zathura_error_t
djvu_page_render_cairo(zathura_page_t* page, void* UNUSED(data), cairo_t* cairo,
bool GIRARA_UNUSED(printing))
{
if (page == NULL || cairo == NULL) {
return ZATHURA_ERROR_INVALID_ARGUMENTS;
}
zathura_document_t* document = zathura_page_get_document(page);
if (document == NULL) {
return ZATHURA_ERROR_UNKNOWN;
}
/* init ddjvu render data */
djvu_document_t* djvu_document = zathura_document_get_data(document);
ddjvu_page_t* djvu_page = ddjvu_page_create_by_pageno(djvu_document->document, zathura_page_get_index(page));
if (djvu_page == NULL) {
return ZATHURA_ERROR_UNKNOWN;
}
while (!ddjvu_page_decoding_done(djvu_page)) {
handle_messages(djvu_document, true);
}
cairo_surface_t* surface = cairo_get_target(cairo);
if (surface == NULL ||
cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS ||
cairo_surface_get_type(surface) != CAIRO_SURFACE_TYPE_IMAGE) {
ddjvu_page_release(djvu_page);
return ZATHURA_ERROR_UNKNOWN;
}
unsigned int page_width = cairo_image_surface_get_width(surface);
unsigned int page_height = cairo_image_surface_get_height(surface);;
ddjvu_rect_t rrect = { 0, 0, page_width, page_height };
ddjvu_rect_t prect = { 0, 0, page_width, page_height };
char* surface_data = (char*) cairo_image_surface_get_data(surface);
if (surface_data == NULL) {
ddjvu_page_release(djvu_page);
return ZATHURA_ERROR_UNKNOWN;
}
/* render page */
ddjvu_page_render(djvu_page, DDJVU_RENDER_COLOR, &prect, &rrect,
djvu_document->format, cairo_image_surface_get_stride(surface), surface_data);
ddjvu_page_release(djvu_page);
return ZATHURA_ERROR_OK;
}
extern "C" void
Java_org_vudroid_djvudroid_codec_DjvuPage_free(JNIEnv *env,
jclass cls,
jlong pageHangle)
{
ddjvu_page_release((ddjvu_page_t*)pageHangle);
}
static int getPageInfo(lua_State *L) {
DjvuDocument *doc = (DjvuDocument*) luaL_checkudata(L, 1, "djvudocument");
int pageno = luaL_checkint(L, 2);
ddjvu_page_t *djvu_page;
int page_width, page_height, page_dpi;
double page_gamma;
ddjvu_page_type_t page_type;
char *page_type_str;
djvu_page = ddjvu_page_create_by_pageno(doc->doc_ref, pageno - 1);
if (! djvu_page)
return luaL_error(L, "cannot create djvu_page #%d", pageno);
while (! ddjvu_page_decoding_done(djvu_page))
handle(L, doc->context, TRUE);
page_width = ddjvu_page_get_width(djvu_page);
lua_pushnumber(L, page_width);
page_height = ddjvu_page_get_height(djvu_page);
lua_pushnumber(L, page_height);
page_dpi = ddjvu_page_get_resolution(djvu_page);
lua_pushnumber(L, page_dpi);
page_gamma = ddjvu_page_get_gamma(djvu_page);
lua_pushnumber(L, page_gamma);
page_type = ddjvu_page_get_type(djvu_page);
switch (page_type) {
case DDJVU_PAGETYPE_UNKNOWN:
page_type_str = "UNKNOWN";
break;
case DDJVU_PAGETYPE_BITONAL:
page_type_str = "BITONAL";
break;
case DDJVU_PAGETYPE_PHOTO:
page_type_str = "PHOTO";
break;
case DDJVU_PAGETYPE_COMPOUND:
page_type_str = "COMPOUND";
break;
default:
page_type_str = "INVALID";
break;
}
lua_pushstring(L, page_type_str);
ddjvu_page_release(djvu_page);
return 5;
}
JNIEXPORT void JNICALL
Java_universe_constellation_orion_viewer_djvu_DjvuDocument_gotoPageInternal(JNIEnv *env, jobject thiz, int pageNum)
{
