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+ found a solution using painter path to fix the text rending in image view

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This commit is contained in:
wmayer
2017-11-08 14:49:23 +01:00
parent ec1bcccb82
commit 547af2f5b2
3 changed files with 44 additions and 52 deletions
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88
src/Mod/Image/Gui/OpenGLImageBox.cpp
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@@ -139,7 +139,7 @@ void GLImageBox::initializeGL()
connect(logger, &QOpenGLDebugLogger::messageLogged, this, &GLImageBox::handleLoggedMessage);
if (logger->initialize())
logger->startLogging();
logger->startLogging(QOpenGLDebugLogger::SynchronousLogging);
}
#endif
}
@@ -858,70 +858,60 @@ unsigned int GLImageBox::pixValToMapIndex(double PixVal)
}
}
// https://learnopengl.com/?_escaped_fragment_=In-Practice/Text-Rendering#!In-Practice/Text-Rendering
void GLImageBox::renderText(int x, int y, const QString& str, const QFont& fnt)
{
// replacement for QGLWidget::renderText
// FIXME: The result looks very poor!
if (str.isEmpty() || !isValid())
return;
QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
//glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
//glPushAttrib(GL_ALL_ATTRIB_BITS);
GLint view[4];
bool use_scissor_testing = f->glIsEnabled(GL_SCISSOR_TEST);
//if (!use_scissor_testing)
f->glGetIntegerv(GL_VIEWPORT, &view[0]);
glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
glPushAttrib(GL_ALL_ATTRIB_BITS);
glMatrixMode(GL_TEXTURE);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glShadeModel(GL_FLAT);
glDisable(GL_CULL_FACE);
glDisable(GL_LIGHTING);
glDisable(GL_STENCIL_TEST);
glDisable(GL_DEPTH_TEST);
#if 0
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
QRect viewport(view[0], view[1], view[2], view[3]);
if (!use_scissor_testing && viewport != rect()) {
// if the user hasn't set a scissor box, we set one that
// covers the current viewport
f->glScissor(view[0], view[1], view[2], view[3]);
f->glEnable(GL_SCISSOR_TEST);
} else if (use_scissor_testing) {
// use the scissor box set by the user
f->glEnable(GL_SCISSOR_TEST);
}
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
GLfloat color[4];
f->glGetFloatv(GL_CURRENT_COLOR, &color[0]);
glGetFloatv(GL_CURRENT_COLOR, &color[0]);
QColor col;
col.setRgbF(color[0], color[1], color[2],color[3]);
QPainter painter(this);
QFont font(fnt);
font.setStyleHint(QFont::Times, QFont::PreferAntialias);
QPainter painter;
painter.begin(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::TextAntialiasing);
painter.setFont(font);
painter.setPen(col);
painter.setFont(fnt);
painter.drawText(x, y, str);
painter.end();
#else
GLfloat color[4];
glGetFloatv(GL_CURRENT_COLOR, &color[0]);
QColor col;
col.setRgbF(color[0], color[1], color[2],color[3]);
glMatrixMode(GL_TEXTURE);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glPopAttrib();
glPopClientAttrib();
QFont font(fnt);
font.setStyleHint(QFont::Times, QFont::PreferAntialias);
QPainterPath textPath;
textPath.addText(x, y, font, str);
QPainter painter;
painter.begin(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::TextAntialiasing);
painter.setBrush(col);
painter.setPen(Qt::NoPen);
painter.drawPath(textPath);
painter.end();
#endif
//glPopAttrib();
//glPopClientAttrib();
}
#include "moc_OpenGLImageBox.cpp"