--- /dev/null
+/*
+ * Copyright (C) 2020 The Geeqie Team
+ *
+ * Authors: Colin Clark
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* FIXME: This is just a copy of image_load_jpeg.c, with an adjusted
+ * start address for a .cr3 file
+ */
+#include "main.h"
+
+#include "image-load.h"
+#include "image_load_cr3.h"
+#include "jpeg_parser.h"
+
+#ifdef HAVE_JPEG
+
+#include <setjmp.h>
+#include <jpeglib.h>
+#include <jerror.h>
+
+typedef struct _ImageLoaderJpeg ImageLoaderJpeg;
+struct _ImageLoaderJpeg {
+ ImageLoaderBackendCbAreaUpdated area_updated_cb;
+ ImageLoaderBackendCbSize size_cb;
+ ImageLoaderBackendCbAreaPrepared area_prepared_cb;
+
+ gpointer data;
+
+ GdkPixbuf *pixbuf;
+ guint requested_width;
+ guint requested_height;
+
+ gboolean abort;
+ gboolean stereo;
+
+};
+
+/* error handler data */
+struct error_handler_data {
+ struct jpeg_error_mgr pub;
+ sigjmp_buf setjmp_buffer;
+ GError **error;
+};
+
+/* explode gray image data from jpeg library into rgb components in pixbuf */
+static void
+explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
+ guchar **lines)
+{
+ gint i, j;
+ guint w;
+
+ g_return_if_fail (cinfo != NULL);
+ g_return_if_fail (cinfo->output_components == 1);
+ g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
+
+ /* Expand grey->colour. Expand from the end of the
+ * memory down, so we can use the same buffer.
+ */
+ w = cinfo->output_width;
+ for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
+ guchar *from, *to;
+
+ from = lines[i] + w - 1;
+ to = lines[i] + (w - 1) * 3;
+ for (j = w - 1; j >= 0; j--) {
+ to[0] = from[0];
+ to[1] = from[0];
+ to[2] = from[0];
+ to -= 3;
+ from--;
+ }
+ }
+}
+
+
+static void
+convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
+ guchar **lines)
+{
+ gint i, j;
+
+ g_return_if_fail (cinfo != NULL);
+ g_return_if_fail (cinfo->output_components == 4);
+ g_return_if_fail (cinfo->out_color_space == JCS_CMYK);
+
+ for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
+ guchar *p;
+
+ p = lines[i];
+ for (j = 0; j < cinfo->output_width; j++) {
+ int c, m, y, k;
+ c = p[0];
+ m = p[1];
+ y = p[2];
+ k = p[3];
+ if (cinfo->saw_Adobe_marker) {
+ p[0] = k*c / 255;
+ p[1] = k*m / 255;
+ p[2] = k*y / 255;
+ }
+ else {
+ p[0] = (255 - k)*(255 - c) / 255;
+ p[1] = (255 - k)*(255 - m) / 255;
+ p[2] = (255 - k)*(255 - y) / 255;
+ }
+ p[3] = 255;
+ p += 4;
+ }
+ }
+}
+
+
+static gpointer image_loader_cr3_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
+{
+ ImageLoaderJpeg *loader = g_new0(ImageLoaderJpeg, 1);
+
+ loader->area_updated_cb = area_updated_cb;
+ loader->size_cb = size_cb;
+ loader->area_prepared_cb = area_prepared_cb;
+ loader->data = data;
+ return (gpointer) loader;
+}
+
+static void
+fatal_error_handler (j_common_ptr cinfo)
+{
+ struct error_handler_data *errmgr;
+ char buffer[JMSG_LENGTH_MAX];
+
+ errmgr = (struct error_handler_data *) cinfo->err;
+
+ /* Create the message */
+ (* cinfo->err->format_message) (cinfo, buffer);
+
+ /* broken check for *error == NULL for robustness against
+ * crappy JPEG library
+ */
+ if (errmgr->error && *errmgr->error == NULL) {
+ g_set_error (errmgr->error,
+ GDK_PIXBUF_ERROR,
+ cinfo->err->msg_code == JERR_OUT_OF_MEMORY
+ ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
+ : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Error interpreting JPEG image file (%s)"),
+ buffer);
+ }
+
+ siglongjmp (errmgr->setjmp_buffer, 1);
+
+ g_assert_not_reached ();
+}
+
+static void
+output_message_handler (j_common_ptr cinfo)
+{
+ /* This method keeps libjpeg from dumping crap to stderr */
+
+ /* do nothing */
+}
+
+
+static void image_loader_cr3_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
+{
+ guchar *lines[4];
+ guchar **lptr;
