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// K-3D
// Copyright (c) 1995-2006, 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 <k3dsdk/document_plugin_factory.h>
#include <k3dsdk/gl.h>
#include <k3d-i18n-config.h>
#include <k3dsdk/imesh_painter_gl.h>
#include <k3dsdk/node.h>
#include <k3dsdk/property.h>
namespace module
{
namespace development
{
GLhandleARB compile_shader(const GLenum ShaderType, const std::string& ShaderSource)
{
GLhandleARB shader_object = glCreateShaderObjectARB(ShaderType);
return_val_if_fail(shader_object, 0);
const GLcharARB* source = ShaderSource.c_str();
glShaderSourceARB(shader_object, 1, &source, 0);
glCompileShaderARB(shader_object);
GLint compile_status = 0;
glGetObjectParameterivARB(shader_object, GL_OBJECT_COMPILE_STATUS_ARB, &compile_status);
k3d::log() << debug << "compile status: " << compile_status << std::endl;
GLint log_length = 0;
glGetObjectParameterivARB(shader_object, GL_OBJECT_INFO_LOG_LENGTH_ARB, &log_length);
std::string log(log_length, ' ');
glGetInfoLogARB(shader_object, log_length, 0, const_cast<char*>(log.data()));
k3d::log() << debug << "compile log: " << log << std::endl;
return shader_object;
}
GLhandleARB link_shader(const GLhandleARB VertexObject, const GLhandleARB FragmentObject)
{
GLhandleARB program_object = glCreateProgramObjectARB();
return_val_if_fail(program_object, 0);
glAttachObjectARB(program_object, VertexObject);
glAttachObjectARB(program_object, FragmentObject);
glLinkProgramARB(program_object);
GLint link_status = 0;
glGetObjectParameterivARB(program_object, GL_OBJECT_LINK_STATUS_ARB, &link_status);
k3d::log() << debug << "link status: " << link_status << std::endl;
GLint log_length = 0;
glGetObjectParameterivARB(program_object, GL_OBJECT_INFO_LOG_LENGTH_ARB, &log_length);
std::string log(log_length, ' ');
glGetInfoLogARB(program_object, log_length, 0, const_cast<char*>(log.data()));
k3d::log() << debug << "link log: " << log << std::endl;
return program_object;
}
/////////////////////////////////////////////////////////////////////////////
// glsl_painter
class glsl_painter :
public k3d::node,
public k3d::gl::imesh_painter
{
typedef k3d::node base;
public:
glsl_painter(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
base(Factory, Document),
m_vertex_shader(init_owner(*this) + init_name("vertex_shader") + init_label(_("Vertex Shader")) + init_description(_("Vertex shader source code")) + init_value<std::string>("")),
m_fragment_shader(init_owner(*this) + init_name("fragment_shader") + init_label(_("Fragment Shader")) + init_description(_("Fragment shader source code")) + init_value<std::string>("")),
m_program_object(0)
{
m_vertex_shader.changed_signal().connect(sigc::mem_fun(*this, &glsl_painter::on_shader_source_changed));
m_fragment_shader.changed_signal().connect(sigc::mem_fun(*this, &glsl_painter::on_shader_source_changed));
}
~glsl_painter()
{
if(m_program_object)
glDeleteObjectARB(m_program_object);
}
void on_shader_source_changed(k3d::ihint* Hint)
{
if(m_program_object)
{
glDeleteObjectARB(m_program_object);
m_program_object = 0;
}
}
void paint_mesh(const k3d::mesh& Mesh, const k3d::gl::painter_render_state& RenderState, k3d::iproperty::changed_signal_t& ChangedSignal)
{
if(!m_program_object)
{
const GLhandleARB vertex_shader_object = compile_shader(GL_VERTEX_SHADER_ARB, m_vertex_shader.pipeline_value());
const GLhandleARB fragment_shader_object = compile_shader(GL_FRAGMENT_SHADER_ARB, m_fragment_shader.pipeline_value());
m_program_object = link_shader(vertex_shader_object, fragment_shader_object);
if(fragment_shader_object)
glDeleteObjectARB(fragment_shader_object);
if(vertex_shader_object)
glDeleteObjectARB(vertex_shader_object);
}
glUseProgramObjectARB(m_program_object);
const k3d::iproperty_collection::properties_t& properties = node::properties();
for(k3d::iproperty_collection::properties_t::const_iterator prop = properties.begin(); prop != properties.end(); ++prop)
{
k3d::iproperty& property = **prop;
if(property.property_type() == typeid(k3d::inode*))
{
if(k3d::gl::imesh_painter* const painter = dynamic_cast<k3d::gl::imesh_painter*>(boost::any_cast<k3d::inode*>(k3d::property::pipeline_value(property))))
{
painter->paint_mesh(Mesh, RenderState, ChangedSignal);
}
}
}
glUseProgramObjectARB(0);
}
void select_mesh(const k3d::mesh& Mesh, const k3d::gl::painter_render_state& RenderState, const k3d::gl::painter_selection_state& SelectionState, k3d::iproperty::changed_signal_t& ChangedSignal)
{
const k3d::iproperty_collection::properties_t& properties = node::properties();
for(k3d::iproperty_collection::properties_t::const_iterator prop = properties.begin(); prop != properties.end(); ++prop)
{
k3d::iproperty& property = **prop;
if(property.property_type() == typeid(k3d::inode*))
{
if(k3d::gl::imesh_painter* const painter = dynamic_cast<k3d::gl::imesh_painter*>(boost::any_cast<k3d::inode*>(k3d::property::pipeline_value(property))))
{
painter->select_mesh(Mesh, RenderState, SelectionState, ChangedSignal);
}
}
}
}
static k3d::iplugin_factory& get_factory()
{
static k3d::document_plugin_factory<glsl_painter, k3d::interface_list<k3d::gl::imesh_painter > > factory(
k3d::uuid(0x24d4d987, 0x62f849ea, 0xad1907fe, 0xe2a0a728),
"OpenGLSLPainter",
_("Applies an OpenGL shader to downstream painters"),
"OpenGL Painter",
k3d::iplugin_factory::EXPERIMENTAL);
return factory;
}
private:
k3d_data(std::string, immutable_name, change_signal, with_undo, local_storage, no_constraint, script_property, with_serialization) m_vertex_shader;
k3d_data(std::string, immutable_name, change_signal, with_undo, local_storage, no_constraint, script_property, with_serialization) m_fragment_shader;
GLhandleARB m_program_object;
};
/////////////////////////////////////////////////////////////////////////////
// glsl_painter_factory
k3d::iplugin_factory& glsl_painter_factory()
{
return glsl_painter::get_factory();
}
} // namespace development
} // namespace module
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