Surface.h

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Author : apatrick@chromium.org
Date : 2010-08-31 20:00:18
Hash : 0db0d6c8
Message : Replaces swap chain lazily when the swap interval is changed. It does not appear to be possible to pass a presentation interval to Present() or change it after creating the swap chain, short of calling Reset(). I decided to try fixing it by replacing the swap chain under the same conditions as a window resize. I tested it with a modified version of the simple vertex shader sample, passing various values to eglSwapInterval. My reading of the EGL spec might be wrong but I believe the interval state should be associated with the surface bound to the current context, rather than the display. Review URL: http://codereview.appspot.com/2036044 git-svn-id: https://angleproject.googlecode.com/svn/trunk@408 736b8ea6-26fd-11df-bfd4-992fa37f6226

src/libEGL/Surface.h

//
// Copyright (c) 2002-2010 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.
//

// Surface.h: Defines the egl::Surface class, representing a drawing surface
// such as the client area of a window, including any back buffers.
// Implements EGLSurface and related functionality. [EGL 1.4] section 2.2 page 3.

#ifndef INCLUDE_SURFACE_H_
#define INCLUDE_SURFACE_H_

#define EGLAPI
#include <EGL/egl.h>
#include <d3d9.h>

#include "common/angleutils.h"

namespace egl
{
class Display;
class Config;

class Surface
{
  public:
    Surface(Display *display, const egl::Config *config, HWND window);

    ~Surface();

    void release();
    void resetSwapChain();

    HWND getWindowHandle();
    bool swap();

    virtual EGLint getWidth() const;
    virtual EGLint getHeight() const;

    virtual IDirect3DSurface9 *getRenderTarget();
    virtual IDirect3DSurface9 *getDepthStencil();

    void setSwapInterval(EGLint interval);

  private:
    DISALLOW_COPY_AND_ASSIGN(Surface);

    Display *const mDisplay;
    IDirect3DSwapChain9 *mSwapChain;
    IDirect3DSurface9 *mBackBuffer;
    IDirect3DSurface9 *mRenderTarget;
    IDirect3DSurface9 *mDepthStencil;
    IDirect3DTexture9 *mFlipTexture;

    bool checkForOutOfDateSwapChain();

    static DWORD convertInterval(EGLint interval);

    void applyFlipState(IDirect3DDevice9 *device);
    void restoreState(IDirect3DDevice9 *device);
    void writeRecordableFlipState(IDirect3DDevice9 *device);
    void releaseRecordedState(IDirect3DDevice9 *device);
    IDirect3DStateBlock9 *mFlipState;
    IDirect3DStateBlock9 *mPreFlipState;
    IDirect3DSurface9 *mPreFlipBackBuffer;
    IDirect3DSurface9 *mPreFlipDepthStencil;

    const HWND mWindow;            // Window that the surface is created for.
    const egl::Config *mConfig;    // EGL config surface was created with
    EGLint mHeight;                // Height of surface
    EGLint mWidth;                 // Width of surface
//  EGLint horizontalResolution;   // Horizontal dot pitch
//  EGLint verticalResolution;     // Vertical dot pitch
//  EGLBoolean largestPBuffer;     // If true, create largest pbuffer possible
//  EGLBoolean mipmapTexture;      // True if texture has mipmaps
//  EGLint mipmapLevel;            // Mipmap level to render to
//  EGLenum multisampleResolve;    // Multisample resolve behavior
    EGLint mPixelAspectRatio;      // Display aspect ratio
    EGLenum mRenderBuffer;         // Render buffer
    EGLenum mSwapBehavior;         // Buffer swap behavior
//  EGLenum textureFormat;         // Format of texture: RGB, RGBA, or no texture
//  EGLenum textureTarget;         // Type of texture: 2D or no texture
//  EGLenum vgAlphaFormat;         // Alpha format for OpenVG
//  EGLenum vgColorSpace;          // Color space for OpenVG
    EGLint mSwapInterval;
    DWORD mPresentInterval;
    bool mPresentIntervalDirty;
};
}

#endif   // INCLUDE_SURFACE_H_

kc3-lang/angle/src/libEGL/Surface.h

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kc3-lang/angle /src/libEGL/Surface.h