nsxiv/image.c

1091 lines
27 KiB
C

/* Copyright 2011-2020 Bert Muennich
* Copyright 2021-2023 nsxiv contributors
*
* This file is a part of nsxiv.
*
* nsxiv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* nsxiv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with nsxiv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "nsxiv.h"
#define INCLUDE_IMAGE_CONFIG
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#if HAVE_LIBEXIF
#include <libexif/exif-data.h>
#endif
#if HAVE_LIBGIF && !HAVE_IMLIB2_MULTI_FRAME
#include <gif_lib.h>
enum { DEF_GIF_DELAY = 75 };
#endif
#if HAVE_LIBWEBP && !HAVE_IMLIB2_MULTI_FRAME
#include <stdio.h>
#include <webp/decode.h>
#include <webp/demux.h>
enum { DEF_WEBP_DELAY = 75 };
#endif
#if HAVE_IMLIB2_MULTI_FRAME
enum { DEF_ANIM_DELAY = 75 };
#endif
#define ZOOM_MIN (zoom_levels[0] / 100)
#define ZOOM_MAX (zoom_levels[ARRLEN(zoom_levels) - 1] / 100)
static int calc_cache_size(void)
{
long cache, pages = -1, page_size = -1;
if (CACHE_SIZE_MEM_PERCENTAGE <= 0)
return 0;
#ifdef _SC_PHYS_PAGES /* _SC_PHYS_PAGES isn't POSIX */
pages = sysconf(_SC_PHYS_PAGES);
page_size = sysconf(_SC_PAGE_SIZE);
#endif
if (pages < 0 || page_size < 0)
return CACHE_SIZE_FALLBACK;
cache = (pages / 100) * CACHE_SIZE_MEM_PERCENTAGE;
cache *= page_size;
return MIN(cache, CACHE_SIZE_LIMIT);
}
void img_init(img_t *img, win_t *win)
{
imlib_context_set_display(win->env.dpy);
imlib_context_set_visual(win->env.vis);
imlib_context_set_colormap(win->env.cmap);
imlib_set_cache_size(calc_cache_size());
img->im = NULL;
img->win = win;
img->scalemode = options->scalemode;
img->zoom = options->zoom;
img->zoom = MAX(img->zoom, ZOOM_MIN);
img->zoom = MIN(img->zoom, ZOOM_MAX);
img->checkpan = false;
img->dirty = false;
img->anti_alias = options->anti_alias;
img->alpha_layer = options->alpha_layer;
img->autoreload_pending = false;
img->multi.cap = img->multi.cnt = 0;
img->multi.animate = options->animate;
img->multi.framedelay = options->framerate > 0 ? 1000 / options->framerate : 0;
img->multi.length = 0;
img->cmod = imlib_create_color_modifier();
imlib_context_set_color_modifier(img->cmod);
img->brightness = 0;
img->contrast = 0;
img_change_color_modifier(img, options->gamma, &img->gamma);
img->ss.on = options->slideshow > 0;
img->ss.delay = options->slideshow > 0 ? options->slideshow : SLIDESHOW_DELAY * 10u;
}
#if HAVE_LIBEXIF
void exif_auto_orientate(const fileinfo_t *file)
{
ExifData *ed;
ExifEntry *entry;
int byte_order, orientation = 0;
if ((ed = exif_data_new_from_file(file->path)) == NULL)
return;
byte_order = exif_data_get_byte_order(ed);
entry = exif_content_get_entry(ed->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION);
if (entry != NULL)
orientation = exif_get_short(entry->data, byte_order);
exif_data_unref(ed);
switch (orientation) {
case 5:
imlib_image_orientate(1);
/* fall through */
case 2:
imlib_image_flip_vertical();
break;
case 3:
imlib_image_orientate(2);
break;
case 7:
imlib_image_orientate(1);
/* fall through */
case 4:
imlib_image_flip_horizontal();
break;
case 6:
imlib_image_orientate(1);
break;
case 8:
imlib_image_orientate(3);
