texture.cxx

#include "texture.h"
#include "frame_buffer.h"
 
#include <cgv/media/image/image_reader.h>
#include <cgv/media/image/image_writer.h>
#include <cgv/utils/tokenizer.h>
#include <cgv/utils/file.h>
#include <cgv/utils/statistics.h>
 
using namespace cgv::data;
using namespace cgv::media::image;
using namespace cgv::utils;
using namespace cgv::utils::file;
 
namespace cgv {
    namespace render {
 
texture::texture(const std::string& description, 
          TextureFilter _mag_filter, 
         TextureFilter _min_filter, 
          TextureWrap   _wrap_s,
          TextureWrap   _wrap_t,
          TextureWrap   _wrap_r) : data::data_format(description)
{
    mag_filter = _mag_filter; 
    min_filter = _min_filter; 
    wrap_s = _wrap_s;   
    wrap_t = _wrap_t;   
    wrap_r = _wrap_r;
    state_out_of_date = true;
    have_mipmaps = false;
    tex_unit = -1;
}
 
texture::~texture()
{
    if(ctx_ptr && ctx_ptr->make_current())
        destruct(*ctx_ptr);
 
    if(handle != 0)
        std::cerr << "could not destruct texture properly" << std::endl;
}
 
bool texture::set_data_format(const std::string& description)
{
    bool res = data_format::set_data_format(description);
    internal_format = 0;
    state_out_of_date = true;
    return res;
}
 
void texture::set_component_format(const component_format& cf)
{
    data_format::set_component_format(cf);
    internal_format = 0;
    state_out_of_date = true;
}
 
void texture::set_component_format(const std::string& description)
{
    component_format::set_component_format(description);
    internal_format = 0;
    state_out_of_date = true;
}
 
void texture::set_wrap_s(TextureWrap _wrap_s)
{
    wrap_s = _wrap_s;
    state_out_of_date = true;
}
void texture::set_wrap_t(TextureWrap _wrap_t)
{
    wrap_t = _wrap_t;
    state_out_of_date = true;
}
void texture::set_wrap_r(TextureWrap _wrap_r)
{
    wrap_r = _wrap_r;
    state_out_of_date = true;
}
TextureWrap texture::get_wrap_s() const
{
    return wrap_s;
}
TextureWrap texture::get_wrap_t() const
{
    return wrap_t;
}
TextureWrap texture::get_wrap_r() const
{
    return wrap_r;
}
void texture::set_border_color(float r, float g, float b, float a)
{
    border_color[0] = r;
    border_color[1] = g;
    border_color[2] = b;
    border_color[3] = a;
    state_out_of_date = true;
}
void texture::set_min_filter(TextureFilter _min_filter, float _anisotropy)
{
    min_filter = _min_filter;
    anisotropy = _anisotropy;
    state_out_of_date = true;
}
 
TextureFilter texture::get_min_filter() const
{
    return min_filter;
}
float texture::get_anisotropy() const
{
    return anisotropy;
}
void texture::set_mag_filter(TextureFilter _mag_filter)
{
    mag_filter = _mag_filter;
    state_out_of_date = true;
}
TextureFilter texture::get_mag_filter() const
{
    return mag_filter;
}
void texture::set_priority(float _priority)
{
    priority = _priority;
    state_out_of_date = true;
}
float texture::get_priority() const
{
    return priority;
}
void texture::set_compare_mode(bool _use_compare_function)
{
    use_compare_function = _use_compare_function;
    state_out_of_date = true;
}
bool texture::get_compare_mode() const
{
    return use_compare_function;
}
 
void texture::set_compare_function(CompareFunction _compare_function)
{
    compare_function = _compare_function;
    state_out_of_date = true;
}
 
CompareFunction texture::get_compare_function() const
{
    return compare_function;
}
 
 
 
void texture::find_best_format(const context& ctx, const std::vector<data_view>* palettes)
{
    cgv::data::component_format cf = ctx.texture_find_best_format(*this, *this, palettes);
    void* tmp = internal_format;
    set_component_format(cf);
    internal_format = tmp;
}
 
void texture::ensure_state(const context& ctx) const
{
    if (state_out_of_date) {
        ctx.texture_set_state(*this);
        state_out_of_date = false;
    }
}
 
bool texture::create(const context& ctx, TextureType _tt, unsigned width, unsigned height, unsigned depth)
{
    if (is_created())
        destruct(ctx);
    if (_tt != TT_UNDEF)
        tt = _tt;
    if (width != -1)
        set_width(width);
    if (height != -1)
        set_height(height);
    if (depth != -1)            
        set_depth(depth);
    if (!internal_format)
        find_best_format(ctx);
    return complete_create(ctx, ctx.texture_create(*this, *this));
}
 
