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display: allow to align image with ImageAlign (#4933)

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Kamil Trzciński 2023-06-18 21:24:23 +02:00 committed by GitHub
parent 1a7f121ac6
commit e1b0d86098
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2 changed files with 91 additions and 1 deletions
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31
esphome/components/display/display_buffer.cpp
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@ -311,6 +311,37 @@ void DisplayBuffer::vprintf_(int x, int y, Font *font, Color color, TextAlign al
}
void DisplayBuffer::image(int x, int y, BaseImage *image, Color color_on, Color color_off) {
this->image(x, y, image, ImageAlign::TOP_LEFT, color_on, color_off);
}
void DisplayBuffer::image(int x, int y, BaseImage *image, ImageAlign align, Color color_on, Color color_off) {
auto x_align = ImageAlign(int(align) & (int(ImageAlign::HORIZONTAL_ALIGNMENT)));
auto y_align = ImageAlign(int(align) & (int(ImageAlign::VERTICAL_ALIGNMENT)));
switch (x_align) {
case ImageAlign::RIGHT:
x -= image->get_width();
break;
case ImageAlign::CENTER_HORIZONTAL:
x -= image->get_width() / 2;
break;
case ImageAlign::LEFT:
default:
break;
}
switch (y_align) {
case ImageAlign::BOTTOM:
y -= image->get_height();
break;
case ImageAlign::CENTER_VERTICAL:
y -= image->get_height() / 2;
break;
case ImageAlign::TOP:
default:
break;
}
image->draw(x, y, this, color_on, color_off);
}

61
esphome/components/display/display_buffer.h
View file

@ -74,6 +74,54 @@ enum class TextAlign {
BOTTOM_RIGHT = BOTTOM | RIGHT,
};
/** ImageAlign is used to tell the display class how to position a image. By default
* the coordinates you enter for the image() functions take the upper left corner of the image
* as the "anchor" point. You can customize this behavior to, for example, make the coordinates
* refer to the *center* of the image.
*
* All image alignments consist of an X and Y-coordinate alignment. For the alignment along the X-axis
* these options are allowed:
*
* - LEFT (x-coordinate of anchor point is on left)
* - CENTER_HORIZONTAL (x-coordinate of anchor point is in the horizontal center of the image)
* - RIGHT (x-coordinate of anchor point is on right)
*
* For the Y-Axis alignment these options are allowed:
*
* - TOP (y-coordinate of anchor is on the top of the image)
* - CENTER_VERTICAL (y-coordinate of anchor is in the vertical center of the image)
* - BOTTOM (y-coordinate of anchor is on the bottom of the image)
*
* These options are then combined to create combined TextAlignment options like:
* - TOP_LEFT (default)
* - CENTER (anchor point is in the middle of the image bounds)
* - ...
*/
enum class ImageAlign {
TOP = 0x00,
CENTER_VERTICAL = 0x01,
BOTTOM = 0x02,
LEFT = 0x00,
CENTER_HORIZONTAL = 0x04,
RIGHT = 0x08,
TOP_LEFT = TOP | LEFT,
TOP_CENTER = TOP | CENTER_HORIZONTAL,
TOP_RIGHT = TOP | RIGHT,
CENTER_LEFT = CENTER_VERTICAL | LEFT,
CENTER = CENTER_VERTICAL | CENTER_HORIZONTAL,
CENTER_RIGHT = CENTER_VERTICAL | RIGHT,
BOTTOM_LEFT = BOTTOM | LEFT,
BOTTOM_CENTER = BOTTOM | CENTER_HORIZONTAL,
BOTTOM_RIGHT = BOTTOM | RIGHT,
HORIZONTAL_ALIGNMENT = LEFT | CENTER_HORIZONTAL | RIGHT,
VERTICAL_ALIGNMENT = TOP | CENTER_VERTICAL | BOTTOM
};
enum DisplayType {
DISPLAY_TYPE_BINARY = 1,
DISPLAY_TYPE_GRAYSCALE = 2,
@ -300,12 +348,23 @@ class DisplayBuffer {
*
* @param x The x coordinate of the upper left corner.
* @param y The y coordinate of the upper left corner.
* @param image The image to draw
* @param image The image to draw.
* @param color_on The color to replace in binary images for the on bits.
* @param color_off The color to replace in binary images for the off bits.
*/
void image(int x, int y, BaseImage *image, Color color_on = COLOR_ON, Color color_off = COLOR_OFF);
/** Draw the `image` at [x,y] to the screen.
*
* @param x The x coordinate of the upper left corner.
* @param y The y coordinate of the upper left corner.
* @param image The image to draw.
* @param align The alignment of the image.
* @param color_on The color to replace in binary images for the on bits.
* @param color_off The color to replace in binary images for the off bits.
*/
void image(int x, int y, BaseImage *image, ImageAlign align, Color color_on = COLOR_ON, Color color_off = COLOR_OFF);
#ifdef USE_GRAPH
/** Draw the `graph` with the top-left corner at [x,y] to the screen.
*