esphome 2023.8.3

components/rasterfont/__init__.py

@@ -1,6 +1,5 @@
 # coding=utf-8
 from esphome import core
-from esphome.components import display
 import esphome.config_validation as cv
 import esphome.codegen as cg
 from esphome.const import CONF_ID, CONF_GLYPHS, CONF_DATA
@@ -10,13 +9,15 @@ import logging
 
 _LOGGER = logging.getLogger(__name__)
 
+DOMAIN = "font"
 DEPENDENCIES = ['display']
 MULTI_CONF = True
 
-Font = display.display_ns.class_('Font')
+font_ns = cg.esphome_ns.namespace("font")
-Glyph = display.display_ns.class_('Glyph')
-GlyphData = display.display_ns.struct("GlyphData")
 
+Font = font_ns.class_("Font")
+Glyph = font_ns.class_("Glyph")
+GlyphData = font_ns.struct("GlyphData")
 
 def validate_data(value):
     r = type(value)()

components/rasterfont/font.cpp

@@ -0,0 +1,149 @@
+#include "font.h"
+
+#include "esphome/core/hal.h"
+#include "esphome/core/log.h"
+#include "esphome/core/color.h"
+#include "esphome/components/display/display_buffer.h"
+
+namespace esphome {
+namespace font {
+
+static const char *const TAG = "font";
+
+void Glyph::draw(int x_at, int y_start, display::Display *display, Color color) const {
+  int scan_x1, scan_y1, scan_width, scan_height;
+  this->scan_area(&scan_x1, &scan_y1, &scan_width, &scan_height);
+
+  const unsigned char *data = this->glyph_data_->data;
+  const int max_x = x_at + scan_x1 + scan_width;
+  const int max_y = y_start + scan_y1 + scan_height;
+
+  for (int glyph_y = y_start + scan_y1; glyph_y < max_y; glyph_y++) {
+    for (int glyph_x = x_at + scan_x1; glyph_x < max_x; data++, glyph_x += 8) {
+      uint8_t pixel_data = progmem_read_byte(data);
+      const int pixel_max_x = std::min(max_x, glyph_x + 8);
+
+      for (int pixel_x = glyph_x; pixel_x < pixel_max_x && pixel_data; pixel_x++, pixel_data <<= 1) {
+        if (pixel_data & 0x80) {
+          display->draw_pixel_at(pixel_x, glyph_y, color);
+        }
+      }
+    }
+  }
+}
+const char *Glyph::get_char() const { return this->glyph_data_->a_char; }
+bool Glyph::compare_to(const char *str) const {
+  // 1 -> this->char_
+  // 2 -> str
+  for (uint32_t i = 0;; i++) {
+    if (this->glyph_data_->a_char[i] == '\0')
+      return true;
+    if (str[i] == '\0')
+      return false;
+    if (this->glyph_data_->a_char[i] > str[i])
+      return false;
+    if (this->glyph_data_->a_char[i] < str[i])
+      return true;
+  }
+  // this should not happen
+  return false;
+}
+int Glyph::match_length(const char *str) const {
+  for (uint32_t i = 0;; i++) {
+    if (this->glyph_data_->a_char[i] == '\0')
+      return i;
+    if (str[i] != this->glyph_data_->a_char[i])
+      return 0;
+  }
+  // this should not happen
+  return 0;
+}
+void Glyph::scan_area(int *x1, int *y1, int *width, int *height) const {
+  *x1 = this->glyph_data_->offset_x;
+  *y1 = this->glyph_data_->offset_y;
+  *width = this->glyph_data_->width;
+  *height = this->glyph_data_->height;
+}
+
+Font::Font(const GlyphData *data, int data_nr, int baseline, int height) : baseline_(baseline), height_(height) {
+  glyphs_.reserve(data_nr);
+  for (int i = 0; i < data_nr; ++i)
+    glyphs_.emplace_back(&data[i]);
+}
+int Font::match_next_glyph(const char *str, int *match_length) {
+  int lo = 0;
+  int hi = this->glyphs_.size() - 1;
+  while (lo != hi) {
+    int mid = (lo + hi + 1) / 2;
+    if (this->glyphs_[mid].compare_to(str)) {
+      lo = mid;
+    } else {
+      hi = mid - 1;
+    }
+  }
+  *match_length = this->glyphs_[lo].match_length(str);
+  if (*match_length <= 0)
+    return -1;
+  return lo;
+}
+void Font::measure(const char *str, int *width, int *x_offset, int *baseline, int *height) {
+  *baseline = this->baseline_;
+  *height = this->height_;
+  int i = 0;
+  int min_x = 0;
+  bool has_char = false;
+  int x = 0;
+  while (str[i] != '\0') {
+    int match_length;
+    int glyph_n = this->match_next_glyph(str + i, &match_length);
+    if (glyph_n < 0) {
+      // Unknown char, skip
+      if (!this->get_glyphs().empty())
+        x += this->get_glyphs()[0].glyph_data_->width;
+      i++;
+      continue;
+    }
+
+    const Glyph &glyph = this->glyphs_[glyph_n];
+    if (!has_char) {
+      min_x = glyph.glyph_data_->offset_x;
+    } else {
+      min_x = std::min(min_x, x + glyph.glyph_data_->offset_x);
+    }
+    x += glyph.glyph_data_->width + glyph.glyph_data_->offset_x;
+
+    i += match_length;
+    has_char = true;
+  }
+  *x_offset = min_x;
+  *width = x - min_x;
+}
+void Font::print(int x_start, int y_start, display::Display *display, Color color, const char *text) {
+  int i = 0;
+  int x_at = x_start;
+  while (text[i] != '\0') {
+    int match_length;
+    int glyph_n = this->match_next_glyph(text + i, &match_length);
+    if (glyph_n < 0) {
+      // Unknown char, skip
+      ESP_LOGW(TAG, "Encountered character without representation in font: '%c'", text[i]);
+      if (!this->get_glyphs().empty()) {
+        uint8_t glyph_width = this->get_glyphs()[0].glyph_data_->width;
+        display->filled_rectangle(x_at, y_start, glyph_width, this->height_, color);
+        x_at += glyph_width;
+      }
+
+      i++;
+      continue;
+    }
+
+    const Glyph &glyph = this->get_glyphs()[glyph_n];
+    glyph.draw(x_at, y_start, display, color);
+    x_at += glyph.glyph_data_->width + glyph.glyph_data_->offset_x;
+
+    i += match_length;
+  }
+}
+
+}  // namespace font
+}  // namespace esphome

