FB2PNG: Add fb2png source to TWRP
* Add Source of fb2png to TWRP tree
* Android.mk by PhilZ-cwm6
* Makefile for CrossCompiling via external toolchan by me (Talustus)
Change-Id: If9680688df6e4c9c567f74f46dfc303566b868ba
diff --git a/fb2png/img_process.c b/fb2png/img_process.c
new file mode 100644
index 0000000..eb75e9a
--- /dev/null
+++ b/fb2png/img_process.c
@@ -0,0 +1,254 @@
+/*
+ * -- http://android-fb2png.googlecode.com/svn/trunk/img_process.c --
+ *
+ * Copyright 2011, Kyan He <kyan.ql.he@gmail.com>
+ *
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <png.h>
+
+#include "img_process.h"
+#include "log.h"
+
+int rgb565_to_rgb888(const char* src, char* dst, size_t pixel)
+{
+ struct rgb565 *from;
+ struct rgb888 *to;
+
+ from = (struct rgb565 *) src;
+ to = (struct rgb888 *) dst;
+
+ int i = 0;
+ /* traverse pixel of the row */
+ while(i++ < pixel) {
+
+ to->r = from->r;
+ to->g = from->g;
+ to->b = from->b;
+ /* scale */
+ to->r <<= 3;
+ to->g <<= 2;
+ to->b <<= 3;
+
+ to++;
+ from++;
+ }
+
+ return 0;
+}
+
+int argb8888_to_rgb888(const char* src, char* dst, size_t pixel)
+{
+ int i;
+ struct argb8888 *from;
+ struct rgb888 *to;
+
+ from = (struct argb8888 *) src;
+ to = (struct rgb888 *) dst;
+
+ i = 0;
+ /* traverse pixel of the row */
+ while(i++ < pixel) {
+
+ to->r = from->r;
+ to->g = from->g;
+ to->b = from->b;
+
+ to++;
+ from++;
+ }
+
+ return 0;
+}
+
+int abgr8888_to_rgb888(const char* src, char* dst, size_t pixel)
+{
+ int i;
+ struct abgr8888 *from;
+ struct rgb888 *to;
+
+ from = (struct abgr8888 *) src;
+ to = (struct rgb888 *) dst;
+
+ i = 0;
+ /* traverse pixel of the row */
+ while(i++ < pixel) {
+
+ to->r = from->r;
+ to->g = from->g;
+ to->b = from->b;
+
+ to++;
+ from++;
+ }
+
+ return 0;
+}
+
+int bgra8888_to_rgb888(const char* src, char* dst, size_t pixel)
+{
+ int i;
+ struct bgra8888 *from;
+ struct rgb888 *to;
+
+ from = (struct bgra8888 *) src;
+ to = (struct rgb888 *) dst;
+
+ i = 0;
+ /* traverse pixel of the row */
+ while(i++ < pixel) {
+
+ to->r = from->r;
+ to->g = from->g;
+ to->b = from->b;
+
+ to++;
+ from++;
+ }
+
+ return 0;
+}
+
+int rgba8888_to_rgb888(const char* src, char* dst, size_t pixel)
+{
+ int i;
+ struct rgba8888 *from;
+ struct rgb888 *to;
+
+ from = (struct rgba8888 *) src;
+ to = (struct rgb888 *) dst;
+
+ i = 0;
+ /* traverse pixel of the row */
+ while(i++ < pixel) {
+
+ to->r = from->r;
+ to->g = from->g;
+ to->b = from->b;
+
+ to++;
+ from++;
+ }
+
+ return 0;
+}
+
+static void
+stdio_write_func (png_structp png, png_bytep data, png_size_t size)
+{
+ FILE *fp;
+ size_t ret;
+
+ fp = png_get_io_ptr (png);
+ while (size) {
+ ret = fwrite (data, 1, size, fp);
+ size -= ret;
+ data += ret;
+ if (size && ferror (fp))
+ E("write: %m\n");
+ }
+}
+
+static void
+png_simple_output_flush_fn (png_structp png_ptr)
+{
+}
+
+static void
+png_simple_error_callback (png_structp png,
+ png_const_charp error_msg)
+{
+ E("png error: %s\n", error_msg);
+}
+
+static void
+png_simple_warning_callback (png_structp png,
+ png_const_charp error_msg)
+{
+ fprintf(stderr, "png warning: %s\n", error_msg);
+}
+
+/* save rgb888 to png format in fp */
+int save_png(const char* path, const char* data, int width, int height)
+{
+ FILE *fp;
+ png_byte **volatile rows;
+ png_struct *png;
+ png_info *info;
+
+ fp = fopen(path, "w");
+ if (!fp) {
+ int errsv = errno;
+ E("Cannot open file %s for writing.\n", path);
+ return errsv;
+ }
+
+ rows = malloc(height * sizeof rows[0]);
+ if (!rows) goto oops;
+
+ int i;
+ for (i = 0; i < height; i++)
+ rows[i] = (png_byte *) data + i * width * 3 /*fb.stride*/;
+
+ png = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL,
+ png_simple_error_callback,
+ png_simple_warning_callback);
+ if (!png) {
+ E("png_create_write_struct failed\n");
+ goto oops;
+ }
+
+ info = png_create_info_struct (png);
+ if (!info) {
+ E("png_create_info_struct failed\n");
+ png_destroy_write_struct (&png, NULL);
+ goto oops;
+ }
+
+ png_set_write_fn (png, fp, stdio_write_func, png_simple_output_flush_fn);
+ png_set_IHDR (png, info,
+ width,
+ height,
+#define DEPTH 8
+ DEPTH,
+ PNG_COLOR_TYPE_RGB,
+ PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_DEFAULT,
+ PNG_FILTER_TYPE_DEFAULT);
+
+ png_color_16 white;
+
+ white.gray = (1 << DEPTH) - 1;
+ white.red = white.blue = white.green = white.gray;
+
+ png_set_bKGD (png, info, &white);
+ png_write_info (png, info);
+
+ png_write_image (png, rows);
+ png_write_end (png, info);
+
+ png_destroy_write_struct (&png, &info);
+
+ fclose(fp);
+ free (rows);
+ return 0;
+
+oops:
+ fclose(fp);
+ free (rows);
+ return -1;
+}