Be a good c-tizen and split paper.h into header and implementation

main/CMakeLists.txt

@@ -1,2 +1,6 @@
-idf_component_register(SRCS "inkpot.c"
+idf_component_register(
-                    INCLUDE_DIRS ".")
+  SRCS
+    "inkpot.c"
+    "paper.c"
+  INCLUDE_DIRS "."
+)

main/paper.c

@@ -0,0 +1,309 @@
+#include "paper.h"
+
+// this file defines lua bindings to the epdiy e-ink library.
+//
+// see https://epdiy.readthedocs.io/en/latest/api.html for epdiy documentation.
+// see https://www.lua.org/manual/5.4/manual.html for lua documentation.
+
+EpdiyHighlevelState hl;
+uint8_t* fb;
+
+static int init (lua_State *L) {
+    epd_init(&epd_board_lilygo_t5_47, &ED047TC1, EPD_LUT_64K);
+    // epd_set_vcom(1560);
+    hl = epd_hl_init(WAVEFORM);
+    epd_set_rotation(EPD_ROT_LANDSCAPE);
+    fb = epd_hl_get_framebuffer(&hl);
+    return 0;
+}
+
+static int clear (lua_State *L){
+    epd_clear();
+    return 0;
+}
+
+static int get_width (lua_State *L) {
+    int width = epd_rotated_display_width();
+    lua_pushnumber(L, width);
+    return 1;
+}
+
+static int get_height (lua_State *L) {
+    int height = epd_rotated_display_height();
+    lua_pushnumber(L, height);
+    return 1;
+}
+
+static int set_rotation (lua_State *L) {
+    char *rotation = lua_tostring(L, -1);
+    luaL_argcheck(
+        L,
+        strcmp(rotation, "landscape") == 0 ||
+        strcmp(rotation, "portrait") == 0 ||
+        strcmp(rotation, "inverted_landscape") == 0 ||
+        strcmp(rotation, "inverted_portrait") == 0,
+        1,
+        "expected `rotation` to be either 'landscape', 'portrait', 'inverted_landscape' or 'inverted_portrait'"
+    );
+    epd_set_rotation(
+        strcmp(rotation, "landscape") == 0
+        ? EPD_ROT_LANDSCAPE
+        : strcmp(rotation, "portrait") == 0
+        ? EPD_ROT_PORTRAIT
+        : strcmp(rotation, "inverted_landscape") == 0
+        ? EPD_ROT_INVERTED_LANDSCAPE
+        : EPD_ROT_INVERTED_PORTRAIT
+    );
+    return 0;
+}
+
+static int get_rotation (lua_State *L) {
+    int rotation = epd_get_rotation();
+    lua_pushstring(
+        L,
+        rotation == EPD_ROT_LANDSCAPE
+        ? "landscape"
+        : rotation == EPD_ROT_PORTRAIT
+        ? "portrait"
+        : rotation == EPD_ROT_INVERTED_LANDSCAPE
+        ? "inverted_landscape"
+        : "inverted_portrait"
+    );
+    return 1;
+}
+
+static int draw_pixel (lua_State *L) {
+    int x, y, color;
+    int isnum;
+
+    x = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
+    y = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
+    color = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 3, "expected `color` to be a number within [0, 255]");
+
+    epd_draw_pixel(x, y, color, fb);
+    return 0;
+}
+
+static int draw_line (lua_State *L) {
+    int x1, y1, x2, y2, color;
+    int isnum;
+
+    x1 = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
+    y1 = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
+    x2 = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
+    y2 = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
+    color = lua_tonumberx(L, 5, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 5, "expected `color` to be a number within [0, 255]");
+
+    epd_draw_line(x1, y1, x2, y2, color, fb);
+    return 0;
+}
+
+static int draw_hline (lua_State *L) {
+    int x, y, length, color;
+    int isnum;
+
+    x = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
+    y = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
+    length = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `length` to be a number");
+    color = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
+
+    epd_draw_hline(x, y, length, color, fb);
+    return 0;
+}
+
+static int draw_vline (lua_State *L) {
+    int x, y, length, color;
+    int isnum;
+
+    x = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
+    y = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
+    length = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `length` to be a number");
+    color = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
+
+    epd_draw_vline(x, y, length, color, fb);
+    return 0;
+}
+
+static int draw_circle (lua_State *L) {
+    int x, y, radius, color;
+    int isnum;
+
+    x = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
+    y = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
+    radius = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `radius` to be a number");
+    color = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
+
+    epd_draw_circle(x, y, radius, color, fb);
+    return 0;
+}
+
