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#pragma once
#include "pch.h"
#include "muctx.h"
/* This class interfaces to mupdf API with minimal windows objects
* (other than the file streaming stuff) */
#ifdef _WINRT_DLL
// Attempt to use t.wait()
//#include <ppltasks.h>
//using namespace concurrency;
/* File streaming set up for WinRT */
static int win_next_file(fz_stream *stm, int len)
{
void *temp = stm->state;
win_stream_struct *state = reinterpret_cast <win_stream_struct*> (temp);
IRandomAccessStream^ Stream = state->stream;
unsigned char *buf = state->public_buffer;
unsigned long long curr_pos = Stream->Position;
unsigned long long length = Stream->Size;
DataReader^ local_reader = ref new DataReader(Stream);
if (local_reader == nullptr)
return 0;
// This does not work here. mupdf is not set up to wait for win_next_file
// to complete in an ansyn manner
//auto t = create_task(local_reader->LoadAsync(len));
//t.wait();
DataReaderLoadOperation^ result = local_reader->LoadAsync(len);
while (result->Status != AsyncStatus::Completed) {
}
result->GetResults();
/* First see what is available */
int curr_len2 = local_reader->UnconsumedBufferLength;
if (curr_len2 < len)
len = curr_len2;
/* And make sure that we have enough room */
if (len > sizeof(state->public_buffer))
len = sizeof(state->public_buffer);
Platform::Array<unsigned char>^ arrByte = ref new Platform::Array<unsigned char>(len);
if (arrByte == nullptr)
return 0;
local_reader->ReadBytes(arrByte);
memcpy(buf, arrByte->Data, len);
local_reader->DetachStream();
stm->rp = buf;
stm->wp = buf + len;
stm->pos += len;
if (len == 0)
return EOF;
return *stm->rp++;
}
static void win_seek_file(fz_stream *stm, int offset, int whence)
{
void *temp = stm->state;
win_stream_struct *stream = reinterpret_cast <win_stream_struct*> (temp);
IRandomAccessStream^ Stream = stream->stream;
unsigned long long curr_pos = Stream->Position;
unsigned long long length = Stream->Size;
unsigned long long n;
if (whence == SEEK_END)
{
n = length + offset;
}
else if (whence == SEEK_CUR)
{
n = curr_pos + offset;
}
else if (whence == SEEK_SET)
{
n = offset;
}
Stream->Seek(n);
curr_pos = Stream->Position;
stm->pos = n;
stm->wp = stm->rp;
}
static void win_close_file(fz_context *ctx, void *state)
{
win_stream_struct *win_stream = reinterpret_cast <win_stream_struct*> (state);
IRandomAccessStream^ stream = win_stream->stream;
delete stream;
}
status_t muctx::InitializeStream(IRandomAccessStream^ readStream, char *ext)
{
win_stream.stream = readStream;
fz_stream *mu_stream = fz_new_stream(mu_ctx, 0, win_next_file, win_close_file, NULL);
mu_stream->seek = win_seek_file;
mu_stream->state = reinterpret_cast <void*> (&win_stream);
/* Now lets see if we can open the file */
fz_try(mu_ctx)
{
mu_doc = fz_open_document_with_stream(mu_ctx, ext, mu_stream);
}
fz_always(mu_ctx)
{
fz_close(mu_stream);
}
fz_catch(mu_ctx)
{
return E_FAILURE;
}
return S_ISOK;
}
#endif
/* mutext functions see mupdf readme for details */
static void lock_mutex(void *user, int lock)
{
LPCRITICAL_SECTION locks = (LPCRITICAL_SECTION)user;
EnterCriticalSection(&locks[lock]);
}
static void unlock_mutex(void *user, int lock)
{
LPCRITICAL_SECTION locks = (LPCRITICAL_SECTION)user;
LeaveCriticalSection(&locks[lock]);
}
