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| 1 |
| 2 /* |
| 3 * Copyright 2016 Google Inc. |
| 4 * |
| 5 * Use of this source code is governed by a BSD-style license that can be |
| 6 * found in the LICENSE file. |
| 7 */ |
| 8 |
| 9 #ifndef TestContext_DEFINED |
| 10 #define TestContext_DEFINED |
| 11 |
| 12 #include "GrTypes.h" |
| 13 #include "../private/SkGpuFenceSync.h" |
| 14 #include "../private/SkTemplates.h" |
| 15 |
| 16 namespace sk_gpu_test { |
| 17 /** |
| 18 * An offscreen 3D context. This class is intended for Skia's internal testing n
eeds and not |
| 19 * for general use. |
| 20 */ |
| 21 class TestContext : public SkNoncopyable { |
| 22 public: |
| 23 virtual ~TestContext(); |
| 24 |
| 25 virtual bool isValid() const = 0; |
| 26 |
| 27 bool fenceSyncSupport() const { return fFenceSync != nullptr; } |
| 28 |
| 29 bool getMaxGpuFrameLag(int *maxFrameLag) const { |
| 30 if (!fFenceSync) { |
| 31 return false; |
| 32 } |
| 33 *maxFrameLag = kMaxFrameLag; |
| 34 return true; |
| 35 } |
| 36 |
| 37 void makeCurrent() const; |
| 38 |
| 39 virtual GrBackend backend() = 0; |
| 40 virtual GrBackendContext backendContext() = 0; |
| 41 |
| 42 /** Swaps front and back buffer (if the context has such buffers) */ |
| 43 void swapBuffers(); |
| 44 |
| 45 /** |
| 46 * The only purpose of this function it to provide a means of scheduling |
| 47 * work on the GPU (since all of the subclasses create primary buffers for |
| 48 * testing that are small and not meant to be rendered to the screen). |
| 49 * |
| 50 * If the platform supports fence syncs (OpenGL 3.2+ or EGL_KHR_fence_sync), |
| 51 * this will not swap any buffers, but rather emulate triple buffer synchron
ization |
| 52 * using fences. |
| 53 * |
| 54 * Otherwise it will call the platform SwapBuffers method. This may or may |
| 55 * not perform some sort of synchronization, depending on whether the |
| 56 * drawing surface provided by the platform is double buffered. |
| 57 */ |
| 58 void waitOnSyncOrSwap(); |
| 59 |
| 60 /** |
| 61 * This notifies the context that we are deliberately testing abandoning |
| 62 * the context. It is useful for debugging contexts that would otherwise |
| 63 * test that GPU resources are properly deleted. It also allows a debugging |
| 64 * context to test that further API calls are not made by Skia GPU code. |
| 65 */ |
| 66 virtual void testAbandon(); |
| 67 |
| 68 /** |
| 69 * returns the fencesync object owned by this GLTestContext |
| 70 */ |
| 71 SkGpuFenceSync *fenceSync() { return fFenceSync; } |
| 72 |
| 73 protected: |
| 74 SkGpuFenceSync* fFenceSync; |
| 75 |
| 76 TestContext(); |
| 77 |
| 78 /** This should destroy the 3D context. */ |
| 79 virtual void teardown(); |
| 80 |
| 81 virtual void onPlatformMakeCurrent() const = 0; |
| 82 virtual void onPlatformSwapBuffers() const = 0; |
| 83 |
| 84 private: |
| 85 enum { |
| 86 kMaxFrameLag = 3 |
| 87 }; |
| 88 |
| 89 SkPlatformGpuFence fFrameFences[kMaxFrameLag - 1]; |
| 90 int fCurrentFenceIdx; |
| 91 |
| 92 typedef SkNoncopyable INHERITED; |
| 93 }; |
| 94 } // namespace sk_gpu_test |
| 95 #endif |
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