Make FastGlow multi backend

Change-Id: I869fe798d6e4ee0e61b6f99065338b6127d664d7
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

12 files changed, 243 insertions, 131 deletions

diff --git a/src/controls/Private/FastGlow.qml b/src/controls/Private/FastGlow.qml
index a94a3de6..1a8b7a81 100644
--- a/src/controls/Private/FastGlow.qml
+++ b/src/controls/Private/FastGlow.qml
@@ -63,75 +63,9 @@ Item {
         hideSource: visible
     }
 
-    property string __internalBlurVertexShader: OpenGLInfo.profile === OpenGLInfo.CoreProfile ? "#version 150
-        in vec4 qt_Vertex;
-        in vec2 qt_MultiTexCoord0;
-        uniform mat4 qt_Matrix;
-        uniform float yStep;
-        uniform float xStep;
-        out vec2 qt_TexCoord0;
-        out vec2 qt_TexCoord1;
-        out vec2 qt_TexCoord2;
-        out vec2 qt_TexCoord3;
-
-        void main() {
-            qt_TexCoord0 = vec2(qt_MultiTexCoord0.x + xStep, qt_MultiTexCoord0.y + yStep * 0.36);
-            qt_TexCoord1 = vec2(qt_MultiTexCoord0.x + xStep * 0.36, qt_MultiTexCoord0.y - yStep);
-            qt_TexCoord2 = vec2(qt_MultiTexCoord0.x - xStep * 0.36, qt_MultiTexCoord0.y + yStep);
-            qt_TexCoord3 = vec2(qt_MultiTexCoord0.x - xStep, qt_MultiTexCoord0.y - yStep * 0.36);
-            gl_Position = qt_Matrix * qt_Vertex;
-        }
-    " : "
-        attribute highp vec4 qt_Vertex;
-        attribute highp vec2 qt_MultiTexCoord0;
-        uniform highp mat4 qt_Matrix;
-        uniform highp float yStep;
-        uniform highp float xStep;
-        varying highp vec2 qt_TexCoord0;
-        varying highp vec2 qt_TexCoord1;
-        varying highp vec2 qt_TexCoord2;
-        varying highp vec2 qt_TexCoord3;
-
-        void main() {
-            qt_TexCoord0 = vec2(qt_MultiTexCoord0.x + xStep, qt_MultiTexCoord0.y + yStep * 0.36);
-            qt_TexCoord1 = vec2(qt_MultiTexCoord0.x + xStep * 0.36, qt_MultiTexCoord0.y - yStep);
-            qt_TexCoord2 = vec2(qt_MultiTexCoord0.x - xStep * 0.36, qt_MultiTexCoord0.y + yStep);
-            qt_TexCoord3 = vec2(qt_MultiTexCoord0.x - xStep, qt_MultiTexCoord0.y - yStep * 0.36);
-            gl_Position = qt_Matrix * qt_Vertex;
-        }
-    "
-    property string __internalBlurFragmentShader: OpenGLInfo.profile === OpenGLInfo.CoreProfile ? "#version 150
-        uniform sampler2D source;
-        uniform float qt_Opacity;
-        in vec2 qt_TexCoord0;
-        in vec2 qt_TexCoord1;
-        in vec2 qt_TexCoord2;
-        in vec2 qt_TexCoord3;
-        out vec4 fragColor;
-
-        void main() {
-            vec4 sourceColor = (texture(source, qt_TexCoord0) +
-                texture(source, qt_TexCoord1) +
-                texture(source, qt_TexCoord2) +
-                texture(source, qt_TexCoord3)) * 0.25;
-            fragColor = sourceColor * qt_Opacity;
-        }
-    " : "
-        uniform lowp sampler2D source;
-        uniform lowp float qt_Opacity;
-        varying highp vec2 qt_TexCoord0;
-        varying highp vec2 qt_TexCoord1;
-        varying highp vec2 qt_TexCoord2;
-        varying highp vec2 qt_TexCoord3;
-
-        void main() {
-            highp vec4 sourceColor = (texture2D(source, qt_TexCoord0) +
-            texture2D(source, qt_TexCoord1) +
-            texture2D(source, qt_TexCoord2) +
-            texture2D(source, qt_TexCoord3)) * 0.25;
-            gl_FragColor = sourceColor * qt_Opacity;
-        }
-    "
+    property string __internalBlurVertexShader: "qrc:/QtQuick/Controls/Shaders/blur.vert"
+
+    property string __internalBlurFragmentShader: "qrc:/QtQuick/Controls/Shaders/blur.frag"
 
