Merge "Fix graphical artifact in the fisheye effect" am: 0b885b8096 am: f22a6f7c60 am: 1ab5ad358c (15faf876) · Commits · e / os / android_frameworks_base

media/mca/filterpacks/java/android/filterpacks/imageproc/FisheyeFilter.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,8 @@ public class FisheyeFilter extends Filter {
		private int mHeight = 0;
		private int mTarget = FrameFormat.TARGET_UNSPECIFIED;

		// The constant min_dist, below, is an arbitrary number that gives good enough precision in
		// the center of the picture without affecting the fisheye effect noticeably.
		private static final String mFisheyeShader =
		"precision mediump float;\n" +
		"uniform sampler2D tex_sampler_0;\n" +
		@@ -59,8 +61,10 @@ public class FisheyeFilter extends Filter {
		"varying vec2 v_texcoord;\n" +
		"void main() {\n" +
		" const float m_pi_2 = 1.570963;\n" +
		" const float min_dist = 0.01;\n" +
		" vec2 coord = v_texcoord - vec2(0.5, 0.5);\n" +
		" float dist = length(coord * scale);\n" +
		" dist = max(dist, min_dist);\n" +
		" float radian = m_pi_2 - atan(alpha * sqrt(radius2 - dist * dist), dist);\n" +
		" float scalar = radian * factor / dist;\n" +
		" vec2 new_coord = coord * scalar + vec2(0.5, 0.5);\n" +