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 GeometryBinding;
  37 class ScopedEnsureFramebufferAllocation;
  38
  39 // Class that handles drawing of composited render layers using GL.
  40 class CC_EXPORT GLRenderer : public DirectRenderer {
  41  public:
  42   static scoped_ptr<GLRenderer> Create(RendererClient* client,
  43                                        OutputSurface* output_surface,
  44                                        ResourceProvider* resource_provider,
  45                                        int highp_threshold_min,
  46                                        bool use_skia_gpu_backend);
  47
  48   virtual ~GLRenderer();
  49
  50   virtual const RendererCapabilities& Capabilities() const OVERRIDE;
  51
  52   WebKit::WebGraphicsContext3D* Context();
  53
  54   virtual void ViewportChanged() OVERRIDE;
  55
  56   // Waits for rendering to finish.
  57   virtual void Finish() OVERRIDE;
  58
  59   virtual void DoNoOp() OVERRIDE;
  60   virtual void SwapBuffers() OVERRIDE;
  61
  62   virtual void GetFramebufferPixels(void* pixels, gfx::Rect rect) OVERRIDE;
  63
  64   virtual bool IsContextLost() OVERRIDE;
  65
  66   virtual void SetVisible(bool visible) OVERRIDE;
  67
  68   virtual void SendManagedMemoryStats(size_t bytes_visible,
  69                                       size_t bytes_visible_and_nearby,
  70                                       size_t bytes_allocated) OVERRIDE;
  71
  72   virtual void SetDiscardBackBufferWhenNotVisible(bool discard) OVERRIDE;
  73
  74   static void DebugGLCall(WebKit::WebGraphicsContext3D* context,
  75                           const char* command,
  76                           const char* file,
  77                           int line);
  78
  79   bool CanUseSkiaGPUBackend() const;
  80   void LazyLabelOffscreenContext();
  81
  82  protected:
  83   GLRenderer(RendererClient* client,
  84              OutputSurface* output_surface,
  85              ResourceProvider* resource_provider,
  86              int highp_threshold_min);
  87
  88   bool IsBackbufferDiscarded() const { return is_backbuffer_discarded_; }
  89   bool Initialize();
  90   void InitializeGrContext();
  91
  92   const gfx::QuadF& SharedGeometryQuad() const { return shared_geometry_quad_; }
  93   const GeometryBinding* SharedGeometry() const {
  94     return shared_geometry_.get();
  95   }
  96
  97   void GetFramebufferPixelsAsync(gfx::Rect rect,
  98                                  scoped_ptr<CopyOutputRequest> request);
  99   void GetFramebufferTexture(unsigned texture_id,
 100                              unsigned texture_format,
 101                              gfx::Rect device_rect);
 102   void ReleaseRenderPassTextures();
 103
 104   void SetStencilEnabled(bool enabled);
 105   bool stencil_enabled() const { return stencil_shadow_; }
 106   void SetBlendEnabled(bool enabled);
 107   bool blend_enabled() const { return blend_shadow_; }
 108
 109   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) OVERRIDE;
 110   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
 111                                         const ScopedResource* resource,
 112                                         gfx::Rect target_rect) OVERRIDE;
 113   virtual void SetDrawViewport(gfx::Rect window_space_viewport) OVERRIDE;
 114   virtual void SetScissorTestRect(gfx::Rect scissor_rect) OVERRIDE;
 115   virtual void ClearFramebuffer(DrawingFrame* frame) OVERRIDE;
 116   virtual void DoDrawQuad(DrawingFrame* frame, const class DrawQuad*) OVERRIDE;
 117   virtual void BeginDrawingFrame(DrawingFrame* frame) OVERRIDE;