+static int fill_circle (lua_State *L) {
+    int x, y, radius, color;
+    int isnum;
+
+    x = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
+    y = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
+    radius = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `radius` to be a number");
+    color = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
+
+    epd_fill_circle(x, y, radius, color, fb);
+    return 0;
+}
+
+static int draw_rect (lua_State *L) {
+    int x1, y1, x2, y2, color;
+    int isnum;
+
+    x1 = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
+    y1 = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
+    x2 = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
+    y2 = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
+    color = lua_tonumberx(L, 5, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 5, "expected `color` to be a number within [0, 255]");
+
+    EpdRect rect = {
+        .x = x1,
+        .y = y1,
+        .width = x2 - x1,
+        .height = y2 - y1
+    };
+    epd_draw_rect(rect, color, fb);
+    return 0;
+}
+
+static int fill_rect (lua_State *L) {
+    int x1, y1, x2, y2, color;
+    int isnum;
+
+    x1 = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
+    y1 = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
+    x2 = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
+    y2 = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
+    color = lua_tonumberx(L, 5, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 5, "expected `color` to be a number within [0, 255]");
+
+    EpdRect rect = {
+        .x = x1,
+        .y = y1,
+        .width = x2 - x1,
+        .height = y2 - y1
+    };
+    epd_fill_rect(rect, color, fb);
+    return 0;
+}
+
+static int draw_triangle (lua_State *L) {
+    int x1, y1, x2, y2, x3, y3, color;
+    int isnum;
+
+    x1 = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
+    y1 = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
+    x2 = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
+    y2 = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
+    x3 = lua_tonumberx(L, 5, &isnum);
+    luaL_argcheck(L, isnum, 5, "expected `x3` to be a number");
+    y3 = lua_tonumberx(L, 6, &isnum);
+    luaL_argcheck(L, isnum, 6, "expected `y3` to be a number");
+    color = lua_tonumberx(L, 7, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 7, "expected `color` to be a number within [0, 255]");
+
+    epd_draw_triangle(x1, y1, x2, y2, x3, y3, color, fb);
+    return 0;
+}
+
+static int fill_triangle (lua_State *L) {
+    int x1, y1, x2, y2, x3, y3, color;
+    int isnum;
+
+    x1 = lua_tonumberx(L, 1, &isnum);
+    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
+    y1 = lua_tonumberx(L, 2, &isnum);
+    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
+    x2 = lua_tonumberx(L, 3, &isnum);
+    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
+    y2 = lua_tonumberx(L, 4, &isnum);
+    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
+    x3 = lua_tonumberx(L, 5, &isnum);
+    luaL_argcheck(L, isnum, 5, "expected `x3` to be a number");
+    y3 = lua_tonumberx(L, 6, &isnum);
+    luaL_argcheck(L, isnum, 6, "expected `y3` to be a number");
+    color = lua_tonumberx(L, 7, &isnum);
+    luaL_argcheck(L, isnum && color >= 0 && color < 256, 7, "expected `color` to be a number within [0, 255]");
+
+    epd_fill_triangle(x1, y1, x2, y2, x3, y3, color, fb);
+    return 0;
+}
+
+static int update (lua_State *L) {
+    int temperature = 25;
+    epd_poweron();
+    epd_hl_update_screen(&hl, MODE_GC16, temperature);
+    epd_poweroff();
+    return 0;
+}
+
+static const struct luaL_Reg paper[] = {
+  {"init", init},
+  {"clear", clear},
+
+  {"get_width", get_width},
+  {"get_height", get_height},
+
+  {"set_rotation", set_rotation},
+  {"get_rotation", get_rotation},
+
+  {"draw_pixel", draw_pixel},
+  {"draw_line", draw_line},
+  {"draw_hline", draw_hline},
+  {"draw_vline", draw_vline},
+  {"draw_circle", draw_circle},
+  {"fill_circle", fill_circle},
+  {"draw_rect", draw_rect},
+  {"fill_rect", fill_rect},
+  {"draw_triangle", draw_triangle},
+  {"fill_triangle", fill_triangle},
+  {"update", update},
+
+  {NULL, NULL},
+};
+
+int luaopen_paper (lua_State *L) {
+    luaL_newlib(L, paper);
+    return 1;
+}

main/paper.h

@@ -1,321 +1,16 @@
 #ifndef PAPER_H_
 #define PAPER_H_
 
+#include <string.h>
 #include <lua.h>
 #include <lauxlib.h>
 
 #include <epdiy.h>
-#include "departure_mono_11.h"
+// #include "departure_mono_11.h"
-#include "departure_mono_22.h"
+// #include "departure_mono_22.h"
 
