android: Use hw acceleration in android_webview_shell

android_webview/test/shell/src/draw_gl.cc

+// Copyright (c) 2014 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 <jni.h>
+
+#include "draw_gl.h"

[boliu, 2014/08/28 23:15:05]

use full path instead of adding a custom include path?

[no sievers, 2014/08/29 01:30:44]

So using relative paths doesn't work well with DEPS.

But I had the include path point to the base directory instead and then added a
DEPS file for draw_gl to further keep anyone from adding code or dependencies to
this.

+
+extern "C" {
+
+JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+  return JNI_VERSION_1_4;
+}
+
+// This code goes into its own dynamic library, so we cannot depend on
+// any other components like base.
+JNIEXPORT void JNICALL
+    Java_org_chromium_android_1webview_shell_DrawGL_nativeDrawGL(
+        JNIEnv*,
+        jclass,
+        jlong draw_gl,
+        jlong view,
+        jint width,
+        jint height,
+        jint scroll_x,
+        jint scroll_y,
+        jint mode) {
+  void (*fp)(long, AwDrawGLInfo*, void*) =
+      reinterpret_cast<void (*)(long, AwDrawGLInfo*, void*)>(draw_gl);

[boliu, 2014/08/28 23:15:05]

AwDrawGLFunction (typedef in draw_gl.h), also can you move this below to just
before where it's used?

[no sievers, 2014/08/29 01:30:44]

Done.

+   AwDrawGLInfo draw_info;
+   draw_info.mode = static_cast<AwDrawGLInfo::Mode>(mode);

[boliu, 2014/08/28 23:15:05]

draw_info.version = kAwDrawGLInfoVersion;

[no sievers, 2014/08/29 01:30:44]

Done.

+   draw_info.is_layer = true;

[boliu, 2014/08/28 23:15:05]

Not a big deal but most common case is is_layer = false.

[no sievers, 2014/08/29 01:30:44]

Done.

+   draw_info.width = width;
+   draw_info.height = height;
+   draw_info.clip_left = 0;
+   draw_info.clip_top = 0;
+   draw_info.clip_bottom = height;
+   draw_info.clip_right = width;
+   draw_info.transform[0] = 1.0;
+   draw_info.transform[1] = 0.0;
+   draw_info.transform[2] = 0.0;
+   draw_info.transform[3] = 0.0;
+
+   draw_info.transform[4] = 0.0;
+   draw_info.transform[5] = 1.0;
+   draw_info.transform[6] = 0.0;
+   draw_info.transform[7] = 0.0;
+
+   draw_info.transform[8] = 0.0;
+   draw_info.transform[9] = 0.0;
+   draw_info.transform[10] = 1.0;
+   draw_info.transform[11] = 0.0;
+
+   draw_info.transform[12] = -scroll_x;
+   draw_info.transform[13] = -scroll_y;
+   draw_info.transform[14] = 0.0;
+   draw_info.transform[15] = 1.0;
+   fp(view, &draw_info, 0);
+}
+
+}