1 files changed, 111 insertions, 0 deletions
diff --git a/chromium/plat_support/graphics_utils.cpp b/chromium/plat_support/graphics_utils.cpp
new file mode 100644
index 0000000..c9e519b
--- /dev/null
+++ b/chromium/plat_support/graphics_utils.cpp
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Provides a webviewchromium glue layer adapter from the internal Android
+// graphics types into the types the chromium stack expects, and back.
+
+#define LOG_TAG "webviewchromium_plat_support"
+
+#include "android_webview/public/browser/draw_sw.h"
+
+#include <cstdlib>
+#include <jni.h>
+#include <utils/Log.h>
+#include "GraphicsJNI.h"
+
+#define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
+
+namespace android {
+namespace {
+
+struct PixelInfo : public AwPixelInfo {
+  PixelInfo(const SkBitmap* bitmap)
+      : bitmap_(bitmap) {
+    this->bitmap_->lockPixels();
+  }
+  ~PixelInfo() {
+    this->bitmap_->unlockPixels();
+    free(clip_region);
+  };
+  const SkBitmap* bitmap_;
+};
+
+AwPixelInfo* GetPixels(JNIEnv* env, jobject java_canvas) {
+  SkCanvas* canvas = GraphicsJNI::getNativeCanvas(env, java_canvas);
+  if (!canvas) return NULL;
+  SkDevice* device = canvas->getDevice();
+  if (!device) return NULL;
+  const SkBitmap* bitmap = &device->accessBitmap(true);
+  if (!bitmap->lockPixelsAreWritable()) return NULL;
+
+  PixelInfo* pixels = new PixelInfo(bitmap);
+  pixels->config = bitmap->config();
+  pixels->width = bitmap->width();
+  pixels->height = bitmap->height();
+  pixels->row_bytes = bitmap->rowBytes();
+  pixels->pixels = bitmap->getPixels();
+  const SkMatrix& matrix = canvas->getTotalMatrix();
+  for (int i = 0; i < 9; i++) {
+    pixels->matrix[i] = matrix.get(i);
+  }
+  // TODO: getTotalClip() is now marked as deprecated, but the replacement,
+  // getClipDeviceBounds, does not return the exact region, just the bounds.
+  // Work out what we should use instead.
+  const SkRegion& region = canvas->getTotalClip();
+  pixels->clip_region = NULL;
+  pixels->clip_region_size = region.writeToMemory(NULL);
+  if (pixels->clip_region_size) {
+    pixels->clip_region = malloc(pixels->clip_region_size);
+    size_t written = region.writeToMemory(pixels->clip_region);
+    ALOG_ASSERT(written == pixels->clip_region_size);
+  }
+  // WebViewClassic used the DrawFilter for its own purposes (e.g. disabling
+  // dithering when zooming/scrolling) so for now at least, just ignore any
+  // client supplied DrawFilter.
+  ALOGW_IF(canvas->getDrawFilter(),
+           "DrawFilter not supported in webviewchromium, will be ignored");
+  return pixels;
+}
+
+void ReleasePixels(AwPixelInfo* pixels) {
+  delete static_cast<PixelInfo*>(pixels);
+}
+
+jint GetDrawSWFunctionTable(JNIEnv* env, jclass) {
+  static const AwDrawSWFunctionTable function_table = {
+      &GetPixels,
+      &ReleasePixels,
+  };
+  return reinterpret_cast<jint>(&function_table);
+}
+
+const char kClassName[] = "com/android/webview/chromium/GraphicsUtils";
+const JNINativeMethod kJniMethods[] = {
+    { "nativeGetDrawSWFunctionTable", "()I",
+        reinterpret_cast<void*>(GetDrawSWFunctionTable) },
+};
+
+}  // namespace
+
+void RegisterGraphicsUtils(JNIEnv* env) {
+  jclass clazz = env->FindClass(kClassName);
+  LOG_ALWAYS_FATAL_IF(!clazz, "Unable to find class '%s'", kClassName);
+
+  int res = env->RegisterNatives(clazz, kJniMethods, NELEM(kJniMethods));
+  LOG_ALWAYS_FATAL_IF(res < 0, "register native methods failed: res=%d", res);
+}
+
+}  // namespace android