Add Explicit Int Precision for GLSL ES Backend

src/back/glsl/mod.rs

@@ -409,11 +409,12 @@ impl<'a, W: Write> Writer<'a, W> {
             writeln!(self.out, "#extension GL_EXT_texture_shadow_lod : require")?;
         }
 
-        // glsl es requires a precision to be specified for floats
+        // glsl es requires a precision to be specified for floats and ints
         // TODO: Should this be user configurable?
         if es {
             writeln!(self.out)?;
             writeln!(self.out, "precision highp float;")?;
+            writeln!(self.out, "precision highp int;")?;
             writeln!(self.out)?;
         }
 

tests/out/glsl/boids.main.Compute.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in;
 

tests/out/glsl/control-flow.main.Compute.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 

tests/out/glsl/empty.main.Compute.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 

tests/out/glsl/globals.main.Compute.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 

tests/out/glsl/operators.main.Compute.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 

tests/out/glsl/quad-vert.main.Vertex.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 struct type10 {
     vec2 member;

tests/out/glsl/quad.fs_extra.Fragment.glsl

@@ -1,6 +1,7 @@
 #version 300 es
 
 precision highp float;
+precision highp int;
 
 struct VertexOutput {
     vec2 uv;

tests/out/glsl/quad.main.Fragment.glsl

@@ -1,6 +1,7 @@
 #version 300 es
 
 precision highp float;
+precision highp int;
 
 struct VertexOutput {
     vec2 uv;

tests/out/glsl/quad.main.Vertex.glsl

@@ -1,6 +1,7 @@
 #version 300 es
 
 precision highp float;
+precision highp int;
 
 struct VertexOutput {
     vec2 uv;

tests/out/glsl/shadow.fs_main.Fragment.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 struct Light {
     mat4x4 proj;

tests/out/glsl/skybox.fs_main.Fragment.glsl

@@ -1,6 +1,7 @@
 #version 320 es
 
 precision highp float;
+precision highp int;
 
 struct VertexOutput {
     vec4 position;

tests/out/glsl/skybox.vs_main.Vertex.glsl

@@ -1,6 +1,7 @@
 #version 320 es
 
 precision highp float;
+precision highp int;
 
 struct VertexOutput {
     vec4 position;

tests/out/glsl/standard.derivatives.Fragment.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 layout(location = 0) out vec4 _fs2p_location0;
 

tests/out/glsl/texture-arg.main.Fragment.glsl

@@ -1,6 +1,7 @@
 #version 310 es
 
 precision highp float;
+precision highp int;
 
 uniform highp sampler2D _group_0_binding_0;