LOGI("Opening page: %d", pageNum);
if (page != NULL) {
ddjvu_page_release(page);
page = NULL;
}
page = ddjvu_page_create_by_pageno(doc, pageNum);
}
static int closePage(lua_State *L) {
DjvuPage *page = (DjvuPage*) luaL_checkudata(L, 1, "djvupage");
// should be safe if called twice
if (page->page_ref != NULL) {
ddjvu_page_release(page->page_ref);
page->page_ref = NULL;
}
return 0;
}
JNIEXPORT void JNICALL
Java_universe_constellation_orion_viewer_djvu_DjvuDocument_destroying(JNIEnv * env, jobject thiz)
{
LOGI("Closing doc...");
if (page != NULL) {
ddjvu_page_release(page);
page = NULL;
}
if (doc != NULL) {
ddjvu_document_release(doc);
doc = NULL;
}
if (context != NULL) {
ddjvu_context_release(context);
context = context;
}
}
QImage Model::DjVuPage::render(qreal horizontalResolution, qreal verticalResolution, Rotation rotation, const QRect& boundingRect) const
{
QMutexLocker mutexLocker(&m_parent->m_mutex);
ddjvu_status_t status;
ddjvu_page_t* page = ddjvu_page_create_by_pageno(m_parent->m_document, m_index);
if(page == 0)
{
return QImage();
}
while(true)
{
status = ddjvu_page_decoding_status(page);
if(status < DDJVU_JOB_OK)
{
clearMessageQueue(m_parent->m_context, true);
}
else
{
break;
}
}
if(status >= DDJVU_JOB_FAILED)
{
ddjvu_page_release(page);
return QImage();
}
switch(rotation)
{
default:
case RotateBy0:
ddjvu_page_set_rotation(page, DDJVU_ROTATE_0);
break;
case RotateBy90:
ddjvu_page_set_rotation(page, DDJVU_ROTATE_270);
break;
case RotateBy180:
ddjvu_page_set_rotation(page, DDJVU_ROTATE_180);
break;
case RotateBy270:
ddjvu_page_set_rotation(page, DDJVU_ROTATE_90);
break;
}
ddjvu_rect_t pagerect;
pagerect.x = 0;
pagerect.y = 0;
switch(rotation)
{
default:
case RotateBy0:
case RotateBy180:
pagerect.w = qRound(horizontalResolution / m_resolution * m_size.width());
pagerect.h = qRound(verticalResolution / m_resolution * m_size.height());
break;
case RotateBy90:
case RotateBy270:
pagerect.w = qRound(horizontalResolution / m_resolution * m_size.height());
pagerect.h = qRound(verticalResolution / m_resolution * m_size.width());
break;
}
ddjvu_rect_t renderrect;
if(boundingRect.isNull())
{
renderrect.x = pagerect.x;
renderrect.y = pagerect.y;
renderrect.w = pagerect.w;
renderrect.h = pagerect.h;
}
else
{
renderrect.x = boundingRect.x();
renderrect.y = boundingRect.y();
renderrect.w = boundingRect.width();
renderrect.h = boundingRect.height();
}
QImage image(renderrect.w, renderrect.h, QImage::Format_RGB32);
if(!ddjvu_page_render(page, DDJVU_RENDER_COLOR, &pagerect, &renderrect, m_parent->m_format, image.bytesPerLine(), reinterpret_cast< char* >(image.bits())))
{
image = QImage();
}
clearMessageQueue(m_parent->m_context, false);
ddjvu_page_release(page);
return image;
}
gint32
load_djvu (const gchar * filename,
GimpRunMode runmode,
gboolean preview)
{
GimpPixelRgn rgn_in;
GimpDrawable *drawable;
gint32 volatile image_ID;
gint32 layer_ID;
int x1, y1, x2, y2, width, height;
unsigned char *src = NULL;
int file_length;
ctx = ddjvu_context_create("gimp");
//
doc = ddjvu_document_create_by_filename(ctx,filename, TRUE);
while (! ddjvu_document_decoding_done(doc))
handle(TRUE);
