Revert of Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/GrContextFactory.h

+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrContextFactory_DEFINED
+#define GrContextFactory_DEFINED
+
+#include "GrContext.h"
+#include "GrContextOptions.h"
+
+#include "gl/SkGLContext.h"
+#include "SkTArray.h"
+
+/**
+ * This is a simple class that is useful in test apps that use different
+ * GrContexts backed by different types of GL contexts. It manages creating the
+ * GL context and a GrContext that uses it. The GL/Gr contexts persist until the
+ * factory is destroyed (though the caller can always grab a ref on the returned
+ * Gr and GL contexts to make them outlive the factory).
+ */
+class GrContextFactory : SkNoncopyable {
+public:
+    enum GLContextType {
+        kNative_GLContextType,  //! OpenGL or OpenGL ES context.
+        kGL_GLContextType,      //! OpenGL context.
+        kGLES_GLContextType,    //! OpenGL ES context.
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+        kANGLE_GLContextType,    //! ANGLE on DirectX OpenGL ES context.
+#endif
+        kANGLE_GL_GLContextType, //! ANGLE on OpenGL OpenGL ES context.
+#endif
+#if SK_COMMAND_BUFFER
+        kCommandBuffer_GLContextType, //! Chromium command buffer OpenGL ES context.
+#endif
+#if SK_MESA
+        kMESA_GLContextType,  //! MESA OpenGL context
+#endif
+        kNull_GLContextType,  //! Non-rendering OpenGL mock context.
+        kDebug_GLContextType, //! Non-rendering, state verifying OpenGL context.
+        kLastGLContextType = kDebug_GLContextType
+    };
+
+    static const int kGLContextTypeCnt = kLastGLContextType + 1;
+
+    /**
+     * Options for GL context creation. For historical and testing reasons the options will default
+     * to not using GL_NV_path_rendering extension  even when the driver supports it.
+     */
+    enum GLContextOptions {
+        kNone_GLContextOptions = 0,
+        kEnableNVPR_GLContextOptions = 0x1,
+    };
+
+    static bool IsRenderingGLContext(GLContextType type) {
+        switch (type) {
+            case kNull_GLContextType:
+            case kDebug_GLContextType:
+                return false;
+            default:
+                return true;
+        }
+    }
+
+    static const char* GLContextTypeName(GLContextType type) {
+        switch (type) {
+            case kNative_GLContextType:
+                return "native";
+            case kGL_GLContextType:
+                return "gl";
+            case kGLES_GLContextType:
+                return "gles";
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+            case kANGLE_GLContextType:
+                return "angle";
+#endif
+            case kANGLE_GL_GLContextType:
+                return "angle-gl";
+#endif
+#if SK_COMMAND_BUFFER
+            case kCommandBuffer_GLContextType:
+                return "commandbuffer";
+#endif
+#if SK_MESA
+            case kMESA_GLContextType:
+                return "mesa";
+#endif
+            case kNull_GLContextType:
+                return "null";
+            case kDebug_GLContextType:
+                return "debug";
+            default:
+                SkFAIL("Unknown GL Context type.");
+        }
+    }
+
+    explicit GrContextFactory(const GrContextOptions& opts);
+    GrContextFactory();
+
+    ~GrContextFactory();
+
+    void destroyContexts();
+    void abandonContexts();
+
+    struct ContextInfo {
+        ContextInfo()
+            : fGrContext(nullptr), fGLContext(nullptr) { }
+        ContextInfo(GrContext* grContext, SkGLContext* glContext)
+            : fGrContext(grContext), fGLContext(glContext) { }
+        GrContext* fGrContext;
+        SkGLContext* fGLContext; //! Valid until the factory destroys it via abandonContexts() or
+                                 //! destroyContexts().
+    };
+
+    /**
+     * Get a context initialized with a type of GL context. It also makes the GL context current.
+     */
+    ContextInfo getContextInfo(GLContextType type,
+                               GLContextOptions options = kNone_GLContextOptions);
+    /**
+     * Get a GrContext initialized with a type of GL context. It also makes the GL context current.
+     */
+    GrContext* get(GLContextType type,
+                   GLContextOptions options = kNone_GLContextOptions) {
+        return this->getContextInfo(type, options).fGrContext;
+    }
+    const GrContextOptions& getGlobalOptions() const { return fGlobalOptions; }
+
+private:
+    struct Context {
+        GLContextType fType;
+        GLContextOptions fOptions;
+        SkGLContext*  fGLContext;
+        GrContext*    fGrContext;
+    };
+    SkTArray<Context, true> fContexts;
+    const GrContextOptions  fGlobalOptions;
+};
+
+#endif