     ShaderEffect {
         id: level0
@@ -391,65 +325,6 @@ Item {
 
         onLodChanged: calculateWeights()
 
-        fragmentShader: rootItem.OpenGLInfo.profile === OpenGLInfo.CoreProfile ? "#version 150
-            uniform sampler2D source1;
-            uniform sampler2D source2;
-            uniform sampler2D source3;
-            uniform sampler2D source4;
-            uniform sampler2D source5;
-            uniform float weight1;
-            uniform float weight2;
-            uniform float weight3;
-            uniform float weight4;
-            uniform float weight5;
-            uniform vec4 color;
-            uniform float spread;
-            uniform float qt_Opacity;
-            in vec2 qt_TexCoord0;
-            out vec4 fragColor;
-
-            float linearstep(float e0, float e1, float x) {
-                return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
-            }
-
-            void main() {
-                vec4 sourceColor = texture(source1, qt_TexCoord0) * weight1;
-                sourceColor += texture(source2, qt_TexCoord0) * weight2;
-                sourceColor += texture(source3, qt_TexCoord0) * weight3;
-                sourceColor += texture(source4, qt_TexCoord0) * weight4;
-                sourceColor += texture(source5, qt_TexCoord0) * weight5;
-                sourceColor = mix(vec4(0), color, linearstep(0.0, spread, sourceColor.a));
-                fragColor = sourceColor * qt_Opacity;
-            }
-        " : "
-            uniform lowp sampler2D source1;
-            uniform lowp sampler2D source2;
-            uniform lowp sampler2D source3;
-            uniform lowp sampler2D source4;
-            uniform lowp sampler2D source5;
-            uniform mediump float weight1;
-            uniform mediump float weight2;
-            uniform mediump float weight3;
-            uniform mediump float weight4;
-            uniform mediump float weight5;
-            uniform highp vec4 color;
-            uniform highp float spread;
-            uniform lowp float qt_Opacity;
-            varying mediump vec2 qt_TexCoord0;
-
-            highp float linearstep(highp float e0, highp float e1, highp float x) {
-                return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
-            }
-
-            void main() {
-                lowp vec4 sourceColor = texture2D(source1, qt_TexCoord0) * weight1;
-                sourceColor += texture2D(source2, qt_TexCoord0) * weight2;
-                sourceColor += texture2D(source3, qt_TexCoord0) * weight3;
-                sourceColor += texture2D(source4, qt_TexCoord0) * weight4;
-                sourceColor += texture2D(source5, qt_TexCoord0) * weight5;
-                sourceColor = mix(vec4(0), color, linearstep(0.0, spread, sourceColor.a));
-                gl_FragColor = sourceColor * qt_Opacity;
-            }
-        "
+        fragmentShader: "qrc:/QtQuick/Controls/Shaders/glow.frag"
     }
 }
diff --git a/src/controls/Shaders/+glslcore/blur.frag b/src/controls/Shaders/+glslcore/blur.frag
new file mode 100644
index 00000000..38895e10
--- /dev/null
+++ b/src/controls/Shaders/+glslcore/blur.frag
@@ -0,0 +1,19 @@
+#version 150
+
+uniform sampler2D source;
+uniform float qt_Opacity;
+
+in vec2 qt_TexCoord0;
+in vec2 qt_TexCoord1;
+in vec2 qt_TexCoord2;
