LayerRenderer.h revision 1aa5d2d7068147ff781cfe911a93f01593a68c79 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HWUI_LAYER_RENDERER_H
18#define ANDROID_HWUI_LAYER_RENDERER_H
19
20#include <cutils/compiler.h>
21
22#include "OpenGLRenderer.h"
23#include "Layer.h"
24
25#include <SkBitmap.h>
26
27namespace android {
28namespace uirenderer {
29
30class RenderState;
31
32///////////////////////////////////////////////////////////////////////////////
33// Defines
34///////////////////////////////////////////////////////////////////////////////
35
36// Debug
37#if DEBUG_LAYER_RENDERER
38    #define LAYER_RENDERER_LOGD(...) ALOGD(__VA_ARGS__)
39#else
40    #define LAYER_RENDERER_LOGD(...)
41#endif
42
43///////////////////////////////////////////////////////////////////////////////
44// Renderer
45///////////////////////////////////////////////////////////////////////////////
46
47class LayerRenderer: public OpenGLRenderer {
48public:
49    LayerRenderer(RenderState& renderState, Layer* layer);
50    virtual ~LayerRenderer();
51
52    virtual void onViewportInitialized() { /* do nothing */ }
53    virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque);
54    virtual status_t clear(float left, float top, float right, float bottom, bool opaque);
55    virtual void finish();
56
57    static Layer* createTextureLayer(RenderState& renderState);
58    static Layer* createRenderLayer(RenderState& renderState, uint32_t width, uint32_t height);
59    static bool resizeLayer(Layer* layer, uint32_t width, uint32_t height);
60    static void updateTextureLayer(Layer* layer, uint32_t width, uint32_t height,
61            bool isOpaque, bool forceFilter, GLenum renderTarget, float* textureTransform);
62    static void destroyLayer(Layer* layer);
63    ANDROID_API static void destroyLayerDeferred(Layer* layer);
64    static bool copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap);
65
66    static void flushLayer(RenderState& renderState, Layer* layer);
67
68protected:
69    virtual void ensureStencilBuffer();
70    virtual bool hasLayer() const;
71    virtual Region* getRegion() const;
72    virtual GLuint getTargetFbo() const;
73    virtual bool suppressErrorChecks() const;
74
75private:
76    void generateMesh();
77
78    Layer* mLayer;
79}; // class LayerRenderer
80
81}; // namespace uirenderer
82}; // namespace android
83
84#endif // ANDROID_HWUI_LAYER_RENDERER_H
85