Module encode 

Encodes animated thumbnails.

A picture that carries a frame sequence can answer a request for an animated thumbnail with the frames themselves rather than one of them. The three containers MSC2705 names each hold a sequence differently, so each has its own decoder here, and all of them produce a GIF, which is the one animated format this build can encode.

The caps that bound the work live here rather than at either call site, so a source reaches no decoder before what it would cost is known.

Structs

Output 🔒

Constants

ANIMATED_NAME 🔒

GIF_SPEED 🔒

Quantization effort the GIF encoder spends per frame.

Functions

canvas_pixels 🔒

Pixels one composited frame of this source occupies.

decoder_limits 🔒

Creates decoder limits from the configured pixel budget.

encode_frames 🔒

Encode a picture’s frames as a GIF scaled to these dimensions.

encode_sequence 🔒

Encodes a bounded frame sequence into one GIF buffer.

gif_frames 🔒

Builds a bounded GIF frame iterator.

png_frames 🔒

Builds a bounded APNG frame iterator.

source_frames 🔒

The frame sequence a picture carries, and what one frame of it costs.

webp_frames 🔒

Builds a bounded WebP frame iterator.