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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 "BCMDisplay.h"
#include "../base/Exception.h"
#include <SDL/SDL.h>
#include <SDL/SDL_syswm.h>
#include <EGL/eglext_brcm.h>
#include <iostream>
using namespace std;
namespace avg {
IntPoint getX11WindowPosition(const SDL_SysWMinfo* pSDLWMInfo)
{
int x, y;
Window dummy;
XWindowAttributes wAttribs;
pSDLWMInfo->info.x11.lock_func();
XGetWindowAttributes(pSDLWMInfo->info.x11.display, pSDLWMInfo->info.x11.window,
&wAttribs);
XTranslateCoordinates(pSDLWMInfo->info.x11.display, pSDLWMInfo->info.x11.window,
wAttribs.root, 0, 0, &x, &y, &dummy);
pSDLWMInfo->info.x11.unlock_func();
return IntPoint(x, y);
}
DISPMANX_DISPLAY_HANDLE_T getBCMDisplay(const SDL_SysWMinfo* pSDLWMInfo)
{
bcm_host_init();
DISPMANX_DISPLAY_HANDLE_T display = vc_dispmanx_display_open(DISPMANX_ID_MAIN_LCD);
if (display == DISPMANX_NO_HANDLE) {
throw Exception(AVG_ERR_VIDEO_GENERAL, "No BCM display available.");
}
return display;
}
EGL_DISPMANX_WINDOW_T* createChildWindow(const SDL_SysWMinfo* pSDLWMInfo,
EGLNativeDisplayType bcmDisplay, const IntPoint& windowSize)
{
// Create a child (yet toplevel) window with the required attributes to render into.
IntPoint windowPos = getX11WindowPosition(pSDLWMInfo);
VC_RECT_T dstRect;
dstRect.x = windowPos.x;
dstRect.y = windowPos.y;
dstRect.width = windowSize.x;
dstRect.height = windowSize.y;
VC_RECT_T srcRect;
srcRect.x = 0;
srcRect.y = 0;
srcRect.width = windowSize.x << 16;
srcRect.height = windowSize.y << 16;
// start display update
DISPMANX_UPDATE_HANDLE_T update = vc_dispmanx_update_start(0);
if (update == DISPMANX_NO_HANDLE) {
throw Exception(AVG_ERR_VIDEO_GENERAL, "Failed to start BCM display update.");
}
// add element to display
DISPMANX_ELEMENT_HANDLE_T element = vc_dispmanx_element_add(update,
(DISPMANX_DISPLAY_HANDLE_T)bcmDisplay,
0 /* layer */, &dstRect, DISPMANX_NO_HANDLE /* src */, &srcRect,
(DISPMANX_PROTECTION_T) DISPMANX_PROTECTION_NONE,
0 /* alpha */, 0 /* clamp */, DISPMANX_NO_ROTATE);
if (element == DISPMANX_NO_HANDLE) {
throw Exception(AVG_ERR_VIDEO_GENERAL, "Failed to add element to BCM display.");
}
// finish display update
if (vc_dispmanx_update_submit_sync(update)) {
throw Exception(AVG_ERR_VIDEO_GENERAL, "Failed to finish BCM display update.");
}
EGL_DISPMANX_WINDOW_T* pWin = new EGL_DISPMANX_WINDOW_T; // XXX: destroy
pWin->element = element;
pWin->width = windowSize.x;
pWin->height = windowSize.y;
return pWin;
}
EGLSurface createBCMPixmapSurface(EGLDisplay display, EGLConfig config)
{
EGLint pixel_format = EGL_PIXEL_FORMAT_ARGB_8888_BRCM;
EGLint rt;
eglGetConfigAttrib(display, config, EGL_RENDERABLE_TYPE, &rt);
if (rt & EGL_OPENGL_ES_BIT) {
pixel_format |= EGL_PIXEL_FORMAT_RENDER_GLES_BRCM;
pixel_format |= EGL_PIXEL_FORMAT_GLES_TEXTURE_BRCM;
}
if (rt & EGL_OPENGL_ES2_BIT) {
pixel_format |= EGL_PIXEL_FORMAT_RENDER_GLES2_BRCM;
pixel_format |= EGL_PIXEL_FORMAT_GLES2_TEXTURE_BRCM;
}
if (rt & EGL_OPENVG_BIT) {
pixel_format |= EGL_PIXEL_FORMAT_RENDER_VG_BRCM;
pixel_format |= EGL_PIXEL_FORMAT_VG_IMAGE_BRCM;
}
if (rt & EGL_OPENGL_BIT) {
pixel_format |= EGL_PIXEL_FORMAT_RENDER_GL_BRCM;
}
EGLint pixmap[5];
pixmap[0] = 0;
pixmap[1] = 0;
pixmap[2] = 8;
pixmap[3] = 8;
pixmap[4] = pixel_format;
eglCreateGlobalImageBRCM(8, 8, pixel_format, 0, 8*4, pixmap);
EGLSurface surface = eglCreatePixmapSurface(display, config, pixmap, 0);
if ( surface == EGL_NO_SURFACE ) {
cerr << "Unable to create EGL surface (eglError: " << eglGetError() << ")" << endl;
}
return surface;
}
}
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