void texture::set_nr_multi_samples(unsigned _nr_samples)
{
    nr_multi_samples = _nr_samples;
}
 
void texture::set_fixed_sample_locations(bool use)
{
    fixed_sample_locations = use; 
}
 
template <class int_type>
bool is_power_of_two(int_type i)
{
    do {
        if (i == 1)
            return true;
        if ((i & 1) != 0)
            return false;
        i /= 2;
    } 
    while (true);
    return false;
}
 
template <class int_type>
int_type power_of_two_ub(int_type i)
{
    int_type res = 2;
    while (res < i)
        res *= 2;
    return res;
}
 
bool texture::create_from_image(cgv::data::data_format& df, cgv::data::data_view& dv, const context& ctx,
                                const std::string& file_name, unsigned char* clear_color_ptr, int level, int cube_side)
{
    bool ensure_power_of_two = clear_color_ptr != 0;
    std::string fn = file_name;
    if (df.empty()) {
        if (fn.empty()) {
            cgv::render::render_component::last_error = "attempt to create texture from empty file name";
            return false;
        }
    }
    std::vector<data_format> palette_formats;
    std::vector<data_view> palettes;
    if (!fn.empty()) {
        image_reader ir(df, &palette_formats);
        if (!ir.read_image(fn, dv)) {
            cgv::render::render_component::last_error = "error reading image file ";
            cgv::render::render_component::last_error += fn;
            cgv::render::render_component::last_error += ": ";
            cgv::render::render_component::last_error += ir.get_last_error();
            return false;
        }
        for (unsigned i=0; i<palette_formats.size(); ++i) {
            palettes.push_back(data_view());
            if (!ir.read_palette(i, palettes.back())) {
                cgv::render::render_component::last_error = "error reading palette";
                return false;
            }
        }
    }
    if (cube_side < 1)
        destruct(ctx);
    size_t w = df.get_width(), h = df.get_height();
    size_t W = w, H = h;
    data_format df1(df);
    if (ensure_power_of_two && (!is_power_of_two(w) || !is_power_of_two(h))) {
        W = power_of_two_ub(df.get_width());
        H = power_of_two_ub(df.get_height());
        df1.set_width(W);
        df1.set_height(H);
    }
    //float ext[2] = { (float)w/W, (float)h/H };
    data_view dv1(&df1);
    unsigned          entry_size = df.get_entry_size();
    const unsigned char* src_ptr = dv.get_ptr<unsigned char>();
    unsigned char*      dest_ptr = dv1.get_ptr<unsigned char>();
    unsigned char*  dest_ptr_end = dest_ptr + entry_size * W*H;
    for (unsigned y = 0; y < h; ++y) {
        dest_ptr_end -= W * entry_size;
        memcpy(dest_ptr_end, src_ptr, w*entry_size);
        if (clear_color_ptr) {
            for (size_t x = w; x < W; ++x)
                memcpy(dest_ptr_end + x * entry_size, clear_color_ptr, entry_size);
        }
        else
            std::fill(dest_ptr_end + w * entry_size, dest_ptr_end + W*entry_size, 0);
        src_ptr += w * entry_size;
    }
    if (H > h) {
        size_t N = (H - h)*W;
        if (clear_color_ptr) {
            for (size_t i = 0; i < N; ++i)
                memcpy(dest_ptr + i * entry_size, clear_color_ptr, entry_size);
        }
        else
            std::fill(dest_ptr, dest_ptr + N*entry_size, 0);
    }
    return create(ctx, dv1, level, cube_side, false, &palettes);
}
 
 
bool texture::create_from_image(const context& ctx,
    const std::string& file_name, int* image_width_ptr, int* image_height_ptr,
    unsigned char* clear_color_ptr, int level, int cube_side)
{
    data_format df;
    data_view dv;
    if (!create_from_image(df,dv,ctx,file_name,clear_color_ptr,level,cube_side))
        return false;
    if (image_width_ptr)
        *image_width_ptr = int(df.get_width());
    if (image_height_ptr)
        *image_height_ptr = int(df.get_height());
    return true;
}
 
