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Fix for #6614- use background_color, improve anti-aliasing (#6618)

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This commit is contained in:
Clyde Stubbs
2024-04-26 07:00:01 +10:00
committed by GitHub
parent 2fa5846893
commit 0662c5e0fb
2 changed files with 18 additions and 14 deletions
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17
esphome/components/font/font.cpp
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@@ -129,7 +129,13 @@ void Font::print(int x_start, int y_start, display::Display *display, Color colo
uint8_t bitmask = 0;
uint8_t pixel_data = 0;
float bpp_max = (1 << this->bpp_) - 1;
uint8_t bpp_max = (1 << this->bpp_) - 1;
auto diff_r = (float) color.r - (float) background.r;
auto diff_g = (float) color.g - (float) background.g;
auto diff_b = (float) color.b - (float) background.b;
auto b_r = (float) background.r;
auto b_g = (float) background.g;
auto b_b = (float) background.g;
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; glyph_x++) {
uint8_t pixel = 0;
@@ -146,12 +152,9 @@ void Font::print(int x_start, int y_start, display::Display *display, Color colo
if (pixel == bpp_max) {
display->draw_pixel_at(glyph_x, glyph_y, color);
} else if (pixel != 0) {
float on = (float) pixel / bpp_max;
float off = 1.0 - on;
Color blended;
blended.r = color.r * on + background.r * off;
blended.g = color.r * on + background.g * off;
blended.b = color.r * on + background.b * off;
auto on = (float) pixel / (float) bpp_max;
auto blended =
Color((uint8_t) (diff_r * on + b_r), (uint8_t) (diff_g * on + b_g), (uint8_t) (diff_b * on + b_b));
display->draw_pixel_at(glyph_x, glyph_y, blended);
}
}