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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "EGLContext.h"
#include "GLContextAttribs.h"
#ifdef AVG_ENABLE_RPI
#include "BCMDisplay.h"
#else
#include "X11Display.h"
#endif
#include "../base/Exception.h"
#include "../base/StringHelper.h"
#include <SDL/SDL_syswm.h>
#include <EGL/egl.h>
#include <iostream>
namespace avg{
using namespace std;
EGLContext::EGLContext(const GLConfig& glConfig, const IntPoint& windowSize,
const SDL_SysWMinfo* pSDLWMInfo)
: GLContext(windowSize, pSDLWMInfo)
{
createEGLContext(glConfig, windowSize, pSDLWMInfo);
init(glConfig, true);
}
EGLContext::~EGLContext()
{
getVertexBufferCache().deleteBuffers();
getIndexBufferCache().deleteBuffers();
getPBOCache().deleteBuffers();
deleteObjects();
eglMakeCurrent(m_Display, EGL_NO_SURFACE, EGL_NO_SURFACE, 0);
eglDestroyContext(m_Display, m_Context);
eglDestroySurface(m_Display, m_Surface);
eglTerminate(m_Display);
}
void EGLContext::createEGLContext(const GLConfig& glConfig, const IntPoint& windowSize,
const SDL_SysWMinfo* pSDLWMInfo)
{
bool bOk;
#ifdef AVG_ENABLE_RPI
m_xDisplay = (EGLNativeDisplayType)getBCMDisplay(pSDLWMInfo);
m_Display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
#else
m_xDisplay = (EGLNativeDisplayType)getX11Display(pSDLWMInfo);
m_Display = eglGetDisplay(m_xDisplay);
#endif
checkEGLError(m_Display == EGL_NO_DISPLAY, "No EGL display available");
bOk = eglInitialize(m_Display, NULL, NULL);
checkEGLError(!bOk, "eglInitialize failed");
GLContextAttribs fbAttrs;
fbAttrs.append(EGL_RED_SIZE, 1);
fbAttrs.append(EGL_GREEN_SIZE, 1);
fbAttrs.append(EGL_BLUE_SIZE, 1);
fbAttrs.append(EGL_DEPTH_SIZE, 0);
fbAttrs.append(EGL_STENCIL_SIZE, 1);
int alphaSize = 0;
#ifdef AVG_ENABLE_RPI
if (!pSDLWMInfo) {
alphaSize = 1;
}
#endif
fbAttrs.append(EGL_ALPHA_SIZE, alphaSize);
fbAttrs.append(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
EGLint numFBConfig;
bOk = eglChooseConfig(m_Display, fbAttrs.get(), &m_Config, 1, &numFBConfig);
checkEGLError(!bOk, "Failed to choose EGL config");
EGLint vid;
bOk = eglGetConfigAttrib(m_Display, m_Config, EGL_NATIVE_VISUAL_ID, &vid);
AVG_ASSERT(bOk);
#ifndef AVG_ENABLE_RPI
XVisualInfo visTemplate;
visTemplate.visualid = vid;
int num_visuals;
XVisualInfo* pVisualInfo = XGetVisualInfo((_XDisplay*)m_xDisplay, VisualIDMask, &visTemplate,
&num_visuals);
AVG_ASSERT(pVisualInfo);
#endif
EGLNativeWindowType xWindow = 0;
if (pSDLWMInfo) {
#ifdef AVG_ENABLE_RPI
xWindow = createChildWindow(pSDLWMInfo, m_xDisplay, windowSize);
#else
Colormap colormap;
xWindow = (EGLNativeWindowType)createChildWindow(pSDLWMInfo, pVisualInfo, windowSize, colormap);
#endif
}
if (!eglBindAPI(EGL_OPENGL_ES_API)) {
cerr << "Failed to bind GLES API to EGL\n";
return;
}
if (numFBConfig != 1) {
cerr << "Didn't get exactly one config, but " << numFBConfig << endl;
return;
}
if (xWindow) {
m_Surface = eglCreateWindowSurface(m_Display, m_Config, xWindow, NULL);
} else {
#ifdef AVG_ENABLE_RPI
m_Surface = createBCMPixmapSurface(m_Display, m_Config);
#else
XVisualInfo visTemplate, *results;
visTemplate.screen = 0;
int numVisuals;
results = XGetVisualInfo((_XDisplay*)m_xDisplay, VisualScreenMask,
&visTemplate, & numVisuals);
Pixmap pmp = XCreatePixmap((_XDisplay*)m_xDisplay,
RootWindow((_XDisplay*)m_xDisplay, results[0].screen), 8, 8, results[0].depth);
m_Surface = eglCreatePixmapSurface(m_Display, m_Config, (EGLNativePixmapType)pmp, NULL);
#endif
}
AVG_ASSERT(m_Surface);
GLContextAttribs attrs;
attrs.append(EGL_CONTEXT_CLIENT_VERSION, 2);
m_Context = eglCreateContext(m_Display, m_Config, NULL, attrs.get());
checkEGLError(!m_Context, "Unable to create EGL context");
// dumpEGLConfig();
}
bool EGLContext::initVBlank(int rate)
{
return false;
}
void EGLContext::activate()
{
eglMakeCurrent(m_Display, m_Surface, m_Surface, m_Context);
setCurrent();
}
void EGLContext::swapBuffers()
{
eglSwapBuffers(m_Display, m_Surface);
}
void EGLContext::checkEGLError(bool bError, const std::string& sMsg)
{
if (bError) {
throw Exception(AVG_ERR_VIDEO_INIT_FAILED, sMsg + " (EGL error: " +
toString(eglGetError()) + ")");
}
}
void EGLContext::dumpEGLConfig() const
{
cout << "EGL configuration:" << endl;
dumpEGLConfigAttrib(EGL_RED_SIZE, "RED_SIZE");
dumpEGLConfigAttrib(EGL_GREEN_SIZE, "GREEN_SIZE");
dumpEGLConfigAttrib(EGL_BLUE_SIZE, "BLUE_SIZE");
dumpEGLConfigAttrib(EGL_ALPHA_SIZE, "ALPHA_SIZE");
dumpEGLConfigAttrib(EGL_BUFFER_SIZE, "BUFFER_SIZE");
dumpEGLConfigAttrib(EGL_DEPTH_SIZE, "DEPTH_SIZE");
dumpEGLConfigAttrib(EGL_STENCIL_SIZE, "STENCIL_SIZE");
}
void EGLContext::dumpEGLConfigAttrib(EGLint attrib, const string& name) const
{
EGLint value;
if (eglGetConfigAttrib(m_Display, m_Config, attrib, &value)) {
cout << " " << name << ": " << value << endl;
}
else {
cerr << " Failed to get EGL config attribute " << name << endl;
}
}
}
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