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Diffstat (limited to 'src/effects/ZoomBlur.qml')
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diff --git a/src/effects/ZoomBlur.qml b/src/effects/ZoomBlur.qml deleted file mode 100644 index 66ba710..0000000 --- a/src/effects/ZoomBlur.qml +++ /dev/null @@ -1,306 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2017 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the Qt Graphical Effects module. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -import QtQuick 2.12 -import QtGraphicalEffects.private 1.12 - -/*! - \qmltype ZoomBlur - \inqmlmodule QtGraphicalEffects - \since QtGraphicalEffects 1.0 - \inherits QtQuick2::Item - \ingroup qtgraphicaleffects-motion-blur - \brief Applies directional blur effect towards source items center point. - - Effect creates perceived impression that the source item appears to be - moving towards the center point in Z-direction or that the camera appears - to be zooming rapidly. Other available motion blur effects are - \l{QtGraphicalEffects::DirectionalBlur}{DirectionalBlur} - and \l{QtGraphicalEffects::RadialBlur}{RadialBlur}. - - \table - \header - \li Source - \li Effect applied - \row - \li \image Original_bug.png - \li \image ZoomBlur_bug.png - \endtable - - \note This effect is available when running with OpenGL. - - \section1 Example - - The following example shows how to apply the effect. - \snippet ZoomBlur-example.qml example - -*/ -Item { - id: rootItem - - /*! - This property defines the source item that is going to be blurred. - - \note It is not supported to let the effect include itself, for - instance by setting source to the effect's parent. - */ - property variant source - - /*! - This property defines the maximum perceived amount of movement for each - pixel. The amount is smaller near the center and reaches the specified - value at the edges. - - The quality of the blur depends on \l{ZoomBlur::samples}{samples} - property. If length value is large, more samples are needed to keep the - visual quality at high level. - - The value ranges from 0.0 to inf. By default the property is set to \c - 0.0 (no blur). - - \table - \header - \li Output examples with different length values - \li - \li - \row - \li \image ZoomBlur_length1.png - \li \image ZoomBlur_length2.png - \li \image ZoomBlur_length3.png - \row - \li \b { length: 0.0 } - \li \b { length: 32.0 } - \li \b { length: 48.0 } - \row - \li \l samples: 24 - \li \l samples: 24 - \li \l samples: 24 - \row - \li \l horizontalOffset: 0 - \li \l horizontalOffset: 0 - \li \l horizontalOffset: 0 - \row - \li \l verticalOffset: 0 - \li \l verticalOffset: 0 - \li \l verticalOffset: 0 - \endtable - - */ - property real length: 0.0 - - /*! - This property defines how many samples are taken per pixel when blur - calculation is done. Larger value produces better quality, but is slower - to render. - - This property is not intended to be animated. Changing this property may - cause the underlying OpenGL shaders to be recompiled. - - Allowed values are between 0 and inf (practical maximum depends on GPU). - By default the property is set to \c 0 (no samples). - - */ - property int samples: 0 - - /*! - \qmlproperty real QtGraphicalEffects::ZoomBlur::horizontalOffset - \qmlproperty real QtGraphicalEffects::ZoomBlur::verticalOffset - - These properties define an offset in pixels for the blur direction - center point. - - The values range from -inf to inf. By default these properties are set - to \c 0. - - \table - \header - \li Output examples with different horizontalOffset values - \li - \li - \row - \li \image ZoomBlur_horizontalOffset1.png - \li \image ZoomBlur_horizontalOffset2.png - \li \image ZoomBlur_horizontalOffset3.png - \row - \li \b { horizontalOffset: 100.0 } - \li \b { horizontalOffset: 0.0 } - \li \b { horizontalOffset: -100.0 } - \row - \li \l samples: 24 - \li \l samples: 24 - \li \l samples: 24 - \row - \li \l length: 32 - \li \l length: 32 - \li \l length: 32 - \row - \li \l verticalOffset: 0 - \li \l verticalOffset: 0 - \li \l verticalOffset: 0 - \endtable - */ - property real horizontalOffset: 0.0 - property real verticalOffset: 0.0 - - /*! - This property defines the blur behavior near the edges of the item, - where the pixel blurring is affected by the pixels outside the source - edges. - - If the property is set to \c true, the pixels outside the source are - interpreted to be transparent, which is similar to OpenGL - clamp-to-border extension. The blur is expanded slightly outside the - effect item area. - - If the property is set to \c false, the pixels outside the source are - interpreted to contain the same color as the pixels at the edge of the - item, which is similar to OpenGL clamp-to-edge behavior. The blur does - not expand outside the effect item area. - - By default, the property is set to \c false. - - */ - property bool transparentBorder: false - - /*! - This property allows the effect output pixels to be cached in order to - improve the rendering performance. - - Every time the source or effect properties are changed, the pixels in - the cache must be updated. Memory consumption is increased, because an - extra buffer of memory is required for storing the effect output. - - It is recommended to disable the cache when the source or the effect - properties are animated. - - By default, the property is set to \c false. - */ - property bool cached: false - - SourceProxy { - id: sourceProxy - input: rootItem.source - sourceRect: rootItem.transparentBorder ? Qt.rect(-1, -1, parent.width + 2.0, parent.height + 2.0) : Qt.rect(0, 0, 0, 0) - } - - ShaderEffectSource { - id: cacheItem - anchors.fill: shaderItem - visible: rootItem.cached - smooth: true - sourceItem: shaderItem - live: true - hideSource: visible - } - - ShaderEffect { - id: shaderItem - property variant source: sourceProxy.output - property variant center: Qt.point(0.5 + rootItem.horizontalOffset / width, 0.5 + rootItem.verticalOffset / height) - property real len: rootItem.length - property bool transparentBorder: rootItem.transparentBorder - property real samples: rootItem.samples - property real weight: 1.0 / Math.max(1.0, rootItem.samples) - property variant expandPixels: transparentBorder ? Qt.size(rootItem.samples, rootItem.samples) : Qt.size(0,0) - property variant expand: transparentBorder ? Qt.size(expandPixels.width / width, expandPixels.height / height) : Qt.size(0,0) - property variant delta: Qt.size(1.0 / rootItem.width, 1.0 / rootItem.height) - - x: transparentBorder ? -expandPixels.width - 1 : 0 - y: transparentBorder ? -expandPixels.height - 1 : 0 - width: transparentBorder ? parent.width + 2.0 * expandPixels.width + 2 : parent.width - height: transparentBorder ? parent.height + 2.0 * expandPixels.height + 2 : parent.height - - property string fragmentShaderSkeleton: " - varying highp vec2 qt_TexCoord0; - uniform highp float qt_Opacity; - uniform lowp sampler2D source; - uniform highp float len; - uniform highp float weight; - uniform highp float samples; - uniform highp vec2 center; - uniform highp vec2 expand; - uniform highp vec2 delta; - - void main(void) { - mediump vec2 texCoord = qt_TexCoord0; - mediump vec2 centerCoord = center; - - PLACEHOLDER_EXPAND_STEPS - - highp vec2 dir = vec2(centerCoord.x - texCoord.s, centerCoord.y - texCoord.t); - dir /= max(1.0, length(dir) * 2.0); - highp vec2 shift = delta * len * dir * 2.0 / max(1.0, samples - 1.0); - gl_FragColor = vec4(0.0); - - PLACEHOLDER_UNROLLED_LOOP - - gl_FragColor *= weight * qt_Opacity; - } - " - - function buildFragmentShader() { - var shader = "" - if (GraphicsInfo.profile == GraphicsInfo.OpenGLCoreProfile) - shader += "#version 150 core\n#define varying in\n#define gl_FragColor fragColor\n#define texture2D texture\nout vec4 fragColor;\n" - shader += fragmentShaderSkeleton - var expandSteps = "" - - if (transparentBorder) { - expandSteps += "centerCoord = (centerCoord - expand) / (1.0 - 2.0 * expand);" - expandSteps += "texCoord = (texCoord - expand) / (1.0 - 2.0 * expand);" - } - - var unrolledLoop = "gl_FragColor += texture2D(source, texCoord);\n" - - if (rootItem.samples > 1) { - unrolledLoop = "" - for (var i = 0; i < rootItem.samples; i++) - unrolledLoop += "gl_FragColor += texture2D(source, texCoord); texCoord += shift;\n" - } - - shader = shader.replace("PLACEHOLDER_EXPAND_STEPS", expandSteps) - fragmentShader = shader.replace("PLACEHOLDER_UNROLLED_LOOP", unrolledLoop) - } - - onFragmentShaderChanged: sourceChanged() - onSamplesChanged: buildFragmentShader() - onTransparentBorderChanged: buildFragmentShader() - Component.onCompleted: buildFragmentShader() - } -} |