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#include "image.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdint.h>
#include <hugin.hpp>
#include "resource.h"
#include "lodepng/lodepng.h"
GUI::Image::Image(const char* data, size_t size)
{
load(data, size);
}
GUI::Image::Image(std::string filename)
{
GUI::Resource rc(filename);
load(rc.data(), rc.size());
}
GUI::Image::~Image()
{
free(image_data);
}
void GUI::Image::setError(int err)
{
GUI::Resource rc(":png_error");
const unsigned char *p = (const unsigned char *)rc.data();
uint32_t iw, ih;
memcpy(&iw, p, sizeof(uint32_t)); p += sizeof(uint32_t);
memcpy(&ih, p, sizeof(uint32_t)); p += sizeof(uint32_t);
w = iw;
h = ih;
DEBUG(image, "w:%d, h:%d\n", (int)w, (int)h);
image_data = (unsigned char*)malloc(rc.size() - 8);
memcpy(image_data, p, rc.size() - 8);
}
void GUI::Image::load(const char* data, size_t size)
{
unsigned iw, ih;
unsigned res = lodepng_decode32((unsigned char**)&image_data, &iw, &ih,
(const unsigned char*)data, size);
w = iw;
h = ih;
if(res != 0) {
ERR(image, "[read_png_file] Error during init_io");
setError(3);
return;
}
}
size_t GUI::Image::width()
{
return w;
}
size_t GUI::Image::height()
{
return h;
}
GUI::Colour GUI::Image::getPixel(size_t x, size_t y)
{
if(x > width() || y > height()) return GUI::Colour(0,0,0,0);
unsigned char *ptr = &image_data[(x + y * width()) * 4];
float r = ptr[0];
float g = ptr[1];
float b = ptr[2];
float a = ptr[3];
GUI::Colour c(r / 255.0,
g / 255.0,
b / 255.0,
a / 255.0);
return c;
}
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