79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
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#include "./image_loader_webp.hpp"
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#include <webp/demux.h>
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#include <webp/mux.h>
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#include <cassert>
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ImageLoaderWebP::ImageInfo ImageLoaderWebP::loadInfoFromMemory(const uint8_t* data, uint64_t data_size) {
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ImageInfo res;
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WebPData webp_data;
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WebPDataInit(&webp_data);
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webp_data.bytes = data;
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webp_data.size = data_size;
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WebPAnimDecoderOptions dec_options;
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WebPAnimDecoderOptionsInit(&dec_options);
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// Tune 'dec_options' as needed.
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dec_options.color_mode = MODE_RGBA;
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WebPAnimDecoder* dec = WebPAnimDecoderNew(&webp_data, &dec_options);
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if (dec == nullptr) {
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return res;
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}
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WebPAnimInfo anim_info;
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WebPAnimDecoderGetInfo(dec, &anim_info);
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res.width = anim_info.canvas_width;
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res.height = anim_info.canvas_height;
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return res;
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}
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ImageLoaderWebP::ImageResult ImageLoaderWebP::loadFromMemoryRGBA(const uint8_t* data, uint64_t data_size) {
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ImageResult res;
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WebPData webp_data;
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WebPDataInit(&webp_data);
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webp_data.bytes = data;
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webp_data.size = data_size;
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WebPAnimDecoderOptions dec_options;
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WebPAnimDecoderOptionsInit(&dec_options);
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// Tune 'dec_options' as needed.
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dec_options.color_mode = MODE_RGBA;
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WebPAnimDecoder* dec = WebPAnimDecoderNew(&webp_data, &dec_options);
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if (dec == nullptr) {
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return res;
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}
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WebPAnimInfo anim_info;
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WebPAnimDecoderGetInfo(dec, &anim_info);
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res.width = anim_info.canvas_width;
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res.height = anim_info.canvas_height;
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int prev_timestamp = 0;
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while (WebPAnimDecoderHasMoreFrames(dec)) {
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uint8_t* buf;
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int timestamp;
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WebPAnimDecoderGetNext(dec, &buf, ×tamp);
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// ... (Render 'buf' based on 'timestamp').
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// ... (Do NOT free 'buf', as it is owned by 'dec').
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// just be dumb and append
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auto& new_frame = res.frames.emplace_back();
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new_frame.ms = timestamp-prev_timestamp;
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prev_timestamp = timestamp;
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new_frame.data.insert(new_frame.data.end(), buf, buf+(res.width*res.height*4));
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}
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WebPAnimDecoderDelete(dec);
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assert(anim_info.frame_count == res.frames.size());
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return res;
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}
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