break;
}
}
#endif
#if HAVE_LIBGIF || HAVE_LIBWEBP || HAVE_IMLIB2_MULTI_FRAME
static void img_multiframe_context_set(img_t *img)
{
if (img->multi.cnt > 1) {
img_free(img->im, false);
img->im = img->multi.frames[0].im;
} else if (img->multi.cnt == 1) {
img_free(img->multi.frames[0].im, false);
img->multi.cnt = 0;
}
imlib_context_set_image(img->im);
}
#endif
#if (HAVE_LIBGIF || HAVE_LIBWEBP) && !HAVE_IMLIB2_MULTI_FRAME
static void img_multiframe_deprecation_notice(void)
{
static bool warned;
if (!warned) {
error(0, 0, "\n"
"################################################################\n"
"# DEPRECATION NOTICE #\n"
"################################################################\n"
"# Internal multi-frame gif and webp loaders are deprecated and #\n"
"# will be removed soon. Please upgrade to Imlib2 v1.8.0 for #\n"
"# multi-frame/animated image support. #\n"
"################################################################");
warned = true;
}
}
#endif
#if HAVE_LIBGIF && !HAVE_IMLIB2_MULTI_FRAME
static bool img_load_gif(img_t *img, const fileinfo_t *file)
{
GifFileType *gif;
GifRowType *rows = NULL;
GifRecordType rec;
ColorMapObject *cmap;
uint32_t bgpixel = 0, *data, *ptr;
uint32_t *prev_frame = NULL;
Imlib_Image im;
int i, j, bg, r, g, b;
int x, y, w, h, sw, sh;
int px, py, pw, ph;
int intoffset[] = { 0, 4, 2, 1 };
int intjump[] = { 8, 8, 4, 2 };
int transp = -1;
unsigned int disposal = 0, prev_disposal = 0;
unsigned int delay = 0;
bool err = false;
multi_img_t *m = &img->multi;
img_multiframe_deprecation_notice();
#if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
gif = DGifOpenFileName(file->path, NULL);
#else
gif = DGifOpenFileName(file->path);
#endif
if (gif == NULL) {
error(0, 0, "%s: Error opening gif image", file->name);
return false;
}
bg = gif->SBackGroundColor;
sw = gif->SWidth;
sh = gif->SHeight;
px = py = pw = ph = 0;
m->length = m->cnt = m->sel = 0;
do {
if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
err = true;
break;
}
if (rec == EXTENSION_RECORD_TYPE) {
int ext_code;
GifByteType *ext = NULL;
DGifGetExtension(gif, &ext_code, &ext);
while (ext) {
if (ext_code == GRAPHICS_EXT_FUNC_CODE) {
if (ext[1] & 1)
transp = (int)ext[4];
else
transp = -1;
delay = 10 * ((unsigned int)ext[3] << 8 | (unsigned int)ext[2]);
disposal = (unsigned int)ext[1] >> 2 & 0x7;
}
ext = NULL;
DGifGetExtensionNext(gif, &ext);
}
} else if (rec == IMAGE_DESC_RECORD_TYPE) {
if (DGifGetImageDesc(gif) == GIF_ERROR) {
err = true;
break;
}
x = gif->Image.Left;
y = gif->Image.Top;
w = gif->Image.Width;
h = gif->Image.Height;
rows = emalloc(h * sizeof(*rows));
for (i = 0; i < h; i++)
rows[i] = emalloc(w * sizeof(*rows[i]));
if (gif->Image.Interlace) {
for (i = 0; i < 4; i++) {
for (j = intoffset[i]; j < h; j += intjump[i])
DGifGetLine(gif, rows[j], w);
}
} else {
for (i = 0; i < h; i++)
DGifGetLine(gif, rows[i], w);
}
ptr = data = emalloc(sw * sh * sizeof(*data));
cmap = gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap;
/* if bg > cmap->ColorCount, it is transparent black already */
if (cmap && bg >= 0 && bg < cmap->ColorCount) {
r = cmap->Colors[bg].Red;
g = cmap->Colors[bg].Green;
b = cmap->Colors[bg].Blue;
bgpixel = 0x00ffffff & (r << 16 | g << 8 | b);
}
for (i = 0; i < sh; i++) {
for (j = 0; j < sw; j++) {
if (i < y || i >= y + h || j < x || j >= x + w ||
rows[i - y][j - x] == transp)
{
if (prev_frame != NULL &&
(prev_disposal != 2 || i < py || i >= py + ph ||
j < px || j >= px + pw))
{
*ptr = prev_frame[i * sw + j];
} else {
*ptr = bgpixel;
}
} else {
assert(cmap != NULL);
r = cmap->Colors[rows[i - y][j - x]].Red;
g = cmap->Colors[rows[i - y][j - x]].Green;
b = cmap->Colors[rows[i - y][j - x]].Blue;
*ptr = 0xffu << 24 | r << 16 | g << 8 | b;
}
ptr++;
}
}
im = imlib_create_image_using_copied_data(sw, sh, data);
for (i = 0; i < h; i++)
free(rows[i]);
free(rows);
free(data);
if (im == NULL) {
err = true;
break;
}
imlib_context_set_image(im);
imlib_image_set_format("gif");
if (transp >= 0)
imlib_image_set_has_alpha(1);
if (disposal != 3)
prev_frame = imlib_image_get_data_for_reading_only();
prev_disposal = disposal;
px = x, py = y, pw = w, ph = h;
assert(m->cnt <= m->cap);
if (m->cnt == m->cap) {
m->cap = m->cap == 0 ? 16 : (m->cap * 2);
m->frames = erealloc(m->frames, m->cap * sizeof(*m->frames));
}
m->frames[m->cnt].im = im;
delay = m->framedelay > 0 ? m->framedelay : delay;
m->frames[m->cnt].delay = delay > 0 ? delay : DEF_GIF_DELAY;
m->length += m->frames[m->cnt].delay;
m->cnt++;
}
} while (rec != TERMINATE_RECORD_TYPE);
#if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5 && GIFLIB_MINOR >= 1
DGifCloseFile(gif, NULL);
#else
DGifCloseFile(gif);
#endif
if (err && (file->flags & FF_WARN))
error(0, 0, "%s: Corrupted gif file", file->name);
img_multiframe_context_set(img);
return !err;
}
#endif /* HAVE_LIBGIF */
#if HAVE_LIBWEBP && !HAVE_IMLIB2_MULTI_FRAME
static bool img_load_webp(img_t *img, const fileinfo_t *file)
{
FILE *webp_file;
WebPData data;
Imlib_Image im = NULL;
struct WebPAnimDecoderOptions opts;
WebPAnimDecoder *dec = NULL;
struct WebPAnimInfo info;
unsigned char *buf = NULL, *bytes = NULL;
int ts;
const WebPDemuxer *demux;
WebPIterator iter;
unsigned long flags;
unsigned int delay;
bool err = false;
multi_img_t *m = &img->multi;
img_multiframe_deprecation_notice();
if ((webp_file = fopen(file->path, "rb")) == NULL) {
error(0, errno, "%s: Error opening webp image", file->name);
return false;
}
fseek(webp_file, 0L, SEEK_END);
data.size = ftell(webp_file);
rewind(webp_file);
bytes = emalloc(data.size);
if ((err = fread(bytes, 1, data.size, webp_file) != data.size)) {
error(0, 0, "%s: Error reading webp image", file->name);
goto fail;
}
data.bytes = bytes;
/* Setup the WebP Animation Decoder */
if ((err = !WebPAnimDecoderOptionsInit(&opts))) {
error(0, 0, "%s: WebP library version mismatch", file->name);
goto fail;
}
opts.color_mode = MODE_BGRA;
/* NOTE: Multi-threaded decoding may cause problems on some system */
opts.use_threads = true;
dec = WebPAnimDecoderNew(&data, &opts);
if ((err = (dec == NULL) || !WebPAnimDecoderGetInfo(dec, &info))) {
error(0, 0, "%s: WebP parsing or memory error (file is corrupt?)", file->name);
goto fail;
}
