Flags for background color configuration

CMakeLists.txt

@@ -9,6 +9,7 @@ set(SOURCES
 	src/options.c
 	src/mouse.c
 	src/strtoint.c
+	src/strtocolor.c
 	src/editing_area/main.c
 	src/editing_area/level.c
 	src/editing_area/draw.c

README

@@ -59,7 +59,7 @@ These flags are boolean toggles. They take no option.
 -verbose : print debug informations to the standard output
 -create : create an empty level instead of reading from the -level path
 
-All these flags take integers as argument.
+These flags take integers as argument.
 -tile-width
 -tile-height
 -level-width : used by -create
@@ -72,6 +72,11 @@ All these flags take integers as argument.
 -picker-target-fps
 -picker-padding
 
+These flags take colors as argument.
+Color format : #RRGGBB or RRGGBB
+-editor-bg-color
+-picker-bg-color
+
 Example aliases
 ---------------
 By using the flags, it's very easy to create specific configurations.
@@ -90,7 +95,8 @@ alias sle-cg='sle -tile-width 16 -tile-height 16 -level-width 25 \
 # fx-9860G configuration
 alias sle-fx='sle -tile-width 8 -tile-height 8 -level-width 16 \
   -level-height 8 -editor-width 128 -editor-height 64 \
-  -editor-off-x 0 -editor-off-y 0'
+  -editor-off-x 0 -editor-off-y 0 -editor-bg-color #b0b0b0 \
+  -picker-bg-color #b0b0b0'
 
 DEFAULT CONFIGURATION
 =====================

include/options.h

@@ -2,6 +2,8 @@
 /* Copyright (C) 2021 KikooDX */
 #pragma once
 
+#include <raylib.h>
+
 #define BUFFER_SIZE 256
 
 struct Options {
@@ -18,8 +20,10 @@ struct Options {
 	int editor_target_fps;
 	int editor_draw_offset_x;
 	int editor_draw_offset_y;
+	Color editor_bg_color;
 	int picker_target_fps;
 	int picker_padding;
+	Color picker_bg_color;
 	/* determined after previous options */
 	int tileset_width;
 	int tileset_height;

include/strtocolor.h

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* Copyright (C) 2021 KikooDX */
+#pragma once
+
+#include <raylib.h>
+
+/* Attempt to convert a string to a raylib Color. */
+Color strtocolor(char *string);

src/editing_area/main.c

@@ -61,7 +61,7 @@ int editing_area_main(struct Options options,
 		/* draw */
 		BeginDrawing();
 
-		ClearBackground(EDITOR_BACKGROUND_COLOR);
+		ClearBackground(options.editor_bg_color);
 		level_draw(level, options, tileset);
 		editor_mouse_draw(options, mouse_x, mouse_y);
 

src/main.c

@@ -5,6 +5,7 @@
 #include "info.h"
 #include "options.h"
 #include "shared_data.h"
+#include "strtocolor.h"
 #include "strtoint.h"
 #include "tile_picker/main.h"
 #include <getopt.h>
@@ -105,8 +106,10 @@ static void process_arguments(int argc, char **argv,
 		    {"editor-fps", required_argument, 0, 'f'},
 		    {"editor-off-x", required_argument, 0, 'o'},
 		    {"editor-off-y", required_argument, 0, 'O'},
+		    {"editor-bg-color", required_argument, 0, 'b'},
 		    {"picker-fps", required_argument, 0, 'F'},
 		    {"picker-padding", required_argument, 0, 'p'},
+		    {"picker-bg-color", required_argument, 0, 'B'},
 		    {0, 0, 0, 0},
 		};
 		/* getopt_long stores the option index here */
@@ -157,6 +160,9 @@ static void process_arguments(int argc, char **argv,
 			options->editor_draw_offset_y =
 			    strtoint(optarg);
 			break;
+		case 'b': /* editor background color */
+			options->editor_bg_color = strtocolor(optarg);
+			break;
 		case 'F': /* picker target FPS */
 			options->picker_target_fps =
 			    int_arg_min(opt, 1);
@@ -164,6 +170,9 @@ static void process_arguments(int argc, char **argv,
 		case 'p': /* picker padding */
 			options->picker_padding = int_arg_min(opt, 0);
 			break;
+		case 'B': /* picker background color */
+			options->picker_bg_color = strtocolor(optarg);
+			break;
 		case '?':
 			/* getopt_long already printed an error message
 			 */

src/options.c

@@ -17,10 +17,12 @@ struct Options options_defaults(void)
 	    .editor_target_fps = EDITOR_TARGET_FPS,
 	    .editor_draw_offset_x = EDITOR_DRAW_OFFSET_X,
 	    .editor_draw_offset_y = EDITOR_DRAW_OFFSET_Y,
+	    .editor_bg_color = EDITOR_BACKGROUND_COLOR,
 	    .picker_window_width = 0,
 	    .picker_window_height = 0,
 	    .picker_target_fps = PICKER_TARGET_FPS,
 	    .picker_padding = PICKER_PADDING,
+	    .picker_bg_color = PICKER_BACKGROUND_COLOR,
 	    .level_create = 0,
 	};
 }

src/strtocolor.c

@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/* Copyright (C) 2021 KikooDX */
+
+#include "strtocolor.h"
+#include "info.h"
+#include <raylib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const int hex_table_size = 16;
+static const int hex_table[hex_table_size] = {
+    '0', '1', '2', '3', '4', '5', '6', '7',
+    '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
+static const char *format_error =
+    "ERROR: flag expected a color argument in the form #RRGGBB, got "
+    "\"%s\"\n";
+
+/* Attempt to convert a string to raylib Color. */
+Color strtocolor(char *string)
+{
+	int rgb[3] = {0, 0, 0};
+	char *character = string + (string[0] == '#');
+	const size_t string_len = strlen(character);
+	int i = 0;
+	int sum = 0;
+
+	if (string_len != 6) {
+		fprintf(stderr, format_error, string);
+		exit(EXIT_FAILURE);
+	}
+
+	while (*character != '\0') {
+		int value = -1;
+		int j;
+		for (j = 0; j < hex_table_size; j += 1) {
+			if (hex_table[j] == *character) {
+				value = j;
+				break;
+			}
+		}
+		if (value == -1) {
+			fprintf(stderr, format_error, string);
+			exit(EXIT_FAILURE);
+		}
+		sum += value * (1 + 15 * (i % 2));
+		INFO_VAR("%d", sum);
+		if (i % 2) {
+			rgb[i / 2] = sum;
+			sum = 0;
+		}
+		i += 1;
+		character += 1;
+	}
+	INFO_VAR("r=%d", rgb[0]);
+	INFO_VAR("g=%d", rgb[1]);
+	INFO_VAR("b=%d", rgb[2]);
+	return (Color){rgb[0], rgb[1], rgb[2], 255};
+}

src/strtoint.c

@@ -9,9 +9,9 @@
 /* Attempt to convert a string to integer. */
 int strtoint(char *string)
 {
-	char character;
-	int i;
 	const size_t string_len = strlen(string);
+	int character;
+	int i;
 	int sum = 0;
 	int multiplier = 1;
 	int negative = string[0] == '-';

src/tile_picker/main.c

@@ -42,7 +42,7 @@ int tile_picker_main(struct Options options,
 			/* draw */
 			BeginDrawing();
 
-			ClearBackground(PICKER_BACKGROUND_COLOR);
+			ClearBackground(options.picker_bg_color);
 			tileset_draw(tileset, options,
 			             shared_data->selected_tile);