From b1a912a8a6ff472a49b2e0a09cfd433adfc2cb24 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Sat, 18 May 2024 21:53:38 -0400
Subject: reorganization, cross compiler

---
 libraries/daguerre/source/daguerre.cpp | 58 ++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 libraries/daguerre/source/daguerre.cpp

(limited to 'libraries/daguerre/source/daguerre.cpp')

diff --git a/libraries/daguerre/source/daguerre.cpp b/libraries/daguerre/source/daguerre.cpp
new file mode 100644
index 0000000..fb3ddc7
--- /dev/null
+++ b/libraries/daguerre/source/daguerre.cpp
@@ -0,0 +1,58 @@
+#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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