components/rasterfont/font.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include "esphome/core/datatypes.h"
+#include "esphome/core/color.h"
+#include "esphome/components/display/display_buffer.h"
+
+namespace esphome {
+namespace font {
+
+class Font;
+
+struct GlyphData {
+  const char *a_char;
+  const uint8_t *data;
+  int offset_x;
+  int offset_y;
+  int width;
+  int height;
+};
+
+class Glyph {
+ public:
+  Glyph(const GlyphData *data) : glyph_data_(data) {}
+
+  void draw(int x, int y, display::Display *display, Color color) const;
+
+  const char *get_char() const;
+
+  bool compare_to(const char *str) const;
+
+  int match_length(const char *str) const;
+
+  void scan_area(int *x1, int *y1, int *width, int *height) const;
+
+ protected:
+  friend Font;
+
+  const GlyphData *glyph_data_;
+};
+
+class Font : public display::BaseFont {
+ public:
+  /** Construct the font with the given glyphs.
+   *
+   * @param glyphs A vector of glyphs, must be sorted lexicographically.
+   * @param baseline The y-offset from the top of the text to the baseline.
+   * @param bottom The y-offset from the top of the text to the bottom (i.e. height).
+   */
+  Font(const GlyphData *data, int data_nr, int baseline, int height);
+
+  int match_next_glyph(const char *str, int *match_length);
+
+  void print(int x_start, int y_start, display::Display *display, Color color, const char *text) override;
+  void measure(const char *str, int *width, int *x_offset, int *baseline, int *height) override;
+  inline int get_baseline() { return this->baseline_; }
+  inline int get_height() { return this->height_; }
+
+  const std::vector<Glyph, ExternalRAMAllocator<Glyph>> &get_glyphs() const { return glyphs_; }
+
+ protected:
+  std::vector<Glyph, ExternalRAMAllocator<Glyph>> glyphs_;
+  int baseline_;
+  int height_;
+};
+
+}  // namespace font
+}  // namespace esphome