1 files changed, 141 insertions, 0 deletions

diff --git a/apps/plugins/imageviewer/png/png_decoder.h b/apps/plugins/imageviewer/png/png_decoder.h
new file mode 100644
index 0000000000..4ca2a51277
--- /dev/null
+++ b/apps/plugins/imageviewer/png/png_decoder.h
@@ -0,0 +1,141 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$id $
+ *
+ * Copyright (C) 2009 by Christophe Gouiran <bechris13250 -at- gmail -dot- com>
+ *
+ * Based on lodepng, a lightweight png decoder/encoder
+ * (c) 2005-2008 Lode Vandevenne
+ *
+ * Copyright (c) 2010 Marcin Bukat
+ *  - pixel format conversion & transparency handling
+ *  - adaptation of tinf (tiny inflate library)
+ *  - code refactoring & cleanups
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#define OUT_OF_MEMORY   9900
+#define FILE_TOO_LARGE  9910
+
+/* PNG chunk types signatures */
+/* critical chunks */
+#define PNG_CHUNK_IHDR 0x49484452
+#define PNG_CHUNK_PLTE 0x504c5445
+#define PNG_CHUNK_IDAT 0x49444154
+#define PNG_CHUNK_IEND 0x49454e44
+
+/* ancillary chunks */
+#define PNG_CHUNK_bKGD 0x624b4744
+#define PNG_CHUNK_cHRM 0x6348524d
+#define PNG_CHUNK_gAMA 0x67414d41
+#define PNG_CHUNK_hIST 0x68495354
+#define PNG_CHUNK_iCCP 0x69434350
+#define PNG_CHUNK_pHYs 0x70485973
+#define PNG_CHUNK_sBIT 0x73424954
+#define PNG_CHUNK_sPLT 0x73504c54
+#define PNG_CHUNK_sRGB 0x73524742
+#define PNG_CHUNK_tEXt 0x74455874
+#define PNG_CHUNK_tIME 0x74494d45
+#define PNG_CHUNK_tRNS 0x74524e53
+#define PNG_CHUNK_zTXt 0x7a545874
+
+/* PNG color types */
+#define PNG_COLORTYPE_GREY    0
+#define PNG_COLORTYPE_RGB     2
+#define PNG_COLORTYPE_PALETTE 3
+#define PNG_COLORTYPE_GREYA   4
+#define PNG_COLORTYPE_RGBA    6
+
+/* PNG filter types */
+#define PNG_FILTERTYPE_NONE    0
+#define PNG_FILTERTYPE_SUB     1
+#define PNG_FILTERTYPE_UP      2
+#define PNG_FILTERTYPE_AVERAGE 3
+#define PNG_FILTERTYPE_PAETH   4
+
+#define PNG_ERROR_MIN 27
+#define PNG_ERROR_MAX 74
+
+/* Typedefs */
+typedef struct LodePNG_InfoColor /*info about the color type of an image*/
+{
+    /*header (IHDR)*/
+    unsigned colorType; /*color type*/
+    unsigned bitDepth;  /*bits per sample*/
+
+    /*palette (PLTE)*/
+    unsigned char palette[256 * 4]; /*palette in RGBARGBA... order*/
+    size_t palettesize; /* palette size in number of colors 
+                         * (amount of bytes is 4 * palettesize)
+                         */
+
+    /*transparent color key (tRNS)*/
+    unsigned key_defined; /*is a transparent color key given?*/
+    unsigned key_r;       /*red component of color key*/
+    unsigned key_g;       /*green component of color key*/
+    unsigned key_b;       /*blue component of color key*/
+} LodePNG_InfoColor;
+
+typedef struct LodePNG_InfoPng /*information about the PNG image, except pixels and sometimes except width and height*/
+{
+    /*header (IHDR), palette (PLTE) and transparency (tRNS)*/
+    unsigned width;             /*width of the image in pixels -  filled in by decoder)*/
+    unsigned height;            /*height of the image in pixels - filled in by decoder)*/
+    unsigned compressionMethod; /*compression method of the original file*/
+    unsigned filterMethod;      /*filter method of the original file*/
+    unsigned interlaceMethod;   /*interlace method of the original file*/
+    LodePNG_InfoColor color;    /*color type and bits, palette, transparency*/
+
+    /*suggested background color (bKGD)*/
+    unsigned background_r;       /*red component of suggested background color*/
+    unsigned background_g;       /*green component of suggested background color*/
+    unsigned background_b;       /*blue component of suggested background color*/
+
+} LodePNG_InfoPng;
+
+typedef struct LodePNG_Decoder
+{
+    unsigned char *buf;      /* pointer to the buffer allocated for decoder
+                              * filled by LodePNG_Decoder_init()
+                              */
+    size_t  buf_size;  /* size of the buffer decoder is free to use
+                              * filled by LodePNG_Decoder_init()
+                              */
+    unsigned char *file;     /* ptr to raw png file loaded */
+    size_t file_size;        /* size of the raw png file in mem */ 
+    unsigned char *decoded_img; /* ptr to decoded PNG image in PNG pixel
+                                 * format. set by decodeGeneric()
+                                 */
+    unsigned int native_img_size; /* size of the image in native pixel 
+                                   * format 
+                                   */
+    LodePNG_InfoPng infoPng; /*info of the PNG image obtained after decoding*/
+    long error;
+} LodePNG_Decoder;
+
+/* Public functions prototypes */
+void LodePNG_Decoder_init(LodePNG_Decoder* decoder,
+                          uint8_t *buf,
+                          size_t buf_size);
+
+void LodePNG_decode(LodePNG_Decoder* decoder,
+                    uint8_t* in,
+                    size_t insize,
+                    void (*pf_progress)(int current, int total));
+
+void LodePNG_inspect(LodePNG_Decoder* decoder, uint8_t *in, size_t inlength);
+
+const char* LodePNG_perror(LodePNG_Decoder *decoder);