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Code Issues Releases Wiki Activity

[online_image] Support byte_order (#9502)

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This commit is contained in:
Clyde Stubbs
2025-07-15 12:09:18 +10:00
committed by GitHub
parent e3da197adf
commit 8f58ca3a2a
3 changed files with 21 additions and 7 deletions
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16
esphome/components/online_image/online_image.cpp
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@@ -35,14 +35,15 @@ inline bool is_color_on(const Color &color) {
}
OnlineImage::OnlineImage(const std::string &url, int width, int height, ImageFormat format, ImageType type,
image::Transparency transparency, uint32_t download_buffer_size)
image::Transparency transparency, uint32_t download_buffer_size, bool is_big_endian)
: Image(nullptr, 0, 0, type, transparency),
buffer_(nullptr),
download_buffer_(download_buffer_size),
download_buffer_initial_size_(download_buffer_size),
format_(format),
fixed_width_(width),
fixed_height_(height) {
fixed_height_(height),
is_big_endian_(is_big_endian) {
this->set_url(url);
}
@@ -296,7 +297,7 @@ void OnlineImage::draw_pixel_(int x, int y, Color color) {
break;
}
case ImageType::IMAGE_TYPE_GRAYSCALE: {
uint8_t gray = static_cast<uint8_t>(0.2125 * color.r + 0.7154 * color.g + 0.0721 * color.b);
auto gray = static_cast<uint8_t>(0.2125 * color.r + 0.7154 * color.g + 0.0721 * color.b);
if (this->transparency_ == image::TRANSPARENCY_CHROMA_KEY) {
if (gray == 1) {
gray = 0;
@@ -314,8 +315,13 @@ void OnlineImage::draw_pixel_(int x, int y, Color color) {
case ImageType::IMAGE_TYPE_RGB565: {
this->map_chroma_key(color);
uint16_t col565 = display::ColorUtil::color_to_565(color);
this->buffer_[pos + 0] = static_cast<uint8_t>((col565 >> 8) & 0xFF);
this->buffer_[pos + 1] = static_cast<uint8_t>(col565 & 0xFF);
if (this->is_big_endian_) {
this->buffer_[pos + 0] = static_cast<uint8_t>((col565 >> 8) & 0xFF);
this->buffer_[pos + 1] = static_cast<uint8_t>(col565 & 0xFF);
} else {
this->buffer_[pos + 0] = static_cast<uint8_t>(col565 & 0xFF);
this->buffer_[pos + 1] = static_cast<uint8_t>((col565 >> 8) & 0xFF);
}
if (this->transparency_ == image::TRANSPARENCY_ALPHA_CHANNEL) {
this->buffer_[pos + 2] = color.w;
}