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/*
* Copyright (C) 2010 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.
*/
#ifndef ANDROID_OPENGL_RENDERER_H
#define ANDROID_OPENGL_RENDERER_H
#include <SkXfermode.h>
#include <utils/RefBase.h>
#include "Rect.h"
namespace android {
class Snapshot: public LightRefBase<Snapshot> {
public:
Snapshot() { }
Snapshot(const sp<Snapshot> s): clipRect(s->clipRect), flags(0), previous(s) { }
enum Flags {
kFlagClipSet = 0x1,
};
// Clipping rectangle at the time of this snapshot
Rect clipRect;
// Dirty flags
int flags;
// Previous snapshot in the frames stack
sp<Snapshot> previous;
}; // struct Snapshot
class OpenGLRenderer {
public:
OpenGLRenderer();
~OpenGLRenderer();
void setViewport(int width, int height);
void prepare();
int getSaveCount() const;
int save(int flags);
void restore();
void restoreToCount(int saveCount);
bool clipRect(float left, float top, float right, float bottom);
void drawColor(int color, SkXfermode::Mode mode);
private:
int saveSnapshot();
bool restoreSnapshot();
void setScissorFromClip();
// Dimensions of the drawing surface
int mWidth, mHeight;
// Matrix used for ortho projection in shaders
float mOrthoMatrix[16];
// Number of saved states
int mSaveCount;
// Current state
sp<Snapshot> mSnapshot;
}; // class OpenGLRenderer
}; // namespace android
#endif // ANDROID_OPENGL_RENDERER_H
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