 #define WAVEFORM EPD_BUILTIN_WAVEFORM
 
-// this file defines lua bindings to the epdiy e-ink library.
+int luaopen_paper (lua_State *L);
-//
-// see https://epdiy.readthedocs.io/en/latest/api.html for epdiy documentation.
-// see https://www.lua.org/manual/5.4/manual.html for lua documentation.
-
-EpdiyHighlevelState hl;
-uint8_t* fb;
-
-static int init (lua_State *L) {
-    epd_init(&epd_board_lilygo_t5_47, &ED047TC1, EPD_LUT_64K);
-    // epd_set_vcom(1560);
-    hl = epd_hl_init(WAVEFORM);
-    epd_set_rotation(EPD_ROT_LANDSCAPE);
-    fb = epd_hl_get_framebuffer(&hl);
-    return 0;
-}
-
-static int clear (lua_State *L){
-    epd_clear();
-    return 0;
-}
-
-static int get_width (lua_State *L) {
-    int width = epd_rotated_display_width();
-    lua_pushnumber(L, width);
-    return 1;
-}
-
-static int get_height (lua_State *L) {
-    int height = epd_rotated_display_height();
-    lua_pushnumber(L, height);
-    return 1;
-}
-
-static int set_rotation (lua_State *L) {
-    char *rotation = lua_tostring(L, -1);
-    luaL_argcheck(
-        L,
-        strcmp(rotation, "landscape") == 0 ||
-        strcmp(rotation, "portrait") == 0 ||
-        strcmp(rotation, "inverted_landscape") == 0 ||
-        strcmp(rotation, "inverted_portrait") == 0,
-        1,
-        "expected `rotation` to be either 'landscape', 'portrait', 'inverted_landscape' or 'inverted_portrait'"
-    );
-    epd_set_rotation(
-        strcmp(rotation, "landscape") == 0
-        ? EPD_ROT_LANDSCAPE
-        : strcmp(rotation, "portrait") == 0
-        ? EPD_ROT_PORTRAIT
-        : strcmp(rotation, "inverted_landscape") == 0
-        ? EPD_ROT_INVERTED_LANDSCAPE
-        : EPD_ROT_INVERTED_PORTRAIT
-    );
-    return 0;
-}
-
-static int get_rotation (lua_State *L) {
-    int rotation = epd_get_rotation();
-    lua_pushstring(
-        L,
-        rotation == EPD_ROT_LANDSCAPE
-        ? "landscape"
-        : rotation == EPD_ROT_PORTRAIT
-        ? "portrait"
-        : rotation == EPD_ROT_INVERTED_LANDSCAPE
-        ? "inverted_landscape"
-        : "inverted_portrait"
-    );
-    return 1;
-}
-
-static int draw_pixel (lua_State *L) {
-    int x, y, color;
-    int isnum;
-
-    x = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
-    y = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
-    color = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 3, "expected `color` to be a number within [0, 255]");
-
-    epd_draw_pixel(x, y, color, fb);
-    return 0;
-}
-
-static int draw_line (lua_State *L) {
-    int x1, y1, x2, y2, color;
-    int isnum;
-
-    x1 = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
-    y1 = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
-    x2 = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
-    y2 = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
-    color = lua_tonumberx(L, 5, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 5, "expected `color` to be a number within [0, 255]");
-
-    epd_draw_line(x1, y1, x2, y2, color, fb);
-    return 0;
-}
-
-static int draw_hline (lua_State *L) {
-    int x, y, length, color;
-    int isnum;
-
-    x = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
-    y = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
-    length = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `length` to be a number");
-    color = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
-
-    epd_draw_hline(x, y, length, color, fb);
-    return 0;
-}
-
-static int draw_vline (lua_State *L) {
-    int x, y, length, color;
-    int isnum;
-
-    x = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
-    y = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
-    length = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `length` to be a number");
-    color = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
-
-    epd_draw_vline(x, y, length, color, fb);
-    return 0;
-}
-
-static int draw_circle (lua_State *L) {
-    int x, y, radius, color;
-    int isnum;
-
-    x = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
-    y = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
-    radius = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `radius` to be a number");
-    color = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
-
-    epd_draw_circle(x, y, radius, color, fb);
-    return 0;
-}
-
-static int fill_circle (lua_State *L) {
