1 files changed, 154 insertions, 0 deletions
diff --git a/gfx/angle/src/tests/gl_tests/WebGLCompatibilityTest.cpp b/gfx/angle/src/tests/gl_tests/WebGLCompatibilityTest.cpp
new file mode 100644
index 000000000..48a9d2bae
--- /dev/null
+++ b/gfx/angle/src/tests/gl_tests/WebGLCompatibilityTest.cpp
@@ -0,0 +1,154 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// WebGLCompatibilityTest.cpp : Tests of the GL_ANGLE_webgl_compatibility extension.
+
+#include "test_utils/ANGLETest.h"
+
+#include "test_utils/gl_raii.h"
+
+namespace angle
+{
+
+class WebGLCompatibilityTest : public ANGLETest
+{
+  protected:
+    WebGLCompatibilityTest()
+    {
+        setWindowWidth(128);
+        setWindowHeight(128);
+        setConfigRedBits(8);
+        setConfigGreenBits(8);
+        setConfigBlueBits(8);
+        setConfigAlphaBits(8);
+        setWebGLCompatibilityEnabled(true);
+    }
+
+    void SetUp() override
+    {
+        ANGLETest::SetUp();
+        glEnableExtensionANGLE = reinterpret_cast<PFNGLENABLEEXTENSIONANGLEPROC>(
+            eglGetProcAddress("glEnableExtensionANGLE"));
+    }
+
+    void TearDown() override { ANGLETest::TearDown(); }
+
+    PFNGLENABLEEXTENSIONANGLEPROC glEnableExtensionANGLE = nullptr;
+};
+
+// Context creation would fail if EGL_ANGLE_create_context_webgl_compatibility was not available so
+// the GL extension should always be present
+TEST_P(WebGLCompatibilityTest, ExtensionStringExposed)
+{
+    EXPECT_TRUE(extensionEnabled("GL_ANGLE_webgl_compatibility"));
+}
+
+// Verify that all extension entry points are available
+TEST_P(WebGLCompatibilityTest, EntryPoints)
+{
+    if (extensionEnabled("GL_ANGLE_webgl_compatibility"))
+    {
+        EXPECT_NE(nullptr, eglGetProcAddress("glEnableExtensionANGLE"));
+    }
+}
+
+// WebGL 1 allows GL_DEPTH_STENCIL_ATTACHMENT as a valid binding point.  Make sure it is usable,
+// even in ES2 contexts.
+TEST_P(WebGLCompatibilityTest, DepthStencilBindingPoint)
+{
+    GLRenderbuffer renderbuffer;
+    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer.get());
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, 32, 32);
+
+    GLFramebuffer framebuffer;
+    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer.get());
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
+                              renderbuffer.get());
+
+    EXPECT_GL_NO_ERROR();
+}
+
+// Test that attempting to enable an extension that doesn't exist generates GL_INVALID_OPERATION
+TEST_P(WebGLCompatibilityTest, EnableExtensionValidation)
+{
+    EXPECT_EQ(GL_FALSE, glEnableExtensionANGLE("invalid_extension_string"));
+    EXPECT_GL_ERROR(GL_INVALID_OPERATION);
+}
+
+// Test enabling the GL_OES_element_index_uint extension
+TEST_P(WebGLCompatibilityTest, EnableExtensionUintIndices)
+{
+    if (getClientMajorVersion() != 2)
+    {
+        // This test only works on ES2 where uint indices are not available by default
+        return;
+    }
+
+    EXPECT_FALSE(extensionEnabled("GL_OES_element_index_uint"));
+
+    GLBuffer indexBuffer;
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer.get());
+
+    GLuint data[] = {0, 1, 2, 1, 3, 2};
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
+
+    ANGLE_GL_PROGRAM(program, "void main() { gl_Position = vec4(0, 0, 0, 1); }",
+                     "void main() { gl_FragColor = vec4(0, 1, 0, 1); }")
+    glUseProgram(program.get());
+
+    glDrawElements(GL_TRIANGLES, 2, GL_UNSIGNED_INT, nullptr);
+    EXPECT_GL_ERROR(GL_INVALID_ENUM);
+
+    if (glEnableExtensionANGLE("GL_OES_element_index_uint"))
+    {
+        EXPECT_GL_NO_ERROR();
+        EXPECT_TRUE(extensionEnabled("GL_OES_element_index_uint"));
+
+        glDrawElements(GL_TRIANGLES, 2, GL_UNSIGNED_INT, nullptr);
+        EXPECT_GL_NO_ERROR();
+    }
+}
+
+// Verify that shaders are of a compatible spec when the extension is enabled.
+TEST_P(WebGLCompatibilityTest, ExtensionCompilerSpec)
+{
+    EXPECT_TRUE(extensionEnabled("GL_ANGLE_webgl_compatibility"));
+
+    // Use of reserved _webgl prefix should fail when the shader specification is for WebGL.
+    const std::string &vert =
+        "struct Foo {\n"
+        "    int _webgl_bar;\n"
+        "};\n"
+        "void main()\n"
+        "{\n"
+        "    Foo foo = Foo(1);\n"
+        "}";
+
+    // Default fragement shader.
+    const std::string &frag =
+        "void main()\n"
+        "{\n"
+        "    gl_FragColor = vec4(1.0,0.0,0.0,1.0);\n"
+        "}";
+
+    GLuint program = CompileProgram(vert, frag);
+    EXPECT_EQ(0u, program);
+    glDeleteProgram(program);
+}
+
+// Use this to select which configurations (e.g. which renderer, which GLES major version) these
+// tests should be run against.
+ANGLE_INSTANTIATE_TEST(WebGLCompatibilityTest,
+                       ES2_D3D9(),
+                       ES2_D3D11(),
+                       ES3_D3D11(),
+                       ES2_D3D11_FL9_3(),
+                       ES2_OPENGL(),
+                       ES3_OPENGL(),
+                       ES2_OPENGLES(),
+                       ES3_OPENGLES());
+
+}  // namespace