void muctx::CleanUp(void)
{
fz_free_outline(mu_ctx, mu_outline);
fz_close_document(mu_doc);
page_cache->Empty(mu_ctx);
fz_free_context(mu_ctx);
delete page_cache;
page_cache = NULL;
this->mu_ctx = NULL;
this->mu_doc = NULL;
this->mu_outline = NULL;
}
/* Set up the context, mutex and cookie */
status_t muctx::InitializeContext()
{
int i;
/* Get the mutexes set up */
for (i = 0; i < FZ_LOCK_MAX; i++)
InitializeCriticalSectionEx(&mu_criticalsec[i], 0, 0);
mu_locks.user = &mu_criticalsec[0];
mu_locks.lock = lock_mutex;
mu_locks.unlock = unlock_mutex;
/* Allocate the context */
this->mu_ctx = fz_new_context(NULL, &mu_locks, FZ_STORE_DEFAULT);
if (this->mu_ctx == NULL)
{
return E_OUTOFMEM;
}
else
{
fz_register_document_handlers(this->mu_ctx);
return S_ISOK;
}
}
/* Initializer */
muctx::muctx(void)
{
mu_ctx = NULL;
mu_doc = NULL;
mu_outline = NULL;
page_cache = new Cache();
}
/* Destructor */
muctx::~muctx(void)
{
fz_free_outline(mu_ctx, mu_outline);
fz_close_document(mu_doc);
page_cache->Empty(mu_ctx);
fz_free_context(mu_ctx);
mu_ctx = NULL;
mu_doc = NULL;
mu_outline = NULL;
delete page_cache;
page_cache = NULL;
}
/* Return the documents page count */
int muctx::GetPageCount()
{
if (this->mu_doc == NULL)
return -1;
else
return this->mu_doc->count_pages(this->mu_doc);
}
/* Get page size */
int muctx::MeasurePage(int page_num, point_t *size)
{
fz_rect rect;
fz_page *page;
fz_rect *bounds;
fz_try(mu_ctx)
{
page = fz_load_page(mu_doc, page_num);
bounds = fz_bound_page(mu_doc, page, &rect);
size->X = bounds->x1 - bounds->x0;
size->Y = bounds->y1 - bounds->y0;
}
fz_catch(mu_ctx)
{
return E_FAIL;
}
return 0;
}
/* Get page size */
point_t muctx::MeasurePage(fz_page *page)
{
point_t pageSize;
fz_rect rect;
fz_rect *bounds;
bounds = fz_bound_page(mu_doc, page, &rect);
pageSize.X = bounds->x1 - bounds->x0;
pageSize.Y = bounds->y1 - bounds->y0;
return pageSize;
}
void muctx::FlattenOutline(fz_outline *outline, int level,
sh_vector_content contents_vec)
{
char indent[8*4+1];
if (level > 8)
level = 8;
memset(indent, ' ', level * 4);
indent[level * 4] = 0;
std::string indent_str = indent;
std::string str_indent;
while (outline)
{
if (outline->dest.kind == FZ_LINK_GOTO)
{
int page = outline->dest.ld.gotor.page;
if (page >= 0 && outline->title)
{
/* Add to the contents std:vec */
sh_content content_item(new content_t());
content_item->page = page;
content_item->string_orig = outline->title;
str_indent = content_item->string_orig;
str_indent.insert(0, indent_str);
content_item->string_margin = str_indent;
contents_vec->push_back(content_item);
}
}
FlattenOutline(outline->down, level + 1, contents_vec);
outline = outline->next;
}
}
int muctx::GetContents(sh_vector_content contents_vec)
{
fz_outline *root = NULL;
int has_content = 0;
fz_var(root);
fz_try(mu_ctx)
{
root = fz_load_outline(mu_doc);
if (root != NULL)
{
has_content = 1;
FlattenOutline(root, 0, contents_vec);
}
}
fz_always(mu_ctx)
{
fz_free_outline(mu_ctx, root);
}
fz_catch(mu_ctx)
{
return E_FAIL;
}
return has_content;
}
int muctx::GetTextSearch(int page_num, char* needle, sh_vector_text texts_vec)
{
fz_page *page = NULL;
fz_text_sheet *sheet = NULL;
fz_device *dev = NULL;
fz_text_page *text = NULL;
int hit_count = 0;
int k;
fz_var(page);
fz_var(sheet);
fz_var(dev);
