src/cc/output/gl_renderer.h

   1 // Copyright 2010 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_OUTPUT_GL_RENDERER_H_
   6 #define CC_OUTPUT_GL_RENDERER_H_
   7
   8 #include "base/cancelable_callback.h"
   9 #include "cc/base/cc_export.h"
  10 #include "cc/base/scoped_ptr_vector.h"
  11 #include "cc/output/direct_renderer.h"
  12 #include "cc/output/gl_renderer_draw_cache.h"
  13 #include "cc/output/program_binding.h"
  14 #include "cc/output/renderer.h"
  15 #include "cc/quads/checkerboard_draw_quad.h"
  16 #include "cc/quads/debug_border_draw_quad.h"
  17 #include "cc/quads/io_surface_draw_quad.h"
  18 #include "cc/quads/render_pass_draw_quad.h"
  19 #include "cc/quads/solid_color_draw_quad.h"
  20 #include "cc/quads/tile_draw_quad.h"
  21 #include "cc/quads/yuv_video_draw_quad.h"
  22 #include "ui/gfx/quad_f.h"
  23
  24 class SkBitmap;
  25
  26 namespace WebKit { class WebGraphicsContext3D; }
  27
  28 namespace cc {
  29
  30 class GLRendererShaderTest;
  31 class OutputSurface;
  32 class PictureDrawQuad;
  33 class ScopedResource;
  34 class StreamVideoDrawQuad;
  35 class TextureDrawQuad;
  36 class TextureMailboxDeleter;
  37 class GeometryBinding;
  38 class ScopedEnsureFramebufferAllocation;
  39
  40 // Class that handles drawing of composited render layers using GL.
  41 class CC_EXPORT GLRenderer : public DirectRenderer {
  42  public:
  43   static scoped_ptr<GLRenderer> Create(
  44       RendererClient* client,
  45       const LayerTreeSettings* settings,
  46       OutputSurface* output_surface,
  47       ResourceProvider* resource_provider,
  48       TextureMailboxDeleter* texture_mailbox_deleter,
  49       int highp_threshold_min,
  50       bool use_skia_gpu_backend);
  51
  52   virtual ~GLRenderer();
  53
  54   virtual const RendererCapabilities& Capabilities() const OVERRIDE;
  55
  56   WebKit::WebGraphicsContext3D* Context();
  57
  58   virtual void ViewportChanged() OVERRIDE;
  59
  60   // Waits for rendering to finish.
  61   virtual void Finish() OVERRIDE;
  62
  63   virtual void DoNoOp() OVERRIDE;
  64   virtual void SwapBuffers() OVERRIDE;
  65
  66   virtual void GetFramebufferPixels(void* pixels, gfx::Rect rect) OVERRIDE;
  67
  68   virtual bool IsContextLost() OVERRIDE;
  69
  70   virtual void SetVisible(bool visible) OVERRIDE;
  71
  72   virtual void SendManagedMemoryStats(size_t bytes_visible,
  73                                       size_t bytes_visible_and_nearby,
  74                                       size_t bytes_allocated) OVERRIDE;
  75
  76   static void DebugGLCall(WebKit::WebGraphicsContext3D* context,
  77                           const char* command,
  78                           const char* file,
  79                           int line);
  80
  81   bool CanUseSkiaGPUBackend() const;
  82
  83  protected:
  84   GLRenderer(RendererClient* client,
  85              const LayerTreeSettings* settings,
  86              OutputSurface* output_surface,
  87              ResourceProvider* resource_provider,
  88              TextureMailboxDeleter* texture_mailbox_deleter,
  89              int highp_threshold_min);
  90
  91   bool IsBackbufferDiscarded() const { return is_backbuffer_discarded_; }
  92   bool Initialize();
  93   void InitializeGrContext();
  94
  95   const gfx::QuadF& SharedGeometryQuad() const { return shared_geometry_quad_; }
  96   const GeometryBinding* SharedGeometry() const {
  97     return shared_geometry_.get();
  98   }
  99
 100   void GetFramebufferPixelsAsync(gfx::Rect rect,
 101                                  scoped_ptr<CopyOutputRequest> request);
 102   void GetFramebufferTexture(unsigned texture_id,
 103                              ResourceFormat texture_format,
 104                              gfx::Rect device_rect);
