Add animated webp support (#20)
Co-authored-by: NRK <nrk@disroot.org> Co-authored-by: Stein Gunnar Bakkeby <bakkeby@gmail.com> Co-authored-by: Berke Kocaoğlu <berke.kocaoglu@metu.edu.tr>
This commit is contained in:
Sam Whitehead
NRK
parent
0e7ab7e5c3
commit
af98249b68
8
Makefile
8
Makefile
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@ -30,9 +30,15 @@ ifeq ($(HAVE_LIBGIF), 1)
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else
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HAVE_LIBGIF = 0
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endif
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ifeq ($(HAVE_LIBWEBP), 1)
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OPTIONAL_LIBS += -lwebpdemux -lwebp
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else
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HAVE_LIBWEBP = 0
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endif
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CPPFLAGS = -D_XOPEN_SOURCE=700 \
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-DHAVE_LIBGIF=$(HAVE_LIBGIF) -DHAVE_LIBEXIF=$(HAVE_LIBEXIF) \
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-DHAVE_LIBWEBP=$(HAVE_LIBWEBP) \
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-I/usr/include/freetype2 -I$(PREFIX)/include/freetype2
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LDLIBS = -lImlib2 -lX11 -lXft -lfontconfig $(OPTIONAL_LIBS)
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@ -61,7 +67,7 @@ window.o: icon/data.h
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config.mk:
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@echo "GEN $@"
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@echo "# 0 = disable, 1 = enable" > config.mk
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@for lib in exif gif; do \
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@for lib in exif gif webp; do \
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if echo "int main(){}" | $(CC) "-l$$lib" -o /dev/null -x c - 2>/dev/null ; then \
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echo "HAVE_LIB$$lib=1" | tr '[:lower:]' '[:upper:]' >> config.mk ; \
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fi \
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@ -53,6 +53,7 @@ The following libraries are optional. They are automatically enabled if installe
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* giflib : Used for animated gif playback.
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* libexif : Used for auto-orientation and exif thumbnails.
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* libwebp : Used for animated webp playback.
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Please make sure to install the corresponding development packages in case that
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you want to build nsxiv on a distribution with separate runtime and development
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152
image.c
152
image.c
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@ -36,6 +36,12 @@
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enum { DEF_GIF_DELAY = 75 };
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#endif
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#if HAVE_LIBWEBP
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#include <webp/decode.h>
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#include <webp/demux.h>
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enum { DEF_WEBP_DELAY = 75 };
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#endif
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float zoom_min;
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float zoom_max;
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@ -297,6 +303,135 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
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}
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#endif /* HAVE_LIBGIF */
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#if HAVE_LIBWEBP
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bool is_webp(const char *path)
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{
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/* The size (in bytes) of the largest amount of data required to verify a WebP image. */
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enum { max = 30 };
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const unsigned char fmt[max];
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bool ret = false;
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FILE *f;
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if ((f = fopen(path, "rb")) != NULL) {
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if (fread((unsigned char *) fmt, 1, max, f) == max)
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ret = WebPGetInfo(fmt, max, NULL, NULL);
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fclose(f);
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}
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return ret;
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}
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/* fframe img
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* NULL NULL = do nothing
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* x NULL = load the first frame as an Imlib_Image
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* NULL x = load all frames into img->multi.
