image_reader.h

#pragma once
 
#include <cgv/base/base.h>
#include <cgv/data/data_view.h>
 
#include "lib_begin.h"
 
using namespace cgv::data;
 
namespace cgv {
        namespace media {
                namespace image {
 
class CGV_API image_reader;
 
class CGV_API abst_image_reader : public cgv::base::base
{
public:
        friend class image_reader;
        virtual abst_image_reader* clone() const = 0;
        virtual const std::string& get_last_error() const = 0;
        virtual const char* get_supported_extensions() const = 0;
        virtual bool open(const std::string& file_name, data_format& df, std::vector<data_format>* palette_formats) = 0;
        virtual bool supports_per_line_read() const = 0;
        virtual bool supports_multiple_images() const;
        virtual unsigned get_nr_images() const;
        virtual float get_image_duration() const;
        virtual unsigned get_current_image() const;
        virtual bool seek_image(unsigned idx);
 
        virtual bool read_palette(unsigned int i, const data_view& dv);
        virtual bool read_line(const data_format& df, const data_view& dv) = 0;
 
        virtual bool read_image(const data_format& df, const data_view& dv) = 0;
        virtual bool close() = 0;
 
};
 
class CGV_API image_reader : public cgv::base::base
{
protected:
        data_format* file_format_ptr;
        std::vector<data_format>* palette_formats;
        abst_image_reader* rd;
        std::string last_error;
        bool set_void(const std::string& property, const std::string& type, const void* value);
        bool get_void(const std::string& property, const std::string& type, void* value);
public:
        image_reader(data_format& file_format, std::vector<data_format>* palette_formats = 0);
        ~image_reader() {}
        std::string get_type_name() const;
        static const std::string& get_supported_extensions(char sep = ';');
        static std::string construct_filter_string();
        std::string get_property_declarations();
        const std::string& get_last_error() const;
        bool read_image(const std::string& file_name, data_view& dv, std::vector<data_view> *palettes = 0);
        bool read_image(const std::string& file_name, const data_view& dv, const std::vector<data_view> *palettes = 0);
        bool open(const std::string& file_name);
        data_format* get_file_format() const;
        bool supports_multiple_images() const;
        unsigned get_nr_images() const;
        float get_image_duration() const;
        unsigned get_current_image() const;
        bool seek_image(unsigned idx);
 
        bool read_palette(unsigned int i, data_view& dv);
 
        bool read_palette(unsigned int i, const data_view& dv);
        bool supports_per_line_read() const;
        bool read_line(data_view& dv);
        bool read_line(const data_view& dv);
 
        bool read_image(data_view& dv, std::vector<data_view> *palettes = 0);
        bool read_image(const data_view& dv, const std::vector<data_view> *palettes = 0);
        bool close();
};
 
                }
        }
}
 
#include <cgv/config/lib_end.h>