demux = WebPAnimDecoderGetDemuxer(dec);
/* Get global information for the image */
flags = WebPDemuxGetI(demux, WEBP_FF_FORMAT_FLAGS);
img->w = WebPDemuxGetI(demux, WEBP_FF_CANVAS_WIDTH);
img->h = WebPDemuxGetI(demux, WEBP_FF_CANVAS_HEIGHT);
if (info.frame_count > m->cap) {
m->cap = info.frame_count;
m->frames = erealloc(m->frames, m->cap * sizeof(*m->frames));
}
/* Load and decode frames (also works on images with only 1 frame) */
m->length = m->cnt = m->sel = 0;
while (WebPAnimDecoderGetNext(dec, &buf, &ts)) {
im = imlib_create_image_using_copied_data(info.canvas_width, info.canvas_height,
(uint32_t *)buf);
imlib_context_set_image(im);
imlib_image_set_format("webp");
/* Get an iterator of this frame - used for frame info (duration, etc.) */
WebPDemuxGetFrame(demux, m->cnt + 1, &iter);
imlib_image_set_has_alpha((flags & ALPHA_FLAG) == ALPHA_FLAG);
/* Store info for this frame */
m->frames[m->cnt].im = im;
delay = iter.duration > 0 ? iter.duration : DEF_WEBP_DELAY;
m->frames[m->cnt].delay = delay;
m->length += m->frames[m->cnt].delay;
m->cnt++;
}
WebPDemuxReleaseIterator(&iter);
img_multiframe_context_set(img);
fail:
if (dec != NULL)
WebPAnimDecoderDelete(dec);
free(bytes);
fclose(webp_file);
return !err;
}
#endif /* HAVE_LIBWEBP */
#if HAVE_IMLIB2_MULTI_FRAME
static void img_area_clear(int x, int y, int w, int h)
{
assert(x >= 0 && y >= 0);
assert(w > 0 && h > 0);
imlib_image_set_has_alpha(1);
imlib_context_set_blend(0);
imlib_context_set_color(0, 0, 0, 0);
imlib_image_fill_rectangle(x, y, w, h);
}
static bool img_load_multiframe(img_t *img, const fileinfo_t *file)
{
unsigned int n, fcnt;
Imlib_Image blank;
Imlib_Frame_Info finfo;
int px, py, pw, ph, pflag;
multi_img_t *m = &img->multi;
imlib_context_set_image(img->im);
imlib_image_get_frame_info(&finfo);
if ((fcnt = finfo.frame_count) <= 1 || !(finfo.frame_flags & IMLIB_IMAGE_ANIMATED))
return false;
img->w = finfo.canvas_w;
img->h = finfo.canvas_h;
if (fcnt > m->cap) {
m->cap = fcnt;
m->frames = erealloc(m->frames, m->cap * sizeof(*m->frames));
}
if ((blank = imlib_create_image(img->w, img->h)) == NULL) {
error(0, 0, "%s: couldn't create image", file->name);
return false;
}
imlib_context_set_image(blank);
img_area_clear(0, 0, img->w, img->h);
imlib_context_set_dither(0);
imlib_context_set_anti_alias(0);
imlib_context_set_color_modifier(NULL);
imlib_context_set_operation(IMLIB_OP_COPY);
/*
* Imlib2 gives back a "raw frame", we need to blend it on top of the
* previous frame ourselves if necessary to get the fully decoded frame.
*/
pflag = m->length = m->cnt = m->sel = 0;
px = py = pw = ph = 0;
for (n = 1; n <= fcnt; ++n) {
Imlib_Image frame, canvas;
int sx, sy, sw, sh;
bool has_alpha;
imlib_context_set_image(m->cnt < 1 ? blank : m->frames[m->cnt - 1].im);
canvas = imlib_clone_image();
if ((frame = imlib_load_image_frame(file->path, n)) != NULL) {
imlib_context_set_image(frame);
imlib_image_set_changes_on_disk(); /* see img_load() for rationale */
imlib_image_get_frame_info(&finfo);
}
/* NOTE: the underlying file can end up changing during load.
* so check if frame_count, w, h are all still the same or not.
