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#include <daguerre/image.hpp>
#include <cctype>
namespace daguerre {
static unsigned read_int(std::FILE *from) {
unsigned out = 0;
int ch;
do
ch = std::fgetc(from);
while (std::isspace(ch));
while (true) {
if (ch == EOF)
return out;
if (ch < '0' || ch > '9') {
std::ungetc(ch, from);
return out;
}
out = out * 10 + (ch - '0');
ch = std::fgetc(from);
}
}
bool try_load_ppm(std::FILE *from, image<color24> &into) {
if (std::fgetc(from) != 'P' || std::fgetc(from) != '6' ||
std::fgetc(from) != '\n')
return false;
unsigned width = read_int(from);
unsigned height = read_int(from);
unsigned max = read_int(from);
std::fgetc(from);//newline
if (max != 255)
return false;
into = image<color24>(width, height);
color24 *buffer = into.get_buffer();
for (unsigned y = 0; y < height; ++y)
for (unsigned x = 0; x < width; ++x) {
buffer[y * width + x].r = std::fgetc(from);
buffer[y * width + x].g = std::fgetc(from);
buffer[y * width + x].b = std::fgetc(from);
}
return true;
}
}
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