110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
#include <daguerre.hpp>
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namespace daguerre {
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image<hilbert_color> get_hilbert_framebuffer() {
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uint32_t width, height, pitch;
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hilbert_color *ptr = __euler_get_framebuffer(width, height, pitch);
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return image<hilbert_color>(ptr, width, height, pitch, false);
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}
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//TODO: make this more robust
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unsigned read_text_int(std::FILE *input) {
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unsigned n = 0;
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char ch;
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std::fread(&ch, 1, 1, input);
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if (ch == '#') {
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do
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std::fread(&ch, 1, 1, input);
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while (ch != '\n');
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std::fread(&ch, 1, 1, input);
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}
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do {
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n = n * 10 + ch - '0';
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std::fread(&ch, 1, 1, input);
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} while (ch >= '0' && ch <= '9');
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return n;
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}
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//only supports p6 format
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bool try_load_ppm(std::FILE *input, image<rgb24> &into) {
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char header[3];
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if (std::fread(header, 1, 3, input) != 3)
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return false;
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if (header[0] != 'P' || header[1] != '6' || header[2] != '\n')
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return false;
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unsigned width = read_text_int(input);
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unsigned height = read_text_int(input);
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unsigned max = read_text_int(input);
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into = image<rgb24>(width, height);
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for (unsigned y = 0; y < height; ++y)
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for (unsigned x = 0; x < width; ++x) {
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if (std::fread(&into.buffer[y * width + x].r, 1, 1, input) != 1)
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return false;
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if (std::fread(&into.buffer[y * width + x].g, 1, 1, input) != 1)
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return false;
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if (std::fread(&into.buffer[y * width + x].b, 1, 1, input) != 1)
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return false;
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}
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if (max != 255)
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for (unsigned v = 0; v < width * height; ++v) {
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into.buffer[v].r = ((uint16_t)into.buffer[v].r * 255) / max;
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into.buffer[v].g = ((uint16_t)into.buffer[v].g * 255) / max;
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into.buffer[v].b = ((uint16_t)into.buffer[v].b * 255) / max;
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}
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return true;
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}
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//assumes the font is in psf2 format, and has a unicode table
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bool try_load_psf(std::FILE *input, fixed_bitmap_font<bool> &into) {
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uint32_t header[8];
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if (std::fread(header, 4, 8, input) != 8)
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return false;
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const uint32_t glyphs_start = header[2];
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const uint32_t glyph_count = header[4];
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const uint32_t glyph_length = header[5];
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into.height = header[6];
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into.width = header[7];
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const uint32_t unicode_start = glyphs_start + glyph_count * glyph_length;
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std::fseek(input, unicode_start, SEEK_SET);
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uint32_t indices[128];
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for (uint32_t index = 0; index < glyph_count; ++index) {
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uint8_t ch;
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std::fread(&ch, 1, 1, input);
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if (ch < 128)
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indices[ch] = index;
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do
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std::fread(&ch, 1, 1, input);
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while (ch != 0xff);
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}
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for (uint8_t ch = 0; ch < 128; ++ch) {
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std::fseek(input, glyphs_start + glyph_length * indices[ch], SEEK_SET);
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into.glyphs[ch] = image<bool>(into.width, into.height);
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for (unsigned h = 0; h < into.height; ++h)
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for (unsigned wb = 0; wb < into.width; wb += 8) {
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uint8_t byte;
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std::fread(&byte, 1, 1, input);
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for (unsigned x = 0; x < 8 && wb + x < into.width; ++x)
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into.glyphs[ch].set(wb + x, h, (byte >> (7 - x)) & 1);
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}
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}
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return true;
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}
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}
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