58 lines
1.6 KiB
C++
58 lines
1.6 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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unsigned read_text_int(std::FILE *input) {
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unsigned n = 0;
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char ch;
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while (true) {
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std::fread(&ch, 1, 1, input);
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if (ch < '0' || ch > '9')
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return n;
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n = n * 10 + ch - '0';
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}
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}
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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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}
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