static void writepixmap(fz_context *ctx, fz_pixmap *pix, char *file, int rgb)
{
char buf[1024];
fz_pixmap *converted = NULL;
if (!pix)
return;
if (rgb && pix->colorspace && pix->colorspace != fz_device_rgb(ctx))
{
fz_irect bbox;
converted = fz_new_pixmap_with_bbox(ctx, fz_device_rgb(ctx), fz_pixmap_bbox(ctx, pix, &bbox), pix->alpha);
fz_convert_pixmap(ctx, converted, pix);
pix = converted;
}
if (pix->n <= 4)
{
snprintf(buf, sizeof(buf), "%s.png", file);
printf("extracting image %s\n", buf);
fz_save_pixmap_as_png(ctx, pix, buf);
}
else
{
snprintf(buf, sizeof(buf), "%s.pam", file);
printf("extracting image %s\n", buf);
fz_save_pixmap_as_pam(ctx, pix, buf);
}
fz_drop_pixmap(ctx, converted);
}
int main(int argc, char **argv)
{
char *filename = argc >= 2 ? argv[1] : "";
pthread_t *thread = NULL;
fz_locks_context locks;
pthread_mutex_t mutex[FZ_LOCK_MAX];
fz_context *ctx;
fz_document *doc;
int threads;
int i;
// Initialize FZ_LOCK_MAX number of non-recursive mutexes.
for (i = 0; i < FZ_LOCK_MAX; i++)
{
if (pthread_mutex_init(&mutex[i], NULL) != 0)
fail("pthread_mutex_init()");
}
// Initialize the locking structure with function pointers to
// the locking functions and to the user data. In this case
// the user data is a pointer to the array of mutexes so the
// locking functions can find the relevant lock to change when
// they are called. This way we avoid global variables.
locks.user = mutex;
locks.lock = lock_mutex;
locks.unlock = unlock_mutex;
// This is the main threads context function, so supply the
// locking structure. This context will be used to parse all
// the pages from the document.
ctx = fz_new_context(NULL, &locks, FZ_STORE_UNLIMITED);
// Register default file types.
fz_register_document_handlers(ctx);
// Open the PDF, XPS or CBZ document. Note, this binds doc to ctx.
// You must only ever use doc with ctx - never a clone of it!
doc = fz_open_document(ctx, filename);
// Retrieve the number of pages, which translates to the
// number of threads used for rendering pages.
threads = fz_count_pages(ctx, doc);
fprintf(stderr, "spawning %d threads, one per page...\n", threads);
thread = malloc(threads * sizeof (pthread_t));
for (i = 0; i < threads; i++)
{
fz_page *page;
fz_rect bbox;
fz_irect rbox;
fz_display_list *list;
fz_device *dev;
fz_pixmap *pix;
struct data *data;
// Load the relevant page for each thread. Note, that this
// cannot be done on the worker threads, as each use of doc
// uses ctx, and only one thread can be using ctx at a time.
page = fz_load_page(ctx, doc, i);
// Compute the bounding box for each page.
fz_bound_page(ctx, page, &bbox);
// Create a display list that will hold the drawing
// commands for the page. Once we have the display list
// this can safely be used on any other thread as it is
// not bound to a given context.
list = fz_new_display_list(ctx, &bbox);
// Run the loaded page through a display list device
// to populate the page's display list.
dev = fz_new_list_device(ctx, list);
fz_run_page(ctx, page, dev, &fz_identity, NULL);
fz_close_device(ctx, dev);
fz_drop_device(ctx, dev);
// The page is no longer needed, all drawing commands
// are now in the display list.
fz_drop_page(ctx, page);
// Create a white pixmap using the correct dimensions.
pix = fz_new_pixmap_with_bbox(ctx, fz_device_rgb(ctx), fz_round_rect(&rbox, &bbox), 0);
fz_clear_pixmap_with_value(ctx, pix, 0xff);
// Populate the data structure to be sent to the
// rendering thread for this page.
data = malloc(sizeof (struct data));
data->pagenumber = i + 1;
data->ctx = ctx;
data->list = list;
data->bbox = bbox;
data->pix = pix;
// Create the thread and pass it the data structure.
