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#include "../include/GtkScaledImage.hpp"
#include <gdkmm/pixbuf.h>
namespace dchat
{
GtkScaledImage::GtkScaledImage(const boost::filesystem::path &filepath)
{
try
{
auto pixbuf = Gdk::Pixbuf::create_from_file(filepath.string());
Cairo::Format format = pixbuf->get_has_alpha() ? Cairo::Format::FORMAT_ARGB32 : Cairo::Format::FORMAT_RGB24;
surface = Cairo::ImageSurface::create(format, pixbuf->get_width(), pixbuf->get_height());
unsigned char *pixels = surface->get_data();
surface->flush();
char *p = (char*)pixbuf->get_pixels();
// TODO: Optimize this
if(format == Cairo::Format::FORMAT_ARGB32)
{
for(int i = 0; i < surface->get_stride() * surface->get_height(); i += 4)
{
pixels[i + 0] = p[i + 2];
pixels[i + 1] = p[i + 1];
pixels[i + 2] = p[i + 0];
pixels[i + 3] = p[i + 3];
}
}
else
{
for(int i = 0; i < surface->get_stride() * surface->get_height(); i += 3)
{
pixels[i + 0] = p[i + 2];
pixels[i + 1] = p[i + 1];
pixels[i + 2] = p[i + 0];
}
}
//memcpy(pixels, textureData, surface->get_stride() * surface->get_height());
surface->mark_dirty();
}
catch(std::exception &e)
{
std::string errMsg = "Failed to create scaled image, reason: ";
errMsg += e.what();
throw GtkScaledImageException(errMsg);
}
}
void GtkScaledImage::draw(const Cairo::RefPtr<Cairo::Context> &cairo, int width, int height, bool circularMask)
{
if(circularMask)
{
int minSize = std::min(width/2, height/2);
cairo->arc(width/2, height/2, minSize, 0.0, 2.0 * M_PI);
cairo->clip();
}
double scaleX = (double)width / (double)surface->get_width();
double scaleY = (double)height / (double)surface->get_height();
cairo->scale(scaleX, scaleY);
cairo->set_source(surface, 0.0, 0.0);
cairo->mask(surface, 0.0, 0.0);
}
}
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