1 files changed, 85 insertions, 0 deletions
diff --git a/shared-bindings/_pixelbuf/__init__.c b/shared-bindings/_pixelbuf/__init__.c
new file mode 100644
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+++ b/shared-bindings/_pixelbuf/__init__.c
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+/*
+ * This file is part of the Circuit Python project, https://github.com/adafruit/circuitpython
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Roy Hooper
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/obj.h"
+#include "py/mphal.h"
+#include "py/runtime.h"
+#include "py/objproperty.h"
+
+#include "shared-bindings/_pixelbuf/__init__.h"
+#include "shared-bindings/_pixelbuf/PixelBuf.h"
+
+
+//| """A fast RGB(W) pixel buffer library for like NeoPixel and DotStar.
+//|
+//| The `_pixelbuf` module provides the :py:class:`PixelBuf` class to accelerate
+//| RGB(W) strip/matrix manipulation, such as DotStar and Neopixel.
+//|
+//| Byteorders are configured with strings, such as "RGB" or "RGBD"."""
+// TODO: Pull in docs from pypixelbuf.
+
+//| def colorwheel(n: int) -> Any:
+//|     """C implementation of the common wheel() function found in many examples.
+//|     Returns the colorwheel RGB value as an integer value for n (usable in :py:class:`PixelBuf`, neopixel, and dotstar)."""
+//|     ...
+//|
+//| def wheel(n: Any) -> Any:
+//|     """Use of wheel() is deprecated. Please use colorwheel()."""
+//|
+
+STATIC mp_obj_t pixelbuf_colorwheel(mp_obj_t n) {
+    return MP_OBJ_NEW_SMALL_INT(colorwheel(MP_OBJ_IS_SMALL_INT(n) ? MP_OBJ_SMALL_INT_VALUE(n) : mp_obj_float_get(n)));
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_colorwheel_obj, pixelbuf_colorwheel);
+
+const int32_t colorwheel(float pos) {
+    if (pos > 255) {
+        pos = pos - ((uint32_t)(pos / 256) * 256);
+    }
+    if (pos < 85)
+        return (uint8_t)(255 - (pos * 3)) << 16 | (uint8_t)(pos * 3) << 8;
+    else if (pos < 170) {
+        pos -= 85;
+        return (uint8_t)(255 - (pos * 3)) << 8 | (uint8_t)(pos * 3);
+    } else {
+        pos -= 170;
+        return (uint8_t)(pos * 3) << 16 | (uint8_t)(255 - (pos * 3));
+    }
+}
+
+STATIC const mp_rom_map_elem_t pixelbuf_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR__pixelbuf) },
+    { MP_ROM_QSTR(MP_QSTR_PixelBuf), MP_ROM_PTR(&pixelbuf_pixelbuf_type) },
+    { MP_ROM_QSTR(MP_QSTR_wheel), MP_ROM_PTR(&pixelbuf_colorwheel_obj) },
+    { MP_ROM_QSTR(MP_QSTR_colorwheel), MP_ROM_PTR(&pixelbuf_colorwheel_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(pixelbuf_module_globals, pixelbuf_module_globals_table);
+
+const mp_obj_module_t pixelbuf_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&pixelbuf_module_globals,
+};