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// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//
#include <BALL/VIEW/KERNEL/common.h>
#ifdef BALL_HAS_GLEW
# include <GL/glew.h>
#endif
#include <BALL/VIEW/RENDERING/glRenderWindow.h>
#include <BALL/VIEW/WIDGETS/scene.h>
#include <BALL/COMMON/logStream.h>
#include <BALL/VIEW/KERNEL/mainControl.h>
#include <QtCore/QEvent>
#include <QtGui/QPaintEvent>
#include <QtGui/QWindow>
//#define USE_GLPAINTPIXELS
#undef USE_GLPAINTPIXELS
namespace BALL
{
namespace VIEW
{
QGLFormat GLRenderWindow::gl_format_(
QGL::DepthBuffer |
#ifndef BALL_OS_DARWIN
/*
* StereoBuffers on Linux/X11 are broken in QGLWidget 5.7.0 and 5.7.1
* https://github.com/BALL-Project/ball/issues/630
*/
# if !defined(BALL_OS_LINUX) || QT_VERSION < QT_VERSION_CHECK(5, 7, 0) || QT_VERSION > QT_VERSION_CHECK(5, 7, 1)
QGL::StereoBuffers |
# endif
#endif
QGL::DoubleBuffer |
QGL::DirectRendering |
QGL::SampleBuffers |
QGL::StencilBuffer);
GLRenderWindow::GLRenderWindow()
: QGLWidget(gl_format_),
stereo_delta_(0.f),
m_screenTexID(0),
FB_TEXTURE_TARGET(GL_TEXTURE_2D),
FB_TEXTURE_FORMAT(GL_RGB),
FB_INTERNAL_TEXTURE_FORMAT(GL_RGB),
FB_TEXTURE_DATATYPE(GL_FLOAT),
ignore_events_(false),
down_sampling_factor_(1.f)
{
// we will swap buffers manually in the scene for synchronization
setAutoBufferSwap(false);
setAutoFillBackground(false);
}
GLRenderWindow::GLRenderWindow(QWidget* parent_widget, const char* /*name*/, Qt::WindowFlags w_flags)
: QGLWidget(gl_format_, parent_widget, nullptr, w_flags),
stereo_delta_(0.f),
m_screenTexID(0),
FB_TEXTURE_TARGET(GL_TEXTURE_2D),
FB_TEXTURE_FORMAT(GL_RGB),
FB_INTERNAL_TEXTURE_FORMAT(GL_RGB),
FB_TEXTURE_DATATYPE(GL_FLOAT),
ignore_events_(false),
down_sampling_factor_(1)
{
if (!QGLWidget::isValid())
{
Log.error() << "QGLWidget is not valid in Scene!" << std::endl;
}
// we will swap buffers manually in the scene for synchronization
setAutoBufferSwap(false);
setAutoFillBackground(false);
}
GLRenderWindow::GLRenderWindow(const GLRenderWindow& window, QWidget* parent_widget, const char* /*name*/, Qt::WindowFlags w_flags)
: QGLWidget(gl_format_, parent_widget, &window, w_flags),
stereo_delta_(0.f),
m_screenTexID(0),
FB_TEXTURE_TARGET(GL_TEXTURE_2D),
FB_TEXTURE_FORMAT(GL_RGB),
FB_INTERNAL_TEXTURE_FORMAT(GL_RGB),
FB_TEXTURE_DATATYPE(GL_FLOAT),
ignore_events_(false),
down_sampling_factor_(1.f)
{
// we will swap buffers manually in the scene for synchronization
setAutoBufferSwap(false);
setAutoFillBackground(false);
}
GLRenderWindow::~GLRenderWindow()
{
deleteTexture();
}
bool GLRenderWindow::init()
{
checkGL();
// TODO: is this necessary?
