// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
/*!
    \title Qt Quick Examples - Shader Effects
    \example shadereffects
    \image qml-shadereffects-example.png {Qt text with various shader
           effects including genie, outline, shadow, and wobble}
    \brief A Qt Quick example demonstrating the use of shader effects.
    \ingroup qtquickexamples
    \examplecategory {Graphics}

    This example demonstrates a couple of visual effects that you can perform
    with shaders in Qt Quick. It applies five different effects on a text and
    a couple of images. For more information, visit
    \l{Important Concepts In Qt Quick - Graphical Effects}

    \include examples-run.qdocinc

    \section1 Using ShaderEffect

    The \l ShaderEffect type typically operates on other types, using a
    \l ShaderEffectSource:
    \snippet shadereffects/shadereffects.qml source

    In the above snippet, \c theItem is the ID of a complex QML object in the
    file.

    ShaderEffects can use this ShaderEffectSource as a texture in their fragment
    shader:
    \snippet shadereffects/shadereffects.qml fragment

    In order to support multiple graphics APIs, not just OpenGL, the
    shader source is not embedded into QML.  The referenced \c{.qsb}
    file is a pre-generated shader pack containing multiple variants
    of the shader code. The appropriate shader is then chosen by Qt
    Quick at run time, depending on the graphics API (Vulkan, Metal,
    Direct3D 11, or OpenGL) used at run time. The .qsb file is
    generated offline and is bundled with the executable via the Qt
    Resource System.

    You can use any custom property on the ShaderEffect in your shader. This
    makes animated shader code very easy:
    \snippet shadereffects/shadereffects.qml properties

    ShaderEffects can also have a custom vertext shader. Setting the mesh
    property on ShaderEffect provides more vertices for you to manipulate,
    enabling more effects.
    \snippet shadereffects/shadereffects.qml vertex
*/
