Rendering Insecure WebVR Warnings into a texture with Skia.

chrome/browser/android/vr_shell/textures/insecure_content_transient_texture.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/android/vr_shell/textures/insecure_content_transient_texture.h"
+
+#include "cc/paint/skia_paint_canvas.h"
+#include "chrome/grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/paint_vector_icon.h"
+#include "ui/gfx/vector_icon_types.h"
+#include "ui/vector_icons/vector_icons.h"
+
+namespace vr_shell {
+
+namespace {
+
+const SkColor kBackgroundColor = 0xCC1A1A1A;
+const SkColor kForegroundColor = SK_ColorWHITE;
+
+}  // namespace
+
+InsecureContentTransientTexture::InsecureContentTransientTexture(
+    int texture_handle,
+    int texture_size)
+    : UITexture(texture_handle, texture_size) {
+  DCHECK(texture_size_ % 2 == 0);

[mthiesse, 2017/04/13 15:31:37]

Comment on why the DCHECK

+  height_ = texture_size_ / 2;
+}
+
+InsecureContentTransientTexture::~InsecureContentTransientTexture() = default;
+
+void InsecureContentTransientTexture::Draw(gfx::Canvas* canvas) {
+  cc::PaintFlags flags;
+  flags.setColor(kBackgroundColor);
+  canvas->DrawRoundRect(gfx::Rect(texture_size_, height_), height_ * 0.1,
+                        flags);
+  canvas->Save();
+  canvas->Translate({height_ * 0.1, height_ * 0.25});
+  PaintVectorIcon(canvas, ui::kInfoOutlineIcon, height_ * 0.5,
+                  kForegroundColor);
+  canvas->Restore();
+  canvas->Save();
+  canvas->Translate({height_ * 0.7, height_ * 0.5});
+  flags.setColor(kForegroundColor);
+  flags.setTextSize(height_ * 0.1);
+  auto text =
+      l10n_util::GetStringUTF8(IDS_PAGE_INFO_INSECURE_WEBVR_CONTENT_TRANSIENT);
+  DrawText(canvas, text, flags, height_ * 1.2, true);
+  canvas->Restore();
+}
+
+void InsecureContentTransientTexture::SetSize() {
+  size_.SetSize(texture_size_, height_);
+}
+
+}  // namespace vr_shell