if (!format().rgba())
Log.error() << "No RGBA mode for OpenGl available." << std::endl;
RenderWindow::init();
bool result = false;
FB_TEXTURE_TARGET = GL_TEXTURE_2D;
if(m_fmt.getPixelFormat() == PixelFormat::RGBF_96)
{
FB_INTERNAL_TEXTURE_FORMAT = GL_RGB;
FB_TEXTURE_FORMAT = GL_RGB;
FB_TEXTURE_DATATYPE = GL_FLOAT;
result = true;
}
else
{
if(m_fmt.getPixelFormat() == PixelFormat::RGBA_32)
{
FB_INTERNAL_TEXTURE_FORMAT = GL_RGBA;
FB_TEXTURE_FORMAT = GL_RGBA;
FB_TEXTURE_DATATYPE = GL_UNSIGNED_BYTE;
}
result = true;
}
return result;
}
bool GLRenderWindow::resize(const unsigned int width, const unsigned int height)
{
if(!RenderWindow::resize((int)ceil(width/down_sampling_factor_), (int)ceil(height/down_sampling_factor_)))
{
return false;
}
createTexture((int)ceil(width/down_sampling_factor_), (int)ceil(height/down_sampling_factor_));
QGLWidget::resize(width, height);
return true;
}
void GLRenderWindow::refresh()
{
RenderWindow::refresh();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glPushAttrib(GL_TEXTURE_BIT);
glPushAttrib(GL_DEPTH_BUFFER_BIT);
#ifdef USE_GLPAINTPIXELS
glDrawPixels(m_fmt.getWidth(), m_fmt.getHeight(), FB_TEXTURE_FORMAT, FB_TEXTURE_DATATYPE, m_pixels.get());
#else
glBindTexture(FB_TEXTURE_TARGET, m_screenTexID);
glTexSubImage2D(FB_TEXTURE_TARGET, 0, 0, 0, m_fmt.getWidth(), m_fmt.getHeight(),
FB_TEXTURE_FORMAT, FB_TEXTURE_DATATYPE, m_pixels.get());
glEnable(FB_TEXTURE_TARGET);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
#endif
glDisable(GL_DEPTH_TEST);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glPushAttrib(GL_VIEWPORT_BIT);
#ifndef USE_GLPAINTPIXELS
glViewport(0, 0, down_sampling_factor_*m_fmt.getWidth(), down_sampling_factor_*m_fmt.getHeight());
float aspectRatio = static_cast<float>(m_fmt.getWidth()) / m_fmt.getHeight();
glOrtho(-aspectRatio, aspectRatio, -1.0f, 1.0f, -1.0f, 1.0f);
float origWidth = static_cast<float>(m_fmt.getWidth());
float newWidth = (origWidth + fabs(stereo_delta_));
float newRatio = origWidth / newWidth;
float deltaRatio = 1.f - newRatio;
glBegin(GL_QUADS);
if (stereo_delta_ <= 0.)
{
glTexCoord2f(0.0f+deltaRatio, 0.0f);
glVertex2f(-aspectRatio, -1.0f);
glTexCoord2f(1.0f, 0.0f );
glVertex2f(aspectRatio, -1.0f);
glTexCoord2f(1.0f, 1.0f );
glVertex2f(aspectRatio, 1.0f);
glTexCoord2f(0.0f+deltaRatio, 1.0f);
glVertex2f(-aspectRatio, 1.0f);
}
else
{
glTexCoord2f(0.0f, 0.0f);
glVertex2f(-aspectRatio, -1.0f);
glTexCoord2f(1.0f-deltaRatio, 0.0f );
glVertex2f(aspectRatio, -1.0f);
glTexCoord2f(1.0f-deltaRatio, 1.0f );
glVertex2f(aspectRatio, 1.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex2f(-aspectRatio, 1.0f);
}
glEnd();
#endif
glPopAttrib();
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopAttrib();
glPopAttrib();
}
void GLRenderWindow::renderText(int x, int y, const String& text, const ColorRGBA& color, Size size)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0, 0, m_fmt.getWidth(), m_fmt.getHeight());
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
QFont font;
font.setPixelSize(size);
font.setBold(true);
glDisable(GL_LIGHTING);
glColor4ub(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha());
QGLWidget::renderText(x, y, text.c_str(), font);
glEnable(GL_LIGHTING);
}
void GLRenderWindow::renderText(float x, float y, float z, const String& text, const ColorRGBA& color, Size size)
{
// TEST!