+in vec2 qt_TexCoord3;
+
+out vec4 fragColor;
+
+void main() {
+    vec4 sourceColor = (texture(source, qt_TexCoord0) +
+        texture(source, qt_TexCoord1) +
+        texture(source, qt_TexCoord2) +
+        texture(source, qt_TexCoord3)) * 0.25;
+    fragColor = sourceColor * qt_Opacity;
+}
diff --git a/src/controls/Shaders/+glslcore/blur.vert b/src/controls/Shaders/+glslcore/blur.vert
new file mode 100644
index 00000000..1204c5fa
--- /dev/null
+++ b/src/controls/Shaders/+glslcore/blur.vert
@@ -0,0 +1,21 @@
+#version 150
+
+in vec4 qt_Vertex;
+in vec2 qt_MultiTexCoord0;
+
+uniform mat4 qt_Matrix;
+uniform float yStep;
+uniform float xStep;
+
+out vec2 qt_TexCoord0;
+out vec2 qt_TexCoord1;
+out vec2 qt_TexCoord2;
+out vec2 qt_TexCoord3;
+
+void main() {
+    qt_TexCoord0 = vec2(qt_MultiTexCoord0.x + xStep, qt_MultiTexCoord0.y + yStep * 0.36);
+    qt_TexCoord1 = vec2(qt_MultiTexCoord0.x + xStep * 0.36, qt_MultiTexCoord0.y - yStep);
+    qt_TexCoord2 = vec2(qt_MultiTexCoord0.x - xStep * 0.36, qt_MultiTexCoord0.y + yStep);
+    qt_TexCoord3 = vec2(qt_MultiTexCoord0.x - xStep, qt_MultiTexCoord0.y - yStep * 0.36);
+    gl_Position = qt_Matrix * qt_Vertex;
+}
diff --git a/src/controls/Shaders/+glslcore/glow.frag b/src/controls/Shaders/+glslcore/glow.frag
new file mode 100644
index 00000000..e1b6b07f
--- /dev/null
+++ b/src/controls/Shaders/+glslcore/glow.frag
@@ -0,0 +1,33 @@
+#version 150
+
+uniform sampler2D source1;
+uniform sampler2D source2;
+uniform sampler2D source3;
+uniform sampler2D source4;
+uniform sampler2D source5;
+uniform float weight1;
+uniform float weight2;
+uniform float weight3;
+uniform float weight4;
+uniform float weight5;
+uniform vec4 color;
+uniform float spread;
+uniform float qt_Opacity;
+
+in vec2 qt_TexCoord0;
+
+out vec4 fragColor;
+
+float linearstep(float e0, float e1, float x) {
+    return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
+}
+
+void main() {
+    vec4 sourceColor = texture(source1, qt_TexCoord0) * weight1;
+    sourceColor += texture(source2, qt_TexCoord0) * weight2;
+    sourceColor += texture(source3, qt_TexCoord0) * weight3;
+    sourceColor += texture(source4, qt_TexCoord0) * weight4;
+    sourceColor += texture(source5, qt_TexCoord0) * weight5;
+    sourceColor = mix(vec4(0), color, linearstep(0.0, spread, sourceColor.a));
+    fragColor = sourceColor * qt_Opacity;
+}
diff --git a/src/controls/Shaders/+hlsl/blur.frag b/src/controls/Shaders/+hlsl/blur.frag
new file mode 100644
index 00000000..3dbf6556
--- /dev/null
+++ b/src/controls/Shaders/+hlsl/blur.frag
@@ -0,0 +1,19 @@
+cbuffer ConstantBuffer : register(b0)
+{
+    float4x4 qt_Matrix;
+    float qt_Opacity;
+    float2 delta;
+};
+
+Texture2D source : register(t0);
+SamplerState sourceSampler : register(s0);
+
+float4 main(float4 position : SV_POSITION,
+            float2 coord0 : TEXCOORD0,
+            float2 coord1 : TEXCOORD1,
+            float2 coord2 : TEXCOORD2,
+            float2 coord3 : TEXCOORD3) : SV_TARGET
+{
+    return (source.Sample(sourceSampler, coord0) + source.Sample(sourceSampler, coord1)
+            + source.Sample(sourceSampler, coord2) + source.Sample(sourceSampler, coord3)) * 0.25 * qt_Opacity;
+}
diff --git a/src/controls/Shaders/+hlsl/blur.vert b/src/controls/Shaders/+hlsl/blur.vert
new file mode 100644
