kc3-lang/angle/src/libANGLE/renderer/gl/egl/ozone/DisplayOzone.h

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• Hash : 7d670a33
  Author :
  Date : 2017-02-21T21:35:57
  

  Make ozone backend work if it can't display.
  
  The ozone backend will no longer fail if it is unable to display on
  screen for any reason.  It no longer assumes it can control the first
  screen it finds.
  
  BUG=angleproject:1423
  
  Change-Id: I5d5274c54b1bc6de50e704903391bf6161efa487
  Reviewed-on: https://chromium-review.googlesource.com/445805
  Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/gl/egl/ozone/DisplayOzone.h

• //
  // Copyright (c) 2016 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // DisplayOzone.h: Ozone implementation of egl::Display
  
  #ifndef LIBANGLE_RENDERER_GL_EGL_OZONE_DISPLAYOZONE_H_
  #define LIBANGLE_RENDERER_GL_EGL_OZONE_DISPLAYOZONE_H_
  
  #include <xf86drm.h>
  #include <xf86drmMode.h>
  
  #include <string>
  
  #include "libANGLE/renderer/gl/egl/DisplayEGL.h"
  
  struct gbm_device;
  struct gbm_bo;
  
  namespace gl
  {
  class FramebufferState;
  }
  
  namespace rx
  {
  
  class FramebufferGL;
  
  // TODO(fjhenigman) Implement swap control.  The following struct will be used for that.
  // State-tracking data for the swap control to allow DisplayOzone to remember per
  // drawable information for swap control.
  struct SwapControlData final
  {
      SwapControlData();
  
      // Set by the drawable
      int targetSwapInterval;
  
      // DisplayOzone-side state-tracking
      int maxSwapInterval;
      int currentSwapInterval;
  };
  
  class DisplayOzone final : public DisplayEGL
  {
    public:
      struct NativeWindow
      {
          int32_t x;
          int32_t y;
          int32_t width;
          int32_t height;
          int32_t borderWidth;
          int32_t borderHeight;
          int32_t visible;
          int32_t depth;
      };
  
      class Buffer final : angle::NonCopyable
      {
        public:
          Buffer(DisplayOzone *display,
                 uint32_t useFlags,
                 uint32_t gbmFormat,
                 uint32_t drmFormat,
                 uint32_t drmFormatFB,
                 int depthBits,
                 int stencilBits);
  
          ~Buffer();
          bool initialize(const NativeWindow *window);
          bool initialize(int32_t width, int32_t height);
          void reset();
          bool resize(int32_t width, int32_t height);
          FramebufferGL *framebufferGL(const gl::FramebufferState &state);
          void present();
          uint32_t getDRMFB();
          void bindTexImage();
          GLuint getTexture();
          int32_t getWidth() const { return mWidth; }
          int32_t getHeight() const { return mHeight; }
          GLuint getGLFB() const { return mGLFB; }
          const NativeWindow *getNative() const { return mNative; }
  
        private:
          DisplayOzone *mDisplay;
          const NativeWindow *mNative;
          int mWidth;
          int mHeight;
          const int mDepthBits;
          const int mStencilBits;
          const uint32_t mUseFlags;
          const uint32_t mGBMFormat;
          const uint32_t mDRMFormat;
          const uint32_t mDRMFormatFB;
          gbm_bo *mBO;
          int mDMABuf;
          bool mHasDRMFB;
          uint32_t mDRMFB;
          EGLImageKHR mImage;
          GLuint mColorBuffer;
          GLuint mDSBuffer;
          GLuint mGLFB;
          GLuint mTexture;
      };
  
      DisplayOzone(const egl::DisplayState &state);
      ~DisplayOzone() override;
  
      egl::Error initialize(egl::Display *display) override;
      void terminate() override;
  
      SurfaceImpl *createWindowSurface(const egl::SurfaceState &state,
                                       EGLNativeWindowType window,
                                       const egl::AttributeMap &attribs) override;
      SurfaceImpl *createPbufferSurface(const egl::SurfaceState &state,
                                        const egl::AttributeMap &attribs) override;
      SurfaceImpl *createPbufferFromClientBuffer(const egl::SurfaceState &state,
                                                 EGLenum buftype,
                                                 EGLClientBuffer clientBuffer,
                                                 const egl::AttributeMap &attribs) override;
      SurfaceImpl *createPixmapSurface(const egl::SurfaceState &state,
                                       NativePixmapType nativePixmap,
                                       const egl::AttributeMap &attribs) override;
  
      egl::ConfigSet generateConfigs() override;
  
      bool testDeviceLost() override;
      egl::Error restoreLostDevice() override;
  
      bool isValidNativeWindow(EGLNativeWindowType window) const override;
  
      egl::Error getDevice(DeviceImpl **device) override;
  
      egl::Error waitClient() const override;
      egl::Error waitNative(EGLint engine,
                            egl::Surface *drawSurface,
                            egl::Surface *readSurface) const override;
  
      // TODO(fjhenigman) Implement this.
      // Swap interval can be set globally or per drawable.
      // This function will make sure the drawable's swap interval is the
      // one required so that the subsequent swapBuffers acts as expected.
      void setSwapInterval(EGLSurface drawable, SwapControlData *data);
  
    private:
      GLuint makeShader(GLuint type, const char *src);
      void drawBuffer(Buffer *buffer);
      void drawWithBlit(Buffer *buffer);
      void drawWithTexture(Buffer *buffer);
      void flushGL();
      bool hasUsableScreen(int fd);
      void presentScreen();
      static void pageFlipHandler(int fd,
                                  unsigned int sequence,
                                  unsigned int tv_sec,
                                  unsigned int tv_usec,
                                  void *data);
      void pageFlipHandler(unsigned int sequence, uint64_t tv);
  
      // TODO(fjhenigman) Implement swap control.  The following stuff will be used for that.
      enum class SwapControl
      {
          ABSENT,
          EXT,
          MESA,
          SGI,
      };
      SwapControl mSwapControl;
      int mMinSwapInterval;
      int mMaxSwapInterval;
      int mCurrentSwapInterval;
  
      gbm_device *mGBM;
      drmModeConnectorPtr mConnector;
      drmModeModeInfoPtr mMode;
      drmModeCrtcPtr mCRTC;
      bool mSetCRTC;
  
      int32_t mWidth;
      int32_t mHeight;
  
      // Three scanout buffers cycle through four states.  The state of a buffer
      // is indicated by which of these pointers points to it.
      // TODO(fjhenigman) It might be simpler/clearer to use a ring buffer.
      Buffer *mScanning;
      Buffer *mPending;
      Buffer *mDrawing;
      Buffer *mUnused;
  
      GLuint mProgram;
      GLuint mVertexShader;
      GLuint mFragmentShader;
      GLuint mVertexBuffer;
      GLuint mIndexBuffer;
      GLint mCenterUniform;
      GLint mWindowSizeUniform;
      GLint mBorderSizeUniform;
      GLint mDepthUniform;
  };
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_GL_EGL_OZONE_DISPLAYOZONE_H_
  

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