*/
if (canvas == NULL || frame == NULL || finfo.frame_count != (int)fcnt ||
finfo.canvas_w != img->w || finfo.canvas_h != img->h)
{
img_free(frame, false);
img_free(canvas, false);
error(0, 0, "%s: failed to load frame %d", file->name, n);
break;
}
sx = finfo.frame_x;
sy = finfo.frame_y;
sw = finfo.frame_w;
sh = finfo.frame_h;
has_alpha = imlib_image_has_alpha();
imlib_context_set_image(canvas);
/* the dispose flags are explained in Imlib2's header */
if (pflag & IMLIB_FRAME_DISPOSE_CLEAR) {
img_area_clear(px, py, pw, ph);
} else if (pflag & IMLIB_FRAME_DISPOSE_PREV) {
Imlib_Image p = m->cnt < 2 ? blank : m->frames[m->cnt - 2].im;
assert(m->cnt > 0);
img_area_clear(0, 0, img->w, img->h);
imlib_blend_image_onto_image(p, 1, px, py, pw, ph, px, py, pw, ph);
}
pflag = finfo.frame_flags;
if (pflag & (IMLIB_FRAME_DISPOSE_CLEAR | IMLIB_FRAME_DISPOSE_PREV)) {
/* remember these so we can "dispose" them before blending next frame */
px = sx;
py = sy;
pw = sw;
ph = sh;
}
assert(imlib_context_get_operation() == IMLIB_OP_COPY);
imlib_image_set_has_alpha(has_alpha);
imlib_context_set_blend(!!(finfo.frame_flags & IMLIB_FRAME_BLEND));
imlib_blend_image_onto_image(frame, has_alpha, 0, 0, sw, sh, sx, sy, sw, sh);
m->frames[m->cnt].im = canvas;
m->frames[m->cnt].delay = finfo.frame_delay ? finfo.frame_delay : DEF_ANIM_DELAY;
m->length += m->frames[m->cnt].delay;
m->cnt++;
img_free(frame, false);
}
img_free(blank, false);
img_multiframe_context_set(img);
imlib_context_set_color_modifier(img->cmod); /* restore cmod */
return m->cnt > 0;
}
#endif /* HAVE_IMLIB2_MULTI_FRAME */
Imlib_Image img_open(const fileinfo_t *file)
{
struct stat st;
Imlib_Image im = NULL;
if (access(file->path, R_OK) == 0 &&
stat(file->path, &st) == 0 && S_ISREG(st.st_mode) &&
#if HAVE_IMLIB2_MULTI_FRAME
(im = imlib_load_image_frame(file->path, 1)) != NULL)
#else
(im = imlib_load_image_immediately(file->path)) != NULL)
#endif
{
imlib_context_set_image(im);
}
/* UPGRADE: Imlib2 v1.10.0: better error reporting with
* imlib_get_error() + imlib_strerror() */
if (im == NULL && (file->flags & FF_WARN))
error(0, 0, "%s: Error opening image", file->name);
return im;
}
bool img_load(img_t *img, const fileinfo_t *file)
{
const char *fmt;
bool animated = false;
if ((img->im = img_open(file)) == NULL)
return false;
/* ensure that the image's timestamp is checked when loading from cache
* to avoid issues like: https://codeberg.org/nsxiv/nsxiv/issues/436
*/
imlib_image_set_changes_on_disk();
/* UPGRADE: Imlib2 v1.7.5: remove these exif related ifdefs */
/* since v1.7.5, Imlib2 can parse exif orientation from jpeg files.
* this version also happens to be the first one which defines the
* IMLIB2_VERSION macro.
*/
#if HAVE_LIBEXIF && !defined(IMLIB2_VERSION)
exif_auto_orientate(file);
#endif
#if HAVE_IMLIB2_MULTI_FRAME
animated = img_load_multiframe(img, file);
#endif
if ((fmt = imlib_image_format()) != NULL) { /* NOLINT: fmt might be unused, not worth fixing */
#if HAVE_LIBGIF && !HAVE_IMLIB2_MULTI_FRAME
if (STREQ(fmt, "gif"))
img_load_gif(img, file);
#endif
#if HAVE_LIBWEBP && !HAVE_IMLIB2_MULTI_FRAME
if (STREQ(fmt, "webp"))
img_load_webp(img, file);
#endif
#if HAVE_LIBEXIF && defined(IMLIB2_VERSION)
if (!STREQ(fmt, "jpeg") && !STREQ(fmt, "jpg"))
exif_auto_orientate(file);
#endif
}
/* for animated images, we want the _canvas_ width/height, which
* img_load_multiframe() sets already.
