According to GLSL ES spec, section 4.5.2:
"If the precision cannot be determined by this method e.g. if an entire
expression is composed only of
operands with no precision qualifier, and the result is not assigned or passed
as an argument, then it
is evaluated at the default precision of the type or greater. When this occurs
in the fragment shader,
the default precision must be defined."
---
src/egl/opengles2/es2tri.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/src/egl/opengles2/es2tri.c b/src/egl/opengles2/es2tri.c
index 6dcc1b8..349a576 100644
--- a/src/egl/opengles2/es2tri.c
+++ b/src/egl/opengles2/es2tri.c
@@ -139,6 +139,7 @@ static void
create_shaders(void)
{
static const char *fragShaderText =
+ "precision mediump float;\n"
"varying vec4 v_color;\n"
"void main() {\n"
" gl_FragColor = v_color;\n"
--
1.7.7
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