814 lines
16 KiB
C
814 lines
16 KiB
C
/* Copyright 2011, 2012 Bert Muennich
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*
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* This file is part of sxiv.
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*
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* sxiv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* sxiv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with sxiv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define _POSIX_C_SOURCE 200112L
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#define _IMAGE_CONFIG
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#define _RENDER_CONFIG
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#if HAVE_GIFLIB
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#include <gif_lib.h>
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enum { MIN_GIF_DELAY = 25 };
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#endif
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#include "exif.h"
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#include "image.h"
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#include "options.h"
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#include "util.h"
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#include "config.h"
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float zoom_min;
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float zoom_max;
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static int zoomdiff(float z1, float z2)
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{
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return (int) (z1 * 1000.0 - z2 * 1000.0);
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}
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static void img_apply_gamma(img_t *img)
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{
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if (img == NULL || img->im == NULL || img->cmod == NULL)
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return;
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if (img->gamma == 0) {
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imlib_context_set_color_modifier(NULL);
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} else {
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double range = img->gamma <= 0 ? 1.0 : GAMMA_MAX - 1.0;
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imlib_context_set_color_modifier(img->cmod);
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imlib_reset_color_modifier();
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imlib_modify_color_modifier_gamma(1.0 + img->gamma * (range / GAMMA_RANGE));
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}
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}
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void img_init(img_t *img, win_t *win)
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{
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zoom_min = zoom_levels[0] / 100.0;
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zoom_max = zoom_levels[ARRLEN(zoom_levels) - 1] / 100.0;
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if (img == NULL || win == NULL)
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return;
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imlib_context_set_display(win->env.dpy);
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imlib_context_set_visual(win->env.vis);
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imlib_context_set_colormap(win->env.cmap);
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img->im = NULL;
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img->win = win;
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img->zoom = options->zoom;
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img->zoom = MAX(img->zoom, zoom_min);
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img->zoom = MIN(img->zoom, zoom_max);
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img->checkpan = false;
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img->dirty = false;
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img->aa = RENDER_ANTI_ALIAS;
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img->alpha = !RENDER_WHITE_ALPHA;
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img->multi.cap = img->multi.cnt = 0;
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img->multi.animate = false;
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img->cmod = imlib_create_color_modifier();
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img->gamma = MIN(MAX(options->gamma, -GAMMA_RANGE), GAMMA_RANGE);
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}
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void exif_auto_orientate(const fileinfo_t *file)
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{
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switch (exif_orientation(file)) {
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case 5:
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imlib_image_orientate(1);
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case 2:
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imlib_image_flip_vertical();
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break;
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case 3:
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imlib_image_orientate(2);
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break;
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case 7:
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imlib_image_orientate(1);
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case 4:
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imlib_image_flip_horizontal();
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break;
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case 6:
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imlib_image_orientate(1);
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break;
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case 8:
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imlib_image_orientate(3);
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break;
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}
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}
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#if HAVE_GIFLIB
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bool img_load_gif(img_t *img, const fileinfo_t *file)
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{
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GifFileType *gif;
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GifRowType *rows = NULL;
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GifRecordType rec;
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ColorMapObject *cmap;
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DATA32 bgpixel, *data, *ptr;
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DATA32 *prev_frame = NULL;
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Imlib_Image im;
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int i, j, bg, r, g, b;
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int x, y, w, h, sw, sh;
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int px, py, pw, ph;
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int intoffset[] = { 0, 4, 2, 1 };
