1 files changed, 40 insertions, 0 deletions
diff --git a/src/quick/scenegraph/shaders_ng/distancefieldshiftedtext_a_fwidth.frag b/src/quick/scenegraph/shaders_ng/distancefieldshiftedtext_a_fwidth.frag
new file mode 100644
index 0000000000..e7112929a7
--- /dev/null
+++ b/src/quick/scenegraph/shaders_ng/distancefieldshiftedtext_a_fwidth.frag
@@ -0,0 +1,40 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#version 440
+
+layout(location = 0) in vec2 sampleCoord;
+layout(location = 1) in vec2 shiftedSampleCoord;
+
+layout(location = 0) out vec4 fragColor;
+
+layout(binding = 1) uniform sampler2D _qt_texture;
+
+layout(std140, binding = 0) uniform buf {
+#if QSHADER_VIEW_COUNT >= 2
+    mat4 matrix[QSHADER_VIEW_COUNT];
+#else
+    mat4 matrix;
+#endif
+    vec2 textureScale;
+    vec4 color;
+    float alphaMin;
+    float alphaMax;
+    // up to this point it must match distancefieldtext
+    vec4 styleColor;
+    vec2 shift;
+};
+
+void main()
+{
+    float distance = texture(_qt_texture, sampleCoord).a;
+    float f = fwidth(distance);
+    float a = smoothstep(0.5 - f, 0.5 + f, distance);
+
+    float shiftedDistance = texture(_qt_texture, shiftedSampleCoord).a;
+    float shiftedF = fwidth(shiftedDistance);
+    float shiftedA = smoothstep(0.5 - shiftedF, 0.5 + shiftedF, shiftedDistance);
+
+    vec4 shifted = styleColor * shiftedA;
+    fragColor = mix(shifted, color, a);
+}