1 files changed, 107 insertions, 0 deletions
diff --git a/Marlin/src/lcd/tft/tft_string.h b/Marlin/src/lcd/tft/tft_string.h
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+++ b/Marlin/src/lcd/tft/tft_string.h
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include <stdint.h>
+
+extern const uint8_t ISO10646_1_5x7[];
+extern const uint8_t font10x20[];
+
+extern const uint8_t Helvetica12Bold[];
+
+extern const uint8_t Helvetica14[], Helvetica14_symbols[];
+extern const uint8_t Helvetica18[], Helvetica18_symbols[];
+
+#define NO_GLYPH          0xFF
+
+typedef struct __attribute__((__packed__)) {
+  uint8_t Format;
+  uint8_t BBXWidth;
+  uint8_t BBXHeight;
+   int8_t BBXOffsetX;
+   int8_t BBXOffsetY;
+  uint8_t CapitalAHeight;
+ uint16_t Encoding65Pos;
+ uint16_t Encoding97Pos;
+  uint8_t FontStartEncoding;
+  uint8_t FontEndEncoding;
+   int8_t LowerGDescent;
+   int8_t FontAscent;
+   int8_t FontDescent;
+   int8_t FontXAscent;
+   int8_t FontXDescent;
+} font_t;
+
+typedef struct __attribute__((__packed__)) {
+  uint8_t BBXWidth;
+  uint8_t BBXHeight;
+  uint8_t DataSize;
+   int8_t DWidth;
+   int8_t BBXOffsetX;
+   int8_t BBXOffsetY;
+} glyph_t;
+
+#define MAX_STRING_LENGTH   64
+
+class TFT_String {
+  private:
+    static glyph_t *glyphs[256];
+    static font_t *font_header;
+
+    static uint8_t data[MAX_STRING_LENGTH + 1];
+    static uint16_t span;   // in pixels
+    static uint8_t length;  // in characters
+
+    static void add_character(uint8_t character);
+    static void eol() { data[length] = 0x00; }
+
+  public:
+    static void set_font(const uint8_t *font);
+    static void add_glyphs(const uint8_t *font);
+
+    static font_t *font() { return font_header; };
+    static uint16_t font_height() { return font_header->FontAscent - font_header->FontDescent; }
+    static glyph_t *glyph(uint8_t character) { return glyphs[character] ?: glyphs[0x3F]; }  /* Use '?' for unknown glyphs */
+    static inline glyph_t *glyph(uint8_t *character) { return glyph(*character); }
+
+    static void set();
+    static void add(uint8_t character) { add_character(character); eol(); }
+    static void add(uint8_t *string, uint8_t max_len=MAX_STRING_LENGTH);
+    static void add(uint8_t *string, int8_t index, uint8_t *itemString=nullptr);
+    static void set(uint8_t *string) { set(); add(string); };
+    static void set(uint8_t *string, int8_t index, const char *itemString=nullptr) { set(); add(string, index, (uint8_t *)itemString); };
+    static inline void set(const char *string) { set((uint8_t *)string); }
+    static inline void set(const char *string, int8_t index, const char *itemString=nullptr) { set((uint8_t *)string, index, itemString); }
+    static inline void add(const char *string) { add((uint8_t *)string); }
+
+    static void trim(uint8_t character=0x20);
+    static void rtrim(uint8_t character=0x20);
+    static void ltrim(uint8_t character=0x20);
+
+    static void truncate(uint8_t maxlen) { if (length > maxlen) { length = maxlen; eol(); } }
+
+    static uint16_t width() { return span; }
+    static uint8_t *string() { return data; }
+    static uint16_t center(uint16_t width) { return span > width ? 0 : (width - span) / 2; }
+};
+
+extern TFT_String tft_string;