fz_try(mu_ctx)
{
page = fz_load_page(mu_doc, page_num);
sheet = fz_new_text_sheet(mu_ctx);
text = fz_new_text_page(mu_ctx);
dev = fz_new_text_device(mu_ctx, sheet, text);
fz_run_page(mu_doc, page, dev, &fz_identity, NULL);
fz_free_device(dev); /* Why does this need to be done here? Seems odd */
dev = NULL;
hit_count = fz_search_text_page(mu_ctx, text, needle, mu_hit_bbox, nelem(mu_hit_bbox));
for (k = 0; k < hit_count; k++)
{
sh_text text_search(new text_search_t());
text_search->upper_left.X = mu_hit_bbox[k].x0;
text_search->upper_left.Y = mu_hit_bbox[k].y0;
text_search->lower_right.X = mu_hit_bbox[k].x1;
text_search->lower_right.Y = mu_hit_bbox[k].y1;
texts_vec->push_back(text_search);
}
}
fz_always(mu_ctx)
{
fz_free_page(mu_doc, page);
fz_free_device(dev);
fz_free_text_sheet(mu_ctx, sheet);
fz_free_text_page(mu_ctx, text);
}
fz_catch(mu_ctx)
{
return E_FAIL;
}
return hit_count;
}
/* Get the links and pack into a smart pointer structure */
unsigned int muctx::GetLinks(int page_num, sh_vector_link links_vec)
{
fz_page *page = NULL;
fz_link *links = NULL;
int k = 0;
unsigned int num_links = 0;
fz_var(page);
fz_var(links);
fz_try(mu_ctx)
{
page = fz_load_page(mu_doc, page_num);
links = fz_load_links(mu_doc, page);
fz_link *curr_link = links;
if (curr_link != NULL)
{
/* Get our smart pointer structure filled */
while (curr_link != NULL)
{
fz_rect curr_rect = curr_link->rect;
sh_link link(new document_link_t());
link->upper_left.X = curr_rect.x0;
link->upper_left.Y = curr_rect.y0;
link->lower_right.X = curr_rect.x1;
link->lower_right.Y = curr_rect.y1;
switch (curr_link->dest.kind)
{
case FZ_LINK_GOTO:
link->type = LINK_GOTO;
link->page_num = curr_link->dest.ld.gotor.page;
break;
case FZ_LINK_URI:
{
int lenstr = strlen(curr_link->dest.ld.uri.uri);
std::unique_ptr<char[]> uri(new char[lenstr + 1]);
strcpy_s(uri.get(), lenstr + 1, curr_link->dest.ld.uri.uri);
link->uri.swap(uri);
link->type = LINK_URI;
break;
}
default:
link->type = NOT_SET;
}
links_vec->push_back(link);
curr_link = curr_link->next;
num_links += 1;
}
}
}
fz_always(mu_ctx)
{
fz_free_page(mu_doc, page);
fz_drop_link(mu_ctx, links);
}
fz_catch(mu_ctx)
{
return E_FAIL;
}
return num_links;
}
fz_display_list * muctx::CreateDisplayList(int page_num, int *width, int *height)
{
fz_device *dev = NULL;
fz_page *page = NULL;
point_t page_size;
/* First see if we have this one in the cache */
fz_display_list *dlist = page_cache->Use(page_num, width, height, mu_ctx);
if (dlist != NULL)
return dlist;
/* Apparently not, lets go ahead and create and add to cache */
fz_var(dev);
fz_var(page);
fz_var(dlist);
fz_try(mu_ctx)
{
page = fz_load_page(mu_doc, page_num);
/* Create a new list */
dlist = fz_new_display_list(mu_ctx);
dev = fz_new_list_device(mu_ctx, dlist);
fz_run_page_contents(mu_doc, page, dev, &fz_identity, NULL);
page_size = MeasurePage(page);
*width = page_size.X;
*height = page_size.Y;
/* Add it to the cache and set that it is in use */
page_cache->Add(page_num, *width, *height, dlist, mu_ctx);
}
fz_always(mu_ctx)
{
fz_free_device(dev);
fz_free_page(mu_doc, page);
}
fz_catch(mu_ctx)
{
fz_drop_display_list(mu_ctx, dlist);
return NULL;
}
return dlist;
}
/* Render display list bmp_data buffer. No lock needed for this operation */