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int intjump[] = { 8, 8, 4, 2 };
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int transp = -1;
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unsigned int disposal = 0, prev_disposal = 0;
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unsigned int delay = 0;
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bool err = false;
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if (img->multi.cap == 0) {
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img->multi.cap = 8;
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img->multi.frames = (img_frame_t*)
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s_malloc(sizeof(img_frame_t) * img->multi.cap);
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}
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img->multi.cnt = 0;
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img->multi.sel = 0;
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#if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
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gif = DGifOpenFileName(file->path, NULL);
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#else
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gif = DGifOpenFileName(file->path);
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#endif
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if (gif == NULL) {
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warn("could not open gif file: %s", file->name);
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return false;
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}
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bg = gif->SBackGroundColor;
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sw = gif->SWidth;
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sh = gif->SHeight;
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px = py = pw = ph = 0;
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do {
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if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
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err = true;
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break;
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}
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if (rec == EXTENSION_RECORD_TYPE) {
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int ext_code;
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GifByteType *ext = NULL;
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DGifGetExtension(gif, &ext_code, &ext);
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while (ext) {
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if (ext_code == 0xf9) {
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if (ext[1] & 1)
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transp = (int) ext[4];
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else
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transp = -1;
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delay = 10 * ((unsigned int) ext[3] << 8 | (unsigned int) ext[2]);
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if (delay)
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delay = MAX(delay, MIN_GIF_DELAY);
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disposal = (unsigned int) ext[1] >> 2 & 0x7;
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}
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ext = NULL;
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DGifGetExtensionNext(gif, &ext);
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}
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} else if (rec == IMAGE_DESC_RECORD_TYPE) {
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if (DGifGetImageDesc(gif) == GIF_ERROR) {
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err = true;
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break;
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}
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x = gif->Image.Left;
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y = gif->Image.Top;
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w = gif->Image.Width;
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h = gif->Image.Height;
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rows = (GifRowType*) s_malloc(h * sizeof(GifRowType));
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for (i = 0; i < h; i++)
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rows[i] = (GifRowType) s_malloc(w * sizeof(GifPixelType));
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if (gif->Image.Interlace) {
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for (i = 0; i < 4; i++) {
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for (j = intoffset[i]; j < h; j += intjump[i])
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DGifGetLine(gif, rows[j], w);
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}
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} else {
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for (i = 0; i < h; i++)
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DGifGetLine(gif, rows[i], w);
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}
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ptr = data = (DATA32*) s_malloc(sizeof(DATA32) * sw * sh);
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cmap = gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap;
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r = cmap->Colors[bg].Red;
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g = cmap->Colors[bg].Green;
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b = cmap->Colors[bg].Blue;
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bgpixel = 0x00ffffff & (r << 16 | g << 8 | b);
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for (i = 0; i < sh; i++) {
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for (j = 0; j < sw; j++) {
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if (i < y || i >= y + h || j < x || j >= x + w ||
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rows[i-y][j-x] == transp)
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{
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if (prev_frame != NULL && (prev_disposal != 2 ||
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i < py || i >= py + ph || j < px || j >= px + pw))
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{
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*ptr = prev_frame[i * sw + j];
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} else {
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*ptr = bgpixel;
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}
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} else {
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r = cmap->Colors[rows[i-y][j-x]].Red;
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g = cmap->Colors[rows[i-y][j-x]].Green;
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b = cmap->Colors[rows[i-y][j-x]].Blue;
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*ptr = 0xff << 24 | r << 16 | g << 8 | b;
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}
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ptr++;
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}
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}
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im = imlib_create_image_using_copied_data(sw, sh, data);
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for (i = 0; i < h; i++)
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free(rows[i]);
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free(rows);
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free(data);
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if (im == NULL) {
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err = true;
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break;
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}
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imlib_context_set_image(im);
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imlib_image_set_format("gif");
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if (transp >= 0)
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imlib_image_set_has_alpha(1);
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if (disposal != 3)
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prev_frame = imlib_image_get_data_for_reading_only();
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prev_disposal = disposal;
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px = x, py = y, pw = w, ph = h;
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if (img->multi.cnt == img->multi.cap) {
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img->multi.cap *= 2;
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img->multi.frames = (img_frame_t*)
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s_realloc(img->multi.frames,
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img->multi.cap * sizeof(img_frame_t));
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}
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img->multi.frames[img->multi.cnt].im = im;
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img->multi.frames[img->multi.cnt].delay = delay ? delay : GIF_DELAY;
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img->multi.cnt++;
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}
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} while (rec != TERMINATE_RECORD_TYPE);
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DGifCloseFile(gif);
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if (err && !file->loaded)
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warn("corrupted gif file: %s", file->name);
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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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img->multi.animate = GIF_AUTOPLAY;
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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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img->multi.animate = false;
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}
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imlib_context_set_image(img->im);
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return !err;
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}
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#endif /* HAVE_GIFLIB */
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bool img_load(img_t *img, const fileinfo_t *file)
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{
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const char *fmt;
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if (img == NULL || file == NULL || file->name == NULL || file->path == NULL)
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return false;
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if (access(file->path, R_OK) < 0 ||
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(img->im = imlib_load_image(file->path)) == NULL)
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{
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warn("could not open image: %s", file->name);
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return false;
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}
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imlib_context_set_image(img->im);
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imlib_image_set_changes_on_disk();
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if ((fmt = imlib_image_format()) == NULL) {
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warn("could not open image: %s", file->name);
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return false;
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}
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if (STREQ(fmt, "jpeg"))
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exif_auto_orientate(file);
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#if HAVE_GIFLIB
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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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img_apply_gamma(img);
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img->w = imlib_image_get_width();
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img->h = imlib_image_get_height();
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img->scalemode = options->scalemode;
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img->re = false;
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img->checkpan = false;
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img->dirty = true;
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return true;
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}
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void img_close(img_t *img, bool decache)
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{
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int i;
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if (img == NULL)
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return;
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if (img->multi.cnt > 0) {
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for (i = 0; i < img->multi.cnt; i++) {
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imlib_context_set_image(img->multi.frames[i].im);
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imlib_free_image();
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}
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img->multi.cnt = 0;
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img->im = NULL;
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} else if (img->im != NULL) {
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imlib_context_set_image(img->im);
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if (decache)
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imlib_free_image_and_decache();
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else
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imlib_free_image();
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img->im = NULL;
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}
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if (img->cmod)
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imlib_context_set_color_modifier(NULL);
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}
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void img_check_pan(img_t *img, bool moved)
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{
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win_t *win;
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int ox, oy;
