[mime-data] Allow embedding of arbitrary mime-types.

Use the surface user-data array allow to store an arbitrary set of
alternate image representations keyed by an interned string (which
ensures that it has a unique key in the user-visible namespace).

Update the API to mirror that of cairo_surface_set_user_data() [i.e.
return a status indicator] and switch internal users of the mime-data to
the public functions.

1 files changed, 111 insertions, 0 deletions

diff --git a/test/mime-data.c b/test/mime-data.c
new file mode 100644
index 000000000..b36491539
--- /dev/null
+++ b/test/mime-data.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright © 2008 Chris Wilson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Chris Wilson not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Chris Wilson makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+#include <stdio.h>
+#include <errno.h>
+
+/* Basic test to exercise the new mime-data embedding. */
+
+static cairo_status_t
+read_jpg_file (const cairo_test_context_t *ctx,
+	       unsigned char **data_out,
+	       unsigned int *length_out)
+{
+    const char jpg_filename[] = "romedalen.jpg";
+    FILE *file;
+    unsigned char *buf;
+    unsigned int len;
+
+    file = fopen (jpg_filename, "rb");
+    if (file == NULL) {
+	char filename[4096];
+
+	/* try again with srcdir */
+	snprintf (filename, sizeof (filename),
+		  "%s/%s", ctx->srcdir, jpg_filename);
+	file = fopen (filename, "rb");
+    }
+    if (file == NULL) {
+	switch (errno) {
+	case ENOMEM:
+	    return CAIRO_STATUS_NO_MEMORY;
+	default:
+	    return CAIRO_STATUS_FILE_NOT_FOUND;
+	}
+    }
+
+    fseek (file, 0, SEEK_END);
+    len = ftell (file);
+    fseek (file, 0, SEEK_SET);
+
+    buf = xmalloc (len);
+    *length_out = fread (buf, 1, len, file);
+    fclose (file);
+    if (*length_out != len) {
+	free (buf);
+	return CAIRO_STATUS_READ_ERROR;
+    }
+
+    *data_out = buf;
+    return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    const cairo_test_context_t *ctx = cairo_test_get_context (cr);
+    cairo_surface_t *image;
+    unsigned char *jpg_data;
+    unsigned int jpg_len;
+    cairo_status_t status;
+
+    status = read_jpg_file (ctx, &jpg_data, &jpg_len);
+    if (status) {
+	return cairo_test_status_from_status (ctx, status);
+    }
+
+    image = cairo_test_create_surface_from_png (ctx, "romedalen.png");
+    status = cairo_surface_set_mime_data (image, CAIRO_MIME_TYPE_JPEG,
+					  jpg_data, jpg_len, free);
+    if (status) {
+	cairo_surface_destroy (image);
+	return cairo_test_status_from_status (ctx, status);
+    }
+
+    cairo_set_source_surface (cr, image, 0, 0);
+    cairo_surface_destroy (image);
+    cairo_paint (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (mime_data,
+	    "Check that the mime-data embedding works",
+	    "jpeg, api", /* keywords */
+	    NULL, /* requirements */
+	    10, 10,
+	    NULL, draw)