+ gint i;
+
+ lptr = lines;
+ for (i = 0; i < cinfo->rec_outbuf_height; i++)
+ {
+ *lptr++ = *dptr;
+ *dptr += rowstride;
+ }
+
+ jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
+
+ switch (cinfo->out_color_space)
+ {
+ case JCS_GRAYSCALE:
+ explode_gray_into_buf (cinfo, lines);
+ break;
+ case JCS_RGB:
+ /* do nothing */
+ break;
+ case JCS_CMYK:
+ convert_cmyk_to_rgb (cinfo, lines);
+ break;
+ default:
+ break;
+ }
+}
+
+
+static void init_source (j_decompress_ptr cinfo) {}
+static boolean fill_input_buffer (j_decompress_ptr cinfo)
+{
+ ERREXIT(cinfo, JERR_INPUT_EMPTY);
+ return TRUE;
+}
+static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
+{
+ struct jpeg_source_mgr* src = (struct jpeg_source_mgr*) cinfo->src;
+
+ if (num_bytes > src->bytes_in_buffer)
+ {
+ ERREXIT(cinfo, JERR_INPUT_EOF);
+ }
+ else if (num_bytes > 0)
+ {
+ src->next_input_byte += (size_t) num_bytes;
+ src->bytes_in_buffer -= (size_t) num_bytes;
+ }
+}
+static void term_source (j_decompress_ptr cinfo) {}
+static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
+{
+ struct jpeg_source_mgr* src;
+
+ if (cinfo->src == NULL)
+ { /* first time for this JPEG object? */
+ cinfo->src = (struct jpeg_source_mgr *) (*cinfo->mem->alloc_small) (
+ (j_common_ptr) cinfo, JPOOL_PERMANENT,
+ sizeof(struct jpeg_source_mgr));
+ }
+
+ src = (struct jpeg_source_mgr*) cinfo->src;
+ src->init_source = init_source;
+ src->fill_input_buffer = fill_input_buffer;
+ src->skip_input_data = skip_input_data;
+ src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
+ src->term_source = term_source;
+ src->bytes_in_buffer = nbytes;
+ src->next_input_byte = (JOCTET*)buffer;
+}
+
+
+static gboolean image_loader_cr3_load (gpointer loader, const guchar *buf, gsize count, GError **error)
+{
+ ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
+ struct jpeg_decompress_struct cinfo;
+ struct jpeg_decompress_struct cinfo2;
+ guchar *dptr, *dptr2;
+ guint rowstride;
+ guchar *stereo_buf2 = NULL;
+ guint stereo_length = 0;
+
+ struct error_handler_data jerr;
+
+/* FIXME: Just start search at where full size jpeg should be,
+ * / then search through the file looking for a jpeg end-marker
+ */
+ guint64 align_buf;
+ gboolean found = FALSE;
+ gint i;
+
+ memcpy(&align_buf, &buf[0xf2], sizeof(guint64));
+ buf = buf + GUINT64_FROM_BE(align_buf) + 0x10;
+
+ if (memcmp(&buf[0], "\xFF\xD8", 2) == 0)
+ {
+ i = 0;
+ while (!found )
+ {
+ if (memcmp(&buf[ i], "\xFF\xD9", 2) == 0)
+ {
+ found = TRUE;
+ }
+ i = i + 1;
+ }
+ }
+ else
+ {
+ return FALSE;
+ }
+
+ count = i;
+
+ lj->stereo = FALSE;
+
+ MPOData *mpo = jpeg_get_mpo_data(buf, count);
+ if (mpo && mpo->num_images > 1)
+ {
+ guint i;
+ gint idx1 = -1, idx2 = -1;
+ guint num2 = 1;
+
+ for (i = 0; i < mpo->num_images; i++)
+ {
+ if (mpo->images[i].type_code == 0x20002)
+ {
+ if (mpo->images[i].MPIndividualNum == 1)
+ {
+ idx1 = i;
+ }
+ else if (mpo->images[i].MPIndividualNum > num2)
+ {
+ idx2 = i;
+ num2 = mpo->images[i].MPIndividualNum;
+ }
+ }
+ }
+
+ if (idx1 >= 0 && idx2 >= 0)
+ {
+ lj->stereo = TRUE;
+ stereo_buf2 = (unsigned char *)buf + mpo->images[idx2].offset;
+ stereo_length = mpo->images[idx2].length;
+ buf = (unsigned char *)buf + mpo->images[idx1].offset;
+ count = mpo->images[idx1].length;
+ }
+ }
+ jpeg_mpo_data_free(mpo);
+
+ /* setup error handler */
+ cinfo.err = jpeg_std_error (&jerr.pub);
+ if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
+ jerr.pub.error_exit = fatal_error_handler;
+ jerr.pub.output_message = output_message_handler;
+
+ jerr.error = error;
+
+
+ if (setjmp(jerr.setjmp_buffer))
+ {
+ /* If we get here, the JPEG code has signaled an error.
+ * We need to clean up the JPEG object, close the input file, and return.