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if (img == NULL || img->im == NULL || img->win == NULL)
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return;
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win = img->win;
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ox = img->x;
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oy = img->y;
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if (img->w * img->zoom > win->w) {
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if (img->x > 0 && img->x + img->w * img->zoom > win->w)
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img->x = 0;
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if (img->x < 0 && img->x + img->w * img->zoom < win->w)
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img->x = win->w - img->w * img->zoom;
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} else {
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img->x = (win->w - img->w * img->zoom) / 2;
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}
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if (img->h * img->zoom > win->h) {
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if (img->y > 0 && img->y + img->h * img->zoom > win->h)
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img->y = 0;
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if (img->y < 0 && img->y + img->h * img->zoom < win->h)
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img->y = win->h - img->h * img->zoom;
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} else {
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img->y = (win->h - img->h * img->zoom) / 2;
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}
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if (!moved && (ox != img->x || oy != img->y))
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img->dirty = true;
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}
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bool img_fit(img_t *img)
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{
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float z, zmax, zw, zh;
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if (img == NULL || img->im == NULL || img->win == NULL)
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return false;
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if (img->scalemode == SCALE_ZOOM)
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return false;
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zmax = img->scalemode == SCALE_DOWN ? 1.0 : zoom_max;
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zw = (float) img->win->w / (float) img->w;
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zh = (float) img->win->h / (float) img->h;
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switch (img->scalemode) {
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case SCALE_WIDTH:
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z = zw;
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break;
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case SCALE_HEIGHT:
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z = zh;
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break;
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default:
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z = MIN(zw, zh);
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break;
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}
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z = MAX(z, zoom_min);
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z = MIN(z, zmax);
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if (zoomdiff(z, img->zoom) != 0) {
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img->zoom = z;
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img->dirty = true;
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return true;
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} else {
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return false;
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}
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}
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void img_render(img_t *img)
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{
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win_t *win;
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int sx, sy, sw, sh;
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int dx, dy, dw, dh;
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if (img == NULL || img->im == NULL || img->win == NULL)
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return;
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win = img->win;
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img_fit(img);
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if (!img->re) {
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/* rendered for the first time */
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img->re = true;
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if (img->zoom * img->w <= win->w)
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img->x = (win->w - img->w * img->zoom) / 2;
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else
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img->x = 0;
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if (img->zoom * img->h <= win->h)
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img->y = (win->h - img->h * img->zoom) / 2;
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else
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img->y = 0;
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}
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if (img->checkpan) {
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img_check_pan(img, false);
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img->checkpan = false;
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}
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if (!img->dirty)
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return;
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/* calculate source and destination offsets */
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if (img->x < 0) {
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sx = -img->x / img->zoom;
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sw = win->w / img->zoom;
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dx = 0;
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dw = win->w;
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} else {
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sx = 0;
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sw = img->w;
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dx = img->x;
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dw = img->w * img->zoom;
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}
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if (img->y < 0) {
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sy = -img->y / img->zoom;
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sh = win->h / img->zoom;
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dy = 0;
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dh = win->h;
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} else {
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sy = 0;
