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#include "UnityPrefix.h"
#include "ContextGLES20.h"
#include "IncludesGLES20.h"
#include "AssertGLES20.h"
#include "Runtime/Graphics/ScreenManager.h"
#if GFX_SUPPORTS_OPENGLES20
#if UNITY_WIN
struct EGLESData
{
void* dsp;
void* cfg;
void* cxt;
void* surf;
EGLESData():dsp(NULL),cfg(NULL),cxt(NULL),surf(NULL){}
};
static EGLESData sOpenGLESData;
bool InitializeGLES20 ()
{
HWND hwnd = GetScreenManager().GetWindow();
if (hwnd)
{
CreateContextGLES20 (hwnd);
return true;
}
ErrorString ("gles20: Can't initialize because HWND not set up");
return false;
}
void ShutdownGLES20 ()
{
DestroyContextGLES20();
}
bool IsContextGLES20Created()
{
return sOpenGLESData.surf != NULL &&
sOpenGLESData.cxt != NULL &&
sOpenGLESData.cfg != NULL &&
sOpenGLESData.dsp != NULL;
}
bool CreateContextGLES20(HWND hWnd)
{
//Just in case
DestroyContextGLES20();
EGLint numConfigs;
EGLint majorVersion;
EGLint minorVersion;
#if UNITY_WIN
/// Build up the attribute list
const EGLint configAttribs[] =
{
EGL_LEVEL, 0,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NATIVE_RENDERABLE, EGL_FALSE,
EGL_DEPTH_SIZE, 16,
EGL_NONE
};
// Get Display
sOpenGLESData.dsp = eglGetDisplay( hWnd?GetDC(hWnd):EGL_DEFAULT_DISPLAY );
if ( sOpenGLESData.dsp == EGL_NO_DISPLAY )
{
printf_console("GLES20: eglGetDisplay failed\n" );
return false;
}
//Hack : eglInitialize invokes WM_ACTIVATE message, and gAppActive is already true, so Unity will try to call some functions which requires some initialization,
// and this is not done yet
extern bool gAlreadyClosing;
bool last = gAlreadyClosing;
gAlreadyClosing = true;
// Initialize EGL
if ( ! eglInitialize( sOpenGLESData.dsp, &majorVersion, &minorVersion) )
{
printf_console("GLES20: eglInitialize failed\n");
return false;
}
// Choose config
if ( !eglChooseConfig(sOpenGLESData.dsp, configAttribs, &sOpenGLESData.cfg, 1, &numConfigs) )
{
printf_console("GLES20: eglChooseConfig failed\n");
return false;
}
// Create a surface
sOpenGLESData.surf = eglCreateWindowSurface( sOpenGLESData.dsp, sOpenGLESData.cfg, NativeWindowType( hWnd ), NULL );
if ( sOpenGLESData.surf == EGL_NO_SURFACE )
{
printf_console("GLES20: eglCreateWindowSurface failed\n");
return false;
}
// Create a GL context
EGLint ctxAttribList[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
sOpenGLESData.cxt = eglCreateContext( sOpenGLESData.dsp, sOpenGLESData.cfg, EGL_NO_CONTEXT, ctxAttribList );
if ( sOpenGLESData.cxt == EGL_NO_CONTEXT )
{
printf_console("GLES20: eglCreateContext failed\n");
return false;
}
// Make the context current
if ( ! eglMakeCurrent( sOpenGLESData.dsp, sOpenGLESData.surf, sOpenGLESData.surf, sOpenGLESData.cxt ) )
{
printf_console("GLES20: eglMakeCurrent failed\n");
return false;
}
gAlreadyClosing = last;
#endif
GLESAssert();
return true;
}
void DestroyContextGLES20()
{
if(sOpenGLESData.dsp)
{
eglMakeCurrent(sOpenGLESData.dsp, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT) ;
eglDestroyContext( sOpenGLESData.dsp, sOpenGLESData.cxt );
eglDestroySurface( sOpenGLESData.dsp, sOpenGLESData.surf );
eglTerminate( sOpenGLESData.dsp);
}
sOpenGLESData.surf = NULL;
sOpenGLESData.cxt = NULL;
sOpenGLESData.cfg = NULL;
sOpenGLESData.dsp = NULL;
}
void PresentContextGLES20()
{
eglSwapBuffers( sOpenGLESData.dsp, sOpenGLESData.surf );
}
#elif UNITY_LINUX
static EGLDisplay gEGLDisplay = EGL_NO_DISPLAY;
static EGLConfig gEGLConfig;
static EGLSurface gEGLSurface = EGL_NO_SURFACE;
static EGLContext gEGLContext = EGL_NO_CONTEXT;
void SetEGLDisplay(EGLDisplay display)
{
gEGLDisplay = display;
}
void SetEGLConfig(const EGLConfig &config)
{
gEGLConfig = config;
}
bool InitializeGLES20 ()
{
Window window = 0;
window = GetScreenManager().GetWindow();
if(window)
{
CreateContextGLES20(window);
return true;
}
return false;
}
void ShutdownGLES20 ()
{
DestroyContextGLES20();
}
bool IsContextGLES20Created()
{
return gEGLSurface != EGL_NO_SURFACE && gEGLContext != EGL_NO_CONTEXT;
}
bool CreateContextGLES20(Window window)
{
DestroyContextGLES20();
gEGLSurface = eglCreateWindowSurface(gEGLDisplay, gEGLConfig, window, NULL);
if(gEGLSurface == EGL_NO_SURFACE)
{
printf_console("eglCreateWindowSurface failed\n");
return false;
}
// Create a context
printf_console("Creating context\n");
EGLint ctxAttribList[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
gEGLContext = eglCreateContext(gEGLDisplay, gEGLConfig, EGL_NO_CONTEXT, ctxAttribList );
if ( gEGLContext == EGL_NO_CONTEXT )
{
printf_console( "eglCreateContext failed\n" );
return false;
}
if(!eglMakeCurrent(gEGLDisplay, gEGLSurface, gEGLSurface, gEGLContext))
{
printf_console("eglMakeCurrent failed\n");
}
return true;
}
void DestroyContextGLES20()
{
if(IsContextGLES20Created())
{
eglMakeCurrent(gEGLDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(gEGLDisplay, gEGLContext);
eglDestroySurface(gEGLDisplay, gEGLSurface);
}
gEGLSurface = EGL_NO_SURFACE;
gEGLContext = EGL_NO_CONTEXT;
}
void PresentContextGLES()
{
eglSwapBuffers(gEGLDisplay, gEGLSurface);
}
#endif // UNITY_WIN
#endif // GFX_SUPPORTS_OPENGLES20
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