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Improve Magnify and Ripple effects on video shader example

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Re-enable Magnify shader.
Use correct coordinates for Magnify and Ripple shader.

Task-number: QTBUG-38121
Change-Id: Ie8d962ba841d074c9ebcf3b86f948848ad6a1812
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
This commit is contained in:
Niels Weber
2014-05-05 16:16:05 +02:00
parent f31e186354
commit da77331952
5 changed files with 12 additions and 4 deletions
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4
examples/multimedia/video/qmlvideofx/qml/qmlvideofx/EffectMagnify.qml
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@@ -39,7 +39,8 @@
** **
****************************************************************************/ ****************************************************************************/
import QtQuick 2.0 import QtQuick 2.1
import QtQuick.Window 2.1
Effect { Effect {
id: root id: root
@@ -57,6 +58,7 @@ Effect {
property real posX: -1 property real posX: -1
property real posY: -1 property real posY: -1
property real pixDens: Screen.pixelDensity
QtObject { QtObject {
id: d id: d

4
examples/multimedia/video/qmlvideofx/qml/qmlvideofx/EffectRipple.qml
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@@ -39,7 +39,8 @@
** **
****************************************************************************/ ****************************************************************************/
import QtQuick 2.0 import QtQuick 2.1
import QtQuick.Window 2.1
Effect { Effect {
parameters: ListModel { parameters: ListModel {
@@ -56,6 +57,7 @@ Effect {
// Transform slider values, and bind result to shader uniforms // Transform slider values, and bind result to shader uniforms
property real amplitude: parameters.get(0).value * 0.03 property real amplitude: parameters.get(0).value * 0.03
property real n: parameters.get(1).value * 7 property real n: parameters.get(1).value * 7
property real pixDens: Screen.pixelDensity
property real time: 0 property real time: 0
NumberAnimation on time { loops: Animation.Infinite; from: 0; to: Math.PI * 2; duration: 600 } NumberAnimation on time { loops: Animation.Infinite; from: 0; to: Math.PI * 2; duration: 600 }

2
examples/multimedia/video/qmlvideofx/qml/qmlvideofx/EffectSelectionList.qml
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@@ -51,7 +51,7 @@ ListModel {
ListElement { name: "Emboss"; source: "EffectEmboss.qml" } ListElement { name: "Emboss"; source: "EffectEmboss.qml" }
ListElement { name: "Glow"; source: "EffectGlow.qml" } ListElement { name: "Glow"; source: "EffectGlow.qml" }
ListElement { name: "Isolate"; source: "EffectIsolate.qml" } ListElement { name: "Isolate"; source: "EffectIsolate.qml" }
//ListElement { name: "Magnify"; source: "EffectMagnify.qml" } ListElement { name: "Magnify"; source: "EffectMagnify.qml" }
ListElement { name: "Page curl"; source: "EffectPageCurl.qml" } ListElement { name: "Page curl"; source: "EffectPageCurl.qml" }
ListElement { name: "Pixelate"; source: "EffectPixelate.qml" } ListElement { name: "Pixelate"; source: "EffectPixelate.qml" }
ListElement { name: "Posterize"; source: "EffectPosterize.qml" } ListElement { name: "Posterize"; source: "EffectPosterize.qml" }

3
examples/multimedia/video/qmlvideofx/shaders/magnify.fsh
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@@ -50,12 +50,15 @@ uniform float targetWidth;
uniform float targetHeight; uniform float targetHeight;
uniform float posX; uniform float posX;
uniform float posY; uniform float posY;
uniform float pixDens;
void main() void main()
{ {
vec2 tc = qt_TexCoord0; vec2 tc = qt_TexCoord0;
vec2 center = vec2(posX, posY); vec2 center = vec2(posX, posY);
vec2 xy = gl_FragCoord.xy - center.xy; vec2 xy = gl_FragCoord.xy - center.xy;
xy.x -= (pixDens * 14.0);
xy.y -= (pixDens * 29.0);
float r = sqrt(xy.x * xy.x + xy.y * xy.y); float r = sqrt(xy.x * xy.x + xy.y * xy.y);
if (r < radius) { if (r < radius) {
float h = diffractionIndex * 0.5 * radius; float h = diffractionIndex * 0.5 * radius;

3
examples/multimedia/video/qmlvideofx/shaders/ripple.fsh
View File

@@ -55,12 +55,13 @@ const int ITER = 7;
const float RATE = 0.1; const float RATE = 0.1;
uniform float amplitude; uniform float amplitude;
uniform float n; uniform float n;
uniform float pixDens;
void main() void main()
{ {
vec2 uv = qt_TexCoord0.xy; vec2 uv = qt_TexCoord0.xy;
vec2 tc = uv; vec2 tc = uv;
vec2 p = vec2(-1.0 + 2.0 * gl_FragCoord.x / targetWidth, -(-1.0 + 2.0 * gl_FragCoord.y / targetHeight)); vec2 p = vec2(-1.0 + 2.0 * (gl_FragCoord.x - (pixDens * 14.0)) / targetWidth, -(-1.0 + 2.0 * (gl_FragCoord.y - (pixDens * 29.0)) / targetHeight));
float diffx = 0.0; float diffx = 0.0;
float diffy = 0.0; float diffy = 0.0;
vec4 col; vec4 col;