Lancelot test for ShaderEffect atlas textures

Task-number: QTBUG-83975
Pick-to: 5.15
Change-Id: Icfff2aa9172bf10a1918be5364f27ed6faf94575
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>

13 files changed, 107 insertions, 0 deletions

diff --git a/tests/manual/scenegraph_lancelot/data/shaders/atlas/atlas.qml b/tests/manual/scenegraph_lancelot/data/shaders/atlas/atlas.qml
new file mode 100644
index 0000000000..06c254253e
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shaders/atlas/atlas.qml
@@ -0,0 +1,51 @@
+import QtQuick 2.15
+
+Item {
+    width: 320
+    height: 480
+
+    Column {
+        spacing: 10
+        padding: 5
+
+        Repeater {
+            model: ["sand_16x16.png", "circle_16x16.png", "star_16x16.png", "square_16x16.png"]
+            Row {
+                spacing: 20
+                Image {
+                    id: img
+                    source: "../../shared/" + modelData
+                }
+
+                // Non-atlased: copies subrect of atlas to a new texture
+                ShaderEffect {
+                    width: img.width
+                    height: img.height
+                    property variant source: img
+                    fragmentShader: "qrc:shaders/gradientgrid.frag"
+                    supportsAtlasTextures: false
+                }
+
+                // Atlased: qt_MultiTexCoord0 points to the atlas subrect
+                ShaderEffect {
+                    width: img.width
+                    height: img.height
+                    property variant source: img
+                    fragmentShader: "qrc:shaders/gradientgrid.frag"
+                    supportsAtlasTextures: true
+                }
+
+                // Subrect mode: qt_MultiTexCoord0 goes from 0.0 to 1.0,
+                // and qt_Subrect_source specifies the atlas subrect
+                ShaderEffect {
+                    width: img.width
+                    height: img.height
+                    property variant source: img
+                    fragmentShader: "qrc:shaders/gradientgrid.frag"
+                    vertexShader: "qrc:shaders/subrect.vert"
+                    supportsAtlasTextures: false
+                }
+            }
+        }
+    }
+}
diff --git a/tests/manual/scenegraph_lancelot/data/shared/circle_16x16.png b/tests/manual/scenegraph_lancelot/data/shared/circle_16x16.png
new file mode 100644
index 0000000000..9d971e4638
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/circle_16x16.png
diff --git a/tests/manual/scenegraph_lancelot/data/shared/sand_16x16.png b/tests/manual/scenegraph_lancelot/data/shared/sand_16x16.png
new file mode 100644
index 0000000000..8a101a7217
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/sand_16x16.png
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/+qsb/gradientgrid.frag b/tests/manual/scenegraph_lancelot/data/shared/shaders/+qsb/gradientgrid.frag
new file mode 100644
index 0000000000..56bcd200fe
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/+qsb/gradientgrid.frag
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/+qsb/subrect.vert b/tests/manual/scenegraph_lancelot/data/shared/shaders/+qsb/subrect.vert
new file mode 100644
index 0000000000..623df9a177
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/+qsb/subrect.vert
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/compile.bat b/tests/manual/scenegraph_lancelot/data/shared/shaders/compile.bat
index 950279b9dd..e13d1f074e 100644
--- a/tests/manual/scenegraph_lancelot/data/shared/shaders/compile.bat
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/compile.bat
@@ -1,3 +1,4 @@
+qsb -b --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/subrect.vert subrect_rhi.vert
 qsb -b --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/wave.vert wave_rhi.vert
 
