irrlicht/source/Irrlicht/CEAGLManager.mm

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// Copyright (C) 2015 Patryk Nadrowski
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in Irrlicht.h
#include "CEAGLManager.h"
#ifdef _IRR_COMPILE_WITH_EAGL_MANAGER_
#include "irrString.h"
#include "os.h"
#import <UIKit/UIKit.h>
#import <OpenGLES/EAGL.h>
#if defined(_IRR_COMPILE_WITH_OGLES1_)
#include <OpenGLES/ES1/gl.h>
#include <OpenGLES/ES1/glext.h>
#elif defined(_IRR_COMPILE_WITH_OGLES2_)
#include <OpenGLES/ES2/gl.h>
#include <OpenGLES/ES2/glext.h>
#endif
namespace irr
{
namespace video
{
struct SEAGLManagerDataStorage
{
SEAGLManagerDataStorage() : Layer(0), Context(0)
{
}
CAEAGLLayer* Layer;
EAGLContext* Context;
};
CEAGLManager::CEAGLManager() : IContextManager(), Configured(false), DataStorage(0)
{
#ifdef _DEBUG
setDebugName("CEAGLManager");
#endif
DataStorage = new SEAGLManagerDataStorage();
}
CEAGLManager::~CEAGLManager()
{
destroyContext();
destroySurface();
terminate();
delete static_cast<SEAGLManagerDataStorage*>(DataStorage);
}
bool CEAGLManager::initialize(const SIrrlichtCreationParameters& params, const SExposedVideoData& data)
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
if (dataStorage->Layer != nil)
return true;
Params = params;
Data = data;
UIView* view = (__bridge UIView*)data.OpenGLiOS.View;
if (view == nil || ![[view layer] isKindOfClass:[CAEAGLLayer class]])
{
os::Printer::log("Could not get EAGL display.");
return false;
}
dataStorage->Layer = (CAEAGLLayer*)[view layer];
return true;
}
void CEAGLManager::terminate()
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
[EAGLContext setCurrentContext:0];
destroySurface();
if (dataStorage->Layer != nil)
dataStorage->Layer = 0;
}
bool CEAGLManager::generateSurface()
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
CAEAGLLayer* layer = dataStorage->Layer;
if (layer == nil)
return false;
if (Configured)
return true;
NSDictionary* attribs = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:NO],
kEAGLDrawablePropertyRetainedBacking,
(Params.Bits > 16) ? kEAGLColorFormatRGBA8 : kEAGLColorFormatRGB565,
kEAGLDrawablePropertyColorFormat,
nil];
[layer setOpaque:(Params.WithAlphaChannel) ? YES : NO];
[layer setDrawableProperties:attribs];
Configured = true;
return true;
}
void CEAGLManager::destroySurface()
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
CAEAGLLayer* layer = dataStorage->Layer;
if (layer == nil)
return;
[layer setOpaque:NO];
[layer setDrawableProperties:nil];
Configured = false;
}
bool CEAGLManager::generateContext()
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
if (dataStorage->Context != nil || !Configured)
return false;
EAGLRenderingAPI OpenGLESVersion = kEAGLRenderingAPIOpenGLES2;
switch (Params.DriverType)
{
case EDT_OGLES1:
OpenGLESVersion = kEAGLRenderingAPIOpenGLES1;
break;
case EDT_OGLES2:
OpenGLESVersion = kEAGLRenderingAPIOpenGLES2;
break;
default:
break;
}
dataStorage->Context = [[EAGLContext alloc] initWithAPI:OpenGLESVersion];
if (dataStorage->Context == nil)
{
os::Printer::log("Could not create EAGL context.", ELL_ERROR);
return false;
}
Data.OpenGLiOS.Context = (__bridge void*)dataStorage->Context;
os::Printer::log("EAGL context created with OpenGLESVersion: ", core::stringc(static_cast<int>(OpenGLESVersion)), ELL_DEBUG);
return true;
}
void CEAGLManager::destroyContext()
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
[dataStorage->Context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:nil];
if (FrameBuffer.BufferID != 0)
{
glDeleteFramebuffersOES(1, &FrameBuffer.BufferID);
FrameBuffer.BufferID = 0;
}
if (FrameBuffer.ColorBuffer != 0)
{
glDeleteRenderbuffersOES(1, &FrameBuffer.ColorBuffer);
FrameBuffer.ColorBuffer = 0;
}
if (FrameBuffer.DepthBuffer != 0)
{
glDeleteRenderbuffersOES(1, &FrameBuffer.DepthBuffer);
FrameBuffer.DepthBuffer = 0;
}
[EAGLContext setCurrentContext:0];
if (dataStorage->Context != nil)
dataStorage->Context = 0;
Data.OpenGLiOS.Context = 0;
}
bool CEAGLManager::activateContext(const SExposedVideoData& videoData)
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
EAGLContext* context = dataStorage->Context;
bool status = false;
if (context != nil)
{
status = ([EAGLContext currentContext] == context || [EAGLContext setCurrentContext:context]);
}
if (status)
{
if (FrameBuffer.ColorBuffer == 0)
{
glGenRenderbuffersOES(1, &FrameBuffer.ColorBuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, FrameBuffer.ColorBuffer);
[context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:dataStorage->Layer];
}
if (FrameBuffer.DepthBuffer == 0)
{
GLenum depth = (Params.ZBufferBits >= 24) ? GL_DEPTH_COMPONENT24_OES : GL_DEPTH_COMPONENT16_OES;
glGenRenderbuffersOES(1, &FrameBuffer.DepthBuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, FrameBuffer.DepthBuffer);
glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depth, Params.WindowSize.Width, Params.WindowSize.Height);
}
if (FrameBuffer.BufferID == 0)
{
glGenFramebuffersOES(1, &FrameBuffer.BufferID);
glBindFramebufferOES(GL_FRAMEBUFFER_OES, FrameBuffer.BufferID);
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, FrameBuffer.ColorBuffer);
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, FrameBuffer.DepthBuffer);
}
glBindFramebufferOES(GL_FRAMEBUFFER_OES, FrameBuffer.BufferID);
}
else
{
os::Printer::log("Could not make EGL context current.");
}
return status;
}
const SExposedVideoData& CEAGLManager::getContext() const
{
return Data;
}
bool CEAGLManager::swapBuffers()
{
SEAGLManagerDataStorage* dataStorage = static_cast<SEAGLManagerDataStorage*>(DataStorage);
EAGLContext* context = dataStorage->Context;
bool status = false;
if (context != nil && context == [EAGLContext currentContext])
{
glBindRenderbufferOES(GL_RENDERBUFFER_OES, FrameBuffer.ColorBuffer);
[context presentRenderbuffer:GL_RENDERBUFFER_OES];
status = true;
}
return status;
}
}
}
#endif