From 21d22eb806fe39c73a8fd7e0e3f8ac910065bbb0 Mon Sep 17 00:00:00 2001
From: Richard Diamond <wichard@vitalitystudios.com>
Date: Sun, 12 Jun 2016 15:13:22 -0500
Subject: [PATCH] Check for GLES 3 in a few places. This is not comprehensive.

Fixes #1482.
---
 src/image_format.rs   | 23 ++++++++++++++++-------
 src/program/raw.rs    |  3 ++-
 src/sampler_object.rs |  1 +
 src/uniforms/bind.rs  |  1 +
 4 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/src/image_format.rs b/src/image_format.rs
index 3eb97273c43..ad0a2ffd68b 100644
--- a/src/image_format.rs
+++ b/src/image_format.rs
@@ -905,8 +905,10 @@ impl UncompressedUintFormat {
 
         match self {
             &UncompressedUintFormat::U8 => {
-                version >= &Version(Api::Gl, 3, 0) || (extensions.gl_ext_texture_integer &&
-                                                       extensions.gl_arb_texture_rg)
+                version >= &Version(Api::Gl, 3, 0) ||
+                    version >= &Version(Api::GlEs, 3, 0) ||
+                    (extensions.gl_ext_texture_integer &&
+                     extensions.gl_arb_texture_rg)
             },
 
             &UncompressedUintFormat::U16 => {
@@ -915,8 +917,10 @@ impl UncompressedUintFormat {
             },
 
             &UncompressedUintFormat::U32 => {
-                version >= &Version(Api::Gl, 3, 0) || (extensions.gl_ext_texture_integer &&
-                                                       extensions.gl_arb_texture_rg)
+                version >= &Version(Api::Gl, 3, 0) ||
+                    version >= &Version(Api::GlEs, 3, 0) ||
+                    (extensions.gl_ext_texture_integer &&
+                     extensions.gl_arb_texture_rg)
             },
 
             &UncompressedUintFormat::U8U8 => {
@@ -1234,11 +1238,15 @@ impl DepthFormat {
 
         match self {
             &DepthFormat::I16 => {
-                version >= &Version(Api::Gl, 3, 0) || extensions.gl_arb_depth_texture
+                version >= &Version(Api::Gl, 3, 0) ||
+                    version >= &Version(Api::GlEs, 3, 0) ||
+                    extensions.gl_arb_depth_texture
             },
 
             &DepthFormat::I24 => {
-                version >= &Version(Api::Gl, 3, 0) || extensions.gl_arb_depth_texture
+                version >= &Version(Api::Gl, 3, 0) ||
+                    version >= &Version(Api::GlEs, 3, 0) ||
+                    extensions.gl_arb_depth_texture
             },
 
             &DepthFormat::I32 => {
@@ -1246,7 +1254,8 @@ impl DepthFormat {
             },
 
             &DepthFormat::F32 => {
-                version >= &Version(Api::Gl, 3, 0)
+                version >= &Version(Api::Gl, 3, 0) ||
+                    version >= &Version(Api::GlEs, 3, 0)
             },
         }
     }
diff --git a/src/program/raw.rs b/src/program/raw.rs
index c8443d297c9..07a1fb82f03 100644
--- a/src/program/raw.rs
+++ b/src/program/raw.rs
@@ -335,7 +335,8 @@ impl RawProgram {
         let value = unsafe {
             match self.id {
                 Handle::Id(id) => {
-                    assert!(ctxt.version >= &Version(Api::Gl, 2, 0));
+                    assert!(ctxt.version >= &Version(Api::Gl, 2, 0) ||
+                            ctxt.version >= &Version(Api::GlEs, 2, 0));
                     ctxt.gl.GetFragDataLocation(id, name_c.as_bytes_with_nul().as_ptr()
                                                 as *const raw::c_char)
                 },
diff --git a/src/sampler_object.rs b/src/sampler_object.rs
index 8d2de92dc08..6f2df47aca5 100644
--- a/src/sampler_object.rs
+++ b/src/sampler_object.rs
@@ -20,6 +20,7 @@ impl SamplerObject {
     pub fn new(ctxt: &mut CommandContext, behavior: &SamplerBehavior) -> SamplerObject {
         // making sure that the backend supports samplers
         assert!(ctxt.version >= &Version(Api::Gl, 3, 2) ||
+                ctxt.version >= &Version(Api::GlEs, 3, 0) ||
                 ctxt.extensions.gl_arb_sampler_objects);
 
         let sampler = unsafe {
diff --git a/src/uniforms/bind.rs b/src/uniforms/bind.rs
index 6bf5dc4ec14..3e3dadd46f9 100644
--- a/src/uniforms/bind.rs
+++ b/src/uniforms/bind.rs
@@ -642,6 +642,7 @@ fn bind_texture_uniform<P, T>(mut ctxt: &mut context::CommandContext,
 
         if ctxt.state.texture_units[texture_unit as usize].sampler != sampler {
             assert!(ctxt.version >= &Version(Api::Gl, 3, 3) ||
+                    ctxt.version >= &Version(Api::GlEs, 3, 0) ||
                     ctxt.extensions.gl_arb_sampler_objects);
 
             unsafe { ctxt.gl.BindSampler(texture_unit as gl::types::GLenum, sampler); }