--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/native/libsplashscreen/splashscreen_png.c	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "splashscreen_impl.h"
+
+#include <png.h>
+
+#include <setjmp.h>
+
+#define SIG_BYTES 8
+
+void PNGAPI
+my_png_read_stream(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+    png_uint_32 check;
+
+    SplashStream * stream = (SplashStream*)png_get_io_ptr(png_ptr);
+    check = stream->read(stream, data, length);
+    if (check != length)
+        png_error(png_ptr, "Read Error");
+}
+
+int
+SplashDecodePng(Splash * splash, png_rw_ptr read_func, void *io_ptr)
+{
+    int stride;
+    ImageFormat srcFormat;
+    png_uint_32 i, rowbytes;
+    volatile png_bytepp row_pointers = NULL;
+    volatile png_bytep image_data = NULL;
+    int success = 0;
+    double gamma;
+
+    png_structp png_ptr = NULL;
+    png_infop info_ptr = NULL;
+
+    png_uint_32 width, height;
+    int bit_depth, color_type;
+
+    ImageRect srcRect, dstRect;
+
+    png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+    if (!png_ptr) {
+        goto done;
+    }
+
+    info_ptr = png_create_info_struct(png_ptr);
+    if (!info_ptr) {
+        goto done;
+    }
+
+#ifdef __APPLE__
+    /* use setjmp/longjmp versions that do not save/restore the signal mask */
+    if (_setjmp(png_set_longjmp_fn(png_ptr, _longjmp, sizeof(jmp_buf)))) {
+#else
+    if (setjmp(png_jmpbuf(png_ptr))) {
+#endif
+        goto done;
+    }
+
+    png_set_read_fn(png_ptr, io_ptr, read_func);
+
+    png_set_sig_bytes(png_ptr, SIG_BYTES);      /* we already read the 8 signature bytes */
+
+    png_read_info(png_ptr, info_ptr);   /* read all PNG info up to image data */
+
+    png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
+        NULL, NULL, NULL);
+
+    /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits,
+     * transparency chunks to full alpha channel; strip 16-bit-per-sample
+     * images to 8 bits per sample; and convert grayscale to RGB[A]
+     * this may be sub-optimal but this simplifies implementation */
+
+    png_set_expand(png_ptr);
+    png_set_tRNS_to_alpha(png_ptr);
+    png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
+    png_set_strip_16(png_ptr);
+    png_set_gray_to_rgb(png_ptr);
+
+    if (png_get_gAMA(png_ptr, info_ptr, &gamma))
+        png_set_gamma(png_ptr, 2.2, gamma);
+
+    png_set_interlace_handling(png_ptr);
+    png_read_update_info(png_ptr, info_ptr);
+
+    rowbytes = png_get_rowbytes(png_ptr, info_ptr);
+
+    if (!SAFE_TO_ALLOC(rowbytes, height)) {
+        goto done;
+    }
+
+    if ((image_data = (unsigned char *) malloc(rowbytes * height)) == NULL) {
+        goto done;
+    }
+
+    if (!SAFE_TO_ALLOC(height, sizeof(png_bytep))) {
+        goto done;
+    }
+    if ((row_pointers = (png_bytepp) malloc(height * sizeof(png_bytep)))
+            == NULL) {
+        goto done;
+    }
+
+    for (i = 0; i < height; ++i)
+        row_pointers[i] = image_data + i * rowbytes;
+
+    png_read_image(png_ptr, row_pointers);
+
+    SplashCleanup(splash);
+
+    splash->width = width;
+    splash->height = height;
+
+    if (!SAFE_TO_ALLOC(splash->width, splash->imageFormat.depthBytes)) {
+        goto done;
+    }
+    stride = splash->width * splash->imageFormat.depthBytes;
+
+    if (!SAFE_TO_ALLOC(splash->height, stride)) {
+        goto done;
+    }
+    splash->frameCount = 1;
+    splash->frames = (SplashImage *)
+        malloc(sizeof(SplashImage) * splash->frameCount);
+
+    if (splash->frames == NULL) {
+        goto done;
+    }
+
+    splash->loopCount = 1;
+    splash->frames[0].bitmapBits = malloc(stride * splash->height);
+    if (splash->frames[0].bitmapBits == NULL) {
+        free(splash->frames);
+        goto done;
+    }
+    splash->frames[0].delay = 0;
+
+    /* FIXME: sort out the real format */
+    initFormat(&srcFormat, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF);
+    srcFormat.byteOrder = BYTE_ORDER_MSBFIRST;
+
+    initRect(&srcRect, 0, 0, width, height, 1, rowbytes,
+        image_data, &srcFormat);
+    initRect(&dstRect, 0, 0, width, height, 1, stride,
+        splash->frames[0].bitmapBits, &splash->imageFormat);
+    convertRect(&srcRect, &dstRect, CVT_COPY);
+
+    SplashInitFrameShape(splash, 0);
+
+    png_read_end(png_ptr, NULL);
+    success = 1;
+
+  done:
+    free(row_pointers);
+    free(image_data);
+    png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+    return success;
+}
+
+int
+SplashDecodePngStream(Splash * splash, SplashStream * stream)
+{
+    unsigned char sig[SIG_BYTES];
+    int success = 0;
+
+    stream->read(stream, sig, SIG_BYTES);
+    if (png_sig_cmp(sig, 0, SIG_BYTES)) {
+        goto done;
+    }
+    success = SplashDecodePng(splash, my_png_read_stream, stream);
+
+  done:
+    return success;
+}