return;
QFont font;
font.setPixelSize(size);
font.setBold(true);
glDisable(GL_LIGHTING);
glColor4ub(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha());
QGLWidget::renderText(x, y, z, text.c_str(), font);
glEnable(GL_LIGHTING);
}
void GLRenderWindow::createTexture(const unsigned int width, const unsigned int height)
{
if(m_screenTexID != 0)
{
deleteTexture();
}
glGenTextures(1, &m_screenTexID);
glBindTexture(FB_TEXTURE_TARGET, m_screenTexID);
glTexParameteri(FB_TEXTURE_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(FB_TEXTURE_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(FB_TEXTURE_TARGET, 0, FB_INTERNAL_TEXTURE_FORMAT, width, height, 0, FB_TEXTURE_FORMAT, FB_TEXTURE_DATATYPE, NULL);
glBindTexture(FB_TEXTURE_TARGET, 0);
}
void GLRenderWindow::deleteTexture()
{
glDeleteTextures(1, &m_screenTexID);
m_screenTexID = 0;
}
bool GLRenderWindow::errorInGL(GLenum& error)
{
error = glGetError();
return (error != GL_NO_ERROR);
}
String GLRenderWindow::getGLErrorString(GLenum error)
{
String result;
switch(error)
{
case GL_INVALID_ENUM:
result = "Invalid enumeration value";
break;
case GL_INVALID_VALUE:
result = "Numeric argument out of range";
break;
case GL_INVALID_OPERATION:
result = "Operation illegal in current state";
break;
case GL_STACK_OVERFLOW:
result = "Command would cause stack overflow";
break;
case GL_STACK_UNDERFLOW:
result = "Command would cause stack underflow";
break;
case GL_OUT_OF_MEMORY:
result = "Not enough memory left to execute command";
break;
case GL_TABLE_TOO_LARGE:
result = "The specified table is too large";
break;
default:
result = "Uknown OpenGL error";
}
return result;
}
void GLRenderWindow::checkGL()
{
GLenum err;
if(errorInGL(err))
{
BALL::Log.error() << "Error in OpenGL: " << getGLErrorString(err) << std::endl;
}
}
void GLRenderWindow::customEvent(QEvent* evt)
{
switch(static_cast<EventsIDs>(evt->type())) {
case RENDER_TO_BUFFER_FINISHED_EVENT:
refresh();
safeBufferSwap();
break;
default:
break;
}
}
void GLRenderWindow::paintEvent(QPaintEvent* e)
{
if (!ignore_events_)
{
QGLWidget::paintEvent(e);
}
}
void GLRenderWindow::lockGLContext()
{
contex_mutex_.lock();
makeCurrent();
}
void GLRenderWindow::unlockGLContext()
{
doneCurrent();
contex_mutex_.unlock();
}
void GLRenderWindow::setupStereo(float eye_separation, float focal_length)
{
float aperture = 60.f;
float width = static_cast<float>(m_fmt.getWidth());
//formula according to Paul Bourke
//http://local.wasp.uwa.edu.au/~pbourke/miscellaneous/stereographics/stereorender/
stereo_delta_ = (fabs(eye_separation) * width) / (focal_length * tan(Angle(aperture, false).toRadian()));
std::cout << stereo_delta_ << std::endl;
}
void GLRenderWindow::safeBufferSwap()
{
if(isVisible() && getMainControl()->windowHandle()->isExposed())
{
swapBuffers();
}
}
} // namespace VIEW
} //namespace BALL
|
