paysages3d/gui_qt/baseexplorerchunk.cpp

151 lines
No EOL
3.7 KiB
C++

#include "baseexplorerchunk.h"
BaseExplorerChunk::BaseExplorerChunk(Renderer* renderer)
{
_renderer = renderer;
priority = 0.0;
_reset_needed = false;
_texture = new QImage(1, 1, QImage::Format_ARGB32);
_texture_id = 0;
_texture_changed = false;
_texture_current_size = 0;
_texture_max_size = 0;
}
BaseExplorerChunk::~BaseExplorerChunk()
{
_lock_data.lock();
delete _texture;
_lock_data.unlock();
}
bool BaseExplorerChunk::maintain()
{
bool subchanged;
_lock_data.lock();
if (_reset_needed)
{
_reset_needed = false;
_texture_current_size = 0;
onResetEvent();
}
_lock_data.unlock();
subchanged = onMaintainEvent();
// Improve texture resolution
if (_texture_current_size < _texture_max_size)
{
int new_texture_size = _texture_current_size ? _texture_current_size * 2 : 1;
QImage* new_image = new QImage(_texture->scaled(new_texture_size + 1, new_texture_size + 1, Qt::IgnoreAspectRatio, Qt::FastTransformation));
for (int j = 0; j <= new_texture_size; j++)
{
for (int i = 0; i <= new_texture_size; i++)
{
if (_texture_current_size <= 1 || i % 2 != 0 || j % 2 != 0)
{
Color color = getTextureColor((double)i / (double)new_texture_size, 1.0 - (double)j / (double)new_texture_size);
colorNormalize(&color);
new_image->setPixel(i, j, colorTo32BitBGRA(&color));
}
}
}
_lock_data.lock();
delete _texture;
_texture = new_image;
_texture_current_size = new_texture_size;
_texture_changed = true;
_lock_data.unlock();
return true;
}
else
{
return subchanged;
}
}
void BaseExplorerChunk::updatePriority(CameraDefinition* camera)
{
if (_reset_needed || (_texture_max_size > 1 && _texture_current_size <= 1))
{
priority = 1000.0;
}
else if (_texture_current_size == _texture_max_size)
{
priority = -1000.0;
}
else
{
priority = getDisplayedSizeHint(camera) - _texture_current_size;
}
onCameraEvent(camera);
}
void BaseExplorerChunk::render(QGLWidget* widget)
{
// Put texture in place
_lock_data.lock();
if (_texture_changed)
{
_texture_changed = false;
if (_texture_id)
{
widget->deleteTexture(_texture_id);
}
// TODO Only do the scale if not power-of-two textures are unsupported by GPU
_texture_id = widget->bindTexture(_texture->scaled(_texture_current_size, _texture_current_size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
//_texture_id = widget->bindTexture(*_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
else
{
glBindTexture(GL_TEXTURE_2D, _texture_id);
}
_lock_data.unlock();
// Delegate poly rendering to subclass
onRenderEvent(widget);
}
void BaseExplorerChunk::askReset()
{
_reset_needed = true;
}
void BaseExplorerChunk::setMaxTextureSize(int size)
{
_texture_max_size = size;
}
void BaseExplorerChunk::onCameraEvent(CameraDefinition* camera)
{
}
void BaseExplorerChunk::onResetEvent()
{
}
bool BaseExplorerChunk::onMaintainEvent()
{
return false;
}
void BaseExplorerChunk::onRenderEvent(QGLWidget* widget)
{
}
double BaseExplorerChunk::getDisplayedSizeHint(CameraDefinition* camera)
{
return 0.0;
}
Color BaseExplorerChunk::getTextureColor(double x, double y)
{
return COLOR_TRANSPARENT;
}