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"
30 struct ImageLoaderZXSCR {
31 ImageLoaderBackendCbAreaUpdated area_updated_cb;
32 ImageLoaderBackendCbSize size_cb;
33 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
36 guint requested_width;
37 guint requested_height;
41 const guchar palette[2][8][3] = {
63 static void free_buffer(guchar *pixels, gpointer)
68 static gboolean image_loader_zxscr_load(gpointer loader, const guchar *buf, gsize count, GError **)
70 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
85 if (count != 6144 && count != 6912)
87 log_printf("Error: zxscr reader error\n");
94 pixels = static_cast<guint8 *>(g_try_malloc(width * height * 3));
98 log_printf("Error: zxscr reader error\n");
102 ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE, 8, width, height, width * 3, free_buffer, nullptr);
107 DEBUG_1("Insufficient memory to open ZXSCR file");
110 //let's decode screen
111 for (row = 0; row < 24; row++)
112 for (col = 0; col < 32; col++)
116 //if we have pixels only, make default white ink on black paper
123 attr = buf[6144 + row * 32 + col];
124 bright = (attr >> 6) & 0x01;
126 paper = ((attr >> 3) & 0x07);
128 ptr = pixels + (row * 256 + col) * 8 * 3;
130 for (mrow = 0; mrow < 8; mrow ++)
132 pxs = buf[(row / 8) * 2048 + mrow * 256 + (row % 8) * 32 + col];
133 for (i = 0; i < 8; i++)
137 *ptr++ = palette[bright][ink][0]; //r
138 *ptr++ = palette[bright][ink][1]; //g
139 *ptr++ = palette[bright][ink][2]; //b
143 *ptr++ = palette[bright][paper][0];
144 *ptr++ = palette[bright][paper][1];
145 *ptr++ = palette[bright][paper][2];
153 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
158 static gpointer image_loader_zxscr_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
160 auto loader = g_new0(ImageLoaderZXSCR, 1);
161 loader->area_updated_cb = area_updated_cb;
162 loader->size_cb = size_cb;
163 loader->area_prepared_cb = area_prepared_cb;
168 static void image_loader_zxscr_set_size(gpointer loader, int width, int height)
170 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
171 ld->requested_width = width;
172 ld->requested_height = height;
175 static GdkPixbuf *image_loader_zxscr_get_pixbuf(gpointer loader)
177 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
181 static gchar *image_loader_zxscr_get_format_name(gpointer)
183 return g_strdup("zxscr");
186 static gchar **image_loader_zxscr_get_format_mime_types(gpointer)
188 static const gchar *mime[] = {"application/octet-stream", nullptr};
189 return g_strdupv(const_cast<gchar **>(mime));
192 static gboolean image_loader_zxscr_close(gpointer, GError **)
197 static void image_loader_zxscr_abort(gpointer loader)
199 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
203 static void image_loader_zxscr_free(gpointer loader)
205 auto ld = static_cast<ImageLoaderZXSCR *>(loader);
206 if (ld->pixbuf) g_object_unref(ld->pixbuf);
210 void image_loader_backend_set_zxscr(ImageLoaderBackend *funcs)
212 funcs->loader_new = image_loader_zxscr_new;
213 funcs->set_size = image_loader_zxscr_set_size;
214 funcs->load = image_loader_zxscr_load;
215 funcs->write = nullptr;
216 funcs->get_pixbuf = image_loader_zxscr_get_pixbuf;
217 funcs->close = image_loader_zxscr_close;
218 funcs->abort = image_loader_zxscr_abort;
219 funcs->free = image_loader_zxscr_free;
220 funcs->get_format_name = image_loader_zxscr_get_format_name;
221 funcs->get_format_mime_types = image_loader_zxscr_get_format_mime_types;
223 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */