614 lines
13 KiB
C
614 lines
13 KiB
C
/* sxiv: image.c
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* Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301, USA.
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*/
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#define _IMAGE_CONFIG
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#include <unistd.h>
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#ifdef HAVE_GIFLIB
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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 <gif_lib.h>
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#endif
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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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enum { MIN_GIF_DELAY = 50 };
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int zl_cnt;
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float zoom_min;
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float zoom_max;
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void img_init(img_t *img, win_t *win) {
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zl_cnt = sizeof(zoom_levels) / sizeof(zoom_levels[0]);
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zoom_min = zoom_levels[0] / 100.0;
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zoom_max = zoom_levels[zl_cnt - 1] / 100.0;
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if (img) {
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img->im = NULL;
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img->multi.cap = img->multi.cnt = 0;
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img->multi.animate = 0;
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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->aa = options->aa;
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img->alpha = 1;
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}
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if (win) {
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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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}
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}
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#ifdef HAVE_GIFLIB
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int img_load_gif(img_t *img, const fileinfo_t *file) {
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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 intoffset[] = { 0, 4, 2, 1 };
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int intjump[] = { 8, 8, 4, 2 };
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int err = 0, transp = -1;
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unsigned int delay = 0;
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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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gif = DGifOpenFileName(file->path);
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if (!gif) {
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warn("could not open gif file: %s", file->name);
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return 0;
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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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do {
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if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
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warn("could not open gif file: %s", file->name);
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err = 1;
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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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}
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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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warn("could not open gif frame # %d: %s", img->multi.cnt, file->name);
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err = 1;
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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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if (transp >= 0 && prev_frame)
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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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} else if (rows[i-y][j-x] == transp) {
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if (prev_frame)
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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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} 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) {
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warn("could not open gif frame # %d: %s", img->multi.cnt, file->name);
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err = 1;
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break;
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}
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imlib_context_set_image(im);
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prev_frame = imlib_image_get_data_for_reading_only();
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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 (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 && 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 {
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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->multi.animate = 0;
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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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int img_load(img_t *img, const fileinfo_t *file) {
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const char *fmt;
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if (!img || !file || !file->name || !file->path)
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return 0;
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if (access(file->path, R_OK) || !(img->im = imlib_load_image(file->path))) {
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warn("could not open image: %s", file->name);
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return 0;
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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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imlib_context_set_anti_alias(img->aa);
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fmt = imlib_image_format();
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#ifdef HAVE_GIFLIB
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if (!strcmp(fmt, "gif"))
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img_load_gif(img, file);
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#else
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/* avoid unused-but-set-variable warning */
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(void) fmt;
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#endif
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img->scalemode = options->scalemode;
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img->re = 0;
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img->checkpan = 0;
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img->w = imlib_image_get_width();
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img->h = imlib_image_get_height();
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return 1;
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}
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void img_close(img_t *img, int decache) {
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int i;
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if (!img)
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return;
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if (img->multi.cnt) {
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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) {
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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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}
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void img_check_pan(img_t *img, win_t *win) {
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if (!img || !win)
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return;
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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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}
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int img_fit(img_t *img, win_t *win) {
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float oz, zw, zh;
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if (!img || !win)
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return 0;
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oz = img->zoom;
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zw = (float) win->w / (float) img->w;
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zh = (float) win->h / (float) img->h;
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img->zoom = MIN(zw, zh);
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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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return oz != img->zoom;
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}
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void img_render(img_t *img, 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 || !img->im || !win)
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return;
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if (img->scalemode != SCALE_ZOOM) {
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img_fit(img, win);
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if (img->scalemode == SCALE_DOWN && img->zoom > 1.0)
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img->zoom = 1.0;
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}
