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ILI9XXX: Lazily allocate buffer (#6352)

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Clyde Stubbs 2024-03-11 16:52:05 +11:00 committed by GitHub
parent d6bcc465a8
commit c559ccbb83
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GPG key ID: B5690EEEBB952194
2 changed files with 15 additions and 1 deletions
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7
esphome/components/ili9xxx/ili9xxx_display.cpp
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@ -42,7 +42,9 @@ void ILI9XXXDisplay::setup() {
this->y_low_ = this->height_;
this->x_high_ = 0;
this->y_high_ = 0;
}
void ILI9XXXDisplay::alloc_buffer_() {
if (this->buffer_color_mode_ == BITS_16) {
this->init_internal_(this->get_buffer_length_() * 2);
if (this->buffer_ != nullptr) {
@ -107,6 +109,8 @@ void ILI9XXXDisplay::dump_config() {
float ILI9XXXDisplay::get_setup_priority() const { return setup_priority::HARDWARE; }
void ILI9XXXDisplay::fill(Color color) {
if (!this->check_buffer_())
return;
uint16_t new_color = 0;
this->x_low_ = 0;
this->y_low_ = 0;
@ -124,7 +128,6 @@ void ILI9XXXDisplay::fill(Color color) {
// Upper and lower is equal can use quicker memset operation. Takes ~20ms.
memset(this->buffer_, (uint8_t) new_color, buffer_length_16_bits);
} else {
// Slower set of both buffers. Takes ~30ms.
for (uint32_t i = 0; i < buffer_length_16_bits; i = i + 2) {
this->buffer_[i] = (uint8_t) (new_color >> 8);
this->buffer_[i + 1] = (uint8_t) new_color;
@ -144,6 +147,8 @@ void HOT ILI9XXXDisplay::draw_absolute_pixel_internal(int x, int y, Color color)
if (x >= this->get_width_internal() || x < 0 || y >= this->get_height_internal() || y < 0) {
return;
}
if (!this->check_buffer_())
return;
uint32_t pos = (y * width_) + x;
uint16_t new_color;
bool updated = false;

9
esphome/components/ili9xxx/ili9xxx_display.h
View file

@ -86,6 +86,14 @@ class ILI9XXXDisplay : public display::DisplayBuffer,
display::ColorBitness bitness, bool big_endian, int x_offset, int y_offset, int x_pad) override;
protected:
inline bool check_buffer_() {
if (this->buffer_ == nullptr) {
this->alloc_buffer_();
return !this->is_failed();
}
return true;
}
void draw_absolute_pixel_internal(int x, int y, Color color) override;
void setup_pins_();
@ -116,6 +124,7 @@ class ILI9XXXDisplay : public display::DisplayBuffer,
void end_command_();
void start_data_();
void end_data_();
void alloc_buffer_();
GPIOPin *reset_pin_{nullptr};
GPIOPin *dc_pin_{nullptr};