bool texture::deduce_file_names(const std::string& file_names, std::vector<std::string>& deduced_names)
{
    if (std::find(file_names.begin(), file_names.end(), '{') != file_names.end()) {
        std::vector<token> toks;
        deduced_names.resize(6);
        tokenizer(file_names).set_ws("").set_sep("{,}").bite_all(toks);
        int selection = -1;
        for (unsigned i=0; i<toks.size(); ++i) {
            if (toks[i] == "{") {
                if (selection != -1) {
                    std::cerr << "warning: nested {} not allowed in cubemap file names specification " << file_names << std::endl;
                    return false;
                }
                selection = 0;
            }
            else if (toks[i] == "}") {
                if (selection == -1) {
                    std::cerr << "warning: } without opening { in cubemap file names specification " << file_names << std::endl;
                    return false;
                }
                if (selection != 5) {
                    std::cerr << "warning: no 6 file names specified for creating cubemap from images " << file_names << std::endl;
                    return false;
                }
                selection = -1;
            }
            else if (toks[i] == ",") {
                if (selection == -1) {
                    std::cerr << "warning: , arising outside {} in cubemap file names specification " << file_names << std::endl;
                    return false;
                }
                ++selection;
            }
            else {
                if (selection == -1) {
                    for (unsigned j=0; j<6; ++j)
                        deduced_names[j] += to_string(toks[i]);
                }
                else {
                    if (selection == 6) {
                        std::cerr << "warning: more than 6 files names specified for cubemap creation " << file_names << std::endl;
                        return false;
                    }
                    deduced_names[selection] += to_string(toks[i]);
                }
            }
        }
    }
    else {
        std::string path_prefix = get_path(file_names);
        if (!path_prefix.empty())
            path_prefix += '/';
        void* handle = find_first(file_names);
        while (handle != 0) {
            deduced_names.push_back(path_prefix+find_name(handle));
            handle = find_next(handle);
        }
        if (deduced_names.size() != 6) {
            std::cerr << "warning: not exactly 6 files names specified for cubemap creation " << file_names << std::endl;
            return false;
        }
    }
    return true;
}
 
bool texture::create_from_images(const context& ctx, const std::string& file_names, int level)
{
    std::vector<std::string> deduced_names;
    if (!deduce_file_names(file_names, deduced_names))
        return false;
    bool success = true;
    for (unsigned i=0; success && i<6; ++i)
        if (!create_from_image(ctx, deduced_names[i],0,0,0,level,i)) {
            success = false;
            std::cerr << "could not create cubemap side " << i << " from image " << deduced_names[i] << std::endl;
        }
    if (!success)
        destruct(ctx);
    return success;
}
 
bool texture::write_to_file(context& ctx, const std::string& file_name, unsigned int z_or_cube_size, float depth_map_gamma, const std::string& options) const
{
    std::string& last_error = static_cast<const cgv::render::texture_base*>(this)->last_error;
    if (!is_created()) {
        last_error = "texture must be created for write_to_file";
        return false;
    }
    frame_buffer fb;
    if (!fb.create(ctx,int(get_width()), int(get_height()))) {
        last_error = "could not create frame buffer object for write_to_file";
        return false;
    }
    if (z_or_cube_size != -1) {
        if (!fb.attach(ctx,*this,z_or_cube_size,0,0)) {
            last_error = "could not attach texture for write_to_file";
            return false;
        }
    }
    else {
        if (!fb.attach(ctx,*this)) {
            last_error = "could not attach texture for write_to_file";
            return false;
        }
    }
    bool is_depth = get_standard_component_format() == CF_D;
    data_format df("uint8[R,G,B]");
    if (is_depth) {
        render_buffer rb("[R,G,B]");
        df = data_format("uint32[D]");
        rb.create(ctx, int(get_width()), int(get_height()));
        if (!fb.attach(ctx, rb)) {
            last_error = "could not attach color buffer for write_to_file";
            return false;
        }
    }
    if (!fb.is_complete(ctx)) {
        last_error = "frame buffer object not complete for write_to_file due to\n";
        last_error += fb.last_error;
        return false;
    }
    fb.enable(ctx);
        df.set_width(get_width());
        df.set_height(get_height());
        data_view dv(&df);
        ctx.read_frame_buffer(dv, 0, 0, cgv::render::FB_0);
    fb.disable(ctx);
 
