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Commit b69d07e6 authored by Prabhat Awasthi's avatar Prabhat Awasthi Committed by Steve Kondik
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Use highp precision for scaled coordination 

If scaled coordination is closer to zero than what
the medium precision can store, distance becomes
zero and it causes divided by zero.

Change-Id: I8ee921dd1f57564a442e685266b12d95fc08e165
parent a5134125

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

+2 −1
Original line number Original line Diff line number Diff line
@@ -66,7 +66,8 @@ public class FisheyeFilter extends Filter { 
            "void main() {\n" +

            "void main() {\n" +

            "  const float m_pi_2 = 1.570963;\n" +

            "  const float m_pi_2 = 1.570963;\n" +

            "  vec2 coord = v_texcoord - vec2(0.5, 0.5);\n" +

            "  vec2 coord = v_texcoord - vec2(0.5, 0.5);\n" +

            "  float dist = length(coord * scale);\n" +

            "  highp vec2 scaled_coord = coord * scale;\n" +

            "  float dist = length(scaled_coord);\n" +

            "  float radian = m_pi_2 - atan(alpha * sqrt(radius2 - dist * dist), dist);\n" +

            "  float radian = m_pi_2 - atan(alpha * sqrt(radius2 - dist * dist), dist);\n" +

            "  float scalar = radian * factor / dist;\n" +

            "  float scalar = radian * factor / dist;\n" +

            "  vec2 new_coord = coord * scalar + vec2(0.5, 0.5);\n" +

            "  vec2 new_coord = coord * scalar + vec2(0.5, 0.5);\n" +