mirror of
https://bitbucket.org/smil3y/katie.git
synced 2025-02-25 19:32:57 +00:00
210 lines
9.5 KiB
QML
210 lines
9.5 KiB
QML
|
/****************************************************************************
|
||
|
|
**
|
||
|
|
** Copyright (C) 2015 The Qt Company Ltd.
|
||
|
|
** Contact: http://www.qt.io/licensing/
|
||
|
|
**
|
||
|
|
** This file is part of the QML Shaders plugin of the Qt Toolkit.
|
||
|
|
**
|
||
|
|
** $QT_BEGIN_LICENSE:LGPL$
|
||
|
|
** 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 http://www.qt.io/terms-conditions. For further
|
||
|
|
** information use the contact form at http://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 2.1 or version 3 as published by the Free
|
||
|
|
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
|
||
|
|
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
|
||
|
|
** following information to ensure the GNU Lesser General Public License
|
||
|
|
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
|
||
|
|
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
||
|
|
**
|
||
|
|
** As a special exception, The Qt Company gives you certain additional
|
||
|
|
** rights. These rights are described in The Qt Company LGPL Exception
|
||
|
|
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
||
|
|
**
|
||
|
|
** GNU General Public License Usage
|
||
|
|
** Alternatively, this file may be used under the terms of the GNU
|
||
|
|
** General Public License version 3.0 as published by the Free Software
|
||
|
|
** Foundation and appearing in the file LICENSE.GPL included in the
|
||
|
|
** packaging of this file. Please review the following information to
|
||
|
|
** ensure the GNU General Public License version 3.0 requirements will be
|
||
|
|
** met: http://www.gnu.org/copyleft/gpl.html.
|
||
|
|
**
|
||
|
|
** $QT_END_LICENSE$
|
||
|
|
**
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
import QtQuick 1.0
|
||
|
|
import Qt.labs.shaders 1.0
|
||
|
|
|
||
|
|
// Note 1. This shader implements gaussian blur without dynamic array access from inside shader loops (Optional feature in OpenGLES 2.0).
|
||
|
|
// Note 2. Shader code is generated to avoid ecessive if-else structure in fragment shader. Code re-generation (very slow!) happens if blur radius is changed.
|
||
|
|
|
||
|
|
ShaderEffectItem {
|
||
|
|
id: effect
|
||
|
|
property variant source: 0
|
||
|
|
property real deviation: Math.sqrt(-((radius+1) * (radius+1)) / (2 * Math.log(1.0 / 255.0)));
|
||
|
|
property real radius: 8;
|
||
|
|
property real deltaX: 0.0
|
||
|
|
property real deltaY: 0.0
|
||
|
|
|
||
|
|
property real gaussianSum: 0.0
|
||
|
|
property real startIndex: 0.0
|
||
|
|
property real samples: radius * 2
|
||
|
|
|
||
|
|
property variant gwts: []
|
||
|
|
property variant delta: Qt.vector3d(effect.deltaX, effect.deltaY, effect.startIndex);
|
||
|
|
property variant factor_0_2: Qt.vector3d(effect.gwts[0], effect.gwts[1], effect.gwts[2]);
|
||
|
|
property variant factor_3_5: Qt.vector3d(effect.gwts[3],effect.gwts[4],effect.gwts[5]);
|
||
|
|
property variant factor_6_8: Qt.vector3d(effect.gwts[6],effect.gwts[7],effect.gwts[8]);
|
||
|
|
property variant factor_9_11: Qt.vector3d(effect.gwts[9],effect.gwts[10],effect.gwts[11]);
|
||
|
|
property variant factor_12_14: Qt.vector3d(effect.gwts[12],effect.gwts[13],effect.gwts[14]);
|
||
|
|
property variant factor_15_17: Qt.vector3d(effect.gwts[15],effect.gwts[16],effect.gwts[17]);
|
||
|
|
property variant factor_18_20: Qt.vector3d(effect.gwts[18],effect.gwts[19],effect.gwts[20]);
|
||
|
|
property variant factor_21_23: Qt.vector3d(effect.gwts[21],effect.gwts[22],effect.gwts[23]);
|
||
|
|
property variant factor_24_26: Qt.vector3d(effect.gwts[24],effect.gwts[25],effect.gwts[26]);
|
||
|
|
property variant factor_27_29: Qt.vector3d(effect.gwts[27],effect.gwts[28],effect.gwts[29]);
|
||
|
|
property variant factor_30_32: Qt.vector3d(effect.gwts[30],effect.gwts[31],effect.gwts[32]);
|
||
|
|
|
||
|
|
//Gaussian function = h(x):=(1/sqrt(2*3.14159*(D^2))) * %e^(-(x^2)/(2*(D^2)));
|
||
|
|
function gausFunc(x){
|
||
|
|
return (1/Math.sqrt(2*3.1415926*(Math.pow(effect.deviation,2)))) * Math.pow(2.7182818,-((Math.pow(x,2))/(2*(Math.pow(effect.deviation,2)))));
|
||
|
|
}
|
||
|
|
|
||
|
|
function calcGWTS() {
|
||
|
|
var n = new Array(Math.floor(effect.samples));
|
||
|
|
var step
|
||
|
|
for (var i = 0; i < effect.samples; i++) {
|
||
|
|
step = -effect.samples/2 + i + 0.5
|
||
|
|
n[i] = gausFunc(step);