 105   void ReleaseRenderPassTextures();
 106
 107   void SetStencilEnabled(bool enabled);
 108   bool stencil_enabled() const { return stencil_shadow_; }
 109   void SetBlendEnabled(bool enabled);
 110   bool blend_enabled() const { return blend_shadow_; }
 111
 112   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) OVERRIDE;
 113   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
 114                                         const ScopedResource* resource,
 115                                         gfx::Rect target_rect) OVERRIDE;
 116   virtual void SetDrawViewport(gfx::Rect window_space_viewport) OVERRIDE;
 117   virtual void SetScissorTestRect(gfx::Rect scissor_rect) OVERRIDE;
 118   virtual void DiscardPixels(bool has_external_stencil_test,
 119                              bool draw_rect_covers_full_surface) OVERRIDE;
 120   virtual void ClearFramebuffer(DrawingFrame* frame,
 121                                 bool has_external_stencil_test) OVERRIDE;
 122   virtual void DoDrawQuad(DrawingFrame* frame, const class DrawQuad*) OVERRIDE;
 123   virtual void BeginDrawingFrame(DrawingFrame* frame) OVERRIDE;
 124   virtual void FinishDrawingFrame(DrawingFrame* frame) OVERRIDE;
 125   virtual bool FlippedFramebuffer() const OVERRIDE;
 126   virtual void EnsureScissorTestEnabled() OVERRIDE;
 127   virtual void EnsureScissorTestDisabled() OVERRIDE;
 128   virtual void CopyCurrentRenderPassToBitmap(
 129       DrawingFrame* frame,
 130       scoped_ptr<CopyOutputRequest> request) OVERRIDE;
 131   virtual void FinishDrawingQuadList() OVERRIDE;
 132
 133   // Check if quad needs antialiasing and if so, inflate the quad and
 134   // fill edge array for fragment shader.  local_quad is set to
 135   // inflated quad if antialiasing is required, otherwise it is left
 136   // unchanged.  edge array is filled with inflated quad's edge data
 137   // if antialiasing is required, otherwise it is left unchanged.
 138   // Returns true if quad requires antialiasing and false otherwise.
 139   static bool SetupQuadForAntialiasing(const gfx::Transform& device_transform,
 140                                        const DrawQuad* quad,
 141                                        gfx::QuadF* local_quad,
 142                                        float edge[24]);
 143
 144  private:
 145   friend class GLRendererShaderPixelTest;
 146   friend class GLRendererShaderTest;
 147
 148   static void ToGLMatrix(float* gl_matrix, const gfx::Transform& transform);
 149
 150   void DrawCheckerboardQuad(const DrawingFrame* frame,
 151                             const CheckerboardDrawQuad* quad);
 152   void DrawDebugBorderQuad(const DrawingFrame* frame,
 153                            const DebugBorderDrawQuad* quad);
 154   scoped_ptr<ScopedResource> DrawBackgroundFilters(
 155       DrawingFrame* frame,
 156       const RenderPassDrawQuad* quad,
 157       const gfx::Transform& contents_device_transform,
 158       const gfx::Transform& contents_device_transformInverse);
 159   void DrawRenderPassQuad(DrawingFrame* frame, const RenderPassDrawQuad* quad);
 160   void DrawSolidColorQuad(const DrawingFrame* frame,
 161                           const SolidColorDrawQuad* quad);
 162   void DrawStreamVideoQuad(const DrawingFrame* frame,
 163                            const StreamVideoDrawQuad* quad);
 164   void EnqueueTextureQuad(const DrawingFrame* frame,
 165                           const TextureDrawQuad* quad);
 166   void FlushTextureQuadCache();
 167   void DrawIOSurfaceQuad(const DrawingFrame* frame,
 168                          const IOSurfaceDrawQuad* quad);
 169   void DrawTileQuad(const DrawingFrame* frame, const TileDrawQuad* quad);
 170   void DrawContentQuad(const DrawingFrame* frame,