 118   virtual void FinishDrawingFrame(DrawingFrame* frame) OVERRIDE;
 119   virtual bool FlippedFramebuffer() const OVERRIDE;
 120   virtual void EnsureScissorTestEnabled() OVERRIDE;
 121   virtual void EnsureScissorTestDisabled() OVERRIDE;
 122   virtual void CopyCurrentRenderPassToBitmap(
 123       DrawingFrame* frame,
 124       scoped_ptr<CopyOutputRequest> request) OVERRIDE;
 125   virtual void FinishDrawingQuadList() OVERRIDE;
 126
 127  private:
 128   friend class GLRendererShaderPixelTest;
 129   friend class GLRendererShaderTest;
 130
 131   static void ToGLMatrix(float* gl_matrix, const gfx::Transform& transform);
 132
 133   void DrawCheckerboardQuad(const DrawingFrame* frame,
 134                             const CheckerboardDrawQuad* quad);
 135   void DrawDebugBorderQuad(const DrawingFrame* frame,
 136                            const DebugBorderDrawQuad* quad);
 137   scoped_ptr<ScopedResource> DrawBackgroundFilters(
 138       DrawingFrame* frame,
 139       const RenderPassDrawQuad* quad,
 140       const gfx::Transform& contents_device_transform,
 141       const gfx::Transform& contents_device_transformInverse);
 142   void DrawRenderPassQuad(DrawingFrame* frame, const RenderPassDrawQuad* quad);
 143   void DrawSolidColorQuad(const DrawingFrame* frame,
 144                           const SolidColorDrawQuad* quad);
 145   void DrawStreamVideoQuad(const DrawingFrame* frame,
 146                            const StreamVideoDrawQuad* quad);
 147   void EnqueueTextureQuad(const DrawingFrame* frame,
 148                           const TextureDrawQuad* quad);
 149   void FlushTextureQuadCache();
 150   void DrawIOSurfaceQuad(const DrawingFrame* frame,
 151                          const IOSurfaceDrawQuad* quad);
 152   void DrawTileQuad(const DrawingFrame* frame, const TileDrawQuad* quad);
 153   void DrawContentQuad(const DrawingFrame* frame,
 154                        const ContentDrawQuadBase* quad,
 155                        ResourceProvider::ResourceId resource_id);
 156   void DrawYUVVideoQuad(const DrawingFrame* frame,
 157                         const YUVVideoDrawQuad* quad);
 158   void DrawPictureQuad(const DrawingFrame* frame,
 159                        const PictureDrawQuad* quad);
 160   void DrawPictureQuadDirectToBackbuffer(const DrawingFrame* frame,
 161                                          const PictureDrawQuad* quad);
 162
 163   void SetShaderOpacity(float opacity, int alpha_location);
 164   void SetShaderQuadF(const gfx::QuadF& quad, int quad_location);
 165   void DrawQuadGeometry(const DrawingFrame* frame,
 166                         const gfx::Transform& draw_transform,
 167                         const gfx::RectF& quad_rect,
 168                         int matrix_location);
 169   void SetUseProgram(unsigned program);
 170
 171   void CopyTextureToFramebuffer(const DrawingFrame* frame,
 172                                 int texture_id,
 173                                 gfx::Rect rect,
 174                                 const gfx::Transform& draw_matrix,
 175                                 bool flip_vertically);
 176
 177   // Check if quad needs antialiasing and if so, inflate the quad and
 178   // fill edge array for fragment shader.  local_quad is set to
 179   // inflated quad if antialiasing is required, otherwise it is left
 180   // unchanged.  edge array is filled with inflated quad's edge data
 181   // if antialiasing is required, otherwise it is left unchanged.
 182   // Returns true if quad requires antialiasing and false otherwise.
