#include "jpeg-parser.h"
#include "typedefs.h"
-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;
+ GError **error;
};
/* explode gray image data from jpeg library into rgb components in pixbuf */
}
-static gpointer image_loader_jpeg_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
+void ImageLoaderJpeg::init(AreaUpdatedCb area_updated_cb, SizePreparedCb size_prepared_cb, AreaPreparedCb area_prepared_cb, gpointer data)
{
- auto 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 loader;
+ this->area_updated_cb = area_updated_cb;
+ this->size_prepared_cb = size_prepared_cb;
+ this->area_prepared_cb = area_prepared_cb;
+ this->data = data;
}
static void
}
-gboolean image_loader_jpeg_write(gpointer loader, const guchar *buf, gsize &chunk_size, gsize count, GError **error)
+gboolean ImageLoaderJpeg::write(const guchar *buf, gsize &chunk_size, gsize count, GError **error)
{
- auto lj = static_cast<ImageLoaderJpeg *>(loader);
struct jpeg_decompress_struct cinfo;
struct jpeg_decompress_struct cinfo2;
guchar *dptr;
struct error_handler_data jerr;
- lj->stereo = FALSE;
+ stereo = FALSE;
MPOData *mpo = jpeg_get_mpo_data(buf, count);
if (mpo && mpo->num_images > 1)
if (idx1 >= 0 && idx2 >= 0)
{
- lj->stereo = TRUE;
+ stereo = TRUE;
stereo_buf2 = const_cast<unsigned char *>(buf) + mpo->images[idx2].offset;
stereo_length = mpo->images[idx2].length;
buf = const_cast<unsigned char *>(buf) + mpo->images[idx1].offset;
/* setup error handler */
cinfo.err = jpeg_std_error (&jerr.pub);
- if (lj->stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
+ if (stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
jerr.pub.error_exit = fatal_error_handler;
jerr.pub.output_message = output_message_handler;
* 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);
+ if (stereo) jpeg_destroy_decompress(&cinfo2);
return FALSE;
}
jpeg_read_header(&cinfo, TRUE);
- if (lj->stereo)
+ if (stereo)
{
jpeg_create_decompress(&cinfo2);
set_mem_src(&cinfo2, stereo_buf2, stereo_length);
{
DEBUG_1("stereo data with different size");
jpeg_destroy_decompress(&cinfo2);
- lj->stereo = FALSE;
+ 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);
+ requested_width = stereo ? cinfo.image_width * 2: cinfo.image_width;
+ requested_height = cinfo.image_height;
+ size_prepared_cb(nullptr, requested_width, requested_height, 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) {
+ if (cinfo.output_width < (stereo ? requested_width / 2 : requested_width) || cinfo.output_height < requested_height) {
cinfo.scale_denom /= 2;
break;
}
}
jpeg_calc_output_dimensions(&cinfo);
- if (lj->stereo)
+ if (stereo)
{
cinfo2.scale_num = cinfo.scale_num;
cinfo2.scale_denom = cinfo.scale_denom;
jpeg_start_decompress(&cinfo);
- if (lj->stereo)
+ if (stereo)
{
if (cinfo.output_width != cinfo2.output_width ||
cinfo.output_height != cinfo2.output_height ||
{
DEBUG_1("stereo data with different output size");
jpeg_destroy_decompress(&cinfo2);
- lj->stereo = FALSE;
+ stereo = FALSE;
}
}
- lj->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+ 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);
+ 8, stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
- if (!lj->pixbuf)
+ if (!pixbuf)
{
jpeg_destroy_decompress (&cinfo);
- if (lj->stereo) jpeg_destroy_decompress (&cinfo2);
+ if (stereo) jpeg_destroy_decompress (&cinfo2);
return FALSE;
}
- 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);
+ if (stereo) g_object_set_data(G_OBJECT(pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
+ area_prepared_cb(nullptr, 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);
+ rowstride = gdk_pixbuf_get_rowstride(pixbuf);
+ dptr = gdk_pixbuf_get_pixels(pixbuf);
+ dptr2 = gdk_pixbuf_get_pixels(pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
- while (cinfo.output_scanline < cinfo.output_height && !lj->abort)
+ while (cinfo.output_scanline < cinfo.output_height && !aborted)
{
guint scanline = cinfo.output_scanline;
image_loader_jpeg_read_scanline(&cinfo, &dptr, rowstride);
- lj->area_updated_cb(loader, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, lj->data);
- if (lj->stereo)
+ area_updated_cb(nullptr, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, data);
+ if (stereo)
{
guint scanline = cinfo2.output_scanline;
image_loader_jpeg_read_scanline(&cinfo2, &dptr2, rowstride);
- lj->area_updated_cb(loader, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, lj->data);
+ area_updated_cb(nullptr, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, data);
}
}
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
- if (lj->stereo)
+ if (stereo)
{
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
return TRUE;
}
-static void image_loader_jpeg_set_size(gpointer loader, int width, int height)
+void ImageLoaderJpeg::set_size(int width, int height)
{
- auto lj = static_cast<ImageLoaderJpeg *>(loader);
- lj->requested_width = width;
- lj->requested_height = height;
+ requested_width = width;
+ requested_height = height;
}
-static GdkPixbuf* image_loader_jpeg_get_pixbuf(gpointer loader)
+GdkPixbuf *ImageLoaderJpeg::get_pixbuf()
{
- auto lj = static_cast<ImageLoaderJpeg *>(loader);
- return lj->pixbuf;
+ return pixbuf;
}
-static gchar* image_loader_jpeg_get_format_name(gpointer)
+gchar *ImageLoaderJpeg::get_format_name()
{
return g_strdup("jpeg");
}
-static gchar** image_loader_jpeg_get_format_mime_types(gpointer)
+gchar **ImageLoaderJpeg::get_format_mime_types()
{
static const gchar *mime[] = {"image/jpeg", nullptr};
return g_strdupv(const_cast<gchar **>(mime));
}
-static gboolean image_loader_jpeg_close(gpointer, GError **)
-{
- return TRUE;
-}
-
-static void image_loader_jpeg_abort(gpointer loader)
+void ImageLoaderJpeg::abort()
{
- auto lj = static_cast<ImageLoaderJpeg *>(loader);
- lj->abort = TRUE;
+ aborted = TRUE;
}
-static void image_loader_jpeg_free(gpointer loader)
+ImageLoaderJpeg::~ImageLoaderJpeg()
{
- auto lj = static_cast<ImageLoaderJpeg *>(loader);
- if (lj->pixbuf) g_object_unref(lj->pixbuf);
- g_free(lj);
+ if (pixbuf) g_object_unref(pixbuf);
}
-void image_loader_backend_set_jpeg(ImageLoaderBackend *funcs)
+std::unique_ptr<ImageLoaderBackend> get_image_loader_backend_jpeg()
{
- funcs->loader_new = image_loader_jpeg_new;
- funcs->set_size = image_loader_jpeg_set_size;
- funcs->write = image_loader_jpeg_write;
- funcs->get_pixbuf = image_loader_jpeg_get_pixbuf;
- funcs->close = image_loader_jpeg_close;
- funcs->abort = image_loader_jpeg_abort;
- funcs->free = image_loader_jpeg_free;
-
- funcs->get_format_name = image_loader_jpeg_get_format_name;
- funcs->get_format_mime_types = image_loader_jpeg_get_format_mime_types;
+ return std::make_unique<ImageLoaderJpeg>();
}
-
#endif
/* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */
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