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// Copyright (c) 2013 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.
#ifndef ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
#define ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
#include "base/android/scoped_java_ref.h"
#include "ui/gfx/point.h"
#include "ui/gfx/rect.h"
struct AwDrawGLInfo;
struct AwDrawSWFunctionTable;
namespace content {
class ContentViewCore;
}
namespace gfx {
class Rect;
}
namespace android_webview {
// Interface for all the WebView-specific content rendering operations.
// Provides software and hardware rendering and the Capture Picture API.
class BrowserViewRenderer {
public:
class Client {
public:
// Request DrawGL be called. Passing null canvas implies the request
// will be of AwDrawGLInfo::kModeProcess type. The callback
// may never be made, and the mode may be promoted to kModeDraw.
virtual bool RequestDrawGL(jobject canvas) = 0;
// Called when a new Picture is available. Needs to be enabled
// via the EnableOnNewPicture method.
virtual void OnNewPicture() = 0;
// Called to trigger view invalidations.
virtual void Invalidate() = 0;
// Called to get view's absolute location on the screen.
virtual gfx::Point GetLocationOnScreen() = 0;
protected:
virtual ~Client() {}
};
// Delegate to perform rendering actions involving Java objects.
class JavaHelper {
public:
// Creates a RGBA_8888 Java Bitmap object of the requested size.
virtual base::android::ScopedJavaLocalRef<jobject> CreateBitmap(
JNIEnv* env,
int width,
int height) = 0;
// Draws the provided Java Bitmap into the provided Java Canvas.
virtual void DrawBitmapIntoCanvas(
JNIEnv* env,
const base::android::JavaRef<jobject>& jbitmap,
const base::android::JavaRef<jobject>& jcanvas,
int x,
int y) = 0;
// Creates a Java Picture object that records drawing the provided Bitmap.
virtual base::android::ScopedJavaLocalRef<jobject> RecordBitmapIntoPicture(
JNIEnv* env,
const base::android::JavaRef<jobject>& jbitmap) = 0;
protected:
virtual ~JavaHelper() {}
};
// Global hookup methods.
static void SetAwDrawSWFunctionTable(AwDrawSWFunctionTable* table);
static AwDrawSWFunctionTable* GetAwDrawSWFunctionTable();
static bool IsSkiaVersionCompatible();
// Content control methods.
virtual void SetContents(content::ContentViewCore* content_view_core) = 0;
// Rendering methods.
// Main handler for view drawing: performs a SW draw immediately, or sets up
// a subsequent GL Draw (via Client::RequestDrawGL) and returns true. A false
// return value indicates nothing was or will be drawn.
// |java_canvas| is the target of the draw. |is_hardware_canvas| indicates
// a GL Draw maybe possible on this canvas. |scroll| if the view's current
// scroll offset. |clip| is the canvas's clip bounds.
virtual bool OnDraw(jobject java_canvas,
bool is_hardware_canvas,
const gfx::Point& scroll,
const gfx::Rect& clip) = 0;
// Called in response to a prior Client::RequestDrawGL() call. See
// AwDrawGLInfo documentation for more details of the contract.
virtual void DrawGL(AwDrawGLInfo* draw_info) = 0;
// CapturePicture API methods.
virtual base::android::ScopedJavaLocalRef<jobject> CapturePicture() = 0;
virtual void EnableOnNewPicture(bool enabled) = 0;
// View update notifications.
virtual void OnVisibilityChanged(bool view_visible, bool window_visible) = 0;
virtual void OnSizeChanged(int width, int height) = 0;
virtual void OnAttachedToWindow(int width, int height) = 0;
virtual void OnDetachedFromWindow() = 0;
// Android views hierarchy gluing.
virtual bool IsAttachedToWindow() = 0;
virtual bool IsViewVisible() = 0;
virtual gfx::Rect GetScreenRect() = 0;
virtual ~BrowserViewRenderer() {}
};
} // namespace android_webview
#endif // ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
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