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Display: Introduce draw_pixels_at() method for fast block display rendering (#6034)

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* Introduce `draw_pixels_at()` method for fast block display rendering

* Add check for 18 vs 16 bit display.
This commit is contained in:
Clyde Stubbs
2024-01-02 10:34:40 +11:00
committed by GitHub
parent 773cd0f414
commit ae52164d9c
4 changed files with 96 additions and 0 deletions
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esphome/components/ili9xxx/ili9xxx_display.cpp
+29
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@@ -276,6 +276,35 @@ void ILI9XXXDisplay::display_() {
this->y_high_ = 0;
}
// note that this bypasses the buffer and writes directly to the display.
void ILI9XXXDisplay::draw_pixels_at(int x_start, int y_start, int w, int h, const uint8_t *ptr,
display::ColorOrder order, display::ColorBitness bitness, bool big_endian,
int x_offset, int y_offset, int x_pad) {
if (w <= 0 || h <= 0)
return;
// if color mapping or software rotation is required, hand this off to the parent implementation. This will
// do color conversion pixel-by-pixel into the buffer and draw it later. If this is happening the user has not
// configured the renderer well.
if (this->rotation_ != display::DISPLAY_ROTATION_0_DEGREES || bitness != display::COLOR_BITNESS_565 || !big_endian ||
this->is_18bitdisplay_) {
return display::Display::draw_pixels_at(x_start, y_start, w, h, ptr, order, bitness, big_endian, x_offset, y_offset,
x_pad);
}
this->enable();
this->set_addr_window_(x_start, y_start, x_start + w - 1, y_start + h - 1);
// x_ and y_offset are offsets into the source buffer, unrelated to our own offsets into the display.
if (x_offset == 0 && x_pad == 0 && y_offset == 0) {
// we could deal here with a non-zero y_offset, but if x_offset is zero, y_offset probably will be so don't bother
this->write_array(ptr, w * h * 2);
} else {
auto stride = x_offset + w + x_pad;
for (size_t y = 0; y != h; y++) {
this->write_array(ptr + (y + y_offset) * stride + x_offset, w * 2);
}
}
this->disable();
}
// should return the total size: return this->get_width_internal() * this->get_height_internal() * 2 // 16bit color
// values per bit is huge
uint32_t ILI9XXXDisplay::get_buffer_length_() { return this->get_width_internal() * this->get_height_internal(); }