1 files changed, 161 insertions, 0 deletions
diff --git a/circuitpython/shared-bindings/gifio/GifWriter.c b/circuitpython/shared-bindings/gifio/GifWriter.c
new file mode 100644
index 0000000..11dd43b
--- /dev/null
+++ b/circuitpython/shared-bindings/gifio/GifWriter.c
@@ -0,0 +1,161 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Jeff Epler for Adafruit Industries
+ *
+ * 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"
+#if MICROPY_VFS
+#include "extmod/vfs.h"
+#endif
+#include "py/runtime.h"
+#include "shared-bindings/gifio/GifWriter.h"
+#include "shared-module/gifio/GifWriter.h"
+#include "shared/runtime/context_manager_helpers.h"
+
+//| class GifWriter:
+//|     def __init__(self, file: Union[typing.BinaryIO, str], width:int, height:int, colorspace: displayio.Colorspace, loop:bool=True, dither:bool=False) -> None:
+//|         """Construct a GifWriter object
+//|
+//|         :param file: Either a file open in bytes mode, or the name of a file to open in bytes mode.
+//|         :param width: The width of the image.  All frames must have the same width.
+//|         :param height: The height of the image.  All frames must have the same height.
+//|         :param colorspace: The colorspace of the image.  All frames must have the same colorspace.  The supported colorspaces are ``RGB565``, ``BGR565``, ``RGB565_SWAPPED``, ``BGR565_SWAPPED``, and ``L8`` (greyscale)
+//|         :param loop: If True, the GIF is marked for looping playback
+//|         :param dither: If True, and the image is in color, a simple ordered dither is applied.
+//|         """
+//|         ...
+//|
+static mp_obj_t gifio_gifwriter_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
+    enum { ARG_file, ARG_width, ARG_height, ARG_colorspace, ARG_loop, ARG_dither };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_file, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = NULL} },
+        { MP_QSTR_width, MP_ARG_INT | MP_ARG_REQUIRED, {.u_int = 0} },
+        { MP_QSTR_height, MP_ARG_INT | MP_ARG_REQUIRED, {.u_int = 0} },
+        { MP_QSTR_colorspace, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = NULL} },
+        { MP_QSTR_loop, MP_ARG_BOOL, { .u_bool = true } },
+        { MP_QSTR_dither, MP_ARG_BOOL, { .u_bool = false } },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    mp_obj_t file = args[ARG_file].u_obj;
+    bool own_file = false;
+    if (mp_obj_is_str(file)) {
+        file = mp_call_function_2(MP_OBJ_FROM_PTR(&mp_builtin_open_obj), file, MP_OBJ_NEW_QSTR(MP_QSTR_wb));
+        own_file = true;
+    }
+
+    gifio_gifwriter_t *self = m_new_obj(gifio_gifwriter_t);
+    self->base.type = &gifio_gifwriter_type;
+    shared_module_gifio_gifwriter_construct(
+        self,
+        file,
+        args[ARG_width].u_int,
+        args[ARG_height].u_int,
+        (displayio_colorspace_t)cp_enum_value(&displayio_colorspace_type, args[ARG_colorspace].u_obj),
+        args[ARG_loop].u_bool,
+        args[ARG_dither].u_bool,
+        own_file);
+
+    return self;
+}
+
+
+//|     def __enter__(self) -> GifWriter:
+//|         """No-op used by Context Managers."""
+//|         ...
+//  Provided by context manager helper.
+
+//|     def __exit__(self) -> None:
+//|         """Automatically deinitializes the hardware when exiting a context. See
+//|         :ref:`lifetime-and-contextmanagers` for more info."""
+//|         ...
+//|
+static mp_obj_t gifio_gifwriter___exit__(size_t n_args, const mp_obj_t *args) {
+    gifio_gifwriter_t *self = MP_OBJ_TO_PTR(args[0]);
+    shared_module_gifio_gifwriter_deinit(self);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(gifio_gifwriter___exit___obj, 4, 4, gifio_gifwriter___exit__);
+
+//|     def deinit(self) -> None:
+//|         """Close the underlying file."""
+//|         ...
+//|
+static mp_obj_t gifio_gifwriter_deinit(mp_obj_t self_in) {
+    gifio_gifwriter_t *self = MP_OBJ_TO_PTR(self_in);
+    shared_module_gifio_gifwriter_deinit(self);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(gifio_gifwriter_deinit_obj, gifio_gifwriter_deinit);
+
+//|     def add_frame(self, bitmap: ReadableBuffer, delay: float = 0.1) -> None:
+//|         """Add a frame to the GIF.
+//|
+//|         :param bitmap: The frame data
+//|         :param delay: The frame delay in seconds.  The GIF format rounds this to the nearest 1/100 second, and the largest permitted value is 655 seconds.
+//|         """
+//|         ...
+static mp_obj_t gifio_gifwriter_add_frame(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_bitmap, ARG_delay };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_bitmap, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = NULL} },
+        { MP_QSTR_delay, MP_ARG_OBJ, {.u_obj = NULL} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    gifio_gifwriter_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+    shared_module_gifio_gifwriter_check_for_deinit(self);
+
+
+    mp_float_t delay = mp_arg_validate_obj_float_non_negative(args[ARG_delay].u_obj, MICROPY_FLOAT_CONST(0.1), MP_QSTR_delay);
+    if (delay > MICROPY_FLOAT_CONST(655.)) {
+        mp_raise_ValueError_varg(translate("%q must be <= %d"), MP_QSTR_delay, 655);
+    }
+
+    int delay_centiseconds = (int)(delay * 100);
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(args[ARG_bitmap].u_obj, &bufinfo, MP_BUFFER_READ);
+    shared_module_gifio_gifwriter_add_frame(self, &bufinfo, delay_centiseconds);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(gifio_gifwriter_add_frame_obj, 1, gifio_gifwriter_add_frame);
+
+STATIC const mp_rom_map_elem_t gifio_gifwriter_locals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_GifWriter) },
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&gifio_gifwriter___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&gifio_gifwriter_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR_add_frame), MP_ROM_PTR(&gifio_gifwriter_add_frame_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(gifio_gifwriter_locals, gifio_gifwriter_locals_table);
+
+const mp_obj_type_t gifio_gifwriter_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_GifWriter,
+    .make_new = gifio_gifwriter_make_new,
+    .locals_dict = (mp_obj_dict_t *)&gifio_gifwriter_locals,
+};