[RFC weston 3/3] client: image client requesting for scaling filter type.

[Sameer Lattannavar]

Modify existing sample weston client image application to add
a scaling_filter request through commandline parameter.

Signed-off-by: Sameer Lattannavar <sameer.lattannavar at intel.com>
---
 clients/image.c  | 49 ++++++++++++++++++++++++++++++++++++++++--------
 clients/window.c |  7 +++++++
 clients/window.h |  4 ++++
 3 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/clients/image.c b/clients/image.c
index 0a8fb5b5..b1bc5637 100644
--- a/clients/image.c
+++ b/clients/image.c
@@ -44,6 +44,17 @@
 #include "window.h"
 #include "shared/cairo-util.h"
 
+enum weston_scaling_filters {
+	WDRM_SCALING_FILTER_DEFAULT = 0,
+	WDRM_SCALING_FILTER_MEDIUM,
+	WDRM_SCALING_FILTER_BILINEAR,
+	WDRM_SCALING_FILTER_NN,
+	WDRM_SCALING_FILTER_NN_IS_ONLY,
+	WDRM_SCALING_FILTER_EDGE_ENHANCE,
+	WDRM_SCALING_FILTER_INVALID,
+	WDRM_SCALING_FILTER__COUNT
+};
+
 struct image {
 	struct window *window;
 	struct widget *widget;
@@ -355,6 +366,8 @@ close_handler(void *data)
 	free(image);
 }
 
+int request_scaling_filter;
+
 static struct image *
 image_create(struct display *display, const char *filename,
 	     int *image_counter)
@@ -402,20 +415,38 @@ image_create(struct display *display, const char *filename,
 	widget_set_axis_handler(image->widget, axis_handler);
 	window_set_key_handler(image->window, key_handler);
 	widget_schedule_resize(image->widget, 500, 400);
+	if (request_scaling_filter)
+		window_set_scaling_filter(image->window,
+				WDRM_SCALING_FILTER_NN);
 
 	return image;
 }
 
+static void
+usage()
+{
+	fprintf(stderr, "Usage: weston-image [OPTIONS]\n\n");
+	fprintf(stderr, "Options:"
+			"-is <Image Path>\t Image to display withi \t"
+			"scaling filter type for integer scaling\n"
+			"<Image/s> ...\n"
+			"-h\tThis help text\n\n");
+
+	exit(0);
+}
+
 int
 main(int argc, char *argv[])
 {
 	struct display *d;
 	int i;
 	int image_counter = 0;
-
-	if (argc <= 1 || argv[1][0]=='-') {
-		printf("Usage: %s image...\n", argv[0]);
-		return 1;
+	for (i = 0; i < argc; i++) {
+		if (strcmp("-is", argv[i]) == 0  && argc == 3) {
+			request_scaling_filter = 1;
+		} else if (argc <= 1 || (strcmp("-h", argv[i]) == 0)
+				|| (strcmp("-help", argv[i]) == 0))
+			usage();
 	}
 
 	d = display_create(&argc, argv);
@@ -424,10 +455,12 @@ main(int argc, char *argv[])
 			strerror(errno));
 		return -1;
 	}
-
-	for (i = 1; i < argc; i++)
-		image_create(d, argv[i], &image_counter);
-
+	if (request_scaling_filter) {
+		image_create(d, argv[2], &image_counter);
+	} else {
+		for (i = 1; i < argc; i++)
+			image_create(d, argv[i], &image_counter);
+	}
 	if (image_counter > 0)
 		display_run(d);
 
diff --git a/clients/window.c b/clients/window.c
index 2bd303ee..03ec80ab 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -1505,6 +1505,13 @@ window_set_buffer_scale(struct window *window,
 				    scale);
 }
 
+void
+window_set_scaling_filter(struct window *window,
+				int scaling_filter)
+{
+	wl_surface_set_scaling_filter(window->main_surface->surface,
+					scaling_filter);
+}
 uint32_t
 window_get_buffer_scale(struct window *window)
 {
diff --git a/clients/window.h b/clients/window.h
index c66dd065..f86c579c 100644
--- a/clients/window.h
+++ b/clients/window.h
@@ -345,6 +345,10 @@ void
 window_set_buffer_scale(struct window *window,
                         int32_t scale);
 
+void
+window_set_scaling_filter(struct window *window,
+		int scaling_filter);
+
 uint32_t
 window_get_output_scale(struct window *window);
 
-- 
2.17.1