index 00000000..08ff3cf3
--- /dev/null
+++ b/src/controls/Shaders/+hlsl/blur.vert
@@ -0,0 +1,30 @@
+cbuffer ConstantBuffer : register(b0)
+{
+    float4x4 qt_Matrix;
+    float qt_Opacity;
+    float xStep;
+    float yStep;
+};
+
+struct PSInput
+{
+    float4 position : SV_POSITION;
+    float2 coord0 : TEXCOORD0;
+    float2 coord1 : TEXCOORD1;
+    float2 coord2 : TEXCOORD2;
+    float2 coord3 : TEXCOORD3;
+};
+
+PSInput main(float4 position : POSITION, float2 coord : TEXCOORD0)
+{
+    PSInput result;
+
+    result.position = mul(qt_Matrix, position);
+
+    result.coord0 = float2(coord.x + xStep, coord.y + yStep * 0.36);
+    result.coord1 = float2(coord.x + xStep * 0.36, coord.y - yStep);
+    result.coord2 = float2(coord.x - xStep * 0.36, coord.y + yStep);
+    result.coord3 = float2(coord.x - xStep, coord.y - yStep * 0.36);
+
+    return result;
+}
diff --git a/src/controls/Shaders/+hlsl/glow.frag b/src/controls/Shaders/+hlsl/glow.frag
new file mode 100644
index 00000000..887d2087
--- /dev/null
+++ b/src/controls/Shaders/+hlsl/glow.frag
@@ -0,0 +1,39 @@
+cbuffer ConstantBuffer : register(b0)
+{
+    float4x4 qt_Matrix;
+    float qt_Opacity;
+    float weight1;
+    float weight2;
+    float weight3;
+    float weight4;
+    float weight5;
+    float spread;
+    float4 color;
+};
+
+Texture2D source1 : register(t0);
+SamplerState sourceSampler1 : register(s0);
+Texture2D source2 : register(t1);
+SamplerState sourceSampler2 : register(s1);
+Texture2D source3 : register(t2);
+SamplerState sourceSampler3 : register(s2);
+Texture2D source4 : register(t3);
+SamplerState sourceSampler4 : register(s3);
+Texture2D source5 : register(t4);
+SamplerState sourceSampler5 : register(s4);
+
+float linearstep(float e0, float e1, float x)
+{
+    return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
+}
+
+float4 main(float4 position : SV_POSITION, float2 coord : TEXCOORD0) : SV_TARGET
+{
+    float4 sourceColor = source1.Sample(sourceSampler1, coord) * weight1;
+    sourceColor += source2.Sample(sourceSampler2, coord) * weight2;
+    sourceColor += source3.Sample(sourceSampler3, coord) * weight3;
+    sourceColor += source4.Sample(sourceSampler4, coord) * weight4;
+    sourceColor += source5.Sample(sourceSampler5, coord) * weight5;
+    sourceColor = lerp(float4(0.0, 0.0, 0.0, 0.0), color, linearstep(0.0, spread, sourceColor.a));
+    return sourceColor * qt_Opacity;
+}
diff --git a/src/controls/Shaders/blur.frag b/src/controls/Shaders/blur.frag
new file mode 100644
index 00000000..54939d84
--- /dev/null
+++ b/src/controls/Shaders/blur.frag
@@ -0,0 +1,15 @@
+uniform lowp sampler2D source;
+uniform lowp float qt_Opacity;
+
+varying highp vec2 qt_TexCoord0;
+varying highp vec2 qt_TexCoord1;
+varying highp vec2 qt_TexCoord2;
+varying highp vec2 qt_TexCoord3;
+
+void main() {
+    highp vec4 sourceColor = (texture2D(source, qt_TexCoord0) +
+    texture2D(source, qt_TexCoord1) +
+    texture2D(source, qt_TexCoord2) +
+    texture2D(source, qt_TexCoord3)) * 0.25;
+    gl_FragColor = sourceColor * qt_Opacity;
+}
diff --git a/src/controls/Shaders/blur.vert b/src/controls/Shaders/blur.vert
new file mode 100644
index 00000000..d7862dda
--- /dev/null
+++ b/src/controls/Shaders/blur.vert
@@ -0,0 +1,19 @@
+attribute highp vec4 qt_Vertex;
+attribute highp vec2 qt_MultiTexCoord0;
+
