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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);
}
//TODO: make this more robust
unsigned read_text_int(std::FILE *input) {
unsigned n = 0;
char ch;
std::fread(&ch, 1, 1, input);
if (ch == '#') {
do
std::fread(&ch, 1, 1, input);
while (ch != '\n');
std::fread(&ch, 1, 1, input);
}
do {
n = n * 10 + ch - '0';
std::fread(&ch, 1, 1, input);
} while (ch >= '0' && ch <= '9');
return n;
}
//only supports p6 format
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;
}
//assumes the font is in psf2 format, and has a unicode table
bool try_load_psf(std::FILE *input, fixed_bitmap_font<bool> &into) {
uint32_t header[8];
if (std::fread(header, 4, 8, input) != 8)
return false;
const uint32_t glyphs_start = header[2];
const uint32_t glyph_count = header[4];
const uint32_t glyph_length = header[5];
into.height = header[6];
into.width = header[7];
const uint32_t unicode_start = glyphs_start + glyph_count * glyph_length;
std::fseek(input, unicode_start, SEEK_SET);
uint32_t indices[128];
for (uint32_t index = 0; index < glyph_count; ++index) {
uint8_t ch;
std::fread(&ch, 1, 1, input);
if (ch < 128)
indices[ch] = index;
do
std::fread(&ch, 1, 1, input);
while (ch != 0xff);
}
for (uint8_t ch = 0; ch < 128; ++ch) {
std::fseek(input, glyphs_start + glyph_length * indices[ch], SEEK_SET);
into.glyphs[ch] = image<bool>(into.width, into.height);
for (unsigned h = 0; h < into.height; ++h)
for (unsigned wb = 0; wb < into.width; wb += 8) {
uint8_t byte;
std::fread(&byte, 1, 1, input);
for (unsigned x = 0; x < 8 && wb + x < into.width; ++x)
into.glyphs[ch].set(wb + x, h, (byte >> (7 - x)) & 1);
}
}
return true;
}
}
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