Enable more tests for the OpenGL backend.

src/tests/end2end_tests/BlendMinMaxTest.cpp

 #include "ANGLETest.h"
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(BlendMinMaxTest, ES2_D3D9, ES2_D3D11);
+ANGLE_TYPED_TEST_CASE(BlendMinMaxTest, ES2_D3D9, ES2_D3D11, ES2_OPENGL);
 
 template<typename T>
 class BlendMinMaxTest : public ANGLETest
@@ -34,6 +34,12 @@ protected:
 
     void runTest()
     {
+        if (getClientVersion() < 3 && !extensionEnabled("GL_EXT_blend_minmax"))
+        {
+            std::cout << "Test skipped because ES3 or GL_EXT_blend_minmax is not available." << std::endl;
+            return;
+        }
+
         const size_t colorCount = 1024;
         Color colors[colorCount];
         for (size_t i = 0; i < colorCount; i++)
@@ -148,12 +154,24 @@ TYPED_TEST(BlendMinMaxTest, RGBA8)
 
 TYPED_TEST(BlendMinMaxTest, RGBA32f)
 {
+    if (getClientVersion() < 3 && !extensionEnabled("GL_OES_texture_float"))
+    {
+        std::cout << "Test skipped because ES3 or GL_OES_texture_float is not available." << std::endl;
+        return;
+    }
+
     SetUpFramebuffer(GL_RGBA32F);
     runTest();
 }
 
 TYPED_TEST(BlendMinMaxTest, RGBA16F)
 {
+    if (getClientVersion() < 3 && !extensionEnabled("GL_OES_texture_half_float"))
+    {
+        std::cout << "Test skipped because ES3 or GL_OES_texture_half_float is not available." << std::endl;
+        return;
+    }
+
     SetUpFramebuffer(GL_RGBA16F);
     runTest();
 }

src/tests/end2end_tests/BufferDataTest.cpp

@@ -3,7 +3,7 @@
 #include <cstdint>
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(BufferDataTest, ES2_D3D9, ES2_D3D11);
+ANGLE_TYPED_TEST_CASE(BufferDataTest, ES2_D3D9, ES2_D3D11, ES2_OPENGL);
 
 template<typename T>
 class BufferDataTest : public ANGLETest

src/tests/end2end_tests/CompressedTextureTest.cpp

@@ -2,7 +2,7 @@
 #include "media/pixel.inl"
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(CompressedTextureTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3);
+ANGLE_TYPED_TEST_CASE(CompressedTextureTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3, ES2_OPENGL, ES3_OPENGL);
 
 template<typename T>
 class CompressedTextureTest : public ANGLETest
@@ -72,8 +72,9 @@ protected:
 
 TYPED_TEST(CompressedTextureTest, CompressedTexImage)
 {
-    if (getClientVersion() < 3 && !extensionEnabled("GL_EXT_texture_compression_dxt1"))
+    if (!extensionEnabled("GL_EXT_texture_compression_dxt1"))
     {
+        std::cout << "Test skipped because GL_EXT_texture_compression_dxt1 is not available." << std::endl;
         return;
     }
 
@@ -112,13 +113,15 @@ TYPED_TEST(CompressedTextureTest, CompressedTexImage)
 
 TYPED_TEST(CompressedTextureTest, CompressedTexStorage)
 {
-    if (getClientVersion() < 3 && !extensionEnabled("GL_EXT_texture_compression_dxt1"))
+    if (!extensionEnabled("GL_EXT_texture_compression_dxt1"))
     {
+        std::cout << "Test skipped due to missing GL_EXT_texture_compression_dxt1" << std::endl;
         return;
     }
 
     if (getClientVersion() < 3 && (!extensionEnabled("GL_EXT_texture_storage") || !extensionEnabled("GL_OES_rgb8_rgba8")))
     {
+        std::cout << "Test skipped due to missing ES3 or GL_EXT_texture_storage or GL_OES_rgb8_rgba8" << std::endl;
         return;
     }
 

src/tests/end2end_tests/MipmapTest.cpp

@@ -2,7 +2,7 @@
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
 // Note: we run these tests against 9_3 on WARP due to hardware driver issues on Win7
-ANGLE_TYPED_TEST_CASE(MipmapTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3_WARP);
+ANGLE_TYPED_TEST_CASE(MipmapTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3_WARP, ES2_OPENGL, ES3_OPENGL);
 ANGLE_TYPED_TEST_CASE(MipmapTestES3, ES3_D3D11);
 
 template<typename T>

src/tests/end2end_tests/ReadPixelsTest.cpp

@@ -299,6 +299,12 @@ TYPED_TEST(ReadPixelsTest, DrawWithPBO)
 