status_t muctx::RenderPageMT(void *dlist, int page_width, int page_height,
unsigned char *bmp_data, int bmp_width, int bmp_height,
float scale, bool flipy, bool tile, point_t top_left,
point_t bottom_right)
{
fz_device *dev = NULL;
fz_pixmap *pix = NULL;
fz_matrix ctm, *pctm = &ctm;
fz_context *ctx_clone = NULL;
fz_display_list *display_list = (fz_display_list*) dlist;
ctx_clone = fz_clone_context(mu_ctx);
fz_var(dev);
fz_var(pix);
fz_var(display_list);
fz_try(ctx_clone)
{
pctm = fz_scale(pctm, scale, scale);
/* Flip on Y. */
if (flipy)
{
ctm.f = (float) page_height * ctm.d;
ctm.d = -ctm.d;
ctm.f += top_left.Y;
}
else
{
ctm.f -= top_left.Y;
}
ctm.e -= top_left.X;
pix = fz_new_pixmap_with_data(ctx_clone, fz_device_bgr(ctx_clone),
bmp_width, bmp_height, bmp_data);
fz_clear_pixmap_with_value(ctx_clone, pix, 255);
dev = fz_new_draw_device(ctx_clone, pix);
fz_run_display_list(display_list, dev, pctm, NULL, NULL);
}
fz_always(ctx_clone)
{
fz_free_device(dev);
fz_drop_pixmap(ctx_clone, pix);
fz_drop_display_list(ctx_clone, display_list);
}
fz_catch(ctx_clone)
{
fz_free_context(ctx_clone);
return E_FAILURE;
}
fz_free_context(ctx_clone);
return S_ISOK;
}
/* Render page_num to size width by height into bmp_data buffer. Lock needed. */
status_t muctx::RenderPage(int page_num, unsigned char *bmp_data, int bmp_width,
int bmp_height, float scale, bool flipy)
{
fz_device *dev = NULL;
fz_pixmap *pix = NULL;
fz_page *page = NULL;
fz_matrix ctm, *pctm = &ctm;
point_t page_size;
fz_var(dev);
fz_var(pix);
fz_var(page);
fz_try(mu_ctx)
{
page = fz_load_page(mu_doc, page_num);
page_size = MeasurePage(page);
pctm = fz_scale(pctm, scale, scale);
/* Flip on Y */
if (flipy)
{
ctm.f = bmp_height;
ctm.d = -ctm.d;
}
pix = fz_new_pixmap_with_data(mu_ctx, fz_device_bgr(mu_ctx), bmp_width,
bmp_height, bmp_data);
fz_clear_pixmap_with_value(mu_ctx, pix, 255);
dev = fz_new_draw_device(mu_ctx, pix);
fz_run_page(mu_doc, page, dev, pctm, NULL);
}
fz_always(mu_ctx)
{
fz_free_device(dev);
fz_drop_pixmap(mu_ctx, pix);
fz_free_page(mu_doc, page);
}
fz_catch(mu_ctx)
{
return E_FAILURE;
}
return S_ISOK;
}
bool muctx::RequiresPassword(void)
{
return fz_needs_password(mu_doc) != 0;
}
bool muctx::ApplyPassword(char* password)
{
return fz_authenticate_password(mu_doc, password) != 0;
}
std::string muctx::GetHTML(int page_num)
{
fz_output *out = NULL;
fz_device *dev = NULL;
fz_page *page = NULL;
fz_text_sheet *sheet = NULL;
fz_text_page *text = NULL;
fz_buffer *buf = NULL;
std::string html;
fz_var(dev);
fz_var(page);
fz_var(sheet);
fz_var(text);
fz_var(buf);
fz_try(mu_ctx)
{
page = fz_load_page(mu_doc, page_num);
sheet = fz_new_text_sheet(mu_ctx);
text = fz_new_text_page(mu_ctx);
dev = fz_new_text_device(mu_ctx, sheet, text);
fz_run_page(mu_doc, page, dev, &fz_identity, NULL);
fz_free_device(dev);
dev = NULL;
fz_analyze_text(mu_ctx, sheet, text);
buf = fz_new_buffer(mu_ctx, 256);
out = fz_new_output_with_buffer(mu_ctx, buf);
fz_print_text_page_html(mu_ctx, out, text);
html = std::string(((char*) buf->data));
}
fz_always(mu_ctx)
{
fz_free_device(dev);
fz_free_page(mu_doc, page);
fz_free_text_sheet(mu_ctx, sheet);
fz_free_text_page(mu_ctx, text);
fz_drop_buffer(mu_ctx, buf);
}
fz_catch(mu_ctx)
{
return nullptr;
}
return html;
}
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