Add MLX42 V2

MLX42/src/font/mlx_font.c

@@ -0,0 +1,80 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        ::::::::            */
+/*   mlx_font.c                                         :+:    :+:            */
+/*                                                     +:+                    */
+/*   By: W2Wizard <w2.wizzard@gmail.com>              +#+                     */
+/*                                                   +#+                      */
+/*   Created: 2022/02/22 12:01:37 by W2Wizard      #+#    #+#                 */
+/*   Updated: 2022/06/27 19:53:36 by lde-la-h      ########   odam.nl         */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "font.h"
+#include "MLX42/MLX42_Int.h"
+
+//= Private =//
+
+/**
+ * Does the actual copying of pixels form the atlas buffer to the
+ * image buffer.
+ * 
+ * Skips any non-printable characters.
+ * 
+ * @param image The image to draw on.
+ * @param texture The font_atlas.
+ * @param texoffset The character texture X offset.
+ * @param imgoffset The image X offset.
+ */
+static void mlx_draw_char(mlx_image_t* image, int32_t texoffset, int32_t imgoffset)
+{
+	if (texoffset < 0)
+		return;
+
+	char* pixelx;
+	uint8_t* pixeli;
+	for (uint32_t y = 0; y < FONT_HEIGHT; y++)
+	{
+		pixelx = &font_atlas.pixels[(y * font_atlas.width + texoffset) * BPP];
+		pixeli = image->pixels + ((y * image->width + imgoffset) * BPP);
+		memcpy(pixeli, pixelx, FONT_WIDTH * BPP);
+	}
+}
+
+//= Public =//
+
+const mlx_texture_t* mlx_get_font(void)
+{
+    return ((const mlx_texture_t*)&font_atlas);
+}
+
+int32_t mlx_get_texoffset(char c)
+{
+    const bool _isprint = isprint(c);
+
+    // NOTE: Cheesy branchless operation :D
+    // +2 To skip line separator in texture
+    return (-1 * !_isprint + ((FONT_WIDTH + 2) * (c - 32)) * _isprint);
+}
+
+mlx_image_t* mlx_put_string(mlx_t* mlx, const char* str, int32_t x, int32_t y)
+{
+	MLX_NONNULL(mlx);
+	MLX_NONNULL(str);
+
+	mlx_image_t* strimage;
+	const size_t len = strlen(str);
+	if (len > MLX_MAX_STRING)
+		return ((void*)mlx_error(MLX_STRTOOBIG));	
+	if (!(strimage = mlx_new_image(mlx, len * FONT_WIDTH, FONT_HEIGHT)))
+		return (NULL);
+
+	// Draw the text itself
+	int32_t imgoffset = 0;
+	for (size_t i = 0; i < len; i++, imgoffset += FONT_WIDTH)
+		mlx_draw_char(strimage, mlx_get_texoffset(str[i]), imgoffset);
+
+	if (mlx_image_to_window(mlx, strimage, x, y) == -1)
+		return (mlx_delete_image(mlx, strimage), NULL);
+	return (strimage);
+}