|
||
|
|
}
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
function buildFragmentShader() {
|
||
|
|
|
||
|
|
var shaderSteps = [
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_0_2.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_0_2.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_0_2.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_3_5.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_3_5.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_3_5.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_6_8.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_6_8.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_6_8.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_9_11.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_9_11.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_9_11.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_12_14.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_12_14.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_12_14.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_15_17.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_15_17.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_15_17.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_18_20.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_18_20.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_18_20.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_21_23.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_21_23.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_21_23.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_24_26.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_24_26.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_24_26.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_27_29.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_27_29.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_27_29.z; texCoord += shift;",
|
||
|
|
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_30_32.x; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_30_32.y; texCoord += shift;",
|
||
|
|
"gl_FragColor += texture2D(source, texCoord) * factor_30_32.z; texCoord += shift;"
|
||
|
|
]
|
||
|
|
|
||
|
|
var shader = fragmentShader_begin
|
||
|
|
var samples = effect.samples
|
||
|
|
if (samples > 32) {
|
||
|
|
console.log("GaussianBlur: Maximum of 32 blur samples exceeded!")
|
||
|
|
samples = 32
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var i = 0; i < samples; i++) {
|
||
|
|
shader += shaderSteps[i]
|
||
|
|
}
|
||
|
|
|
||
|
|
shader += fragmentShader_end
|
||
|
|
effect.fragmentShader = shader
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
onDeviationChanged:{
|
||
|
|
effect.startIndex = -effect.samples/2 + 0.5
|
||
|
|
effect.gwts = calcGWTS();
|
||
|
|
var sum = 0.0;
|
||
|
|
for (var j = 0; j < effect.samples; j++) {
|
||
|
|
sum += effect.gwts[j];
|
||
|
|
}
|
||
|
|
effect.gaussianSum = sum
|
||
|
|
}
|
||
|
|
|
||
|
|
Component.onCompleted:{
|
||
|
|
effect.startIndex = -effect.samples/2 + 0.5
|
||
|
|
effect.gwts = calcGWTS();
|
||
|
|
var sum = 0.0;
|
||
|
|
for (var j = 0; j < effect.samples; j++) {
|
||
|
|
sum += effect.gwts[j];
|
||
|
|
}
|
||
|
|
effect.gaussianSum = sum
|
||
|
|
buildFragmentShader()
|
||
|
|
}
|
||
|
|
|
||
|
|
onSamplesChanged: {
|
||
|
|
buildFragmentShader()
|
||
|
|
}
|
||
|
|
|
||
|
|
property string fragmentShader_begin:
|
||
|
|
"
|
||
|
|
varying mediump vec2 qt_TexCoord0;
|
||
|
|
uniform sampler2D source;
|
||
|
|
uniform highp vec3 delta;
|
||
|
|
uniform highp vec3 factor_0_2;
|
||
|
|
uniform highp vec3 factor_3_5;
|
||
|
|
uniform highp vec3 factor_6_8;
|
||
|
|
uniform highp vec3 factor_9_11;
|
||
|
|
uniform highp vec3 factor_12_14;
|
||
|
|
uniform highp vec3 factor_15_17;
|
||
|
|
uniform highp vec3 factor_18_20;
|
||
|
|
uniform highp vec3 factor_21_23;
|
||
|
|
uniform highp vec3 factor_24_26;
|
||
|
|
uniform highp vec3 factor_27_29;
|
||
|
|
uniform highp vec3 factor_30_32;
|
||
|
|
uniform highp float gaussianSum;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
highp vec2 shift = vec2(delta.x, delta.y);
|
||
|
|
highp float index = delta.z;
|
||
|
|
mediump vec2 texCoord = qt_TexCoord0 + (shift * index);
|
||
|
|
gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
|
||
|
|
"
|
||
|
|
|
||
|
|
property string fragmentShader_end:
|
||
|
|
"
|
||
|
|
if (gaussianSum > 0.0)
|
||
|
|
gl_FragColor /= gaussianSum;
|
||
|
|
}
|
||
|
|
"
|
||
|
|
}
|