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Refactor font creation to save stack (#1707)
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parent
8d8d421286
commit
063d9c47a4
5 changed files with 80 additions and 43 deletions
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@ -19,6 +19,7 @@ from esphome.cpp_generator import ( # noqa
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Statement,
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LineComment,
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progmem_array,
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static_const_array,
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statement,
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variable,
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new_variable,
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@ -170,7 +170,7 @@ void DisplayBuffer::print(int x, int y, Font *font, Color color, TextAlign align
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// Unknown char, skip
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ESP_LOGW(TAG, "Encountered character without representation in font: '%c'", text[i]);
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if (!font->get_glyphs().empty()) {
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uint8_t glyph_width = font->get_glyphs()[0].width_;
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uint8_t glyph_width = font->get_glyphs()[0].glyph_data_->width;
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for (int glyph_x = 0; glyph_x < glyph_width; glyph_x++)
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for (int glyph_y = 0; glyph_y < height; glyph_y++)
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this->draw_pixel_at(glyph_x + x_at, glyph_y + y_start, color);
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@ -193,7 +193,7 @@ void DisplayBuffer::print(int x, int y, Font *font, Color color, TextAlign align
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}
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}
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x_at += glyph.width_ + glyph.offset_x_;
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x_at += glyph.glyph_data_->width + glyph.glyph_data_->offset_x;
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i += match_length;
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}
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@ -345,35 +345,27 @@ void DisplayBuffer::strftime(int x, int y, Font *font, const char *format, time:
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}
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#endif
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Glyph::Glyph(const char *a_char, const uint8_t *data_start, uint32_t offset, int offset_x, int offset_y, int width,
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int height)
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: char_(a_char),
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data_(data_start + offset),
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offset_x_(offset_x),
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offset_y_(offset_y),
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width_(width),
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height_(height) {}
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bool Glyph::get_pixel(int x, int y) const {
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const int x_data = x - this->offset_x_;
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const int y_data = y - this->offset_y_;
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if (x_data < 0 || x_data >= this->width_ || y_data < 0 || y_data >= this->height_)
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const int x_data = x - this->glyph_data_->offset_x;
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const int y_data = y - this->glyph_data_->offset_y;
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if (x_data < 0 || x_data >= this->glyph_data_->width || y_data < 0 || y_data >= this->glyph_data_->height)
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return false;
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const uint32_t width_8 = ((this->width_ + 7u) / 8u) * 8u;
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const uint32_t width_8 = ((this->glyph_data_->width + 7u) / 8u) * 8u;
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const uint32_t pos = x_data + y_data * width_8;
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return pgm_read_byte(this->data_ + (pos / 8u)) & (0x80 >> (pos % 8u));
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return pgm_read_byte(this->glyph_data_->data + (pos / 8u)) & (0x80 >> (pos % 8u));
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}
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const char *Glyph::get_char() const { return this->char_; }
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const char *Glyph::get_char() const { return this->glyph_data_->a_char; }
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bool Glyph::compare_to(const char *str) const {
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// 1 -> this->char_
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// 2 -> str
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for (uint32_t i = 0;; i++) {
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if (this->char_[i] == '\0')
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if (this->glyph_data_->a_char[i] == '\0')
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return true;
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if (str[i] == '\0')
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return false;
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if (this->char_[i] > str[i])
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if (this->glyph_data_->a_char[i] > str[i])
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return false;
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if (this->char_[i] < str[i])
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if (this->glyph_data_->a_char[i] < str[i])
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return true;
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}
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// this should not happen
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@ -381,19 +373,19 @@ bool Glyph::compare_to(const char *str) const {
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}
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int Glyph::match_length(const char *str) const {
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for (uint32_t i = 0;; i++) {
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if (this->char_[i] == '\0')
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if (this->glyph_data_->a_char[i] == '\0')
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return i;
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if (str[i] != this->char_[i])
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if (str[i] != this->glyph_data_->a_char[i])
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return 0;
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}
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// this should not happen
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return 0;
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}
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void Glyph::scan_area(int *x1, int *y1, int *width, int *height) const {
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*x1 = this->offset_x_;
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*y1 = this->offset_y_;
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*width = this->width_;
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*height = this->height_;
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*x1 = this->glyph_data_->offset_x;
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*y1 = this->glyph_data_->offset_y;
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*width = this->glyph_data_->width;
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*height = this->glyph_data_->height;
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}
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int Font::match_next_glyph(const char *str, int *match_length) {
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int lo = 0;
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@ -423,17 +415,17 @@ void Font::measure(const char *str, int *width, int *x_offset, int *baseline, in
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if (glyph_n < 0) {
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// Unknown char, skip
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if (!this->get_glyphs().empty())
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x += this->get_glyphs()[0].width_;
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x += this->get_glyphs()[0].glyph_data_->width;
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i++;
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continue;
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}
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const Glyph &glyph = this->glyphs_[glyph_n];
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if (!has_char)
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min_x = glyph.offset_x_;
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min_x = glyph.glyph_data_->offset_x;
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else
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min_x = std::min(min_x, x + glyph.offset_x_);
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x += glyph.width_ + glyph.offset_x_;
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min_x = std::min(min_x, x + glyph.glyph_data_->offset_x);
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x += glyph.glyph_data_->width + glyph.glyph_data_->offset_x;
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i += match_length;
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has_char = true;
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@ -442,8 +434,10 @@ void Font::measure(const char *str, int *width, int *x_offset, int *baseline, in
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*width = x - min_x;
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}
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const std::vector<Glyph> &Font::get_glyphs() const { return this->glyphs_; }
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Font::Font(std::vector<Glyph> &&glyphs, int baseline, int bottom)
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: glyphs_(std::move(glyphs)), baseline_(baseline), bottom_(bottom) {}
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Font::Font(const GlyphData *data, int data_nr, int baseline, int bottom) : baseline_(baseline), bottom_(bottom) {
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for (int i = 0; i < data_nr; ++i)
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glyphs_.emplace_back(data + i);
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}
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bool Image::get_pixel(int x, int y) const {
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if (x < 0 || x >= this->width_ || y < 0 || y >= this->height_)
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@ -338,10 +338,18 @@ class DisplayPage {
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DisplayPage *next_{nullptr};
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};
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struct GlyphData {
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const char *a_char;
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const uint8_t *data;
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int offset_x;
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int offset_y;
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int width;
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int height;
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};
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class Glyph {
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public:
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Glyph(const char *a_char, const uint8_t *data_start, uint32_t offset, int offset_x, int offset_y, int width,
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int height);
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Glyph(const GlyphData *data) : glyph_data_(data) {}
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bool get_pixel(int x, int y) const;
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@ -357,12 +365,7 @@ class Glyph {
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friend Font;
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friend DisplayBuffer;
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const char *char_;
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const uint8_t *data_;
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int offset_x_;
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int offset_y_;
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int width_;
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int height_;
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const GlyphData *glyph_data_;
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};
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class Font {
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@ -373,7 +376,7 @@ class Font {
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* @param baseline The y-offset from the top of the text to the baseline.
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* @param bottom The y-offset from the top of the text to the bottom (i.e. height).
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*/
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Font(std::vector<Glyph> &&glyphs, int baseline, int bottom);
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Font(const GlyphData *data, int data_nr, int baseline, int bottom);
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int match_next_glyph(const char *str, int *match_length);
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@ -12,6 +12,7 @@ MULTI_CONF = True
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Font = display.display_ns.class_("Font")
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Glyph = display.display_ns.class_("Glyph")
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GlyphData = display.display_ns.struct("GlyphData")
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def validate_glyphs(value):
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@ -75,6 +76,7 @@ DEFAULT_GLYPHS = (
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' !"%()+,-.:/0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz°'
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)
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CONF_RAW_DATA_ID = "raw_data_id"
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CONF_RAW_GLYPH_ID = "raw_glyph_id"
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FONT_SCHEMA = cv.Schema(
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{
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@ -83,6 +85,7 @@ FONT_SCHEMA = cv.Schema(
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cv.Optional(CONF_GLYPHS, default=DEFAULT_GLYPHS): validate_glyphs,
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cv.Optional(CONF_SIZE, default=20): cv.int_range(min=1),
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cv.GenerateID(CONF_RAW_DATA_ID): cv.declare_id(cg.uint8),
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cv.GenerateID(CONF_RAW_GLYPH_ID): cv.declare_id(GlyphData),
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}
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)
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@ -120,8 +123,25 @@ def to_code(config):
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rhs = [HexInt(x) for x in data]
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prog_arr = cg.progmem_array(config[CONF_RAW_DATA_ID], rhs)
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glyphs = []
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glyph_initializer = []
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for glyph in config[CONF_GLYPHS]:
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glyphs.append(Glyph(glyph, prog_arr, *glyph_args[glyph]))
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glyph_initializer.append(
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cg.StructInitializer(
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GlyphData,
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("a_char", glyph),
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(
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"data",
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cg.RawExpression(str(prog_arr) + " + " + str(glyph_args[glyph][0])),
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),
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("offset_x", glyph_args[glyph][1]),
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("offset_y", glyph_args[glyph][2]),
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("width", glyph_args[glyph][3]),
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("height", glyph_args[glyph][4]),
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)
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)
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cg.new_Pvariable(config[CONF_ID], glyphs, ascent, ascent + descent)
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glyphs = cg.static_const_array(config[CONF_RAW_GLYPH_ID], glyph_initializer)
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cg.new_Pvariable(
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config[CONF_ID], glyphs, len(glyph_initializer), ascent, ascent + descent
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)
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@ -411,6 +411,16 @@ class ProgmemAssignmentExpression(AssignmentExpression):
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return f"static const {self.type} {self.name}[] PROGMEM = {self.rhs}"
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class StaticConstAssignmentExpression(AssignmentExpression):
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__slots__ = ()
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def __init__(self, type_, name, rhs, obj):
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super().__init__(type_, "", name, rhs, obj)
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def __str__(self):
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return f"static const {self.type} {self.name}[] = {self.rhs}"
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def progmem_array(id_, rhs) -> "MockObj":
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rhs = safe_exp(rhs)
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obj = MockObj(id_, ".")
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return obj
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def static_const_array(id_, rhs) -> "MockObj":
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rhs = safe_exp(rhs)
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obj = MockObj(id_, ".")
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assignment = StaticConstAssignmentExpression(id_.type, id_, rhs, obj)
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CORE.add(assignment)
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CORE.register_variable(id_, obj)
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return obj
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def statement(expression: Union[Expression, Statement]) -> Statement:
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"""Convert expression into a statement unless is already a statement."""
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if isinstance(expression, Statement):
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