INPUT mediump vec2 aPosition;
OUTPUT mediump vec2 vTexCoord;
-#if defined(IS_REQUIRED_ROUNDED_CORNER) || defined(IS_REQUIRED_BORDERLINE)
+#if defined(IS_REQUIRED_DEBUG_VISUAL_SHADER) || defined(IS_REQUIRED_ROUNDED_CORNER) || defined(IS_REQUIRED_BORDERLINE)
OUTPUT mediump vec2 vPosition;
OUTPUT mediump vec2 vRectSize;
OUTPUT mediump vec2 vOptRectSize;
+OUTPUT mediump float vAliasMargin;
#ifdef IS_REQUIRED_ROUNDED_CORNER
OUTPUT mediump vec4 vCornerRadius;
#endif
uniform highp vec3 uSize;
uniform mediump vec4 pixelArea;
+#if defined(IS_REQUIRED_DEBUG_VISUAL_SHADER) || defined(IS_REQUIRED_ROUNDED_CORNER) || defined(IS_REQUIRED_BORDERLINE)
+// Be used when we calculate anti-alias range near 1 pixel.
+uniform highp vec3 uScale;
+#endif
+
//Visual size and offset
uniform mediump vec2 offset;
uniform highp vec2 size;
vec2 visualSize = mix(size * uSize.xy, size, offsetSizeMode.zw) + extraSize;
vec2 visualOffset = mix(offset * uSize.xy, offset, offsetSizeMode.xy);
-#if defined(IS_REQUIRED_ROUNDED_CORNER) || defined(IS_REQUIRED_BORDERLINE)
+#if defined(IS_REQUIRED_DEBUG_VISUAL_SHADER) || defined(IS_REQUIRED_ROUNDED_CORNER) || defined(IS_REQUIRED_BORDERLINE)
vRectSize = visualSize * 0.5;
vOptRectSize = vRectSize;
+
+ // Set soft anti-alias range at most 10% of visual size.
+ // The range should be inverse proportion with scale of view.
+ // To avoid divid-by-zero, let we allow minimum scale value is 0.001 (0.1%)
+ vAliasMargin = min(1.0, max(visualSize.x, visualSize.y) * 0.1) / max(0.001, max(uScale.x, uScale.y));
+
+ mediump float vertexMargin = 0.0;
#endif
#ifdef IS_REQUIRED_BORDERLINE
#ifdef IS_REQUIRED_ROUNDED_CORNER
#ifdef IS_REQUIRED_BORDERLINE
+ mediump float maxSize = max(visualSize.x, visualSize.y) + outerBorderlineSize;
mediump float minSize = min(visualSize.x, visualSize.y) + outerBorderlineSize;
#else
+ mediump float maxSize = max(visualSize.x, visualSize.y);
mediump float minSize = min(visualSize.x, visualSize.y);
#endif
vCornerRadius = mix(cornerRadius * minSize, cornerRadius, cornerRadiusPolicy);
vCornerRadius = min(vCornerRadius, minSize * 0.5);
// Optimize fragment shader. 0.2929 ~= 1.0 - sqrt(0.5)
mediump float maxRadius = max(max(vCornerRadius.x, vCornerRadius.y), max(vCornerRadius.z, vCornerRadius.w));
+ mediump float minRadius = min(min(vCornerRadius.x, vCornerRadius.y), min(vCornerRadius.z, vCornerRadius.w));
vOptRectSize -= 0.2929 * maxRadius + 1.0;
+
+ // Set vertex margin as vAliasMargin if we need to make some more fragments for alias.
+ // Do not increase margin if the minRadius is small enough rather than maxSize.
+ // TODO : We should change the magic parameter, 0.49
+ vertexMargin = 2.0 * vAliasMargin * smoothstep(maxSize * 0.49, maxSize * 0.5, minRadius);
#endif
#ifdef IS_REQUIRED_BORDERLINE
- vPosition = aPosition * (visualSize + outerBorderlineSize);
+ vPosition = aPosition * (visualSize + outerBorderlineSize + vertexMargin);
vOptRectSize -= (borderlineWidth - outerBorderlineSize * 0.5) + 1.0;
-#elif defined(IS_REQUIRED_ROUNDED_CORNER)
- vPosition = aPosition * visualSize;
+#elif defined(IS_REQUIRED_DEBUG_VISUAL_SHADER) || defined(IS_REQUIRED_ROUNDED_CORNER)
+ vPosition = aPosition * (visualSize + vertexMargin);
#else
mediump vec2 vPosition = aPosition * visualSize;
#endif
cropToMask);
vMaskTexCoord = pixelArea.xy + pixelArea.zw * (vec2(0.5) + aPosition.xy
#ifdef IS_REQUIRED_BORDERLINE
- * (1.0 + outerBorderlineSize / visualSize)
+ * (1.0 + (outerBorderlineSize + vertexMargin) / visualSize)
+#elif defined(IS_REQUIRED_ROUNDED_CORNER)
+ * (1.0 + vertexMargin / visualSize)
#endif
);
#endif
vTexCoord = finalPixelArea.xy + finalPixelArea.zw * (vec2(0.5) + aPosition.xy
#ifdef IS_REQUIRED_BORDERLINE
- * (1.0 + outerBorderlineSize / visualSize)
+ * (1.0 + (outerBorderlineSize + vertexMargin) / visualSize)
+#elif defined(IS_REQUIRED_ROUNDED_CORNER)
+ * (1.0 + vertexMargin / visualSize)
#endif
);