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/* Copyright 2015-2018 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "pch.h"
#import <QuartzCore/QuartzCore.h>
#import <OpenGLES/EAGL.h>
#import <OpenGLES/EAGLDrawable.h>
#include "DeviceContextGLImpl.hpp"
#include "RenderDeviceGLImpl.hpp"
#include "SwapChainGLIOS.hpp"
namespace Diligent
{
SwapChainGLIOS::SwapChainGLIOS(IReferenceCounters* pRefCounters,
const EngineGLCreateInfo& InitAttribs,
const SwapChainDesc& SCDesc,
RenderDeviceGLImpl* pRenderDeviceGL,
DeviceContextGLImpl* pImmediateContextGL) :
TSwapChainGLBase( pRefCounters, pRenderDeviceGL, pImmediateContextGL, SCDesc),
m_ColorRenderBuffer(false),
m_DepthRenderBuffer(false),
m_DefaultFBO(false)
{
if (m_DesiredPreTransform != SURFACE_TRANSFORM_OPTIMAL &&
m_DesiredPreTransform != SURFACE_TRANSFORM_IDENTITY)
{
LOG_WARNING_MESSAGE(GetSurfaceTransformString(m_DesiredPreTransform),
" is not an allowed pretransform because OpenGL swap chains only support identity transform. "
"Use SURFACE_TRANSFORM_OPTIMAL (recommended) or SURFACE_TRANSFORM_IDENTITY.");
}
m_DesiredPreTransform = SURFACE_TRANSFORM_OPTIMAL;
m_SwapChainDesc.PreTransform = SURFACE_TRANSFORM_IDENTITY;
m_CALayer = InitAttribs.Window.pCALayer;
InitRenderBuffers(true, m_SwapChainDesc.Width, m_SwapChainDesc.Height);
CreateDummyBuffers(m_pRenderDevice.RawPtr<RenderDeviceGLImpl>());
}
IMPLEMENT_QUERY_INTERFACE( SwapChainGLIOS, IID_SwapChainGL, TSwapChainBase )
void SwapChainGLIOS::Present(Uint32 SyncInterval)
{
EAGLContext* context = [EAGLContext currentContext];
glBindRenderbuffer(GL_RENDERBUFFER, m_ColorRenderBuffer);
[context presentRenderbuffer:GL_RENDERBUFFER];
//auto *pDeviceGL = ValidatedCast<RenderDeviceGLImpl>(m_pRenderDevice.RawPtr());
//pDeviceGL->m_GLContext.SwapBuffers();
}
void SwapChainGLIOS::InitRenderBuffers(bool InitFromDrawable, Uint32 &Width, Uint32 &Height)
{
EAGLContext* context = [EAGLContext currentContext];
m_DefaultFBO.Release();
m_DefaultFBO.Create();
glBindFramebuffer(GL_FRAMEBUFFER, m_DefaultFBO);
m_ColorRenderBuffer.Release();
m_ColorRenderBuffer.Create();
glBindRenderbuffer(GL_RENDERBUFFER, m_ColorRenderBuffer);
if(InitFromDrawable)
{
// This call associates the storage for the current render buffer with the
// EAGLDrawable (our CAEAGLLayer) allowing us to draw into a buffer that
// will later be rendered to the screen wherever the layer is (which
// corresponds with our view).
id<EAGLDrawable> drawable = (__bridge id<EAGLDrawable>)m_CALayer;
[context renderbufferStorage:GL_RENDERBUFFER fromDrawable:drawable];
}
else
{
CAEAGLLayer* layer = (__bridge CAEAGLLayer*)m_CALayer;
[context renderbufferStorage:GL_RENDERBUFFER fromDrawable:layer];
}
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_ColorRenderBuffer);
// Get the drawable buffer's width and height so we can create a depth buffer for the FBO
GLint backingWidth;
GLint backingHeight;
glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &backingWidth);
glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &backingHeight);
Width = backingWidth;
Height = backingHeight;
// Create a depth buffer to use with our drawable FBO
m_DepthRenderBuffer.Release();
m_DepthRenderBuffer.Create();
glBindRenderbuffer(GL_RENDERBUFFER, m_DepthRenderBuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, backingWidth, backingHeight);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_DepthRenderBuffer);
if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
{
LOG_ERROR_AND_THROW("Failed to make complete framebuffer object %x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
}
}
void SwapChainGLIOS::Resize( Uint32 NewWidth, Uint32 NewHeight, SURFACE_TRANSFORM NewTransform )
{
InitRenderBuffers(false, NewWidth, NewHeight);
TSwapChainGLBase::Resize(NewWidth, NewHeight, NewTransform, 0);
}
GLuint SwapChainGLIOS::GetDefaultFBO()const
{
return m_DefaultFBO;
}
void SwapChainGLIOS::SetFullscreenMode(const DisplayModeAttribs &DisplayMode)
{
UNSUPPORTED("Switching to fullscreen mode is not available on iOS");
}
void SwapChainGLIOS::SetWindowedMode()
{
UNSUPPORTED("Switching to windowed mode is not available on iOS");
}
}
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