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/**
* Source codes are licensed under a Creative Commons Attribution 3.0 Unported
* License. http://creativecommons.org/licenses/by/3.0/
*
* SPDX license identifier: CC-BY-3.0
*
* Initial code writters can be contacted at: info@quitcoding.com
*
* Copyright (C) 2015 GENIVI Alliance
*
* List of changes:
*
*/
import QtQuick 2.0
/* Simple normal mapping shader */
ShaderEffect {
id: root
// Original image
property string sourceImage
// Normal mapped image
property string normalsImage
// Lightsource which defines the position of light
property NMapLightSource lightSource
// Boost diffuse effect of this item
property real diffuseBoost: 0.0
// Light intensity from source or alternatively custom intensity for this item
property real lightIntensity: lightSource.lightIntensity
// Switch x-coordinate of normal mapped image
property bool switchX: false
// Switch y-coordinate of normal mapped image
property bool switchY: false
// Set these in case this item isn't directly under main area
property real elementPositionX: root.x
property real elementPositionY: root.y
// Optional 'colorize' effect to apply for the item, can be used for fog effect
property color colorizeColor: "#404040"
property real colorizeAmount: 0.0
// Sizes of the original pixmap
property real originalWidth: sourceImageItem.sourceSize.width
property real originalHeight: sourceImageItem.sourceSize.height
/* Private */
property real _lightPosX: lightSource.lightPosX / lightSource.width * (lightSource.width/root.width) - elementPositionX/root.width
property real _lightPosY: lightSource.lightPosY / lightSource.height * (lightSource.height/root.height) - elementPositionY/root.height
property variant _source: ShaderEffectSource { sourceItem: sourceImageItem; hideSource: true }
property variant _source2: ShaderEffectSource { sourceItem: normalsourceImageItem; hideSource: true }
width: sourceImageItem.width
height: sourceImageItem.height
Image {
id: sourceImageItem
source: sourceImage
visible: false
}
Image {
id: normalsourceImageItem
source: normalsImage
visible: false
}
fragmentShader: "
varying highp vec2 qt_TexCoord0;
uniform highp float qt_Opacity;
uniform sampler2D _source;
uniform sampler2D _source2;
uniform highp float _lightPosX;
uniform highp float _lightPosY;
uniform highp float diffuseBoost;
uniform highp float lightIntensity;
uniform highp float colorizeAmount;
uniform highp vec4 colorizeColor;
uniform bool switchX;
uniform bool switchY;
void main(void)
{
highp vec2 pixPos = qt_TexCoord0;
highp vec4 pix = texture2D(_source, pixPos.st);
highp vec4 pix2 = texture2D(_source2, pixPos.st);
highp vec3 normal = normalize(pix2.rgb * 2.0 - 1.0);
highp float xp = float(switchX) * (_lightPosX - pixPos.x) + float(!switchX) * (pixPos.x - _lightPosX);
highp float yp = float(switchY) * (_lightPosY - pixPos.y) + float(!switchY) * (pixPos.y - _lightPosY);
highp vec3 light_pos = normalize(vec3(xp, yp, lightIntensity));
highp float diffuse = max(dot(normal, light_pos), 0.2);
diffuse *= (1.0 + diffuseBoost);
highp vec4 color = vec4(diffuse * pix.rgb, pix.a);
color = mix(color, color.a * colorizeColor, colorizeAmount);
gl_FragColor = color * qt_Opacity;
}
"
}
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