+ */
+ jpeg_destroy_decompress(&cinfo);
+ if (lj->stereo) jpeg_destroy_decompress(&cinfo2);
+ return FALSE;
+ }
+
+ jpeg_create_decompress(&cinfo);
+
+ set_mem_src(&cinfo, (unsigned char *)buf, count);
+
+
+ jpeg_read_header(&cinfo, TRUE);
+
+ if (lj->stereo)
+ {
+ jpeg_create_decompress(&cinfo2);
+ set_mem_src(&cinfo2, stereo_buf2, stereo_length);
+ jpeg_read_header(&cinfo2, TRUE);
+
+ if (cinfo.image_width != cinfo2.image_width ||
+ cinfo.image_height != cinfo2.image_height)
+ {
+ DEBUG_1("stereo data with different size");
+ jpeg_destroy_decompress(&cinfo2);
+ lj->stereo = FALSE;
+ }
+ }
+
+
+
+ lj->requested_width = lj->stereo ? cinfo.image_width * 2: cinfo.image_width;
+ lj->requested_height = cinfo.image_height;
+ lj->size_cb(loader, lj->requested_width, lj->requested_height, lj->data);
+
+ cinfo.scale_num = 1;
+ for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
+ jpeg_calc_output_dimensions(&cinfo);
+ if (cinfo.output_width < (lj->stereo ? lj->requested_width / 2 : lj->requested_width) || cinfo.output_height < lj->requested_height) {
+ cinfo.scale_denom /= 2;
+ break;
+ }
+ }
+ jpeg_calc_output_dimensions(&cinfo);
+ if (lj->stereo)
+ {
+ cinfo2.scale_num = cinfo.scale_num;
+ cinfo2.scale_denom = cinfo.scale_denom;
+ jpeg_calc_output_dimensions(&cinfo2);
+ jpeg_start_decompress(&cinfo2);
+ }
+
+
+ jpeg_start_decompress(&cinfo);
+
+
+ if (lj->stereo)
+ {
+ if (cinfo.output_width != cinfo2.output_width ||
+ cinfo.output_height != cinfo2.output_height ||
+ cinfo.out_color_components != cinfo2.out_color_components)
+ {
+ DEBUG_1("stereo data with different output size");
+ jpeg_destroy_decompress(&cinfo2);
+ lj->stereo = FALSE;
+ }
+ }
+
+
+ lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+ cinfo.out_color_components == 4 ? TRUE : FALSE,
+ 8, lj->stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
+
+ if (!lj->pixbuf)
+ {
+ jpeg_destroy_decompress (&cinfo);
+ if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
+ return 0;
+ }
+ if (lj->stereo) g_object_set_data(G_OBJECT(lj->pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
+ lj->area_prepared_cb(loader, lj->data);
+
+ rowstride = gdk_pixbuf_get_rowstride(lj->pixbuf);
+ dptr = gdk_pixbuf_get_pixels(lj->pixbuf);
+ dptr2 = gdk_pixbuf_get_pixels(lj->pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
+
+
+ while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
+ {
+ guint scanline = cinfo.output_scanline;
+ image_loader_cr3_read_scanline(&cinfo, &dptr, rowstride);
+ lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
+ if (lj->stereo)
+ {
+ guint scanline = cinfo2.output_scanline;
+ image_loader_cr3_read_scanline(&cinfo2, &dptr2, rowstride);
+ lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
+ }
+ }
+
+ jpeg_finish_decompress(&cinfo);
+ jpeg_destroy_decompress(&cinfo);
+ if (lj->stereo)
+ {
+ jpeg_finish_decompress(&cinfo);
+ jpeg_destroy_decompress(&cinfo);
+ }
+
+ return TRUE;
+}
+
+static void image_loader_cr3_set_size(gpointer loader, int width, int height)
+{
+ ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
+ lj->requested_width = width;
+ lj->requested_height = height;
+}
+
+static GdkPixbuf* image_loader_cr3_get_pixbuf(gpointer loader)
+{
+ ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
+ return lj->pixbuf;
+}
+
+static gchar* image_loader_cr3_get_format_name(gpointer loader)
+{
+ return g_strdup("cr3");
+}
+static gchar** image_loader_cr3_get_format_mime_types(gpointer loader)
+{
+ static gchar *mime[] = {"image/x-canon-cr3", NULL};
+ return g_strdupv(mime);
+}
+
+static gboolean image_loader_cr3_close(gpointer loader, GError **error)
+{
+ return TRUE;
+}
+
+static void image_loader_cr3_abort(gpointer loader)
+{
+ ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
+ lj->abort = TRUE;
+}
+
+static void image_loader_cr3_free(gpointer loader)
+{
+ ImageLoaderJpeg *lj = (ImageLoaderJpeg *) loader;
+ if (lj->pixbuf) g_object_unref(lj->pixbuf);
+ g_free(lj);
+}
+
+
+void image_loader_backend_set_cr3(ImageLoaderBackend *funcs)
+{
+ funcs->loader_new = image_loader_cr3_new;
+ funcs->set_size = image_loader_cr3_set_size;
+ funcs->load = image_loader_cr3_load;
+ funcs->write = NULL;
+ funcs->get_pixbuf = image_loader_cr3_get_pixbuf;
+ funcs->close = image_loader_cr3_close;
+ funcs->abort = image_loader_cr3_abort;
+ funcs->free = image_loader_cr3_free;
+
+ funcs->get_format_name = image_loader_cr3_get_format_name;
+ funcs->get_format_mime_types = image_loader_cr3_get_format_mime_types;
+}
+
+
+
+#endif
+
+
+/* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */
projects / geeqie.git / commitdiff