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.
21 #include "image-load-zxscr.h"
23 #include <gdk-pixbuf/gdk-pixbuf.h>
24 #include <glib-object.h>
28 #include "image-load.h"
33 struct ImageLoaderZXSCR {
34 ImageLoaderBackendCbAreaUpdated area_updated_cb;
35 ImageLoaderBackendCbSize size_cb;
36 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
39 guint requested_width;
40 guint requested_height;
44 constexpr guchar palette[2][8][3] = {
66 void free_buffer(guchar *pixels, gpointer)
71 gboolean image_loader_zxscr_write(gpointer loader, const guchar *buf, gsize &chunk_size, gsize count, GError **)
73 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
88 if (count != 6144 && count != 6912)
90 log_printf("Error: zxscr reader error\n");
97 pixels = static_cast<guint8 *>(g_try_malloc(width * height * 3));
101 log_printf("Error: zxscr reader error\n");
105 ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE, 8, width, height, width * 3, free_buffer, nullptr);
110 DEBUG_1("Insufficient memory to open ZXSCR file");
113 //let's decode screen
114 for (row = 0; row < 24; row++)
115 for (col = 0; col < 32; col++)
119 //if we have pixels only, make default white ink on black paper
126 attr = buf[6144 + row * 32 + col];
127 bright = (attr >> 6) & 0x01;
129 paper = ((attr >> 3) & 0x07);
131 ptr = pixels + (row * 256 + col) * 8 * 3;
133 for (mrow = 0; mrow < 8; mrow ++)
135 pxs = buf[(row / 8) * 2048 + mrow * 256 + (row % 8) * 32 + col];
136 for (i = 0; i < 8; i++)
140 *ptr++ = palette[bright][ink][0]; //r
141 *ptr++ = palette[bright][ink][1]; //g
142 *ptr++ = palette[bright][ink][2]; //b
146 *ptr++ = palette[bright][paper][0];
147 *ptr++ = palette[bright][paper][1];
148 *ptr++ = palette[bright][paper][2];
156 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
162 gpointer image_loader_zxscr_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
164 auto loader = g_new0(ImageLoaderZXSCR, 1);
165 loader->area_updated_cb = area_updated_cb;
166 loader->size_cb = size_cb;
167 loader->area_prepared_cb = area_prepared_cb;
172 void image_loader_zxscr_set_size(gpointer loader, int width, int height)
174 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
175 ld->requested_width = width;
176 ld->requested_height = height;
179 GdkPixbuf *image_loader_zxscr_get_pixbuf(gpointer loader)
181 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
185 gchar *image_loader_zxscr_get_format_name(gpointer)
187 return g_strdup("zxscr");
190 gchar **image_loader_zxscr_get_format_mime_types(gpointer)
192 static const gchar *mime[] = {"application/octet-stream", nullptr};
193 return g_strdupv(const_cast<gchar **>(mime));
196 gboolean image_loader_zxscr_close(gpointer, GError **)
201 void image_loader_zxscr_abort(gpointer loader)
203 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
207 void image_loader_zxscr_free(gpointer loader)
209 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
210 if (ld->pixbuf) g_object_unref(ld->pixbuf);
216 void image_loader_backend_set_zxscr(ImageLoaderBackend *funcs)
218 funcs->loader_new = image_loader_zxscr_new;
219 funcs->set_size = image_loader_zxscr_set_size;
220 funcs->write = image_loader_zxscr_write;
221 funcs->get_pixbuf = image_loader_zxscr_get_pixbuf;
222 funcs->close = image_loader_zxscr_close;
223 funcs->abort = image_loader_zxscr_abort;
224 funcs->free = image_loader_zxscr_free;
225 funcs->get_format_name = image_loader_zxscr_get_format_name;
226 funcs->get_format_mime_types = image_loader_zxscr_get_format_mime_types;
228 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */