From 09bb1dc2a0cbea13b9ad27f626d2c9e16984ebf9 Mon Sep 17 00:00:00 2001
From: Robin Watts <robin.watts@artifex.com>
Date: Fri, 3 May 2013 13:02:10 +0100
Subject: Simple Image file format recogniser

Now can open jpeg/png/tiff files within mupdf.
---
 image/muimage.c | 142 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 image/muimage.c

(limited to 'image/muimage.c')

diff --git a/image/muimage.c b/image/muimage.c
new file mode 100644
index 00000000..0577f1c5
--- /dev/null
+++ b/image/muimage.c
@@ -0,0 +1,142 @@
+#include "fitz-internal.h"
+#include "muimage.h"
+
+#include <ctype.h> /* for tolower */
+
+#define DPI 72.0f
+
+static void image_init_document(image_document *doc);
+
+struct image_document_s
+{
+	fz_document super;
+
+	fz_context *ctx;
+	fz_stream *file;
+	fz_image *image;
+};
+
+image_document *
+image_open_document_with_stream(fz_context *ctx, fz_stream *file)
+{
+	image_document *doc;
+	fz_buffer *buffer = NULL;
+
+	doc = fz_malloc_struct(ctx, image_document);
+	image_init_document(doc);
+	doc->ctx = ctx;
+	doc->file = fz_keep_stream(file);
+
+	fz_var(buffer);
+
+	fz_try(ctx)
+	{
+		buffer = fz_read_all(doc->file, 1024);
+		doc->image = fz_new_image_from_buffer(ctx, buffer);
+		buffer = NULL;
+	}
+	fz_catch(ctx)
+	{
+		fz_drop_buffer(ctx, buffer);
+		image_close_document(doc);
+		fz_rethrow(ctx);
+	}
+
+	return doc;
+}
+
+image_document *
+image_open_document(fz_context *ctx, const char *filename)
+{
+	fz_stream *file;
+	image_document *doc;
+
+	file = fz_open_file(ctx, filename);
+	if (!file)
+		fz_throw(ctx, "cannot open file '%s': %s", filename, strerror(errno));
+
+	fz_try(ctx) {
+		doc = image_open_document_with_stream(ctx, file);
+	} fz_always(ctx) {
+		fz_close(file);
+	} fz_catch(ctx) {
+		fz_rethrow(ctx);
+	}
+
+	return doc;
+}
+
+void
+image_close_document(image_document *doc)
+{
+	fz_context *ctx = doc->ctx;
+	fz_drop_image(ctx, doc->image);
+	fz_close(doc->file);
+	fz_free(ctx, doc);
+}
+
+int
+image_count_pages(image_document *doc)
+{
+	return 1;
+}
+
+image_page *
+image_load_page(image_document *doc, int number)
+{
+	if (number != 0)
+		return NULL;
+
+	return (image_page *)doc->image;
+}
+
+void
+image_free_page(image_document *doc, image_page *page)
+{
+}
+
+fz_rect *
+image_bound_page(image_document *doc, image_page *page, fz_rect *bbox)
+{
+	fz_image *image = (fz_image *)page;
+	bbox->x0 = bbox->y0 = 0;
+	bbox->x1 = image->w * DPI / image->xres;
+	bbox->y1 = image->h * DPI / image->yres;
+	return bbox;
+}
+
+void
+image_run_page(image_document *doc, image_page *page, fz_device *dev, const fz_matrix *ctm, fz_cookie *cookie)
+{
+	fz_matrix local_ctm = *ctm;
+	fz_image *image = (fz_image *)page;
+	float w = image->w * DPI / image->xres;
+	float h = image->h * DPI / image->yres;
+	fz_pre_scale(&local_ctm, w, h);
+	fz_fill_image(dev, image, &local_ctm, 1);
+}
+
+static int
+image_meta(image_document *doc, int key, void *ptr, int size)
+{
+	switch(key)
+	{
+	case FZ_META_FORMAT_INFO:
+		sprintf((char *)ptr, "IMAGE");
+		return FZ_META_OK;
+	default:
+		return FZ_META_UNKNOWN_KEY;
+	}
+}
+
+static void
+image_init_document(image_document *doc)
+{
+	doc->super.close = (void*)image_close_document;
+	doc->super.count_pages = (void*)image_count_pages;
+	doc->super.load_page = (void*)image_load_page;
+	doc->super.bound_page = (void*)image_bound_page;
+	doc->super.run_page_contents = (void*)image_run_page;
+	doc->super.free_page = (void*)image_free_page;
+	doc->super.meta = (void*)image_meta;
+}
-- 
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