 183   bool SetupQuadForAntialiasing(const gfx::Transform& device_transform,
 184                                 const DrawQuad* quad,
 185                                 gfx::QuadF* local_quad,
 186                                 float edge[24]) const;
 187
 188   bool UseScopedTexture(DrawingFrame* frame,
 189                         const ScopedResource* resource,
 190                         gfx::Rect viewport_rect);
 191
 192   bool MakeContextCurrent();
 193
 194   bool InitializeSharedObjects();
 195   void CleanupSharedObjects();
 196
 197   typedef base::Callback<void(scoped_ptr<CopyOutputRequest> copy_request,
 198                               bool success)>
 199       AsyncGetFramebufferPixelsCleanupCallback;
 200   void DoGetFramebufferPixels(
 201       uint8* pixels,
 202       gfx::Rect window_rect,
 203       const AsyncGetFramebufferPixelsCleanupCallback& cleanup_callback);
 204   void FinishedReadback(
 205       const AsyncGetFramebufferPixelsCleanupCallback& cleanup_callback,
 206       unsigned source_buffer,
 207       unsigned query,
 208       uint8_t* dest_pixels,
 209       gfx::Size size);
 210   void PassOnSkBitmap(scoped_ptr<SkBitmap> bitmap,
 211                       scoped_ptr<SkAutoLockPixels> lock,
 212                       scoped_ptr<CopyOutputRequest> request,
 213                       bool success);
 214
 215   static void DeleteTextureReleaseCallback(
 216       scoped_refptr<base::SingleThreadTaskRunner> task_runner,
 217       base::WeakPtr<GLRenderer> gl_renderer,
 218       unsigned texture_id,
 219       unsigned sync_point,
 220       bool lost_resource);
 221   void DeleteTextureReleaseCallbackOnImplThread(unsigned texture_id,
 222                                                 unsigned sync_point,
 223                                                 bool lost_resource);
 224
 225   void ReinitializeGrCanvas();
 226   void ReinitializeGLState();
 227
 228   virtual void DiscardBackbuffer() OVERRIDE;
 229   virtual void EnsureBackbuffer() OVERRIDE;
 230   void EnforceMemoryPolicy();
 231
 232   RendererCapabilities capabilities_;
 233
 234   unsigned offscreen_framebuffer_id_;
 235
 236   scoped_ptr<GeometryBinding> shared_geometry_;
 237   gfx::QuadF shared_geometry_quad_;
 238
 239   // This block of bindings defines all of the programs used by the compositor
 240   // itself.  Add any new programs here to GLRendererShaderTest.
 241
 242   // Tiled layer shaders.
 243   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexAlpha>
 244       TileProgram;
 245   typedef ProgramBinding<VertexShaderTileAA, FragmentShaderRGBATexClampAlphaAA>
 246       TileProgramAA;
 247   typedef ProgramBinding<VertexShaderTileAA,
 248                          FragmentShaderRGBATexClampSwizzleAlphaAA>
 249       TileProgramSwizzleAA;
 250   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexOpaque>
 251       TileProgramOpaque;
 252   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexSwizzleAlpha>
 253       TileProgramSwizzle;
 254   typedef ProgramBinding<VertexShaderTile, FragmentShaderRGBATexSwizzleOpaque>
 255       TileProgramSwizzleOpaque;
 256   typedef ProgramBinding<VertexShaderPosTex, FragmentShaderCheckerboard>
 257       TileCheckerboardProgram;
 258
 259   // Texture shaders.
 260   typedef ProgramBinding<VertexShaderPosTexTransform,
 261                          FragmentShaderRGBATexVaryingAlpha> TextureProgram;
 262   typedef ProgramBinding<VertexShaderPosTexTransform,
 263                          FragmentShaderRGBATexPremultiplyAlpha>
 264       NonPremultipliedTextureProgram;
 265   typedef ProgramBinding<VertexShaderPosTexTransform,
 266                          FragmentShaderTexBackgroundVaryingAlpha>
 267       TextureBackgroundProgram;
 268   typedef ProgramBinding<VertexShaderPosTexTransform,
 269                          FragmentShaderTexBackgroundPremultiplyAlpha>
 270       NonPremultipliedTextureBackgroundProgram;
 271   typedef ProgramBinding<VertexShaderPosTexTransform,
 272                          FragmentShaderRGBATexRectVaryingAlpha>
 273       TextureIOSurfaceProgram;
 274
 275   // Render surface shaders.
 276   typedef ProgramBinding<VertexShaderPosTexTransform,
 277                          FragmentShaderRGBATexAlpha> RenderPassProgram;
 278   typedef ProgramBinding<VertexShaderPosTexTransform,
 279                          FragmentShaderRGBATexAlphaMask> RenderPassMaskProgram;
 280   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 281                          FragmentShaderRGBATexAlphaAA> RenderPassProgramAA;
 282   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 283                          FragmentShaderRGBATexAlphaMaskAA>
 284       RenderPassMaskProgramAA;
 285   typedef ProgramBinding<VertexShaderPosTexTransform,
 286                          FragmentShaderRGBATexColorMatrixAlpha>
 287       RenderPassColorMatrixProgram;
 288   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 289                          FragmentShaderRGBATexAlphaMaskColorMatrixAA>
 290       RenderPassMaskColorMatrixProgramAA;
 291   typedef ProgramBinding<VertexShaderQuadTexTransformAA,
 292                          FragmentShaderRGBATexAlphaColorMatrixAA>
 293       RenderPassColorMatrixProgramAA;
 294   typedef ProgramBinding<VertexShaderPosTexTransform,
 295                          FragmentShaderRGBATexAlphaMaskColorMatrix>
 296       RenderPassMaskColorMatrixProgram;
 297
 298   // Video shaders.
 299   typedef ProgramBinding<VertexShaderVideoTransform,
 300                          FragmentShaderOESImageExternal>
 301       VideoStreamTextureProgram;
 302   typedef ProgramBinding<VertexShaderPosTexYUVStretch, FragmentShaderYUVVideo>
 303       VideoYUVProgram;
 304   typedef ProgramBinding<VertexShaderPosTexYUVStretch, FragmentShaderYUVAVideo>
 305       VideoYUVAProgram;
 306
 307   // Special purpose / effects shaders.
 308   typedef ProgramBinding<VertexShaderPos, FragmentShaderColor>
 309       DebugBorderProgram;
 310   typedef ProgramBinding<VertexShaderQuad, FragmentShaderColor>
 311       SolidColorProgram;
 312   typedef ProgramBinding<VertexShaderQuadAA, FragmentShaderColorAA>
 313       SolidColorProgramAA;
 314
 315   const TileProgram* GetTileProgram(TexCoordPrecision precision);
 316   const TileProgramOpaque* GetTileProgramOpaque(TexCoordPrecision precision);
 317   const TileProgramAA* GetTileProgramAA(TexCoordPrecision precision);
 318   const TileProgramSwizzle* GetTileProgramSwizzle(TexCoordPrecision precision);
 319   const TileProgramSwizzleOpaque* GetTileProgramSwizzleOpaque(
 320       TexCoordPrecision precision);
 321   const TileProgramSwizzleAA* GetTileProgramSwizzleAA(
 322       TexCoordPrecision precision);
 323   const TileCheckerboardProgram* GetTileCheckerboardProgram();
 324
 325   const RenderPassProgram* GetRenderPassProgram(
 326       TexCoordPrecision precision);
 327   const RenderPassProgramAA* GetRenderPassProgramAA(
 328       TexCoordPrecision precision);
 329   const RenderPassMaskProgram* GetRenderPassMaskProgram(
 330       TexCoordPrecision precision);
 331   const RenderPassMaskProgramAA* GetRenderPassMaskProgramAA(
 332       TexCoordPrecision precision);
 333   const RenderPassColorMatrixProgram* GetRenderPassColorMatrixProgram(
 334       TexCoordPrecision precision);
 335   const RenderPassColorMatrixProgramAA* GetRenderPassColorMatrixProgramAA(
 336       TexCoordPrecision precision);
 337   const RenderPassMaskColorMatrixProgram* GetRenderPassMaskColorMatrixProgram(
 338       TexCoordPrecision precision);
 339   const RenderPassMaskColorMatrixProgramAA*
 340       GetRenderPassMaskColorMatrixProgramAA(TexCoordPrecision precision);
 341
 342   const TextureProgram* GetTextureProgram(
 343       TexCoordPrecision precision);
 344   const NonPremultipliedTextureProgram* GetNonPremultipliedTextureProgram(
 345       TexCoordPrecision precision);
 346   const TextureBackgroundProgram* GetTextureBackgroundProgram(
 347       TexCoordPrecision precision);
 348   const NonPremultipliedTextureBackgroundProgram*
 349       GetNonPremultipliedTextureBackgroundProgram(TexCoordPrecision precision);
 350   const TextureIOSurfaceProgram* GetTextureIOSurfaceProgram(
 351       TexCoordPrecision precision);
 352
 353   const VideoYUVProgram* GetVideoYUVProgram(
 354       TexCoordPrecision precision);
 355   const VideoYUVAProgram* GetVideoYUVAProgram(
 356       TexCoordPrecision precision);
 357   const VideoStreamTextureProgram* GetVideoStreamTextureProgram(
 358       TexCoordPrecision precision);
 359
 360   const DebugBorderProgram* GetDebugBorderProgram();
 361   const SolidColorProgram* GetSolidColorProgram();
 362   const SolidColorProgramAA* GetSolidColorProgramAA();
 363
 364   scoped_ptr<TileProgram> tile_program_;
 365   scoped_ptr<TileProgramOpaque> tile_program_opaque_;
 366   scoped_ptr<TileProgramAA> tile_program_aa_;
 367   scoped_ptr<TileProgramSwizzle> tile_program_swizzle_;
 368   scoped_ptr<TileProgramSwizzleOpaque> tile_program_swizzle_opaque_;
 369   scoped_ptr<TileProgramSwizzleAA> tile_program_swizzle_aa_;
 370   scoped_ptr<TileCheckerboardProgram> tile_checkerboard_program_;
 371
 372   scoped_ptr<TileProgram> tile_program_highp_;
 373   scoped_ptr<TileProgramOpaque> tile_program_opaque_highp_;
 374   scoped_ptr<TileProgramAA> tile_program_aa_highp_;
 375   scoped_ptr<TileProgramSwizzle> tile_program_swizzle_highp_;
 376   scoped_ptr<TileProgramSwizzleOpaque> tile_program_swizzle_opaque_highp_;
 377   scoped_ptr<TileProgramSwizzleAA> tile_program_swizzle_aa_highp_;
 378
 379   scoped_ptr<TextureProgram> texture_program_;
 380   scoped_ptr<NonPremultipliedTextureProgram> nonpremultiplied_texture_program_;
 381   scoped_ptr<TextureBackgroundProgram> texture_background_program_;
 382   scoped_ptr<NonPremultipliedTextureBackgroundProgram>
 383       nonpremultiplied_texture_background_program_;
 384   scoped_ptr<TextureIOSurfaceProgram> texture_io_surface_program_;
 385
 386   scoped_ptr<TextureProgram> texture_program_highp_;
 387   scoped_ptr<NonPremultipliedTextureProgram>
 388       nonpremultiplied_texture_program_highp_;
 389   scoped_ptr<TextureBackgroundProgram> texture_background_program_highp_;
 390   scoped_ptr<NonPremultipliedTextureBackgroundProgram>
 391       nonpremultiplied_texture_background_program_highp_;
 392   scoped_ptr<TextureIOSurfaceProgram> texture_io_surface_program_highp_;
 393
 394   scoped_ptr<RenderPassProgram> render_pass_program_;
 395   scoped_ptr<RenderPassProgramAA> render_pass_program_aa_;
 396   scoped_ptr<RenderPassMaskProgram> render_pass_mask_program_;
 397   scoped_ptr<RenderPassMaskProgramAA> render_pass_mask_program_aa_;
 398   scoped_ptr<RenderPassColorMatrixProgram> render_pass_color_matrix_program_;
 399   scoped_ptr<RenderPassColorMatrixProgramAA>
