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// K-3D
// Copyright (c) 1995-2008, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Timothy M. Shead (tshead@k-3d.com)
*/
#include <k3d-i18n-config.h>
#include <k3dsdk/bitmap_source.h>
#include <k3dsdk/document_plugin_factory.h>
#include <k3dsdk/gl.h>
#include <k3dsdk/icamera.h>
#include <k3dsdk/irender_viewport_gl.h>
#include <k3dsdk/measurement.h>
#include <k3dsdk/node.h>
#include <GL/glx.h>
#include <X11/Xlib.h>
namespace module
{
namespace glx
{
/////////////////////////////////////////////////////////////////////////////
// camera_to_bitmap
class camera_to_bitmap :
public k3d::node,
public k3d::bitmap_source<camera_to_bitmap>
{
typedef k3d::node base;
public:
camera_to_bitmap(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
base(Factory, Document),
m_camera(init_owner(*this) + init_name("camera") + init_label(_("Camera")) + init_description(_("Camera")) + init_value<k3d::icamera*>(0)),
m_render_engine(init_owner(*this) + init_name("render_engine") + init_label(_("Render Engine")) + init_description(_("Render Engine")) + init_value<k3d::gl::irender_viewport*>(0)),
m_width(init_owner(*this) + init_name("width") + init_label(_("Width")) + init_description(_("Bitmap width")) + init_value(256L) + init_step_increment(1) + init_units(typeid(k3d::measurement::scalar)) + init_constraint(constraint::minimum(1))),
m_height(init_owner(*this) + init_name("height") + init_label(_("Height")) + init_description(_("Bitmap height")) + init_value(256L) + init_step_increment(1) + init_units(typeid(k3d::measurement::scalar)) + init_constraint(constraint::minimum(1)))
{
m_camera.changed_signal().connect(k3d::hint::converter<
k3d::hint::convert<k3d::hint::any, k3d::hint::bitmap_pixels_changed> >(make_update_bitmap_slot()));
m_render_engine.changed_signal().connect(k3d::hint::converter<
k3d::hint::convert<k3d::hint::any, k3d::hint::bitmap_pixels_changed> >(make_update_bitmap_slot()));
m_width.changed_signal().connect(k3d::hint::converter<
k3d::hint::convert<k3d::hint::any, k3d::hint::bitmap_dimensions_changed> >(make_update_bitmap_slot()));
m_height.changed_signal().connect(k3d::hint::converter<
k3d::hint::convert<k3d::hint::any, k3d::hint::bitmap_dimensions_changed> >(make_update_bitmap_slot()));
}
void on_resize_bitmap(k3d::bitmap& Output)
{
const k3d::pixel_size_t width = m_width.pipeline_value();
const k3d::pixel_size_t height = m_height.pipeline_value();
Output.recreate(width, height);
}
void on_assign_pixels(k3d::bitmap& Output)
{
k3d::icamera* const camera = m_camera.pipeline_value();
k3d::gl::irender_viewport* const render_engine = m_render_engine.pipeline_value();
const k3d::pixel_size_t width = m_width.pipeline_value();
const k3d::pixel_size_t height = m_height.pipeline_value();
if(camera && render_engine)
{
Display* const display = XOpenDisplay(0);
return_if_fail(display);
int dummy = 0;
return_if_fail(glXQueryExtension(display, &dummy, &dummy));
int config[] = {GLX_RGBA, GLX_RED_SIZE, 8, GLX_GREEN_SIZE, 8, GLX_BLUE_SIZE, 8, GLX_DEPTH_SIZE, 8, None};
XVisualInfo* const visual = glXChooseVisual(display, DefaultScreen(display), config);
return_if_fail(visual);
const GLXContext context = glXCreateContext(display, visual, 0, false);
return_if_fail(context);
Pixmap pixmap = XCreatePixmap(display, RootWindow(display, visual->screen), width, height, visual->depth);
GLXPixmap glx_pixmap = glXCreateGLXPixmap(display, visual, pixmap);
glXMakeCurrent(display, glx_pixmap, context);
glViewport(0, 0, width, height);
GLdouble gl_view_matrix[16];
GLdouble gl_projection_matrix[16];
GLint gl_viewport[4];
render_engine->render_viewport(*camera, width, height, gl_view_matrix, gl_projection_matrix, gl_viewport);
glFlush();
boost::gil::image<boost::gil::rgba8_pixel_t, false> buffer(width, height);
glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
glPixelStorei(GL_PACK_SKIP_ROWS, 0);
glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, &view(buffer)[0]);
boost::gil::copy_pixels(boost::gil::flipped_up_down_view(boost::gil::color_converted_view<boost::gil::rgba16f_pixel_t>(view(buffer))), view(Output));
glXMakeCurrent(display, None, 0);
glXDestroyGLXPixmap(display, glx_pixmap);
XFreePixmap(display, pixmap);
}
else
{
std::fill(view(Output).begin(), view(Output).end(), k3d::pixel(0.6, 0.6, 0.6, 1.0));
}
}
static k3d::iplugin_factory& get_factory()
{
static k3d::document_plugin_factory<camera_to_bitmap,
k3d::interface_list<k3d::ibitmap_source> > factory(
k3d::uuid(0xc58d6b04, 0x0149bada, 0xde0218a4, 0x40d27b6b),
"GLXCameraToBitmap",
_("Renders the scene to a bitmap using OpenGL"),
"Bitmap Test",
k3d::iplugin_factory::EXPERIMENTAL);
return factory;
}
private:
k3d_data(k3d::icamera*, immutable_name, change_signal, with_undo, node_storage, no_constraint, node_property, node_serialization) m_camera;
k3d_data(k3d::gl::irender_viewport*, immutable_name, change_signal, with_undo, node_storage, no_constraint, node_property, node_serialization) m_render_engine;
k3d_data(k3d::int32_t, immutable_name, change_signal, with_undo, local_storage, with_constraint, measurement_property, with_serialization) m_width;
k3d_data(k3d::int32_t, immutable_name, change_signal, with_undo, local_storage, with_constraint, measurement_property, with_serialization) m_height;
};
/////////////////////////////////////////////////////////////////////////////
// camera_to_bitmap_factory
k3d::iplugin_factory& camera_to_bitmap_factory()
{
return camera_to_bitmap::get_factory();
}
} // namespace glx
} // namespace module
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