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#include <daguerre.hpp>
namespace daguerre {
image<hilbert_color> get_hilbert_framebuffer() {
uint32_t width, height, pitch;
hilbert_color *ptr = __euler_get_framebuffer(width, height, pitch);
return image<hilbert_color>(ptr, width, height, pitch, false);
}
unsigned read_text_int(std::FILE *input) {
unsigned n = 0;
char ch;
while (true) {
std::fread(&ch, 1, 1, input);
if (ch < '0' || ch > '9')
return n;
n = n * 10 + ch - '0';
}
}
bool try_load_ppm(std::FILE *input, image<rgb24> &into) {
char header[3];
if (std::fread(header, 1, 3, input) != 3)
return false;
if (header[0] != 'P' || header[1] != '6' || header[2] != '\n')
return false;
unsigned width = read_text_int(input);
unsigned height = read_text_int(input);
unsigned max = read_text_int(input);
into = image<rgb24>(width, height);
for (unsigned y = 0; y < height; ++y)
for (unsigned x = 0; x < width; ++x) {
if (std::fread(&into.buffer[y * width + x].r, 1, 1, input) != 1)
return false;
if (std::fread(&into.buffer[y * width + x].g, 1, 1, input) != 1)
return false;
if (std::fread(&into.buffer[y * width + x].b, 1, 1, input) != 1)
return false;
}
if (max != 255)
for (unsigned v = 0; v < width * height; ++v) {
into.buffer[v].r = ((uint16_t)into.buffer[v].r * 255) / max;
into.buffer[v].g = ((uint16_t)into.buffer[v].g * 255) / max;
into.buffer[v].b = ((uint16_t)into.buffer[v].b * 255) / max;
}
return true;
}
}
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