 171                        const ContentDrawQuadBase* quad,
 172                        ResourceProvider::ResourceId resource_id);
 173   void DrawYUVVideoQuad(const DrawingFrame* frame,
 174                         const YUVVideoDrawQuad* quad);
 175   void DrawPictureQuad(const DrawingFrame* frame,
 176                        const PictureDrawQuad* quad);
 177   void DrawPictureQuadDirectToBackbuffer(const DrawingFrame* frame,
 178                                          const PictureDrawQuad* quad);
 179
 180   void SetShaderOpacity(float opacity, int alpha_location);
 181   void SetShaderQuadF(const gfx::QuadF& quad, int quad_location);
 182   void DrawQuadGeometry(const DrawingFrame* frame,
 183                         const gfx::Transform& draw_transform,
 184                         const gfx::RectF& quad_rect,
 185                         int matrix_location);
 186   void SetUseProgram(unsigned program);
 187
 188   void CopyTextureToFramebuffer(const DrawingFrame* frame,
 189                                 int texture_id,
 190                                 gfx::Rect rect,
 191                                 const gfx::Transform& draw_matrix,
 192                                 bool flip_vertically);
 193
 194   bool UseScopedTexture(DrawingFrame* frame,
 195                         const ScopedResource* resource,
 196                         gfx::Rect viewport_rect);
 197
 198   bool MakeContextCurrent();
 199
 200   bool InitializeSharedObjects();
 201   void CleanupSharedObjects();
 202
 203   typedef base::Callback<void(scoped_ptr<CopyOutputRequest> copy_request,
 204                               bool success)>
 205       AsyncGetFramebufferPixelsCleanupCallback;
 206   void DoGetFramebufferPixels(
 207       uint8* pixels,
 208       gfx::Rect window_rect,
 209       const AsyncGetFramebufferPixelsCleanupCallback& cleanup_callback);
 210   void FinishedReadback(
 211       const AsyncGetFramebufferPixelsCleanupCallback& cleanup_callback,
 212       unsigned source_buffer,
 213       unsigned query,
 214       uint8_t* dest_pixels,
 215       gfx::Size size);
 216   void PassOnSkBitmap(scoped_ptr<SkBitmap> bitmap,
 217                       scoped_ptr<SkAutoLockPixels> lock,
 218                       scoped_ptr<CopyOutputRequest> request,
 219                       bool success);
 220
 221   void ReinitializeGrCanvas();
 222   void ReinitializeGLState();
 223
 224   virtual void DiscardBackbuffer() OVERRIDE;
 225   virtual void EnsureBackbuffer() OVERRIDE;
 226   void EnforceMemoryPolicy();
 227
 228   RendererCapabilities capabilities_;
 229
 230   unsigned offscreen_framebuffer_id_;
 231
 232   scoped_ptr<GeometryBinding> shared_geometry_;
 233   gfx::QuadF shared_geometry_quad_;
 234
 235   // This block of bindings defines all of the programs used by the compositor
 236   // itself.  Add any new programs here to GLRendererShaderTest.
 237
 238   // Tiled layer shaders.
 239   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexAlpha>
 240       TileProgram;
 241   typedef ProgramBinding<VertexShaderTileAA, FragmentShaderRGBATexClampAlphaAA>
 242       TileProgramAA;
 243   typedef ProgramBinding<VertexShaderTileAA,
 244                          FragmentShaderRGBATexClampSwizzleAlphaAA>
 245       TileProgramSwizzleAA;
 246   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexOpaque>
 247       TileProgramOpaque;
 248   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexSwizzleAlpha>
 249       TileProgramSwizzle;
 250   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexSwizzleOpaque>
 251       TileProgramSwizzleOpaque;
 252   typedef ProgramBinding<VertexShaderPosTex, FragmentShaderCheckerboard>
 253       TileCheckerboardProgram;
 254
 255   // Texture shaders.