 TYPED_TEST(ReadPixelsTest, MultisampledPBO)
 {
+    if (getClientVersion() < 3 && !extensionEnabled("GL_ANGLE_framebuffer_multisample"))
+    {
+        std::cout << "Test skipped because ES3 or GL_ANGLE_framebuffer_multisample is not available." << std::endl;
+        return;
+    }
+
     GLuint fbo;
     glGenFramebuffers(1, &fbo);
     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
@@ -306,7 +312,15 @@ TYPED_TEST(ReadPixelsTest, MultisampledPBO)
     GLuint rbo;
     glGenRenderbuffers(1, &rbo);
     glBindRenderbuffer(GL_RENDERBUFFER, rbo);
-    glRenderbufferStorageMultisampleANGLE(GL_RENDERBUFFER, 2, GL_RGBA8, 4, 4);
+
+    if (extensionEnabled("GL_ANGLE_framebuffer_multisample"))
+    {
+        glRenderbufferStorageMultisampleANGLE(GL_RENDERBUFFER, 2, GL_RGBA8, 4, 4);
+    }
+    else
+    {
+        glRenderbufferStorageMultisample(GL_RENDERBUFFER, 2, GL_RGBA8, 4, 4);
+    }
 
     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbo);
 

src/tests/end2end_tests/SRGBTextureTest.cpp

 #include "ANGLETest.h"
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(SRGBTextureTest, ES2_D3D9, ES2_D3D11, ES3_D3D11);
+ANGLE_TYPED_TEST_CASE(SRGBTextureTest, ES2_D3D9, ES2_D3D11, ES3_D3D11, ES2_OPENGL);
 
 template<typename T>
 class SRGBTextureTest : public ANGLETest

src/tests/end2end_tests/TextureTest.cpp

 #include "ANGLETest.h"
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(TextureTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3);
+ANGLE_TYPED_TEST_CASE(TextureTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3, ES2_OPENGL);
 
 template<typename T>
 class TextureTest : public ANGLETest

src/tests/end2end_tests/UnpackAlignmentTest.cpp

@@ -3,7 +3,7 @@
 #include <array>
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(UnpackAlignmentTest, ES2_D3D9, ES2_D3D11);
+ANGLE_TYPED_TEST_CASE(UnpackAlignmentTest, ES2_D3D9, ES2_D3D11, ES2_OPENGL, ES3_OPENGL);
 
 template<typename T>
 class UnpackAlignmentTest : public ANGLETest

src/tests/end2end_tests/UnpackRowLength.cpp

 #include "ANGLETest.h"
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
-ANGLE_TYPED_TEST_CASE(UnpackRowLengthTest, ES3_D3D11, ES2_D3D11);
+ANGLE_TYPED_TEST_CASE(UnpackRowLengthTest, ES3_D3D11, ES2_D3D11, ES2_OPENGL, ES3_OPENGL);
 
 #include <array>
 

src/tests/end2end_tests/VertexAttributeTest.cpp

@@ -2,7 +2,7 @@
 
 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
 // D3D11 Feature Level 9_3 uses different D3D formats for vertex attribs compared to Feature Levels 10_0+, so we should test them separately.
-ANGLE_TYPED_TEST_CASE(VertexAttributeTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3);
+ANGLE_TYPED_TEST_CASE(VertexAttributeTest, ES2_D3D9, ES2_D3D11, ES2_D3D11_FL9_3, ES2_OPENGL, ES3_OPENGL);
 
 template<typename T>
 class VertexAttributeTest : public ANGLETest