First Commit

externals/glslang/Test/spv.precise.tese

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+#version 310 es
+#extension GL_EXT_tessellation_shader : require
+#extension GL_EXT_gpu_shader5 : require
+
+layout(triangles, equal_spacing) in;
+
+layout(location = 0) in highp vec2 in_te_position[];
+
+layout(location = 0) out mediump vec4 in_f_color;
+
+precise gl_Position;
+
+void main(void) {
+  highp vec2 pos = gl_TessCoord.x * in_te_position[0] +
+                   gl_TessCoord.y * in_te_position[1] +
+                   gl_TessCoord.z * in_te_position[2];
+
+  highp float f =
+      sqrt(3.0 * min(gl_TessCoord.x, min(gl_TessCoord.y, gl_TessCoord.z))) *
+          0.5 +
+      0.5;
+  in_f_color = vec4(gl_TessCoord * f, 1.0);
+
+  // Offset the position slightly, based on the parity of the bits in the float
+  // representation.
+  // This is done to detect possible small differences in edge vertex positions
+  // between patches.
+  uvec2 bits = floatBitsToUint(pos);
+  uint numBits = 0u;
+  for (uint i = 0u; i < 32u; i++)
+    numBits +=
+        ((bits[0] << i) & 1u) + ((bits[1] << i) & 1u);
+  pos += float(numBits & 1u) * 0.04;
+
+  gl_Position = vec4(pos, 0.0, 1.0);
+}