-    int x, y, radius, color;
-    int isnum;
-
-    x = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x` to be a number");
-    y = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y` to be a number");
-    radius = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `radius` to be a number");
-    color = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 4, "expected `color` to be a number within [0, 255]");
-
-    epd_fill_circle(x, y, radius, color, fb);
-    return 0;
-}
-
-static int draw_rect (lua_State *L) {
-    int x1, y1, x2, y2, color;
-    int isnum;
-
-    x1 = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
-    y1 = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
-    x2 = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
-    y2 = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
-    color = lua_tonumberx(L, 5, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 5, "expected `color` to be a number within [0, 255]");
-
-    EpdRect rect = {
-        .x = x1,
-        .y = y1,
-        .width = x2 - x1,
-        .height = y2 - y1
-    };
-    epd_draw_rect(rect, color, fb);
-    return 0;
-}
-
-static int fill_rect (lua_State *L) {
-    int x1, y1, x2, y2, color;
-    int isnum;
-
-    x1 = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
-    y1 = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
-    x2 = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
-    y2 = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
-    color = lua_tonumberx(L, 5, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 5, "expected `color` to be a number within [0, 255]");
-
-    EpdRect rect = {
-        .x = x1,
-        .y = y1,
-        .width = x2 - x1,
-        .height = y2 - y1
-    };
-    epd_fill_rect(rect, color, fb);
-    return 0;
-}
-
-static int draw_triangle (lua_State *L) {
-    int x1, y1, x2, y2, x3, y3, color;
-    int isnum;
-
-    x1 = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
-    y1 = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
-    x2 = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
-    y2 = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
-    x3 = lua_tonumberx(L, 5, &isnum);
-    luaL_argcheck(L, isnum, 5, "expected `x3` to be a number");
-    y3 = lua_tonumberx(L, 6, &isnum);
-    luaL_argcheck(L, isnum, 6, "expected `y3` to be a number");
-    color = lua_tonumberx(L, 7, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 7, "expected `color` to be a number within [0, 255]");
-
-    epd_draw_triangle(x1, y1, x2, y2, x3, y3, color, fb);
-    return 0;
-}
-
-static int fill_triangle (lua_State *L) {
-    int x1, y1, x2, y2, x3, y3, color;
-    int isnum;
-
-    x1 = lua_tonumberx(L, 1, &isnum);
-    luaL_argcheck(L, isnum, 1, "expected `x1` to be a number");
-    y1 = lua_tonumberx(L, 2, &isnum);
-    luaL_argcheck(L, isnum, 2, "expected `y1` to be a number");
-    x2 = lua_tonumberx(L, 3, &isnum);
-    luaL_argcheck(L, isnum, 3, "expected `x2` to be a number");
-    y2 = lua_tonumberx(L, 4, &isnum);
-    luaL_argcheck(L, isnum, 4, "expected `y2` to be a number");
-    x3 = lua_tonumberx(L, 5, &isnum);
-    luaL_argcheck(L, isnum, 5, "expected `x3` to be a number");
-    y3 = lua_tonumberx(L, 6, &isnum);
-    luaL_argcheck(L, isnum, 6, "expected `y3` to be a number");
-    color = lua_tonumberx(L, 7, &isnum);
-    luaL_argcheck(L, isnum && color >= 0 && color < 256, 7, "expected `color` to be a number within [0, 255]");
-
-    epd_fill_triangle(x1, y1, x2, y2, x3, y3, color, fb);
-    return 0;
-}
-
-static int update (lua_State *L) {
-    int temperature = 25;
-    epd_poweron();
-    epd_hl_update_screen(&hl, MODE_GC16, temperature);
-    epd_poweroff();
-    return 0;
-}
-
-static const struct luaL_Reg paper[] = {
-  {"init", init},
-  {"clear", clear},
-
-  {"get_width", get_width},
-  {"get_height", get_height},
-
-  {"set_rotation", set_rotation},
-  {"get_rotation", get_rotation},
-
-  {"draw_pixel", draw_pixel},
-  {"draw_line", draw_line},
-  {"draw_hline", draw_hline},
-  {"draw_vline", draw_vline},
-  {"draw_circle", draw_circle},
-  {"fill_circle", fill_circle},
-  {"draw_rect", draw_rect},
-  {"fill_rect", fill_rect},
-  {"draw_triangle", draw_triangle},
-  {"fill_triangle", fill_triangle},
-  {"update", update},
-
-  {NULL, NULL},
-};
-
-int luaopen_paper (lua_State *L) {
-    luaL_newlib(L, paper);
-    return 1;
-}
 
 #endif // PAPER_H_