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tests: Add load_surface_from_png()

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Loads an image from disk via cairo, and copies data into a weston test
surface for internal use.

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
This commit is contained in:
Bryce Harrington 2015-05-14 14:18:56 -07:00
parent 2eaf7d78ba
commit 198f941ec8
1 changed files with 56 additions and 16 deletions
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72
tests/internal-screenshot-test.c
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@ -61,6 +61,60 @@ write_surface_as_png(const struct surface* weston_surface, const char *fname) {
return true;
}
/** load_surface_from_png()
*
* Reads a PNG image from disk using the given filename (and path)
* and returns as a freshly allocated weston test surface.
*
* @returns weston test surface with image, which should be free'd
* when no longer used; or, NULL in case of error.
*/
static struct surface*
load_surface_from_png(const char *fname) {
struct surface *reference;
cairo_surface_t *reference_cairo_surface;
cairo_status_t status;
size_t source_data_size;
int stride;
printf("Loading reference image %s\n", fname);
reference_cairo_surface = cairo_image_surface_create_from_png(fname);
status = cairo_surface_status(reference_cairo_surface);
if (status != CAIRO_STATUS_SUCCESS) {
printf("Could not open %s: %s\n", fname, cairo_status_to_string(status));
cairo_surface_destroy(reference_cairo_surface);
return NULL;
}
/* Disguise the cairo surface in a weston test surface */
reference = xzalloc(sizeof *reference);
if (reference == NULL) {
perror("xzalloc reference");
cairo_surface_destroy(reference_cairo_surface);
return NULL;
}
reference->width = cairo_image_surface_get_width(reference_cairo_surface);
reference->height = cairo_image_surface_get_height(reference_cairo_surface);
stride = cairo_image_surface_get_stride(reference_cairo_surface);
source_data_size = stride * reference->height;
/* Allocate new buffer for our weston reference, and copy the data from
the cairo surface so we can destroy it */
reference->data = xzalloc(source_data_size);
if (reference->data == NULL) {
perror("xzalloc reference data");
cairo_surface_destroy(reference_cairo_surface);
free(reference);
return NULL;
}
memcpy(reference->data,
cairo_image_surface_get_data(reference_cairo_surface),
source_data_size);
cairo_surface_destroy(reference_cairo_surface);
return reference;
}
/** create_screenshot_surface()
*
* Allocates and initializes a weston test surface for use in
@ -94,8 +148,6 @@ TEST(internal_screenshot)
struct surface *reference = NULL;
struct rectangle clip;
const char *fname;
cairo_surface_t *reference_cairo_surface;
cairo_status_t status;
bool match = false;
bool dump_all_images = true;
@ -131,19 +183,8 @@ TEST(internal_screenshot)
/* Load reference image */
fname = screenshot_reference_filename("internal-screenshot", 0);
printf("Loading reference image %s\n", fname);
reference_cairo_surface = cairo_image_surface_create_from_png(fname);
status = cairo_surface_status(reference_cairo_surface);
if (status != CAIRO_STATUS_SUCCESS) {
printf("Could not open %s: %s\n", fname, cairo_status_to_string(status));
cairo_surface_destroy(reference_cairo_surface);
assert(status != CAIRO_STATUS_SUCCESS);
}
/* Disguise the cairo surface in a weston test surface */
reference = xzalloc(sizeof *reference);
reference->width = cairo_image_surface_get_width(reference_cairo_surface);
reference->height = cairo_image_surface_get_height(reference_cairo_surface);
reference->data = cairo_image_surface_get_data(reference_cairo_surface);
reference = load_surface_from_png(fname);
assert(reference);
/* Test check_surfaces_equal()
* We expect this to fail since the clock will differ from when we made the reference image
@ -163,7 +204,6 @@ TEST(internal_screenshot)
printf("Clip: %d,%d %d x %d\n", clip.x, clip.y, clip.width, clip.height);
match = check_surfaces_match_in_clip(screenshot, reference, &clip);
printf("Screenshot %s reference image in clipped area\n", match? "matches" : "doesn't match");
cairo_surface_destroy(reference_cairo_surface);
free(reference);
/* Test dumping of non-matching images */