introduce image_renderer framework

This will allow to support bmp and png

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 102 insertions, 0 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index 93e360b30..be3ea1cf5 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -38,6 +38,11 @@ config BITREV
 config QSORT
 	bool
 
+config IMAGE_RENDERER
+	bool
+	depends on VIDEO
+	select FILETYPE
+
 config BMP
 	bool
 
diff --git a/lib/Makefile b/lib/Makefile
index 997ba104b..237daf1dc 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -35,3 +35,4 @@ obj-$(CONFIG_BCH)	+= bch.o
 obj-$(CONFIG_BITREV)	+= bitrev.o
 obj-$(CONFIG_QSORT)	+= qsort.o
 obj-$(CONFIG_BMP)	+= bmp.o graphic_utils.o
+obj-$(CONFIG_IMAGE_RENDERER)	+= image_renderer.o
diff --git a/lib/image_renderer.c b/lib/image_renderer.c
new file mode 100644
index 000000000..b08f6bf2a
--- /dev/null
+++ b/lib/image_renderer.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * GPL v2
+ */
+
+#include <common.h>
+#include <fb.h>
+#include <image_renderer.h>
+#include <errno.h>
+#include <fs.h>
+#include <malloc.h>
+
+static LIST_HEAD(image_renderers);
+
+static struct image_renderer *get_renderer(void* buf)
+{
+	struct image_renderer *ir;
+	enum filetype type = file_detect_type(buf);
+
+	list_for_each_entry(ir, &image_renderers, list) {
+		if (ir->type == type)
+			return ir;
+	}
+
+	return NULL;
+}
+
+struct image *image_renderer_open(const char* file)
+{
+	void *data;
+	int size;
+	struct image_renderer *ir;
+	struct image *img;
+	int ret;
+
+	data = read_file(file, &size);
+	if (!data) {
+		printf("unable to read %s\n", file);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ir = get_renderer(data);
+	if (!ir) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+	img = ir->open(data, size);
+	if (IS_ERR(img)) {
+		ret = PTR_ERR(img);
+		goto out;
+	}
+	img->ir = ir;
+	if (!ir->keep_file_data)
+		free(data);
+
+	return img;
+out:
+	free(data);
+	return ERR_PTR(ret);
+}
+
+void image_renderer_close(struct image *img)
+{
+	if (!img)
+		return;
+
+	img->ir->close(img);
+
+	free(img);
+}
+
+int image_renderer_image(struct fb_info *info, struct image *img, void* fb,
+	    int startx, int starty, void* offscreenbuf)
+{
+	return img->ir->renderer(info, img, fb, startx, starty, offscreenbuf);
+}
+
+int image_renderer_register(struct image_renderer *ir)
+{
+	if (!ir || !ir->type || !ir->renderer || !ir->open || !ir->close)
+		return -EIO;
+
+	list_add_tail(&ir->list, &image_renderers);
+
+	return 0;
+}
+
+void image_renderer_unregister(struct image_renderer *ir)
+{
+	if (!ir)
+		return;
+
+	list_del(&ir->list);
+}