1 files changed, 85 insertions, 0 deletions
diff --git a/lib/png_pico.c b/lib/png_pico.c
new file mode 100644
index 0000000000..a0127f7674
--- /dev/null
+++ b/lib/png_pico.c
@@ -0,0 +1,85 @@
+#include <common.h>
+#include <errno.h>
+#include <malloc.h>
+#include <fb.h>
+#include <asm/byteorder.h>
+#include <init.h>
+#include <image_renderer.h>
+#include <graphic_utils.h>
+#include <linux/zlib.h>
+
+#include "picopng.h"
+#include "png.h"
+
+unsigned picopng_zlib_decompress(unsigned char* out, size_t outsize,
+				 const unsigned char* in, size_t insize)
+{
+	int err;
+
+	png_stream.next_in = in;
+	png_stream.avail_in = insize;
+
+	png_stream.next_out = out;
+	png_stream.avail_out = outsize;
+
+	err = zlib_inflateReset(&png_stream);
+	if (err != Z_OK) {
+		printk("zlib_inflateReset error %d\n", err);
+		zlib_inflateEnd(&png_stream);
+		zlib_inflateInit(&png_stream);
+	}
+
+	err = zlib_inflate(&png_stream, Z_FINISH);
+	if (err != Z_STREAM_END)
+		goto err;
+	return 0;
+
+err:
+	printk("Error %d while decompressing!\n", err);
+	printk("%p(%zd)->%p(%zd)\n", in, insize, out, outsize);
+	return -EIO;
+}
+
+struct image *png_open(char *inbuf, int insize)
+{
+	PNG_info_t *png_info;
+	int ret;
+	struct image *img = calloc(1, sizeof(struct image));
+
+	if (!img)
+		return ERR_PTR(-ENOMEM);
+
+	ret = png_uncompress_init();
+	if (ret)
+		goto err;
+
+	/* rgba */
+	png_info = PNG_decode(inbuf, insize);
+
+	if(PNG_error) {
+		printf("error %u:\n", PNG_error);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	img->width = png_info->width;
+	img->height = png_info->height;
+	img->bits_per_pixel = 4 << 3;
+	img->data = png_info->image->data;
+
+	pr_debug("png: %d x %d data@0x%p\n", img->width, img->height, img->data);
+
+	png_alloc_free_all();
+
+	return img;
+err:
+	png_alloc_free_all();
+	free(img);
+	return ERR_PTR(ret);
+}
+
+void png_close(struct image *img)
+{
+	free(img->data);
+	png_alloc_free_all();
+}