GdkCRNPixbuf.cpp

Go to the documentation of this file.

/* Copyright 2010-2016 CoReNum, INSA-Lyon
 *
 * This file is part of libgtkcrnmm.
 *
 * libgtkcrnmm is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * libgtkcrnmm 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with libgtkcrnmm.  If not, see <http://www.gnu.org/licenses/>.
 *
 * file: GdkCRNPixbuf.cpp
 * \author Yann LEYDIER
 */

#include <libgtkcrnmm_config.h>
#include <GdkCRNPixbuf.h>
#include <CRNStringUTF8.h>
#include <CRNIO/CRNPath.h>
#include <CRNi18n.h>

using namespace crn;

static Glib::RefPtr<Gdk::Pixbuf> pixbufFromCRNImageRGB(const ImageRGB &img)
{
    Glib::RefPtr<Gdk::Pixbuf> pb(Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, false, 8, int(img.GetWidth()), int(img.GetHeight())));
    size_t offset = 0;
    int offsetpb = 0;
    guint8 *pix = pb->get_pixels();
    for (size_t y = 0; y < img.GetHeight(); y++)
    {
        int pto = offsetpb;
        for (size_t x = 0; x < img.GetWidth(); x++)
        {
            pix[pto++] = img.At(offset).r;
            pix[pto++] = img.At(offset).g;
            pix[pto++] = img.At(offset++).b;
        }
        offsetpb += pb->get_rowstride();
    }
    return pb;
}

static Glib::RefPtr<Gdk::Pixbuf> pixbufFromCRNImageGray(const ImageGray &img)
{
    Glib::RefPtr<Gdk::Pixbuf> pb(Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, false, 8, int(img.GetWidth()), int(img.GetHeight())));
    size_t offset = 0;
    int offsetpb = 0;
    guint8 *pix = pb->get_pixels();
    for (size_t y = 0; y < img.GetHeight(); y++)
    {
        int pto = offsetpb;
        for (size_t x = 0; x < img.GetWidth(); x++)
        {
            uint8_t v = img.At(offset++);
            pix[pto++] = v;
            pix[pto++] = v;
            pix[pto++] = v;
        }
        offsetpb += pb->get_rowstride();
    }
    return pb;
}

static Glib::RefPtr<Gdk::Pixbuf> pixbufFromCRNImageBW(const ImageBW &img)
{
    Glib::RefPtr<Gdk::Pixbuf> pb(Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, false, 8, int(img.GetWidth()), int(img.GetHeight())));
    size_t offset = 0;
    int offsetpb = 0;
    guint8 *pix = pb->get_pixels();
    for (size_t y = 0; y < img.GetHeight(); y++)
    {
        int pto = offsetpb;
        for (size_t x = 0; x < img.GetWidth(); x++)
        {
            uint8_t v = img.At(offset++) ? 255 : 0;
            pix[pto++] = v;
            pix[pto++] = v;
            pix[pto++] = v;
        }
        offsetpb += pb->get_rowstride();
    }
    return pb;
}

Glib::RefPtr<Gdk::Pixbuf> GdkCRN::PixbufFromCRNImage(const ImageBase &img)
{
    try
    {
        return pixbufFromCRNImageRGB(dynamic_cast<const ImageRGB&>(img));
    }
    catch (...) {}
    try
    {
        return pixbufFromCRNImageGray(dynamic_cast<const ImageGray&>(img));
    }
    catch (...) {}
    try
    {
        return pixbufFromCRNImageBW(dynamic_cast<const ImageBW&>(img));
    }
    catch (...) {}
    throw ExceptionInvalidArgument(crn::StringUTF8("GdkCRN::PixbufFromCRNImage(const ImageBase &img): ") + _("unsupported pixel format."));
}

Glib::RefPtr<Gdk::Pixbuf> GdkCRN::PixbufFromFile(const Path &p)
{
#ifdef _MSC_VER
    auto ext = p.GetExtension();
    ext.ToLower();
    if (ext == "png" || ext == "jpeg" || ext == "jpg")
        return GdkCRN::PixbufFromCRNImage(*NewImageFromFile(p));
    else
        return Gdk::Pixbuf::create_from_file(p.CStr());
#else
    return Gdk::Pixbuf::create_from_file(p.CStr());
#endif
}

ImageRGB GdkCRN::CRNImageFromPixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pb)
{
    if (!pb)
    {
        throw ExceptionInvalidArgument(StringUTF8("SImage SImageFromPixbuf(const Glib::RefPtr<Gdk::Pixbuf> &pb): ") + _("Null pixbuf given."));
    }
    guint8 *pix = pb->get_pixels();
    auto imgrgb = ImageRGB(pb->get_width(), pb->get_height());
    int offset = 0;
    int offsetpb = 0;
    int alpha = pb->get_has_alpha() ? 1 : 0;
    for (size_t y = 0; y < imgrgb.GetHeight(); y++)
    {
        int tpo = offsetpb;
        for (size_t x = 0; x < imgrgb.GetWidth(); x++)
        {
            tpo += alpha;
            imgrgb.At(offset).r = pix[tpo++];
            imgrgb.At(offset).g = pix[tpo++];
            imgrgb.At(offset++).b = pix[tpo++];
        }
        offsetpb += pb->get_rowstride();
    }
    return imgrgb;
}

#ifdef CRN_USING_GTKMM3

Gdk::RGBA GdkCRN::ColorFromCRNPixel(const crn::pixel::RGB8 &p)
{
    Gdk::RGBA col;
    col.set_rgba(p.r / 255.0, p.g / 255.0, p.b / 255.0);
    return col;
}

crn::pixel::RGB8 GdkCRN::CRNPixelRGBFromGdkColor(const Gdk::RGBA &color)
{
    return crn::pixel::RGB8(uint8_t(color.get_red() * 255), uint8_t(color.get_green() * 255), uint8_t(color.get_blue() * 255));
}

#else

Gdk::Color GdkCRN::ColorFromCRNPixel(const crn::pixel::RGB8 &p)
{
    Gdk::Color col;
    col.set_rgb_p(p.r / 255.0, p.g / 255.0, p.b / 255.0);
    return col;
}

crn::pixel::RGB8 GdkCRN::CRNPixelRGBFromGdkColor(const Gdk::Color &color)
{
    return crn::pixel::RGB8(uint8_t(color.get_red_p() * 255), uint8_t(color.get_green_p() * 255), uint8_t(color.get_blue_p() * 255));
}
#endif