i = ddjvu_document_get_pagenum(doc);
dialog( &pageno ,i);
//processing the page
page = ddjvu_page_create_by_pageno(doc, pageno-1);
while (! ddjvu_page_decoding_done(page))
handle(TRUE);
if (ddjvu_page_decoding_error(page))
{
fprintf(stderr,"unexpected error ");
exit(10);
}
// ddjvu variables
ddjvu_rect_t prect;
ddjvu_rect_t rrect;
ddjvu_format_style_t style;
ddjvu_render_mode_t mode;
ddjvu_format_t *fmt;
int iw = ddjvu_page_get_width(page);
int ih = ddjvu_page_get_height(page);
int dpi = ddjvu_page_get_resolution(page);
ddjvu_page_type_t type = ddjvu_page_get_type(page);
char *image = 0;
int rowsize;
//end of ddjvu variables
style= DDJVU_FORMAT_RGB24;
mode=DDJVU_RENDER_COLOR;
fmt = ddjvu_format_create(style, 0, 0);
ddjvu_format_set_row_order(fmt, 1);
prect.w = iw;
prect.h = ih;
prect.x = 0;
prect.y = 0;
flag_scale=150;
prect.w = (unsigned int) (iw * flag_scale) / dpi;
prect.h = (unsigned int) (ih * flag_scale) / dpi;
rrect = prect;
rowsize = (rrect.w *3);
image = (char*)malloc(rowsize * rrect.h);
//generating page
ddjvu_page_render(page, mode, &prect, &rrect, fmt, rowsize, image);
ddjvu_page_release(page);
char *s =image;
/* create output image */
width = prect.w;
height = prect.h;
x1 = 0;
y1 = 0;
x2 = prect.w;
y2 = prect.h;
image_ID = gimp_image_new (width, height, GIMP_RGB);
layer_ID = gimp_layer_new (image_ID, _("Background"),
width, height, GIMP_RGB, 100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image_ID, layer_ID, 0);
drawable = gimp_drawable_get (layer_ID); // initializes the drawable
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
gimp_pixel_rgn_init (&rgn_in, drawable, x1, y1,
x2 - x1, y2 - y1, TRUE, TRUE);
gimp_pixel_rgn_set_rect (&rgn_in, image, 0, 0, width, height);
//g_free (buf);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, x2 - x1, y2 - y1);
gimp_image_set_filename (image_ID, filename);
return image_ID;
image =NULL;
//not handling any error
if (doc)
ddjvu_document_release(doc);
if (ctx)
ddjvu_context_release(ctx);
}
/*
** Returns 0 for success, negative number for error code.
** bpp can be 24 or 8.
**
*/
int bmpdjvu_djvufile_to_bmp(WILLUSBITMAP *bmp,char *infile,int pageno,
int dpi,int bpp,FILE *out)
{
ddjvu_context_t *ctx;
ddjvu_document_t *doc;
ddjvu_page_t *page;
/* ddjvu_page_type_t type; */
ddjvu_rect_t prect;
ddjvu_rect_t rrect;
ddjvu_format_style_t style;
ddjvu_render_mode_t mode;
ddjvu_format_t *fmt;
int i,iw,ih,idpi,status;
ctx=ddjvu_context_create("bmpdjvu_djvufile_to_bmp");
if (ctx==NULL)
{
nprintf(out,"Cannot create djvu context.\n");
return(-1);
}
doc=ddjvu_document_create_by_filename(ctx,infile,1);
if (doc==NULL)
{
ddjvu_context_release(ctx);
nprintf(out,"Cannot create djvu document context from djvu file %s.\n",
infile);
return(-2);
}
i=ddjvu_document_get_pagenum(doc);
if (pageno<0 || pageno>i)
{
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Page number %d is out of range for djvu file %s.\n",pageno,infile);
return(-3);
}
page=ddjvu_page_create_by_pageno(doc,pageno-1);
if (page==NULL)
{
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Cannot parse page %d of djvu file %s.\n",pageno,infile);
return(-4);
}
