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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qkmsbuffermanager.h"
#include "qkmsscreen.h"
#include "qkmscontext.h"
#include "qkmsdevice.h"
QT_BEGIN_NAMESPACE
QKmsBufferManager::QKmsBufferManager(QKmsScreen *screen) :
m_screen(screen),
m_frameBufferObject(0),
m_renderTarget(0),
m_displayCanidate(0),
m_currentDisplay(0)
{
}
QKmsBufferManager::~QKmsBufferManager()
{
clearBuffers();
glDeleteFramebuffers(1, &m_frameBufferObject);
}
void QKmsBufferManager::setupBuffersForMode(const drmModeModeInfo &mode, int numBuffers)
{
eglMakeCurrent(m_screen->device()->eglDisplay(), EGL_NO_SURFACE, EGL_NO_SURFACE, m_screen->device()->eglContext());
m_screen->bindFramebuffer();
if (m_frameBufferObject) {
clearBuffers();
} else {
//Setup Framebuffer Object
glGenFramebuffers(1, &m_frameBufferObject);
glBindFramebuffer(GL_FRAMEBUFFER, m_frameBufferObject);
}
//Setup shared Depth/Stencil buffer
glGenRenderbuffers(1, &m_depthAndStencilBufferObject);
glBindRenderbuffer(GL_RENDERBUFFER, m_depthAndStencilBufferObject);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_OES,
mode.hdisplay, mode.vdisplay);
//Setup "numBuffer" many rendering targets
for (int i = 0; i < numBuffers; i++) {
QKmsFramebuffer *buffer = new QKmsFramebuffer();
glGenRenderbuffers(1, &buffer->renderBuffer);
glBindRenderbuffer(GL_RENDERBUFFER, buffer->renderBuffer);
buffer->graphicsBufferObject = gbm_bo_create(m_screen->device()->gbmDevice(),
mode.hdisplay, mode.vdisplay,
GBM_BO_FORMAT_XRGB8888,
GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
buffer->eglImage = eglCreateImageKHR(m_screen->device()->eglDisplay(), 0, EGL_NATIVE_PIXMAP_KHR,
buffer->graphicsBufferObject, 0);
glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, buffer->eglImage);
quint32 stride = gbm_bo_get_pitch(buffer->graphicsBufferObject);
quint32 handle = gbm_bo_get_handle(buffer->graphicsBufferObject).u32;
int status = drmModeAddFB(m_screen->device()->fd(), mode.hdisplay, mode.vdisplay,
32, 32, stride, handle, &buffer->framebufferId);
//Todo: IF this returns true, then this is one less buffer that we use
//Not so fatal, but not handled at the moment.
if (status)
qFatal("failed to add framebuffer");
m_framebuffers.append(buffer);
}
//Attach the Depth and Stencil buffer
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER,
m_depthAndStencilBufferObject);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER,
m_depthAndStencilBufferObject);
//Attach renderbuffer as Color Attachment.
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
this->renderTargetBuffer());
}
void QKmsBufferManager::clearBuffers()
{
//Make sure that the FBO is binded
glBindFramebuffer(GL_FRAMEBUFFER, m_frameBufferObject);
//Detach the Color/Depth/Stencil Attachments.
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER,
0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER,
0);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
//Delete the shared Depth/Stencil buffer
glDeleteRenderbuffers(1, &m_depthAndStencilBufferObject);
//Delete each renderbuffer object
//Delete each EGLImage
//Remove each drm Framebuffer
foreach (QKmsFramebuffer *buffer, m_framebuffers) {
glDeleteRenderbuffers(1, &buffer->renderBuffer);
eglDestroyImageKHR(m_screen->device()->eglDisplay(), buffer->eglImage);
drmModeRmFB(m_screen->device()->fd(), buffer->framebufferId);
delete buffer;
}
m_framebuffers.clear();
}
GLuint QKmsBufferManager::renderTargetBuffer()
{
//TODO: Handle more senarios than assuming at least 2 buffers
if (!m_renderTarget) {
m_renderTarget = m_framebuffers.at(1);
}
return m_renderTarget->renderBuffer;
}
quint32 QKmsBufferManager::displayFramebufferId()
{
if (!m_currentDisplay) {
m_currentDisplay = m_framebuffers.at(0);
m_currentDisplay->available = false;
return m_currentDisplay->framebufferId;
}
if (!m_displayCanidate)
return m_currentDisplay->framebufferId;
m_currentDisplay->available = true;
m_displayCanidate->available = false;
m_currentDisplay = m_displayCanidate;
return m_currentDisplay->framebufferId;
}
bool QKmsBufferManager::nextBuffer()
{
m_displayCanidate = m_renderTarget;
foreach (QKmsFramebuffer *buffer, m_framebuffers) {
if (buffer->available && buffer != m_displayCanidate) {
m_renderTarget = buffer;
return true;
}
}
return false;
}
QT_BEGIN_NAMESPACE
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