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#include "mupdf/fitz.h"
#define DPI 72.0f
typedef struct img_document_s img_document;
typedef struct img_page_s img_page;
struct img_page_s
{
fz_page super;
fz_image *image;
};
struct img_document_s
{
fz_document super;
fz_image *image;
};
static void
img_close_document(fz_context *ctx, img_document *doc)
{
fz_drop_image(ctx, doc->image);
fz_free(ctx, doc);
}
static int
img_count_pages(fz_context *ctx, img_document *doc)
{
return 1;
}
static fz_rect *
img_bound_page(fz_context *ctx, img_page *page, fz_rect *bbox)
{
fz_image *image = page->image;
int xres, yres;
fz_image_resolution(image, &xres, &yres);
bbox->x0 = bbox->y0 = 0;
bbox->x1 = image->w * DPI / xres;
bbox->y1 = image->h * DPI / yres;
return bbox;
}
static void
img_run_page(fz_context *ctx, img_page *page, fz_device *dev, const fz_matrix *ctm, fz_cookie *cookie)
{
fz_matrix local_ctm = *ctm;
fz_image *image = page->image;
int xres, yres;
float w, h;
fz_image_resolution(image, &xres, &yres);
w = image->w * DPI / xres;
h = image->h * DPI / yres;
fz_pre_scale(&local_ctm, w, h);
fz_fill_image(ctx, dev, image, &local_ctm, 1);
}
static void
img_drop_page_imp(fz_context *ctx, img_page *page)
{
fz_drop_image(ctx, page->image);
}
static img_page *
img_load_page(fz_context *ctx, img_document *doc, int number)
{
img_page *page;
if (number != 0)
return NULL;
page = fz_new_page(ctx, sizeof *page);
page->super.bound_page = (fz_page_bound_page_fn *)img_bound_page;
page->super.run_page_contents = (fz_page_run_page_contents_fn *)img_run_page;
page->super.drop_page_imp = (fz_page_drop_page_imp_fn *)img_drop_page_imp;
page->image = fz_keep_image(ctx, doc->image);
return page;
}
static int
img_lookup_metadata(fz_context *ctx, img_document *doc, const char *key, char *buf, int size)
{
if (!strcmp(key, "format"))
return fz_strlcpy(buf, "Image", size);
return -1;
}
static img_document *
img_new_document(fz_context *ctx, fz_image *image)
{
img_document *doc = fz_new_document(ctx, img_document);
doc->super.close = (fz_document_close_fn *)img_close_document;
doc->super.count_pages = (fz_document_count_pages_fn *)img_count_pages;
doc->super.load_page = (fz_document_load_page_fn *)img_load_page;
doc->super.lookup_metadata = (fz_document_lookup_metadata_fn *)img_lookup_metadata;
doc->image = fz_keep_image(ctx, image);
return doc;
}
static img_document *
img_open_document_with_stream(fz_context *ctx, fz_stream *stm)
{
fz_buffer *buffer = NULL;
fz_image *image = NULL;
img_document *doc;
fz_var(buffer);
fz_var(image);
fz_try(ctx)
{
buffer = fz_read_all(ctx, stm, 1024);
image = fz_new_image_from_buffer(ctx, buffer);
doc = img_new_document(ctx, image);
}
fz_always(ctx)
{
fz_drop_image(ctx, image);
fz_drop_buffer(ctx, buffer);
}
fz_catch(ctx)
fz_rethrow(ctx);
return doc;
}
static img_document *
img_open_document(fz_context *ctx, const char *filename)
{
fz_stream *stm;
img_document *doc;
stm = fz_open_file(ctx, filename);
fz_try(ctx)
doc = img_open_document_with_stream(ctx, stm);
fz_always(ctx)
fz_drop_stream(ctx, stm);
fz_catch(ctx)
fz_rethrow(ctx);
return doc;
}
static int
img_recognize(fz_context *doc, const char *magic)
{
char *ext = strrchr(magic, '.');
if (ext)
{
if (!fz_strcasecmp(ext, ".png") || !fz_strcasecmp(ext, ".jpg") ||
!fz_strcasecmp(ext, ".jpeg") || !fz_strcasecmp(ext, ".jfif") ||
!fz_strcasecmp(ext, ".jfif-tbnl") || !fz_strcasecmp(ext, ".jpe") ||
!fz_strcasecmp(ext, ".gif") || !fz_strcasecmp(ext, ".bmp"))
return 100;
}
if (!strcmp(magic, "png") || !strcmp(magic, "image/png") ||
!strcmp(magic, "jpg") || !strcmp(magic, "image/jpeg") ||
!strcmp(magic, "jpeg") || !strcmp(magic, "image/pjpeg") ||
!strcmp(magic, "jpe") || !strcmp(magic, "jfif") ||
!strcmp(magic, "gif") || !strcmp(magic, "image/gif") ||
!strcmp(magic, "bmp") || !strcmp(magic, "image/bmp"))
return 100;
return 0;
}
fz_document_handler img_document_handler =
{
(fz_document_recognize_fn *)&img_recognize,
(fz_document_open_fn *)&img_open_document,
(fz_document_open_with_stream_fn *)&img_open_document_with_stream
};
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