Hi Andrey, thanks for your reply.
Still, can you try both tests on your Jolla?
The first shouldn't work, while the second does.
On Tue, Feb 10, 2015 at 10:32 AM, Andrey Kozhevnikov <coderusin...@gmail.com
> wrote:
> sorry, not using emulator at all.
>
> 10.02.2015 14:28, Luca Donaggio пишет:
>
> Anybody is willing to try my test code and confirm or deny my finding?
>
> On Fri, Feb 6, 2015 at 2:12 PM, Luca Donaggio <donag...@gmail.com> wrote:
>
>> The following code works fine in Emulator, changing the gradient of the
>> Rectangle correctly updates the nested ShaderEffectSource and it is
>> reflected on the ShaderEffect which uses it as its texture:
>>
>> Page {
>> id: page
>>
>> SilicaFlickable {
>> anchors.fill: parent
>>
>> contentHeight: column.height
>>
>> Column {
>> id: column
>>
>> anchors { top: parent.top; left: parent.left; right:
>> parent.right; leftMargin: Theme.paddingLarge; rightMargin:
>> Theme.paddingLarge; }
>> spacing: Theme.paddingLarge
>>
>> PageHeader {
>> title: qsTr("ShaderEffect Test")
>> }
>>
>> Row {
>> anchors.horizontalCenter: parent.horizontalCenter
>> spacing: Theme.paddingLarge
>>
>> Column {
>> spacing: Theme.paddingSmall
>>
>> Rectangle {
>> id: gradientSource
>>
>> property list<Gradient> gradients: [
>> Gradient {
>> GradientStop { position: 0.0; color:
>> "black"; }
>> GradientStop { position: 1.0; color:
>> "blue"; }
>> },
>>
>> Gradient {
>> GradientStop { position: 0.0; color:
>> "black"; }
>> GradientStop { position: 1.0; color:
>> "red"; }
>> }
>> ]
>>
>> width: 100
>> height: 100
>>
>> gradient: gradients[0]
>>
>> ShaderEffectSource {
>> id: gradientTexture
>>
>> anchors.fill: parent
>> sourceItem: gradientSource
>> hideSource: false
>> live: true
>> }
>> }
>>
>> Label {
>> font.pixelSize: Theme.fontSizeExtraSmall
>> wrapMode: Text.WordWrap
>> text: "Rectangle\nShaderEffectSource"
>> }
>> }
>>
>> Column {
>> spacing: Theme.paddingSmall
>>
>> ShaderEffect {
>> property variant source: gradientTexture
>>
>> width: 100
>> height: 100
>>
>> blending: false
>> cullMode: ShaderEffect.BackFaceCulling
>> fragmentShader: "
>> varying highp vec2 qt_TexCoord0;
>> uniform lowp float qt_Opacity;
>> uniform sampler2D source;
>>
>> void main() {
>> gl_FragColor = texture2D(source,
>> qt_TexCoord0) * qt_Opacity;
>> }"
>> }
>>
>> Label {
>> font.pixelSize: Theme.fontSizeExtraSmall
>> text: "ShaderEffect"
>> }
>> }
>> }
>>
>> Button {
>> anchors.horizontalCenter: parent.horizontalCenter
>> text: "Blue gradient"
>>
>> onClicked: gradientSource.gradient =
>> gradientSource.gradients[0]
>> }
>>
>> Button {
>> anchors.horizontalCenter: parent.horizontalCenter
>> text: "Red gradient"
>>
>> onClicked: gradientSource.gradient =
>> gradientSource.gradients[1]
>> }
>> }
>> }
>> }
>>
>> It doesn't work on device though (changing Reactangle's gradient doesn't
>> update the ShaderEffectSource).
>>
>> Un-nesting the ShaderEffectSource from its source item (the Rectangle)
>> works fine both on emulator and on device:
>>
>> Page {
>> id: page
>>
>> SilicaFlickable {
>> anchors.fill: parent
>>
>> contentHeight: column.height
>>
>> Column {
>> id: column
>>
>> anchors { top: parent.top; left: parent.left; right:
>> parent.right; leftMargin: Theme.paddingLarge; rightMargin:
>> Theme.paddingLarge; }
>> spacing: Theme.paddingLarge
>>
>> PageHeader {
>> title: qsTr("ShaderEffect Test")
>> }
>>
>> Row {
>> anchors.horizontalCenter: parent.horizontalCenter
>> spacing: Theme.paddingLarge
>>
>> Column {
>> spacing: Theme.paddingSmall
>>
>> Rectangle {
>> id: gradientSource
>>
>> property list<Gradient> gradients: [
>> Gradient {
>> GradientStop { position: 0.0; color:
>> "black"; }
>> GradientStop { position: 1.0; color:
>> "blue"; }
>> },
>>
>> Gradient {
>> GradientStop { position: 0.0; color:
>> "black"; }
>> GradientStop { position: 1.0; color:
>> "red"; }
>> }
>> ]
>>
>> width: 100
>> height: 100
>>
>> gradient: gradients[0]
>> }
>>
>> Label {
>> font.pixelSize: Theme.fontSizeExtraSmall
>> text: "Rectangle"
>> }
>> }
>>
>> Column {
>> spacing: Theme.paddingSmall
>>
>> ShaderEffectSource {
>> id: gradientTexture
>>
>> width: 100
>> height: 100
>> sourceItem: gradientSource
>> hideSource: false
>> live: true
>> }
>>
>> Label {
>> font.pixelSize: Theme.fontSizeExtraSmall
>> text: "ShaderEffectSource"
>> }
>> }
>>
>> Column {
>> spacing: Theme.paddingSmall
>>
>> ShaderEffect {
>> property variant source: gradientTexture
>>
>> width: 100
>> height: 100
>>
>> blending: false
>> cullMode: ShaderEffect.BackFaceCulling
>> fragmentShader: "
>> varying highp vec2 qt_TexCoord0;
>> uniform lowp float qt_Opacity;
>> uniform sampler2D source;
>>
>> void main() {
>> gl_FragColor = texture2D(source,
>> qt_TexCoord0) * qt_Opacity;
>> }"
>> }
>>
>> Label {
>> font.pixelSize: Theme.fontSizeExtraSmall
>> text: "ShaderEffect"
>> }
>> }
>> }
>>
>> Button {
>> anchors.horizontalCenter: parent.horizontalCenter
>> text: "Blue gradient"
>>
>> onClicked: gradientSource.gradient =
>> gradientSource.gradients[0]
>> }
>>
>> Button {
>> anchors.horizontalCenter: parent.horizontalCenter
>> text: "Red gradient"
>>
>> onClicked: gradientSource.gradient =
>> gradientSource.gradients[1]
>> }
>> }
>> }
>> }
>>
>> Is it a bug?
>>
>> --
>> Luca Donaggio
>>
>
>
>
> --
> Luca Donaggio
>
>
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--
Luca Donaggio
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