1 files changed, 27 insertions, 0 deletions
diff --git a/src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.vert b/src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.vert
new file mode 100644
index 0000000000..33cb7efb19
--- /dev/null
+++ b/src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.vert
@@ -0,0 +1,27 @@
+uniform highp mat4 matrix;
+uniform highp vec2 textureScale;
+uniform highp float fontScale;
+uniform highp vec4 vecDelta;
+
+attribute highp vec4 vCoord;
+attribute highp vec2 tCoord;
+
+varying highp vec3 sampleNearLeft;
+varying highp vec3 sampleNearRight;
+
+void main()
+{
+    highp vec2 sampleCoord = tCoord * textureScale;
+    gl_Position = matrix * vCoord;
+
+    // Calculate neighbor pixel position in item space.
+    highp vec3 wDelta = gl_Position.w * vecDelta.xyw;
+    highp vec3 nearLeft = vCoord.xyw - 0.25 * wDelta;
+    highp vec3 nearRight = vCoord.xyw + 0.25 * wDelta;
+
+    // Calculate neighbor texture coordinate.
+    highp vec2 scale = textureScale / fontScale;
+    highp vec2 base = sampleCoord - scale * vCoord.xy;
+    sampleNearLeft = vec3(base * nearLeft.z + scale * nearLeft.xy, nearLeft.z);
+    sampleNearRight = vec3(base * nearRight.z + scale * nearRight.xy, nearRight.z);
+}
+\ No newline at end of file