bool PlatformBlitToViewport( FPlatformOpenGLDevice* Device, const FOpenGLViewport& Viewport, uint32 BackbufferSizeX, uint32 BackbufferSizeY, bool bPresent,bool bLockToVsync, int32 SyncInterval )
{
if (Viewport.GetCustomPresent())
{
Viewport.GetCustomPresent()->Present(SyncInterval);
}
else
{
AndroidEGL::GetInstance()->SwapBuffers();
}
return true;
}
/**
* Main function for transferring data to on-screen buffers.
* On Windows it temporarily switches OpenGL context, on Mac only context's output view.
*/
bool PlatformBlitToViewport( FPlatformOpenGLDevice* Device, const FOpenGLViewport& Viewport, uint32 BackbufferSizeX, uint32 BackbufferSizeY, bool bPresent,bool bLockToVsync, int32 SyncInterval )
{
FPlatformOpenGLContext* const Context = Viewport.GetGLContext();
check(Context && Context->DeviceContext);
FScopeLock ScopeLock(Device->ContextUsageGuard);
{
FPlatformOpenGLContext TempContext = *Context;
if (Device->ViewportContexts.Num() == 1)
{
TempContext.OpenGLContext = Device->RenderingContext.OpenGLContext;
TempContext.ViewportFramebuffer = Device->RenderingContext.ViewportFramebuffer;
}
FScopeContext ScopeContext(&TempContext);
GLuint vfb = TempContext.ViewportFramebuffer;
if (Viewport.GetCustomPresent())
{
Device->TargetDirty = false;
glDisable(GL_FRAMEBUFFER_SRGB);
bool bShouldPresent = Viewport.GetCustomPresent()->Present(SyncInterval);
glEnable(GL_FRAMEBUFFER_SRGB);
if (!bShouldPresent)
{
return false;
}
else
{
Device->TargetDirty = true;
}
}
if (Device->ViewportContexts.Num() == 1 && Device->TargetDirty)
{
glBindFramebuffer(GL_FRAMEBUFFER, TempContext.ViewportFramebuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, Context->BackBufferTarget, Context->BackBufferResource, 0);
FOpenGL::CheckFrameBuffer();
Device->TargetDirty = false;
}
glDisable(GL_FRAMEBUFFER_SRGB);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
FOpenGL::DrawBuffer(GL_BACK);
glBindFramebuffer(GL_READ_FRAMEBUFFER, TempContext.ViewportFramebuffer);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glBlitFramebuffer(
0, 0, BackbufferSizeX, BackbufferSizeY,
0, BackbufferSizeY, BackbufferSizeX, 0,
GL_COLOR_BUFFER_BIT,
GL_NEAREST
);
glEnable(GL_FRAMEBUFFER_SRGB);
if (bPresent)
{
int32 RealSyncInterval = bLockToVsync ? SyncInterval : 0;
if (wglSwapIntervalEXT_ProcAddress && Context->SyncInterval != RealSyncInterval)
{
wglSwapIntervalEXT_ProcAddress(RealSyncInterval);
Context->SyncInterval = RealSyncInterval;
}
::SwapBuffers(Context->DeviceContext);
REPORT_GL_END_BUFFER_EVENT_FOR_FRAME_DUMP();
// INITIATE_GL_FRAME_DUMP_EVERY_X_CALLS( 1000 );
}
}
return true;
}