 400       render_pass_color_matrix_program_aa_;
 401   scoped_ptr<RenderPassMaskColorMatrixProgram>
 402       render_pass_mask_color_matrix_program_;
 403   scoped_ptr<RenderPassMaskColorMatrixProgramAA>
 404       render_pass_mask_color_matrix_program_aa_;
 405
 406   scoped_ptr<RenderPassProgram> render_pass_program_highp_;
 407   scoped_ptr<RenderPassProgramAA> render_pass_program_aa_highp_;
 408   scoped_ptr<RenderPassMaskProgram> render_pass_mask_program_highp_;
 409   scoped_ptr<RenderPassMaskProgramAA> render_pass_mask_program_aa_highp_;
 410   scoped_ptr<RenderPassColorMatrixProgram>
 411       render_pass_color_matrix_program_highp_;
 412   scoped_ptr<RenderPassColorMatrixProgramAA>
 413       render_pass_color_matrix_program_aa_highp_;
 414   scoped_ptr<RenderPassMaskColorMatrixProgram>
 415       render_pass_mask_color_matrix_program_highp_;
 416   scoped_ptr<RenderPassMaskColorMatrixProgramAA>
 417       render_pass_mask_color_matrix_program_aa_highp_;
 418
 419   scoped_ptr<VideoYUVProgram> video_yuv_program_;
 420   scoped_ptr<VideoYUVAProgram> video_yuva_program_;
 421   scoped_ptr<VideoStreamTextureProgram> video_stream_texture_program_;
 422
 423   scoped_ptr<VideoYUVProgram> video_yuv_program_highp_;
 424   scoped_ptr<VideoYUVAProgram> video_yuva_program_highp_;
 425   scoped_ptr<VideoStreamTextureProgram> video_stream_texture_program_highp_;
 426
 427   scoped_ptr<DebugBorderProgram> debug_border_program_;
 428   scoped_ptr<SolidColorProgram> solid_color_program_;
 429   scoped_ptr<SolidColorProgramAA> solid_color_program_aa_;
 430
 431   WebKit::WebGraphicsContext3D* context_;
 432
 433   skia::RefPtr<GrContext> gr_context_;
 434   skia::RefPtr<SkCanvas> sk_canvas_;
 435
 436   gfx::Rect swap_buffer_rect_;
 437   gfx::Rect scissor_rect_;
 438   gfx::Rect viewport_;
 439   bool is_backbuffer_discarded_;
 440   bool discard_backbuffer_when_not_visible_;
 441   bool is_using_bind_uniform_;
 442   bool visible_;
 443   bool is_scissor_enabled_;
 444   bool stencil_shadow_;
 445   bool blend_shadow_;
 446   unsigned program_shadow_;
 447   TexturedQuadDrawCache draw_cache_;
 448   int highp_threshold_min_;
 449   int highp_threshold_cache_;
 450   bool offscreen_context_labelled_;
 451
 452   struct PendingAsyncReadPixels;
 453   ScopedPtrVector<PendingAsyncReadPixels> pending_async_read_pixels_;
 454
 455   scoped_ptr<ResourceProvider::ScopedWriteLockGL> current_framebuffer_lock_;
 456
 457   scoped_refptr<ResourceProvider::Fence> last_swap_fence_;
 458
 459   SkBitmap on_demand_tile_raster_bitmap_;
 460   ResourceProvider::ResourceId on_demand_tile_raster_resource_id_;
 461
 462   base::WeakPtrFactory<GLRenderer> weak_factory_;
 463
 464   DISALLOW_COPY_AND_ASSIGN(GLRenderer);
 465 };
 466
 467 // Setting DEBUG_GL_CALLS to 1 will call glGetError() after almost every GL
 468 // call made by the compositor. Useful for debugging rendering issues but
 469 // will significantly degrade performance.
 470 #define DEBUG_GL_CALLS 0
 471
 472 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 473 #define GLC(context, x)                                                        \
 474   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 475 #else
 476 #define GLC(context, x) (x)
 477 #endif
 478
 479 }  // namespace cc
 480
 481 #endif  // CC_OUTPUT_GL_RENDERER_H_