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*/
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bool img_load_webp(const fileinfo_t *file, Imlib_Image *fframe, img_t *img)
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{
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FILE *webp_file;
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WebPData data;
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data.bytes = NULL;
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Imlib_Image im = NULL;
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struct WebPAnimDecoderOptions opts;
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WebPAnimDecoder *dec = NULL;
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struct WebPAnimInfo info;
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unsigned char *buf = NULL;
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int ts;
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const WebPDemuxer *demux;
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WebPIterator iter;
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unsigned long flags;
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unsigned int delay;
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bool err = false;
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if ((err = fframe == NULL && img == NULL))
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goto fail;
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if ((err = (webp_file = fopen(file->path, "rb")) == NULL)) {
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error(0, 0, "%s: Error opening webp image", file->name);
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goto fail;
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}
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fseek(webp_file, 0L, SEEK_END);
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data.size = ftell(webp_file);
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rewind(webp_file);
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data.bytes = emalloc(data.size);
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if ((err = fread((unsigned char *)data.bytes, 1, data.size, webp_file) != data.size)) {
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error(0, 0, "%s: Error reading webp image", file->name);
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goto fail;
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}
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/* Setup the WebP Animation Decoder */
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if ((err = !WebPAnimDecoderOptionsInit(&opts))) {
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error(0, 0, "%s: WebP library version mismatch", file->name);
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goto fail;
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}
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opts.color_mode = MODE_BGRA;
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/* NOTE: Multi-threaded decoding may cause problems on some system */
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opts.use_threads = true;
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dec = WebPAnimDecoderNew(&data, &opts);
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if ((err = (dec == NULL) || !WebPAnimDecoderGetInfo(dec, &info))) {
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error(0, 0, "%s: WebP parsing or memory error (file is corrupt?)", file->name);
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goto fail;
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}
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demux = WebPAnimDecoderGetDemuxer(dec);
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if (img == NULL) { /* Only get the first frame and put it into fframe. */
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if ((err = !WebPAnimDecoderGetNext(dec, &buf, &ts))) {
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error(0, 0, "%s: Error loading first frame", file->name);
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goto fail;
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}
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*fframe = imlib_create_image_using_copied_data(
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info.canvas_width, info.canvas_height, (DATA32*)buf);
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imlib_context_set_image(*fframe);
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imlib_image_set_has_alpha(WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS) & ALPHA_FLAG);
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} else {
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/* Get global information for the image */
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flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
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img->w = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH);
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img->h = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT);
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img->multi.cap = info.frame_count;
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img->multi.sel = 0;
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img->multi.frames = emalloc(info.frame_count * sizeof(img_frame_t));
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/* Load and decode frames (also works on images with only 1 frame) */
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img->multi.cnt = 0;
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while (WebPAnimDecoderGetNext(dec, &buf, &ts)) {
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im = imlib_create_image_using_copied_data(
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info.canvas_width, info.canvas_height, (DATA32*)buf);
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imlib_context_set_image(im);
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imlib_image_set_format("webp");
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/* Get an iterator of this frame - used for frame info (duration, etc.) */
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WebPDemuxGetFrame(demux, img->multi.cnt+1, &iter);
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imlib_image_set_has_alpha((flags & ALPHA_FLAG) == ALPHA_FLAG);
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/* Store info for this frame */
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img->multi.frames[img->multi.cnt].im = im;
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delay = iter.duration > 0 ? iter.duration : DEF_WEBP_DELAY;
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img->multi.frames[img->multi.cnt].delay = delay;
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img->multi.length += img->multi.frames[img->multi.cnt].delay;
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img->multi.cnt++;
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}
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WebPDemuxReleaseIterator(&iter);
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if (img->multi.cnt > 1) {
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imlib_context_set_image(img->im);
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imlib_free_image();
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img->im = img->multi.frames[0].im;
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} else if (img->multi.cnt == 1) {
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imlib_context_set_image(img->multi.frames[0].im);
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imlib_free_image();
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img->multi.cnt = 0;
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}
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imlib_context_set_image(img->im);
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}
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imlib_image_set_format("webp");
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fail:
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if (dec != NULL)
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WebPAnimDecoderDelete(dec);
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free((unsigned char *)data.bytes);
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return !err;
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}
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#endif /* HAVE_LIBWEBP */
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Imlib_Image img_open(const fileinfo_t *file)
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{
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struct stat st;
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@ -305,10 +440,21 @@ Imlib_Image img_open(const fileinfo_t *file)
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if (access(file->path, R_OK) == 0 &&
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stat(file->path, &st) == 0 && S_ISREG(st.st_mode))
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{
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im = imlib_load_image(file->path);
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#if HAVE_LIBWEBP
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if (is_webp(file->path))
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img_load_webp(file, &im, NULL);
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else
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#endif
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im = imlib_load_image(file->path);
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if (im != NULL) {
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imlib_context_set_image(im);
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#if HAVE_LIBWEBP
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const char *fmt;
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if ((fmt = imlib_image_format()) != NULL && !STREQ(fmt, "webp") &&
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imlib_image_get_data_for_reading_only() == NULL) {
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#else
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if (imlib_image_get_data_for_reading_only() == NULL) {
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#endif
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imlib_free_image();
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im = NULL;
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}
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@ -336,6 +482,10 @@ bool img_load(img_t *img, const fileinfo_t *file)
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#if HAVE_LIBGIF
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if (STREQ(fmt, "gif"))
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img_load_gif(img, file);
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#endif
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#if HAVE_LIBWEBP
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if (STREQ(fmt, "webp"))
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img_load_webp(file, NULL, img);
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#endif
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}
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img->w = imlib_image_get_width();
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