*/
if (!animated) {
img->w = imlib_image_get_width();
img->h = imlib_image_get_height();
}
img->checkpan = true;
img->dirty = true;
return true;
}
CLEANUP void img_free(Imlib_Image im, bool decache)
{
if (im != NULL) {
imlib_context_set_image(im);
decache ? imlib_free_image_and_decache() : imlib_free_image();
}
}
CLEANUP void img_close(img_t *img, bool decache)
{
unsigned int i;
if (img->multi.cnt > 0) {
for (i = 0; i < img->multi.cnt; i++)
img_free(img->multi.frames[i].im, decache);
/* NOTE: the above only decaches the "composed frames",
* and not the "raw frame" that's associated with the file.
* which leads to issues like: https://codeberg.org/nsxiv/nsxiv/issues/456
*/
#if HAVE_IMLIB2_MULTI_FRAME
#if IMLIB2_VERSION >= IMLIB2_VERSION_(1, 12, 0)
if (decache)
imlib_image_decache_file(files[fileidx].path);
#else /* UPGRADE: Imlib2 v1.12.0: remove this hack */
/* HACK: try to reload all the frames and forcefully decache them
* if imlib_image_decache_file() isn't available.
*/
for (i = 0; decache && i < img->multi.cnt; i++)
img_free(imlib_load_image_frame(files[fileidx].path, i + 1), true);
#endif
#endif
img->multi.cnt = 0;
img->im = NULL;
} else if (img->im != NULL) {
img_free(img->im, decache);
img->im = NULL;
}
}
static void img_check_pan(img_t *img, bool moved)
{
win_t *win;
float w, h, ox, oy;
win = img->win;
w = img->w * img->zoom;
h = img->h * img->zoom;
ox = img->x;
oy = img->y;
if (w < win->w)
img->x = (win->w - w) / 2;
else if (img->x > 0)
img->x = 0;
else if (img->x + w < win->w)
img->x = win->w - w;
if (h < win->h)
img->y = (win->h - h) / 2;
else if (img->y > 0)
img->y = 0;
else if (img->y + h < win->h)
img->y = win->h - h;
if (!moved && (ox != img->x || oy != img->y))
img->dirty = true;
}
static bool img_fit(img_t *img)
{
float z, zw, zh;
if (img->scalemode == SCALE_ZOOM)
return false;
zw = (float)img->win->w / (float)img->w;
zh = (float)img->win->h / (float)img->h;
switch (img->scalemode) {
case SCALE_FILL:
z = MAX(zw, zh);
break;
case SCALE_WIDTH:
z = zw;
break;
case SCALE_HEIGHT:
z = zh;
break;
default:
z = MIN(zw, zh);
break;
}
z = MIN(z, img->scalemode == SCALE_DOWN ? 1.0 : ZOOM_MAX);
if (ABS(img->zoom - z) > 1.0 / MAX(img->w, img->h)) {
img->zoom = z;
img->dirty = true;
return true;
} else {
return false;
}
}
void img_render(img_t *img)
{
win_t *win;
int sx, sy, sw, sh;
int dx, dy, dw, dh;
Imlib_Image bg;
win = img->win;
img_fit(img);
if (img->checkpan) {
img_check_pan(img, false);
img->checkpan = false;
}
if (!img->dirty)
return;
/* calculate source and destination offsets:
* - part of image drawn on full window, or
* - full image drawn on part of window
*/
if (img->x <= 0) {
sx = -img->x / img->zoom + 0.5;
sw = win->w / img->zoom;
dx = 0;
dw = win->w;
} else {
sx = 0;
sw = img->w;
dx = img->x;
dw = MAX(img->w * img->zoom, 1);
}
if (img->y <= 0) {
sy = -img->y / img->zoom + 0.5;
sh = win->h / img->zoom;
dy = win->bar.top ? win->bar.h : 0;
dh = win->h;
} else {
sy = 0;
sh = img->h;
dy = img->y + (win->bar.top ? win->bar.h : 0);
dh = MAX(img->h * img->zoom, 1);
}
win_clear(win);
imlib_context_set_image(img->im);
imlib_context_set_anti_alias(img->anti_alias);
imlib_context_set_drawable(win->buf.pm);
/* manual blending, for performance reasons.
* see https://phab.enlightenment.org/T8969#156167 for more details.