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/basic.frag basic_rhi.frag
@@ -11,6 +12,7 @@ qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/gradient2.frag gradient2_
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/gradient3.frag gradient3_rhi.frag
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/gradient4.frag gradient4_rhi.frag
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/gradient5.frag gradient5_rhi.frag
+qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/gradientgrid.frag gradientgrid_rhi.frag
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/property.frag property_rhi.frag
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/shadow.frag shadow_rhi.frag
 qsb --glsl "150,120,100 es" --hlsl 50 --msl 12 -o +qsb/stencil.frag stencil_rhi.frag
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/gradientgrid.frag b/tests/manual/scenegraph_lancelot/data/shared/shaders/gradientgrid.frag
new file mode 100644
index 0000000000..851f07c948
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/gradientgrid.frag
@@ -0,0 +1,9 @@
+uniform lowp sampler2D source;
+varying highp vec2 qt_TexCoord0;
+uniform lowp float qt_Opacity;
+void main() {
+    lowp float r = mod(qt_TexCoord0.x * 10.0, 1.0);
+    lowp float g = mod(qt_TexCoord0.y * 10.0, 1.0);
+    lowp float b = qt_TexCoord0.x;
+    gl_FragColor = vec4(r, g, b, 1) * texture2D(source, qt_TexCoord0).a;
+}
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/gradientgrid_rhi.frag b/tests/manual/scenegraph_lancelot/data/shared/shaders/gradientgrid_rhi.frag
new file mode 100644
index 0000000000..999629745b
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/gradientgrid_rhi.frag
@@ -0,0 +1,13 @@
+#version 440
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(binding = 1) uniform sampler2D source;
+
+void main() {
+    lowp float r = mod(qt_TexCoord0.x * 10.0, 1.0);
+    lowp float g = mod(qt_TexCoord0.y * 10.0, 1.0);
+    lowp float b = qt_TexCoord0.x;
+    fragColor = vec4(r, g, b, 1) * texture(source, qt_TexCoord0).a;
+}
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/subrect.vert b/tests/manual/scenegraph_lancelot/data/shared/shaders/subrect.vert
new file mode 100644
index 0000000000..2ab6f94c19
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/subrect.vert
@@ -0,0 +1,11 @@
+uniform highp mat4 qt_Matrix;
+attribute highp vec4 qt_Vertex;
+attribute highp vec2 qt_MultiTexCoord0;
+varying highp vec2 qt_TexCoord0;
+uniform highp vec4 qt_SubRect_source;
+
+void main()
+{
+    qt_TexCoord0 = qt_SubRect_source.xy + qt_SubRect_source.zw * qt_MultiTexCoord0;
+    gl_Position = qt_Matrix * qt_Vertex;
+}
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/subrect_rhi.vert b/tests/manual/scenegraph_lancelot/data/shared/shaders/subrect_rhi.vert
new file mode 100644
index 0000000000..96494b7149
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/subrect_rhi.vert
@@ -0,0 +1,17 @@
+#version 440
+
+layout(location = 0) in vec4 qt_Vertex;
+layout(location = 1) in vec2 qt_MultiTexCoord0;
+
+layout(location = 0) out vec2 qt_TexCoord0;
+
+layout(std140, binding = 0) uniform buf {
+    mat4 qt_Matrix;
+    vec4 qt_SubRect_source;
+} ubuf;
+
+void main()
+{
+    qt_TexCoord0 = ubuf.qt_SubRect_source.xy + ubuf.qt_SubRect_source.zw * qt_MultiTexCoord0;
+    gl_Position = ubuf.qt_Matrix * qt_Vertex;
+}
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shared.qrc b/tests/manual/scenegraph_lancelot/data/shared/shared.qrc
index 8235e02188..4bd955b2b2 100644
--- a/tests/manual/scenegraph_lancelot/data/shared/shared.qrc
+++ b/tests/manual/scenegraph_lancelot/data/shared/shared.qrc
@@ -11,9 +11,11 @@
         <file>shaders/gradient3.frag</file>
         <file>shaders/gradient4.frag</file>
         <file>shaders/gradient5.frag</file>
+        <file>shaders/gradientgrid.frag</file>
         <file>shaders/property.frag</file>
         <file>shaders/shadow.frag</file>
         <file>shaders/stencil.frag</file>
+        <file>shaders/subrect.vert</file>
         <file>shaders/wave.vert</file>
         <file>shaders/+qsb/basic.frag</file>
         <file>shaders/+qsb/basic_alpha.frag</file>
@@ -26,9 +28,11 @@
         <file>shaders/+qsb/gradient3.frag</file>
         <file>shaders/+qsb/gradient4.frag</file>
         <file>shaders/+qsb/gradient5.frag</file>
+        <file>shaders/+qsb/gradientgrid.frag</file>
         <file>shaders/+qsb/property.frag</file>
         <file>shaders/+qsb/shadow.frag</file>
         <file>shaders/+qsb/stencil.frag</file>
+        <file>shaders/+qsb/subrect.vert</file>
         <file>shaders/+qsb/wave.vert</file>
     </qresource>
 </RCC>
diff --git a/tests/manual/scenegraph_lancelot/data/shared/square_16x16.png b/tests/manual/scenegraph_lancelot/data/shared/square_16x16.png
new file mode 100644
index 0000000000..58e37c613f
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/square_16x16.png
diff --git a/tests/manual/scenegraph_lancelot/data/shared/star_16x16.png b/tests/manual/scenegraph_lancelot/data/shared/star_16x16.png
new file mode 100644
index 0000000000..930bc8dcc0
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/star_16x16.png