1 /*

     2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:   

    15 *

    16 */

    17 

    18 

    19 

    20 #include "HuiFxVg10OnscreenRenderbuffer.h"

    21 #include "HuiVg10RenderSurface.h"

    22 #include "HuiVg10RenderPlugin.h"

    23 

    24 CHuiFxVg10OnscreenRenderbuffer* CHuiFxVg10OnscreenRenderbuffer::NewL(CHuiVg10RenderPlugin& aPlugin, CHuiVg10RenderSurface& aSurface)

    25     {

    26     CHuiFxVg10OnscreenRenderbuffer* e = new (ELeave) CHuiFxVg10OnscreenRenderbuffer();

    27     CleanupStack::PushL(e);

    28     e->ConstructL(aPlugin, aSurface);

    29     CleanupStack::Pop(e);

    30     return e;

    31     }

    32 

    33 void CHuiFxVg10OnscreenRenderbuffer::ConstructL(CHuiVg10RenderPlugin& aPlugin, CHuiVg10RenderSurface& aSurface)

    34     {

    35     CHuiFxRenderbuffer::ConstructL(aSurface.Size(), EBufferTypeOnscreen);

    36     iPlugin = &aPlugin;

    37     iSurface = &aSurface;

    38     iTextureUsage = ERenderbufferUsageReadWrite;

    39     

    40 #ifndef __WINS__ // Should possibly query the supported mode instead?

    41     VGImageFormat imageInternalFormat = VG_sARGB_8888_PRE;

    42 #else

    43     VGImageFormat imageInternalFormat = VG_sARGB_8888;

    44 #endif

    45     

    46     iImage = vgCreateImage(imageInternalFormat, Size().iWidth, Size().iHeight, VG_IMAGE_QUALITY_NONANTIALIASED);

    47     HUIFX_VG_INVARIANT();

    48     

    49     // Initialize the context

    50     iGc = iPlugin->CreateGcL();

    51     BindAsRenderTarget();

    52     iGc->InitState();

    53     UnbindAsRenderTarget();

    54     

    55     // Let renderer know that we have been fiddlling with OpenVg state directly

    56     // "iGc->InitState" confuses scissoring setting, so lets notify it.

    57     CHuiVg10RenderPlugin& renderer = CHuiStatic::Vg10Renderer();

    58     renderer.AddRestoreStateFlags(EHuiVg10GcStateFlagDirtyScissor);    

    59     renderer.AddRestoreStateFlags(EHuiVg10GcStateFlagDirtyBlendMode);        

    60     }

    61 

    62 CHuiFxVg10OnscreenRenderbuffer::~CHuiFxVg10OnscreenRenderbuffer()

    63     {

    64     vgDestroyImage(iImage);

    65     HUIFX_VG_INVARIANT();

    66     

    67     delete iGc;

    68     }

    69 

    70 CHuiGc& CHuiFxVg10OnscreenRenderbuffer::BindAsRenderTarget()

    71     {

    72     // Save current context and surfaces

    73     iSavedContext = eglGetCurrentContext();

    74     iSavedDrawSurface = eglGetCurrentSurface(EGL_DRAW);

    75     iSavedReadSurface = eglGetCurrentSurface(EGL_READ);

    76 

    77     // Bind our own surface

    78     iSurface->MakeCurrent();

    79     

    80     return *iGc;

    81     }

    82 

    83 void CHuiFxVg10OnscreenRenderbuffer::BindAsTexture(THuiFxRenderbufferUsage aUsage)

    84     {

    85     // Copy the contents of the framebuffer into our backbuffer image

    86     // TODO: figure out a more efficient way of doing this

    87     iTextureUsage = aUsage;

    88     if (aUsage == ERenderbufferUsageReadWrite || aUsage == ERenderbufferUsageReadOnly)

    89         {

    90         BindAsRenderTarget();

    91         vgGetPixels(iImage, 0, 0, 0, 0, Size().iWidth, Size().iHeight);

    92         HUIFX_VG_INVARIANT();

    93         UnbindAsRenderTarget();

    94         }

    95     }

    96 

    97 void CHuiFxVg10OnscreenRenderbuffer::UnbindAsTexture()

    98     {

    99     // Copy the contents from our backbuffer image to the framebuffer

   100     if (iTextureUsage == ERenderbufferUsageReadWrite || iTextureUsage == ERenderbufferUsageWriteOnly)

   101         {

   102         BindAsRenderTarget();

   103         vgSetPixels(0, 0, iImage, 0, 0, Size().iWidth, Size().iHeight);

   104         HUIFX_VG_INVARIANT();

   105         UnbindAsRenderTarget();

   106         }

   107     }

   108 

   109 void CHuiFxVg10OnscreenRenderbuffer::UnbindAsRenderTarget()

   110     {

   111     // Restore original surface & context

   112     eglMakeCurrent(iPlugin->EglDisplay(), iSavedDrawSurface, iSavedReadSurface,

   113                    iSavedContext);

   114     }

   115 

   116 VGImage CHuiFxVg10OnscreenRenderbuffer::Image() const

   117     {

   118     return iImage;

   119     }

   120 

   121 void CHuiFxVg10OnscreenRenderbuffer::PrepareForReuse(const TSize& /* aReusedRect */)

   122     {

   123     // this should never happen.

   124     ASSERT(FALSE);

   125     }