texture.h

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/*
 *  OGF/Graphite: Geometry and Graphics Programming Library + Utilities
 *  Copyright (C) 2000 Bruno Levy
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  If you modify this software, you should include a notice giving the
 *  name of the person performing the modification, the date of modification,
 *  and the reason for such modification.
 *
 *  Contact: Bruno Levy
 *
 *     levy@loria.fr
 *
 *     ISA Project
 *     LORIA, INRIA Lorraine, 
 *     Campus Scientifique, BP 239
 *     54506 VANDOEUVRE LES NANCY CEDEX 
 *     FRANCE
 *
 *  Note that the GNU General Public License does not permit incorporating
 *  the Software into proprietary programs. 
 */
 
#ifndef H_OGF_RENDERER_CONTEXT_TEXTURE_H
#define H_OGF_RENDERER_CONTEXT_TEXTURE_H
 
#include <OGF/renderer/common/common.h>
#include <geogram/image/image.h>
#include <geogram_gfx/basic/GL.h>
 
namespace OGF {
 
//_________________________________________________________
 
    class RENDERER_API Texture : public Counted {
    public:
 
        Texture();
 
        ~Texture();
 
 
        index_t dimension() const;
 
        index_t width() const {
            return sizes_[0];
        }
 
        index_t height() const {
            return sizes_[1];
        }
 
        index_t depth() const {
            return sizes_[2];
        }
 
        void create_from_image(
            const Image* image,
            GLint filtering = GL_LINEAR,
            GLint wrapping = GL_CLAMP_TO_EDGE
        );
 
        void create_from_data(
            Memory::pointer ptr,
            Image::ColorEncoding color_encoding,
            Image::ComponentEncoding component_encoding,
            index_t width, index_t height, index_t depth=1,
            GLint filtering = GL_LINEAR,
            GLint wrapping = GL_CLAMP_TO_EDGE
        );
 
        void bind();
 
        void unbind();
 
        GLuint id() const {
            return id_;
        }
 
        void reset_id() {
            id_ = 0;
        }
 
        /*
         * \brief Gets the filtering mode.
         * \return one of GL_NEAREST, GL_LINEAR
         */
        GLint get_filtering() const {
            return filtering_;
        }
 
        /*
         * \brief Sets the filtering mode.
         * \param filtering one of GL_NEAREST, GL_LINEAR
         */
        void set_filtering(GLint filtering);
 
        /*
         * \brief Gets the wrapping mode.
         * \return one of GL_CLAMP_TO_EDGE, GL_WRAP.
         */
        GLint get_wrapping() const {
            return wrapping_;
        }
 
        /*
         * \brief Sets the wrapping mode.
         * \param wrapping one of GL_CLAMP_TO_EDGE, GL_WRAP.
         */
        void set_wrapping(GLint wrapping) {
            wrapping_ = wrapping;
        }
        
    protected:
 
        void create_from_data_1d(
            Memory::pointer ptr,
            Image::ColorEncoding color_encoding,
            Image::ComponentEncoding component_encoding,
            index_t width
        );
 
        void create_from_data_2d(
            Memory::pointer ptr,
            Image::ColorEncoding color_encoding,
            Image::ComponentEncoding component_encoding,
            index_t width, index_t height
        );
 
        void create_from_data_3d(
            Memory::pointer ptr,
            Image::ColorEncoding color_encoding,
            Image::ComponentEncoding component_encoding,
            index_t width, index_t height, index_t depth
        );
 
 
        static bool get_GL_formats(
            Image::ColorEncoding color_encoding,
            Image::ComponentEncoding component_encoding,
            GLint& internal_format,
            GLenum& format,
            GLenum& type
        );
        
    private:
        index_t dimension_;
        index_t sizes_[3];
        GLenum target_;
        GLUPtextureType type_;
        GLint unit_;
        GLint filtering_;
        GLint wrapping_;
        GLuint id_;
        bool has_mipmaps_;
    } ;
 
    typedef SmartPointer<Texture> Texture_var ;
 
//_________________________________________________________
 
}
#endif