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sh = img->h;
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dy = img->y;
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dh = img->h * img->zoom;
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}
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win_clear(win);
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imlib_context_set_image(img->im);
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imlib_context_set_anti_alias(img->aa);
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if (!img->alpha && imlib_image_has_alpha())
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win_draw_rect(win, win->pm, dx, dy, dw, dh, True, 0, win->white);
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imlib_context_set_drawable(win->pm);
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imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
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img->dirty = false;
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}
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bool img_fit_win(img_t *img, scalemode_t sm)
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{
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if (img == NULL || img->im == NULL)
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return false;
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img->scalemode = sm;
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return img_fit(img);
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}
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bool img_center(img_t *img)
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{
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int ox, oy;
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if (img == NULL || img->im == NULL || img->win == NULL)
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return false;
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ox = img->x;
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oy = img->y;
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img->x = (img->win->w - img->w * img->zoom) / 2;
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img->y = (img->win->h - img->h * img->zoom) / 2;
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if (ox != img->x || oy != img->y) {
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img->dirty = true;
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return true;
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} else {
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return false;
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}
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}
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|
|
|
bool img_zoom(img_t *img, float z)
|
|
{
|
|
if (img == NULL || img->im == NULL || img->win == NULL)
|
|
return false;
|
|
|
|
z = MAX(z, zoom_min);
|
|
z = MIN(z, zoom_max);
|
|
|
|
img->scalemode = SCALE_ZOOM;
|
|
|
|
if (zoomdiff(z, img->zoom) != 0) {
|
|
img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * z / img->zoom;
|
|
img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * z / img->zoom;
|
|
img->zoom = z;
|
|
img->checkpan = true;
|
|
img->dirty = true;
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool img_zoom_in(img_t *img)
|
|
{
|
|
int i;
|
|
float z;
|
|
|
|
if (img == NULL || img->im == NULL)
|
|
return false;
|
|
|
|
for (i = 1; i < ARRLEN(zoom_levels); i++) {
|
|
z = zoom_levels[i] / 100.0;
|
|
if (zoomdiff(z, img->zoom) > 0)
|
|
return img_zoom(img, z);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool img_zoom_out(img_t *img)
|
|
{
|
|
int i;
|
|
float z;
|
|
|
|
if (img == NULL || img->im == NULL)
|
|
return false;
|
|
|
|
for (i = ARRLEN(zoom_levels) - 2; i >= 0; i--) {
|
|
z = zoom_levels[i] / 100.0;
|
|
if (zoomdiff(z, img->zoom) < 0)
|
|
return img_zoom(img, z);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool img_move(img_t *img, float dx, float dy)
|
|
{
|
|
float ox, oy;
|
|
|
|
if (img == NULL || img->im == NULL)
|
|
return false;
|
|
|
|
ox = img->x;
|
|
oy = img->y;
|
|
|
|
img->x += dx;
|
|
img->y += dy;
|
|
|
|
img_check_pan(img, true);
|
|
|
|
if (ox != img->x || oy != img->y) {
|
|
img->dirty = true;
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool img_pan(img_t *img, direction_t dir, int d)
|
|
{
|
|
/* d < 0: screen-wise
|
|
* d = 0: 1/5 of screen
|
|
* d > 0: num of pixels
|
|
*/
|
|
float x, y;
|
|
|
|
if (img == NULL || img->im == NULL || img->win == NULL)
|
|
return false;
|
|
|
|
if (d > 0) {
|
|
x = y = MAX(1, (float) d * img->zoom);
|
|
} else {
|
|
x = img->win->w / (d < 0 ? 1 : 5);
|
|
y = img->win->h / (d < 0 ? 1 : 5);
|
|
}
|
|
|
|
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_edge(img_t *img, direction_t dir)
|
|
{
|
|
int ox, oy;
|
|
|
|
if (img == NULL || img->im == NULL || img->win == NULL)
|
|
return false;
|
|
|
|
ox = img->x;
|
|
oy = img->y;
|
|
|
|
switch (dir) {
|
|
case DIR_LEFT:
|
|
img->x = 0;
|
|
break;
|
|
case DIR_RIGHT:
|
|
img->x = img->win->w - img->w * img->zoom;
|
|
break;
|
|
case DIR_UP:
|
|
img->y = 0;
|
|
break;
|
|
case DIR_DOWN:
|
|
img->y = img->win->h - img->h * img->zoom;
|
|
break;
|
|
}
|
|
|
|
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)
|
|
{
|
|
int ox, oy, tmp;
|
|
|
|
if (img == NULL || img->im == NULL || img->win == NULL)
|
|
return;
|
|
|
|
imlib_context_set_image(img->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)
|
|
{
|
|
if (img == NULL || img->im == NULL)
|
|
return;
|
|
|
|
imlib_context_set_image(img->im);
|
|
|
|
switch (d) {
|
|
case FLIP_HORIZONTAL:
|
|
imlib_image_flip_horizontal();
|
|
break;
|
|
case FLIP_VERTICAL:
|
|
imlib_image_flip_vertical();
|
|
break;
|
|
}
|
|
img->dirty = true;
|
|
}
|
|
|
|
void img_toggle_antialias(img_t *img)
|
|
{
|
|
if (img == NULL || img->im == NULL)
|
|
return;
|
|
|
|
img->aa = !img->aa;
|
|
imlib_context_set_image(img->im);
|
|
imlib_context_set_anti_alias(img->aa);
|
|
img->dirty = true;
|
|
}
|
|
|
|
bool img_change_gamma(img_t *img, int d)
|
|
{
|
|
/* d < 0: decrease gamma
|
|
* d = 0: reset gamma
|
|
* d > 0: increase gamma
|
|
*/
|
|
int gamma;
|
|
|
|
if (img == NULL || img->im == NULL)
|
|
return false;
|
|
|
|
if (d == 0)
|
|
gamma = 0;
|
|
else if (d < 0)
|
|
gamma = MAX(-GAMMA_RANGE, img->gamma - 1);
|
|
else
|
|
gamma = MIN(+GAMMA_RANGE, img->gamma + 1);
|
|
|
|
if (img->gamma != gamma) {
|
|
img->gamma = gamma;
|
|
img_apply_gamma(img);
|
|
img->dirty = true;
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool img_frame_goto(img_t *img, int n)
|
|
{
|
|
if (img == NULL || img->im == NULL)
|
|
return false;
|
|
if (n < 0 || n >= img->multi.cnt || 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 == NULL|| img->im == NULL || img->multi.cnt == 0 || d == 0)
|
|
return false;
|
|
|
|
d += img->multi.sel;
|
|
if (d < 0)
|
|
d = 0;
|
|
else if (d >= img->multi.cnt)
|
|
d = img->multi.cnt - 1;
|
|
|
|
return img_frame_goto(img, d);
|
|
}
|
|
|
|
bool img_frame_animate(img_t *img, bool restart)
|
|
{
|
|
if (img == NULL || img->im == NULL || img->multi.cnt == 0)
|
|
return false;
|
|
|
|
if (img->multi.sel + 1 >= img->multi.cnt) {
|
|
if (restart || GIF_LOOP) {
|
|
img_frame_goto(img, 0);
|
|
} else {
|
|
img->multi.animate = false;
|
|
return false;
|
|
}
|
|
} else if (!restart) {
|
|
img_frame_goto(img, img->multi.sel + 1);
|
|
}
|
|
img->multi.animate = true;
|
|
img->dirty = true;
|
|
|
|
return true;
|
|
}
|