VrShell: implement insecure content warning display

chrome/browser/android/vr_shell/vr_shell_icons.h

+// Copyright 2016 The Chromium Authors. All rights reserved.

[bajones, 2016/09/22 22:13:30]

Given that these icons will probably be removed very soon let's move this file
and the icons into a vr_shell/icons folder to keep things a bit cleaner.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Helper for loading bitmaps created by Gimp's "export as .c file" function.

[bajones, 2016/09/22 22:13:30]

I hate to ask, but it seems like there's some license implications here?

+//
+// This is a temporary placeholder since a prerequisite patch which we
+// need for creating these images from text strings is not yet landed.
+// TODO(klausw): delete this file and the icon files ASAP.
+
+#ifndef CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_ICONS_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_ICONS_H_
+
+typedef struct {
+  unsigned int width;
+  unsigned int height;
+  unsigned int bytes_per_pixel; /* 2:RGB16, 3:RGB, 4:RGBA */
+  const char* rle_pixel_data;
+} icon_rle_image_t;
+
+// Load the two individual image files.
+#include "chrome/browser/android/vr_shell/icon_not_secure_small.h"
+#include "chrome/browser/android/vr_shell/icon_not_secure_verbose.h"
+
+// Run length decoding macro. This is as generated by Gimp's export,
+// just reformatted for line length limits.
+
+#define ICON_RUN_LENGTH_DECODE(image_buf, rle_data, size, bpp)          \
+  do {                                                                  \
+    unsigned int __bpp;                                                 \
+    char* __ip;                                                         \
+    const char *__il, *__rd;                                            \
+    __bpp = (bpp);                                                      \
+    __ip = (image_buf);                                                 \
+    __il = __ip + (size)*__bpp;                                         \
+    __rd = (rle_data);                                                  \
+    if (__bpp > 3) { /* RGBA */                                         \
+      while (__ip < __il) {                                             \
+        unsigned int __l = *(__rd++);                                   \
+        if (__l & 128) {                                                \
+          __l = __l - 128;                                              \
+          do {                                                          \
+            memcpy(__ip, __rd, 4);                                      \
+            __ip += 4;                                                  \
+          } while (--__l);                                              \
+          __rd += 4;                                                    \
+        } else {                                                        \
+          __l *= 4;                                                     \
+          memcpy(__ip, __rd, __l);                                      \
+          __ip += __l;                                                  \
+          __rd += __l;                                                  \
+        }                                                               \
+      }                                                                 \
+    } else { /* RGB */                                                  \
+      while (__ip < __il) {                                             \
+        unsigned int __l = *(__rd++);                                   \
+        if (__l & 128) {                                                \
+          __l = __l - 128;                                              \
+          do {                                                          \
+            memcpy(__ip, __rd, 3);                                      \
+            __ip += 3;                                                  \
+          } while (--__l);                                              \
+          __rd += 3;                                                    \
+        } else {                                                        \
+          __l *= 3;                                                     \
+          memcpy(__ip, __rd, __l);                                      \
+          __ip += __l;                                                  \
+          __rd += __l;                                                  \
+        }                                                               \
+      }                                                                 \
+    }                                                                   \
+  } while (0)
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_ICONS_H_