()
int	getHeight ()
long	getId ()
void	release ()
boolean	isReleased ()
Surface	getSurface ()
Public Member Functions inherited from io.flutter.plugin.platform.PlatformViewRenderTarget
default void	scheduleFrame ()

Protected Member Functions
ImageReader	createImageReader33 ()
ImageReader	createImageReader29 ()
ImageReader	createImageReader ()

Detailed Description

Definition at line 17 of file ImageReaderPlatformViewRenderTarget.java.

Constructor & Destructor Documentation

ImageReaderPlatformViewRenderTarget()

io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.ImageReaderPlatformViewRenderTarget ( ImageTextureEntry  textureEntry )

inline

Definition at line 95 of file ImageReaderPlatformViewRenderTarget.java.

                                                                             {
    if (Build.VERSION.SDK_INT < API_LEVELS.API_29) {
      throw new UnsupportedOperationException(
          "ImageReaderPlatformViewRenderTarget requires API version 29+");
    }
    this.textureEntry = textureEntry;
  }

Member Function Documentation

createImageReader()

ImageReader io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.createImageReader ( )

inlineprotected

Definition at line 85 of file ImageReaderPlatformViewRenderTarget.java.

                                            {
    if (Build.VERSION.SDK_INT >= API_LEVELS.API_33) {
      return createImageReader33();
    } else if (Build.VERSION.SDK_INT >= API_LEVELS.API_29) {
      return createImageReader29();
    }
    throw new UnsupportedOperationException(
        "ImageReaderPlatformViewRenderTarget requires API version 29+");
  }

createImageReader29()

ImageReader io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.createImageReader29 ( )

inlineprotected

Definition at line 73 of file ImageReaderPlatformViewRenderTarget.java.

                                              {
    final ImageReader reader =
        ImageReader.newInstance(
            bufferWidth,
            bufferHeight,
            ImageFormat.PRIVATE,
            MAX_IMAGES,
            HardwareBuffer.USAGE_GPU_SAMPLED_IMAGE);
    reader.setOnImageAvailableListener(this.onImageAvailableListener, onImageAvailableHandler);
    return reader;
  }

createImageReader33()

ImageReader io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.createImageReader33 ( )

inlineprotected

Definition at line 54 of file ImageReaderPlatformViewRenderTarget.java.

                                              {
    final ImageReader.Builder builder = new ImageReader.Builder(bufferWidth, bufferHeight);
    // Allow for double buffering.
    builder.setMaxImages(MAX_IMAGES);
    // Use PRIVATE image format so that we can support video decoding.
    // TODO(johnmccutchan): Should we always use PRIVATE here? It may impact our ability to read
    // back texture data. If we don't always want to use it, how do we decide when to use it or not?
    // Perhaps PlatformViews can indicate if they may contain DRM'd content. I need to investigate
    // how PRIVATE impacts our ability to take screenshots or capture the output of Flutter
    // application.
    builder.setImageFormat(ImageFormat.PRIVATE);
    // Hint that consumed images will only be read by GPU.
    builder.setUsage(HardwareBuffer.USAGE_GPU_SAMPLED_IMAGE);
    final ImageReader reader = builder.build();
    reader.setOnImageAvailableListener(this.onImageAvailableListener, onImageAvailableHandler);
    return reader;
  }

getHeight()

int io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.getHeight ( )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 118 of file ImageReaderPlatformViewRenderTarget.java.

                         {
    return this.bufferHeight;
  }

getId()

long io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.getId ( )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 122 of file ImageReaderPlatformViewRenderTarget.java.

                      {
    return this.textureEntry.id();
  }

getSurface()

Surface io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.getSurface ( )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 136 of file ImageReaderPlatformViewRenderTarget.java.

                              {
    return this.reader.getSurface();
  }

getWidth()

int io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.getWidth ( )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 114 of file ImageReaderPlatformViewRenderTarget.java.

                        {
    return this.bufferWidth;
  }

isReleased()

boolean io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.isReleased ( )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 132 of file ImageReaderPlatformViewRenderTarget.java.

                              {
    return this.textureEntry == null;
  }

release()

void io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.release ( )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 126 of file ImageReaderPlatformViewRenderTarget.java.

                        {
    closeReader();
    // textureEntry has a finalizer attached.
    textureEntry = null;
  }

resize()

void io.flutter.plugin.platform.ImageReaderPlatformViewRenderTarget.resize ( int  width, int  height  )

inline

Implements io.flutter.plugin.platform.PlatformViewRenderTarget.

Definition at line 103 of file ImageReaderPlatformViewRenderTarget.java.

                                            {
    if (this.reader != null && bufferWidth == width && bufferHeight == height) {
      // No size change.
      return;
    }
    closeReader();
    bufferWidth = width;
    bufferHeight = height;
    this.reader = createImageReader();
  }

---

The documentation for this class was generated from the following file:

• shell/platform/android/io/flutter/plugin/platform/ImageReaderPlatformViewRenderTarget.java