if (pthread_create(&thread[i], NULL, renderer, data) != 0)
fail("pthread_create()");
}
// Now each thread is rendering pages, so wait for each thread
// to complete its rendering.
fprintf(stderr, "joining %d threads...\n", threads);
for (i = threads - 1; i >= 0; i--)
{
char filename[42];
struct data *data;
if (pthread_join(thread[i], (void **) &data) != 0)
fail("pthread_join");
sprintf(filename, "out%04d.png", i);
fprintf(stderr, "\tSaving %s...\n", filename);
// Write the rendered image to a PNG file
fz_save_pixmap_as_png(ctx, data->pix, filename);
// Free the thread's pixmap and display list since
// they were allocated by the main thread above.
fz_drop_pixmap(ctx, data->pix);
fz_drop_display_list(ctx, data->list);
// Free the data structured passed back and forth
// between the main thread and rendering thread.
free(data);
}
fprintf(stderr, "finally!\n");
fflush(NULL);
free(thread);
// Finally the document is closed and the main thread's
// context is freed.
fz_drop_document(ctx, doc);
fz_drop_context(ctx);
return 0;
}
int
main(int argc, char *argv[])
{
fz_context *ctx;
FILE *script = NULL;
int c;
while ((c = fz_getopt(argc, argv, "o:p:v")) != -1)
{
switch(c)
{
case 'o': output = fz_optarg; break;
case 'p': prefix = fz_optarg; break;
case 'v': verbosity ^= 1; break;
default: usage(); break;
}
}
if (fz_optind == argc)
usage();
ctx = fz_new_context(NULL, NULL, FZ_STORE_DEFAULT);
if (!ctx)
{
fprintf(stderr, "cannot initialise context\n");
exit(1);
}
pdfapp_init(ctx, &gapp);
gapp.scrw = 640;
gapp.scrh = 480;
gapp.colorspace = fz_device_rgb(ctx);
fz_try(ctx)
{
while (fz_optind < argc)
{
scriptname = argv[fz_optind++];
script = fopen(scriptname, "rb");
if (script == NULL)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot open script: %s", scriptname);
do
{
char *line = my_getline(script);
if (line == NULL)
continue;
if (verbosity)
fprintf(stderr, "'%s'\n", line);
if (match(&line, "%"))
{
/* Comment */
}
else if (match(&line, "PASSWORD"))
{
strcpy(pd_password, line);
}
else if (match(&line, "OPEN"))
{
char path[LONGLINE];
if (file_open)
pdfapp_close(&gapp);
if (prefix)
{
sprintf(path, "%s%s", prefix, line);
}
else
{
strcpy(path, line);
}
pdfapp_open(&gapp, path, 0);
file_open = 1;
}
else if (match(&line, "GOTO"))
{
pdfapp_gotopage(&gapp, atoi(line)-1);
}
else if (match(&line, "SCREENSHOT"))
{
char text[1024];
sprintf(text, output, ++shotcount);
if (strstr(text, ".pgm") || strstr(text, ".ppm") || strstr(text, ".pnm"))
fz_save_pixmap_as_pnm(ctx, gapp.image, text);
else
fz_save_pixmap_as_png(ctx, gapp.image, text);
}
else if (match(&line, "RESIZE"))
{
int w, h;
sscanf(line, "%d %d", &w, &h);
pdfapp_onresize(&gapp, w, h);
}
else if (match(&line, "CLICK"))
{
float x, y, b;
int n;
n = sscanf(line, "%f %f %f", &x, &y, &b);
if (n < 1)
x = 0.0f;
if (n < 2)
y = 0.0f;
if (n < 3)
b = 1;
/* state = 1 = transition down */
pdfapp_onmouse(&gapp, (int)x, (int)y, b, 0, 1);
/* state = -1 = transition up */
pdfapp_onmouse(&gapp, (int)x, (int)y, b, 0, -1);
}
else if (match(&line, "TEXT"))
{
unescape_string(td_textinput, line);
}
else
{
fprintf(stderr, "Ignoring line without script statement.\n");
}
}
while (!feof(script));
fclose(script);
}
}
fz_catch(ctx)
{
fprintf(stderr, "error: cannot execute '%s'\n", scriptname);
}
if (file_open)
pdfapp_close(&gapp);
fz_drop_context(ctx);
return 0;
}