*/
if (imlib_image_has_alpha()) {
if ((bg = imlib_create_image(dw, dh)) == NULL) {
error(0, ENOMEM, "Failed to create image");
goto fallback;
}
imlib_context_set_image(bg);
imlib_image_set_has_alpha(0);
if (img->alpha_layer) {
int i, c, r;
uint32_t col[2] = { 0xFF666666, 0xFF999999 };
uint32_t *data = imlib_image_get_data();
for (r = 0; r < dh; r++) {
i = r * dw;
if (r == 0 || r == 8) {
for (c = 0; c < dw; c++)
data[i++] = col[!(c & 8) ^ !r];
} else {
memcpy(&data[i], &data[(r & 8) * dw], dw * sizeof(data[0]));
}
}
imlib_image_put_back_data(data);
} else {
XColor c = win->win_bg;
imlib_context_set_color(c.red >> 8, c.green >> 8, c.blue >> 8, 0xFF);
imlib_image_fill_rectangle(0, 0, dw, dh);
}
imlib_context_set_blend(1);
imlib_context_set_operation(IMLIB_OP_COPY);
imlib_blend_image_onto_image(img->im, 0, sx, sy, sw, sh, 0, 0, dw, dh);
imlib_context_set_color_modifier(NULL);
imlib_render_image_on_drawable(dx, dy);
imlib_free_image();
imlib_context_set_color_modifier(img->cmod);
} else {
fallback:
imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
}
img->dirty = false;
}
bool img_fit_win(img_t *img, scalemode_t sm)
{
float oz;
oz = img->zoom;
img->scalemode = sm;
if (img_fit(img)) {
img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * img->zoom / oz;
img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * img->zoom / oz;
img->checkpan = true;
return true;
} else {
return false;
}
}
bool img_zoom_to(img_t *img, float z)
{
int x, y;
if (ZOOM_MIN <= z && z <= ZOOM_MAX) {
win_cursor_pos(img->win, &x, &y);
if (x < 0 || (unsigned int)x >= img->win->w ||
y < 0 || (unsigned int)y >= img->win->h)
{
x = img->win->w / 2;
y = img->win->h / 2;
}
img->x = x - (x - img->x) * z / img->zoom;
img->y = y - (y - img->y) * z / img->zoom;
img->zoom = z;
img->scalemode = SCALE_ZOOM;
img->dirty = img->checkpan = true;
return true;
} else {
return false;
}
}
bool img_zoom(img_t *img, int d)
{
int i = d > 0 ? 0 : (int)ARRLEN(zoom_levels) - 1;
while (i >= 0 && i < (int)ARRLEN(zoom_levels) &&
(d > 0 ? zoom_levels[i] / 100 <= img->zoom : zoom_levels[i] / 100 >= img->zoom))
{
i += d;
}
i = MIN(MAX(i, 0), (int)ARRLEN(zoom_levels) - 1);
return img_zoom_to(img, zoom_levels[i] / 100);
}
bool img_pos(img_t *img, float x, float y)
{
float ox, oy;
ox = img->x;
oy = img->y;
img->x = x;
img->y = y;
img_check_pan(img, true);
if (ox != img->x || oy != img->y) {
img->dirty = true;
return true;
} else {
return false;
}
}
static bool img_move(img_t *img, float dx, float dy)
{
return img_pos(img, img->x + dx, img->y + dy);
}
bool img_pan(img_t *img, direction_t dir, int d)
{
/* d < 0: screen-wise
* d = 0: 1/PAN_FRACTION of screen
* d > 0: num of pixels
*/
float x, y;
if (d > 0) {
x = y = MAX(1, (float)d * img->zoom);
} else {
x = img->win->w / (d < 0 ? 1 : PAN_FRACTION);
y = img->win->h / (d < 0 ? 1 : PAN_FRACTION);
}
switch (dir) {
case DIR_LEFT:
return img_move(img, x, 0.0);
case DIR_RIGHT:
return img_move(img, -x, 0.0);
case DIR_UP:
return img_move(img, 0.0, y);
case DIR_DOWN:
return img_move(img, 0.0, -y);
}
return false;
}
bool img_pan_center(img_t *img)
{
float x, y;
x = (img->win->w - img->w * img->zoom) / 2.0;
y = (img->win->h - img->h * img->zoom) / 2.0;
return img_pos(img, x, y);
}