+uniform highp mat4 qt_Matrix;
+uniform highp float yStep;
+uniform highp float xStep;
+
+varying highp vec2 qt_TexCoord0;
+varying highp vec2 qt_TexCoord1;
+varying highp vec2 qt_TexCoord2;
+varying highp vec2 qt_TexCoord3;
+
+void main() {
+    qt_TexCoord0 = vec2(qt_MultiTexCoord0.x + xStep, qt_MultiTexCoord0.y + yStep * 0.36);
+    qt_TexCoord1 = vec2(qt_MultiTexCoord0.x + xStep * 0.36, qt_MultiTexCoord0.y - yStep);
+    qt_TexCoord2 = vec2(qt_MultiTexCoord0.x - xStep * 0.36, qt_MultiTexCoord0.y + yStep);
+    qt_TexCoord3 = vec2(qt_MultiTexCoord0.x - xStep, qt_MultiTexCoord0.y - yStep * 0.36);
+    gl_Position = qt_Matrix * qt_Vertex;
+}
diff --git a/src/controls/Shaders/glow.frag b/src/controls/Shaders/glow.frag
new file mode 100644
index 00000000..56216cd6
--- /dev/null
+++ b/src/controls/Shaders/glow.frag
@@ -0,0 +1,29 @@
+uniform lowp sampler2D source1;
+uniform lowp sampler2D source2;
+uniform lowp sampler2D source3;
+uniform lowp sampler2D source4;
+uniform lowp sampler2D source5;
+uniform mediump float weight1;
+uniform mediump float weight2;
+uniform mediump float weight3;
+uniform mediump float weight4;
+uniform mediump float weight5;
+uniform highp vec4 color;
+uniform highp float spread;
+uniform lowp float qt_Opacity;
+
+varying mediump vec2 qt_TexCoord0;
+
+highp float linearstep(highp float e0, highp float e1, highp float x) {
+    return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
+}
+
+void main() {
+    lowp vec4 sourceColor = texture2D(source1, qt_TexCoord0) * weight1;
+    sourceColor += texture2D(source2, qt_TexCoord0) * weight2;
+    sourceColor += texture2D(source3, qt_TexCoord0) * weight3;
+    sourceColor += texture2D(source4, qt_TexCoord0) * weight4;
+    sourceColor += texture2D(source5, qt_TexCoord0) * weight5;
+    sourceColor = mix(vec4(0), color, linearstep(0.0, spread, sourceColor.a));
+    gl_FragColor = sourceColor * qt_Opacity;
+}
diff --git a/src/controls/Shaders/shaders.pri b/src/controls/Shaders/shaders.pri
new file mode 100644
index 00000000..197fd11e
--- /dev/null
+++ b/src/controls/Shaders/shaders.pri
@@ -0,0 +1,10 @@
+SHADER_FILES = \
+    $$PWD/blur.vert \
+    $$PWD/blur.frag \
+    $$PWD/glow.frag \
+    $$PWD/+glslcore/blur.vert \
+    $$PWD/+glslcore/blur.frag \
+    $$PWD/+glslcore/glow.frag \
+    $$PWD/+hlsl/blur.vert \
+    $$PWD/+hlsl/blur.frag \
+    $$PWD/+hlsl/glow.frag
diff --git a/src/controls/controls.pro b/src/controls/controls.pro
index 794a6e36..8efc2271 100644
--- a/src/controls/controls.pro
+++ b/src/controls/controls.pro
@@ -51,6 +51,7 @@ OTHER_FILES += doc/src/*
 include(plugin.pri)
 include(Private/private.pri)
 include(Styles/styles.pri)
+include(Shaders/shaders.pri)
 
 osx: LIBS_PRIVATE += -framework Carbon
 
@@ -61,7 +62,8 @@ osx: LIBS_PRIVATE += -framework Carbon
     INCLUDED_RESOURCE_FILES = \
         $$CONTROLS_QML_FILES \
         $$PRIVATE_QML_FILES \
-        $$STYLES_QML_FILES
+        $$STYLES_QML_FILES \
+        $$SHADER_FILES
 
     RESOURCE_CONTENT = \
         "<RCC>" \
@@ -84,7 +86,8 @@ osx: LIBS_PRIVATE += -framework Carbon
 } else {
     QML_FILES *= $$CONTROLS_QML_FILES \
                  $$PRIVATE_QML_FILES \
-                 $$STYLES_QML_FILES
+                 $$STYLES_QML_FILES \
+                 $$SHADER_FILES
 }
 CONFIG += no_cxx_module
 load(qml_plugin)