DicomShaderPainter class

A performance-critical CustomPainter that offloads medical rendering to the GPU.

DicomShaderPainter acts as the bridge between Flutter's Canvas and the custom GLSL Fragment Shader. It handles:

By performing these calculations on the GPU, we ensure clinical precision and smooth 60fps interactivity even on mobile devices.

Inheritance

Constructors

DicomShaderPainter({required DicomFrameResult frameResult, required double windowCenter, required double windowWidth, required FragmentShader shader, required Image rawTexture}): Creates a DicomShaderPainter.

frameResult → DicomFrameResult: The processing result containing metadata and pixel data pointers.
final
hashCode → int: The hash code for this object.
no setterinherited
rawTexture → Image: The raw 16-bit pixel data packed into an RGBA ui.Image sampler.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
semanticsBuilder → SemanticsBuilderCallback?: Returns a function that builds semantic information for the picture drawn by this painter.
no setterinherited
shader → FragmentShader: The compiled GLSL shader program instance.
final
windowCenter → double: The user-defined or default Window Center for contrast mapping.
final
windowWidth → double: The user-defined or default Window Width for contrast mapping.
final

addListener(VoidCallback listener) → void: Register a closure to be notified when it is time to repaint.
inherited
hitTest(Offset position) → bool?: Called whenever a hit test is being performed on an object that is using this custom paint delegate.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
paint(Canvas canvas, Size size) → void: Performs the actual drawing operation using the fragment shader.
override
removeListener(VoidCallback listener) → void: Remove a previously registered closure from the list of closures that the object notifies when it is time to repaint.
inherited
shouldRebuildSemantics(covariant CustomPainter oldDelegate) → bool: Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former).
inherited
shouldRepaint(covariant DicomShaderPainter oldDelegate) → bool: Determines if the painter needs to rebuild.
override
toString() → String: A string representation of this object.
inherited