bool img_pan_edge(img_t *img, direction_t dir)
{
float ox, oy;
ox = img->x;
oy = img->y;
if (dir & DIR_LEFT)
img->x = 0;
if (dir & DIR_RIGHT)
img->x = img->win->w - img->w * img->zoom;
if (dir & DIR_UP)
img->y = 0;
if (dir & DIR_DOWN)
img->y = img->win->h - img->h * img->zoom;
img_check_pan(img, true);
if (ox != img->x || oy != img->y) {
img->dirty = true;
return true;
} else {
return false;
}
}
void img_rotate(img_t *img, degree_t d)
{
unsigned int i, tmp;
float ox, oy;
imlib_context_set_image(img->im);
imlib_image_orientate(d);
for (i = 0; i < img->multi.cnt; i++) {
if (i != img->multi.sel) {
imlib_context_set_image(img->multi.frames[i].im);
imlib_image_orientate(d);
}
}
if (d == DEGREE_90 || d == DEGREE_270) {
ox = d == DEGREE_90 ? img->x : img->win->w - img->x - img->w * img->zoom;
oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom;
img->x = oy + (img->win->w - img->win->h) / 2;
img->y = ox + (img->win->h - img->win->w) / 2;
tmp = img->w;
img->w = img->h;
img->h = tmp;
img->checkpan = true;
}
img->dirty = true;
}
void img_flip(img_t *img, flipdir_t d)
{
unsigned int i;
void (*imlib_flip_op[3])(void) = {
imlib_image_flip_horizontal,
imlib_image_flip_vertical,
imlib_image_flip_diagonal
};
d = (d & (FLIP_HORIZONTAL | FLIP_VERTICAL)) - 1;
if (d < 0 || d >= ARRLEN(imlib_flip_op))
return;
imlib_context_set_image(img->im);
imlib_flip_op[d]();
for (i = 0; i < img->multi.cnt; i++) {
if (i != img->multi.sel) {
imlib_context_set_image(img->multi.frames[i].im);
imlib_flip_op[d]();
}
}
img->dirty = true;
}
void img_toggle_antialias(img_t *img)
{
img->anti_alias = !img->anti_alias;
imlib_context_set_image(img->im);
imlib_context_set_anti_alias(img->anti_alias);
img->dirty = true;
}
static double steps_to_range(int d, double max, double offset)
{
return offset + d * ((d <= 0 ? 1.0 : (max - 1.0)) / CC_STEPS);
}
void img_update_color_modifiers(img_t *img)
{
assert(imlib_context_get_color_modifier() == img->cmod);
imlib_reset_color_modifier();
if (img->gamma != 0)
imlib_modify_color_modifier_gamma(steps_to_range(img->gamma, GAMMA_MAX, 1.0));
if (img->brightness != 0)
imlib_modify_color_modifier_brightness(steps_to_range(img->brightness, BRIGHTNESS_MAX, 0.0));
if (img->contrast != 0)
imlib_modify_color_modifier_contrast(steps_to_range(img->contrast, CONTRAST_MAX, 1.0));
img->dirty = true;
}
bool img_change_color_modifier(img_t *img, int d, int *target)
{
int value = d == 0 ? 0 : MIN(MAX(*target + d, -CC_STEPS), CC_STEPS);
if (*target == value)
return false;
*target = value;
img_update_color_modifiers(img);
return true;
}
static bool img_frame_goto(img_t *img, int n)
{
if (n < 0 || (unsigned int)n >= img->multi.cnt || (unsigned int)n == img->multi.sel)
return false;
img->multi.sel = n;
img->im = img->multi.frames[n].im;
imlib_context_set_image(img->im);
img->w = imlib_image_get_width();
img->h = imlib_image_get_height();
img->checkpan = true;
img->dirty = true;
return true;
}
bool img_frame_navigate(img_t *img, int d)
{
if (img->multi.cnt == 0 || d == 0)
return false;
d += img->multi.sel;
d = MAX(0, MIN(d, (int)img->multi.cnt - 1));
return img_frame_goto(img, d);
}
bool img_frame_animate(img_t *img)
{
if (img->multi.cnt > 0)
return img_frame_goto(img, (img->multi.sel + 1) % img->multi.cnt);
else
return false;
}