    if (is_depth) {
        cgv::utils::statistics stats;
        size_t i, n = get_width()*get_height();
        for (i = 0; i < n; ++i)
            stats.update(dv.get_ptr<cgv::type::uint32_type>()[i]);
        cgv::type::uint32_type min_val = cgv::type::uint32_type(stats.get_min());
        cgv::type::uint32_type max_val = cgv::type::uint32_type(stats.get_max());
        data_format df2(get_width(), get_height(), cgv::type::info::TI_UINT8, cgv::data::CF_RGB);
        data_view dv2(&df2);
        for (i = 0; i < n; ++i) {
            double mapped_value = pow(double(dv.get_ptr<cgv::type::uint32_type>()[i] - min_val) / (max_val - min_val), depth_map_gamma);
            cgv::type::uint8_type v = cgv::type::uint8_type(255 * mapped_value);
            dv2.get_ptr<cgv::math::fvec<cgv::type::uint8_type, 3> >()[i].set(v, v, v);
        }
        image_writer w(file_name);
        if (!w.write_image(dv2)) {
            last_error = "could not write image file ";
            last_error += file_name;
            return false;
        }
        return true;
    }
    image_writer w(file_name);
    w.multi_set(options);
    if (!w.write_image(dv)) {
        last_error = "could not write image file ";
        last_error += file_name;
        return false;
    }
    return true;
}
 
bool texture::create_mipmaps(const context& ctx)
{
    if(!is_created()) {
        render_component::last_error = "attempt to create mipmap levels for texture that is not created";
        return false;
    }
    return ctx.texture_create_mipmaps(*this, *this);
}
 
bool texture::generate_mipmaps(const context& ctx)
{
    return ctx.texture_generate_mipmaps(*this, get_nr_dimensions());
}
 
bool texture::complete_create(const context& ctx, bool created)
{
    state_out_of_date = true;
    ctx_ptr = &ctx;
    if (created)
        ensure_state(ctx);
    return created;
}
 
 
bool texture::create_from_buffer(const context& ctx, int x, int y, int width, int height, int level)
{
    if (is_created() && level < 1)
        return replace_from_buffer(ctx, 0, 0, x, y, width, height, level);
 
    if (level <= 0) {
        destruct(ctx);
        set_nr_dimensions(2);
        set_width(width);
        set_height(height);
    }
    if (level == -1 && !internal_format)
        find_best_format(ctx);
    return complete_create(ctx, ctx.texture_create_from_buffer(*this, *this, x, y, level));
}
 
bool texture::create(const context& ctx, const cgv::data::const_data_view& data, int level, int cube_side, int num_array_layers, const std::vector<data_view>* palettes)
{
    const data_format& f = *data.get_format();
    TextureType tt = (TextureType)f.get_nr_dimensions();
    
    if(cube_side > -1) {
        if(tt == TT_2D)
            tt = TT_CUBEMAP;
    } else if(num_array_layers != 0) {
        if(num_array_layers < 0) {
            // automatic inference of layers from texture dimensions
            unsigned n_dims = f.get_nr_dimensions();
            if(n_dims == 2)
                tt = TT_1D_ARRAY;
            if(n_dims == 3)
                tt = TT_2D_ARRAY;
        } else {
            switch(tt) {
            case TT_1D: tt = TT_1D_ARRAY; break;
            case TT_2D: tt = TT_2D_ARRAY; break;
            case TT_3D: tt = TT_2D_ARRAY; break;
            }
        }
    }
    // TODO: replace is currently only allowed for non-array type textures. If this changes make sure to modify the replace method accordingly including generating mipmaps.
    if ((tt == TT_1D || tt == TT_2D || tt == TT_3D) && is_created()) {
        bool replace_allowed = tt == this->tt;
        for(unsigned i = 0; replace_allowed && i < get_nr_dimensions(); ++i)
            if(get_resolution(i) != f.get_resolution(i))
                replace_allowed = false;
        if (replace_allowed && level < 1) {
            switch (tt) {
            case TT_1D : return replace(ctx, 0, data, level, palettes);
            case TT_2D : return replace(ctx, 0, 0, data, level, palettes);
            case TT_3D : return replace(ctx, 0, 0, 0, data, level, palettes);
            }
            return false;
        }
        destruct(ctx);
    }
    if (level < 1) {
        set_nr_dimensions(data.get_format()->get_nr_dimensions());
        for(unsigned int i = 0; i < get_nr_dimensions(); ++i)
            set_resolution(i, data.get_format()->get_resolution(i));
        if (get_nr_components() != data.get_format()->get_nr_components())
            static_cast<component_format&>(*this) = *data.get_format();
        if (level == -1 || !internal_format)
            find_best_format(ctx, palettes);
    }
    return complete_create(ctx, ctx.texture_create(*this, *this, data, level, cube_side, num_array_layers, palettes));
}
 
bool texture::replace(const context& ctx, int x, const cgv::data::const_data_view& data, int level, const std::vector<data_view>* palettes)
{
    if (!is_created()) {
        render_component::last_error = "attempt to replace in a not created 1d texture";
        return false;
    }
    if (data.get_format()->get_nr_dimensions() > 1) {
        render_component::last_error = "cannot replace block in 1d texture with 2d or 3d data block";
        return false;
    }
    return ctx.texture_replace(*this,x,-1,-1,data,level, palettes);
}
 
