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"
26 #include "image-load.h"
28 struct ImageLoaderZXSCR {
29 ImageLoaderBackendCbAreaUpdated area_updated_cb;
30 ImageLoaderBackendCbSize size_cb;
31 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
34 guint requested_width;
35 guint requested_height;
39 const guchar palette[2][8][3] = {
61 static void free_buffer(guchar *pixels, gpointer)
66 static gboolean image_loader_zxscr_load(gpointer loader, const guchar *buf, gsize count, GError **)
68 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
83 if (count != 6144 && count != 6912)
85 log_printf("Error: zxscr reader error\n");
92 pixels = static_cast<guint8 *>(g_try_malloc(width * height * 3));
96 log_printf("Error: zxscr reader error\n");
100 ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE, 8, width, height, width * 3, free_buffer, nullptr);
105 DEBUG_1("Insufficient memory to open ZXSCR file");
108 //let's decode screen
109 for (row = 0; row < 24; row++)
110 for (col = 0; col < 32; col++)
114 //if we have pixels only, make default white ink on black paper
121 attr = buf[6144 + row * 32 + col];
122 bright = (attr >> 6) & 0x01;
124 paper = ((attr >> 3) & 0x07);
126 ptr = pixels + (row * 256 + col) * 8 * 3;
128 for (mrow = 0; mrow < 8; mrow ++)
130 pxs = buf[(row / 8) * 2048 + mrow * 256 + (row % 8) * 32 + col];
131 for (i = 0; i < 8; i++)
135 *ptr++ = palette[bright][ink][0]; //r
136 *ptr++ = palette[bright][ink][1]; //g
137 *ptr++ = palette[bright][ink][2]; //b
141 *ptr++ = palette[bright][paper][0];
142 *ptr++ = palette[bright][paper][1];
143 *ptr++ = palette[bright][paper][2];
151 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
156 static gpointer image_loader_zxscr_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
158 auto loader = g_new0(ImageLoaderZXSCR, 1);
159 loader->area_updated_cb = area_updated_cb;
160 loader->size_cb = size_cb;
161 loader->area_prepared_cb = area_prepared_cb;
166 static void image_loader_zxscr_set_size(gpointer loader, int width, int height)
168 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
169 ld->requested_width = width;
170 ld->requested_height = height;
173 static GdkPixbuf *image_loader_zxscr_get_pixbuf(gpointer loader)
175 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
179 static gchar *image_loader_zxscr_get_format_name(gpointer)
181 return g_strdup("zxscr");
184 static gchar **image_loader_zxscr_get_format_mime_types(gpointer)
186 static const gchar *mime[] = {"application/octet-stream", nullptr};
187 return g_strdupv(const_cast<gchar **>(mime));
190 static gboolean image_loader_zxscr_close(gpointer, GError **)
195 static void image_loader_zxscr_abort(gpointer loader)
197 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
201 static void image_loader_zxscr_free(gpointer loader)
203 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
204 if (ld->pixbuf) g_object_unref(ld->pixbuf);
208 void image_loader_backend_set_zxscr(ImageLoaderBackend *funcs)
210 funcs->loader_new = image_loader_zxscr_new;
211 funcs->set_size = image_loader_zxscr_set_size;
212 funcs->load = image_loader_zxscr_load;
213 funcs->write = nullptr;
214 funcs->get_pixbuf = image_loader_zxscr_get_pixbuf;
215 funcs->close = image_loader_zxscr_close;
216 funcs->abort = image_loader_zxscr_abort;
217 funcs->free = image_loader_zxscr_free;
218 funcs->get_format_name = image_loader_zxscr_get_format_name;
219 funcs->get_format_mime_types = image_loader_zxscr_get_format_mime_types;
221 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */