1 files changed, 168 insertions, 0 deletions
diff --git a/tests/benchmarks/declarative/qmlshadersplugin/GaussianDirectionalBlur.qml b/tests/benchmarks/declarative/qmlshadersplugin/GaussianDirectionalBlur.qml
new file mode 100644
index 0000000..33f576b
--- /dev/null
+++ b/tests/benchmarks/declarative/qmlshadersplugin/GaussianDirectionalBlur.qml
@@ -0,0 +1,168 @@
+import Qt 4.7
+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;
+        }
+        "
+}