6Motion - Draw Image from Web

Drawing an image from the web on Inkplate 6MOTION is simple using the draw function, which supports multiple image formats.

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Supported formats: JPG, BMP, and PNG.

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JPG files without progressive encoding are supported.

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If you experience issues displaying an image, try re-saving it with an image editing program. The issue is usually related to the image format.

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Drawing an Image from a URL

Let's draw this image of the Eurodom building in Osijek, Croatia on Inkplate 6MOTION:

Example image by @filipbaotic on Pexels

// Ensure Inkplate is connected to the internet
const char * imageUrl = "docs.inkplate.com/img/sample_image.jpg";
// Draw the image using Floyd-Steinberg dither kernel
if (!inkplate.image.draw(imageUrl, 0, 0, false, 1, FS_KERNEL, FS_KERNEL_SIZE))
{
    // Show error on the screen if decoding fails
    inkplate.println("Image download or decode failed!");
    inkplate.printf("Decode Err: %d\r\n", inkplate.image.getError());
}
// Show the result on the display
inkplate.partialUpdate();

inkplate.image.draw()

Loads an image from the microSD card or web, decodes it, and stores it in the ePaper framebuffer. Supports optional dithering, color inversion, and format/path specification.

Returns value: Returns true if the image was successfully loaded into the framebuffer, otherwise false. Use ImageDecoder::getError() for failure details.

Function parameters:

Type	Name	Description
const char*	_path	Path and filename of the image. Can be a URL (for web images) or a file path (on the microSD card).
int	_x	X-coordinate of the image's upper-left corner in the framebuffer.
int	_y	Y-coordinate of the image's upper-left corner in the framebuffer.
bool	_invert	If true, inverts colors.
uint8_t	_dither	Dithering mode: 0 (disabled), 1 (enabled).
const KernelElement*	_ditherKernelParameters	Dithering kernel to be used. Options: FS_KERNEL (Floyd-Steinberg), STUCKI_KERNEL, SIERRA_KERNEL, SIERRA_LITE_KERNEL, ATKINSON_KERNEL, BURKES_KERNEL.
size_t	_ditherKernelParametersSize	Size of the selected dithering kernel, e.g., FS_KERNEL_SIZE.
enum InkplateImageDecodeFormat	_format	Optional. Forces a specific image format if automatic detection fails.
enum InkplateImagePathType	_pathType	Optional. Forces a specific image source (web or microSD card).

In case of an error, you can use getError():

inkplate.image.getError()

Retrieves the last error encountered while decoding an image using ImageDecoder::draw(). Errors are cleared before each decoding process.

Returns value: Returns an InkplateImageDecodeErrors enum value representing the last encountered error.

Enum Value	Description
INKPLATE_IMAGE_DECODE_NO_ERR	No error
INKPLATE_IMAGE_DECODE_ERR_BAD_PARAM	Invalid parameter
INKPLATE_IMAGE_DECODE_ERR_UNKNOWN_FORMAT	Unknown image format
INKPLATE_IMAGE_DECODE_ERR_FILE_OPEN_FAIL	Failed to open image file
INKPLATE_IMAGE_DECODE_ERR_NO_MEMORY	Not enough memory for decoding
INKPLATE_IMAGE_DECODE_ERR_BMP_DECODER_FAULT	BMP decoder error
INKPLATE_IMAGE_DECODE_ERR_JPG_DECODER_FAULT	JPG decoder error
INKPLATE_IMAGE_DECODE_ERR_PNG_DECODER_FAULT	PNG decoder error
INKPLATE_IMAGE_DECODE_ERR_BMP_HARD_FAULT	Critical BMP decoding fault

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Full Example

Inkplate_6_Motion_Image_From_Web.ino

Connect to WiFi and draw an image from the web.