 256   typedef ProgramBinding<VertexShaderPosTexTransform,
 257                          FragmentShaderRGBATexVaryingAlpha> TextureProgram;
 258   typedef ProgramBinding<VertexShaderPosTexTransform,
 259                          FragmentShaderRGBATexPremultiplyAlpha>
 260       NonPremultipliedTextureProgram;
 261   typedef ProgramBinding<VertexShaderPosTexTransform,
 262                          FragmentShaderTexBackgroundVaryingAlpha>
 263       TextureBackgroundProgram;
 264   typedef ProgramBinding<VertexShaderPosTexTransform,
 265                          FragmentShaderTexBackgroundPremultiplyAlpha>
 266       NonPremultipliedTextureBackgroundProgram;
 267   typedef ProgramBinding<VertexShaderPosTexTransform,
 268                          FragmentShaderRGBATexRectVaryingAlpha>
 269       TextureIOSurfaceProgram;
 270
 271   // Render surface shaders.
 272   typedef ProgramBinding<VertexShaderPosTexTransform,
 273                          FragmentShaderRGBATexAlpha> RenderPassProgram;
 274   typedef ProgramBinding<VertexShaderPosTexTransform,
 275                          FragmentShaderRGBATexAlphaMask> RenderPassMaskProgram;
 276   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 277                          FragmentShaderRGBATexAlphaAA> RenderPassProgramAA;
 278   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 279                          FragmentShaderRGBATexAlphaMaskAA>
 280       RenderPassMaskProgramAA;
 281   typedef ProgramBinding<VertexShaderPosTexTransform,
 282                          FragmentShaderRGBATexColorMatrixAlpha>
 283       RenderPassColorMatrixProgram;
 284   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 285                          FragmentShaderRGBATexAlphaMaskColorMatrixAA>
 286       RenderPassMaskColorMatrixProgramAA;
 287   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 288                          FragmentShaderRGBATexAlphaColorMatrixAA>
 289       RenderPassColorMatrixProgramAA;
 290   typedef ProgramBinding<VertexShaderPosTexTransform,
 291                          FragmentShaderRGBATexAlphaMaskColorMatrix>
 292       RenderPassMaskColorMatrixProgram;
 293
 294   // Video shaders.
 295   typedef ProgramBinding<VertexShaderVideoTransform,
 296                          FragmentShaderOESImageExternal>
 297       VideoStreamTextureProgram;
 298   typedef ProgramBinding<VertexShaderPosTexYUVStretch, FragmentShaderYUVVideo>
 299       VideoYUVProgram;
 300   typedef ProgramBinding<VertexShaderPosTexYUVStretch, FragmentShaderYUVAVideo>
 301       VideoYUVAProgram;
 302
 303   // Special purpose / effects shaders.
 304   typedef ProgramBinding<VertexShaderPos, FragmentShaderColor>
 305       DebugBorderProgram;
 306   typedef ProgramBinding<VertexShaderQuad, FragmentShaderColor>
 307       SolidColorProgram;
 308   typedef ProgramBinding<VertexShaderQuadAA, FragmentShaderColorAA>
 309       SolidColorProgramAA;
 310
 311   const TileProgram* GetTileProgram(TexCoordPrecision precision);
 312   const TileProgramOpaque* GetTileProgramOpaque(TexCoordPrecision precision);
 313   const TileProgramAA* GetTileProgramAA(TexCoordPrecision precision);
 314   const TileProgramSwizzle* GetTileProgramSwizzle(TexCoordPrecision precision);
 315   const TileProgramSwizzleOpaque* GetTileProgramSwizzleOpaque(
 316       TexCoordPrecision precision);
 317   const TileProgramSwizzleAA* GetTileProgramSwizzleAA(
 318       TexCoordPrecision precision);
 319   const TileCheckerboardProgram* GetTileCheckerboardProgram();
 320
 321   const RenderPassProgram* GetRenderPassProgram(
 322       TexCoordPrecision precision);