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if (!img->re) {
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/* rendered for the first time */
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img->re = 1;
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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, win);
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img->checkpan = 0;
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}
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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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if (imlib_image_has_alpha() && !img->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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win_draw(win);
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}
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int img_fit_win(img_t *img, win_t *win) {
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if (!img || !img->im || !win)
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return 0;
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img->scalemode = SCALE_FIT;
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return img_fit(img, win);
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}
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int img_center(img_t *img, win_t *win) {
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int ox, oy;
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if (!img || !win)
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return 0;
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ox = img->x;
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oy = img->y;
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img->x = (win->w - img->w * img->zoom) / 2;
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img->y = (win->h - img->h * img->zoom) / 2;
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return ox != img->x || oy != img->y;
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}
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int img_zoom(img_t *img, win_t *win, float z) {
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if (!img || !img->im || !win)
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return 0;
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z = MAX(z, zoom_min);
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z = MIN(z, zoom_max);
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img->scalemode = SCALE_ZOOM;
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if (z != img->zoom) {
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img->x = win->w / 2 - (win->w / 2 - img->x) * z / img->zoom;
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img->y = win->h / 2 - (win->h / 2 - img->y) * z / img->zoom;
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img->zoom = z;
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img->checkpan = 1;
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return 1;
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} else {
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return 0;
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}
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}
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int img_zoom_in(img_t *img, win_t *win) {
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int i;
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if (!img || !img->im || !win)
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return 0;
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for (i = 1; i < zl_cnt; i++) {
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if (zoom_levels[i] > img->zoom * 100.0)
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return img_zoom(img, win, zoom_levels[i] / 100.0);
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}
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return 0;
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}
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int img_zoom_out(img_t *img, win_t *win) {
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int i;
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if (!img || !img->im || !win)
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return 0;
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for (i = zl_cnt - 2; i >= 0; i--) {
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if (zoom_levels[i] < img->zoom * 100.0)
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return img_zoom(img, win, zoom_levels[i] / 100.0);
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}
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return 0;
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}
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int img_move(img_t *img, win_t *win, int dx, int dy) {
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int ox, oy;
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if (!img || !img->im || !win)
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return 0;
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ox = img->x;
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oy = img->y;
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img->x += dx;
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img->y += dy;
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img_check_pan(img, win);
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return ox != img->x || oy != img->y;
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}
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int img_pan(img_t *img, win_t *win, direction_t dir, int screen) {
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if (!img || !img->im || !win)
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return 0;
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switch (dir) {
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case DIR_LEFT:
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return img_move(img, win, win->w / (screen ? 1 : 5), 0);
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case DIR_RIGHT:
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return img_move(img, win, win->w / (screen ? 1 : 5) * -1, 0);
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case DIR_UP:
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return img_move(img, win, 0, win->h / (screen ? 1 : 5));
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case DIR_DOWN:
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return img_move(img, win, 0, win->h / (screen ? 1 : 5) * -1);
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}
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return 0;
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}
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int img_pan_edge(img_t *img, win_t *win, direction_t dir) {
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int ox, oy;
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if (!img || !img->im || !win)
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return 0;
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ox = img->x;
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oy = img->y;
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switch (dir) {
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case DIR_LEFT:
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img->x = 0;
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break;
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case DIR_RIGHT:
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img->x = win->w - img->w * img->zoom;
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break;
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case DIR_UP:
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img->y = 0;
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break;
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case DIR_DOWN:
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img->y = win->h - img->h * img->zoom;
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break;
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}
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img_check_pan(img, win);
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return ox != img->x || oy != img->y;
|
|
}
|
|
|
|
void img_rotate(img_t *img, win_t *win, int d) {
|
|
int ox, oy, tmp;
|
|
|
|
if (!img || !img->im || !win)
|
|
return;
|
|
|
|
ox = d == 1 ? img->x : win->w - img->x - img->w * img->zoom;
|
|
oy = d == 3 ? img->y : win->h - img->y - img->h * img->zoom;
|
|
|
|
imlib_context_set_image(img->im);
|
|
imlib_image_orientate(d);
|
|
|
|
img->x = oy + (win->w - win->h) / 2;
|
|
img->y = ox + (win->h - win->w) / 2;
|
|
|
|
tmp = img->w;
|
|
img->w = img->h;
|
|
img->h = tmp;
|
|
|
|
img->checkpan = 1;
|
|
}
|
|
|
|
void img_rotate_left(img_t *img, win_t *win) {
|
|
img_rotate(img, win, 3);
|
|
}
|
|
|
|
void img_rotate_right(img_t *img, win_t *win) {
|
|
img_rotate(img, win, 1);
|
|
}
|
|
|
|
void img_toggle_antialias(img_t *img) {
|
|
if (img && img->im) {
|
|
img->aa ^= 1;
|
|
imlib_context_set_image(img->im);
|
|
imlib_context_set_anti_alias(img->aa);
|
|
}
|
|
}
|
|
|
|
int img_frame_goto(img_t *img, int n) {
|
|
if (!img || n < 0 || n >= img->multi.cnt)
|
|
return 0;
|
|
|
|
if (n == img->multi.sel)
|
|
return 0;
|
|
|
|
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 = 1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int img_frame_navigate(img_t *img, int d) {
|
|
if (!img || !img->multi.cnt || !d)
|
|
return 0;
|
|
|
|
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);
|
|
}
|
|
|
|
int img_frame_animate(img_t *img, int restart) {
|
|
if (!img || !img->multi.cnt)
|
|
return 0;
|
|
|
|
if (img->multi.sel + 1 >= img->multi.cnt) {
|
|
if (restart || GIF_LOOP) {
|
|
img_frame_goto(img, 0);
|
|
} else {
|
|
img->multi.animate = 0;
|
|
return 0;
|
|
}
|
|
} else if (!restart) {
|
|
img_frame_goto(img, img->multi.sel + 1);
|
|
}
|
|
|
|
img->multi.animate = 1;
|
|
|
|
return img->multi.frames[img->multi.sel].delay;
|
|
}
|