while (!ddjvu_page_decoding_done(page))
handle(1,ctx);
if (ddjvu_page_decoding_error(page))
{
ddjvu_page_release(page);
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Error decoding page %d of djvu file %s.\n",pageno,infile);
return(-5);
}
/* type= */ ddjvu_page_get_type(page);
/*
printf("type=%d\n",type);
description=ddjvu_page_get_long_description(page);
printf("Description='%s'\n",description);
*/
iw = ddjvu_page_get_width(page);
ih = ddjvu_page_get_height(page);
idpi = ddjvu_page_get_resolution(page);
prect.x=prect.y=0;
bmp->width=prect.w=iw*dpi/idpi;
bmp->height=prect.h=ih*dpi/idpi;
bmp->bpp=(bpp==8) ? 8 : 24;
rrect=prect;
bmp_alloc(bmp);
if (bmp->bpp==8)
{
int ii;
for (ii=0;ii<256;ii++)
bmp->red[ii]=bmp->blue[ii]=bmp->green[ii]=ii;
}
mode=DDJVU_RENDER_COLOR;
style=bpp==8 ? DDJVU_FORMAT_GREY8 : DDJVU_FORMAT_RGB24;
fmt=ddjvu_format_create(style,0,0);
if (fmt==NULL)
{
ddjvu_page_release(page);
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
nprintf(out,"Error setting DJVU format for djvu file %s (page %d).\n",infile,pageno);
return(-6);
}
ddjvu_format_set_row_order(fmt,1);
status=ddjvu_page_render(page,mode,&prect,&rrect,fmt,bmp_bytewidth(bmp),(char *)bmp->data);
ddjvu_format_release(fmt);
ddjvu_page_release(page);
ddjvu_document_release(doc);
ddjvu_context_release(ctx);
if (!status)
{
nprintf(out,"Error rendering page %d of djvu file %s.\n",pageno,infile);
return(-7);
}
return(0);
}
zathura_image_buffer_t*
djvu_page_render(zathura_page_t* page, void* UNUSED(data), zathura_error_t* error)
{
if (page == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_INVALID_ARGUMENTS;
}
return NULL;
}
zathura_document_t* document = zathura_page_get_document(page);
if (document == NULL) {
return NULL;
}
/* calculate sizes */
unsigned int page_width = zathura_document_get_scale(document) * zathura_page_get_width(page);
unsigned int page_height = zathura_document_get_scale(document) * zathura_page_get_height(page);
if (page_width == 0 || page_height == 0) {
if (error != NULL) {
*error = ZATHURA_ERROR_UNKNOWN;
}
goto error_out;
}
/* init ddjvu render data */
djvu_document_t* djvu_document = zathura_document_get_data(document);
ddjvu_page_t* djvu_page = ddjvu_page_create_by_pageno(
djvu_document->document, zathura_page_get_index(page));
if (djvu_page == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_UNKNOWN;
}
goto error_out;
}
while (!ddjvu_page_decoding_done(djvu_page)) {
handle_messages(djvu_document, true);
}
ddjvu_rect_t rrect = { 0, 0, page_width, page_height };
ddjvu_rect_t prect = { 0, 0, page_width, page_height };
zathura_image_buffer_t* image_buffer =
zathura_image_buffer_create(page_width, page_height);
if (image_buffer == NULL) {
if (error != NULL) {
*error = ZATHURA_ERROR_OUT_OF_MEMORY;
}
goto error_free;
}
/* set rotation */
ddjvu_page_set_rotation(djvu_page, DDJVU_ROTATE_0);
/* render page */
ddjvu_page_render(djvu_page, DDJVU_RENDER_COLOR, &prect, &rrect,
djvu_document->format, 3 * page_width, (char*) image_buffer->data);
return image_buffer;
error_free:
ddjvu_page_release(djvu_page);
zathura_image_buffer_free(image_buffer);
error_out:
return NULL;
}