GL: Support OES_shader_image_atomic

src/libANGLE/renderer/gl/renderergl_utils.cpp

@@ -1570,6 +1570,18 @@ void GenerateCaps(const FunctionsGL *functions,
         caps->maxClipDistances = 0;
     }
 
+    // GL_OES_shader_image_atomic
+    //
+    // Note that imageAtomicExchange() is allowed to accept float textures (of r32f format) in this
+    // extension, but that's not supported by ARB_shader_image_load_store which this extension is
+    // based on, neither in the spec it was merged into it.  This support was only added to desktop
+    // GLSL in version 4.5
+    if (functions->isAtLeastGL(gl::Version(4, 5)) || functions->isAtLeastGLES(gl::Version(3, 2)) ||
+        functions->hasGLESExtension("GL_OES_shader_image_atomic"))
+    {
+        extensions->shaderImageAtomicOES = true;
+    }
+
     // GL_OES_texture_buffer
     if (functions->isAtLeastGL(gl::Version(4, 3)) || functions->isAtLeastGLES(gl::Version(3, 2)) ||
         functions->hasGLESExtension("GL_OES_texture_buffer") ||

src/tests/deqp_support/deqp_gles31_test_expectations.txt

@@ -110,6 +110,7 @@
 1442 OPENGL : dEQP-GLES31.functional.program_interface_query.uniform.random.* = FAIL
 1442 OPENGL : dEQP-GLES31.functional.program_interface_query.uniform_block.referenced_by.* = FAIL
 4933 OPENGL : dEQP-GLES31.functional.texture.texture_buffer.render_modify.as_fragment_texture.mapbuffer_* = FAIL
+5353 NVIDIA OPENGL : dEQP-GLES31.functional.image_load_store.*.atomic.exchange_r32f* = FAIL
 
 // Slow / timeout on Linux GL
 5197 LINUX OPENGL : dEQP-GLES31.functional.compute.indirect_dispatch.gen_in_compute.large_offset = TIMEOUT