Cleanup GrContextFactory and make it's subclasses private

include/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
-
-#if SK_ANGLE
-    #include "gl/SkANGLEGLContext.h"
-#endif
-#include "gl/SkDebugGLContext.h"
-#if SK_MESA
-    #include "gl/SkMesaGLContext.h"
-#endif
-#include "gl/SkGLContext.h"
-#include "gl/SkNullGLContext.h"
-
-#include "GrContext.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:
-    /**
-     * Types of GL contexts supported. For historical and testing reasons the native GrContext will
-     * not use "GL_NV_path_rendering" even when the driver supports it. There is a separate context
-     * type that does not remove NVPR support and which will fail when the driver does not support
-     * the extension.
-     */
-    enum GLContextType {
-      kNative_GLContextType,
-#if SK_ANGLE
-      kANGLE_GLContextType,
-#endif
-#if SK_MESA
-      kMESA_GLContextType,
-#endif
-      /** Similar to kNative but does not filter NVPR. It will fail if the GL driver does not
-          support NVPR */
-      kNVPR_GLContextType,
-      kNull_GLContextType,
-      kDebug_GLContextType,
-
-      kLastGLContextType = kDebug_GLContextType
-    };
-
-    static const int kGLContextTypeCnt = kLastGLContextType + 1;
-
-    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 kNull_GLContextType:
-                return "null";
-#if SK_ANGLE
-            case kANGLE_GLContextType:
-                return "angle";
-#endif
-#if SK_MESA
-            case kMESA_GLContextType:
-                return "mesa";
-#endif
-            case kNVPR_GLContextType:
-                return "nvpr";
-            case kDebug_GLContextType:
-                return "debug";
-            default:
-                SkFAIL("Unknown GL Context type.");
-        }
-    }
-
-    explicit GrContextFactory(const GrContext::Options& opts) : fGlobalOptions(opts) { }
-    GrContextFactory() { }
-
-    ~GrContextFactory() { this->destroyContexts(); }
-
-    void destroyContexts() {
-        for (int i = 0; i < fContexts.count(); ++i) {
-            if (fContexts[i].fGLContext) {  //  could be abandoned.
-                fContexts[i].fGLContext->makeCurrent();
-            }
-            fContexts[i].fGrContext->unref();
-            if (fContexts[i].fGLContext) {
-                fContexts[i].fGLContext->unref();
-            }
-        }
-        fContexts.reset();
-    }
-
-    void abandonContexts() {
-        for (int i = 0; i < fContexts.count(); ++i) {
-            if (fContexts[i].fGLContext) {
-                fContexts[i].fGLContext->testAbandon();
-                SkSafeSetNull(fContexts[i].fGLContext);
-            }
-            fContexts[i].fGrContext->abandonContext();
-        }
-    }
-
-    /**
-     * Get a GrContext initialized with a type of GL context. It also makes the GL context current.
-     */
-    GrContext* get(GLContextType type, GrGLStandard forcedGpuAPI = kNone_GrGLStandard) {
-        for (int i = 0; i < fContexts.count(); ++i) {
-            if (forcedGpuAPI != kNone_GrGLStandard &&
-                forcedGpuAPI != fContexts[i].fGLContext->gl()->fStandard)
-                continue;
-
-            if (fContexts[i].fType == type) {
-                fContexts[i].fGLContext->makeCurrent();
-                return fContexts[i].fGrContext;
-            }
-        }
-        SkAutoTUnref<SkGLContext> glCtx;
-        SkAutoTUnref<GrContext> grCtx;
-        switch (type) {
-            case kNVPR_GLContextType: // fallthru
-            case kNative_GLContextType:
-                glCtx.reset(SkCreatePlatformGLContext(forcedGpuAPI));
-                break;
-#ifdef SK_ANGLE
-            case kANGLE_GLContextType:
-                glCtx.reset(SkANGLEGLContext::Create(forcedGpuAPI));
-                break;
-#endif
-#ifdef SK_MESA
-            case kMESA_GLContextType:
-                glCtx.reset(SkMesaGLContext::Create(forcedGpuAPI));
-                break;
-#endif
-            case kNull_GLContextType:
-                glCtx.reset(SkNullGLContext::Create(forcedGpuAPI));
-                break;
-            case kDebug_GLContextType:
-                glCtx.reset(SkDebugGLContext::Create(forcedGpuAPI));
-                break;
-        }
-        if (NULL == glCtx.get()) {
-            return NULL;
-        }
-
-        SkASSERT(glCtx->isValid());
-
-        // Ensure NVPR is available for the NVPR type and block it from other types.
-        SkAutoTUnref<const GrGLInterface> glInterface(SkRef(glCtx->gl()));
-        if (kNVPR_GLContextType == type) {
-            if (!glInterface->hasExtension("GL_NV_path_rendering")) {
-                return NULL;
-            }
-        } else {
-            glInterface.reset(GrGLInterfaceRemoveNVPR(glInterface));
-            if (!glInterface) {
-                return NULL;
-            }
-        }
-
-        glCtx->makeCurrent();
-        GrBackendContext p3dctx = reinterpret_cast<GrBackendContext>(glInterface.get());
-        grCtx.reset(GrContext::Create(kOpenGL_GrBackend, p3dctx, &fGlobalOptions));
-        if (!grCtx.get()) {
-            return NULL;
-        }
-        GPUContext& ctx = fContexts.push_back();
-        ctx.fGLContext = glCtx.get();
-        ctx.fGLContext->ref();
-        ctx.fGrContext = grCtx.get();
-        ctx.fGrContext->ref();
-        ctx.fType = type;
-        return ctx.fGrContext;
-    }
-
-    // Returns the GLContext of the given type. If it has not been created yet,
-    // NULL is returned instead.
-    SkGLContext* getGLContext(GLContextType type) {
-        for (int i = 0; i < fContexts.count(); ++i) {
-            if (fContexts[i].fType == type) {
-                return fContexts[i].fGLContext;
-            }
-        }
-
-        return NULL;
-    }
-
-    const GrContext::Options& getGlobalOptions() const { return fGlobalOptions; }
-
-private:
-    struct GPUContext {
-        GLContextType             fType;
-        SkGLContext*              fGLContext;
-        GrContext*                fGrContext;
-    };
-    SkTArray<GPUContext, true>    fContexts;
-    const GrContext::Options      fGlobalOptions;
-};
-
-#endif