1 files changed, 131 insertions, 0 deletions
diff --git a/libraries/daguerre/include/daguerre.hpp b/libraries/daguerre/include/daguerre.hpp
new file mode 100644
index 0000000..274e257
--- /dev/null
+++ b/libraries/daguerre/include/daguerre.hpp
@@ -0,0 +1,131 @@
+#pragma once
+
+#include <stdint.h>
+#include <cstdio>
+
+namespace daguerre {
+
+  typedef uint32_t hilbert_color;
+
+  struct rgb24 {
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+  };
+
+  template <class to_type, class from_type>
+  to_type convert_color(const from_type &from);
+
+  template <>
+  inline hilbert_color convert_color<hilbert_color, rgb24>(const rgb24 &from) {
+    return __euler_encode_color(from.r, from.g, from.b);
+  }
+
+  template <class color_t>
+  class image {
+
+  public:
+    bool delete_buffer_on_destruct;
+    color_t *buffer;
+    unsigned width;
+    unsigned height;
+    unsigned pitch;//in sizeof(color_t)
+
+    image()
+    : delete_buffer_on_destruct(false), buffer(0), width(0), height(0),
+      pitch(0) {}
+
+    image(unsigned width, unsigned height)
+    : delete_buffer_on_destruct(true), buffer(new color_t[width * height]),
+      width(width), height(height), pitch(width) {}
+
+    image(
+      color_t *buffer, unsigned width, unsigned height, unsigned pitch,
+      bool delete_buffer_on_destruct)
+    : delete_buffer_on_destruct(delete_buffer_on_destruct), buffer(buffer),
+      width(width), height(height), pitch(pitch) {}
+
+    ~image() {
+      if (delete_buffer_on_destruct && buffer)
+        delete[] buffer;
+    }
+
+    image(const image<color_t> &other) = delete;
+
+    image(image<color_t> &&other)
+    : delete_buffer_on_destruct(other.delete_buffer_on_destruct),
+      buffer(other.buffer), width(other.width), height(other.height),
+      pitch(other.pitch) {
+      other.buffer = 0;
+    }
+
+    image<color_t> &operator =(const image<color_t> &other) = delete;
+
+    image<color_t> &operator =(image<color_t> &&other) {
+      if (delete_buffer_on_destruct && buffer)
+        delete[] buffer;
+      delete_buffer_on_destruct = other.delete_buffer_on_destruct;
+      buffer = other.buffer;
+      width = other.width;
+      height = other.height;
+      pitch = other.pitch;
+      other.buffer = 0;
+      return *this;
+    }
+
+    color_t get(unsigned x, unsigned y) const {
+      return buffer[y * pitch + x];
+    }
+
+    void set(unsigned x, unsigned y, const color_t &c) {
+      buffer[y * pitch + x] = c;
+    }
+
+  };
+
+  //it is assumed that the regions do not overlap in memory.
+  //copies into [to_x, to_x + width) x [to_y, to_y + height)
+  //from [from_x, from_x + width) x [from_y, from_y + height).
+  template <class color_t>
+  void copy_region(
+    image<color_t> &to, const image<color_t> &from, unsigned from_x,
+    unsigned from_y, unsigned to_x, unsigned to_y, unsigned width,
+    unsigned height) {
+
+    color_t *to_start = to.buffer + to.pitch * to_y + to_x;
+    const color_t *from_start = from.buffer + from.pitch * from_y + from_x;
+
+    for (unsigned y = 0; y < height; ++y)
+      memcpy(
+        to_start + to.pitch * y, from_start + from.pitch * y,
+        width * sizeof(color_t));
+
+  }
+
+  //it is assumed that the regions do not overlap in memory.
+  //copies into [to_x, to_x + width) x [to_y, to_y + height)
+  //from [from_x, from_x + width) x [from_y, from_y + height).
+  template <
+    class to_color_t, class from_color_t,
+    to_color_t converter(const from_color_t &) =
+      convert_color<to_color_t, from_color_t>>
+  void copy_region(
+    image<to_color_t> &to, const image<from_color_t> &from, unsigned from_x,
+    unsigned from_y, unsigned to_x, unsigned to_y, unsigned width,
+    unsigned height) {
+
+    to_color_t *to_start = to.buffer + to.pitch * to_y + to_x;
+    const from_color_t *from_start =
+      from.buffer + from.pitch * from_y + from_x;
+
+    for (unsigned y = 0; y < height; ++y)
+      for (unsigned x = 0; x < width; ++x)
+        to_start[to.pitch * y + x] = converter(from_start[from.pitch * y + x]);
+
+  }
+
+  image<hilbert_color> get_hilbert_framebuffer();
+
+  bool try_load_ppm(std::FILE *input, image<rgb24> &into);
+
+}