/*************************************************************************
This method should be called if the texture loading failed for any reasons
*************************************************************************/
void StelTexture::reportError(const QString& aerrorMessage)
{
errorOccured = true;
errorMessage = aerrorMessage;
// Report failure of texture loading
emit(loadingProcessFinished(true));
}
bool StelTexture::glLoad(const GLData& data)
{
if (data.data.isEmpty())
{
reportError("Unknown error");
return false;
}
width = data.width;
height = data.height;
glActiveTexture(GL_TEXTURE0);
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, loadParams.filtering);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, loadParams.filtering);
glTexImage2D(GL_TEXTURE_2D, 0, data.format, width, height, 0, data.format,
data.type, data.data.constData());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, loadParams.wrapMode);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, loadParams.wrapMode);
if (loadParams.generateMipmaps)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glGenerateMipmap(GL_TEXTURE_2D);
}
// Report success of texture loading
emit(loadingProcessFinished(false));
return true;
}
// Actually load the texture to openGL memory
bool StelTexture::glLoad()
{
if (qImage.isNull())
{
errorOccured = true;
reportError("Unknown error");
return false;
}
QGLContext::BindOptions opt = QGLContext::InvertedYBindOption;
if (loadParams.filtering==GL_LINEAR)
opt |= QGLContext::LinearFilteringBindOption;
// Mipmap seems to be pretty buggy on windows..
#ifndef Q_OS_WIN
if (loadParams.generateMipmaps==true)
opt |= QGLContext::MipmapBindOption;
#endif
GLint glformat;
if (qImage.isGrayscale())
{
glformat = qImage.hasAlphaChannel() ? GL_LUMINANCE_ALPHA : GL_LUMINANCE;
}
else if (qImage.hasAlphaChannel())
{
glformat = GL_RGBA;
}
else
glformat = GL_RGB;
Q_ASSERT(StelPainter::glContext==QGLContext::currentContext());
#ifdef USE_OPENGL_ES2
glActiveTexture(GL_TEXTURE0);
#endif
id = StelPainter::glContext->bindTexture(qImage, GL_TEXTURE_2D, glformat, opt);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, loadParams.wrapMode);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, loadParams.wrapMode);
// Release shared memory
qImage = QImage();
// Report success of texture loading
emit(loadingProcessFinished(false));
return true;
}