 323   const RenderPassProgramAA* GetRenderPassProgramAA(
 324       TexCoordPrecision precision);
 325   const RenderPassMaskProgram* GetRenderPassMaskProgram(
 326       TexCoordPrecision precision);
 327   const RenderPassMaskProgramAA* GetRenderPassMaskProgramAA(
 328       TexCoordPrecision precision);
 329   const RenderPassColorMatrixProgram* GetRenderPassColorMatrixProgram(
 330       TexCoordPrecision precision);
 331   const RenderPassColorMatrixProgramAA* GetRenderPassColorMatrixProgramAA(
 332       TexCoordPrecision precision);
 333   const RenderPassMaskColorMatrixProgram* GetRenderPassMaskColorMatrixProgram(
 334       TexCoordPrecision precision);
 335   const RenderPassMaskColorMatrixProgramAA*
 336       GetRenderPassMaskColorMatrixProgramAA(TexCoordPrecision precision);
 337
 338   const TextureProgram* GetTextureProgram(
 339       TexCoordPrecision precision);
 340   const NonPremultipliedTextureProgram* GetNonPremultipliedTextureProgram(
 341       TexCoordPrecision precision);
 342   const TextureBackgroundProgram* GetTextureBackgroundProgram(
 343       TexCoordPrecision precision);
 344   const NonPremultipliedTextureBackgroundProgram*
 345       GetNonPremultipliedTextureBackgroundProgram(TexCoordPrecision precision);
 346   const TextureIOSurfaceProgram* GetTextureIOSurfaceProgram(
 347       TexCoordPrecision precision);
 348
 349   const VideoYUVProgram* GetVideoYUVProgram(
 350       TexCoordPrecision precision);
 351   const VideoYUVAProgram* GetVideoYUVAProgram(
 352       TexCoordPrecision precision);
 353   const VideoStreamTextureProgram* GetVideoStreamTextureProgram(
 354       TexCoordPrecision precision);
 355
 356   const DebugBorderProgram* GetDebugBorderProgram();
 357   const SolidColorProgram* GetSolidColorProgram();
 358   const SolidColorProgramAA* GetSolidColorProgramAA();
 359
 360   scoped_ptr<TileProgram> tile_program_;
 361   scoped_ptr<TileProgramOpaque> tile_program_opaque_;
 362   scoped_ptr<TileProgramAA> tile_program_aa_;
 363   scoped_ptr<TileProgramSwizzle> tile_program_swizzle_;
 364   scoped_ptr<TileProgramSwizzleOpaque> tile_program_swizzle_opaque_;
 365   scoped_ptr<TileProgramSwizzleAA> tile_program_swizzle_aa_;
 366   scoped_ptr<TileCheckerboardProgram> tile_checkerboard_program_;
 367
 368   scoped_ptr<TileProgram> tile_program_highp_;
 369   scoped_ptr<TileProgramOpaque> tile_program_opaque_highp_;
 370   scoped_ptr<TileProgramAA> tile_program_aa_highp_;
 371   scoped_ptr<TileProgramSwizzle> tile_program_swizzle_highp_;
 372   scoped_ptr<TileProgramSwizzleOpaque> tile_program_swizzle_opaque_highp_;
 373   scoped_ptr<TileProgramSwizzleAA> tile_program_swizzle_aa_highp_;
 374
 375   scoped_ptr<TextureProgram> texture_program_;
 376   scoped_ptr<NonPremultipliedTextureProgram> nonpremultiplied_texture_program_;
 377   scoped_ptr<TextureBackgroundProgram> texture_background_program_;
 378   scoped_ptr<NonPremultipliedTextureBackgroundProgram>
 379       nonpremultiplied_texture_background_program_;
 380   scoped_ptr<TextureIOSurfaceProgram> texture_io_surface_program_;
 381
 382   scoped_ptr<TextureProgram> texture_program_highp_;
 383   scoped_ptr<NonPremultipliedTextureProgram>
 384       nonpremultiplied_texture_program_highp_;
 385   scoped_ptr<TextureBackgroundProgram> texture_background_program_highp_;
 386   scoped_ptr<NonPremultipliedTextureBackgroundProgram>
 387       nonpremultiplied_texture_background_program_highp_;
 388   scoped_ptr<TextureIOSurfaceProgram> texture_io_surface_program_highp_;
 389
 390   scoped_ptr<RenderPassProgram> render_pass_program_;
