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Port shader code example in GridMesh docs 

Pick-to: 6.0 6.1
Change-Id: Ic3a11d24fdc02fa383350997083b38407d75feab
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
This commit is contained in:
Laszlo Agocs 2021-03-03 09:49:19 +01:00
parent 1c6ed24f0e
commit ef16f8876d
1 changed files with 23 additions and 13 deletions
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36
src/quick/items/qquickshadereffectmesh.cpp
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@ -195,6 +195,10 @@ QSGGeometry *QQuickGridMesh::updateGeometry(QSGGeometry *geometry, int attrCount
resolution higher.
\table
\header
\li Result
\li QML code
\li gridmesh.vert
\row
\li \image declarative-gridmesh.png
\li \qml
@ -210,21 +214,27 @@ QSGGeometry *QQuickGridMesh::updateGeometry(QSGGeometry *geometry, int attrCount
source: "qt-logo.png"
sourceSize { width: 200; height: 200 }
}
vertexShader: "
uniform highp mat4 qt_Matrix;
attribute highp vec4 qt_Vertex;
attribute highp vec2 qt_MultiTexCoord0;
varying highp vec2 qt_TexCoord0;
uniform highp float width;
void main() {
highp vec4 pos = qt_Vertex;
highp float d = .5 * smoothstep(0., 1., qt_MultiTexCoord0.y);
pos.x = width * mix(d, 1.0 - d, qt_MultiTexCoord0.x);
gl_Position = qt_Matrix * pos;
qt_TexCoord0 = qt_MultiTexCoord0;
}"
vertexShader: "gridmesh.vert"
}
\endqml
\li \badcode
#version 440
layout(location = 0) in vec4 qt_Vertex;
layout(location = 1) in vec2 qt_MultiTexCoord0;
layout(location = 0) out vec2 qt_TexCoord0;
layout(std140, binding = 0) uniform buf {
mat4 qt_Matrix;
float qt_Opacity;
float width;
};
void main() {
vec4 pos = qt_Vertex;
float d = 0.5 * smoothstep(0.0, 1.0, qt_MultiTexCoord0.y);
pos.x = width * mix(d, 1.0 - d, qt_MultiTexCoord0.x);
gl_Position = qt_Matrix * pos;
qt_TexCoord0 = qt_MultiTexCoord0;
}
\endcode
\endtable
*/