-#ifndef IS_REQUIRED_ROUNDED_CORNER
-#define IS_REQUIRED_ROUNDED_CORNER 0
-#endif
-#ifndef IS_REQUIRED_BORDERLINE
-#define IS_REQUIRED_BORDERLINE 0
-#endif
-#ifndef USER_SPACE
-#define USER_SPACE 0
-#endif
-
INPUT mediump vec2 aPosition;
OUTPUT mediump vec2 vTexCoord;
-#if IS_REQUIRED_ROUNDED_CORNER || IS_REQUIRED_BORDERLINE
+#if defined(IS_REQUIRED_ROUNDED_CORNER) || defined(IS_REQUIRED_BORDERLINE)
OUTPUT mediump vec2 vPosition;
OUTPUT mediump vec2 vRectSize;
OUTPUT mediump vec2 vOptRectSize;
-#if IS_REQUIRED_ROUNDED_CORNER
+OUTPUT mediump float vAliasMargin;
+#ifdef IS_REQUIRED_ROUNDED_CORNER
OUTPUT mediump vec4 vCornerRadius;
#endif
#endif
uniform highp vec3 uSize;
uniform mediump mat3 uAlignmentMatrix;
+#if 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;
uniform mediump vec4 offsetSizeMode;
uniform mediump vec2 origin;
uniform mediump vec2 anchorPoint;
-#if IS_REQUIRED_BORDERLINE
+#ifdef IS_REQUIRED_BORDERLINE
uniform mediump float borderlineWidth;
uniform mediump float borderlineOffset;
#endif
-#if IS_REQUIRED_ROUNDED_CORNER
-uniform mediump vec4 cornerRadius;
+#ifdef IS_REQUIRED_ROUNDED_CORNER
+uniform highp vec4 cornerRadius;
uniform mediump float cornerRadiusPolicy;
#endif
vec4 ComputeVertexPosition()
{
- vec2 visualSize = mix(uSize.xy*size, size, offsetSizeMode.zw );
- vec2 visualOffset = mix( offset, offset/uSize.xy, offsetSizeMode.xy);
+ vec2 visualSize = mix(size * uSize.xy, size, offsetSizeMode.zw );
+ vec2 visualOffset = mix(offset * uSize.xy, offset, offsetSizeMode.xy);
-#if IS_REQUIRED_ROUNDED_CORNER || IS_REQUIRED_BORDERLINE
+#if 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
-#if IS_REQUIRED_ROUNDED_CORNER
-#if IS_REQUIRED_BORDERLINE
+#ifdef IS_REQUIRED_ROUNDED_CORNER
+#ifdef IS_REQUIRED_BORDERLINE
+ mediump float maxSize = max(visualSize.x, visualSize.y) + (1.0 + clamp(borderlineOffset, -1.0, 1.0)) * borderlineWidth;
mediump float minSize = min(visualSize.x, visualSize.y) + (1.0 + clamp(borderlineOffset, -1.0, 1.0)) * borderlineWidth;
#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
-#if IS_REQUIRED_BORDERLINE
- vPosition = aPosition * (visualSize + (1.0 + clamp(borderlineOffset, -1.0, 1.0)) * borderlineWidth);
+ mediump vec4 vertexPosition = vec4(aPosition, 0.0, 1.0);
+#ifdef IS_REQUIRED_BORDERLINE
+ vPosition = aPosition * (visualSize + (1.0 + clamp(borderlineOffset, -1.0, 1.0)) * borderlineWidth + vertexMargin);
+ vertexPosition.xy *= (1.0 + ((1.0 + clamp(borderlineOffset, -1.0, 1.0)) * borderlineWidth + vertexMargin) / visualSize);
vOptRectSize -= (1.0 - clamp(borderlineOffset, -1.0, 1.0)) * 0.5 * borderlineWidth + 1.0;
-#elif IS_REQUIRED_ROUNDED_CORNER
- vPosition = aPosition * visualSize;
+#elif defined(IS_REQUIRED_ROUNDED_CORNER)
+ vPosition = aPosition * (visualSize + vertexMargin);
#else
mediump vec2 vPosition = aPosition * visualSize;
#endif
- return vec4(vPosition + anchorPoint * visualSize + (visualOffset + origin) * uSize.xy, 0.0, 1.0);
+#ifdef USER_SPACE
+ vertexPosition.xyz *= uSize;
+#endif
+
+ vTexCoord = (uAlignmentMatrix*vertexPosition.xyw).xy;
+
+ return vec4(vPosition + anchorPoint * visualSize + visualOffset + origin * uSize.xy, 0.0, 1.0);
}
void main()
{
- mediump vec4 vertexPosition = vec4(aPosition, 0.0, 1.0);
gl_Position = uMvpMatrix * ComputeVertexPosition();
-#if USER_SPACE
- vertexPosition.xyz *= uSize;
-#endif
- vTexCoord = (uAlignmentMatrix*vertexPosition.xyw).xy;
}