 391   scoped_ptr<RenderPassProgramAA> render_pass_program_aa_;
 392   scoped_ptr<RenderPassMaskProgram> render_pass_mask_program_;
 393   scoped_ptr<RenderPassMaskProgramAA> render_pass_mask_program_aa_;
 394   scoped_ptr<RenderPassColorMatrixProgram> render_pass_color_matrix_program_;
 395   scoped_ptr<RenderPassColorMatrixProgramAA>
 396       render_pass_color_matrix_program_aa_;
 397   scoped_ptr<RenderPassMaskColorMatrixProgram>
 398       render_pass_mask_color_matrix_program_;
 399   scoped_ptr<RenderPassMaskColorMatrixProgramAA>
 400       render_pass_mask_color_matrix_program_aa_;
 401
 402   scoped_ptr<RenderPassProgram> render_pass_program_highp_;
 403   scoped_ptr<RenderPassProgramAA> render_pass_program_aa_highp_;
 404   scoped_ptr<RenderPassMaskProgram> render_pass_mask_program_highp_;
 405   scoped_ptr<RenderPassMaskProgramAA> render_pass_mask_program_aa_highp_;
 406   scoped_ptr<RenderPassColorMatrixProgram>
 407       render_pass_color_matrix_program_highp_;
 408   scoped_ptr<RenderPassColorMatrixProgramAA>
 409       render_pass_color_matrix_program_aa_highp_;
 410   scoped_ptr<RenderPassMaskColorMatrixProgram>
 411       render_pass_mask_color_matrix_program_highp_;
 412   scoped_ptr<RenderPassMaskColorMatrixProgramAA>
 413       render_pass_mask_color_matrix_program_aa_highp_;
 414
 415   scoped_ptr<VideoYUVProgram> video_yuv_program_;
 416   scoped_ptr<VideoYUVAProgram> video_yuva_program_;
 417   scoped_ptr<VideoStreamTextureProgram> video_stream_texture_program_;
 418
 419   scoped_ptr<VideoYUVProgram> video_yuv_program_highp_;
 420   scoped_ptr<VideoYUVAProgram> video_yuva_program_highp_;
 421   scoped_ptr<VideoStreamTextureProgram> video_stream_texture_program_highp_;
 422
 423   scoped_ptr<DebugBorderProgram> debug_border_program_;
 424   scoped_ptr<SolidColorProgram> solid_color_program_;
 425   scoped_ptr<SolidColorProgramAA> solid_color_program_aa_;
 426
 427   WebKit::WebGraphicsContext3D* context_;
 428   gpu::ContextSupport* context_support_;
 429
 430   skia::RefPtr<GrContext> gr_context_;
 431   skia::RefPtr<SkCanvas> sk_canvas_;
 432
 433   TextureMailboxDeleter* texture_mailbox_deleter_;
 434
 435   gfx::Rect swap_buffer_rect_;
 436   gfx::Rect scissor_rect_;
 437   gfx::Rect viewport_;
 438   bool is_backbuffer_discarded_;
 439   bool is_using_bind_uniform_;
 440   bool visible_;
 441   bool is_scissor_enabled_;
 442   bool stencil_shadow_;
 443   bool blend_shadow_;
 444   unsigned program_shadow_;
 445   TexturedQuadDrawCache draw_cache_;
 446   int highp_threshold_min_;
 447   int highp_threshold_cache_;
 448
 449   struct PendingAsyncReadPixels;
 450   ScopedPtrVector<PendingAsyncReadPixels> pending_async_read_pixels_;
 451
 452   scoped_ptr<ResourceProvider::ScopedWriteLockGL> current_framebuffer_lock_;
 453
 454   scoped_refptr<ResourceProvider::Fence> last_swap_fence_;
 455
 456   SkBitmap on_demand_tile_raster_bitmap_;
 457   ResourceProvider::ResourceId on_demand_tile_raster_resource_id_;
 458
 459   DISALLOW_COPY_AND_ASSIGN(GLRenderer);
 460 };
 461
 462 // Setting DEBUG_GL_CALLS to 1 will call glGetError() after almost every GL
 463 // call made by the compositor. Useful for debugging rendering issues but
 464 // will significantly degrade performance.
 465 #define DEBUG_GL_CALLS 0
 466
 467 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 468 #define GLC(context, x)                                                        \
 469   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 470 #else
 471 #define GLC(context, x) (x)
 472 #endif
 473
 474 }  // namespace cc
 475
 476 #endif  // CC_OUTPUT_GL_RENDERER_H_