bool texture::replace(const context& ctx, int x, int y, const cgv::data::const_data_view& data, int level, const std::vector<data_view>* palettes)
{
    if (!is_created()) {
        render_component::last_error = "attempt to replace in a not created 1d texture";
        return false;
    }
    if (data.get_format()->get_nr_dimensions() > 2) {
        render_component::last_error = "cannot replace block in 2d texture with 3d data block";
        return false;
    }
    return ctx.texture_replace(*this,x,y,-1,data,level, palettes);
}
 
bool texture::replace(const context& ctx, int x, int y, int z_or_cube_side, const cgv::data::const_data_view& data, int level, const std::vector<data_view>* palettes)
{
    if (!is_created()) {
        render_component::last_error = "attempt to replace in a not created 1d texture";
        return false;
    }
    bool res = ctx.texture_replace(*this,x,y,z_or_cube_side,data,level, palettes);
    if (res && level == -1 && !have_mipmaps)
        have_mipmaps = true;
    return res;
}
 
bool texture::replace_from_buffer(const context& ctx, int x, int y, int x_buffer,
    int y_buffer, int width, int height, int level)
{
    if (!is_created()) {
        render_component::last_error = "attempt to replace in a not created 1d texture";
        return false;
    }
    if (get_nr_dimensions() != 2) {
        render_component::last_error = "attempt to replace a 2d block in a not 2d texture";
        return false;
    }
    return ctx.texture_replace_from_buffer(*this,x,y,-1,x_buffer,y_buffer,width,height,level);
}
 
bool texture::replace_from_buffer(const context& ctx, int x, int y, int z_or_cube_side, int x_buffer,
        int y_buffer, int width, int height, int level)
{
    if (!is_created()) {
        render_component::last_error = "attempt to replace in a not created texture";
        return false;
    }
    if (tt != TT_3D && tt != TT_CUBEMAP) {
        render_component::last_error = "replacing a 2d block in a slice / cube side of a not 3d texture / cubemap";
        return false;
    }
    return ctx.texture_replace_from_buffer(*this,x,y,z_or_cube_side,x_buffer,y_buffer,width,height,level);
}
 
bool texture::replace_from_image(const context& ctx, const std::string& file_name, int x, int y, int z_or_cube_side, int level)
{
    data_format df;
    data_view dv;
    return replace_from_image(df,dv,ctx,file_name,x,y,z_or_cube_side,level);
}
 
bool texture::replace_from_image(cgv::data::data_format& df, cgv::data::data_view& dv, const context& ctx,
                                 const std::string& file_name, int x, int y, int z_or_cube_side, 
                                 int level)
{
    std::string fn = file_name;
    if (fn.empty()) {
        return false;
    }
    std::vector<data_format> palette_formats;
    image_reader ir(df, &palette_formats);
    if (!ir.read_image(fn, dv))
        return false;
    std::vector<data_view> palettes;
    for (unsigned i=0; i<palette_formats.size(); ++i) {
        palettes.push_back(data_view());
        if (!ir.read_palette(i, palettes.back()))
            return false;
    }
    replace(ctx, x, y, z_or_cube_side, dv, level, &palettes);
    return true;
}
 
 
bool texture::destruct(const context& ctx)
{
    state_out_of_date = true;
    internal_format = 0;
    if(handle != 0)
        return ctx.texture_destruct(*this);
    return true;
}
 
 
bool texture::enable(const context& ctx, int _tex_unit)
{
    if (!handle) {
        render_component::last_error = "attempt to enable texture that is not created";
        return false;
    }
    ensure_state(ctx);
    tex_unit = _tex_unit;
    return ctx.texture_enable(*this, tex_unit, get_nr_dimensions());
}
bool texture::disable(const context& ctx)
{
    return ctx.texture_disable(*this, tex_unit, get_nr_dimensions());
}
 
bool texture::bind_as_image(const context& ctx, int _tex_unit, int level, bool bind_array, int layer, AccessType access) {
    if(!handle) {
        render_component::last_error = "attempt to bind texture that is not created";
        return false;
    }
    ensure_state(ctx);
    tex_unit = _tex_unit;
    //binding_index = ...
 
    return ctx.texture_bind_as_image(*this, tex_unit, level, bind_array, layer, access);
}
 
bool texture::mipmaps_created() const
{
    return have_mipmaps;
}
bool texture::is_enabled() const
{
    return user_data != 0;
}
int texture::get_tex_unit() const
{
    return tex_unit;
}
 
 
    }
}