2 * Copyright (C) 2021 - The Geeqie Team
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "image-load.h"
24 #include "image_load_zxscr.h"
26 typedef struct _ImageLoaderZXSCR ImageLoaderZXSCR;
27 struct _ImageLoaderZXSCR {
28 ImageLoaderBackendCbAreaUpdated area_updated_cb;
29 ImageLoaderBackendCbSize size_cb;
30 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
33 guint requested_width;
34 guint requested_height;
38 const guchar palette[2][8][3] = {
60 static void free_buffer(guchar *pixels, gpointer data)
65 static gboolean image_loader_zxscr_load(gpointer loader, const guchar *buf, gsize count, GError **error)
67 ImageLoaderZXSCR *ld = (ImageLoaderZXSCR *) loader;
70 gint row, col, mrow, pxs, i;
71 guint8 attr, bright, ink, paper;
74 if (count != 6144 && count != 6912)
76 log_printf("Error: zxscr reader error\n");
83 pixels = g_try_malloc(width * height * 3);
87 log_printf("Error: zxscr reader error\n");
91 ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE, 8, width, height, width * 3, free_buffer, NULL);
96 DEBUG_1("Insufficient memory to open ZXSCR file");
100 for (row = 0; row < 24; row++)
101 for (col = 0; col < 32; col++)
105 //if we have pixels only, make default white ink on black paper
112 attr = buf[6144 + row * 32 + col];
113 bright = (attr >> 6) & 0x01;
115 paper = ((attr >> 3) & 0x07);
117 ptr = pixels + (row * 256 + col) * 8 * 3;
119 for (mrow = 0; mrow < 8; mrow ++)
121 pxs = buf[(row / 8) * 2048 + mrow * 256 + (row % 8) * 32 + col];
122 for (i = 0; i < 8; i++)
126 *ptr++ = palette[bright][ink][0]; //r
127 *ptr++ = palette[bright][ink][1]; //g
128 *ptr++ = palette[bright][ink][2]; //b
132 *ptr++ = palette[bright][paper][0];
133 *ptr++ = palette[bright][paper][1];
134 *ptr++ = palette[bright][paper][2];
142 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
147 static gpointer image_loader_zxscr_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
149 ImageLoaderZXSCR *loader = g_new0(ImageLoaderZXSCR, 1);
150 loader->area_updated_cb = area_updated_cb;
151 loader->size_cb = size_cb;
152 loader->area_prepared_cb = area_prepared_cb;
154 return (gpointer) loader;
157 static void image_loader_zxscr_set_size(gpointer loader, int width, int height)
159 ImageLoaderZXSCR *ld = (ImageLoaderZXSCR *) loader;
160 ld->requested_width = width;
161 ld->requested_height = height;
164 static GdkPixbuf *image_loader_zxscr_get_pixbuf(gpointer loader)
166 ImageLoaderZXSCR *ld = (ImageLoaderZXSCR *) loader;
170 static gchar *image_loader_zxscr_get_format_name(gpointer loader)
172 return g_strdup("zxscr");
175 static gchar **image_loader_zxscr_get_format_mime_types(gpointer loader)
177 static gchar *mime[] = {"application/octet-stream", NULL};
178 return g_strdupv(mime);
181 static gboolean image_loader_zxscr_close(gpointer loader, GError **error)
186 static void image_loader_zxscr_abort(gpointer loader)
188 ImageLoaderZXSCR *ld = (ImageLoaderZXSCR *) loader;
192 static void image_loader_zxscr_free(gpointer loader)
194 ImageLoaderZXSCR *ld = (ImageLoaderZXSCR *) loader;
195 if (ld->pixbuf) g_object_unref(ld->pixbuf);
199 void image_loader_backend_set_zxscr(ImageLoaderBackend *funcs)
201 funcs->loader_new = image_loader_zxscr_new;
202 funcs->set_size = image_loader_zxscr_set_size;
203 funcs->load = image_loader_zxscr_load;
205 funcs->get_pixbuf = image_loader_zxscr_get_pixbuf;
206 funcs->close = image_loader_zxscr_close;
207 funcs->abort = image_loader_zxscr_abort;
208 funcs->free = image_loader_zxscr_free;
209 funcs->get_format_name = image_loader_zxscr_get_format_name;
210 funcs->get_format_mime_types = image_loader_zxscr_get_format_mime_types;
212 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */